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Document and Entity Information	12 Months Ended
Document and Entity Information	Dec. 31, 2018
Document and Entity Information [Abstract]
Document Type	8-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Entity Registrant Name	CHESAPEAKE ENERGY CORPORATION
Entity Central Index Key	0000895126
Entity Emerging Growth Company	false

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents ($1 and $2 attributable to our VIE)	$ 4	$ 5
Accounts receivable, net	1,247	1,322
Short-term derivative assets	209	27
Other current assets	138	172
Total Current Assets	1,598	1,526
Oil and natural gas properties, at cost based on successful efforts accounting:
Proved oil and natural gas properties ($755 and $755 attributable to our VIE)	25,407	27,932
Unproved properties	1,561	2,024
Other property and equipment	1,721	1,986
Total Property and Equipment, at Cost	28,689	31,942
Less: accumulated depreciation, depletion and amortization (($707) and ($700) attributable to our VIE)	(17,886)	(18,907)
Property and equipment held for sale, net	15	144
Total Property and Equipment, Net	10,818	13,179
LONG-TERM ASSETS:
Long-term derivative assets	76	0
Other long-term assets	243	220
TOTAL ASSETS	12,735	14,925
CURRENT LIABILITIES:
Accounts payable	763	654
Current maturities of long-term debt, net	381	52
Accrued interest	141	137
Short-term derivative liabilities	3	58
Other current liabilities ($2 and $3 attributable to our VIE)	1,599	1,518
Total Current Liabilities	2,887	2,419
LONG-TERM LIABILITIES:
Long-term debt, net	7,341	9,921
Long-term derivative liabilities	0	4
Asset retirement obligations, net of current portion	155	162
Other long-term liabilities	219	476
Total Long-Term Liabilities	7,715	10,563
CONTINGENCIES AND COMMITMENTS (Note 4)
Chesapeake Stockholders’ Equity:
Preferred stock, $0.01 par value, 20,000,000 shares authorized: 5,603,458 shares outstanding	1,671	1,671
Common stock, $0.01 par value, 2,000,000,000 shares authorized: 913,715,512 and 908,732,809 shares issued	9	9
Additional paid-in capital	14,378	14,437
Accumulated deficit	(13,912)	(14,130)
Accumulated other comprehensive loss	(23)	(57)
Less: treasury stock, at cost; 3,246,553 and 2,240,394 common shares	(31)	(31)
Total Chesapeake Stockholders’ Equity	2,092	1,899
Noncontrolling interests	41	44
Total Equity	2,133	1,943
TOTAL LIABILITIES AND EQUITY	$ 12,735	$ 14,925

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
VIE, cash and cash equivalents	$ 4	$ 5
VIE, proved oil and natural gas properties	25,407	27,932
VIE. accumulated depreciation, depletion and amortization	(17,886)	(18,907)
VIE. other current liabilities	$ 1,599	$ 1,518
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	5,603,458	5,603,458
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	913,715,512	908,732,809
Treasury stock, common shares (in shares)	3,246,553	2,240,394
Variable Interest Entities, Primary Beneficiary [Member]
VIE, cash and cash equivalents	$ 1	$ 2
VIE, proved oil and natural gas properties	755	755
VIE. accumulated depreciation, depletion and amortization	(707)	(700)
VIE. other current liabilities	$ 2	$ 3

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES AND OTHER:
Revenues	$ 10,030	$ 10,039	$ 8,705
Gains (losses) on sales of assets	(264)	476	626
OPERATING EXPENSES:
Production taxes	124	89	74
General and administrative	335	333	322
Restructuring and other termination costs	38	0	6
Provision for legal contingencies, net	26	(38)	123
Depreciation, depletion and amortization	1,737	1,697	1,698
Impairments	131	814	563
Other operating expenses	0	416	377
Total Operating Expenses	9,648	10,177	11,961
INCOME (LOSS) FROM OPERATIONS	382	(138)	(3,256)
OTHER INCOME (EXPENSE):
Interest expense	(633)	(601)	(528)
Gains (losses) on investments	139	0	(137)
Gains on purchases or exchanges of debt	263	233	236
Other income	67	6	5
Total Other Expense	(164)	(362)	(424)
INCOME (LOSS) BEFORE INCOME TAXES	218	(500)	(3,680)
Current income taxes	0	(9)	(19)
Deferred income taxes	(10)	11	(171)
Total Income Tax Expense (Benefit)	(10)	2	(190)
NET INCOME (LOSS)	228	(502)	(3,490)
Net income attributable to noncontrolling interests	(2)	(3)	(3)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	226	(505)	(3,493)
Preferred stock dividends	(92)	(85)	(97)
Loss on exchange of preferred stock	0	(41)	(428)
Earnings allocated to participating securities	(1)	0	0
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ 133	$ (631)	$ (4,018)
EARNINGS (LOSS) PER COMMON SHARE:
Basic (in usd per share)	$ 0.15	$ (0.70)	$ (5.26)
Diluted (in usd per share)	$ 0.15	$ (0.70)	$ (5.26)
WEIGHTED AVERAGE COMMON AND COMMON EQUIVALENT SHARES OUTSTANDING (in millions):
Basic (in shares)	909	906	764
Diluted (in shares)	909	906	764
Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues	$ 5,155	$ 4,985	$ 3,288
Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services	539	562	710
Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services	1,398	1,471	1,855
Marketing [Member]
REVENUES AND OTHER:
Revenues	5,076	4,511	4,584
OPERATING EXPENSES:
Cost of goods and services	5,158	4,598	4,778
Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues	10,231	9,496	7,872
Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services	162	235	1,455
Other [Member]
REVENUES AND OTHER:
Revenues	$ 63	$ 67	$ 207

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 228	$ (502)	$ (3,490)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF INCOME TAX:
Unrealized gains (losses) on derivative instruments, net of income tax benefit of $0, $0, and ($14)	0	5	(13)
Reclassification of losses on settled derivative instruments, net of income tax expense of $0, $0 and $18	34	34	16
Net other comprehensive income	34	39	3
COMPREHENSIVE INCOME (LOSS)	262	(463)	(3,487)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2)	(3)	(3)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	$ 260	$ (466)	$ (3,490)

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Income tax expense (benefit) of $0,$0, $0 and ($1) on unrealized gains (losses) on derivative instruments	$ 0	$ 0	$ (14)
Income tax expense (benefit) of $0, $0, $0 and $3 on reclassification of losses on settled derivative instruments	$ 0	$ 0	$ 18

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ 228	$ (502)	$ (3,490)
ADJUSTMENTS TO RECONCILE NET INCOME (LOSS) TO CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Depreciation, depletion and amortization	1,737	1,697	1,698
Deferred income tax expense (benefit)	(10)	11	(171)
Derivative (gains) losses, net	26	(409)	739
Cash receipts (payments) on derivative settlements, net	(345)	(18)	448
Stock-based compensation	32	49	52
(Gains) losses on sales of assets	264	(476)	(212)
Impairments	131	814	563
Exploratory dry hole expense and leasehold impairments	96	214	1,387
(Gains) losses on investments	(139)	0	137
Gains on purchases or exchanges of debt	(263)	(235)	(236)
Other	(118)	(132)	(127)
(Increase) decrease in accounts receivable and other assets	16	(163)	(4)
(Decrease) increase in accounts payable, accrued liabilities and other	75	(375)	(1,764)
Net Cash Provided By (Used In) Operating Activities	1,730	475	(980)
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(1,848)	(2,113)	(1,192)
Acquisitions of proved and unproved properties	(128)	(88)	(115)
Proceeds from divestitures of proved and unproved properties	2,231	1,249	1,406
Additions to other property and equipment	(21)	(21)	(37)
Proceeds from sales of other property and equipment	147	55	131
Proceeds from sales of investments	74	0	0
Other	0	0	(77)
Net Cash Provided By (Used In) Investing Activities	455	(918)	116
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	11,697	7,771	5,146
Payments on revolving credit facility borrowings	(12,059)	(6,990)	(5,146)
Proceeds from issuance of senior notes, net	1,236	1,585	2,210
Proceeds from issuance of term loan, net	0	0	1,476
Cash paid to purchase debt	(2,813)	(2,592)	(2,734)
Extinguishment of other financing	(122)	0	0
Cash paid for preferred stock dividends	(92)	(183)	0
Distributions to noncontrolling interest owners	(6)	(8)	(10)
Other	(27)	(17)	(21)
Net Cash Provided By (Used In) Financing Activities	(2,186)	(434)	921
Net increase (decrease) in cash and cash equivalents	(1)	(877)	57
Cash and cash equivalents, beginning of period	5	882	825
Cash and cash equivalents, end of period	4	5	882
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of capitalized interest	664	667	576
Income taxes paid, net of refunds received	(3)	(16)	(27)
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Acquisition of other property and equipment including assets under capital lease	27	0	0
Debt exchanged for common stock	0	0	471
Change In Accrued Drilling And Completion Costs [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrual	174	14	(23)
Change In Accrued Acquisitions Of Proved And Unproved Properties [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrual	7	9	(13)
Change In Divested Proved And Unproved Properties [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrual	$ (21)	$ (57)	$ 52

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Preferred stock [Member]	Preferred stock [Member] Preferred stock, exchanged for shares of common stock [Member]	Common Stock [Member]	Common Stock [Member] Conversion of preferred stock into common stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Preferred stock, exchanged for shares of common stock [Member]	Additional Paid-in Capital [Member] Contingent convertible senior notes exchanged for shares of common stock [Member]	Additional Paid-in Capital [Member] Senior notes exchanged for shares of common stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock - Common [Member]	Parent [Member]	Noncontrolling Interest [Member]
Chesapeake stockholders’ equity, beginning of period at Dec. 31, 2015		$ 3,062		$ 7		$ 12,403				$ (13,084)	$ (99)	$ (33)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchased during period, value			$ (1,291)
Stock issued during period, value, conversion of convertible securities				1	$ 1
Stock-based compensation						64
Convertible notes exchanged, value						(165)		$ 241	$ 229
Exchange/ conversion of preferred stock for shares of common stock							$ 1,290
Issuance of 5.5% convertible senior notes due 2026						445
Equity component of contingent convertible notes repurchased, net of tax						(16)
Dividends on preferred stock						0
Issuance costs						(5)
Net income (loss) attributable to Chesapeake	$ (3,493)									(3,493)
Hedging activity											3
Purchase of 1,510,022, 1,206,419, and 37,871 shares for company benefit plans												0
Release of 503,863, 186,529 and 255,091 shares from company benefit plans												6
Chesapeake stockholders’ equity, end of period at Dec. 31, 2016		1,771		9		14,486				(13,625)	(96)	(27)	$ 2,518
Stockholders' equity attributable to noncontrolling interest, beginning of period at Dec. 31, 2015														$ 141
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests	3													3
Distributions to noncontrolling interest owners														(4)
Stockholders' equity attributable to noncontrolling interest, end of period at Dec. 31, 2016														49
Increase (Decrease) in Stockholders' Equity [Roll Forward]
TOTAL EQUITY	2,567
Stock repurchased during period, value			(100)
Stock issued during period, value, conversion of convertible securities				0	0
Stock-based compensation						54
Convertible notes exchanged, value						0		0	0
Exchange/ conversion of preferred stock for shares of common stock							100
Issuance of 5.5% convertible senior notes due 2026						0
Equity component of contingent convertible notes repurchased, net of tax						(20)
Dividends on preferred stock						(183)
Issuance costs						0
Net income (loss) attributable to Chesapeake	(505)									(505)
Hedging activity											39
Purchase of 1,510,022, 1,206,419, and 37,871 shares for company benefit plans												(7)
Release of 503,863, 186,529 and 255,091 shares from company benefit plans												3
Chesapeake stockholders’ equity, end of period at Dec. 31, 2017	1,899	1,671		9		14,437				(14,130)	(57)	(31)	1,899
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests	3													3
Distributions to noncontrolling interest owners														(8)
Stockholders' equity attributable to noncontrolling interest, end of period at Dec. 31, 2017	44													44
Increase (Decrease) in Stockholders' Equity [Roll Forward]
TOTAL EQUITY	1,943
Stock repurchased during period, value			$ 0
Stock issued during period, value, conversion of convertible securities				0	$ 0
Stock-based compensation						33
Convertible notes exchanged, value						0		$ 0	$ 0
Exchange/ conversion of preferred stock for shares of common stock							$ 0
Issuance of 5.5% convertible senior notes due 2026						0
Equity component of contingent convertible notes repurchased, net of tax						0
Dividends on preferred stock						(92)
Issuance costs						0
Net income (loss) attributable to Chesapeake	226									226
Hedging activity											34
Purchase of 1,510,022, 1,206,419, and 37,871 shares for company benefit plans												(4)
Release of 503,863, 186,529 and 255,091 shares from company benefit plans												4
Chesapeake stockholders’ equity, end of period at Dec. 31, 2018	2,092	$ 1,671		$ 9		$ 14,378				$ (13,912)	$ (23)	$ (31)	$ 2,092
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests	2													2
Distributions to noncontrolling interest owners														(5)
Stockholders' equity attributable to noncontrolling interest, end of period at Dec. 31, 2018	41													$ 41
Increase (Decrease) in Stockholders' Equity [Roll Forward]
TOTAL EQUITY	$ 2,133

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Treasury Stock - Common [Member]
Purchase of shares for company benefit plans (in shares)	1,510,022	1,206,419	37,871
Release of shares from company benefit plans (in shares)	503,863	186,529	255,091
Preferred stock exchanged for shares of common stock [Member] \| Preferred stock [Member]
Preferred stock conversions/exchanges (in shares)	0	236,048	1,412,009
Preferred stock exchanged for shares of common stock [Member] \| Additional Paid-in Capital [Member]
Stock issued, conversion (in shares)	0	9,965,835	120,186,195
Convertible notes exchanged for shares of common stock [Member] \| Additional Paid-in Capital [Member]
Stock issued, conversion (in shares)	0	0	55,427,782
Senior notes exchanged for shares of common stock [Member] \| Additional Paid-in Capital [Member]
Stock issued, conversion (in shares)	0	0	53,923,925

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Description of Company Chesapeake Energy Corporation ("Chesapeake", “we,” “our”, “us” or the "Company") is an oil and natural gas exploration and production company engaged in the acquisition, exploration and development of properties for the production of oil, natural gas and natural gas liquids (NGL) from underground reservoirs. Our operations are located onshore in the United States. Basis of Presentation The accompanying consolidated financial statements of Chesapeake were prepared in accordance with GAAP and include the accounts of our direct and indirect wholly owned subsidiaries and entities in which Chesapeake has a controlling financial interest. Intercompany accounts and balances have been eliminated. Recast Financial Information for Change in Accounting Principle In the first quarter of 2019, we voluntarily changed our method of accounting for oil and natural gas exploration and development activities from the full cost method to the successful efforts method. Accordingly, financial information for prior periods presented herein has been recast to reflect retrospective application of the successful efforts method. Although the full cost method of accounting for oil and natural gas exploration and development activities continues to be an accepted alternative, the successful efforts method of accounting is the generally preferred method of the SEC and, because it is more widely used in the industry, we expect the change to improve the comparability of our financial statements to our peers. We also believe the successful efforts method provides a more representational depiction of assets and operating results and provides for our investments in oil and natural gas properties to be assessed for impairment in accordance with Accounting Standards Codification (ASC) Topic 360, Property Plant and Equipment, rather than valuations based on prices and costs prescribed under the full cost method as of the balance sheet date. For detailed information regarding the effects of the change to the successful efforts method, see Note 2. Accounting Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosures in the financial statements. Management evaluates its estimates and related assumptions regularly, including those related to the impairment of oil and natural gas properties, oil and natural gas reserves, derivatives, income taxes, unevaluated properties not subject to evaluation, impairment of other property and equipment, environmental remediation costs, asset retirement obligations, litigation and regulatory proceedings and fair values. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ significantly from these estimates. Consolidation We consolidate entities in which we have a controlling financial interest. We consolidate subsidiaries in which we hold, directly or indirectly, more than 50% of the voting rights and variable interest entities (VIEs) in which we are the primary beneficiary. We consolidate a VIE when we are the primary beneficiary, which is the party that has both (i) the power to direct the activities that most significantly impact the VIE’s economic performance and (ii) through its interests in the VIE, the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. In order to determine whether we own a variable interest in a VIE, we perform a qualitative analysis of the entity’s design, organizational structure, primary decision makers and relevant agreements. We continually monitor our consolidated VIE to determine if any events have occurred that could cause the primary beneficiary to change. See Note 11 for further discussion of our VIE. We use the equity method of accounting to record our net interests where we have the ability to exercise significant influence through our investment but lack a controlling financial interest. Under the equity method, our share of net income (loss) is included in our consolidated statements of operations according to our equity ownership or according to the terms of the applicable governing instrument. Undivided interests in oil and natural gas properties are consolidated on a proportionate basis. Segments Operating segments are defined as components of an enterprise that engage in activities from which it may earn revenues and incur expenses for which separate operational financial information is available and is regularly evaluated by the chief operating decision maker for the purpose of allocating an enterprise’s resources and assessing its operating performance. We have concluded that we have only one reportable operating segment, which is exploration and production because our marketing activities are ancillary to our operations. Noncontrolling Interests Noncontrolling interests represent third-party equity ownership in certain of our consolidated subsidiaries and are presented as a component of equity. See Note 11 for further discussion of noncontrolling interests. Cash and Cash Equivalents For purposes of the consolidated financial statements, we consider investments in all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents. Accounts Receivable Our accounts receivable are primarily from purchasers of oil, natural gas and NGL and from exploration and production companies that own interests in properties we operate. This industry concentration could affect our overall exposure to credit risk, either positively or negatively, because our purchasers and joint working interest owners may be similarly affected by changes in economic, industry or other conditions. We monitor the creditworthiness of all our counterparties and we generally require letters of credit or parent guarantees for receivables from parties deemed to have sub-standard credit, unless the credit risk can otherwise be mitigated. We utilize an allowance method in accounting for bad debt based on historical trends in addition to specifically identifying receivables that we believe may be uncollectible. See Note 8 for further discussion of our accounts receivable. Oil and Natural Gas Properties We follow the successful efforts method of accounting for our oil and natural gas properties. Under this method, exploration costs such as exploratory geological and geophysical costs, expiration of unproved leasehold, delay rentals and exploration overhead are expensed as incurred. All costs related to production, general corporate overhead and similar activities are also expensed as incurred. All property acquisition costs and development costs are capitalized when incurred. Exploratory drilling costs are initially capitalized, or suspended, pending the determination of proved reserves. If proved reserves are found, drilling costs remain capitalized and are classified as proved properties. Costs of unsuccessful wells are charged to exploration expense. For exploratory wells that find reserves that cannot be classified as proved when drilling is completed, costs continue to be capitalized as suspended exploratory drilling costs if there have been sufficient reserves found to justify completion as a producing well and sufficient progress is being made in assessing the reserves and the economic and operational viability of the project. If we determine that future appraisal drilling or development activities are unlikely to occur, associated suspended exploratory well costs are expensed. In some instances, this determination may take longer than one year. We review the status of all suspended exploratory drilling costs quarterly. Costs to develop proved reserves, including the costs of all development wells and related equipment used in the production of oil and natural gas are capitalized. Costs of drilling and equipping successful wells, costs to construct or acquire facilities, and associated asset retirement costs are depreciated using the unit-of-production (UOP) method based on total estimated proved developed oil and gas reserves. Costs of acquiring proved properties, including leasehold acquisition costs transferred from unproved properties, are depleted using the UOP method based on total estimated proved developed and undeveloped reserves. Proceeds from the sales of individual oil and natural gas properties and the capitalized costs of individual properties sold or abandoned are credited and charged, respectively, to accumulated depreciation, depletion and amortization, if doing so does not materially impact the depletion rate of an amortization base. Generally, no gain or loss is recognized until an entire amortization base is sold. However, a gain or loss is recognized from the sale of less than an entire amortization base if the disposition is significant enough to materially impact the depletion rate of the remaining properties in the amortization base. When circumstances indicate that the carrying value of proved oil and gas properties may not be recoverable, we compare unamortized capitalized costs to the expected undiscounted pre-tax future cash flows for the associated assets grouped at the lowest level for which identifiable cash flows are independent of cash flows of other assets. If the expected undiscounted pre-tax future cash flows, based on our estimate of future crude oil and natural gas prices, operating costs, anticipated production from proved reserves and other relevant data, are lower than the unamortized capitalized costs, the capitalized costs are reduced to fair value. Fair value is generally estimated using the income approach described in the ASC 820, Fair Value Measurements. If applicable, we utilize prices and other relevant information generated by market transactions involving assets and liabilities that are identical or comparable to the item being measured as the basis for determining fair value. The expected future cash flows used for impairment reviews and related fair value measurements are typically based on judgmental assessments of future production volumes, commodity prices, operating costs, and capital investment plans, considering all available information at the date of review. These assumptions are applied to develop future cash flow projections that are then discounted to estimated fair value, using a discount rate believed to be consistent with those applied by market participants. We have classified these fair value measurements as Level 3 in the fair value hierarchy. Other Property and Equipment Other property and equipment consists primarily of buildings and improvements, land, vehicles, computers, natural gas compressors under capital lease and office equipment. Major renewals and betterments are capitalized while the costs of repairs and maintenance are charged to expense as incurred. Other property and equipment costs, excluding land, are depreciated on a straight-line basis and recorded within depreciation, depletion and amortization in the consolidated statement of operations. Natural gas compressors under capital lease are depreciated over the shorter of their estimated useful lives or the term of the related lease. Realization of the carrying value of other property and equipment is reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Assets are determined to be impaired if a forecast of undiscounted estimated future net operating cash flows directly related to the asset, including any disposal value, is less than the carrying amount of the asset. If any asset is determined to be impaired, the loss is measured as the amount by which the carrying amount of the asset exceeds its fair value. An estimate of fair value is based on the best information available, including prices for similar assets and discounted cash flow. Capitalized Interest Interest from external borrowings is capitalized on significant investments in major development projects until the asset is ready for service using the weighted average borrowing rate of outstanding borrowings. Capitalized interest is determined by multiplying our weighted average borrowing cost on debt by the average amount of qualifying costs incurred. Capitalized interest is depreciated over the useful lives of the assets in the same manner as the depreciation of the underlying asset. Accounts Payable Included in accounts payable as of December 31, 2018 and 2017 are liabilities of approximately $104 million and $92 million, respectively, representing the amount by which checks issued, but not yet presented to our banks for collection, exceeded balances in applicable bank accounts. Debt Issuance Costs Included in other long-term assets are costs associated with the issuance and amendments of the Chesapeake revolving credit facility. The remaining unamortized issuance costs as of December 31, 2018 and 2017, totaled $30 million and $22 million, respectively, and are being amortized over the life of the Chesapeake revolving credit facility using the straight-line method. Included in debt are costs associated with the issuance of our senior notes. The remaining unamortized issuance costs as of December 31, 2018 and 2017, totaled $53 million and $63 million, respectively, and are being amortized over the life of the senior notes using the effective interest method. Litigation Contingencies We are subject to litigation and regulatory proceedings, claims and liabilities that arise in the ordinary course of business. We accrue losses associated with litigation and regulatory claims when such losses are probable and reasonably estimable. If we determine that a loss is probable and cannot estimate a specific amount for that loss but can estimate a range of loss, our best estimate within the range is accrued. Estimates are adjusted as additional information becomes available or circumstances change. Legal defense costs associated with loss contingencies are expensed in the period incurred. Environmental Remediation Costs We record environmental reserves for estimated remediation costs related to existing conditions from past operations when the responsibility to remediate is probable and the costs can be reasonably estimated. Expenditures that create future benefits or contribute to future revenue generation are capitalized. Asset Retirement Obligations We recognize liabilities for obligations associated with the retirement of tangible long-lived assets that result from the acquisition, construction and development of the assets. We recognize the fair value of a liability for a retirement obligation in the period in which the liability is incurred. For oil and natural gas properties, this is the period in which an oil or natural gas well is acquired or drilled. The liability is then accreted each period until the liability is settled or the well is sold, at which time the liability is removed. The related asset retirement cost is capitalized as part of the carrying amount of our oil and natural gas properties. See Note 23 for further discussion of asset retirement obligations. Revenue Recognition Revenue from the sale of oil, natural gas and NGL is recognized upon the transfer of control of the products, which is typically when the products are delivered to customers. Prior to the adoption of Revenue from Contracts with Customers (Topic 606) on January 1, 2018, revenue from the sale of oil, natural gas and NGL was recognized when title passed to customers. Revenue is recognized net of royalties due to third parties in an amount that reflects the consideration we expect to receive in exchange for those products. Revenue from contracts with customers includes the sale of our oil, natural gas and NGL production (recorded as oil, natural gas and NGL revenues in the consolidated statements of operations) as well as the sale of certain of our joint interest holders’ production which we purchase under joint operating arrangements (recorded in marketing revenues in the consolidated statements of operations). In connection with the marketing of these products, we obtain control of the oil, natural gas and NGL we purchase from other interest owners at defined delivery points and deliver the product to third parties, at which time revenues are recorded. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 days. There are no significant judgments that significantly affect the amount or timing of revenue from contracts with customers. We also earn revenue from other sources, including from a variety of derivative and hedging activities to reduce our exposure to fluctuations in future commodity prices and to protect our expected operating cash flow against significant market movements or volatility, (recorded within oil, natural gas and NGL revenues in the consolidated statements of operations) as well as a variety of oil, natural gas and NGL purchase and sale contracts with third parties for various commercial purposes, including credit risk mitigation and satisfaction of our pipeline delivery commitments (recorded within marketing revenues in the consolidated statements of operations). In circumstances where we act as an agent rather than a principal, our results of operations related to oil, natural gas and NGL marketing activities are presented on a net basis. Fair Value Measurements Certain financial instruments are reported on a recurring basis at fair value on our consolidated balance sheets. We also use fair value measurements on a nonrecurring basis when a qualitative assessment of our assets indicates a potential impairment. Under fair value measurement accounting guidance, fair value is defined as the amount that would be received from the sale of an asset or paid for the transfer of a liability in an orderly transaction between market participants (i.e. an exit price). To estimate an exit price, a three-level hierarchy is used. The fair value hierarchy prioritizes the inputs, which refer broadly to assumptions market participants would use in pricing an asset or a liability, into three levels. Level 1 inputs are unadjusted quoted prices in active markets for identical assets and liabilities and have the highest priority. Level 2 inputs are inputs other than quoted prices within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability and have the lowest priority. The valuation techniques that may be used to measure fair value include a market approach, an income approach and a cost approach. A market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. An income approach uses valuation techniques to convert future amounts to a single present amount based on current market expectations, including present value techniques, option-pricing models and the excess earnings method. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). The carrying values of financial instruments comprising cash and cash equivalents, accounts payable and accounts receivable approximate fair values due to the short-term maturities of these instruments. Derivatives Derivative instruments are recorded at fair value, and changes in fair value are recognized currently in earnings unless specific hedge accounting criteria are followed. As of December 31, 2018, none of our open derivative instruments were designated as cash flow hedges. Derivative instruments reflected as current in the consolidated balance sheets represent the estimated fair value of derivatives scheduled to settle over the next twelve months based on market prices/rates as of the respective balance sheet dates. Cash settlements of our derivative instruments are generally classified as operating cash flows unless the derivatives are deemed to contain, for accounting purposes, a significant financing element at contract inception, in which case these cash settlements are classified as financing cash flows in the accompanying consolidated statement of cash flows. All of our derivative instruments are subject to master netting arrangements by contract type which provide for the offsetting of asset and liability positions within each contract type, as well as related cash collateral if applicable, by counterparty. Therefore, we net the value of our derivative instruments by contract type with the same counterparty in the accompanying consolidated balance sheets. We have established the fair value of our derivative instruments using established index prices, volatility curves and discount factors. These estimates are compared to our counterparty values for reasonableness. The values we report in our financial statements are as of a point in time and subsequently change as these estimates are revised to reflect actual results, changes in market conditions and other factors. Derivative transactions are subject to the risk that counterparties will be unable to meet their obligations. This non-performance risk is considered in the valuation of our derivative instruments, but to date has not had a material impact on the values of our derivatives. See Note 14 for further discussion of our derivative instruments. Share-Based Compensation Our share-based compensation program consists of restricted stock, stock options, performance share units and cash restricted stock units granted to employees and restricted stock granted to non-employee directors under our Long Term Incentive Plan. We recognize the cost of employee services received in exchange for restricted stock and stock options based on the fair value of the equity instruments as of the grant date. For employees, this value is amortized over the vesting period, which is generally three years from the grant date. For directors, although restricted stock grants vest over three years, this value is recognized immediately as there is a non-substantive service condition for vesting. Because performance share units are settled in cash, they are classified as a liability in our consolidated financial statements and are measured at fair value as of the grant date and re-measured at fair value at the end of each reporting period. These fair value adjustments are recognized as general and administrative expense in the consolidated statements of operations. To the extent compensation expense relates to employees directly involved in the acquisition of oil and natural gas leasehold and development activities, these amounts are capitalized to oil and natural gas properties. Amounts not capitalized to oil and natural gas properties are recognized as general and administrative expense, oil, natural gas and NGL production expense, exploration expense, or marketing expense, based on the employees involved in those activities. See Note 12 for further discussion of share-based compensation. Recently Issued Accounting Standards The Financial Accounting Standards Board (FASB) issued Topic 606 superseding virtually all existing revenue recognition guidance. We adopted this new standard in the first quarter of 2018 using the modified retrospective approach. See Note 8 for further details regarding our adoption of Topic 606. In February 2018, the FASB issued Accounting Standards Update (ASU) 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The new standard allows for stranded tax effects resulting from the tax reform legislation commonly known as the Tax Cuts and Jobs Act, which was signed into law on December 22, 2017 (the “Tax Act”), previously recognized in accumulated other comprehensive income to be reclassified to retained earnings. For public business entities, the amendments are effective for annual periods, including interim periods within the annual periods, beginning after December 15, 2018. This standard is effective for us beginning on January 1, 2019, and we will elect not to reclassify the income tax effects of the Tax Act from accumulated other comprehensive income to retained earnings. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), which makes significant changes to the current hedge accounting guidance. The new standard eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The new standard also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. The new standard update is effective for annual and interim periods beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, but we do not plan to early adopt. We plan to adopt this standard on January 1, 2019 and do not expect it to have an impact on our consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for all leases, including operating leases, with terms in excess of 12 months. This ASU modifies the definition of a lease and outlines the recognition, measurement, presentation, and disclosure of leasing arrangements by both lessees and lessors. The standard will not apply to our leases of mineral rights to explore for or use oil and natural gas resources, including the intangible rights to explore for those natural resources and rights to use the land in which those natural resources are contained. We plan to make certain elections permitting us to not reassess whether any expired or existing contracts contained leases, permitting us to not reassess the lease classification for any expired or existing leases (all existing leases that were classified as operating leases in accordance with Topic 840 will be classified as operating leases, and all existing leases that were classified as capital leases in accordance with Topic 840 will be classified as finance leases), and permitting us to not reassess initial direct costs for any existing leases. We will also take an election permitting us to continue applying our current policy for land easements that existed as of, or expired before, the effective date and to not recognize a ROU asset or lease liability for short-term leases. We have completed our assessment of contracts potentially affected by the new standard and have completed our assessment of the accounting treatment for these leases. The adoption will primarily impact other assets and other liabilities and will also impact ongoing disclosures but will not have a material impact on our balance sheet, results of operations or cash flows. We plan to adopt the new standard on January 1, 2019, the effective date, and as permitted by ASU 2018-11 we will not adjust comparative-period financial statements and will continue to apply the guidance in ASC 840, including its disclosure requirements, in the comparative periods presented prior to adoption. Reclassifications Certain reclassifications have been made to the consolidated financial statements for 2017 and 2016 to conform to the presentation used for the 2018 consolidated financial statements.

Change in Accounting Principle

12 Months Ended

Dec. 31, 2018

Accounting Changes and Error Corrections [Abstract]

Change in Accounting Principle

In the first quarter of 2019, we voluntarily changed our method of accounting for oil and natural gas exploration and development activities from the full cost method to the successful efforts method. Accordingly, financial information for prior periods presented herein has been recast to reflect retrospective application of the successful efforts method. In general, under the successful efforts method, exploration costs such as exploratory dry holes, exploratory geophysical and geological costs, delay rentals, unproved leasehold impairments and exploration overhead are charged against earnings as incurred, versus being capitalized under the full cost method of accounting. The successful efforts method also provides for the assessment of potential property impairments by comparing the net carrying value of oil and natural gas properties to associated projected undiscounted pre-tax future net cash flows. If the expected undiscounted pre-tax future net cash flows are lower than the unamortized capitalized costs, the capitalized costs are reduced to fair value. Under the full cost method of accounting, a write-down would be required if the net carrying value of oil and natural gas properties exceeds a full cost ceiling using an unweighted arithmetic average of commodity prices in effect on the first day of each of the previous 12 months. In addition, gains or losses, if applicable, are generally recognized on the disposition of oil and natural gas property and equipment under the successful efforts method, as opposed to an adjustment to the net carrying value of the assets remaining under the full cost method. Our consolidated financial statements have been recast to reflect these differences.



	December 31, 2018
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	69,642		$	(44,235	)	$	25,407
Unproved properties	$	2,337		$	(776	)	$	1,561
Total Property and Equipment, at Cost	$	73,700		$	(45,011	)	$	28,689
Less: accumulated depreciation, depletion and amortization (($461) and ($707) attributable to our VIE)	$	(64,685	)	$	46,799		$	(17,886	)
Total Property and Equipment, Net	$	9,030		$	1,788		$	10,818
Total Assets	$	10,947		$	1,788		$	12,735
Other current liabilities	$	1,540		$	59		$	1,599
Other long-term liabilities	$	156		$	63		$	219
Total long-term liabilities	$	7,652		$	63		$	7,715
Accumulated deficit	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake Stockholders’ Equity	$	344		$	1,748		$	2,092
Noncontrolling interests	$	123		$	(82	)	$	41
Total Equity	$	467		$	1,666		$	2,133
Total Liabilities and Equity	$	10,947		$	1,788		$	12,735



	December 31, 2017
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other current assets	$	171		$	1		$	172
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	68,858		$	(40,926	)	$	27,932
Unproved properties	$	3,484		$	(1,460	)	$	2,024
Total Property and Equipment, at Cost	$	74,328		$	(42,386	)	$	31,942
Less: accumulated depreciation, depletion and amortization (($461) and ($700) attributable to our VIE)	$	(63,664	)	$	44,757		$	(18,907	)
Property and equipment held for sale, net	$	16		$	128		$	144
Total Property and Equipment, Net	$	10,680		$	2,499		$	13,179
Total Assets	$	12,425		$	2,500		$	14,925
Other current liabilities	$	1,455		$	63		$	1,518
Other long-term liabilities	$	354		$	122		$	476
Total long-term liabilities	$	10,441		$	122		$	10,563
Accumulated deficit	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake Stockholders’ Equity (Deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests	$	124		$	(80	)	$	44
Total Equity (Deficit)	$	(372	)	$	2,315		$	1,943
Total Liabilities and Equity	$	12,425		$	2,500		$	14,925



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	63		$	63
Loss on sale of assets	$	—		$	(264	)	$	(264	)
Total revenues	$	10,231		$	(201	)	$	10,030
Exploration expense	$	—		$	162		$	162
General and administrative	$	280		$	55		$	335
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and natural gas properties	$	578		$	(578	)	$	—
Impairments	$	53		$	78		$	131
Other operating expenses	$	10		$	(10	)	$	—
Total operating expenses	$	9,349		$	299		$	9,648
Income (loss) from operations	$	882		$	(500	)	$	382
Interest expense	$	(487	)	$	(146	)	$	(633	)
Other income	$	70		$	(3	)	$	67
Total other expense	$	(15	)	$	(149	)	$	(164	)
Income (loss) before income taxes	$	867		$	(649	)	$	218
Net income (loss)	$	877		$	(649	)	$	228
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	2		$	(2	)
Net income (loss) attributable to Chesapeake	$	873		$	(647	)	$	226
Earnings allocated to participating securities	$	(6	)	$	5		$	(1	)
Net income (loss) available to common stockholders	$	775		$	(642	)	$	133
Earnings (loss) per common share basic	$	0.85		$	(0.70	)	$	0.15
Earnings (loss) per common share diluted	$	0.85		$	(0.70	)	$	0.15



	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	67		$	67
Gain on sales of assets	$	—		$	476		$	476
Total revenues	$	9,496		$	543		$	10,039
Exploration expense	$	—		$	235		$	235
General and administrative	$	262		$	71		$	333
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Impairments	$	5		$	809		$	814
Other operating expenses	$	413		$	3		$	416
Total operating expenses	$	8,357		$	1,820		$	10,177
Income (loss) from operations	$	1,139		$	(1,277	)	$	(138	)
Interest expense	$	(426	)	$	(175	)	$	(601	)
Other income	$	9		$	(3	)	$	6
Total other expense	$	(184	)	$	(178	)	$	(362	)
Income (loss) before income taxes	$	955		$	(1,455	)	$	(500	)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	1		$	(3	)
Net income (loss) attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Earnings allocated to participating securities	$	(10	)	$	10		$	—
Net income (loss) available to common stockholders	$	813		$	(1,444	)	$	(631	)
Earnings (loss) per common share basic	$	0.90		$	(1.60	)	$	(0.70	)
Earnings (loss) per common share diluted	$	0.90		$	(1.60	)	$	(0.70	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	207		$	207
Gain on sales of assets	$	—		$	626		$	626
Total revenues	$	7,872		$	833		$	8,705
Exploration expense	$	—		$	1,455		$	1,455
General and administrative	$	240		$	82		$	322
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Impairments	$	3,025		$	(2,462	)	$	563
Other operating expenses	$	365		$	12		$	377
Total operating expenses	$	12,283		$	(322	)	$	11,961
Income (loss) from operations	$	(4,411	)	$	1,155		$	(3,256	)
Interest expense	$	(296	)	$	(232	)	$	(528	)
Other income	$	19		$	(14	)	$	5
Total other expense	$	(178	)	$	(246	)	$	(424	)
Income (loss) before income taxes	$	(4,589	)	$	909		$	(3,680	)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Net (income) loss attributable to noncontrolling interest	$	9		$	(12	)	$	(3	)
Net income (loss) attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Net income (loss) available to common stockholders	$	(4,915	)	$	897		$	(4,018	)
Earnings (loss) per common share basic	$	(6.43	)	$	1.17		$	(5.26	)
Earnings (loss) per common share diluted	$	(6.43	)	$	1.17		$	(5.26	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	877		$	(649	)	$	228
Comprehensive income (loss)	$	911		$	(649	)	$	262
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	2		$	(2	)
Comprehensive income (loss) attributable to Chesapeake	$	907		$	(647	)	$	260

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Comprehensive income (loss)	$	992		$	(1,455	)	$	(463	)
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	1		$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	988		$	(1,454	)	$	(466	)

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Comprehensive income (loss)	$	(4,396	)	$	909		$	(3,487	)
Comprehensive (income) loss attributable to noncontrolling interests	$	9		$	(12	)	$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	(4,387	)	$	897		$	(3,490	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income	$	877		$	(649	)	$	228
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and gas properties	$	578		$	(578	)	$	—
Losses on sales of assets	$	—		$	264		$	264
Impairments	$	53		$	78		$	131
Exploratory dry hole expense and leasehold impairments	$	—		$	96		$	96
Other	$	(108	)	$	(10	)	$	(118	)
Increase in accounts payable, accrued liabilities and other	$	138		$	(63	)	$	75
Net cash provided by operating activities	$	2,000		$	(270	)	$	1,730
Drilling and completion costs	$	(1,958	)	$	110		$	(1,848	)
Acquisition of proved and unproved properties	$	(288	)	$	160		$	(128	)
Net cash provided by investing activities	$	185		$	270		$	455

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Gains on sales of assets	$	—		$	(476	)	$	(476	)
Impairments	$	5		$	809		$	814
Exploratory dry hole expense and leasehold impairments	$	—		$	214		$	214
Other	$	(135	)	$	3		$	(132	)
Decrease in accounts payable, accrued liabilities and other	$	(308	)	$	(67	)	$	(375	)
Net cash provided by operating activities	$	745		$	(270	)	$	475
Drilling and completion costs	$	(2,186	)	$	73		$	(2,113	)
Acquisition of proved and unproved properties	$	(285	)	$	197		$	(88	)
Net cash used in investing activities	$	(1,188	)	$	270		$	(918	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net loss	$	(4,399	)	$	909		$	(3,490	)
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Gain on sales of assets	$	—		$	(212	)	$	(212	)
Impairments	$	3,025		$	(2,462	)	$	563
Exploratory dry hole expense and leasehold impairments	$	—		$	1,387		$	1,387
Other	$	(145	)	$	18		$	(127	)
Decrease in accounts payable, accrued liabilities and other	$	(757	)	$	(1,007	)	$	(1,764	)
Net cash used in operating activities	$	(204	)	$	(776	)	$	(980	)
Drilling and completion costs	$	(1,295	)	$	103		$	(1,192	)
Acquisition of proved and unproved properties	$	(788	)	$	673		$	(115	)
Net cash provided by (used in) investing activities	$	(660	)	$	776		$	116



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(16,525	)	$	2,395		$	(14,130	)
Net income attributable to Chesapeake	$	873		$	(647	)	$	226
Accumulated deficit, end of period	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake stockholders’ equity (deficit)	$	344		$	1,748		$	2,092
Noncontrolling interests, beginning of period	$	124		$	(80	)	$	44
Net income (loss) attributable to noncontrolling interests	$	4		$	(2	)	$	2
Noncontrolling interests, end of period	$	123		$	(82	)	$	41
Total equity (deficit)	$	467		$	1,666		$	2,133

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(17,474	)	$	3,849		$	(13,625	)
Net income attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Accumulated deficit, end of period	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake stockholders’ equity (deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests, beginning of period	$	128		$	(79	)	$	49
Net income (loss) attributable to noncontrolling interests	$	4		$	(1	)	$	3
Noncontrolling interests, end of period	$	124		$	(80	)	$	44
Total equity (deficit)	$	(372	)	$	2,315		$	1,943

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Cumulative effect of change in accounting principle	$	—		$	2,952		$	2,952
Accumulated deficit, end of period	$	(17,474	)	$	3,849		$	(13,625	)
Total Chesapeake stockholders’ equity (deficit)	$	(1,331	)	$	3,849		$	2,518
Noncontrolling interests, beginning of period	$	141		$	—		$	141
Net income (loss) attributable to noncontrolling interests	$	(9	)	$	12		$	3
Cumulative effect of change in accounting principle	$	—		$	(91	)	$	(91	)
Noncontrolling interests, end of period	$	128		$	(79	)	$	49
Total equity (deficit)	$	(1,203	)	$	3,770		$	2,567

Earnings Per Share

12 Months Ended

Dec. 31, 2018

Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]

Earnings Per Share

Basic earnings per share (EPS) is calculated using the weighted average number of common shares outstanding during the period and includes the effect of any participating securities as appropriate. Participating securities consist of unvested restricted stock issued to our employees and non-employee directors that provide dividend rights.

Diluted EPS is calculated assuming the issuance of common shares for all potentially dilutive securities, provided the effect is not antidilutive. For all periods presented, our contingent convertible senior notes did not have a dilutive effect and, therefore, were excluded from the calculation of diluted EPS. See Note 4 for further discussion of our convertible senior notes and contingent convertible senior notes.

Shares of common stock for the following dilutive securities were excluded from the calculation of diluted EPS as the effect was antidilutive.



	Years Ended December 31,
	2018	2017	2016
	(in millions)
Common stock equivalent of our preferred stock outstanding	60	60	63
Common stock equivalent of our convertible senior notes outstanding	146	146	146
Common stock equivalent of our preferred stock outstanding prior to exchange	—	1	37
Participating securities	1	1	1

Debt

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Debt

Our long-term debt consisted of the following as of December 31, 2018 and 2017:



	December 31, 2018						December 31, 2017
	Principal Amount			Carrying Amount			Principal Amount			Carrying Amount
	($ in millions)
7.25% senior notes due 2018	—			—			44			44
Floating rate senior notes due 2019	380			380			380			380
6.625% senior notes due 2020	437			437			437			437
6.875% senior notes due 2020	227			227			227			227
6.125% senior notes due 2021	548			548			548			548
5.375% senior notes due 2021	267			267			267			267
4.875% senior notes due 2022	451			451			451			451
8.00% senior secured second lien notes due 2022^(a)	—			—			1,416			1,895
5.75% senior notes due 2023	338			338			338			338
7.00% senior notes due 2024	850			850			—			—
8.00% senior notes due 2025	1,300			1,291			1,300			1,290
5.5% convertible senior notes due 2026^(b)(c)(d)	1,250			866			1,250			837
7.5% senior notes due 2026	400			400			—			—
8.00% senior notes due 2027	1,300			1,299			1,300			1,298
2.25% contingent convertible senior notes due 2038^(b)(d)	1			1			9			8
Term loan due 2021	—			—			1,233			1,233
Revolving credit facility	419			419			781			781
Debt issuance costs	—			(53		)	—			(63		)
Interest rate derivatives	—			1			—			2
Total debt, net	8,168			7,722			9,981			9,973
Less current maturities of long-term debt, net^(e)	(381		)	(381		)	(53		)	(52		)
Total long-term debt, net	$	7,787		$	7,341		$	9,928		$	9,921

___________________________________________


(a)	The carrying amount as of December 31, 2017 included a premium amount of $479 million associated with a troubled debt restructuring. The premium was being amortized based on the effective yield method.

(b)

We are required to account for the liability and equity components of our convertible debt instruments separately and to reflect interest expense through the first demand repurchase date, as applicable, at the interest rate of similar nonconvertible debt at the time of issuance. The applicable rates for our 2.25% Contingent Convertible Senior Notes due 2038 and our 5.5% Convertible Senior Notes due 2026 are 8.0% and 11.5%, respectively.


(c)	The conversion and redemption provisions of our convertible senior notes are as follows:

Optional Conversion by Holders. Prior to maturity under certain circumstances and at the holder’s option, the notes are convertible. The notes may be converted into cash, our common stock, or a combination of cash and common stock, at our election. One triggering circumstance is when the price of our common stock exceeds a threshold amount during a specified period in a fiscal quarter. Convertibility based on common stock price is measured quarterly. During the fourth quarter of 2018, the price of our common stock was below the threshold level and, as a result, the holders do not have the option to convert their notes in the first quarter of 2019 under this provision. The notes are also convertible, at the holder’s option, during specified five-day periods if the trading price of the notes is below certain levels determined by reference to the trading price of our common stock. The notes were not convertible under this provision during the year ended December 31, 2018. Upon conversion of a convertible senior note, the holder will receive cash, common stock or a combination of cash and common stock, at our election, according to the conversion rate specified in the indenture.

The common stock price conversion threshold amount for the convertible senior notes is 130% of the conversion price of $8.568.

Optional Redemption by the Company. We may redeem the convertible senior notes for cash on or after September 15, 2019, if the price of our common stock exceeds 130% of the conversion price during a specified period at a redemption price of 100% of the principal amount of the notes.

Holders’ Demand Repurchase Rights. The holders of our convertible senior notes may require us to repurchase, in cash, all or a portion of their notes at 100% of the principal amount of the notes upon certain fundamental changes.


(d)	The carrying amounts as of December 31, 2018 and 2017, are reflected net of discounts of $384 million and $414 million, respectively, associated with the equity component of our convertible and contingent convertible senior notes. This amount is being amortized based on the effective yield method through the first demand repurchase date as applicable.


(e)	As of December 31, 2018, net current maturities of long-term debt includes our Floating Rate Senior Notes due April 2019 and our 2.25% Contingent Convertible Senior Notes due 2038.

Debt maturities for the next five years and thereafter are as follows:



	Principal Amount of Debt Securities
	($ in millions)
2019	$	381
2020	664
2021	815
2022	451
2023	757
Thereafter	5,100
Total	$	8,168

Debt Issuances and Retirements 2018

We issued at par $850 million of 7.00% Senior Notes due 2024 (“2024 notes”) and $400 million of 7.50% Senior Notes due 2026 (“2026 notes”) pursuant to a public offering for net proceeds of approximately $1.236 billion. We may redeem some or all of the 2024 notes at any time prior to April 1, 2021 and some or all of the 2026 notes at any time prior to October 1, 2021, in each case at a price equal to 100% of the principal amount of the notes to be redeemed plus a “make-whole” premium. At any time prior to April 1, 2021, with respect to the 2024 notes, and October 1, 2021, with respect to the 2026 notes, we also may redeem up to 35% of the aggregate principal amount of each series of notes with an amount of cash not greater than the net cash proceeds of certain equity offerings at a specified redemption price. In addition, we may redeem some or all of the 2024 notes at any time on or after April 1, 2021 and some or all of the 2026 notes at any time on or after October 1, 2021, in each case at the redemption prices in accordance with the terms of the notes and the indenture and supplemental indenture governing the notes. These senior notes are unsecured obligations of Chesapeake and rank equally in right of payment with all of our other existing and future senior unsecured indebtedness and rank senior in right of payment to all of our future subordinated indebtedness. Our obligations under the senior notes are jointly and severally, fully and unconditionally guaranteed by certain of our direct and indirect wholly owned subsidiaries.

We used the net proceeds from the 2024 and 2026 notes, together with cash on hand and borrowings under the Chesapeake revolving credit facility, to repay in full $1.233 billion of borrowings under our secured term loan due 2021 for $1.285 billion, which included a $52 million make-whole premium. We recorded a loss of approximately $65 million associated with the repayment of the term loan, including the make-whole premium and the write-off of $13 million of associated deferred charges.

We used a portion of the proceeds from the sale of our Utica Shale assets in Ohio to redeem all of the $1.416 billion aggregate principal amount outstanding of our 8.00% Senior Secured Second Lien Notes due 2022 for $1.477 billion. We recorded a gain of approximately $331 million associated with the redemption, including the realization of the remaining $391 million difference in principal and book value due to troubled debt restructuring accounting in 2015, offset by the make-whole premium of $60 million.

We repaid upon maturity $44 million principal amount of our 7.25% Senior Notes due 2018.

As required by the terms of the indenture for our 2.25% Contingent Convertible Senior Notes due 2038 (“2038 notes”), the holders were provided the option to require us to purchase on December 15, 2018, all or a portion of the holders’ 2038 notes at par plus accrued and unpaid interest up to, but excluding, December 15, 2018. On December 17, 2018, we paid an aggregate of approximately $8 million to purchase all of the 2038 notes that were tendered and not withdrawn. An aggregate of $1 million principal amount of the 2038 notes remained outstanding as of December 31, 2018. Subsequent to December 31, 2018, we redeemed these notes at par and discharged the related indenture.

Debt Issuances and Retirements - 2017

We issued through two private placements $1.300 billion aggregate principal amount of unsecured 8.00% Senior Notes due 2027 for net proceeds of approximately $1.285 billion. The first private placement was issued at par and the second private placement was issued at 99.75% of par. Some or all of the notes may be redeemed at any time prior to June 15, 2022, subject to a make-whole premium. We also may redeem some or all of the notes at any time on or after June 15, 2022, at the applicable redemption price in accordance with the terms of the notes and the indenture and supplemental indenture governing the notes. In addition, subject to certain conditions, we may redeem up to 35% of the aggregate principal amount of the notes at any time prior to June 15, 2020, at a price equal to 108% of the principal amount of the notes to be redeemed using the net proceeds of certain equity offerings.

We also issued in a private placement $300 million aggregate principal amount of additional 8.00% Senior Notes due 2025 (“new 2025 notes”) at 101.25% of par for net proceeds of $301 million. The new 2025 notes are an additional issuance of our outstanding 8.00% Senior Notes due 2025, which we issued in 2016 in an original aggregate principal amount of $1.0 billion at 98.52% of par. The new 2025 Notes issued and the previously issued senior notes due 2025 will be treated as a single class of notes under the indenture.

We retired $2.389 billion principal amount of our outstanding senior notes, senior secured second lien notes, contingent convertible notes and term loan through purchases in the open market, tender offers or repayment upon maturity for $2.592 billion using proceeds from the issuances described above. For the open market repurchases and tender offers, we recorded a net aggregate gain of approximately $233 million, including $374 million of premium associated with our 8.00% Senior Secured Second Lien Notes due 2022.

Senior Notes and Convertible Senior Notes

Our senior notes and our convertible senior notes are unsecured senior obligations of Chesapeake and rank equally in right of payment with all of our other existing and future senior unsecured indebtedness and rank senior in right of payment to all of our future subordinated indebtedness. Our obligations under the senior notes and the convertible senior notes are jointly and severally, fully and unconditionally guaranteed by certain of our direct and indirect wholly owned subsidiaries. See Note 25 for consolidating financial information regarding our guarantor and non-guarantor subsidiaries.

We may redeem the senior notes, other than the convertible senior notes, at any time at specified make-whole or redemption prices. Our senior notes are governed by indentures containing covenants that may limit our ability and our subsidiaries’ ability to incur certain secured indebtedness, enter into sale-leaseback transactions, and consolidate, merge or transfer assets. The indentures governing the senior notes and the convertible senior notes do not have any financial or restricted payment covenants. Indentures for the senior notes and convertible senior notes have cross default provisions that apply to other indebtedness Chesapeake or any guarantor subsidiary may have from time to time with an outstanding principal amount of at least $50 million or $75 million, depending on the indenture.

Chesapeake Revolving Credit Facility

In 2018, we amended and restated our credit agreement dated December 15, 2014. The amended and restated Chesapeake revolving credit facility matures in September 2023 and the aggregate initial commitment of the lenders and borrowing base under the facility is $3.0 billion. The Chesapeake revolving credit facility provides for an accordion feature, pursuant to which the aggregate commitments thereunder may be increased to up to $4.0 billion from time to time, subject to agreement of the participating lenders and certain other customary conditions. Borrowing base redeterminations will continue to occur semiannually and our next borrowing base redetermination is scheduled for the second quarter of 2019. As of December 31, 2018, we had outstanding borrowings of $419 million under the Chesapeake revolving credit facility and had used $107 million of the Chesapeake revolving credit facility for various letters of credit. We recorded a loss of $3 million associated with certain deferred charges related to the Chesapeake revolving credit facility prior to its amendment and restatement.

Borrowings under the Chesapeake revolving credit facility bear interest at an alternative base rate (ABR) or LIBOR, at our election, plus an applicable margin ranging from 0.50%-2.00% per annum for ABR loans and 1.50%-3.00% per annum for LIBOR loans, depending on the percentage of the borrowing base then being utilized and whether our leverage ratio exceeds 4.00 to 1.

The Chesapeake revolving credit facility is subject to various financial and other covenants. The terms of the revolving credit facility include covenants limiting, among other things, our ability to incur additional indebtedness, make investments or loans, incur liens, consummate mergers and similar fundamental changes, make restricted payments, make investments in unrestricted subsidiaries and enter into transactions with affiliates. The Chesapeake revolving credit facility contains financial covenants that, after the suspension of most of the covenants during the fourth quarter of 2018 as a result of the closing of the sale of certain of our Utica Shale, beginning in the first quarter of 2019, require us to maintain (i) a leverage ratio of not more than 5.50 to 1 through the fiscal quarter ending September 30, 2019, which threshold decreases over time to 4.00 to 1 for the fiscal quarter ending March 31, 2021 and each fiscal quarter thereafter, (ii) a secured leverage ratio of not more than 2.50 to 1 until the later of (x) the fiscal quarter ending March 31, 2021 or (y) the fiscal quarter in when the Company’s leverage ratio does not exceed 4.00 to 1 and (iii) a fixed charge coverage ratio of not less than 2.00 to 1 through the fiscal quarter ending December 31, 2019; not less than 2.25 to 1 through the fiscal quarter ending June 30, 2020; and not less than 2.50 to 1 for the fiscal quarter ended September 30, 2020 and thereafter.

For the fiscal quarter ended December 31, 2018, our only applicable financial covenant required us to maintain a leverage ratio of not more than 5.50 to 1.

As of December 31, 2018, we were in compliance with all applicable financial covenants under the credit agreement and we were able to borrow up to the full availability under the Chesapeake revolving credit facility.

Fair Value of Debt

We estimate the fair value of our senior notes based on the market value of our publicly traded debt as determined based on the yield of our senior notes (Level 1). The fair value of all other debt is based on a market approach using estimates provided by an independent investment financial data services firm (Level 2). Fair value is compared to the carrying value, excluding the impact of interest rate derivatives, in the table below:



	December 31, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
			($ in millions)
Short-term debt (Level 1)	$	381	$	379	$	52	$	53
Long-term debt (Level 1)	$	3,495	$	3,173	$	2,633	$	2,629
Long-term debt (Level 2)	$	3,846	$	3,644	$	7,286	$	7,301

Contingencies and Commitments

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Contingencies and Commitments

Contingencies

Litigation and Regulatory Proceedings

We are involved in a number of litigation and regulatory proceedings including those described below. Many of these proceedings are in early stages, and many of them seek or may seek damages and penalties, the amount of which is indeterminate. Our total accrued liability in respect of litigation and regulatory proceedings is determined on a case-by-case basis and represents an estimate of probable losses after considering, among other factors, the progress of each case or proceeding, our experience and the experience of others in similar cases or proceedings, and the opinions and views of legal counsel. Significant judgment is required in making these estimates and our final liabilities may ultimately be materially different.

Business Operations. We are involved in various lawsuits and disputes incidental to our business operations, including commercial disputes, personal injury claims, royalty claims, property damage claims and contract actions.

Regarding royalty claims, we and other natural gas producers have been named in various lawsuits alleging royalty underpayment. The suits against us allege, among other things, that we used below-market prices, made improper deductions, utilized improper measurement techniques entered into arrangements with affiliates that resulted in underpayment of royalties in connection with the production and sale of natural gas and NGL, or similar theories. These lawsuits include cases filed by individual royalty owners and putative class actions, some of which seek to certify a statewide class. The lawsuits seek compensatory, consequential, treble, and punitive damages, restitution and disgorgement of profits, declaratory and injunctive relief regarding our royalty payment practices, pre-and post-judgment interest, and attorney’s fees and costs. Plaintiffs have varying royalty provisions in their respective leases, oil and gas law varies from state to state, and royalty owners and producers differ in their interpretation of the legal effect of lease provisions governing royalty calculations. We have resolved a number of these claims through negotiated settlements of past and future royalty obligations and have prevailed in various other lawsuits. We are currently defending numerous lawsuits seeking damages with respect to underpayment of royalties in multiple states where we have operated, including those discussed below.

On December 9, 2015, the Commonwealth of Pennsylvania, by the Office of Attorney General, filed a lawsuit in the Bradford County Court of Common Pleas related to royalty underpayment and lease acquisition and accounting practices with respect to properties in Pennsylvania. The lawsuit, which primarily relates to the Marcellus Shale and Utica Shale, alleges that we violated the Pennsylvania Unfair Trade Practices and Consumer Protection Law (UTPCPL) by making improper deductions and entering into arrangements with affiliates that resulted in underpayment of royalties. The lawsuit includes other UTPCPL claims and antitrust claims, including that a joint exploration agreement to which we are a party established unlawful market allocation for the acquisition of leases. The lawsuit seeks statutory restitution, civil penalties and costs, as well as a temporary injunction from exploration and drilling activities in Pennsylvania until restitution, penalties and costs have been paid, and a permanent injunction from further violations of the UTPCPL.

Putative statewide class actions in Pennsylvania and Ohio and purported class arbitrations in Pennsylvania have been filed on behalf of royalty owners asserting various claims for damages related to alleged underpayment of royalties as a result of the divestiture of substantially all of our midstream business and most of our gathering assets in 2012 and 2013. These cases include claims for violation of and conspiracy to violate the federal Racketeer Influenced and Corrupt Organizations Act and for an unlawful market allocation agreement for mineral rights, intentional interference with contractual relations, and violations of antitrust laws related to purported markets for gas mineral rights, operating rights and gas gathering sources. These lawsuits seek in aggregate compensatory, consequential, treble, and punitive damages, restitution and disgorgement of profits, declaratory and injunctive relief regarding our royalty payment practices, pre-and post-judgment interest, and attorney’s fees and costs. On December 20, 2017 and August 9, 2018, we reached tentative settlements to resolve substantially all Pennsylvania civil royalty cases for a total of approximately $35 million.

We believe losses are reasonably possible in certain of the pending royalty cases for which we have not accrued a loss contingency, but we are currently unable to estimate an amount or range of loss or the impact the actions could have on our future results of operations or cash flows. Uncertainties in pending royalty cases generally include the complex nature of the claims and defenses, the potential size of the class in class actions, the scope and types of the properties and agreements involved, and the applicable production years.

We also previously disclosed defending lawsuits alleging various violations of the Sherman Antitrust Act and state antitrust laws. In 2016, putative class action lawsuits were filed in the U.S. District Court for the Western District of Oklahoma and in Oklahoma state courts, and an individual lawsuit was filed in the U.S. District Court of Kansas, in each case against us and other defendants. The lawsuits generally allege that, since 2007 and continuing through April 2013, the defendants conspired to rig bids and depress the market for the purchases of oil and natural gas leasehold interests and properties in the Anadarko Basin containing producing oil and natural gas wells. The lawsuits seek damages, attorney’s fees, costs and interest, as well as enjoinment from adopting practices or plans that would restrain competition in a similar manner as alleged in the lawsuits. On April 12, 2018, we reached a tentative settlement to resolve substantially all Oklahoma civil class action antitrust cases for an insignificant amount. The final fairness hearing is set for April 25, 2019.

On July 28, 2017, OOGC America LLC (OOGC) filed a demand for arbitration with the American Arbitration Association against Chesapeake Exploration, L.L.C., our wholly owned subsidiary, in connection with OOGC’s purchase of certain oil and gas leases and other assets pursuant to a Purchase and Sale Agreement entered into on October 10, 2010. In connection with the sale, we also entered into a Development Agreement with OOGC, dated November 15, 2010 (the “Development Agreement”), which governs each of our rights and obligations with respect to the sale, including the transportation and marketing of oil and gas. OOGC’s breach of contract, breach of agency and fiduciary duties and other claims generally allege, among other things, that we subjected OOGC to excessive rates for gathering and other services provided for under the Development Agreement and interfered with OOGC’s right to audit the documents that supported those rates. On November 13, 2018, a unanimous panel denied every claim asserted by OOGC other than OOGC being entitled to a declaration clarifying its audit rights.

On July 24, 2018, Healthcare of Ontario Pension Plan (HOOPP) filed a demand for arbitration with the American Arbitration Association regarding HOOPP’s purchase of our interest in Chaparral Energy, Inc. stock for $215 million on January 5, 2014. HOOPP claims that we engaged in material misrepresentations and fraud, and that we violated the Exchange Act and Oklahoma Uniform Securities Act. HOOPP seeks either rescission or $215 million in monetary damages, and in either case, interest, attorney’s fees, disgorgement and punitive damages. We intend to vigorously defend these claims.

In February 2019, a putative class action lawsuit in the District Court of Dallas County, Texas was filed against FTS International, Inc. (“FTSI”), certain investment banks, FTSI’s directors including certain of our officers and certain shareholders of FTSI including us. The lawsuit alleges various violations of Sections 11 (with respect to certain of our officers in their capacities as directors of FTSI) and 15 (with respect to such officers and us) of the Securities Act of 1933 in connection with public disclosure made during the initial public offering of FTSI. The suit seeks damages in excess of $1,000,000 and attorneys’ fees and other expenses. We intend to vigorously defend these claims.

Environmental Contingencies

The nature of the oil and gas business carries with it certain environmental risks for us and our subsidiaries. We have implemented various policies, programs, procedures, training and audits to reduce and mitigate such environmental risks. We conduct periodic reviews, on a company-wide basis, to assess changes in our environmental risk profile. Environmental reserves are established for environmental liabilities for which economic losses are probable and reasonably estimable. We manage our exposure to environmental liabilities in acquisitions by using an evaluation process that seeks to identify pre-existing contamination or compliance concerns and address the potential liability. Depending on the extent of an identified environmental concern, we may, among other things, exclude a property from the transaction, require the seller to remediate the property to our satisfaction in an acquisition or agree to assume liability for the remediation of the property.

We are named as a defendant in numerous lawsuits in Oklahoma alleging that we and other companies have engaged in activities that have caused earthquakes. These lawsuits seek compensation for injury to real and personal property, diminution of property value, economic losses due to business interruption, interference with the use and enjoyment of property, annoyance and inconvenience, personal injury and emotional distress. In addition, they seek the reimbursement of insurance premiums and the award of punitive damages, attorneys’ fees, costs, expenses and interest.

Other Matters

Based on management’s current assessment, we are of the opinion that no pending or threatened lawsuit or dispute relating to our business operations is likely to have a material adverse effect on our future consolidated financial position, results of operations or cash flows. The final resolution of such matters could exceed amounts accrued, however, and actual results could differ materially from management’s estimates.

Contingencies and Commitments

Commitments

Operating Leases

Future operating lease commitments related to other property and equipment are not recorded as obligations in the accompanying consolidated balance sheets. The aggregate undiscounted minimum future lease payments are presented below:



	December 31, 2018
	($ in millions)
2019	$	3
2020	1
Total	$	4

Operating lease expense for the years ended December 31, 2018, 2017 and 2016, was $4 million, $3 million and $5 million, respectively.

Gathering, Processing and Transportation Agreements

We have contractual commitments with midstream service companies and pipeline carriers for future gathering, processing and transportation of oil, natural gas and NGL to move certain of our production to market. Working interest owners and royalty interest owners, where appropriate, will be responsible for their proportionate share of these costs. Commitments related to gathering, processing and transportation agreements are not recorded as obligations in the accompanying consolidated balance sheets; however, they are reflected in our estimates of proved reserves.

The aggregate undiscounted commitments under our gathering, processing and transportation agreements, excluding any reimbursement from working interest and royalty interest owners, credits for third-party volumes or future costs under cost-of-service agreements, are presented below:



	December 31, 2018
	($ in millions)
2019	$	832
2020	774
2021	683
2022	581
2023	470
2024 – 2034	2,431
Total	$	5,771

In addition, we have entered into long-term agreements for certain natural gas gathering and related services within specified acreage dedication areas in exchange for cost-of-service based fees redetermined annually, or tiered fees based on volumes delivered relative to scheduled volumes. Future gathering fees may vary with the applicable agreement.

Service Contract

We have a contract with a third-party contractor to provide maintenance and other services to our natural gas compressors under capital lease. This commitment is not recorded as an obligation in the accompanying consolidated balance sheets. The aggregate undiscounted minimum future payments under this service contract is detailed below.



	December 31, 2018
	($ in millions)
2019	$	5
2020	5
2021	5
Total	$	15

Other Commitments

As part of our normal course of business, we enter into various agreements providing, or otherwise arranging for, financial or performance assurances to third parties on behalf of our wholly owned guarantor subsidiaries. These agreements may include future payment obligations or commitments regarding operational performance that effectively guarantee our subsidiaries’ future performance.

In connection with acquisitions and divestitures, our purchase and sale agreements generally provide indemnification to the counterparty for liabilities incurred as a result of a breach of a representation or warranty by the indemnifying party and/or other specified matters. These indemnifications generally have a discrete term and are intended to protect the parties against risks that are difficult to predict or cannot be quantified at the time of entering into or consummating a particular transaction. For divestitures of oil and natural gas properties, our purchase and sale agreements may require the return of a portion of the proceeds we receive as a result of uncured title or environmental defects.

While executing our strategic priorities, we have incurred certain cash charges, including contract termination charges, financing extinguishment costs and charges for unused natural gas transportation and gathering capacity.

Other Liabilities

12 Months Ended

Dec. 31, 2018

Other Liabilities Disclosure [Abstract]

Other Liabilities

Other current liabilities as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018		2017
	($ in millions)
Revenues and royalties due others	$	687	$	612
Accrued drilling and production costs	258		216
Joint interest prepayments received	73		74
VPP deferred revenue^(a)	59		63
Accrued compensation and benefits	202		214
Other accrued taxes	108		43
Other	212		296
Total other current liabilities	$	1,599	$	1,518

Other long-term liabilities as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018		2017
	($ in millions)
VPP deferred revenue^(a)	$	63	$	122
CHK Utica ORRI conveyance obligation^(b)	—		156
Unrecognized tax benefits	53		101
Other	103		97
Total other long-term liabilities	$	219	$	476

____________________________________________

(a)

At the inception of our volumetric production payment (VPP) agreements, we (i) removed the proved reserves associated with the VPP, (ii) recognized VPP proceeds as deferred revenue which are being amortized on a unit-of-production basis to other revenue over the term of the VPP, (iii) retained responsibility for the production costs and capital costs related to VPP interests and (iv) ceased recognizing production associated with the VPP volumes. The remaining deferred revenue balance will be recognized in other revenues in the consolidated statement of operations through 2021, assuming the related VPP production volumes are delivered as scheduled.

(b)

In 2018, we repurchased a previously conveyed ORRI from the CHK Utica, L.L.C. investors and extinguished our obligation to convey future ORRIs to the CHK Utica, L.L.C. investors for combined consideration of $199 million. The total CHK Utica ORRI conveyance obligation extinguished in 2018 was $183 million, of which $30 million was recorded in current liabilities and $153 million was recorded in long-term liabilities. The fair value of the consideration allocated to the extinguishment of liability, $122 million, was less than the carrying amount of the conveyance obligation and resulted in a gain of $61 million recognized in other income on our consolidated statement of operations. The fair value of the consideration allocated to the purchase of ORRIs on proved producing properties was $77 million and recorded in proved oil and natural gas properties in our consolidated balance sheet.

Capital Lease Obligation

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Capital Lease Obligation

In 2018, we sold our wholly owned subsidiary, Midcon Compression, L.L.C., to a third party and subsequently leased back some natural gas compressors for 38 months. The aggregate undiscounted minimum future lease payments are presented below:



	December 31, 2018
	($ in millions)
2019	$	10
2020	10
2021	10
Total minimum lease payments	30
Less imputed interest	(3		)
Present value of minimum lease payments	27
Less current maturities	(10		)
Present value of minimum lease payment, less current maturities	$	17

Revenue Recognition

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition

The FASB issued Revenue from Contracts with Customers (Topic 606) superseding virtually all existing revenue recognition guidance. We adopted this new standard in the first quarter of 2018 using the modified retrospective approach. We applied the new standard to all contracts that were not completed as of January 1, 2018 and reflected the aggregate effect of all modifications in determining and allocating the transaction price. The cumulative effect of adoption of $8 million did not have a material impact on our consolidated financial statements. However, the adoption did result in certain purchase and sale contracts being recorded on a net basis, as an agent, rather than on a gross basis, as principal, due to management’s evaluation under new considerations within Topic 606 that indicated we do not have control over the specified commodity in purchase and sale contracts with the same counterparty. Such presentation change did not have an impact on income (loss) from operations, earnings per share or cash flows.

In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statements of operations was as follows:



	Before adoption of ASC 606		Adjustments			As Reported
			($ in millions)
Statement of Operations for the Year Ended December 31, 2018
Marketing revenues	$	5,871	$	(795	)	$	5,076
Marketing operating expenses	$	5,953	$	(795	)	$	5,158

The following table shows revenue disaggregated by operating area and product type, for the year ended December 31, 2018:



	Year Ended December 31, 2018
	Oil		Natural Gas			NGL			Total
	($ in millions)
Marcellus	$	—	$	924		$	—		$	924
Haynesville	2		836			—			838
Eagle Ford	1,514		173			185			1,872
Powder River Basin	244		68			38			350
Mid-Continent	246		84			55			385
Utica	195		401			224			820
Revenue from contracts with customers	2,201		2,486			502			5,189
Gains (losses) on oil, natural gas and NGL derivatives	124		(147		)	(11		)	(34		)
Oil, natural gas and NGL revenue	$	2,325	$	2,339		$	491		$	5,155

Marketing revenue from contracts with customers	$	2,740	$	1,194		$	456		$	4,390
Other marketing revenue	457		229			—			686
Marketing revenue	$	3,197	$	1,423		$	456		$	5,076

Accounts Receivable

Accounts receivable as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018			2017
	($ in millions)
Oil, natural gas and NGL sales	$	976		$	959
Joint interest billings	211			209
Other	77			184
Allowance for doubtful accounts	(17		)	(30		)
Total accounts receivable, net	$	1,247		$	1,322

Income Taxes

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

The components of the income tax provision (benefit) for each of the periods presented below are as follows:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Current
Federal	$	—		$	(14	)	$	(14	)
State	—			5			(5		)
Current Income Taxes	—			(9		)	(19		)
Deferred
Federal	3			13			(147		)
State	(13		)	(2		)	(24		)
Deferred Income Taxes	(10		)	11			(171		)
Total	$	(10	)	$	2		$	(190	)

The effective income tax expense (benefit) differed from the computed "expected" federal income tax expense on earnings before income taxes for the following reasons:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Income tax expense (benefit) at the federal statutory rate (21%, 35%, 35%)	$	45		$	(175	)	$	(1,288	)
State income taxes (net of federal income tax benefit)	27			5			33
Remeasurement of deferred tax assets and liabilities	—			931			—
Change in valuation allowance	(97		)	(771		)	1,042
Other	15			12			23
Total	$	(10	)	$	2		$	(190	)

We applied the guidance in SAB 118 when accounting for the enactment-date effect of the Tax Act. At December 31, 2017, we had not completed our accounting for all of the enactment-date income tax effects of the Tax Act under ASC 740, Income Taxes, for certain items as we were waiting on additional guidance to be issued. At December 31, 2018, we have now completed our accounting for all of the enactment-date income tax effects of the Tax Act. The adjustments made during 2018 are considered immaterial but nevertheless are included as a component of income tax expense in our consolidated statement of operations for the year ended December 31, 2018, which is fully offset with an adjustment to the valuation allowance against our net deferred tax asset.

We reassessed the realizability of our deferred tax assets and continue to maintain a valuation allowance against all or substantially all of our net deferred tax asset. The $97 million net decrease in our valuation allowance is reflected as a component of income tax expense in our consolidated statement of operations for the year ended December 31, 2018. This decrease in the valuation allowance is primarily due to offsetting current year tax expense.

Deferred income taxes are provided to reflect temporary differences in the tax basis of assets and liabilities and their reported amounts in the financial statements. The tax-effected temporary differences, tax credits and net operating loss carryforwards that comprise our deferred taxes are as follows:



	Years Ended December 31,
	2018			2017
	($ in millions)
Deferred tax liabilities:
Property, plant and equipment	$	(976	)	$	(580	)
Volumetric production payments	(86		)	(83		)
Carrying value of debt	(95		)	—
Derivative instruments	(56		)	—
Other	(7		)	(20		)
Deferred tax liabilities	(1,220		)	(683		)

Deferred tax assets:
Net operating loss carryforwards	2,737			2,248
Carrying value of debt	—			161
Disallowed business interest carryforward	194			—
Asset retirement obligations	40			42
Investments	111			140
Derivative instruments	—			18
Accrued liabilities	89			125
Other	60			71
Deferred tax assets	3,231			2,805
Valuation allowance	(2,011		)	(2,119		)
Deferred tax assets after valuation allowance	1,220			686
Net deferred tax assets	$	—		$	3

As of December 31, 2018, we had federal NOL carryforwards of approximately $10.138 billion and state NOL carryforwards of approximately $10.688 billion, which excludes the NOL carryforwards related to unrecognized tax benefits. The associated deferred tax assets related to these federal and state NOL carryforwards were $2.129 billion and $608 million, respectively. The federal NOL carryforwards generated in tax years prior to 2018 expire between 2031 and 2037. As a result of the Tax Act, the 2018 federal NOL carryforward has no expiration. The value of these carryforwards depends on our ability to generate future taxable income. As of December 31, 2018 and 2017, we had deferred tax assets of $3.231 billion and $2.805 billion upon which we had a valuation allowance of $2.011 billion and $2.119 billion, respectively. Of the net change in the valuation allowance of $108 million for both federal and state deferred tax assets, $97 million is reflected as a component of income tax expense in the consolidated statement of operations and the remainder is reflected in components of stockholders’ equity.

A valuation allowance against deferred tax assets, including NOL carryforwards and disallowed business interest, is recognized when it is more likely than not that all or some portion of the benefit from the deferred tax assets will not be realized. To assess that likelihood, we use estimates and judgment regarding our future taxable income, and we consider the tax consequences in the jurisdiction where such taxable income is generated, to determine whether a valuation allowance is required. Such evidence can include our current financial position, our results of operations, both actual and forecasted, the reversal of existing taxable temporary differences, and tax planning strategies, as well as the current and forecasted business economics of our industry. Management assesses all available evidence, both positive and negative, to estimate whether sufficient future taxable income will be generated to permit the use of deferred tax assets. A significant piece of objectively verifiable negative evidence is the cumulative loss incurred over the three-year period ended December 31, 2018. Such objective negative evidence limits our ability to consider various forms of subjective positive evidence, such as our projections for future income. Accordingly, management has not changed its judgment for the period ended December 31, 2018 with respect to the need for a valuation allowance against all or substantially all of our net deferred tax asset position. The amount of the deferred tax asset considered realizable could be adjusted if projections of future taxable income are increased and/or if objective negative evidence in the form of cumulative losses is no longer present. Based on our current forecast, we may come out of a three-year cumulative loss position in the foreseeable future. Should we return to a level of sustained profitability, consideration will need to be given to future projections of taxable income to determine whether such projections provide an adequate source of taxable income for the realization of our deferred tax assets, namely federal NOL carryforwards and disallowed business interest carryforwards. If so, then all or a portion of the valuation allowance could possibly be released.

Our ability to utilize NOL carryforwards and possibly other tax attributes to reduce future federal taxable income and federal income tax is subject to various limitations under Section 382 of the Code. The utilization of these attributes may be limited upon the occurrence of certain ownership changes, including the issuance or exercise of rights to acquire stock, the purchase or sale of stock by 5% stockholders (as such shareholders are defined in Treasury regulations), and the offering of stock by us during any three-year period resulting in an aggregate change of more than 50% in the beneficial ownership of Chesapeake.

As of December 31, 2018, we do not believe that an ownership change has occurred that would limit the utilization of our NOL carryforwards and other tax attributes. Certain future transactions involving our equity (including relatively small transactions and transactions beyond our control) could cause an ownership change and therefore a limitation on the annual utilization of NOL carryforwards and possibly other tax attributes.

Accounting guidance for recognizing and measuring uncertain tax positions requires a more likely than not threshold condition be met on a tax position, based solely on the technical merits of being sustained, before any benefit of the tax position can be recognized in the financial statements. Guidance is also provided regarding de-recognition, classification and disclosure of uncertain tax positions. As of December 31, 2018 and 2017, the amount of unrecognized tax benefits related to NOL carryforwards and tax liabilities associated with uncertain tax positions was $79 million and $106 million, respectively. Of the 2018 amount, $32 million is related to state tax liabilities, $29 million is related to state tax receivables not expected to be recovered and the remainder is related to NOL carryforwards. Of the 2017 amount, $74 million is related to state tax liabilities, $4 million is related to federal tax liabilities and the remainder is related to NOL carryforwards. If recognized, $61 million of the uncertain tax positions identified would have an effect on the effective tax rate. No material changes to the current uncertain tax positions are expected within the next 12 months. As of December 31, 2018 and 2017, we had accrued liabilities of $20 million and $23 million, respectively, for interest related to these uncertain tax positions. We recognize interest related to uncertain tax positions as a component of interest expense. Penalties, if any, related to uncertain tax positions would be recorded in other expenses.

A reconciliation of the beginning and ending balances of unrecognized tax benefits is as follows:



	2018			2017			2016
	($ in millions)
Unrecognized tax benefits at beginning of period	$	106		$	202		$	280
Additions based on tax positions related to the current year	—			—			—
Additions to tax positions of prior years	—			4			33
Settlements	—			(100		)	(111		)
Expiration of the applicable statute of limitations	(23		)	—			—
Reductions to tax positions of prior years	(4		)	—			—
Unrecognized tax benefits at end of period	$	79		$	106		$	202

Our federal and state income tax returns are subject to examination by federal and state tax authorities. Federal examination cycles 2010 through 2013 and 2014 through 2015 were settled with the Internal Revenue Service (IRS) during the first and third quarters of 2018, respectively. However, certain of these tax years remain open for purposes of adjusting federal net operating loss carryforwards upon utilization. Tax years 2016 through 2018 remain open for all purposes of examination by the IRS. In addition, tax years 2016 through 2018 as well as certain earlier years remain open for examination by state tax authorities. Currently, several state examinations are in progress of various years. We do not anticipate that the outcome of any state audit will have a significant impact on our results of operations or financial position.

Related Parties Transactions	12 Months Ended
Related Parties Transactions	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Parties Transactions	Related Party Transactions Our equity method investees are considered related parties. Hydraulic fracturing and other services are provided to us in the ordinary course of business by our equity affiliate FTSI. As well operators, we are reimbursed by other working interest owners through the joint interest billing process for their proportionate share of these costs. For the years ended December 31, 2018, 2017 and 2016, our expenditures for hydraulic fracturing services with FTSI were $93 million, $111 million and $3 million, respectively.

Equity

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Equity

Common Stock

A summary of the changes in our common shares issued for the years ended December 31, 2018, 2017 and 2016 is detailed below:



	Years Ended December 31,
	2018	2017	2016
	(in thousands)
Shares issued as of January 1	908,733	896,279	664,796
Restricted stock issuances (net of forfeitures and cancellations)	4,983	2,488	1,945
Exchange/conversion of preferred stock	—	9,966	120,186
Exchange of convertible notes	—	—	55,428
Exchange of senior notes	—	—	53,924
Shares issued as of December 31	913,716	908,733	896,279

Preferred Stock

Following is a summary of our preferred stock, including the primary conversion terms as of December 31, 2018:



Preferred Stock Series	Issue Date	Liquidation Preference per Share		Holder's Conversion Right	Conversion Rate	Conversion Price		Company's Conversion Right From	Company's Market Conversion Trigger^(a)
5.75% cumulative convertible non-voting	May and June 2010	$	1,000	Any time	39.6858	$	25.1979	May 17, 2015	$	32.7573

5.75% (series A) cumulative convertible non-voting	May 2010	$	1,000	Any time	38.3508	$	26.0751	May 17, 2015	$	33.8976

4.50% cumulative convertible	September 2005	$	100	Any time	2.4561	$	40.7152	September 15, 2010	$	52.9298

5.00% cumulative convertible (series 2005B)	November 2005	$	100	Any time	2.7745	$	36.0431	November 15, 2010	$	46.8560

___________________________________________


(a)	Convertible at the Company's option if the trading price of the Company's common stock equals or exceeds the trigger price for a specified time period or after the applicable conversion date if there are less than 250,000 shares of 4.50% or 5.00% (Series 2005B) preferred stock outstanding or 25,000 shares of 5.75% or 5.75% (Series A) preferred stock outstanding.

Outstanding shares of our preferred stock for the years ended December 31, 2018, 2017 and 2016 are detailed below:



	5.75%		5.75% (Series A)		4.50%	5.00% (Series 2005B)
	(in thousands)
Shares outstanding as of January 1, 2018 and December 31, 2018	770		463		2,559	1,811

Shares outstanding as of January 1, 2017	843		476		2,559	1,962
Preferred stock conversions/exchanges^(a)	(73	)	(13	)	—	(151	)
Shares outstanding as of December 31, 2017	770		463		2,559	1,811

Shares outstanding as of January 1, 2016	1,497		1,100		2,559	2,096
Preferred stock conversions/exchanges^(b)	(654	)	(624	)	—	(134	)
Shares outstanding as of December 31, 2016	843		476		2,559	1,962

____________________________________________

(a)

During 2017, holders of our 5.75% Cumulative Convertible Preferred Stock exchanged 72,600 shares into 7,442,156 shares of common stock, holders of our 5.75% (Series A) Cumulative Convertible Preferred Stock exchanged 12,500 shares into 1,205,923 shares of common stock and holders of our 5.00% (Series 2005B) Cumulative Convertible Preferred Stock exchanged 150,948 shares into 1,317,756 shares of common stock. In connection with the exchanges, we recognized a loss equal to the excess of the fair value of all common stock issued in exchange for the preferred stock over the fair value of the common stock issuable pursuant to the original terms of the preferred stock. The loss of $41 million is reflected as a reduction to net income available to common stockholders for the purpose of calculating earnings per common share.

(b)

During 2016, holders of our 5.75% Cumulative Convertible Preferred Stock converted 653,872 shares into 59,141,429 shares of common stock, holders of our 5.75% (Series A) Cumulative Convertible Preferred Stock converted 624,137 shares into 60,032,734 shares of common stock and holders of our 5.00% (Series 2005B) Cumulative Convertible Preferred Stock exchanged or converted 134,000 shares into 1,012,032 shares of common stock. In connection with the exchanges noted above, we recognized a loss equal to the excess of the fair value of all common stock issued in exchange for the preferred stock over the fair value of the common stock issuable pursuant to the original terms of the preferred stock. The loss of $428 million is reflected as a reduction to net income available to common stockholders for the purpose of calculating earnings per common share.

Dividends

Dividends declared on our preferred stock are reflected as adjustments to retained earnings to the extent a surplus of retained earnings exists after giving effect to the dividends. To the extent retained earnings are insufficient to fund the distributions, payments are reflected in our financial statements as a return of contributed capital rather than earnings and are accounted for as a reduction to paid-in capital.

Dividends on our outstanding preferred stock are payable quarterly. We may pay dividends on our 5.00% Cumulative Convertible Preferred Stock (Series 2005B) and our 4.50% Cumulative Convertible Preferred Stock in cash, common stock or a combination thereof, at our option. Dividends on both series of our 5.75% Cumulative Convertible Non-Voting Preferred Stock are payable only in cash.

In January 2016, we suspended dividend payments on our convertible preferred stock to provide additional liquidity in the depressed commodity price environment. In the first quarter of 2017, we reinstated the payment of dividends on each series of our outstanding convertible preferred stock and paid our dividends in arrears.

Accumulated Other Comprehensive Income (Loss)

For the years ended December 31, 2018 and 2017, changes in accumulated other comprehensive income (loss) for cash flow hedges, net of tax, are detailed below:



	Years Ended December 31,
	2018			2017
	($ in millions)
Balance, as of January 1	$	(57	)	$	(96	)
Other comprehensive income before reclassifications	—			5
Amounts reclassified from accumulated other comprehensive income^(a)	34			34
Net other comprehensive income	34			39
Balance, as of December 31	$	(23	)	$	(57	)


(a)	Net losses on cash flow hedges for commodity contracts reclassified from accumulated other comprehensive income (loss), net of tax, to oil, natural gas and NGL revenues in the consolidated statements of operations.

Noncontrolling Interests

Chesapeake Granite Wash Trust. We own 23,750,000 common units in the Chesapeake Granite Wash Trust (the Trust) representing a 51% beneficial interest. We have determined that the Trust is a VIE and that we are the primary beneficiary. As a result, the Trust is included in our consolidated financial statements. As of December 31, 2018 and 2017, we had $41 million and $44 million, respectively, of noncontrolling interests on our consolidated balance sheets attributable to the Trust. Net income attributable to the Trust’s noncontrolling interest was $2 million, $3 million and $3 million for the years ended December 31, 2018, 2017 and 2016, respectively.

The Trust’s legal existence is separate from Chesapeake and our other consolidated subsidiaries, and the Trust is not a guarantor of any of Chesapeake’s debt. The creditors or beneficial holders of the Trust have no recourse to the general credit of Chesapeake. We have presented parenthetically on the face of the consolidated balance sheets the assets of the Trust that can be used only to settle obligations of the Trust and the liabilities of the Trust for which creditors do not have recourse to the general credit of Chesapeake.

Share-Based Compensation

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Our share-based compensation program consists of restricted stock, stock options, performance share units (PSUs) and cash restricted stock units (CRSUs) granted to employees and restricted stock granted to non-employee directors under our Long Term Incentive Plan. The restricted stock and stock options are equity-classified awards and the PSUs and CRSUs are liability-classified awards.

Share-Based Compensation Plans

2014 Long Term Incentive Plan. Our 2014 Long Term Incentive Plan (2014 LTIP), which is administered by the Compensation Committee of our Board of Directors, became effective on June 13, 2014 after it was approved by shareholders at our 2014 Annual Meeting. The 2014 LTIP replaced our Amended and Restated Long Term Incentive Plan which was adopted in 2005. The 2014 LTIP provides for up to 71,600,000 shares of common stock that may be issued as long-term incentive compensation to our employees and non-employee directors; provided, however, that the 2014 LTIP uses a fungible share pool under which (i) each share issued pursuant to a stock option or stock appreciation right (SAR) reduces the number of shares available under the 2014 LTIP by 1.0 share; (ii) each share issued pursuant to awards other than options and SARs reduces the number of shares available by 2.12 shares; (iii) if any awards of restricted stock under the 2014 LTIP, or its predecessor plan, are forfeited, expire, are settled for cash, or are tendered by the participant or withheld by us to satisfy any tax withholding obligation, then the shares subject to the award may be used again for awards; and (iv) PSUs and other performance awards which are payable solely in cash are not counted against the aggregate number of shares issuable. In addition, the 2014 LTIP prohibits the reuse of shares withheld or delivered to satisfy the exercise price of, or to satisfy tax withholding requirements for, an option or SAR. The 2014 LTIP also prohibits “net share counting” upon the exercise of options or SARs.

The 2014 LTIP authorizes the issuance of the following types of awards: (i) nonqualified and incentive stock options; (ii) SARs; (iii) restricted stock; (iv) performance awards, including PSUs; and (v) other stock-based awards. For both stock options and SARs, the exercise price may not be less than the fair market value of our common stock on the date of grant and the maximum exercise period may not exceed ten years from the date of grant. Awards granted under the plan vest at specified dates and/or upon the satisfaction of certain performance or other criteria, as determined by the Compensation Committee. As of December 31, 2018, 35,389,825 shares of common stock remained issuable under the 2014 LTIP.

Equity-Classified Awards

Restricted Stock. We grant restricted stock to employees and non-employee directors. A summary of the changes in unvested restricted stock during 2018, 2017 and 2016 is presented below:



	Shares of Unvested Restricted Stock		Weighted Average Grant Date Fair Value
	(in thousands)
Unvested restricted stock as of January 1, 2018	13,178		$	6.37
Granted	6,067		$	3.73
Vested	(5,808	)	$	7.67
Forfeited	(1,579	)	$	6.02
Unvested restricted stock as of December 31, 2018	11,858		$	4.43

Unvested restricted stock as of January 1, 2017	9,092		$	11.39
Granted	9,872		$	5.40
Vested	(4,573	)	$	13.73
Forfeited	(1,213	)	$	8.32
Unvested restricted stock as of December 31, 2017	13,178		$	6.37

Unvested restricted stock as of January 1, 2016	10,455		$	17.31
Granted	4,604		$	4.58
Vested	(4,692	)	$	17.23
Forfeited	(1,275	)	$	13.91
Unvested restricted stock as of December 31, 2016	9,092		$	11.39

The aggregate intrinsic value of restricted stock that vested during 2018 was approximately $20 million based on the stock price at the time of vesting.

As of December 31, 2018, there was approximately $33 million of total unrecognized compensation expense related to unvested restricted stock. The expense is expected to be recognized over a weighted average period of approximately 2.02 years.

Stock Options. In 2018, 2017 and 2016, we granted members of management stock options that vest ratably over a three-year period. Each stock option award has an exercise price equal to the closing price of our common stock on the grant date. Outstanding options expire seven years to ten years from the date of grant.

We utilize the Black-Scholes option pricing model to measure the fair value of stock options. The expected life of an option is determined using the simplified method. Volatility assumptions are estimated based on the average of historical volatility of Chesapeake stock over the expected life of an option. The risk-free interest rate is based on the U.S. Treasury rate in effect at the time of the grant over the expected life of the option. The dividend yield is based on an annual dividend yield, taking into account our dividend policy, over the expected life of the option. We used the following weighted average assumptions to estimate the grant date fair value of the stock options granted in 2018:



Expected option life – years	6.0
Volatility	63.55	%
Risk-free interest rate	2.72	%
Dividend yield	—	%

The following table provides information related to stock option activity for 2018, 2017 and 2016:



	Number of Shares Underlying Options		Weighted Average Exercise Price Per Share		Weighted Average Contract Life in Years	Aggregate Intrinsic Value^(a)
	(in thousands)					($ in millions)
Outstanding as of January 1, 2018	16,285		$	8.25	7.73	$	1
Granted	3,611		$	3.01
Exercised	—		$	—		$	—
Expired	(602	)	$	13.83
Forfeited	(1,198	)	$	5.45
Outstanding as of December 31, 2018	18,096		$	7.20	7.15	$	—
Exercisable as of December 31, 2018	8,250		$	10.73	5.73	$	—

Outstanding as of January 1, 2017	8,593		$	11.88	7.22	$	14
Granted	9,226		$	5.45
Exercised	—		$	—		$	—
Expired	(435	)	$	18.50
Forfeited	(1,099	)	$	9.12
Outstanding as of December 31, 2017	16,285		$	8.25	7.73	$	1
Exercisable as of December 31, 2017	4,474		$	15.15	5.26	$	—

Outstanding as of January 1, 2016	5,377		$	19.37	5.80	$	—
Granted	4,932		$	3.71
Exercised	—		$	—		$	—
Expired	(771	)	$	19.46
Forfeited	(945	)	$	5.66
Outstanding as of December 31, 2016	8,593		$	11.88	7.22	$	14
Exercisable as of December 31, 2016	2,844		$	19.60	5.53	$	—

___________________________________________


(a)	The intrinsic value of a stock option is the amount by which the current market value or the market value upon exercise of the underlying stock exceeds the exercise price of the option.

As of December 31, 2018, there was $13 million of total unrecognized compensation expense related to stock options. The expense is expected to be recognized over a weighted average period of approximately 1.56 years.

Restricted Stock and Stock Option Compensation. We recognized the following compensation costs, net of actual forfeitures, related to restricted stock and stock options for the years ended December 31, 2018, 2017 and 2016:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
General and administrative expenses	$	31	$	43	$	48
Oil and natural gas properties	2		5		6
Oil, natural gas and NGL production expenses	5		12		13
Exploration expenses	1		1		—
Marketing expenses	—		—		1
Total restricted stock and stock option compensation	$	39	$	61	$	68

Liability-Classified Awards

Performance Share Units. We granted PSUs to senior management that vest ratably over a three-year performance period and are settled in cash. The ultimate amount earned is based on achievement of performance metrics established by the Compensation Committee of the Board of Directors. Compensation expense associated with PSU awards is recognized over the service period based on the graded-vesting method. The value of the PSU awards at the end of each reporting period is dependent upon our estimates of the underlying performance measures.

For PSUs granted in 2017 and 2016, performance metrics include a total shareholder return (TSR) component, which can range from 0% to 100% and an operational performance component based on finding and development costs, which can range from 0% to 100%, resulting in a maximum payout of 200%. The payout percentage for the 2016 and 2017 PSU awards is capped at 100% if our absolute TSR is less than zero. The PSUs are settled in cash on the third anniversary of the awards. We utilized a Monte Carlo simulation for the TSR performance measure and the following assumptions to determine the grant date fair value and the reporting date fair value of the 2017 awards. The performance period for the 2016 awards ended on December 31, 2018 and the TSR component has been finalized.



Grant Date Assumptions
Assumption	2017 Awards
Volatility	80.65	%
Risk-free interest rate	1.54	%
Dividend yield for value of awards	—	%



Reporting Date Assumptions
Assumption	2017 Awards
Volatility	64.69	%
Risk-free interest rate	2.63	%
Dividend yield for value of awards	—	%

As the above assumptions and expected satisfaction of performance metrics change, the PSU liabilities will be adjusted quarterly through the end of the performance period.

For PSUs granted in 2018, performance metrics include an operational performance component based on a ratio of cumulative earnings before interest expense, income taxes, and depreciation, depletion and amortization expense (EBITDA) to capital expenditures, for which payout can range from 0% to 200%. The vested PSUs are settled in cash on each of the three annual vesting dates. We used the closing price of our common stock on the grant date to determine the grant date fair value of the PSUs. The PSU liability will be adjusted quarterly, based on changes in our stock price and expected satisfaction of performance metrics, through the end of each vesting period.

Cash Restricted Stock Units. In 2018, we granted CRSUs to employees that vest straight-line over a three-year period and are settled in cash on each of the three annual vesting dates. The ultimate amount earned is based on the closing price of our common stock on each of the vesting dates. We used the closing price of our common stock on the grant date to determine the grant date fair value of the CRSUs. The CRSU liability will be adjusted quarterly, based on changes in our stock price, through the end of each vesting period.

The following table presents a summary of our liability-classified awards:



		Grant Date Fair Value		December 31, 2018
	Units	Grant Date Fair Value		Fair Value		Vested Liability
		($ in millions)		($ in millions)
2018 PSU Awards:
Payable 2019, 2020 and 2021	3,959,647	$	12	$	11	$	—
2017 PSU Awards:
Payable 2020	1,217,774	$	8	$	3	$	1
2016 PSU Awards:
Payable 2019	2,348,893	$	10	$	6	$	4
2018 CRSU Awards:
Payable 2019, 2020 and 2021	15,189,197	$	46	$	32	$	—

We recognized the following compensation costs (credits), net of actual forfeitures, related to our liability-classified awards for the years ended December 31, 2018, 2017 and 2016:



	Years Ended December 31,
	2018		2017			2016
	($ in millions)
General and administrative expenses	$	9	$	(4	)	$	14
Oil and natural gas properties	1		—			—
Oil, natural gas and NGL production expenses	2		—			—
Restructuring and other termination costs	—		—			1
Total liability-classified awards compensation	$	12	$	(4	)	$	15

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Our qualified 401(k) profit sharing plan (401(k) Plan) is the Chesapeake Energy Corporation Savings and Incentive Stock Bonus Plan, which is open to employees of Chesapeake and all our subsidiaries. Eligible employees may elect to defer compensation through voluntary contributions to their 401(k) Plan accounts, subject to plan limits and those set by the IRS. We match employee contributions dollar for dollar (subject to a maximum contribution of 15% of an employee's base salary and performance bonus) in cash. We contributed $31 million, $35 million and $39 million to the 401(k) Plan in 2018, 2017 and 2016, respectively. We also maintain a nonqualified deferred compensation plan (DC Plan). To be eligible to participate in the DC Plan, an active employee must have a base salary of at least $150,000, have a hire date on or before December 1, immediately preceding the year in which the employee is able to participate, or be designated as eligible to participate. We match 100% of employee contributions up to 15% of base salary and performance bonus in the aggregate for the DC Plan with Chesapeake common stock, and an employee who is at least age 55 may elect for the matching contributions to be made in any one of the DC Plan’s investment options. The maximum compensation that can be deferred by employees under all of our deferred compensation plans, including the Chesapeake 401(k) Plan, is a total of 75% of base salary and 100% of performance bonus. The participant may choose separate deferral election percentages for both plans. We contributed $7 million, $8 million and $9 million to the DC Plan during 2018, 2017 and 2016, respectively, to fund the match. The deferred compensation company match of 15% has a five-year vesting schedule based on years of service. Any participant who is active on December 31 of the plan year will receive the deferred compensation company match which will be awarded on an annual basis. Any assets placed in trust by us to fund future obligations of our DC Plan are subject to the claims of creditors in the event of insolvency or bankruptcy, and participants are general creditors of the Company as to their deferred compensation in the plan.

Derivative and Hedging Activities

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative and Hedging Activities

We use derivative instruments to reduce our exposure to fluctuations in future commodity prices and to protect our expected operating cash flow against significant market movements or volatility. All of our oil, natural gas and NGL derivative instruments are net settled based on the difference between the fixed-price payment and the floating-price payment, resulting in a net amount due to or from the counterparty. None of our open oil, natural gas and NGL derivative instruments were designated for hedge accounting as of December 31, 2018 and 2017.

Oil, Natural Gas and NGL Derivatives

As of December 31, 2018 and 2017, our oil, natural gas and NGL derivative instruments consisted of the following types of instruments:


•	Swaps: We receive a fixed price and pay a floating market price to the counterparty for the hedged commodity. In exchange for higher fixed prices on certain of our swap trades, we may sell call options and call swaptions.


•	Options: We sell, and occasionally buy, call options in exchange for a premium. At the time of settlement, if the market price exceeds the fixed price of the call option, we pay the counterparty the excess on sold call options and we receive the excess on bought call options. If the market price settles below the fixed price of the call option, no payment is due from either party.


•	Call Swaptions: We sell call swaptions to counterparties in exchange for a premium that allow the counterparty, on a specific date, to extend an existing fixed-price swap for a certain period of time.

•

Collars: These instruments contain a fixed floor price (put) and ceiling price (call). If the market price exceeds the call strike price or falls below the put strike price, we receive the fixed price and pay the market price. If the market price is between the put and the call strike prices, no payments are due from either party. Three-way collars include the sale by us of an additional put option in exchange for a more favorable strike price on the call option. This eliminates the counterparty’s downside exposure below the second put option strike price.


•	Basis Protection Swaps: These instruments are arrangements that guarantee a fixed price differential to NYMEX from a specified delivery point. We receive the fixed price differential and pay the floating market price differential to the counterparty for the hedged commodity.

The estimated fair values of our oil, natural gas and NGL derivative instrument assets (liabilities) as of December 31, 2018 and 2017 are provided below:



	December 31, 2018				December 31, 2017
	Notional Volume	Fair Value			Notional Volume	Fair Value
		($ in millions)				($ in millions)
Oil (mmbbl):
Fixed-price swaps	12	$	157		21	$	(151	)
Collars	8	98			—	—
Three-way collars	—	—			2	(10		)
Call swaptions	—	—			2	(13		)
Basis protection swaps	7	5			11	(9		)
Total oil	27	260			36	(183		)
Natural gas (bcf):
Fixed-price swaps	623	26			532	149
Three-way collars	88	1			—	—
Collars	55	(3		)	47	11
Call options	44	—			110	(3		)
Call swaptions	106	(9		)	—	—
Basis protection swaps	50	—			65	(7		)
Total natural gas	966	15			754	150
NGL (mmgal):
Fixed-price swaps	—	—			33	(2		)
Contingent Consideration:
Utica divestiture		7				—
Total estimated fair value		$	282			$	(35	)

We have terminated certain commodity derivative contracts that were previously designated as cash flow hedges for which the original contract months are yet to occur. See further discussion below under Effect of Derivative Instruments – Accumulated Other Comprehensive Income (Loss).

Contingent Consideration Arrangements

In 2018, we sold our Utica Shale position to Encino. The agreement includes additional contingent payments to us of up to $100 million comprised of $50 million in consideration in each case if, on or prior to December 31, 2019, there is a period of twenty (20) trading days out of a period of thirty (30) consecutive trading days where (i) the average of the NYMEX natural gas strip prices for the months comprising the year 2022 equals or exceeds $3.00/mmbtu as calculated pursuant to the purchase agreement, and (ii) the average of the NYMEX natural gas strip price for the months comprising the year 2023 equals or exceeds $3.25/mmbtu as calculated pursuant to the purchase agreement. See Note 16 for further details regarding the transaction.

Foreign Currency Derivatives

During 2017, both our 6.25% Euro-denominated Senior Notes due 2017 and cross currency swaps for the same principal amount matured. Upon maturity of the notes, the counterparties paid us €246 million and we paid the counterparties $327 million. The terms of the cross currency swaps were based on the dollar/euro exchange rate on the issuance date of $1.3325 to €1.00. The swaps were designated as cash flow hedges and, because they were entirely effective in having eliminated any potential variability in our expected cash flows related to changes in foreign exchange rates, changes in their fair value did not impact earnings.

Supply Contract Derivatives

In 2016, we sold a long-term natural gas supply contract to a third party for cash proceeds of $146 million, which is included in marketing revenue as a realized gain. We reversed the cumulative unrealized gains, resulting in an unrealized loss of $297 million.

Effect of Derivative Instruments – Consolidated Balance Sheets

The following table presents the fair value and location of each classification of derivative instrument included in the consolidated balance sheets as of December 31, 2018 and 2017 on a gross basis and after same-counterparty netting:



Balance Sheet Classification	Gross Fair Value			Amounts Netted in the Consolidated Balance Sheets			Net Fair Value Presented in the Consolidated Balance Sheets
	($ in millions)
As of December 31, 2018
Commodity Contracts:
Short-term derivative asset	$	306		$	(104	)	$	202
Long-term derivative asset	117			(41		)	76
Short-term derivative liability	(107		)	104			(3		)
Long-term derivative liability	(41		)	41			—
Contingent Consideration:
Short-term derivative asset	7			—			7
Total derivatives	$	282		$	—		$	282

As of December 31, 2017
Commodity Contracts:
Short-term derivative asset	$	157		$	(130	)	$	27
Short-term derivative liability	(188		)	130			(58		)
Long-term derivative liability	(4		)	—			(4		)
Total derivatives	$	(35	)	$	—		$	(35	)

As of December 31, 2018 and 2017, we did not have any cash collateral balances for these derivatives.

Effect of Derivative Instruments – Consolidated Statements of Operations

The components of oil, natural gas and NGL revenues for the years ended December 31, 2018, 2017 and 2016 are presented below:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Oil, natural gas and NGL revenues	$	5,189		$	4,574		$	3,866
Gains (losses) on undesignated oil, natural gas and NGL derivatives	—			445			(545		)
Losses on terminated cash flow hedges	(34		)	(34		)	(33		)
Total oil, natural gas and NGL revenues	$	5,155		$	4,985		$	3,288

The components of marketing revenues for the years ended December 31, 2018, 2017 and 2016 are presented below:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Marketing revenues	$	5,069	$	4,511	$	4,881
Gains on undesignated marketing natural gas derivatives	7		—		—
Losses on undesignated supply contract derivatives	—		—		(297		)
Total marketing revenues	$	5,076	$	4,511	$	4,584

Gains as a result of changes in the fair value of our contingent consideration arrangements are recognized in loss on sale of oil and natural gas properties in the consolidated statement of operations.

Effect of Derivative Instruments – Accumulated Other Comprehensive Income (Loss)

A reconciliation of the changes in accumulated other comprehensive income (loss) in our consolidated statements of stockholders’ equity related to our cash flow hedges is presented below:



	Years Ended December 31,
	2018						2017						2016
	Before Tax			After Tax			Before Tax			After Tax			Before Tax			After Tax
	($ in millions)
Balance, beginning of period	$	(114	)	$	(57	)	$	(153	)	$	(96	)	$	(160	)	$	(99	)
Net change in fair value	—			—			5			5			(27		)	(13		)
Losses reclassified to income	34			34			34			34			34			16
Balance, end of period	$	(80	)	$	(23	)	$	(114	)	$	(57	)	$	(153	)	$	(96	)

The accumulated other comprehensive loss as of December 31, 2018 represents the net deferred loss associated with commodity derivative contracts that were previously designated as cash flow hedges for which the original contract months are yet to occur. Remaining deferred gain or loss amounts will be recognized in earnings in the month for which the original contract months are to occur. As of December 31, 2018, we expect to transfer approximately $34 million of net loss included in accumulated other comprehensive income to net income (loss) during the next 12 months. The remaining amounts will be transferred by December 31, 2022.

Credit Risk Considerations

Our derivative instruments expose us to our counterparties’ credit risk. To mitigate this risk, we enter into derivative contracts only with counterparties that are highly rated or deemed by us to have acceptable credit strength and deemed by management to be competent and competitive market-makers, and we attempt to limit our exposure to non-performance by any single counterparty. As of December 31, 2018, our oil, natural gas and NGL derivative instruments were spread among 11 counterparties.

Hedging Arrangements

Certain of our hedging arrangements are with counterparties that are also lenders (or affiliates of lenders) under the Chesapeake revolving credit facility. The contracts entered into with these counterparties are secured by the same collateral that secures the Chesapeake revolving credit facility. In addition, we enter into bilateral hedging agreements with other counterparties. The counterparties’ and our obligations under the bilateral hedging agreements must be secured by cash or letters of credit to the extent that any mark-to-market amounts owed to us or by us exceed defined thresholds. As of December 31, 2018, we posted an immaterial amount in letters of credit as collateral for our commodity derivatives. No cash was posted as collateral for our commodity derivatives.

Fair Value

The fair value of our derivatives is based on third-party pricing models which utilize inputs that are either readily available in the public market, such as oil, natural gas and NGL forward curves and discount rates, or can be corroborated from active markets or broker quotes. These values are compared to the values given by our counterparties for reasonableness. Since oil, natural gas and NGL swaps do not include optionality and therefore generally have no unobservable inputs, they are classified as Level 2. All other derivatives have some level of unobservable input, such as volatility curves, and are therefore classified as Level 3. Derivatives are also subject to the risk that either party to a contract will be unable to meet its obligations. We factor non-performance risk into the valuation of our derivatives using current published credit default swap rates. To date, this has not had a material impact on the values of our derivatives.

The following table provides information for financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
			($ in millions)
As of December 31, 2018
Derivative Assets (Liabilities):
Commodity assets	$	—	$	319		$	103		$	422
Commodity liabilities	—		(131		)	(16		)	(147		)
Utica divestiture contingent consideration	—		—			7			7
Total derivatives	$	—	$	188		$	94		$	282

As of December 31, 2017
Derivative Assets (Liabilities):
Commodity assets	$	—	$	—		$	8		$	8
Commodity liabilities	—		(20		)	(23		)	(43		)
Total derivatives	$	—	$	(20	)	$	(15	)	$	(35	)

A summary of the changes in the fair values of our financial assets (liabilities) classified as Level 3 during 2018 and 2017 is presented below:



	Commodity Derivatives			Utica Contingent Consideration
	($ in millions)
Balance, as of January 1, 2018	$	(15	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	77			7
Total purchases, issuances, sales and settlements:
Settlements	25			—
Balance, as of December 31, 2018	$	87		$	7

Balance, as of January 1, 2017	$	(10	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	2			—
Total purchases, issuances, sales and settlements:
Settlements	(7		)	—
Balance, as of December 31, 2017	$	(15	)	$	—

___________________________________________



(a)		Commodity Derivatives					Utica Contingent Consideration
		Commodity Derivatives					Utica Contingent Consideration
		2018		2017			2018		2017
		($ in millions)
	Total gains included in earnings for the period	$	77	$	2		$	7	$	—
	Change in unrealized gains (losses) related to assets still held at reporting date	$	86	$	(14	)	$	7	$	—

Qualitative and Quantitative Disclosures about Unobservable Inputs for Level 3 Fair Value Measurements

The significant unobservable inputs for Level 3 derivative contracts include market volatility. Changes in market volatility impact the fair value measurement of our derivative contracts, which is based on an estimate derived from option models. For example, an increase or decrease in the forward prices and volatility of oil and natural gas prices decreases or increases the fair value of oil and natural gas derivatives. The following table presents quantitative information about Level 3 inputs used in the fair value measurement of our commodity derivative contracts as of December 31, 2018:



Instrument Type	Unobservable Input	Range	Weighted Average	Fair Value December 31, 2018
				($ in millions)
Oil trades	Oil price volatility curves	23.70% – 42.17%	32.51%	$	98
Natural gas trades	Natural gas price volatility curves	12.88% – 90.93%	24.93%	$	(11	)
Utica contingent consideration	Natural gas price volatility curves	10.36% – 57.66%	—	$	7

Capitalized Exploratory Well Costs

12 Months Ended

Dec. 31, 2018

Extractive Industries [Abstract]

Capitalized Exploratory Well Costs

A summary of the changes in our capitalized well costs for the years ended December 31, 2018, 2017 and 2016 is detailed below. Additions pending the determination of proved reserves excludes amounts capitalized and subsequently charged to expense within the same year.



	2018			2017			2016
	(in millions)
Balance as of January 1	$	36		$	41		$	48
Additions pending the determination of proved reserves	74			14			15
Divestitures and other	—			—			—
Reclassifications to proved properties	(40		)	(19		)	(22		)
Charges to exploration expense	(34		)	—			—
Balance as of December 31	$	36		$	36		$	41

The following table provides an aging of capitalize costs and the number of projects for which exploratory well costs have been capitalized for a period greater than one year since the completion of drilling.



	2018		2017		2016
	(in millions)
Exploratory well costs capitalized for a period of one year or less	$	34	$	4	$	2
Exploratory well costs capitalized for a period greater than one year	2		32		39
Balance as of December 31	$	36	$	36	$	41

Number of projects with exploratory well costs capitalized for a period greater than one year	7		6		5

Oil and Natural Gas Property Transactions	12 Months Ended
Oil and Natural Gas Property Transactions	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Oil and Natural Gas Property Transactions	Oil and Natural Gas Property Transactions 2018 Transactions We sold all of our approximately 1,500,000 gross (900,000 net) acres in Ohio, of which approximately 320,000 net acres are prospective for the Utica Shale with approximately 920 producing wells, along with related property and equipment (collectively, the “Designated Properties”) for net proceeds of $1.868 billion to Encino, with additional contingent payments to us of up to $100 million comprised of $50 million in consideration in each case if, on or prior to December 31, 2019, there is a period of twenty (20) trading days out of a period of thirty (30) consecutive trading days where (i) the average of the NYMEX natural gas strip prices for the months comprising the year 2022 equals or exceeds $3.00/mmbtu as calculated pursuant to the purchase agreement, and (ii) the average of the NYMEX natural gas strip prices for the months comprising the year 2023 equals or exceeds $3.25/mmbtu as calculated pursuant to the purchase agreement. We recognized a loss of approximately $273 million associated with the transaction. In 2018, we sold portions of our acreage, producing properties and other related property and equipment in the Mid-Continent, including our Mississippian Lime assets, for approximately $491 million, subject to certain customary closing adjustments. Included in the sales were approximately 238,500 net acres and interests in approximately 3,200 wells. We recognized a gain of approximately $12 million associated with the transactions. Also, in 2018, we received proceeds of approximately $37 million subject to customary closing adjustments, for the sale of other oil and natural gas properties covering various operating areas. 2017 Transactions We sold portions of our acreage and producing properties in our Haynesville Shale operating area in northern Louisiana for approximately $915 million, subject to certain customary closing adjustments, and recognized a gain of approximately $326 million. Included in the sales were approximately 119,500 net acres and interests in 576 wells that were producing approximately 80 mmcf of gas per day at the time of closing. Also, in 2017, we received proceeds of approximately $350 million, net of post-closing adjustments, for the sale of other oil and natural gas properties covering various operating areas. 2016 Transactions We conveyed our interests in the Barnett Shale operating area located in north central Texas and received from the buyer aggregate net proceeds of approximately $218 million and recognized a gain of approximately $192 million associated with the transaction. We sold approximately 212,000 net developed and undeveloped acres along with other property and equipment. We simultaneously terminated most of our future commitments associated with this asset. In connection with this disposition, we paid $361 million to terminate certain natural gas gathering and transportation agreements and paid $58 million to restructure a long-term sales agreement. We recognized $361 million of expense for the termination of contracts and deferred charges of $58 million for the restructured contract. The deferred charges will be amortized to marketing, gathering and compression revenue over the life of the agreement. Additionally, we recognized a charge of $284 million in 2016 related to the impairment of other fixed assets sold in the divestiture. We sold the majority of our upstream and midstream assets in the Devonian Shale located in West Virginia, Kentucky and Virginia for proceeds of $140 million. We sold an interest in approximately 1.3 million net acres, retaining all rights below the base of the Kope formation, and approximately 5,300 wells along with related gathering assets, and other property and equipment. Additionally, we recognized an impairment charge of $142 million in 2016 related to other fixed assets sold in the divestiture. In connection with this divestiture, we purchased the underlying interests in one of our remaining VPP transactions for $127 million. All of the acquired interests were conveyed in our divestiture and we no longer have any future obligations related to this VPP. Inclusive of the VPP, we recognized a gain of approximately $47 million associated with the transaction. We acquired oil and natural gas properties in the Haynesville Shale for approximately $85 million. We sold certain of our other noncore oil and natural gas properties for net proceeds of approximately $1.048 billion, after post-closing adjustments. In conjunction with certain of these sales, we purchased oil and natural gas interests previously sold to third parties in connection with four of our VPP transactions for approximately $259 million. Substantially all of the acquired interests were part of the asset divestitures discussed above and we no longer have any further commitments or obligations related to these VPPs. The asset divestitures cover various operating areas. Inclusive of the VPPs, we recognized a gain of approximately $351 million associated with the transactions. Assets Held for Sale As of December 31 2017, we had $128 million of our assets located in the Mid-Continent that satisfied criteria to be considered held for sale. We sold these assets in 2018.

Other Property and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Other Property and Equipment

A summary of other property and equipment held for use and the estimated useful lives thereof is as follows:



	December 31,						Estimated Useful Life
	2018			2017			Estimated Useful Life
	($ in millions)						(in years)
Buildings and improvements	$	1,053		$	1,093		10 – 39
Computer equipment	353			345			5
Natural gas compressors^(a)	48			235			3 – 20
Land	106			126
Other	161			187			5 – 20
Total other property and equipment, at cost	1,721			1,986
Less: accumulated depreciation	(630		)	(672		)
Total other property and equipment, net	$	1,091		$	1,314

___________________________________________

(a) Includes assets under capital lease of $27 million, less accumulated depreciation of $1 million, as of December 31, 2018. The related amortization expense for assets under capital lease is included in depreciation, depletion and amortization expense on our consolidated statement of operations.

Investments	12 Months Ended
Investments	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investments	Investments In 2018, FTS International, Inc. (NYSE: FTSI) completed an initial public offering. Due to the offering, the ownership percentage of our equity method investment in FTSI decreased from approximately 29% to 24% and resulted in a gain of $78 million. In addition, we sold approximately 4.3 million shares of FTSI in the offering for net proceeds of approximately $74 million and recognized a gain of $61 million decreasing our ownership percentage to approximately 20%. We continue to hold approximately 22.0 million shares in the publicly traded company. In 2016, we recognized an other-than-temporary impairment of $119 million related to our Sundrop investment.

Impairments

12 Months Ended

Dec. 31, 2018

Asset Impairment Charges [Abstract]

Impairments

Impairments of Oil and Natural Gas Properties

A summary of our impairments of oil and natural gas properties for the years ended December 31, 2018, 2017 and 2016 is as follows:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Impairments due to lower forecasted commodity prices	$	23	$	27	$	73
Impairments due to reduction in future development^(a)	—		560		—
Impairments due to anticipated sale	55		222		29
Total impairments of oil and natural gas properties	$	78	$	809	$	102

(a) The impairment was the result of an updated development plan in 2017, which included a removal of PUDs from properties in the process of being divested in the Mid-Continent operating area.

Impairments of Fixed Assets

A summary of our impairments of fixed assets by asset class and other charges for the years ended December 31, 2018, 2017 and 2016 is as follows:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Natural gas compressors	$	45	$	—	$	21
Barnett Shale exit costs	—		—		284
Devonian Shale exit costs	—		—		142
Gathering systems	—		—		3
Buildings and land	4		5		11
Other	4		—		—
Total impairments of fixed assets and other	$	53	$	5	$	461

Natural Gas Compressors. In 2018, we recorded a $45 million impairment related to 890 compressors for the difference between carrying value and the fair value of the assets. In 2016, we recorded a $13 million impairment related to obsolescence of 205 compressors. Additionally in 2016, we recorded an $8 million impairment related to 155 compressors for the difference between the aggregate sales price and carrying value.

Barnett Shale Exit Costs. In 2016, we conveyed our interests in the Barnett Shale operating area located in north central Texas and recognized an impairment charge of $284 million related to other fixed assets sold in the divestiture.

Devonian Shale Exit Costs. In 2016, we sold the majority of our upstream and midstream assets in the Devonian Shale located in West Virginia and Kentucky. We recognized an impairment charge of $142 million in 2016 related to other fixed assets sold in the divestiture.

Nonrecurring Fair Value Measurements. Fair value measurements for certain of the impairments were based on recent sales information for comparable assets. As the fair value was estimated using the market approach based on recent prices from orderly sales transactions for comparable assets between market participants, these values were classified as Level 2 in the fair value hierarchy. Other inputs used were not observable in the market; these values were classified as Level 3 in the fair value hierarchy.

Other Operating Expenses	12 Months Ended
Other Operating Expenses	Dec. 31, 2018
Asset Impairment Charges [Abstract]
Other Operating Expenses	Other Operating Expense In 2017, we terminated future natural gas transportation commitments related to divested assets for cash payments of $126 million. Also in 2017, we paid $290 million to assign an oil transportation agreement to a third party. In 2016, we conveyed our interests in the Barnett Shale operating area located in north central Texas and simultaneously terminated most of our future commitments associated with this asset. As a result of this transaction, we recognized $361 million of charges related to the termination of natural gas gathering and transportation agreements.

Restructuring and Other Termination Costs

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Restructuring and Other Termination Costs

Workforce Reductions

In 2018, we underwent a reduction in workforce impacting approximately 13% of employees across all functions, primarily on our Oklahoma City campus. In connection with the reduction, we incurred a total charge of approximately $38 million for one-time termination benefits. The following table summarizes our restructuring liabilities:



	Other Current Liabilities
	($ in millions)
Balance as of December 31, 2017	$	—
Initial restructuring recognition on January 30, 2018	38
Termination benefits paid	(38		)
Balance as of December 31, 2018	$	—

In 2016, we recognized $6 million of charges related to a reduction in workforce in connection with the restructuring of our compressor manufacturing subsidiary and the reductions in workforce resulting from the conveyance of our interests in the Barnett Shale and Devonian Shale operating areas.

Fair Value Measurements

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Recurring Fair Value Measurements

Other Current Assets. Assets related to our deferred compensation plan are included in other current assets. The fair value of these assets is determined using quoted market prices as they consist of exchange-traded securities.

Other Current Liabilities. Liabilities related to our deferred compensation plan are included in other current liabilities. The fair values of these liabilities are determined using quoted market prices as the plan consists of exchange-traded mutual funds.

Financial Assets (Liabilities). The following table provides fair value measurement information for the above-noted financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
	($ in millions)
As of December 31, 2018
Financial Assets (Liabilities):
Other current assets	$	50		$	—	$	—	$	50
Other current liabilities	(51		)	—		—		(51		)
Total	$	(1	)	$	—	$	—	$	(1	)

As of December 31, 2017
Financial Assets (Liabilities):
Other current assets	$	57		$	—	$	—	$	57
Other current liabilities	(60		)	—		—		(60		)
Total	$	(3	)	$	—	$	—	$	(3	)

See Note 4 for information regarding fair value measurement of our debt instruments. See Note 14 for information regarding fair value measurement of our derivatives.

Nonrecurring Fair Value Measurements

See Note 19 regarding nonrecurring fair value measurements.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Asset Retirement Obligations

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

The components of the change in our asset retirement obligations are shown below:



	Years Ended December 31,
	2018			2017
	($ in millions)
Asset retirement obligations, beginning of period	$	177		$	261
Additions	3			5
Revisions	11			(34		)
Settlements and disposals	(35		)	(70		)
Accretion expense	10			15
Asset retirement obligations, end of period	166			177
Less current portion	11			15
Asset retirement obligation, long-term	$	155		$	162

Major Customers	12 Months Ended
Major Customers	Dec. 31, 2018
Segment Reporting [Abstract]
Major Customers	Major Customers Sales to Valero Energy Corporation constituted approximately 10% of our total revenues (before the effects of hedging for the year ended December 31, 2018. Sales to Royal Dutch Shell PLC constituted approximately 10% of our total revenues (before the effects of hedging) for the year ended December 31, 2017. Sales to BP PLC constituted approximately 10% of our total revenues (before the effects of hedging) for the years ended December 31, 2016.

Condensed Consolidating Financial Information

12 Months Ended

Dec. 31, 2018

Condensed Financial Information Disclosure [Abstract]

Condensed Consolidating Financial Information

Chesapeake Energy Corporation is a holding company, owns no operating assets and has no significant operations independent of its subsidiaries. Our obligations under our outstanding senior notes and contingent convertible senior notes listed in Note 4 are fully and unconditionally guaranteed, jointly and severally, by certain of our 100% owned subsidiaries on a senior unsecured basis. Subsidiaries with noncontrolling interests, consolidated variable interest entities and certain de minimis subsidiaries are non-guarantors.

The tables below are condensed consolidating financial statements for Chesapeake Energy Corporation (parent) on a stand-alone, unconsolidated basis, and its combined guarantor and combined non-guarantor subsidiaries as of December 31, 2018 and 2017 and for the years ended December 31, 2018 and 2017. This financial information may not necessarily be indicative of our results of operations, cash flows or financial position had these subsidiaries operated as independent entities.

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF DECEMBER 31, 2018

($ in millions)



	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
CURRENT ASSETS:
Cash and cash equivalents	$	4	$	1	$	1	$	(2	)	$	4
Other current assets	60		1,532		2		—			1,594
Intercompany receivable, net	6,671		—		—		(6,671		)	—
Total Current Assets	6,735		1,533		3		(6,673		)	1,598
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on successful efforts accounting, net	—		9,664		48		—			9,712
Other property and equipment, net	—		1,091		—		—			1,091
Property and equipment held for sale, net	—		15		—		—			15
Total Property and Equipment, Net	—		10,770		48		—			10,818
LONG-TERM ASSETS:
Other long-term assets	26		293		—		—			319
Investments in subsidiaries and intercompany advances	3,248		9		—		(3,257		)	—
TOTAL ASSETS	$	10,009	$	12,605	$	51	$	(9,930	)	$	12,735

CURRENT LIABILITIES:
Current liabilities	$	523	$	2,365	$	1	$	(2	)	$	2,887
Intercompany payable, net	—		6,671		—		(6,671		)	—
Total Current Liabilities	523		9,036		1		(6,673		)	2,887
LONG-TERM LIABILITIES:
Long-term debt, net	7,341		—		—		—			7,341
Other long-term liabilities	53		321		—		—			374
Total Long-Term Liabilities	7,394		321		—		—			7,715
EQUITY:
Chesapeake stockholders’ equity	2,092		3,248		9		(3,257		)	2,092
Noncontrolling interests	—		—		41		—			41
Total Equity	2,092		3,248		50		(3,257		)	2,133
TOTAL LIABILITIES AND EQUITY	$	10,009	$	12,605	$	51	$	(9,930	)	$	12,735

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF DECEMBER 31, 2017

($ in millions)



	Parent		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
CURRENT ASSETS:
Cash and cash equivalents	$	5	$	1		$	2		$	(3	)	$	5
Other current assets	154		1,365			3			(1		)	1,521
Intercompany receivable, net	8,699		434			—			(9,133		)	—
Total Current Assets	8,858		1,800			5			(9,137		)	1,526
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on successful efforts accounting, net	—		11,666			55			—			11,721
Other property and equipment, net	—		1,314			—			—			1,314
Property and equipment held for sale, net	—		144			—			—			144
Total Property and Equipment, Net	—		13,124			55			—			13,179
LONG-TERM ASSETS:
Other long-term assets	52		168			—			—			220
Investments in subsidiaries and intercompany advances	3,201		(38		)	—			(3,163		)	—
TOTAL ASSETS	$	12,111	$	15,054		$	60		$	(12,300	)	$	14,925

CURRENT LIABILITIES:
Current liabilities	$	190	$	2,231		$	2		$	(4	)	$	2,419
Intercompany payable, net	—		9,081			52			(9,133		)	—
Total Current Liabilities	190		11,312			54			(9,137		)	2,419
LONG-TERM LIABILITIES:
Long-term debt, net	9,921		—			—			—			9,921
Other long-term liabilities	101		541			—			—			642
Total Long-Term Liabilities	10,022		541			—			—			10,563
EQUITY:
Chesapeake stockholders’ equity (deficit)	1,899		3,201			(38		)	(3,163		)	1,899
Noncontrolling interests	—		—			44			—			44
Total Equity	1,899		3,201			6			(3,163		)	1,943
TOTAL LIABILITIES AND EQUITY	$	12,111	$	15,054		$	60		$	(12,300	)	$	14,925

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS

YEAR ENDED DECEMBER 31, 2018

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
REVENUES AND OTHER:
Oil, natural gas and NGL	$	—		$	5,136		$	19		$	—		$	5,155
Marketing	—			5,076			—			—			5,076
Total Revenues	—			10,212			19						10,231
Other	—			63			—			—			63
Losses on sales of assets	—			(264		)	—			—			(264		)
Total Revenues and Other	—			10,011			19			—			10,030
OPERATING EXPENSES:
Oil, natural gas and NGL production	—			539			—			—			539
Oil, natural gas and NGL gathering, processing and transportation	—			1,391			7			—			1,398
Production taxes	—			123			1			—			124
Exploration	—			162			—			—			162
Marketing	—			5,158			—			—			5,158
General and administrative	2			332			1			—			335
Restructuring and other termination costs	—			38			—			—			38
Provision for legal contingencies, net	—			26			—			—			26
Depreciation, depletion and amortization	—			1,730			7			—			1,737
Impairments	—			131			—			—			131
Total Operating Expenses	2			9,630			16			—			9,648
INCOME (LOSS) FROM OPERATIONS	(2		)	381			3			—			382
OTHER INCOME (EXPENSE):
Interest expense	(631		)	(2		)	—			—			(633		)
Gains on investments	—			139			—			—			139
Gains on purchases or exchanges of debt	263			—			—			—			263
Other income	3			64			—			—			67
Equity in net earnings of subsidiary	583			1			—			(584		)	—
Total Other Income (Expense)	218			202			—			(584		)	(164		)
INCOME BEFORE INCOME TAXES	216			583			3			(584		)	218
INCOME TAX BENEFIT	(10		)	—			—			—			(10		)
NET INCOME	226			583			3			(584		)	228
Net income attributable to noncontrolling interests	—			—			(2		)	—			(2		)
NET INCOME ATTRIBUTABLE TO CHESAPEAKE	226			583			1			(584		)	226
Other comprehensive income	—			34			—			—			34
COMPREHENSIVE INCOME ATTRIBUTABLE TO CHESAPEAKE	$	226		$	617		$	1		$	(584	)	$	260

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS

YEAR ENDED DECEMBER 31, 2017

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations		Consolidated
REVENUES AND OTHER:
Oil, natural gas and NGL	$	—		$	4,962		$	23		$	—	$	4,985
Marketing	—			4,511			—			—		4,511
Total Revenues	—			9,473			23			—		9,496
Other	—			67			—			—		67
Gains on sales of assets	—			476			—			—		476
Total Revenues and Other	—			10,016			23			—		10,039
OPERATING EXPENSES:
Oil, natural gas and NGL production	—			562			—			—		562
Oil, natural gas and NGL gathering, processing and transportation	—			1,463			8			—		1,471
Production taxes	—			88			1			—		89
Exploration	—			235			—			—		235
Marketing	—			4,598			—			—		4,598
General and administrative	1			330			2			—		333
Provision for legal contingencies, net	(79		)	41			—			—		(38		)
Depreciation, depletion and amortization	—			1,688			9			—		1,697
Impairments	—			814			—			—		814
Other operating expense	—			416			—			—		416
Total Operating Expenses	(78		)	10,235			20			—		10,177
INCOME (LOSS) FROM OPERATIONS	78			(219		)	3			—		(138		)
OTHER INCOME (EXPENSE):
Interest expense	(599		)	(2		)	—			—		(601		)
Gains on purchases or exchanges of debt	233			—			—			—		233
Other income	1			5			—			—		6
Equity in net earnings of subsidiary	(216		)	—			—			216		—
Total Other Income (Expense)	(581		)	3			—			216		(362		)
INCOME (LOSS) BEFORE INCOME TAXES	(503		)	(216		)	3			216		(500		)
INCOME TAX EXPENSE	2			—			—			—		2
NET INCOME (LOSS)	(505		)	(216		)	3			216		(502		)
Net income attributable to noncontrolling interests	—			—			(3		)	—		(3		)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	(505		)	(216		)	—			216		(505		)
Other comprehensive income	—			39			—			—		39
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	$	(505	)	$	(177	)	$	—		$	216	$	(466	)

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

YEAR ENDED DECEMBER 31, 2018

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By Operating Activities	$	85		$	1,642		$	10		$	(7	)	$	1,730

CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	—			(1,848		)	—			—			(1,848		)
Acquisitions of proved and unproved properties	—			(128		)	—			—			(128		)
Proceeds from divestitures of proved and unproved properties	—			2,231			—			—			2,231
Additions to other property and equipment	—			(21		)	—			—			(21		)
Proceeds from sales of other property and equipment	—			147			—			—			147
Proceeds from sales of investments	—			74			—			—			74
Net Cash Provided by Investing Activities	—			455			—			—			455

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	11,697			—			—			—			11,697
Payments on revolving credit facility borrowings	(12,059		)	—			—			—			(12,059		)
Proceeds from issuance of senior notes, net	1,236			—			—			—			1,236
Cash paid to purchase debt	(2,813		)	—			—			—			(2,813		)
Cash paid for preferred stock dividends	(92		)	—			—			—			(92		)
Other financing activities	(26		)	(123		)	(13		)	7			(155		)
Intercompany advances, net	1,971			(1,974		)	2			1			—
Net Cash Used In Financing Activities	(86		)	(2,097		)	(11		)	8			(2,186		)
Net decrease in cash and cash equivalents	(1		)	—			(1		)	1			(1		)
Cash and cash equivalents, beginning of period	5			1			2			(3		)	5
Cash and cash equivalents, end of period	$	4		$	1		$	1		$	(2	)	$	4

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

YEAR ENDED DECEMBER 31, 2017

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By Operating Activities	$	5		$	466		$	14		$	(10	)	$	475

CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	—			(2,113		)	—			—			(2,113		)
Acquisitions of proved and unproved properties	—			(88		)	—			—			(88		)
Proceeds from divestitures of proved and unproved properties	—			1,249			—			—			1,249
Additions to other property and equipment	—			(21		)	—			—			(21		)
Other investing activities	—			55			—			—			55
Net Cash Used In Investing Activities	—			(918		)	—			—			(918		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	7,771			—			—			—			7,771
Payments on revolving credit facility borrowings	(6,990		)	—			—			—			(6,990		)
Proceeds from issuance of senior notes, net	1,585			—			—			—			1,585
Cash paid to purchase debt	(2,592		)	—			—			—			(2,592		)
Cash paid for preferred stock dividends	(183		)	—			—			—			(183		)
Other financing activities	(39		)	(5		)	(13		)	32			(25		)
Intercompany advances, net	(456		)	456			—			—			—
Net Cash Provided by (Used In) Financing Activities	(904		)	451			(13		)	32			(434		)
Net increase (decrease) in cash and cash equivalents	(899		)	(1		)	1			22			(877		)
Cash and cash equivalents, beginning of period	904			2			1			(25		)	882
Cash and cash equivalents, end of period	$	5		$	1		$	2		$	(3	)	$	5

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 31, 2019, our shareholders approved a proposal to amend our restated certificate of incorporation to increase the number of authorized shares of our stock from 2,000,000,000 shares to 3,000,000,000 shares. On February 1, 2019, we acquired WildHorse Resource Development Corporation (“WildHorse”), an oil and gas company with operations in the Eagle Ford Shale and Austin Chalk formations in southeast Texas for approximately 717.3 million shares of our common stock and $381 million in cash, and the assumption of WildHorse’s debt of $1.4 billion as of February 1, 2019. We funded the cash portion of the consideration through borrowings under our revolving credit facility. On February 1, 2019, we entered into a first amendment (the “Chesapeake facility amendment”) to our Chesapeake revolving credit facility. Among other things, the Chesapeake facility amendment (i) designated Brazos Valley Longhorn and its subsidiaries as unrestricted subsidiaries under the Chesapeake revolving credit facility and (ii) expressly permitted our initial investment in WildHorse under the limitations on investments covenant. As a result of Brazos Valley Longhorn and its subsidiaries being designated as unrestricted subsidiaries under the Chesapeake revolving credit facility, transactions between Brazos Valley Longhorn and its subsidiaries, on the one hand, and Chesapeake and its subsidiaries other than Brazos Valley Longhorn, BVL Finance Corp. and the other BVL Guarantors, on the other hand, are required to be on an arm’s-length basis, subject to certain exceptions, and Chesapeake is limited in the amount of investments it can make in Brazos Valley Longhorn and its subsidiaries. On February 1, 2019, Brazos Valley Longhorn, as successor by merger to WildHorse, entered into a sixth amendment (the “WildHorse facility amendment”) to the Wildhorse revolving credit facility. Among other things, the WildHorse facility amendment (i) amended the merger covenant and the definition of change of control to permit our acquisition of WildHorse and (ii) permits borrowings under the WildHorse revolving credit facility to be used to redeem or repurchase the WildHorse senior notes so long as certain conditions are met. On February 1, 2019, Brazos Valley Longhorn, as successor by merger to WildHorse, and BVL Finance Corp., entered into a fourth supplemental indenture (the “WildHorse supplemental indenture”) to the WildHorse indenture. Pursuant to the Wildhorse supplemental indenture, (i) Brazos Valley Longhorn assumed the rights and obligations of WildHorse as issuer under the WildHorse indenture and (ii) BVL Finance Corp. was named as a co-issuer of the WildHorse senior notes under the WildHorse indenture. We will account for the WildHorse acquisition by applying the acquisition method of accounting, which requires the acquired assets and liabilities to be recorded at fair value as of the acquisition date.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements of Chesapeake were prepared in accordance with GAAP and include the accounts of our direct and indirect wholly owned subsidiaries and entities in which Chesapeake has a controlling financial interest. Intercompany accounts and balances have been eliminated.
Recast Financial Information for Change in Accounting Principle	Recast Financial Information for Change in Accounting Principle In the first quarter of 2019, we voluntarily changed our method of accounting for oil and natural gas exploration and development activities from the full cost method to the successful efforts method. Accordingly, financial information for prior periods presented herein has been recast to reflect retrospective application of the successful efforts method. Although the full cost method of accounting for oil and natural gas exploration and development activities continues to be an accepted alternative, the successful efforts method of accounting is the generally preferred method of the SEC and, because it is more widely used in the industry, we expect the change to improve the comparability of our financial statements to our peers. We also believe the successful efforts method provides a more representational depiction of assets and operating results and provides for our investments in oil and natural gas properties to be assessed for impairment in accordance with Accounting Standards Codification (ASC) Topic 360, Property Plant and Equipment, rather than valuations based on prices and costs prescribed under the full cost method as of the balance sheet date. For detailed information regarding the effects of the change to the successful efforts method, see Note 2.
Accounting Estimates	Accounting Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosures in the financial statements. Management evaluates its estimates and related assumptions regularly, including those related to the impairment of oil and natural gas properties, oil and natural gas reserves, derivatives, income taxes, unevaluated properties not subject to evaluation, impairment of other property and equipment, environmental remediation costs, asset retirement obligations, litigation and regulatory proceedings and fair values. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ significantly from these estimates.
Consolidation	Consolidation We consolidate entities in which we have a controlling financial interest. We consolidate subsidiaries in which we hold, directly or indirectly, more than 50% of the voting rights and variable interest entities (VIEs) in which we are the primary beneficiary. We consolidate a VIE when we are the primary beneficiary, which is the party that has both (i) the power to direct the activities that most significantly impact the VIE’s economic performance and (ii) through its interests in the VIE, the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. In order to determine whether we own a variable interest in a VIE, we perform a qualitative analysis of the entity’s design, organizational structure, primary decision makers and relevant agreements. We continually monitor our consolidated VIE to determine if any events have occurred that could cause the primary beneficiary to change. See Note 11 for further discussion of our VIE. We use the equity method of accounting to record our net interests where we have the ability to exercise significant influence through our investment but lack a controlling financial interest. Under the equity method, our share of net income (loss) is included in our consolidated statements of operations according to our equity ownership or according to the terms of the applicable governing instrument. Undivided interests in oil and natural gas properties are consolidated on a proportionate basis.
Segments	Segments Operating segments are defined as components of an enterprise that engage in activities from which it may earn revenues and incur expenses for which separate operational financial information is available and is regularly evaluated by the chief operating decision maker for the purpose of allocating an enterprise’s resources and assessing its operating performance. We have concluded that we have only one reportable operating segment, which is exploration and production because our marketing activities are ancillary to our operations.
Noncontrolling Interests	Noncontrolling Interests Noncontrolling interests represent third-party equity ownership in certain of our consolidated subsidiaries and are presented as a component of equity.
Cash and Cash Equivalents and Accounts Payable	Cash and Cash Equivalents For purposes of the consolidated financial statements, we consider investments in all highly liquid instruments with original maturities of three months or less at the date of purchase to be cash equivalents Accounts Payable Included in accounts payable as of December 31, 2018 and 2017 are liabilities of approximately $104 million and $92 million, respectively, representing the amount by which checks issued, but not yet presented to our banks for collection, exceeded balances in applicable bank accounts.
Accounts Receivable	Accounts Receivable Our accounts receivable are primarily from purchasers of oil, natural gas and NGL and from exploration and production companies that own interests in properties we operate. This industry concentration could affect our overall exposure to credit risk, either positively or negatively, because our purchasers and joint working interest owners may be similarly affected by changes in economic, industry or other conditions. We monitor the creditworthiness of all our counterparties and we generally require letters of credit or parent guarantees for receivables from parties deemed to have sub-standard credit, unless the credit risk can otherwise be mitigated. We utilize an allowance method in accounting for bad debt based on historical trends in addition to specifically identifying receivables that we believe may be uncollectible. See Note 8 for further discussion of our accounts receivable.
Oil and Gas Natural Properties	Oil and Natural Gas Properties We follow the successful efforts method of accounting for our oil and natural gas properties. Under this method, exploration costs such as exploratory geological and geophysical costs, expiration of unproved leasehold, delay rentals and exploration overhead are expensed as incurred. All costs related to production, general corporate overhead and similar activities are also expensed as incurred. All property acquisition costs and development costs are capitalized when incurred. Exploratory drilling costs are initially capitalized, or suspended, pending the determination of proved reserves. If proved reserves are found, drilling costs remain capitalized and are classified as proved properties. Costs of unsuccessful wells are charged to exploration expense. For exploratory wells that find reserves that cannot be classified as proved when drilling is completed, costs continue to be capitalized as suspended exploratory drilling costs if there have been sufficient reserves found to justify completion as a producing well and sufficient progress is being made in assessing the reserves and the economic and operational viability of the project. If we determine that future appraisal drilling or development activities are unlikely to occur, associated suspended exploratory well costs are expensed. In some instances, this determination may take longer than one year. We review the status of all suspended exploratory drilling costs quarterly. Costs to develop proved reserves, including the costs of all development wells and related equipment used in the production of oil and natural gas are capitalized. Costs of drilling and equipping successful wells, costs to construct or acquire facilities, and associated asset retirement costs are depreciated using the unit-of-production (UOP) method based on total estimated proved developed oil and gas reserves. Costs of acquiring proved properties, including leasehold acquisition costs transferred from unproved properties, are depleted using the UOP method based on total estimated proved developed and undeveloped reserves. Proceeds from the sales of individual oil and natural gas properties and the capitalized costs of individual properties sold or abandoned are credited and charged, respectively, to accumulated depreciation, depletion and amortization, if doing so does not materially impact the depletion rate of an amortization base. Generally, no gain or loss is recognized until an entire amortization base is sold. However, a gain or loss is recognized from the sale of less than an entire amortization base if the disposition is significant enough to materially impact the depletion rate of the remaining properties in the amortization base. When circumstances indicate that the carrying value of proved oil and gas properties may not be recoverable, we compare unamortized capitalized costs to the expected undiscounted pre-tax future cash flows for the associated assets grouped at the lowest level for which identifiable cash flows are independent of cash flows of other assets. If the expected undiscounted pre-tax future cash flows, based on our estimate of future crude oil and natural gas prices, operating costs, anticipated production from proved reserves and other relevant data, are lower than the unamortized capitalized costs, the capitalized costs are reduced to fair value. Fair value is generally estimated using the income approach described in the ASC 820, Fair Value Measurements. If applicable, we utilize prices and other relevant information generated by market transactions involving assets and liabilities that are identical or comparable to the item being measured as the basis for determining fair value. The expected future cash flows used for impairment reviews and related fair value measurements are typically based on judgmental assessments of future production volumes, commodity prices, operating costs, and capital investment plans, considering all available information at the date of review. These assumptions are applied to develop future cash flow projections that are then discounted to estimated fair value, using a discount rate believed to be consistent with those applied by market participants. We have classified these fair value measurements as Level 3 in the fair value hierarchy.
Other Property and Equipment	Other Property and Equipment Other property and equipment consists primarily of buildings and improvements, land, vehicles, computers, natural gas compressors under capital lease and office equipment. Major renewals and betterments are capitalized while the costs of repairs and maintenance are charged to expense as incurred. Other property and equipment costs, excluding land, are depreciated on a straight-line basis and recorded within depreciation, depletion and amortization in the consolidated statement of operations. Natural gas compressors under capital lease are depreciated over the shorter of their estimated useful lives or the term of the related lease. Realization of the carrying value of other property and equipment is reviewed for possible impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Assets are determined to be impaired if a forecast of undiscounted estimated future net operating cash flows directly related to the asset, including any disposal value, is less than the carrying amount of the asset. If any asset is determined to be impaired, the loss is measured as the amount by which the carrying amount of the asset exceeds its fair value. An estimate of fair value is based on the best information available, including prices for similar assets and discounted cash flow.
Capitalized Interest	Capitalized Interest Interest from external borrowings is capitalized on significant investments in major development projects until the asset is ready for service using the weighted average borrowing rate of outstanding borrowings. Capitalized interest is determined by multiplying our weighted average borrowing cost on debt by the average amount of qualifying costs incurred. Capitalized interest is depreciated over the useful lives of the assets in the same manner as the depreciation of the underlying asset.
Debt Issuance Costs	Debt Issuance Costs Included in other long-term assets are costs associated with the issuance and amendments of the Chesapeake revolving credit facility. The remaining unamortized issuance costs as of December 31, 2018 and 2017, totaled $30 million and $22 million, respectively, and are being amortized over the life of the Chesapeake revolving credit facility using the straight-line method. Included in debt are costs associated with the issuance of our senior notes. The remaining unamortized issuance costs as of December 31, 2018 and 2017, totaled $53 million and $63 million, respectively, and are being amortized over the life of the senior notes using the effective interest method.
Litigation Contingencies	Litigation Contingencies We are subject to litigation and regulatory proceedings, claims and liabilities that arise in the ordinary course of business. We accrue losses associated with litigation and regulatory claims when such losses are probable and reasonably estimable. If we determine that a loss is probable and cannot estimate a specific amount for that loss but can estimate a range of loss, our best estimate within the range is accrued. Estimates are adjusted as additional information becomes available or circumstances change. Legal defense costs associated with loss contingencies are expensed in the period incurred.
Environmental Remediation Costs	Environmental Remediation Costs We record environmental reserves for estimated remediation costs related to existing conditions from past operations when the responsibility to remediate is probable and the costs can be reasonably estimated. Expenditures that create future benefits or contribute to future revenue generation are capitalized.
Asset Retirement Obligations	Asset Retirement Obligations We recognize liabilities for obligations associated with the retirement of tangible long-lived assets that result from the acquisition, construction and development of the assets. We recognize the fair value of a liability for a retirement obligation in the period in which the liability is incurred. For oil and natural gas properties, this is the period in which an oil or natural gas well is acquired or drilled. The liability is then accreted each period until the liability is settled or the well is sold, at which time the liability is removed. The related asset retirement cost is capitalized as part of the carrying amount of our oil and natural gas properties. See Note 23 for further discussion of asset retirement obligations
Revenue Recognition	Revenue Recognition Revenue from the sale of oil, natural gas and NGL is recognized upon the transfer of control of the products, which is typically when the products are delivered to customers. Prior to the adoption of Revenue from Contracts with Customers (Topic 606) on January 1, 2018, revenue from the sale of oil, natural gas and NGL was recognized when title passed to customers. Revenue is recognized net of royalties due to third parties in an amount that reflects the consideration we expect to receive in exchange for those products. Revenue from contracts with customers includes the sale of our oil, natural gas and NGL production (recorded as oil, natural gas and NGL revenues in the consolidated statements of operations) as well as the sale of certain of our joint interest holders’ production which we purchase under joint operating arrangements (recorded in marketing revenues in the consolidated statements of operations). In connection with the marketing of these products, we obtain control of the oil, natural gas and NGL we purchase from other interest owners at defined delivery points and deliver the product to third parties, at which time revenues are recorded. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 days. There are no significant judgments that significantly affect the amount or timing of revenue from contracts with customers. We also earn revenue from other sources, including from a variety of derivative and hedging activities to reduce our exposure to fluctuations in future commodity prices and to protect our expected operating cash flow against significant market movements or volatility, (recorded within oil, natural gas and NGL revenues in the consolidated statements of operations) as well as a variety of oil, natural gas and NGL purchase and sale contracts with third parties for various commercial purposes, including credit risk mitigation and satisfaction of our pipeline delivery commitments (recorded within marketing revenues in the consolidated statements of operations). In circumstances where we act as an agent rather than a principal, our results of operations related to oil, natural gas and NGL marketing activities are presented on a net basis.
Fair Value Measurement	Fair Value Measurements Certain financial instruments are reported on a recurring basis at fair value on our consolidated balance sheets. We also use fair value measurements on a nonrecurring basis when a qualitative assessment of our assets indicates a potential impairment. Under fair value measurement accounting guidance, fair value is defined as the amount that would be received from the sale of an asset or paid for the transfer of a liability in an orderly transaction between market participants (i.e. an exit price). To estimate an exit price, a three-level hierarchy is used. The fair value hierarchy prioritizes the inputs, which refer broadly to assumptions market participants would use in pricing an asset or a liability, into three levels. Level 1 inputs are unadjusted quoted prices in active markets for identical assets and liabilities and have the highest priority. Level 2 inputs are inputs other than quoted prices within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability and have the lowest priority. The valuation techniques that may be used to measure fair value include a market approach, an income approach and a cost approach. A market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. An income approach uses valuation techniques to convert future amounts to a single present amount based on current market expectations, including present value techniques, option-pricing models and the excess earnings method. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). The carrying values of financial instruments comprising cash and cash equivalents, accounts payable and accounts receivable approximate fair values due to the short-term maturities of these instruments.
Derivatives	Derivatives Derivative instruments are recorded at fair value, and changes in fair value are recognized currently in earnings unless specific hedge accounting criteria are followed. As of December 31, 2018, none of our open derivative instruments were designated as cash flow hedges. Derivative instruments reflected as current in the consolidated balance sheets represent the estimated fair value of derivatives scheduled to settle over the next twelve months based on market prices/rates as of the respective balance sheet dates. Cash settlements of our derivative instruments are generally classified as operating cash flows unless the derivatives are deemed to contain, for accounting purposes, a significant financing element at contract inception, in which case these cash settlements are classified as financing cash flows in the accompanying consolidated statement of cash flows. All of our derivative instruments are subject to master netting arrangements by contract type which provide for the offsetting of asset and liability positions within each contract type, as well as related cash collateral if applicable, by counterparty. Therefore, we net the value of our derivative instruments by contract type with the same counterparty in the accompanying consolidated balance sheets. We have established the fair value of our derivative instruments using established index prices, volatility curves and discount factors. These estimates are compared to our counterparty values for reasonableness. The values we report in our financial statements are as of a point in time and subsequently change as these estimates are revised to reflect actual results, changes in market conditions and other factors. Derivative transactions are subject to the risk that counterparties will be unable to meet their obligations. This non-performance risk is considered in the valuation of our derivative instruments, but to date has not had a material impact on the values of our derivatives.
Share-Based Compensation	Share-Based Compensation Our share-based compensation program consists of restricted stock, stock options, performance share units and cash restricted stock units granted to employees and restricted stock granted to non-employee directors under our Long Term Incentive Plan. We recognize the cost of employee services received in exchange for restricted stock and stock options based on the fair value of the equity instruments as of the grant date. For employees, this value is amortized over the vesting period, which is generally three years from the grant date. For directors, although restricted stock grants vest over three years, this value is recognized immediately as there is a non-substantive service condition for vesting. Because performance share units are settled in cash, they are classified as a liability in our consolidated financial statements and are measured at fair value as of the grant date and re-measured at fair value at the end of each reporting period. These fair value adjustments are recognized as general and administrative expense in the consolidated statements of operations. To the extent compensation expense relates to employees directly involved in the acquisition of oil and natural gas leasehold and development activities, these amounts are capitalized to oil and natural gas properties. Amounts not capitalized to oil and natural gas properties are recognized as general and administrative expense, oil, natural gas and NGL production expense, exploration expense, or marketing expense, based on the employees involved in those activities.
Recently Issued Accounting Standards	Recently Issued Accounting Standards The Financial Accounting Standards Board (FASB) issued Topic 606 superseding virtually all existing revenue recognition guidance. We adopted this new standard in the first quarter of 2018 using the modified retrospective approach. See Note 8 for further details regarding our adoption of Topic 606. In February 2018, the FASB issued Accounting Standards Update (ASU) 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The new standard allows for stranded tax effects resulting from the tax reform legislation commonly known as the Tax Cuts and Jobs Act, which was signed into law on December 22, 2017 (the “Tax Act”), previously recognized in accumulated other comprehensive income to be reclassified to retained earnings. For public business entities, the amendments are effective for annual periods, including interim periods within the annual periods, beginning after December 15, 2018. This standard is effective for us beginning on January 1, 2019, and we will elect not to reclassify the income tax effects of the Tax Act from accumulated other comprehensive income to retained earnings. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), which makes significant changes to the current hedge accounting guidance. The new standard eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The new standard also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. The new standard update is effective for annual and interim periods beginning after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, but we do not plan to early adopt. We plan to adopt this standard on January 1, 2019 and do not expect it to have an impact on our consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires lessees to recognize a lease liability and a right-of-use (ROU) asset on the balance sheet for all leases, including operating leases, with terms in excess of 12 months. This ASU modifies the definition of a lease and outlines the recognition, measurement, presentation, and disclosure of leasing arrangements by both lessees and lessors. The standard will not apply to our leases of mineral rights to explore for or use oil and natural gas resources, including the intangible rights to explore for those natural resources and rights to use the land in which those natural resources are contained. We plan to make certain elections permitting us to not reassess whether any expired or existing contracts contained leases, permitting us to not reassess the lease classification for any expired or existing leases (all existing leases that were classified as operating leases in accordance with Topic 840 will be classified as operating leases, and all existing leases that were classified as capital leases in accordance with Topic 840 will be classified as finance leases), and permitting us to not reassess initial direct costs for any existing leases. We will also take an election permitting us to continue applying our current policy for land easements that existed as of, or expired before, the effective date and to not recognize a ROU asset or lease liability for short-term leases. We have completed our assessment of contracts potentially affected by the new standard and have completed our assessment of the accounting treatment for these leases. The adoption will primarily impact other assets and other liabilities and will also impact ongoing disclosures but will not have a material impact on our balance sheet, results of operations or cash flows. We plan to adopt the new standard on January 1, 2019, the effective date, and as permitted by ASU 2018-11 we will not adjust comparative-period financial statements and will continue to apply the guidance in ASC 840, including its disclosure requirements, in the comparative periods presented prior to adoption.
Reclassifications	Reclassifications Certain reclassifications have been made to the consolidated financial statements for 2017 and 2016 to conform to the presentation used for the 2018 consolidated financial statements.

Change in Accounting Principle (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Changes and Error Corrections [Abstract]

Schedule of changes in accounting principles



	December 31, 2018
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	69,642		$	(44,235	)	$	25,407
Unproved properties	$	2,337		$	(776	)	$	1,561
Total Property and Equipment, at Cost	$	73,700		$	(45,011	)	$	28,689
Less: accumulated depreciation, depletion and amortization (($461) and ($707) attributable to our VIE)	$	(64,685	)	$	46,799		$	(17,886	)
Total Property and Equipment, Net	$	9,030		$	1,788		$	10,818
Total Assets	$	10,947		$	1,788		$	12,735
Other current liabilities	$	1,540		$	59		$	1,599
Other long-term liabilities	$	156		$	63		$	219
Total long-term liabilities	$	7,652		$	63		$	7,715
Accumulated deficit	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake Stockholders’ Equity	$	344		$	1,748		$	2,092
Noncontrolling interests	$	123		$	(82	)	$	41
Total Equity	$	467		$	1,666		$	2,133
Total Liabilities and Equity	$	10,947		$	1,788		$	12,735



	December 31, 2017
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other current assets	$	171		$	1		$	172
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	68,858		$	(40,926	)	$	27,932
Unproved properties	$	3,484		$	(1,460	)	$	2,024
Total Property and Equipment, at Cost	$	74,328		$	(42,386	)	$	31,942
Less: accumulated depreciation, depletion and amortization (($461) and ($700) attributable to our VIE)	$	(63,664	)	$	44,757		$	(18,907	)
Property and equipment held for sale, net	$	16		$	128		$	144
Total Property and Equipment, Net	$	10,680		$	2,499		$	13,179
Total Assets	$	12,425		$	2,500		$	14,925
Other current liabilities	$	1,455		$	63		$	1,518
Other long-term liabilities	$	354		$	122		$	476
Total long-term liabilities	$	10,441		$	122		$	10,563
Accumulated deficit	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake Stockholders’ Equity (Deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests	$	124		$	(80	)	$	44
Total Equity (Deficit)	$	(372	)	$	2,315		$	1,943
Total Liabilities and Equity	$	12,425		$	2,500		$	14,925



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	63		$	63
Loss on sale of assets	$	—		$	(264	)	$	(264	)
Total revenues	$	10,231		$	(201	)	$	10,030
Exploration expense	$	—		$	162		$	162
General and administrative	$	280		$	55		$	335
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and natural gas properties	$	578		$	(578	)	$	—
Impairments	$	53		$	78		$	131
Other operating expenses	$	10		$	(10	)	$	—
Total operating expenses	$	9,349		$	299		$	9,648
Income (loss) from operations	$	882		$	(500	)	$	382
Interest expense	$	(487	)	$	(146	)	$	(633	)
Other income	$	70		$	(3	)	$	67
Total other expense	$	(15	)	$	(149	)	$	(164	)
Income (loss) before income taxes	$	867		$	(649	)	$	218
Net income (loss)	$	877		$	(649	)	$	228
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	2		$	(2	)
Net income (loss) attributable to Chesapeake	$	873		$	(647	)	$	226
Earnings allocated to participating securities	$	(6	)	$	5		$	(1	)
Net income (loss) available to common stockholders	$	775		$	(642	)	$	133
Earnings (loss) per common share basic	$	0.85		$	(0.70	)	$	0.15
Earnings (loss) per common share diluted	$	0.85		$	(0.70	)	$	0.15



	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	67		$	67
Gain on sales of assets	$	—		$	476		$	476
Total revenues	$	9,496		$	543		$	10,039
Exploration expense	$	—		$	235		$	235
General and administrative	$	262		$	71		$	333
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Impairments	$	5		$	809		$	814
Other operating expenses	$	413		$	3		$	416
Total operating expenses	$	8,357		$	1,820		$	10,177
Income (loss) from operations	$	1,139		$	(1,277	)	$	(138	)
Interest expense	$	(426	)	$	(175	)	$	(601	)
Other income	$	9		$	(3	)	$	6
Total other expense	$	(184	)	$	(178	)	$	(362	)
Income (loss) before income taxes	$	955		$	(1,455	)	$	(500	)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	1		$	(3	)
Net income (loss) attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Earnings allocated to participating securities	$	(10	)	$	10		$	—
Net income (loss) available to common stockholders	$	813		$	(1,444	)	$	(631	)
Earnings (loss) per common share basic	$	0.90		$	(1.60	)	$	(0.70	)
Earnings (loss) per common share diluted	$	0.90		$	(1.60	)	$	(0.70	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	207		$	207
Gain on sales of assets	$	—		$	626		$	626
Total revenues	$	7,872		$	833		$	8,705
Exploration expense	$	—		$	1,455		$	1,455
General and administrative	$	240		$	82		$	322
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Impairments	$	3,025		$	(2,462	)	$	563
Other operating expenses	$	365		$	12		$	377
Total operating expenses	$	12,283		$	(322	)	$	11,961
Income (loss) from operations	$	(4,411	)	$	1,155		$	(3,256	)
Interest expense	$	(296	)	$	(232	)	$	(528	)
Other income	$	19		$	(14	)	$	5
Total other expense	$	(178	)	$	(246	)	$	(424	)
Income (loss) before income taxes	$	(4,589	)	$	909		$	(3,680	)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Net (income) loss attributable to noncontrolling interest	$	9		$	(12	)	$	(3	)
Net income (loss) attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Net income (loss) available to common stockholders	$	(4,915	)	$	897		$	(4,018	)
Earnings (loss) per common share basic	$	(6.43	)	$	1.17		$	(5.26	)
Earnings (loss) per common share diluted	$	(6.43	)	$	1.17		$	(5.26	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	877		$	(649	)	$	228
Comprehensive income (loss)	$	911		$	(649	)	$	262
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	2		$	(2	)
Comprehensive income (loss) attributable to Chesapeake	$	907		$	(647	)	$	260

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Comprehensive income (loss)	$	992		$	(1,455	)	$	(463	)
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	1		$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	988		$	(1,454	)	$	(466	)

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Comprehensive income (loss)	$	(4,396	)	$	909		$	(3,487	)
Comprehensive (income) loss attributable to noncontrolling interests	$	9		$	(12	)	$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	(4,387	)	$	897		$	(3,490	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income	$	877		$	(649	)	$	228
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and gas properties	$	578		$	(578	)	$	—
Losses on sales of assets	$	—		$	264		$	264
Impairments	$	53		$	78		$	131
Exploratory dry hole expense and leasehold impairments	$	—		$	96		$	96
Other	$	(108	)	$	(10	)	$	(118	)
Increase in accounts payable, accrued liabilities and other	$	138		$	(63	)	$	75
Net cash provided by operating activities	$	2,000		$	(270	)	$	1,730
Drilling and completion costs	$	(1,958	)	$	110		$	(1,848	)
Acquisition of proved and unproved properties	$	(288	)	$	160		$	(128	)
Net cash provided by investing activities	$	185		$	270		$	455

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Gains on sales of assets	$	—		$	(476	)	$	(476	)
Impairments	$	5		$	809		$	814
Exploratory dry hole expense and leasehold impairments	$	—		$	214		$	214
Other	$	(135	)	$	3		$	(132	)
Decrease in accounts payable, accrued liabilities and other	$	(308	)	$	(67	)	$	(375	)
Net cash provided by operating activities	$	745		$	(270	)	$	475
Drilling and completion costs	$	(2,186	)	$	73		$	(2,113	)
Acquisition of proved and unproved properties	$	(285	)	$	197		$	(88	)
Net cash used in investing activities	$	(1,188	)	$	270		$	(918	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net loss	$	(4,399	)	$	909		$	(3,490	)
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Gain on sales of assets	$	—		$	(212	)	$	(212	)
Impairments	$	3,025		$	(2,462	)	$	563
Exploratory dry hole expense and leasehold impairments	$	—		$	1,387		$	1,387
Other	$	(145	)	$	18		$	(127	)
Decrease in accounts payable, accrued liabilities and other	$	(757	)	$	(1,007	)	$	(1,764	)
Net cash used in operating activities	$	(204	)	$	(776	)	$	(980	)
Drilling and completion costs	$	(1,295	)	$	103		$	(1,192	)
Acquisition of proved and unproved properties	$	(788	)	$	673		$	(115	)
Net cash provided by (used in) investing activities	$	(660	)	$	776		$	116



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(16,525	)	$	2,395		$	(14,130	)
Net income attributable to Chesapeake	$	873		$	(647	)	$	226
Accumulated deficit, end of period	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake stockholders’ equity (deficit)	$	344		$	1,748		$	2,092
Noncontrolling interests, beginning of period	$	124		$	(80	)	$	44
Net income (loss) attributable to noncontrolling interests	$	4		$	(2	)	$	2
Noncontrolling interests, end of period	$	123		$	(82	)	$	41
Total equity (deficit)	$	467		$	1,666		$	2,133

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(17,474	)	$	3,849		$	(13,625	)
Net income attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Accumulated deficit, end of period	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake stockholders’ equity (deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests, beginning of period	$	128		$	(79	)	$	49
Net income (loss) attributable to noncontrolling interests	$	4		$	(1	)	$	3
Noncontrolling interests, end of period	$	124		$	(80	)	$	44
Total equity (deficit)	$	(372	)	$	2,315		$	1,943

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Cumulative effect of change in accounting principle	$	—		$	2,952		$	2,952
Accumulated deficit, end of period	$	(17,474	)	$	3,849		$	(13,625	)
Total Chesapeake stockholders’ equity (deficit)	$	(1,331	)	$	3,849		$	2,518
Noncontrolling interests, beginning of period	$	141		$	—		$	141
Net income (loss) attributable to noncontrolling interests	$	(9	)	$	12		$	3
Cumulative effect of change in accounting principle	$	—		$	(91	)	$	(91	)
Noncontrolling interests, end of period	$	128		$	(79	)	$	49
Total equity (deficit)	$	(1,203	)	$	3,770		$	2,567

In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statements of operations was as follows:



	Before adoption of ASC 606		Adjustments			As Reported
			($ in millions)
Statement of Operations for the Year Ended December 31, 2018
Marketing revenues	$	5,871	$	(795	)	$	5,076
Marketing operating expenses	$	5,953	$	(795	)	$	5,158

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]

Schedule of dilutive securities excluded from calculation of diluted EPS

Shares of common stock for the following dilutive securities were excluded from the calculation of diluted EPS as the effect was antidilutive.



	Years Ended December 31,
	2018	2017	2016
	(in millions)
Common stock equivalent of our preferred stock outstanding	60	60	63
Common stock equivalent of our convertible senior notes outstanding	146	146	146
Common stock equivalent of our preferred stock outstanding prior to exchange	—	1	37
Participating securities	1	1	1

Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of long-term debt

Our long-term debt consisted of the following as of December 31, 2018 and 2017:



	December 31, 2018						December 31, 2017
	Principal Amount			Carrying Amount			Principal Amount			Carrying Amount
	($ in millions)
7.25% senior notes due 2018	—			—			44			44
Floating rate senior notes due 2019	380			380			380			380
6.625% senior notes due 2020	437			437			437			437
6.875% senior notes due 2020	227			227			227			227
6.125% senior notes due 2021	548			548			548			548
5.375% senior notes due 2021	267			267			267			267
4.875% senior notes due 2022	451			451			451			451
8.00% senior secured second lien notes due 2022^(a)	—			—			1,416			1,895
5.75% senior notes due 2023	338			338			338			338
7.00% senior notes due 2024	850			850			—			—
8.00% senior notes due 2025	1,300			1,291			1,300			1,290
5.5% convertible senior notes due 2026^(b)(c)(d)	1,250			866			1,250			837
7.5% senior notes due 2026	400			400			—			—
8.00% senior notes due 2027	1,300			1,299			1,300			1,298
2.25% contingent convertible senior notes due 2038^(b)(d)	1			1			9			8
Term loan due 2021	—			—			1,233			1,233
Revolving credit facility	419			419			781			781
Debt issuance costs	—			(53		)	—			(63		)
Interest rate derivatives	—			1			—			2
Total debt, net	8,168			7,722			9,981			9,973
Less current maturities of long-term debt, net^(e)	(381		)	(381		)	(53		)	(52		)
Total long-term debt, net	$	7,787		$	7,341		$	9,928		$	9,921

___________________________________________


(a)	The carrying amount as of December 31, 2017 included a premium amount of $479 million associated with a troubled debt restructuring. The premium was being amortized based on the effective yield method.

(b)


(c)	The conversion and redemption provisions of our convertible senior notes are as follows:

The common stock price conversion threshold amount for the convertible senior notes is 130% of the conversion price of $8.568.


(d)	The carrying amounts as of December 31, 2018 and 2017, are reflected net of discounts of $384 million and $414 million, respectively, associated with the equity component of our convertible and contingent convertible senior notes. This amount is being amortized based on the effective yield method through the first demand repurchase date as applicable.


(e)	As of December 31, 2018, net current maturities of long-term debt includes our Floating Rate Senior Notes due April 2019 and our 2.25% Contingent Convertible Senior Notes due 2038.

Schedule of debt maturities

Debt maturities for the next five years and thereafter are as follows:



	Principal Amount of Debt Securities
	($ in millions)
2019	$	381
2020	664
2021	815
2022	451
2023	757
Thereafter	5,100
Total	$	8,168

Schedule of fair value of debt

Fair value is compared to the carrying value, excluding the impact of interest rate derivatives, in the table below:



	December 31, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
			($ in millions)
Short-term debt (Level 1)	$	381	$	379	$	52	$	53
Long-term debt (Level 1)	$	3,495	$	3,173	$	2,633	$	2,629
Long-term debt (Level 2)	$	3,846	$	3,644	$	7,286	$	7,301

Contingencies and Commitments (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of operating leases

The aggregate undiscounted minimum future lease payments are presented below:



	December 31, 2018
	($ in millions)
2019	$	3
2020	1
Total	$	4

Schedule of undiscounted commitments



	December 31, 2018
	($ in millions)
2019	$	832
2020	774
2021	683
2022	581
2023	470
2024 – 2034	2,431
Total	$	5,771

The aggregate undiscounted minimum future payments under this service contract is detailed below.



	December 31, 2018
	($ in millions)
2019	$	5
2020	5
2021	5
Total	$	15

Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Other Liabilities Disclosure [Abstract]

Other current liabilities

Other current liabilities as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018		2017
	($ in millions)
Revenues and royalties due others	$	687	$	612
Accrued drilling and production costs	258		216
Joint interest prepayments received	73		74
VPP deferred revenue^(a)	59		63
Accrued compensation and benefits	202		214
Other accrued taxes	108		43
Other	212		296
Total other current liabilities	$	1,599	$	1,518

Other long-term liabilities

Other long-term liabilities as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018		2017
	($ in millions)
VPP deferred revenue^(a)	$	63	$	122
CHK Utica ORRI conveyance obligation^(b)	—		156
Unrecognized tax benefits	53		101
Other	103		97
Total other long-term liabilities	$	219	$	476

____________________________________________

(a)

(b)

Capital Lease Obligation (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Schedule of capital lease undiscounted minimum future lease payments

The aggregate undiscounted minimum future lease payments are presented below:



	December 31, 2018
	($ in millions)
2019	$	10
2020	10
2021	10
Total minimum lease payments	30
Less imputed interest	(3		)
Present value of minimum lease payments	27
Less current maturities	(10		)
Present value of minimum lease payment, less current maturities	$	17

Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Adoption of new revenue standard



	December 31, 2018
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	69,642		$	(44,235	)	$	25,407
Unproved properties	$	2,337		$	(776	)	$	1,561
Total Property and Equipment, at Cost	$	73,700		$	(45,011	)	$	28,689
Less: accumulated depreciation, depletion and amortization (($461) and ($707) attributable to our VIE)	$	(64,685	)	$	46,799		$	(17,886	)
Total Property and Equipment, Net	$	9,030		$	1,788		$	10,818
Total Assets	$	10,947		$	1,788		$	12,735
Other current liabilities	$	1,540		$	59		$	1,599
Other long-term liabilities	$	156		$	63		$	219
Total long-term liabilities	$	7,652		$	63		$	7,715
Accumulated deficit	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake Stockholders’ Equity	$	344		$	1,748		$	2,092
Noncontrolling interests	$	123		$	(82	)	$	41
Total Equity	$	467		$	1,666		$	2,133
Total Liabilities and Equity	$	10,947		$	1,788		$	12,735



	December 31, 2017
CONSOLIDATED BALANCE SHEETS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other current assets	$	171		$	1		$	172
Proved oil and natural gas properties ($488 and $755 attributable to our VIE)	$	68,858		$	(40,926	)	$	27,932
Unproved properties	$	3,484		$	(1,460	)	$	2,024
Total Property and Equipment, at Cost	$	74,328		$	(42,386	)	$	31,942
Less: accumulated depreciation, depletion and amortization (($461) and ($700) attributable to our VIE)	$	(63,664	)	$	44,757		$	(18,907	)
Property and equipment held for sale, net	$	16		$	128		$	144
Total Property and Equipment, Net	$	10,680		$	2,499		$	13,179
Total Assets	$	12,425		$	2,500		$	14,925
Other current liabilities	$	1,455		$	63		$	1,518
Other long-term liabilities	$	354		$	122		$	476
Total long-term liabilities	$	10,441		$	122		$	10,563
Accumulated deficit	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake Stockholders’ Equity (Deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests	$	124		$	(80	)	$	44
Total Equity (Deficit)	$	(372	)	$	2,315		$	1,943
Total Liabilities and Equity	$	12,425		$	2,500		$	14,925



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	63		$	63
Loss on sale of assets	$	—		$	(264	)	$	(264	)
Total revenues	$	10,231		$	(201	)	$	10,030
Exploration expense	$	—		$	162		$	162
General and administrative	$	280		$	55		$	335
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and natural gas properties	$	578		$	(578	)	$	—
Impairments	$	53		$	78		$	131
Other operating expenses	$	10		$	(10	)	$	—
Total operating expenses	$	9,349		$	299		$	9,648
Income (loss) from operations	$	882		$	(500	)	$	382
Interest expense	$	(487	)	$	(146	)	$	(633	)
Other income	$	70		$	(3	)	$	67
Total other expense	$	(15	)	$	(149	)	$	(164	)
Income (loss) before income taxes	$	867		$	(649	)	$	218
Net income (loss)	$	877		$	(649	)	$	228
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	2		$	(2	)
Net income (loss) attributable to Chesapeake	$	873		$	(647	)	$	226
Earnings allocated to participating securities	$	(6	)	$	5		$	(1	)
Net income (loss) available to common stockholders	$	775		$	(642	)	$	133
Earnings (loss) per common share basic	$	0.85		$	(0.70	)	$	0.15
Earnings (loss) per common share diluted	$	0.85		$	(0.70	)	$	0.15



	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	67		$	67
Gain on sales of assets	$	—		$	476		$	476
Total revenues	$	9,496		$	543		$	10,039
Exploration expense	$	—		$	235		$	235
General and administrative	$	262		$	71		$	333
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Impairments	$	5		$	809		$	814
Other operating expenses	$	413		$	3		$	416
Total operating expenses	$	8,357		$	1,820		$	10,177
Income (loss) from operations	$	1,139		$	(1,277	)	$	(138	)
Interest expense	$	(426	)	$	(175	)	$	(601	)
Other income	$	9		$	(3	)	$	6
Total other expense	$	(184	)	$	(178	)	$	(362	)
Income (loss) before income taxes	$	955		$	(1,455	)	$	(500	)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Net (income) loss attributable to noncontrolling interest	$	(4	)	$	1		$	(3	)
Net income (loss) attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Earnings allocated to participating securities	$	(10	)	$	10		$	—
Net income (loss) available to common stockholders	$	813		$	(1,444	)	$	(631	)
Earnings (loss) per common share basic	$	0.90		$	(1.60	)	$	(0.70	)
Earnings (loss) per common share diluted	$	0.90		$	(1.60	)	$	(0.70	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Other revenues	$	—		$	207		$	207
Gain on sales of assets	$	—		$	626		$	626
Total revenues	$	7,872		$	833		$	8,705
Exploration expense	$	—		$	1,455		$	1,455
General and administrative	$	240		$	82		$	322
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Impairments	$	3,025		$	(2,462	)	$	563
Other operating expenses	$	365		$	12		$	377
Total operating expenses	$	12,283		$	(322	)	$	11,961
Income (loss) from operations	$	(4,411	)	$	1,155		$	(3,256	)
Interest expense	$	(296	)	$	(232	)	$	(528	)
Other income	$	19		$	(14	)	$	5
Total other expense	$	(178	)	$	(246	)	$	(424	)
Income (loss) before income taxes	$	(4,589	)	$	909		$	(3,680	)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Net (income) loss attributable to noncontrolling interest	$	9		$	(12	)	$	(3	)
Net income (loss) attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Net income (loss) available to common stockholders	$	(4,915	)	$	897		$	(4,018	)
Earnings (loss) per common share basic	$	(6.43	)	$	1.17		$	(5.26	)
Earnings (loss) per common share diluted	$	(6.43	)	$	1.17		$	(5.26	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	877		$	(649	)	$	228
Comprehensive income (loss)	$	911		$	(649	)	$	262
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	2		$	(2	)
Comprehensive income (loss) attributable to Chesapeake	$	907		$	(647	)	$	260

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Comprehensive income (loss)	$	992		$	(1,455	)	$	(463	)
Comprehensive (income) loss attributable to noncontrolling interests	$	(4	)	$	1		$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	988		$	(1,454	)	$	(466	)

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	(4,399	)	$	909		$	(3,490	)
Comprehensive income (loss)	$	(4,396	)	$	909		$	(3,487	)
Comprehensive (income) loss attributable to noncontrolling interests	$	9		$	(12	)	$	(3	)
Comprehensive income (loss) attributable to Chesapeake	$	(4,387	)	$	897		$	(3,490	)



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income	$	877		$	(649	)	$	228
Depreciation, depletion and amortization	$	1,145		$	592		$	1,737
Loss on sale of oil and gas properties	$	578		$	(578	)	$	—
Losses on sales of assets	$	—		$	264		$	264
Impairments	$	53		$	78		$	131
Exploratory dry hole expense and leasehold impairments	$	—		$	96		$	96
Other	$	(108	)	$	(10	)	$	(118	)
Increase in accounts payable, accrued liabilities and other	$	138		$	(63	)	$	75
Net cash provided by operating activities	$	2,000		$	(270	)	$	1,730
Drilling and completion costs	$	(1,958	)	$	110		$	(1,848	)
Acquisition of proved and unproved properties	$	(288	)	$	160		$	(128	)
Net cash provided by investing activities	$	185		$	270		$	455

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income (loss)	$	953		$	(1,455	)	$	(502	)
Depreciation, depletion and amortization	$	995		$	702		$	1,697
Gains on sales of assets	$	—		$	(476	)	$	(476	)
Impairments	$	5		$	809		$	814
Exploratory dry hole expense and leasehold impairments	$	—		$	214		$	214
Other	$	(135	)	$	3		$	(132	)
Decrease in accounts payable, accrued liabilities and other	$	(308	)	$	(67	)	$	(375	)
Net cash provided by operating activities	$	745		$	(270	)	$	475
Drilling and completion costs	$	(2,186	)	$	73		$	(2,113	)
Acquisition of proved and unproved properties	$	(285	)	$	197		$	(88	)
Net cash used in investing activities	$	(1,188	)	$	270		$	(918	)



	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net loss	$	(4,399	)	$	909		$	(3,490	)
Depreciation, depletion and amortization	$	1,107		$	591		$	1,698
Gain on sales of assets	$	—		$	(212	)	$	(212	)
Impairments	$	3,025		$	(2,462	)	$	563
Exploratory dry hole expense and leasehold impairments	$	—		$	1,387		$	1,387
Other	$	(145	)	$	18		$	(127	)
Decrease in accounts payable, accrued liabilities and other	$	(757	)	$	(1,007	)	$	(1,764	)
Net cash used in operating activities	$	(204	)	$	(776	)	$	(980	)
Drilling and completion costs	$	(1,295	)	$	103		$	(1,192	)
Acquisition of proved and unproved properties	$	(788	)	$	673		$	(115	)
Net cash provided by (used in) investing activities	$	(660	)	$	776		$	116



	Year Ended December 31, 2018
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(16,525	)	$	2,395		$	(14,130	)
Net income attributable to Chesapeake	$	873		$	(647	)	$	226
Accumulated deficit, end of period	$	(15,660	)	$	1,748		$	(13,912	)
Total Chesapeake stockholders’ equity (deficit)	$	344		$	1,748		$	2,092
Noncontrolling interests, beginning of period	$	124		$	(80	)	$	44
Net income (loss) attributable to noncontrolling interests	$	4		$	(2	)	$	2
Noncontrolling interests, end of period	$	123		$	(82	)	$	41
Total equity (deficit)	$	467		$	1,666		$	2,133

	Year Ended December 31, 2017
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Accumulated deficit, beginning of period	$	(17,474	)	$	3,849		$	(13,625	)
Net income attributable to Chesapeake	$	949		$	(1,454	)	$	(505	)
Accumulated deficit, end of period	$	(16,525	)	$	2,395		$	(14,130	)
Total Chesapeake stockholders’ equity (deficit)	$	(496	)	$	2,395		$	1,899
Noncontrolling interests, beginning of period	$	128		$	(79	)	$	49
Net income (loss) attributable to noncontrolling interests	$	4		$	(1	)	$	3
Noncontrolling interests, end of period	$	124		$	(80	)	$	44
Total equity (deficit)	$	(372	)	$	2,315		$	1,943

	Year Ended December 31, 2016
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	As Previously Reported Under Full Cost			Adjustment			As Revised Under Successful Efforts
	($ in millions except per share data)
Net income attributable to Chesapeake	$	(4,390	)	$	897		$	(3,493	)
Cumulative effect of change in accounting principle	$	—		$	2,952		$	2,952
Accumulated deficit, end of period	$	(17,474	)	$	3,849		$	(13,625	)
Total Chesapeake stockholders’ equity (deficit)	$	(1,331	)	$	3,849		$	2,518
Noncontrolling interests, beginning of period	$	141		$	—		$	141
Net income (loss) attributable to noncontrolling interests	$	(9	)	$	12		$	3
Cumulative effect of change in accounting principle	$	—		$	(91	)	$	(91	)
Noncontrolling interests, end of period	$	128		$	(79	)	$	49
Total equity (deficit)	$	(1,203	)	$	3,770		$	2,567

In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on our consolidated statements of operations was as follows:



	Before adoption of ASC 606		Adjustments			As Reported
			($ in millions)
Statement of Operations for the Year Ended December 31, 2018
Marketing revenues	$	5,871	$	(795	)	$	5,076
Marketing operating expenses	$	5,953	$	(795	)	$	5,158

Disaggregation of revenue

The following table shows revenue disaggregated by operating area and product type, for the year ended December 31, 2018:



	Year Ended December 31, 2018
	Oil		Natural Gas			NGL			Total
	($ in millions)
Marcellus	$	—	$	924		$	—		$	924
Haynesville	2		836			—			838
Eagle Ford	1,514		173			185			1,872
Powder River Basin	244		68			38			350
Mid-Continent	246		84			55			385
Utica	195		401			224			820
Revenue from contracts with customers	2,201		2,486			502			5,189
Gains (losses) on oil, natural gas and NGL derivatives	124		(147		)	(11		)	(34		)
Oil, natural gas and NGL revenue	$	2,325	$	2,339		$	491		$	5,155

Marketing revenue from contracts with customers	$	2,740	$	1,194		$	456		$	4,390
Other marketing revenue	457		229			—			686
Marketing revenue	$	3,197	$	1,423		$	456		$	5,076

Accounts receivable

Accounts receivable as of December 31, 2018 and 2017 are detailed below:



	December 31,
	2018			2017
	($ in millions)
Oil, natural gas and NGL sales	$	976		$	959
Joint interest billings	211			209
Other	77			184
Allowance for doubtful accounts	(17		)	(30		)
Total accounts receivable, net	$	1,247		$	1,322

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of components of the income tax provision (benefit)

The components of the income tax provision (benefit) for each of the periods presented below are as follows:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Current
Federal	$	—		$	(14	)	$	(14	)
State	—			5			(5		)
Current Income Taxes	—			(9		)	(19		)
Deferred
Federal	3			13			(147		)
State	(13		)	(2		)	(24		)
Deferred Income Taxes	(10		)	11			(171		)
Total	$	(10	)	$	2		$	(190	)

Schedule of effective income tax expense (benefit)

The effective income tax expense (benefit) differed from the computed "expected" federal income tax expense on earnings before income taxes for the following reasons:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Income tax expense (benefit) at the federal statutory rate (21%, 35%, 35%)	$	45		$	(175	)	$	(1,288	)
State income taxes (net of federal income tax benefit)	27			5			33
Remeasurement of deferred tax assets and liabilities	—			931			—
Change in valuation allowance	(97		)	(771		)	1,042
Other	15			12			23
Total	$	(10	)	$	2		$	(190	)

Schedule of deferred tax assets and liabilities

The tax-effected temporary differences, tax credits and net operating loss carryforwards that comprise our deferred taxes are as follows:



	Years Ended December 31,
	2018			2017
	($ in millions)
Deferred tax liabilities:
Property, plant and equipment	$	(976	)	$	(580	)
Volumetric production payments	(86		)	(83		)
Carrying value of debt	(95		)	—
Derivative instruments	(56		)	—
Other	(7		)	(20		)
Deferred tax liabilities	(1,220		)	(683		)

Deferred tax assets:
Net operating loss carryforwards	2,737			2,248
Carrying value of debt	—			161
Disallowed business interest carryforward	194			—
Asset retirement obligations	40			42
Investments	111			140
Derivative instruments	—			18
Accrued liabilities	89			125
Other	60			71
Deferred tax assets	3,231			2,805
Valuation allowance	(2,011		)	(2,119		)
Deferred tax assets after valuation allowance	1,220			686
Net deferred tax assets	$	—		$	3

Reconciliation of unrecognized tax benefits

A reconciliation of the beginning and ending balances of unrecognized tax benefits is as follows:



	2018			2017			2016
	($ in millions)
Unrecognized tax benefits at beginning of period	$	106		$	202		$	280
Additions based on tax positions related to the current year	—			—			—
Additions to tax positions of prior years	—			4			33
Settlements	—			(100		)	(111		)
Expiration of the applicable statute of limitations	(23		)	—			—
Reductions to tax positions of prior years	(4		)	—			—
Unrecognized tax benefits at end of period	$	79		$	106		$	202

Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of changes in common shares issued

A summary of the changes in our common shares issued for the years ended December 31, 2018, 2017 and 2016 is detailed below:



	Years Ended December 31,
	2018	2017	2016
	(in thousands)
Shares issued as of January 1	908,733	896,279	664,796
Restricted stock issuances (net of forfeitures and cancellations)	4,983	2,488	1,945
Exchange/conversion of preferred stock	—	9,966	120,186
Exchange of convertible notes	—	—	55,428
Exchange of senior notes	—	—	53,924
Shares issued as of December 31	913,716	908,733	896,279

Summary of preferred stock

Following is a summary of our preferred stock, including the primary conversion terms as of December 31, 2018:



Preferred Stock Series	Issue Date	Liquidation Preference per Share		Holder's Conversion Right	Conversion Rate	Conversion Price		Company's Conversion Right From	Company's Market Conversion Trigger^(a)
5.75% cumulative convertible non-voting	May and June 2010	$	1,000	Any time	39.6858	$	25.1979	May 17, 2015	$	32.7573

5.75% (series A) cumulative convertible non-voting	May 2010	$	1,000	Any time	38.3508	$	26.0751	May 17, 2015	$	33.8976

4.50% cumulative convertible	September 2005	$	100	Any time	2.4561	$	40.7152	September 15, 2010	$	52.9298

5.00% cumulative convertible (series 2005B)	November 2005	$	100	Any time	2.7745	$	36.0431	November 15, 2010	$	46.8560

___________________________________________


(a)	Convertible at the Company's option if the trading price of the Company's common stock equals or exceeds the trigger price for a specified time period or after the applicable conversion date if there are less than 250,000 shares of 4.50% or 5.00% (Series 2005B) preferred stock outstanding or 25,000 shares of 5.75% or 5.75% (Series A) preferred stock outstanding.

Outstanding shares of our preferred stock for the years ended December 31, 2018, 2017 and 2016 are detailed below:



	5.75%		5.75% (Series A)		4.50%	5.00% (Series 2005B)
	(in thousands)
Shares outstanding as of January 1, 2018 and December 31, 2018	770		463		2,559	1,811

Shares outstanding as of January 1, 2017	843		476		2,559	1,962
Preferred stock conversions/exchanges^(a)	(73	)	(13	)	—	(151	)
Shares outstanding as of December 31, 2017	770		463		2,559	1,811

Shares outstanding as of January 1, 2016	1,497		1,100		2,559	2,096
Preferred stock conversions/exchanges^(b)	(654	)	(624	)	—	(134	)
Shares outstanding as of December 31, 2016	843		476		2,559	1,962

____________________________________________

(a)

(b)

Schedule of Accumulated Other Comprehensive Income (Loss)

For the years ended December 31, 2018 and 2017, changes in accumulated other comprehensive income (loss) for cash flow hedges, net of tax, are detailed below:



	Years Ended December 31,
	2018			2017
	($ in millions)
Balance, as of January 1	$	(57	)	$	(96	)
Other comprehensive income before reclassifications	—			5
Amounts reclassified from accumulated other comprehensive income^(a)	34			34
Net other comprehensive income	34			39
Balance, as of December 31	$	(23	)	$	(57	)


(a)	Net losses on cash flow hedges for commodity contracts reclassified from accumulated other comprehensive income (loss), net of tax, to oil, natural gas and NGL revenues in the consolidated statements of operations.

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

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+ Details

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of changes in unvested restricted stock

A summary of the changes in unvested restricted stock during 2018, 2017 and 2016 is presented below:



	Shares of Unvested Restricted Stock		Weighted Average Grant Date Fair Value
	(in thousands)
Unvested restricted stock as of January 1, 2018	13,178		$	6.37
Granted	6,067		$	3.73
Vested	(5,808	)	$	7.67
Forfeited	(1,579	)	$	6.02
Unvested restricted stock as of December 31, 2018	11,858		$	4.43

Unvested restricted stock as of January 1, 2017	9,092		$	11.39
Granted	9,872		$	5.40
Vested	(4,573	)	$	13.73
Forfeited	(1,213	)	$	8.32
Unvested restricted stock as of December 31, 2017	13,178		$	6.37

Unvested restricted stock as of January 1, 2016	10,455		$	17.31
Granted	4,604		$	4.58
Vested	(4,692	)	$	17.23
Forfeited	(1,275	)	$	13.91
Unvested restricted stock as of December 31, 2016	9,092		$	11.39

Schedule of share-based payment assumptions

We used the following weighted average assumptions to estimate the grant date fair value of the stock options granted in 2018:



Expected option life – years	6.0
Volatility	63.55	%
Risk-free interest rate	2.72	%
Dividend yield	—	%

We utilized a Monte Carlo simulation for the TSR performance measure and the following assumptions to determine the grant date fair value and the reporting date fair value of the 2017 awards. The performance period for the 2016 awards ended on December 31, 2018 and the TSR component has been finalized.



Grant Date Assumptions
Assumption	2017 Awards
Volatility	80.65	%
Risk-free interest rate	1.54	%
Dividend yield for value of awards	—	%



Reporting Date Assumptions
Assumption	2017 Awards
Volatility	64.69	%
Risk-free interest rate	2.63	%
Dividend yield for value of awards	—	%

Schedule of information related to stock option activity

The following table provides information related to stock option activity for 2018, 2017 and 2016:



	Number of Shares Underlying Options		Weighted Average Exercise Price Per Share		Weighted Average Contract Life in Years	Aggregate Intrinsic Value^(a)
	(in thousands)					($ in millions)
Outstanding as of January 1, 2018	16,285		$	8.25	7.73	$	1
Granted	3,611		$	3.01
Exercised	—		$	—		$	—
Expired	(602	)	$	13.83
Forfeited	(1,198	)	$	5.45
Outstanding as of December 31, 2018	18,096		$	7.20	7.15	$	—
Exercisable as of December 31, 2018	8,250		$	10.73	5.73	$	—

Outstanding as of January 1, 2017	8,593		$	11.88	7.22	$	14
Granted	9,226		$	5.45
Exercised	—		$	—		$	—
Expired	(435	)	$	18.50
Forfeited	(1,099	)	$	9.12
Outstanding as of December 31, 2017	16,285		$	8.25	7.73	$	1
Exercisable as of December 31, 2017	4,474		$	15.15	5.26	$	—

Outstanding as of January 1, 2016	5,377		$	19.37	5.80	$	—
Granted	4,932		$	3.71
Exercised	—		$	—		$	—
Expired	(771	)	$	19.46
Forfeited	(945	)	$	5.66
Outstanding as of December 31, 2016	8,593		$	11.88	7.22	$	14
Exercisable as of December 31, 2016	2,844		$	19.60	5.53	$	—

___________________________________________


(a)	The intrinsic value of a stock option is the amount by which the current market value or the market value upon exercise of the underlying stock exceeds the exercise price of the option.

Schedule of compensation costs (credit), net of actual forfeitures

We recognized the following compensation costs (credits), net of actual forfeitures, related to our liability-classified awards for the years ended December 31, 2018, 2017 and 2016:



	Years Ended December 31,
	2018		2017			2016
	($ in millions)
General and administrative expenses	$	9	$	(4	)	$	14
Oil and natural gas properties	1		—			—
Oil, natural gas and NGL production expenses	2		—			—
Restructuring and other termination costs	—		—			1
Total liability-classified awards compensation	$	12	$	(4	)	$	15

We recognized the following compensation costs, net of actual forfeitures, related to restricted stock and stock options for the years ended December 31, 2018, 2017 and 2016:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
General and administrative expenses	$	31	$	43	$	48
Oil and natural gas properties	2		5		6
Oil, natural gas and NGL production expenses	5		12		13
Exploration expenses	1		1		—
Marketing expenses	—		—		1
Total restricted stock and stock option compensation	$	39	$	61	$	68

Summary of liability-classified awards

The following table presents a summary of our liability-classified awards:



		Grant Date Fair Value		December 31, 2018
	Units	Grant Date Fair Value		Fair Value		Vested Liability
		($ in millions)		($ in millions)
2018 PSU Awards:
Payable 2019, 2020 and 2021	3,959,647	$	12	$	11	$	—
2017 PSU Awards:
Payable 2020	1,217,774	$	8	$	3	$	1
2016 PSU Awards:
Payable 2019	2,348,893	$	10	$	6	$	4
2018 CRSU Awards:
Payable 2019, 2020 and 2021	15,189,197	$	46	$	32	$	—

Derivative and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of estimated fair value of oil, natural gas and NGL derivative instrument asset (liabilities)

The estimated fair values of our oil, natural gas and NGL derivative instrument assets (liabilities) as of December 31, 2018 and 2017 are provided below:



	December 31, 2018				December 31, 2017
	Notional Volume	Fair Value			Notional Volume	Fair Value
		($ in millions)				($ in millions)
Oil (mmbbl):
Fixed-price swaps	12	$	157		21	$	(151	)
Collars	8	98			—	—
Three-way collars	—	—			2	(10		)
Call swaptions	—	—			2	(13		)
Basis protection swaps	7	5			11	(9		)
Total oil	27	260			36	(183		)
Natural gas (bcf):
Fixed-price swaps	623	26			532	149
Three-way collars	88	1			—	—
Collars	55	(3		)	47	11
Call options	44	—			110	(3		)
Call swaptions	106	(9		)	—	—
Basis protection swaps	50	—			65	(7		)
Total natural gas	966	15			754	150
NGL (mmgal):
Fixed-price swaps	—	—			33	(2		)
Contingent Consideration:
Utica divestiture		7				—
Total estimated fair value		$	282			$	(35	)

Schedule of effects of dividend instruments in consolidated balance sheets



Balance Sheet Classification	Gross Fair Value			Amounts Netted in the Consolidated Balance Sheets			Net Fair Value Presented in the Consolidated Balance Sheets
	($ in millions)
As of December 31, 2018
Commodity Contracts:
Short-term derivative asset	$	306		$	(104	)	$	202
Long-term derivative asset	117			(41		)	76
Short-term derivative liability	(107		)	104			(3		)
Long-term derivative liability	(41		)	41			—
Contingent Consideration:
Short-term derivative asset	7			—			7
Total derivatives	$	282		$	—		$	282

As of December 31, 2017
Commodity Contracts:
Short-term derivative asset	$	157		$	(130	)	$	27
Short-term derivative liability	(188		)	130			(58		)
Long-term derivative liability	(4		)	—			(4		)
Total derivatives	$	(35	)	$	—		$	(35	)

Schedule of effects of derivative instruments in consolidated statements of operations

The components of marketing revenues for the years ended December 31, 2018, 2017 and 2016 are presented below:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Marketing revenues	$	5,069	$	4,511	$	4,881
Gains on undesignated marketing natural gas derivatives	7		—		—
Losses on undesignated supply contract derivatives	—		—		(297		)
Total marketing revenues	$	5,076	$	4,511	$	4,584

The components of oil, natural gas and NGL revenues for the years ended December 31, 2018, 2017 and 2016 are presented below:



	Years Ended December 31,
	2018			2017			2016
	($ in millions)
Oil, natural gas and NGL revenues	$	5,189		$	4,574		$	3,866
Gains (losses) on undesignated oil, natural gas and NGL derivatives	—			445			(545		)
Losses on terminated cash flow hedges	(34		)	(34		)	(33		)
Total oil, natural gas and NGL revenues	$	5,155		$	4,985		$	3,288

Schedule of effects of derivative instruments in accumulated other comprehensive income (loss)

A reconciliation of the changes in accumulated other comprehensive income (loss) in our consolidated statements of stockholders’ equity related to our cash flow hedges is presented below:



	Years Ended December 31,
	2018						2017						2016
	Before Tax			After Tax			Before Tax			After Tax			Before Tax			After Tax
	($ in millions)
Balance, beginning of period	$	(114	)	$	(57	)	$	(153	)	$	(96	)	$	(160	)	$	(99	)
Net change in fair value	—			—			5			5			(27		)	(13		)
Losses reclassified to income	34			34			34			34			34			16
Balance, end of period	$	(80	)	$	(23	)	$	(114	)	$	(57	)	$	(153	)	$	(96	)

Schedule of fair value measurement of financial assets (liabilities) measured at fair value on a recurring basis

The following table provides information for financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
			($ in millions)
As of December 31, 2018
Derivative Assets (Liabilities):
Commodity assets	$	—	$	319		$	103		$	422
Commodity liabilities	—		(131		)	(16		)	(147		)
Utica divestiture contingent consideration	—		—			7			7
Total derivatives	$	—	$	188		$	94		$	282

As of December 31, 2017
Derivative Assets (Liabilities):
Commodity assets	$	—	$	—		$	8		$	8
Commodity liabilities	—		(20		)	(23		)	(43		)
Total derivatives	$	—	$	(20	)	$	(15	)	$	(35	)

A summary of the changes in the fair values of our financial assets (liabilities) classified as Level 3 during 2018 and 2017 is presented below:



	Commodity Derivatives			Utica Contingent Consideration
	($ in millions)
Balance, as of January 1, 2018	$	(15	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	77			7
Total purchases, issuances, sales and settlements:
Settlements	25			—
Balance, as of December 31, 2018	$	87		$	7

Balance, as of January 1, 2017	$	(10	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	2			—
Total purchases, issuances, sales and settlements:
Settlements	(7		)	—
Balance, as of December 31, 2017	$	(15	)	$	—

___________________________________________



(a)		Commodity Derivatives					Utica Contingent Consideration
		Commodity Derivatives					Utica Contingent Consideration
		2018		2017			2018		2017
		($ in millions)
	Total gains included in earnings for the period	$	77	$	2		$	7	$	—
	Change in unrealized gains (losses) related to assets still held at reporting date	$	86	$	(14	)	$	7	$	—

The following table provides fair value measurement information for the above-noted financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
	($ in millions)
As of December 31, 2018
Financial Assets (Liabilities):
Other current assets	$	50		$	—	$	—	$	50
Other current liabilities	(51		)	—		—		(51		)
Total	$	(1	)	$	—	$	—	$	(1	)

As of December 31, 2017
Financial Assets (Liabilities):
Other current assets	$	57		$	—	$	—	$	57
Other current liabilities	(60		)	—		—		(60		)
Total	$	(3	)	$	—	$	—	$	(3	)

Schedule of quantitative information about Level 3 inputs used in fair value measurement of commodity contracts

The following table presents quantitative information about Level 3 inputs used in the fair value measurement of our commodity derivative contracts as of December 31, 2018:



Instrument Type	Unobservable Input	Range	Weighted Average	Fair Value December 31, 2018
				($ in millions)
Oil trades	Oil price volatility curves	23.70% – 42.17%	32.51%	$	98
Natural gas trades	Natural gas price volatility curves	12.88% – 90.93%	24.93%	$	(11	)
Utica contingent consideration	Natural gas price volatility curves	10.36% – 57.66%	—	$	7

Capitalized Exploratory Well Costs (Tables)

12 Months Ended

Dec. 31, 2018

Extractive Industries [Abstract]

Summary of changes in capitalized well costs



	2018			2017			2016
	(in millions)
Balance as of January 1	$	36		$	41		$	48
Additions pending the determination of proved reserves	74			14			15
Divestitures and other	—			—			—
Reclassifications to proved properties	(40		)	(19		)	(22		)
Charges to exploration expense	(34		)	—			—
Balance as of December 31	$	36		$	36		$	41

Schedule of aging of capitalize costs and the number of projects for which exploratory well costs have been capitalized



	2018		2017		2016
	(in millions)
Exploratory well costs capitalized for a period of one year or less	$	34	$	4	$	2
Exploratory well costs capitalized for a period greater than one year	2		32		39
Balance as of December 31	$	36	$	36	$	41

Number of projects with exploratory well costs capitalized for a period greater than one year	7		6		5

Other Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Summary of other property and equipment held for use and estimated useful lives

A summary of other property and equipment held for use and the estimated useful lives thereof is as follows:



	December 31,						Estimated Useful Life
	2018			2017			Estimated Useful Life
	($ in millions)						(in years)
Buildings and improvements	$	1,053		$	1,093		10 – 39
Computer equipment	353			345			5
Natural gas compressors^(a)	48			235			3 – 20
Land	106			126
Other	161			187			5 – 20
Total other property and equipment, at cost	1,721			1,986
Less: accumulated depreciation	(630		)	(672		)
Total other property and equipment, net	$	1,091		$	1,314

___________________________________________

Impairments (Tables)

12 Months Ended

Dec. 31, 2018

Asset Impairment Charges [Abstract]

Summary of impairments

A summary of our impairments of fixed assets by asset class and other charges for the years ended December 31, 2018, 2017 and 2016 is as follows:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Natural gas compressors	$	45	$	—	$	21
Barnett Shale exit costs	—		—		284
Devonian Shale exit costs	—		—		142
Gathering systems	—		—		3
Buildings and land	4		5		11
Other	4		—		—
Total impairments of fixed assets and other	$	53	$	5	$	461

A summary of our impairments of oil and natural gas properties for the years ended December 31, 2018, 2017 and 2016 is as follows:



	Years Ended December 31,
	2018		2017		2016
	($ in millions)
Impairments due to lower forecasted commodity prices	$	23	$	27	$	73
Impairments due to reduction in future development^(a)	—		560		—
Impairments due to anticipated sale	55		222		29
Total impairments of oil and natural gas properties	$	78	$	809	$	102

(a) The impairment was the result of an updated development plan in 2017, which included a removal of PUDs from properties in the process of being divested in the Mid-Continent operating area.

Restructuring and Other Termination Costs (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Summary of restructuring liabilities

The following table summarizes our restructuring liabilities:



	Other Current Liabilities
	($ in millions)
Balance as of December 31, 2017	$	—
Initial restructuring recognition on January 30, 2018	38
Termination benefits paid	(38		)
Balance as of December 31, 2018	$	—

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of fair value measurement of financial assets (liabilities) measured at fair value on a recurring basis

The following table provides information for financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Fair Value
			($ in millions)
As of December 31, 2018
Derivative Assets (Liabilities):
Commodity assets	$	—	$	319		$	103		$	422
Commodity liabilities	—		(131		)	(16		)	(147		)
Utica divestiture contingent consideration	—		—			7			7
Total derivatives	$	—	$	188		$	94		$	282

As of December 31, 2017
Derivative Assets (Liabilities):
Commodity assets	$	—	$	—		$	8		$	8
Commodity liabilities	—		(20		)	(23		)	(43		)
Total derivatives	$	—	$	(20	)	$	(15	)	$	(35	)

A summary of the changes in the fair values of our financial assets (liabilities) classified as Level 3 during 2018 and 2017 is presented below:



	Commodity Derivatives			Utica Contingent Consideration
	($ in millions)
Balance, as of January 1, 2018	$	(15	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	77			7
Total purchases, issuances, sales and settlements:
Settlements	25			—
Balance, as of December 31, 2018	$	87		$	7

Balance, as of January 1, 2017	$	(10	)	$	—
Total gains (losses) (realized/unrealized):
Included in earnings^(a)	2			—
Total purchases, issuances, sales and settlements:
Settlements	(7		)	—
Balance, as of December 31, 2017	$	(15	)	$	—

___________________________________________



(a)		Commodity Derivatives					Utica Contingent Consideration
		Commodity Derivatives					Utica Contingent Consideration
		2018		2017			2018		2017
		($ in millions)
	Total gains included in earnings for the period	$	77	$	2		$	7	$	—
	Change in unrealized gains (losses) related to assets still held at reporting date	$	86	$	(14	)	$	7	$	—

The following table provides fair value measurement information for the above-noted financial assets (liabilities) measured at fair value on a recurring basis as of December 31, 2018 and 2017:



	Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
	($ in millions)
As of December 31, 2018
Financial Assets (Liabilities):
Other current assets	$	50		$	—	$	—	$	50
Other current liabilities	(51		)	—		—		(51		)
Total	$	(1	)	$	—	$	—	$	(1	)

As of December 31, 2017
Financial Assets (Liabilities):
Other current assets	$	57		$	—	$	—	$	57
Other current liabilities	(60		)	—		—		(60		)
Total	$	(3	)	$	—	$	—	$	(3	)

Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Schedule of asset retirement obligations

The components of the change in our asset retirement obligations are shown below:



	Years Ended December 31,
	2018			2017
	($ in millions)
Asset retirement obligations, beginning of period	$	177		$	261
Additions	3			5
Revisions	11			(34		)
Settlements and disposals	(35		)	(70		)
Accretion expense	10			15
Asset retirement obligations, end of period	166			177
Less current portion	11			15
Asset retirement obligation, long-term	$	155		$	162

Condensed Consolidating Financial Information (Tables)

12 Months Ended

Dec. 31, 2018

Condensed Financial Information Disclosure [Abstract]

Condensed consolidated balance sheets

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF DECEMBER 31, 2018

($ in millions)



	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
CURRENT ASSETS:
Cash and cash equivalents	$	4	$	1	$	1	$	(2	)	$	4
Other current assets	60		1,532		2		—			1,594
Intercompany receivable, net	6,671		—		—		(6,671		)	—
Total Current Assets	6,735		1,533		3		(6,673		)	1,598
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on successful efforts accounting, net	—		9,664		48		—			9,712
Other property and equipment, net	—		1,091		—		—			1,091
Property and equipment held for sale, net	—		15		—		—			15
Total Property and Equipment, Net	—		10,770		48		—			10,818
LONG-TERM ASSETS:
Other long-term assets	26		293		—		—			319
Investments in subsidiaries and intercompany advances	3,248		9		—		(3,257		)	—
TOTAL ASSETS	$	10,009	$	12,605	$	51	$	(9,930	)	$	12,735

CURRENT LIABILITIES:
Current liabilities	$	523	$	2,365	$	1	$	(2	)	$	2,887
Intercompany payable, net	—		6,671		—		(6,671		)	—
Total Current Liabilities	523		9,036		1		(6,673		)	2,887
LONG-TERM LIABILITIES:
Long-term debt, net	7,341		—		—		—			7,341
Other long-term liabilities	53		321		—		—			374
Total Long-Term Liabilities	7,394		321		—		—			7,715
EQUITY:
Chesapeake stockholders’ equity	2,092		3,248		9		(3,257		)	2,092
Noncontrolling interests	—		—		41		—			41
Total Equity	2,092		3,248		50		(3,257		)	2,133
TOTAL LIABILITIES AND EQUITY	$	10,009	$	12,605	$	51	$	(9,930	)	$	12,735

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF DECEMBER 31, 2017

($ in millions)



	Parent		Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
CURRENT ASSETS:
Cash and cash equivalents	$	5	$	1		$	2		$	(3	)	$	5
Other current assets	154		1,365			3			(1		)	1,521
Intercompany receivable, net	8,699		434			—			(9,133		)	—
Total Current Assets	8,858		1,800			5			(9,137		)	1,526
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on successful efforts accounting, net	—		11,666			55			—			11,721
Other property and equipment, net	—		1,314			—			—			1,314
Property and equipment held for sale, net	—		144			—			—			144
Total Property and Equipment, Net	—		13,124			55			—			13,179
LONG-TERM ASSETS:
Other long-term assets	52		168			—			—			220
Investments in subsidiaries and intercompany advances	3,201		(38		)	—			(3,163		)	—
TOTAL ASSETS	$	12,111	$	15,054		$	60		$	(12,300	)	$	14,925

CURRENT LIABILITIES:
Current liabilities	$	190	$	2,231		$	2		$	(4	)	$	2,419
Intercompany payable, net	—		9,081			52			(9,133		)	—
Total Current Liabilities	190		11,312			54			(9,137		)	2,419
LONG-TERM LIABILITIES:
Long-term debt, net	9,921		—			—			—			9,921
Other long-term liabilities	101		541			—			—			642
Total Long-Term Liabilities	10,022		541			—			—			10,563
EQUITY:
Chesapeake stockholders’ equity (deficit)	1,899		3,201			(38		)	(3,163		)	1,899
Noncontrolling interests	—		—			44			—			44
Total Equity	1,899		3,201			6			(3,163		)	1,943
TOTAL LIABILITIES AND EQUITY	$	12,111	$	15,054		$	60		$	(12,300	)	$	14,925

Condensed consolidated income statements



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
REVENUES AND OTHER:
Oil, natural gas and NGL	$	—		$	5,136		$	19		$	—		$	5,155
Marketing	—			5,076			—			—			5,076
Total Revenues	—			10,212			19						10,231
Other	—			63			—			—			63
Losses on sales of assets	—			(264		)	—			—			(264		)
Total Revenues and Other	—			10,011			19			—			10,030
OPERATING EXPENSES:
Oil, natural gas and NGL production	—			539			—			—			539
Oil, natural gas and NGL gathering, processing and transportation	—			1,391			7			—			1,398
Production taxes	—			123			1			—			124
Exploration	—			162			—			—			162
Marketing	—			5,158			—			—			5,158
General and administrative	2			332			1			—			335
Restructuring and other termination costs	—			38			—			—			38
Provision for legal contingencies, net	—			26			—			—			26
Depreciation, depletion and amortization	—			1,730			7			—			1,737
Impairments	—			131			—			—			131
Total Operating Expenses	2			9,630			16			—			9,648
INCOME (LOSS) FROM OPERATIONS	(2		)	381			3			—			382
OTHER INCOME (EXPENSE):
Interest expense	(631		)	(2		)	—			—			(633		)
Gains on investments	—			139			—			—			139
Gains on purchases or exchanges of debt	263			—			—			—			263
Other income	3			64			—			—			67
Equity in net earnings of subsidiary	583			1			—			(584		)	—
Total Other Income (Expense)	218			202			—			(584		)	(164		)
INCOME BEFORE INCOME TAXES	216			583			3			(584		)	218
INCOME TAX BENEFIT	(10		)	—			—			—			(10		)
NET INCOME	226			583			3			(584		)	228
Net income attributable to noncontrolling interests	—			—			(2		)	—			(2		)
NET INCOME ATTRIBUTABLE TO CHESAPEAKE	226			583			1			(584		)	226
Other comprehensive income	—			34			—			—			34
COMPREHENSIVE INCOME ATTRIBUTABLE TO CHESAPEAKE	$	226		$	617		$	1		$	(584	)	$	260

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS

YEAR ENDED DECEMBER 31, 2017

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations		Consolidated
REVENUES AND OTHER:
Oil, natural gas and NGL	$	—		$	4,962		$	23		$	—	$	4,985
Marketing	—			4,511			—			—		4,511
Total Revenues	—			9,473			23			—		9,496
Other	—			67			—			—		67
Gains on sales of assets	—			476			—			—		476
Total Revenues and Other	—			10,016			23			—		10,039
OPERATING EXPENSES:
Oil, natural gas and NGL production	—			562			—			—		562
Oil, natural gas and NGL gathering, processing and transportation	—			1,463			8			—		1,471
Production taxes	—			88			1			—		89
Exploration	—			235			—			—		235
Marketing	—			4,598			—			—		4,598
General and administrative	1			330			2			—		333
Provision for legal contingencies, net	(79		)	41			—			—		(38		)
Depreciation, depletion and amortization	—			1,688			9			—		1,697
Impairments	—			814			—			—		814
Other operating expense	—			416			—			—		416
Total Operating Expenses	(78		)	10,235			20			—		10,177
INCOME (LOSS) FROM OPERATIONS	78			(219		)	3			—		(138		)
OTHER INCOME (EXPENSE):
Interest expense	(599		)	(2		)	—			—		(601		)
Gains on purchases or exchanges of debt	233			—			—			—		233
Other income	1			5			—			—		6
Equity in net earnings of subsidiary	(216		)	—			—			216		—
Total Other Income (Expense)	(581		)	3			—			216		(362		)
INCOME (LOSS) BEFORE INCOME TAXES	(503		)	(216		)	3			216		(500		)
INCOME TAX EXPENSE	2			—			—			—		2
NET INCOME (LOSS)	(505		)	(216		)	3			216		(502		)
Net income attributable to noncontrolling interests	—			—			(3		)	—		(3		)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	(505		)	(216		)	—			216		(505		)
Other comprehensive income	—			39			—			—		39
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	$	(505	)	$	(177	)	$	—		$	216	$	(466	)

Condensed consolidated cash flow statements

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

YEAR ENDED DECEMBER 31, 2018

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By Operating Activities	$	85		$	1,642		$	10		$	(7	)	$	1,730

CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	—			(1,848		)	—			—			(1,848		)
Acquisitions of proved and unproved properties	—			(128		)	—			—			(128		)
Proceeds from divestitures of proved and unproved properties	—			2,231			—			—			2,231
Additions to other property and equipment	—			(21		)	—			—			(21		)
Proceeds from sales of other property and equipment	—			147			—			—			147
Proceeds from sales of investments	—			74			—			—			74
Net Cash Provided by Investing Activities	—			455			—			—			455

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	11,697			—			—			—			11,697
Payments on revolving credit facility borrowings	(12,059		)	—			—			—			(12,059		)
Proceeds from issuance of senior notes, net	1,236			—			—			—			1,236
Cash paid to purchase debt	(2,813		)	—			—			—			(2,813		)
Cash paid for preferred stock dividends	(92		)	—			—			—			(92		)
Other financing activities	(26		)	(123		)	(13		)	7			(155		)
Intercompany advances, net	1,971			(1,974		)	2			1			—
Net Cash Used In Financing Activities	(86		)	(2,097		)	(11		)	8			(2,186		)
Net decrease in cash and cash equivalents	(1		)	—			(1		)	1			(1		)
Cash and cash equivalents, beginning of period	5			1			2			(3		)	5
Cash and cash equivalents, end of period	$	4		$	1		$	1		$	(2	)	$	4

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

YEAR ENDED DECEMBER 31, 2017

($ in millions)



	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By Operating Activities	$	5		$	466		$	14		$	(10	)	$	475

CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	—			(2,113		)	—			—			(2,113		)
Acquisitions of proved and unproved properties	—			(88		)	—			—			(88		)
Proceeds from divestitures of proved and unproved properties	—			1,249			—			—			1,249
Additions to other property and equipment	—			(21		)	—			—			(21		)
Other investing activities	—			55			—			—			55
Net Cash Used In Investing Activities	—			(918		)	—			—			(918		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	7,771			—			—			—			7,771
Payments on revolving credit facility borrowings	(6,990		)	—			—			—			(6,990		)
Proceeds from issuance of senior notes, net	1,585			—			—			—			1,585
Cash paid to purchase debt	(2,592		)	—			—			—			(2,592		)
Cash paid for preferred stock dividends	(183		)	—			—			—			(183		)
Other financing activities	(39		)	(5		)	(13		)	32			(25		)
Intercompany advances, net	(456		)	456			—			—			—
Net Cash Provided by (Used In) Financing Activities	(904		)	451			(13		)	32			(434		)
Net increase (decrease) in cash and cash equivalents	(899		)	(1		)	1			22			(877		)
Cash and cash equivalents, beginning of period	904			2			1			(25		)	882
Cash and cash equivalents, end of period	$	5		$	1		$	2		$	(3	)	$	5

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)
Summary of Significant Accounting Policies [Table] [Line Items]
Number of reportable segments \| segment	1
Bank overdrafts	$ 104	$ 92
Unamortized issuance costs, senior notes	$ 53	63
Revenue, payment terms	30
Employee [Member]
Summary of Significant Accounting Policies [Table] [Line Items]
Vesting period	3 years
Director [Member]
Summary of Significant Accounting Policies [Table] [Line Items]
Vesting period	3 years
Other noncurrent assets [Member]
Summary of Significant Accounting Policies [Table] [Line Items]
Unamortized issuance costs	$ 30	$ 22

Change in Accounting Principle - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets	$ 138	$ 172
Proved oil and natural gas properties	25,407	27,932
Unproved properties	1,561	2,024
Total Property and Equipment, at Cost	28,689	31,942
Less: accumulated depreciation, depletion and amortization (($707) and ($700) attributable to our VIE)	(17,886)	(18,907)
Property and equipment held for sale, net	15	144
Total Property and Equipment, Net	10,818	13,179
TOTAL ASSETS	12,735	14,925
Other current liabilities	1,599	1,518
Other long-term liabilities	219	476
Total Long-Term Liabilities	7,715	10,563
Accumulated deficit	(13,912)	(14,130)
Total Chesapeake Stockholders’ Equity	2,092	1,899
Noncontrolling interests	41	44
Total Equity	2,133	1,943	$ 2,567
TOTAL LIABILITIES AND EQUITY	12,735	14,925
As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets		171
Proved oil and natural gas properties	69,642	68,858
Unproved properties	2,337	3,484
Total Property and Equipment, at Cost	73,700	74,328
Less: accumulated depreciation, depletion and amortization (($707) and ($700) attributable to our VIE)	(64,685)	(63,664)
Property and equipment held for sale, net		16
Total Property and Equipment, Net	9,030	10,680
TOTAL ASSETS	10,947	12,425
Other current liabilities	1,540	1,455
Other long-term liabilities	156	354
Total Long-Term Liabilities	7,652	10,441
Accumulated deficit	(15,660)	(16,525)
Total Chesapeake Stockholders’ Equity	344	(496)
Noncontrolling interests	123	124
Total Equity	467	(372)	(1,203)
TOTAL LIABILITIES AND EQUITY	10,947	12,425
Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets		1
Proved oil and natural gas properties	(44,235)	(40,926)
Unproved properties	(776)	(1,460)
Total Property and Equipment, at Cost	(45,011)	(42,386)
Less: accumulated depreciation, depletion and amortization (($707) and ($700) attributable to our VIE)	46,799	44,757
Property and equipment held for sale, net		128
Total Property and Equipment, Net	1,788	2,499
TOTAL ASSETS	1,788	2,500
Other current liabilities	59	63
Other long-term liabilities	63	122
Total Long-Term Liabilities	63	122
Accumulated deficit	1,748	2,395
Total Chesapeake Stockholders’ Equity	1,748	2,395
Noncontrolling interests	(82)	(80)
Total Equity	1,666	2,315	$ 3,770
TOTAL LIABILITIES AND EQUITY	$ 1,788	$ 2,500

Change in Accounting Principle - Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Revenues	$ 10,030	$ 10,039	$ 8,705
Gains (losses) on sales of assets	(264)	476	626
General and administrative	335	333	322
Depreciation, depletion and amortization	1,737	1,697	1,698
Gain (loss) on sale of oil and natural gas properties	0
Impairments	131	814	563
Other operating expenses	0	416	377
Total Operating Expenses	9,648	10,177	11,961
INCOME (LOSS) FROM OPERATIONS	382	(138)	(3,256)
Interest expense	(633)	(601)	(528)
Other income	67	6	5
Total Other Expense	(164)	(362)	(424)
INCOME (LOSS) BEFORE INCOME TAXES	218	(500)	(3,680)
NET INCOME (LOSS)	228	(502)	(3,490)
Net income attributable to noncontrolling interests	(2)	(3)	(3)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	226	(505)	(3,493)
Earnings allocated to participating securities	(1)	0	0
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ 133	$ (631)	$ (4,018)
Earnings (loss) per common share basic (in usd per share)	$ 0.15	$ (0.70)	$ (5.26)
Earnings (loss) per common share diluted (in usd per share)	$ 0.15	$ (0.70)	$ (5.26)
Other [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	$ 63	$ 67	$ 207
Exploration [Member]
Condensed Income Statements, Captions [Line Items]
Cost of goods and services	162	235	1,455
As Previously Reported Under Full Cost [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	10,231	9,496	7,872
Gains (losses) on sales of assets	0	0	0
General and administrative	280	262	240
Depreciation, depletion and amortization	1,145	995	1,107
Gain (loss) on sale of oil and natural gas properties	578
Impairments	53	5	3,025
Other operating expenses	10	413	365
Total Operating Expenses	9,349	8,357	12,283
INCOME (LOSS) FROM OPERATIONS	882	1,139	(4,411)
Interest expense	(487)	(426)	(296)
Other income	70	9	19
Total Other Expense	(15)	(184)	(178)
INCOME (LOSS) BEFORE INCOME TAXES	867	955	(4,589)
NET INCOME (LOSS)	877	953	(4,399)
Net income attributable to noncontrolling interests	(4)	(4)	9
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	873	949	(4,390)
Earnings allocated to participating securities	(6)	(10)
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ 775	$ 813	$ (4,915)
Earnings (loss) per common share basic (in usd per share)	$ 0.85	$ 0.90	$ (6.43)
Earnings (loss) per common share diluted (in usd per share)	$ 0.85	$ 0.90	$ (6.43)
As Previously Reported Under Full Cost [Member] \| Other [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	$ 0	$ 0	$ 0
As Previously Reported Under Full Cost [Member] \| Exploration [Member]
Condensed Income Statements, Captions [Line Items]
Cost of goods and services	0	0	0
Successful Efforts Adjustment [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	(201)	543	833
Gains (losses) on sales of assets	(264)	476	626
General and administrative	55	71	82
Depreciation, depletion and amortization	592	702	591
Gain (loss) on sale of oil and natural gas properties	(578)
Impairments	78	809	(2,462)
Other operating expenses	(10)	3	12
Total Operating Expenses	299	1,820	(322)
INCOME (LOSS) FROM OPERATIONS	(500)	(1,277)	1,155
Interest expense	(146)	(175)	(232)
Other income	(3)	(3)	(14)
Total Other Expense	(149)	(178)	(246)
INCOME (LOSS) BEFORE INCOME TAXES	(649)	(1,455)	909
NET INCOME (LOSS)	(649)	(1,455)	909
Net income attributable to noncontrolling interests	2	1	(12)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	(647)	(1,454)	897
Earnings allocated to participating securities	5	10
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ (642)	$ (1,444)	$ 897
Earnings (loss) per common share basic (in usd per share)	$ (0.70)	$ (1.60)	$ 1.17
Earnings (loss) per common share diluted (in usd per share)	$ (0.70)	$ (1.60)	$ 1.17
Successful Efforts Adjustment [Member] \| Other [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	$ 63	$ 67	$ 207
Successful Efforts Adjustment [Member] \| Exploration [Member]
Condensed Income Statements, Captions [Line Items]
Cost of goods and services	$ 162	$ 235	$ 1,455

Change in Accounting Principle - Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
NET INCOME (LOSS)	$ 228	$ (502)	$ (3,490)
COMPREHENSIVE INCOME (LOSS)	262	(463)	(3,487)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2)	(3)	(3)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	260	(466)	(3,490)
As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
NET INCOME (LOSS)	877	953	(4,399)
COMPREHENSIVE INCOME (LOSS)	911	992	(4,396)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(4)	(4)	9
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	907	988	(4,387)
Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
NET INCOME (LOSS)	(649)	(1,455)	909
COMPREHENSIVE INCOME (LOSS)	(649)	(1,455)	909
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	2	1	(12)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE	$ (647)	$ (1,454)	$ 897

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

+ Details

Change in Accounting Principle - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
NET INCOME (LOSS)	$ 228	$ (502)	$ (3,490)
Depreciation, depletion and amortization	1,737	1,697	1,698
Loss on sale of oil and gas properties	0
(Gains) losses on sales of assets	264	(476)	(212)
Impairments	131	814	563
Exploratory dry hole expense and leasehold impairments	96	214	1,387
Other	(118)	(132)	(127)
(Decrease) increase in accounts payable, accrued liabilities and other	75	(375)	(1,764)
Net Cash Provided By (Used In) Operating Activities	1,730	475	(980)
Drilling and completion costs	(1,848)	(2,113)	(1,192)
Acquisitions of proved and unproved properties	(128)	(88)	(115)
Net Cash Provided By (Used In) Investing Activities	455	(918)	116
As Previously Reported Under Full Cost [Member]
Condensed Cash Flow Statements, Captions [Line Items]
NET INCOME (LOSS)	877	953	(4,399)
Depreciation, depletion and amortization	1,145	995	1,107
Loss on sale of oil and gas properties	578
(Gains) losses on sales of assets	0	0	0
Impairments	53	5	3,025
Exploratory dry hole expense and leasehold impairments	0	0	0
Other	(108)	(135)	(145)
(Decrease) increase in accounts payable, accrued liabilities and other	138	(308)	(757)
Net Cash Provided By (Used In) Operating Activities	2,000	745	(204)
Drilling and completion costs	(1,958)	(2,186)	(1,295)
Acquisitions of proved and unproved properties	(288)	(285)	(788)
Net Cash Provided By (Used In) Investing Activities	185	(1,188)	(660)
Successful Efforts Adjustment [Member]
Condensed Cash Flow Statements, Captions [Line Items]
NET INCOME (LOSS)	(649)	(1,455)	909
Depreciation, depletion and amortization	592	702	591
Loss on sale of oil and gas properties	(578)
(Gains) losses on sales of assets	264	(476)	(212)
Impairments	78	809	(2,462)
Exploratory dry hole expense and leasehold impairments	96	214	1,387
Other	(10)	3	18
(Decrease) increase in accounts payable, accrued liabilities and other	(63)	(67)	(1,007)
Net Cash Provided By (Used In) Operating Activities	(270)	(270)	(776)
Drilling and completion costs	110	73	103
Acquisitions of proved and unproved properties	160	197	673
Net Cash Provided By (Used In) Investing Activities	$ 270	$ 270	$ 776

Change in Accounting Principle - Statements of Shareholders' Equity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018	Jan. 01, 2017	Jan. 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	$ 1,899
Cumulative effect of change in accounting principle						$ (91)
Net income (loss) attributable to Chesapeake	226	$ (505)	$ (3,493)
Chesapeake stockholders’ equity, end of period	2,092	1,899
Stockholders' equity attributable to noncontrolling interest, beginning of period	44
Net income attributable to noncontrolling interests	(2)	(3)	(3)
Stockholders' equity attributable to noncontrolling interest, end of period	41	44
TOTAL EQUITY	2,133	1,943	2,567
As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	(496)
Net income (loss) attributable to Chesapeake	873	949	(4,390)
Chesapeake stockholders’ equity, end of period	344	(496)
Stockholders' equity attributable to noncontrolling interest, beginning of period	124
Net income attributable to noncontrolling interests	(4)	(4)	9
Stockholders' equity attributable to noncontrolling interest, end of period	123	124
TOTAL EQUITY	467	(372)	(1,203)
Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	2,395
Net income (loss) attributable to Chesapeake	(647)	(1,454)	897
Chesapeake stockholders’ equity, end of period	1,748	2,395
Stockholders' equity attributable to noncontrolling interest, beginning of period	(80)
Net income attributable to noncontrolling interests	2	1	(12)
Stockholders' equity attributable to noncontrolling interest, end of period	(82)	(80)
TOTAL EQUITY	1,666	2,315	3,770
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	(14,130)	(13,625)	(13,084)
Cumulative effect of change in accounting principle				$ (8)	$ 0	2,952
Net income (loss) attributable to Chesapeake	226	(505)	(3,493)
Chesapeake stockholders’ equity, end of period	(13,912)	(14,130)	(13,625)
Retained Earnings [Member] \| As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	(16,525)	(17,474)
Cumulative effect of change in accounting principle						0
Net income (loss) attributable to Chesapeake	873	949	(4,390)
Chesapeake stockholders’ equity, end of period	(15,660)	(16,525)	(17,474)
Retained Earnings [Member] \| Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	2,395	3,849
Cumulative effect of change in accounting principle						2,952
Net income (loss) attributable to Chesapeake	(647)	(1,454)	897
Chesapeake stockholders’ equity, end of period	1,748	2,395	3,849
Parent [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	1,899	2,518
Chesapeake stockholders’ equity, end of period	2,092	1,899	2,518
Parent [Member] \| As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	(496)	(1,331)
Chesapeake stockholders’ equity, end of period	344	(496)	(1,331)
Parent [Member] \| Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Chesapeake stockholders’ equity, beginning of period	2,395	3,849
Chesapeake stockholders’ equity, end of period	1,748	2,395	3,849
Noncontrolling Interest [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle						(91)
Stockholders' equity attributable to noncontrolling interest, beginning of period	44	49	141
Net income attributable to noncontrolling interests	(2)	(3)	(3)
Stockholders' equity attributable to noncontrolling interest, end of period	41	44	49
Noncontrolling Interest [Member] \| As Previously Reported Under Full Cost [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle						0
Stockholders' equity attributable to noncontrolling interest, beginning of period	124	128	141
Net income attributable to noncontrolling interests	(4)	(4)	9
Stockholders' equity attributable to noncontrolling interest, end of period	123	124	128
Noncontrolling Interest [Member] \| Successful Efforts Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle						$ (91)
Stockholders' equity attributable to noncontrolling interest, beginning of period	(80)	(79)	0
Net income attributable to noncontrolling interests	2	1	(12)
Stockholders' equity attributable to noncontrolling interest, end of period	$ (82)	$ (80)	$ (79)

Earnings Per Share - Antidilutive Securities Excluded from Computation of EPS Table (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Convertible preferred stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities securities (in shares)	0	1	37
Convertible debt securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities securities (in shares)	146	146	146
Restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities securities (in shares)	1	1	1
Preferred stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities securities (in shares)	60	60	63

Debt - Long-Term Debt (Details)	12 Months Ended
Debt - Long-Term Debt (Details)	Dec. 31, 2018 USD ($) day $ / shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Long-term Debt [Abstract]
Total	$ 8,168,000,000	$ 9,981,000,000
Debt, gross	7,722,000,000	9,973,000,000
Revolving credit facility	(53,000,000)	(63,000,000)
Current maturities of long-term debt, gross	(381,000,000)	(53,000,000)
Current maturities of long-term debt, net	(381,000,000)	(52,000,000)
Long-term debt, net	7,787,000,000	9,928,000,000
Long-term debt, net	7,341,000,000	9,921,000,000
Interest Rate Contract [Member]
Long-term Debt [Abstract]
Total	0	0
Interest rate derivatives	$ 1,000,000	2,000,000
8.00% senior secured second lien notes due 2022 [Member]
Long-term Debt [Abstract]
Unamortized premium		479,000,000
Senior notes [Member]
Long-term Debt [Abstract]
Redemption price percentage	35.00%
Percentage of principal amount redeemed	100.00%
Senior notes [Member] \| 7.25% senior notes due 2018 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	7.25%
Long-term Debt [Abstract]
Total	$ 0	44,000,000
Debt, gross	0	44,000,000
Senior notes [Member] \| Floating rate senior notes due 2019 [Member]
Long-term Debt [Abstract]
Total	380,000,000	380,000,000
Debt, gross	$ 380,000,000	380,000,000
Senior notes [Member] \| 6.625% senior notes due 2020 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	6.625%
Long-term Debt [Abstract]
Total	$ 437,000,000	437,000,000
Debt, gross	$ 437,000,000	437,000,000
Senior notes [Member] \| 6.875% senior notes due 2020 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	6.875%
Long-term Debt [Abstract]
Total	$ 227,000,000	227,000,000
Debt, gross	$ 227,000,000	227,000,000
Senior notes [Member] \| 6.125% senior notes due 2021 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	6.125%
Long-term Debt [Abstract]
Total	$ 548,000,000	548,000,000
Debt, gross	$ 548,000,000	548,000,000
Senior notes [Member] \| 5.375% senior notes due 2021 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	5.375%
Long-term Debt [Abstract]
Total	$ 267,000,000	267,000,000
Debt, gross	$ 267,000,000	267,000,000
Senior notes [Member] \| 4.875% senior notes due 2022 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	4.875%
Long-term Debt [Abstract]
Total	$ 451,000,000	451,000,000
Debt, gross	$ 451,000,000	$ 451,000,000
Senior notes [Member] \| 8.00% senior secured second lien notes due 2022 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	8.00%	8.00%
Long-term Debt [Abstract]
Total	$ 0	$ 1,416,000,000
Debt, gross	$ 0	1,895,000,000
Unamortized premium		374,000,000		$ 60,000,000
Senior notes [Member] \| 5.75% senior notes due 2023 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	5.75%
Long-term Debt [Abstract]
Total	$ 338,000,000	338,000,000
Debt, gross	$ 338,000,000	338,000,000
Senior notes [Member] \| 7.00% senior notes due 2024 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	7.00%
Long-term Debt [Abstract]
Total	$ 850,000,000	0
Debt, gross	$ 850,000,000	$ 0
Senior notes [Member] \| 8.00% senior notes due 2025 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	8.00%	8.00%
Long-term Debt [Abstract]
Total	$ 1,300,000,000	$ 1,300,000,000	$ 1,000,000,000.0
Debt, gross	$ 1,291,000,000	1,290,000,000
Redemption price percentage			98.52%
Senior notes [Member] \| 7.50% senior notes due 2026 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	7.50%
Long-term Debt [Abstract]
Total	$ 400,000,000	0
Debt, gross	$ 400,000,000	$ 0
Senior notes [Member] \| 8.00% senior notes due 2027 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	8.00%	8.00%
Long-term Debt [Abstract]
Total	$ 1,300,000,000	$ 1,300,000,000
Debt, gross	$ 1,299,000,000	$ 1,298,000,000
Redemption price percentage		99.75%
Convertible debt [Member] \| 5.5% convertible senior notes due 2026 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	5.50%
Long-term Debt [Abstract]
Total	$ 1,250,000,000	$ 1,250,000,000
Debt, gross	$ 866,000,000	837,000,000
Interest rate, effective percentage	11.50%
Convertible debt [Member] \| 5.5% convertible senior notes due 2026 [Member] \| Optional Conversion by Holders [Member]
Long-term Debt [Abstract]
Consecutive trading days \| day	5
Threshold percentage of stock price trigger	130.00%
Conversion price (in usd per share) \| $ / shares	$ 8.568
Percentage of principal amount redeemed	100.00%
Convertible debt [Member] \| 5.5% convertible senior notes due 2026 [Member] \| Optional Redemption by the Company [Member]
Long-term Debt [Abstract]
Threshold percentage of stock price trigger	130.00%
Date of first required payment	Sep. 15, 2019
Redemption price percentage	100.00%
Convertible debt [Member] \| 2.25% contingent convertible senior notes due 2038 [Member]
Long-Term Debt Instrument [Line Items]
Interest rate, stated percentage	2.25%
Long-term Debt [Abstract]
Total	$ 1,000,000	9,000,000
Debt, gross	$ 1,000,000	8,000,000
Interest rate, effective percentage	8.00%
Convertible debt [Member] \| All convertible and all contingent convertible debt [Member]
Long-term Debt [Abstract]
Unamortized discount	$ 384,000,000	414,000,000
Term loan [Member]
Long-term Debt [Abstract]
Total	0	1,233,000,000
Debt, gross	0	1,233,000,000
Revolving credit facility	(13,000,000)
Unamortized premium	52,000,000
Revolving credit facility [Member] \| Chesapeake Revolving Credit Facility [Member]
Long-term Debt [Abstract]
Total	419,000,000	781,000,000
Revolving credit facility	$ 419,000,000	$ 781,000,000

Debt - Debt Maturities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Long-term Debt, Fiscal Year Maturity [Abstract]
2019	$ 381
2020	664
2021	815
2022	451
2023	757
Thereafter	5,100
Total	$ 8,168	$ 9,981

Debt - Debt Issuances and Retirements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 17, 2018
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 8,168,000,000	$ 9,981,000,000
Cash paid to purchase debt	2,813,000,000	2,592,000,000	$ 2,734,000,000
Gains (losses) on debt restructuring	263,000,000	233,000,000	236,000,000
Deferred charges	53,000,000	63,000,000
Proceeds from issuance of senior notes, net	$ 1,236,000,000
8.00% senior secured second lien notes due 2022 [Member]
Long-Term Debt Instrument [Line Items]
Premium		479,000,000
Senior notes [Member]
Long-Term Debt Instrument [Line Items]
Percentage of principal amount redeemed	100.00%
Redemption price percentage	35.00%
Senior notes [Member] \| 7.00% senior notes due 2024 and 7.50% senior notes due 2026 [Member]
Long-Term Debt Instrument [Line Items]
Proceeds from debt, net	$ 1,236,000,000
Senior notes [Member] \| 7.00% senior notes due 2024 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 850,000,000	0
Interest rate, stated percentage	7.00%
Senior notes [Member] \| 7.50% senior notes due 2026 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 400,000,000	0
Interest rate, stated percentage	7.50%
Senior notes [Member] \| 8.00% senior secured second lien notes due 2022 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 0	$ 1,416,000,000
Interest rate, stated percentage	8.00%	8.00%
Debt repurchased amount	$ 1,477,000,000
Premium		$ 374,000,000		$ 60,000,000
Gains (losses) on repurchases of debt		233,000,000		331,000,000
Gains (losses) on debt restructuring				$ 391,000,000
Senior notes [Member] \| 7.25% senior notes due 2018 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 0	44,000,000
Interest rate, stated percentage	7.25%
Debt repurchased amount	$ 44,000,000
Senior notes [Member] \| 8.00% senior notes due 2027 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 1,300,000,000	$ 1,300,000,000
Interest rate, stated percentage	8.00%	8.00%
Redemption price percentage		99.75%
Proceeds from issuance of debt		$ 1,285,000,000
Senior notes [Member] \| 8.00% new senior notes due 2025
Long-Term Debt Instrument [Line Items]
Debt, principal		$ 300,000,000
Redemption price percentage		101.25%
Proceeds from issuance of senior notes, net		$ 301,000,000
Senior notes [Member] \| 8.00% senior notes due 2025 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 1,300,000,000	$ 1,300,000,000	$ 1,000,000,000.0
Interest rate, stated percentage	8.00%	8.00%
Redemption price percentage			98.52%
Convertible debt [Member] \| 2.25% contingent convertible senior notes due 2038 [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 1,000,000	$ 9,000,000
Interest rate, stated percentage	2.25%
Debt repurchased amount					$ 8,000,000
Term loan [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 0	1,233,000,000
Debt repurchased amount	1,233,000,000
Cash paid to purchase debt	1,285,000,000
Premium	52,000,000
Gains (losses) on repurchases of debt	(65,000,000)
Deferred charges	$ 13,000,000
senior notes, senior secured second lien notes, contingent convertible notes and term [Member]
Long-Term Debt Instrument [Line Items]
Debt repurchased amount		2,389,000,000
Cash paid to purchase debt		$ 2,592,000,000
June 15, 2020 \| Senior notes [Member] \| 8.00% senior notes due 2027 [Member]
Long-Term Debt Instrument [Line Items]
Percentage of principal amount redeemed		35.00%
Redemption price percentage		108.00%

Debt - Senior Notes and Convertible Senior Notes (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 8,168	$ 9,981
Minimum [Member] \| Convertible debt [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	50
Maximum [Member] \| Convertible debt [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 75

Debt - Revolving Credit Facility (Details)	12 Months Ended
Debt - Revolving Credit Facility (Details)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2018
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 8,168,000,000	$ 9,981,000,000
Gains (losses) on debt restructuring	263,000,000	233,000,000	$ 236,000,000
Chesapeake Revolving Credit Facility [Member]
Long-Term Debt Instrument [Line Items]
Revolving credit, current borrowing capacity		3,000,000,000.0
Revolving credit, maximum borrowing capacity	4,000,000,000.0
Revolving credit, outstanding	107,000,000
Gains (losses) on debt restructuring	$ (3,000,000)
Leverage ratio	4.00								5.50
Chesapeake Revolving Credit Facility [Member] \| Scenario, forecast [Member]
Long-Term Debt Instrument [Line Items]
Leverage ratio				4.00				5.50
Secured leverage ratio				2.50
Fixed charge coverage ratio					2.50	2.25	2.00
Chesapeake Revolving Credit Facility [Member] \| Revolving credit facility [Member]
Long-Term Debt Instrument [Line Items]
Debt, principal	$ 419,000,000	$ 781,000,000
Alternative Base Rate (ABR) [Member] \| Chesapeake Revolving Credit Facility [Member] \| Maximum [Member]
Long-Term Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Alternative Base Rate (ABR) [Member] \| Chesapeake Revolving Credit Facility [Member] \| Minimum [Member]
Long-Term Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) [Member] \| Chesapeake Revolving Credit Facility [Member] \| Maximum [Member]
Long-Term Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
London Interbank Offered Rate (LIBOR) [Member] \| Chesapeake Revolving Credit Facility [Member] \| Minimum [Member]
Long-Term Debt Instrument [Line Items]
Basis spread on variable rate	1.50%

Debt - Fair Value of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 7,787	$ 9,928
Carrying amount [Member] \| Fair value, inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	381	52
Long-term debt	3,495	2,633
Carrying amount [Member] \| Fair value, inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,846	7,286
Estimated fair value [Member] \| Fair value, inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term debt	379	53
Long-term debt	3,173	2,629
Estimated fair value [Member] \| Fair value, inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 3,644	$ 7,301

Contingencies - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
Contingencies - Narrative (Details) - USD ($) $ in Millions	Dec. 20, 2017	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Settlement amount	$ 35
Chaparral Energy, Inc. [Member] \| Healthcare of Ontario Pension Plan (HOOPP) [Member] \| Pending litigation [Member]
Loss Contingencies [Line Items]
Damages sought, value		$ 215

Commitments - Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Due [Abstract]
2019	$ 3
2020	1
Total	4
Operating lease expense	$ 4	$ 3	$ 5

Commitments - Gathering, Processing and Transportation Agreements and Service Contract (Details) $ in Millions	Dec. 31, 2018 USD ($)
Gathering, Processing and Transportation Agreement [Member]
Other Commitment, Fiscal Year Maturity [Abstract]
2019	$ 832
2020	774
2021	683
2022	581
2023	470
2024 – 2034	2,431
Total	5,771
Service Contract [Member]
Other Commitment, Fiscal Year Maturity [Abstract]
2019	5
2020	5
2021	5
Total	$ 15

Other Liabilities - Current Table (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Revenues and royalties due others	$ 687	$ 612
Accrued drilling and production costs	258	216
Joint interest prepayments received	73	74
VPP deferred revenue(a)	59	63
Accrued compensation and benefits	202	214
Other accrued taxes	108	43
Other	212	296
Total other current liabilities	$ 1,599	$ 1,518

Other Liabilities - Long-Term Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities [Abstract]
VPP deferred revenue(a)	$ 63	$ 122
CHK Utica ORRI conveyance obligation	0	156
Unrecognized tax benefits	53	101
Other	103	97
Total other long-term liabilities	219	476
Other income	67	$ 6	$ 5
ORRI [Member]
Other Liabilities [Abstract]
CHK Utica ORRI conveyance obligation	183
Consideration	199
Conveyance obligation, noncurrent	30
Conveyance obligation, current	153
Other income	61
ORRI [Member] \| Oil and Gas Properties [Member]
Other Liabilities [Abstract]
Capitalized costs, proved properties	77
ORRI [Member] \| Liability [Member]
Other Liabilities [Abstract]
Extinguishment of liabilities	$ 122

Capital Lease Obligation (Details) - Midcon Compression, L.L.C. [Member] - Natural gas compressors [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Capital Leased Assets [Line Items]
Lease terms	38 months
Minimum Lease Payments, Sale Leaseback Transactions [Abstract]
2019	$ 10
2020	10
2021	10
Total minimum lease payments	30
Less imputed interest	(3)
Present value of minimum lease payments	27
Less current maturities	(10)
Present value of minimum lease payment, less current maturities	$ 17

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	Jan. 01, 2018	Jan. 01, 2017	Jan. 01, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of change in accounting principle			$ (91)
Retained Earnings [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of change in accounting principle	$ (8)	$ 0	$ 2,952
ASU 2014-09 [Member] \| Retained Earnings [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of change in accounting principle	$ (8)

Revenue Recognition - Impact of Adoption on Balance Sheet and Statement of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	$ 5,189
Marketing [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	5,076
Marketing	5,158	$ 4,598	$ 4,778
Marketing [Member] \| Calculated under revenue guidance in effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	5,871
Marketing	5,953
Marketing [Member] \| Difference between revenue guidance in effect before and after Topic 606 [Member] \| ASU 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	(795)
Marketing	$ (795)

Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 5,189
Gains (losses) on oil, natural gas and NGL derivatives	(34)
Revenues	10,030	$ 10,039	$ 8,705
Marcellus [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	924
Haynesville [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	838
Eagle Ford [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,872
Powder River Basin [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	350
Mid-Continent [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	385
Utica [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	820
Oil [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,201
Gains (losses) on oil, natural gas and NGL derivatives	124
Oil [Member] \| Marcellus [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Oil [Member] \| Haynesville [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2
Oil [Member] \| Eagle Ford [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,514
Oil [Member] \| Powder River Basin [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	244
Oil [Member] \| Mid-Continent [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	246
Oil [Member] \| Utica [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	195
Natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,486
Gains (losses) on oil, natural gas and NGL derivatives	(147)
Natural gas [Member] \| Marcellus [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	924
Natural gas [Member] \| Haynesville [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	836
Natural gas [Member] \| Eagle Ford [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	173
Natural gas [Member] \| Powder River Basin [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	68
Natural gas [Member] \| Mid-Continent [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	84
Natural gas [Member] \| Utica [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	401
NGL [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	502
Gains (losses) on oil, natural gas and NGL derivatives	(11)
NGL [Member] \| Marcellus [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
NGL [Member] \| Haynesville [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
NGL [Member] \| Eagle Ford [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	185
NGL [Member] \| Powder River Basin [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	38
NGL [Member] \| Mid-Continent [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	55
NGL [Member] \| Utica [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	224
Oil, Natural Gas and NGL [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,155	$ 4,985	$ 3,288
Oil, Natural Gas and NGL [Member] \| Oil [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,325
Oil, Natural Gas and NGL [Member] \| Natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,339
Oil, Natural Gas and NGL [Member] \| NGL [Member]
Disaggregation of Revenue [Line Items]
Revenues	491
Marketing [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,390
Revenues	5,076
Marketing [Member] \| Oil [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,740
Revenues	3,197
Marketing [Member] \| Natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,194
Revenues	1,423
Marketing [Member] \| NGL [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	456
Revenues	456
Other marketing revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	686
Other marketing revenue [Member] \| Oil [Member]
Disaggregation of Revenue [Line Items]
Revenues	457
Other marketing revenue [Member] \| Natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenues	229
Other marketing revenue [Member] \| NGL [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0

Revenue Recognition - Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Allowance for doubtful accounts	$ (17)	$ (30)
Accounts receivable, net	1,247	1,322
Oil, Natural Gas and NGL Sales [Member]
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	976	959
Joint interest billings [Member]
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	211	209
Other [Member]
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	$ 77	$ 184

Income Taxes - Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ 0	$ (14)	$ (14)
State	0	5	(5)
Current Income Taxes	0	(9)	(19)
Deferred
Federal	3	13	(147)
State	(13)	(2)	(24)
Deferred Income Taxes	(10)	11	(171)
Total	$ (10)	$ 2	$ (190)

Income Taxes - Effective Income Tax Expense (Benefit) Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense (benefit) at the federal statutory rate (21%, 35%, 35%)	$ 45	$ (175)	$ (1,288)
State income taxes (net of federal income tax benefit)	27	5	33
Remeasurement of deferred tax assets and liabilities	0	931	0
Change in valuation allowance	(97)	(771)	1,042
Other	15	12	23
Total Income Tax Expense (Benefit)	$ (10)	$ 2	$ (190)

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes Summary [Line Items]
Change in valuation allowance	$ (97)	$ (771)	$ 1,042
Net operating loss carryforwards	2,737	2,248
Deferred tax assets	3,231	2,805
Deferred tax assets, valuation allowance	2,011	2,119
Deferred tax assets, valuation allowance, increase (decrease)	$ 108
Noncontrolling interest, ownership percentage	5.00%
Percentage of beneficial ownership	50.00%
Unrecognized tax benefits	$ 79	106	202	$ 280
Unrecognized tax benefits, liabilities with taxing authorities	0	100	$ 111
Uncertain tax positions that would impact effective tax rate	61
Unrecognized tax benefits, accrued liabilities	20	23
Federal [Member]
Income Taxes Summary [Line Items]
NOL carryforward	10,138
Net operating loss carryforwards	2,129
Unrecognized tax benefits, liabilities with taxing authorities		4
State and local [Member]
Income Taxes Summary [Line Items]
NOL carryforward	10,688
Net operating loss carryforwards	608
Unrecognized tax benefits, liabilities with taxing authorities	32	$ 74
Unrecognized tax benefits, receivables with taxing authorities	$ 29

Income Taxes - Deferred Tax Assets and Liabilities Table (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax liabilities:
Property, plant and equipment	$ (976)	$ (580)
Volumetric production payments	(86)	(83)
Carrying value of debt	(95)	0
Derivative instruments	(56)	0
Other	(7)	(20)
Deferred tax liabilities	(1,220)	(683)
Deferred tax assets:
Net operating loss carryforwards	2,737	2,248
Carrying value of debt	0	161
Disallowed business interest carryforward	194	0
Asset retirement obligations	40	42
Investments	111	140
Derivative instruments	0	18
Accrued liabilities	89	125
Other	60	71
Deferred tax assets	3,231	2,805
Valuation allowance	(2,011)	(2,119)
Deferred tax assets after valuation allowance	1,220	686
Net deferred tax assets	$ 0	$ 3

Income Taxes - Unrecognized Tax Benefits Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at beginning of period	$ 106	$ 202	$ 280
Additions based on tax positions related to the current year	0	0	0
Additions to tax positions of prior years	0	4	33
Settlements	0	(100)	(111)
Expiration of the applicable statute of limitations	(23)	0	0
Reductions to tax positions of prior years	(4)	0	0
Unrecognized tax benefits at end of period	$ 79	$ 106	$ 202

Related Parties Transactions - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
FTS International, Inc. [Member]
Related Party Transaction [Line Items]
Related party transaction, expenses	$ 93	$ 111	$ 3

Equity - Common Stock (Details) - shares	12 Months Ended
Equity - Common Stock (Details) - shares	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued, beginning of period (in shares)	908,732,809
Common stock, shares issued, end of period (in shares)	913,715,512	908,732,809
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued, beginning of period (in shares)	908,733,000	896,279,000	664,796,000
Restricted stock issuances (net of forfeitures and cancellations) (in shares)	4,983,000	2,488,000	1,945,000
Common stock, shares issued, end of period (in shares)	913,716,000	908,733,000	896,279,000
Common Stock [Member] \| Preferred stock exchanged for shares of common stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)	0	9,966,000	120,186,000
Common Stock [Member] \| Convertible notes exchanged for shares of common stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)	0	0	55,428,000
Common Stock [Member] \| Senior notes exchanged for shares of common stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)	0	0	53,924,000

Equity - Preferred Stock Conversion Terms (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
5.75% cumulative convertible preferred stock [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate	5.75%	5.75%
5.75% cumulative convertible preferred stock series A [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate	5.75%	5.75%
4.50% cumulative convertible preferred stock [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate	4.50%
5.00% cumulative convertible preferred stock series 2005 B [Member]
Class of Stock [Line Items]
Preferred stock, dividend rate	5.00%	5.00%	5.00%
Preferred stock [Member] \| 5.75% cumulative convertible preferred stock [Member]
Class of Stock [Line Items]
Issue Date	Jun. 01, 2010
Liquidation Preference per Share (in usd per share)	$ 1,000
Holder's Conversion Right	Any time
Conversion Rate	39.6858%
Conversion Price (in usd per share)	$ 25.1979
Company's Conversion Right From	May 17, 2015
Company's Market Conversion Trigger (in usd per share)	$ 32.7573
Preferred stock, dividend rate			5.75%
Preferred stock [Member] \| 5.75% cumulative convertible preferred stock series A [Member]
Class of Stock [Line Items]
Issue Date	May 10, 2010
Liquidation Preference per Share (in usd per share)	$ 1,000
Holder's Conversion Right	Any time
Conversion Rate	38.3508%
Conversion Price (in usd per share)	$ 26.0751
Company's Conversion Right From	May 17, 2015
Company's Market Conversion Trigger (in usd per share)	$ 33.8976
Preferred stock, dividend rate			5.75%
Preferred stock [Member] \| 4.50% cumulative convertible preferred stock [Member]
Class of Stock [Line Items]
Issue Date	Sep. 15, 2005
Liquidation Preference per Share (in usd per share)	$ 100
Holder's Conversion Right	Any time
Conversion Rate	2.4561%
Conversion Price (in usd per share)	$ 40.7152
Company's Conversion Right From	September 15, 2010
Company's Market Conversion Trigger (in usd per share)	$ 52.9298
Preferred stock [Member] \| 5.00% cumulative convertible preferred stock series 2005 B [Member]
Class of Stock [Line Items]
Issue Date	Nov. 15, 2005
Liquidation Preference per Share (in usd per share)	$ 100
Holder's Conversion Right	Any time
Conversion Rate	2.7745%
Conversion Price (in usd per share)	$ 36.0431
Company's Conversion Right From	November 15, 2010
Company's Market Conversion Trigger (in usd per share)	$ 46.8560
Preferred stock [Member] \| Minimum [Member] \| 4.50% or 5.00% (series 2005B) cumulative convertible preferred stock [Member]
Class of Stock [Line Items]
Conversion of stock, market trigger (in shares)	250,000
Preferred stock [Member] \| Minimum [Member] \| 5.75% or 5.75% (Series A) preferred stock [Member]
Class of Stock [Line Items]
Conversion of stock, market trigger (in shares)	25,000

Equity - Preferred Stock and Dividends (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, shares outstanding, beginning of period (in shares)	5,603,458
Preferred stock, shares outstanding, end of period (in shares)	5,603,458	5,603,458
Loss on exchange of preferred stock	$ 0	$ (41)	$ (428)
5.75% cumulative convertible preferred stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, dividend rate	5.75%	5.75%
5.75% cumulative convertible preferred stock series A [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, dividend rate	5.75%	5.75%
4.50% cumulative convertible preferred stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, dividend rate	4.50%
5.00% cumulative convertible preferred stock series 2005 B [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, dividend rate	5.00%	5.00%	5.00%
Preferred stock [Member] \| 5.75% cumulative convertible preferred stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, shares outstanding, beginning of period (in shares)	770,000	843,000	1,497,000
Preferred stock conversions/exchanges (in shares)		(72,600)	(653,872)
Preferred stock, shares outstanding, end of period (in shares)	770,000	770,000	843,000
Preferred stock, dividend rate			5.75%
Preferred stock [Member] \| 5.75% cumulative convertible preferred stock series A [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, shares outstanding, beginning of period (in shares)	463,000	476,000	1,100,000
Preferred stock conversions/exchanges (in shares)		(12,500)	(624,137)
Preferred stock, shares outstanding, end of period (in shares)	463,000	463,000	476,000
Preferred stock, dividend rate			5.75%
Preferred stock [Member] \| 4.50% cumulative convertible preferred stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, shares outstanding, beginning of period (in shares)	2,559,000	2,559,000	2,559,000
Preferred stock conversions/exchanges (in shares)		0	0
Preferred stock, shares outstanding, end of period (in shares)	2,559,000	2,559,000	2,559,000
Preferred stock [Member] \| 5.00% cumulative convertible preferred stock series 2005 B [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock, shares outstanding, beginning of period (in shares)	1,811,000	1,962,000	2,096,000
Preferred stock conversions/exchanges (in shares)		(150,948)	(134,000)
Preferred stock, shares outstanding, end of period (in shares)	1,811,000	1,811,000	1,962,000
Common Stock [Member] \| 5.75% cumulative convertible preferred stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)		7,442,156	59,141,429
Common Stock [Member] \| 5.75% cumulative convertible preferred stock series A [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)		1,205,923	60,032,734
Common Stock [Member] \| 5.00% cumulative convertible preferred stock series 2005 B [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, conversion (in shares)		1,317,756	1,012,032

Equity - AOCI Changes Net of Tax Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	$ (57)
Net other comprehensive income	34	$ 39	$ 3
Accumulated other comprehensive income (loss), ending balance	(23)	(57)
Accumulated net gain (loss) from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	(57)	(96)
Other comprehensive income before reclassifications	0	5
Amounts reclassified from accumulated other comprehensive income	34	34
Net other comprehensive income	34	39
Accumulated other comprehensive income (loss), ending balance	$ (23)	$ (57)	$ (96)

Equity - Noncontrolling Interests Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Noncontrolling interests	$ 41	$ 44
Net income attributable to noncontrolling interests	$ 2	$ 3	$ 3
Noncontrolling Interest, Chesapeake Granite Wash Trust [Member]
Noncontrolling Interest [Line Items]
Common unit, outstanding (in units)	23,750,000
Beneficial interest percent	51.00%

Share-Based Compensation - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) vesting_period shares	Dec. 31, 2017 shares	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value, vested \| $	$ 20
Unrecognized compensation expense \| $	$ 33
Unrecognized compensation expense, weighted average period of recognition	2 years 7 days
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, weighted average period of recognition	1 year 6 months 21 days
Unrecognized compensation, stock options \| $	$ 13
Employee Stock Option [Member] \| Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years	3 years	3 years
Employee Stock Option [Member] \| Management [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration	7 years	7 years	7 years
Employee Stock Option [Member] \| Management [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration	10 years	10 years	10 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares [Member] \| 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Number of vesting periods \| vesting_period	3
Performance Shares [Member] \| 2018 [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	0.00%
Performance Shares [Member] \| 2018 [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout percentage	200.00%
Performance Shares [Member] \| Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares [Member] \| Management [Member] \| 2017 and 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share units maximum payout percentage	200.00%
PSU awards capped payout percentage	100.00%
TSR, terms of award	less than zero
Performance Shares [Member] \| Management [Member] \| 2017 and 2016 [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR component, performance metrics	0.00%
Optional component, performance metrics	0.00%
Performance Shares [Member] \| Management [Member] \| 2017 and 2016 [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR component, performance metrics	100.00%
Optional component, performance metrics	100.00%
2014 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction due to issuance of stock option or SAR (in shares)	1.0
Reduction due to award other than stock option or SAR (in shares)	2.12
Vesting period	10 years
Common stock, reserved for future issuance (in shares)	35,389,825
2014 Long Term Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	71,600,000

Share-Based Compensation - Restricted Stock (Details) - Restricted stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares of Unvested Restricted Stock
Unvested restricted stock, beginning balance (in shares)	13,178	9,092	10,455
Granted (in shares)	6,067	9,872	4,604
Vested (in shares)	(5,808)	(4,573)	(4,692)
Forfeited (in shares)	(1,579)	(1,213)	(1,275)
Unvested restricted stock, ending balance (in shares)	11,858	13,178	9,092
Weighted Average Grant Date Fair Value
Unvested restricted stock, beginning balance (in usd per share)	$ 6.37	$ 11.39	$ 17.31
Granted (in usd per share)	3.73	5.40	4.58
Vested (in usd per share)	7.67	13.73	17.23
Forfeited (in usd per share)	6.02	8.32	13.91
Unvested restricted stock, ending balance (in usd per share)	$ 4.43	$ 6.37	$ 11.39

Share-Based Compensation - Equity-Classified Valuation (Details) - Employee Stock Option [Member]	12 Months Ended
	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected option life – years	6 years
Volatility	63.55%
Risk-free interest rate	2.72%
Dividend yield	0.00%

Share-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions				12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)				16,285	8,593	5,377
Granted (in shares)				3,611	9,226	4,932
Exercised (in shares)				0	0	0
Expired (in shares)				(602)	(435)	(771)
Forfeited (in shares)				(1,198)	(1,099)	(945)
Outstanding, ending balance (in shares)	16,285	8,593	5,377	18,096	16,285	8,593	5,377
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in usd per share)				$ 8.25	$ 11.88	$ 19.37
Granted (in usd per share)				3.01	5.45	3.71
Exercised (in usd per share)				0.00	0.00	0.00
Expired (in usd per share)				13.83	18.50	19.46
Forfeited (in usd per share)				5.45	9.12	5.66
Outstanding, ending balance (in usd per share)	$ 8.25	$ 11.88	$ 19.37	$ 7.20	$ 8.25	$ 11.88	$ 19.37
Options outstanding, weighted average contract life				7 years 1 month 24 days	7 years 8 months 23 days	7 years 2 months 20 days	5 years 9 months 19 days
Options outstanding, aggregate intrinsic value	$ 1	$ 14	$ 0	$ 0	$ 1	$ 14	$ 0
Options exercised, aggregate intrinsic value	$ 0	$ 0	$ 0
Options exercisable, shares underlying options (in shares)	4,474	2,844		8,250	4,474	2,844
Options exercisable, average exercise price per share (in usd per share)	$ 15.15	$ 19.60		$ 10.73	$ 15.15	$ 19.60
Options exercisable, weighted average contract life				5 years 8 months 23 days	5 years 3 months 4 days	5 years 6 months 11 days
Options exercisable, aggregate intrinsic value	$ 0	$ 0		$ 0	$ 0	$ 0

Share-Based Compensation - Equity-Classified Compensation (Details) - Restricted Stock and Stock Options [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 39	$ 61	$ 68
General and administrative expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	31	43	48
Oil and natural gas properties [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	2	5	6
Oil, natural gas and NGL production expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	5	12	13
Exploration expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1	1	0
Marketing expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 0	$ 1

Share-Based Compensation - Liability-Classified Awards Assumptions (Details) - 2017 Awards [Member]	12 Months Ended
	Dec. 31, 2018
Grant Date Assumptions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	80.65%
Risk-free interest rate	1.54%
Dividend yield	0.00%
Reporting Period Assumptions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	64.69%
Risk-free interest rate	2.63%
Dividend yield	0.00%

Share-Based Compensation - Liability-Classified Awards (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018
Performance Shares [Member] \| Award Year 2018, Payable 2019, 2020 and 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units	3,959,647
Fair value	$ 11	$ 12
Vested Liability	$ 0
Performance Shares [Member] \| Award Year 2017, Payable 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units	1,217,774
Fair value	$ 3	8
Vested Liability	$ 1
Performance Shares [Member] \| Award Year 2016, Payable 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units	2,348,893
Fair value	$ 6	10
Vested Liability	$ 4
Cash Restricted Stock Units [Member] \| Award Year 2018, Payable 2019, 2020 and 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units	15,189,197
Fair value	$ 32	$ 46
Vested Liability	$ 0

Share-Based Compensation - Liability-Classified Compensation (Details) - Performance Shares [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 12	$ (4)	$ 15
General and administrative expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	9	(4)	14
Oil and natural gas properties [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1	0	0
Oil, natural gas and NGL production expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	2	0	0
Restructuring and other termination costs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 0	$ 1

Employee Benefit Plans - Narrative (Details)	12 Months Ended
Employee Benefit Plans - Narrative (Details)	Dec. 31, 2018 USD ($) age	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Annual contributions per employee, maximum	75.00%
Performance bonus [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Annual contributions per employee, maximum	100.00%
Chesapeake Energy Corporation Savings and Incentive Stock Bonus Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution	15.00%
Employer contribution amount	$ 31,000,000	$ 35,000,000	$ 39,000,000
Nonqualified deferred compensation plan (DC Plan) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution	15.00%
Employer contribution amount	$ 7,000,000	$ 8,000,000	$ 9,000,000
Base salary threshold to participate in plan	$ 150,000
Employer matching, percent of employees gross pay	100.00%
Age threshold to elect for matching contributions \| age	55
Vesting period based on years of service	5 years

Derivative and Hedging Activities - Narrative (Details) € in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) day counterparty derivative $ / BTU	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) derivative $ / €	Dec. 31, 2017 EUR (€) derivative $ / €
Derivative [Line Items]
Unrealized gain (loss) on derivatives		$ (297,000,000)
Cash collateral for borrowed securities	$ 0		$ 0
Gain (loss) included in accumulated other comprehensive income to net income (loss) during the next 12 months	$ (34,000,000)
Cross Currency Interest Rate Contract [Member] \| 6.25% Euro-Denominated Senior Notes Due 2017 [ Member] \| Senior notes [Member]
Derivative [Line Items]
Interest rate, stated percentage			6.25%	6.25%
Semi annual interest rate swap payments by counterparty \| €				€ 246
Semi annual interest rate swap payments by Chesapeake			$ 327,000,000
Exchange rate (in usd per euro) \| $ / €			1.3325	1.3325
Supply Contract [Member] \| Fair Value, Inputs, Level 3 [Member]
Derivative [Line Items]
Gain (loss) on sale of derivatives		$ 146,000,000
Credit Risk [Member]
Derivative [Line Items]
Number of counterparties in hedge facility \| counterparty	11
Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Derivative [Line Items]
Consideration received	$ 1,868,000,000
Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member] \| Future natural gas prices [Member]
Derivative [Line Items]
Consideration received	$ 100,000,000
Period of trading days \| day	20
Consecutive trading days \| day	30
2022 NYMEX natural gas [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member] \| Future natural gas prices [Member]
Derivative [Line Items]
Consideration received	$ 50,000,000
2022 NYMEX natural gas [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member] \| Future natural gas prices 2022 [Member]
Derivative [Line Items]
Average sales price (in usd per unit) \| $ / BTU	3.00
2022 NYMEX natural gas [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member] \| Future natural gas prices 2023 [Member]
Derivative [Line Items]
Average sales price (in usd per unit) \| $ / BTU	3.25
Designated as hedging instrument [Member]
Derivative [Line Items]
Number of derivative instruments \| derivative	0		0	0

Derivative and Hedging Activities - Derivative Instruments (Details) gal in Millions, MMBbls in Millions, $ in Millions, MMBTU in Trillions	12 Months Ended
	Dec. 31, 2018 USD ($) MMBTU gal MMBbls	Dec. 31, 2017 USD ($) MMBTU gal MMBbls
Derivative [Line Items]
Total derivatives	$ 282	$ (35)
Energy related derivative [Member]
Derivative [Line Items]
Total derivatives	282	(35)
Energy related derivative [Member] \| Utica Shale [Member] \| Future natural gas prices [Member]
Derivative [Line Items]
Total derivatives	$ 7	$ 0
Energy related derivative [Member] \| Oil [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	27	36
Total derivatives	$ 260	$ (183)
Energy related derivative [Member] \| Oil [Member] \| Fixed-Price Swap [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	12	21
Total derivatives	$ 157	$ (151)
Energy related derivative [Member] \| Oil [Member] \| Collar [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	8	0
Total derivatives	$ 98	$ 0
Energy related derivative [Member] \| Oil [Member] \| Three Way Collar [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	0	2
Total derivatives	$ 0	$ (10)
Energy related derivative [Member] \| Oil [Member] \| Call Swaption [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	0	2
Total derivatives	$ 0	$ (13)
Energy related derivative [Member] \| Oil [Member] \| Basis Protection Swap [Member]
Derivative [Line Items]
Notional, volume \| MMBbls	7	11
Total derivatives	$ 5	$ (9)
Energy related derivative [Member] \| Natural gas [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	966	754
Total derivatives	$ 15	$ 150
Energy related derivative [Member] \| Natural gas [Member] \| Fixed-Price Swap [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	623	532
Total derivatives	$ 26	$ 149
Energy related derivative [Member] \| Natural gas [Member] \| Collar [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	55	47
Total derivatives	$ (3)	$ 11
Energy related derivative [Member] \| Natural gas [Member] \| Three Way Collar [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	88	0
Total derivatives	$ 1	$ 0
Energy related derivative [Member] \| Natural gas [Member] \| Call Option [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	44	110
Total derivatives	$ 0	$ (3)
Energy related derivative [Member] \| Natural gas [Member] \| Call Swaption [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	106	0
Total derivatives	$ (9)	$ 0
Energy related derivative [Member] \| Natural gas [Member] \| Basis Protection Swap [Member]
Derivative [Line Items]
Notional, energy measure \| MMBTU	50	65
Total derivatives	$ 0	$ (7)
Energy related derivative [Member] \| NGL [Member] \| Fixed-Price Swap [Member]
Derivative [Line Items]
Notional, volume \| gal	0	33
Total derivatives	$ 0	$ (2)

Derivative and Hedging Activities - Derivative Instruments in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Total derivatives	$ 282	$ (35)
Energy related derivative [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	282	(35)
Not designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	282
Derivative liability, fair value, gross asset	0
Total derivatives	282
Not designated as hedging instrument [Member] \| Commodity contract [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, gross liability		(35)
Derivative liability, fair value, gross asset		0
Total derivatives		(35)
Other current assets [Member] \| Not designated as hedging instrument [Member] \| Commodity contract [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	306	157
Derivative asset, fair value, gross liability	(104)	(130)
Total derivatives	202	27
Other noncurrent assets [Member] \| Not designated as hedging instrument [Member] \| Commodity contract [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	117
Derivative asset, fair value, gross liability	(41)
Total derivatives	76
Other current liabilities [Member] \| Not designated as hedging instrument [Member] \| Commodity contract [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, gross liability	(107)	(188)
Derivative liability, fair value, gross asset	104	130
Total derivatives	(3)	(58)
Other noncurrent liabilities [Member] \| Not designated as hedging instrument [Member] \| Commodity contract [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, gross liability	(41)	(4)
Derivative liability, fair value, gross asset	41	0
Total derivatives	0	$ (4)
Future natural gas prices [Member] \| Other current assets [Member] \| Not designated as hedging instrument [Member] \| Energy related derivative [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	7
Derivative asset, fair value, gross liability	0
Total derivatives	$ 7

Derivative and Hedging Activities - Oil, Natural Gas and NGL Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Gains (losses) on undesignated oil, natural gas and NGL derivatives	$ (34)
Revenues	10,030	$ 10,039	$ 8,705
Oil, Natural Gas and NGL Sales [Member]
Derivative [Line Items]
Losses on terminated cash flow hedges	(34)	(34)	(33)
Oil, Natural Gas and NGL [Member]
Derivative [Line Items]
Results of Operations, Revenue from Oil and Gas Producing Activities		5,189	4,574	$ 3,866
Revenues	5,155	4,985	3,288
Not designated as hedging instrument [Member] \| Oil, Natural Gas and NGL Sales [Member] \| Commodity contract [Member]
Derivative [Line Items]
Gains (losses) on undesignated oil, natural gas and NGL derivatives	$ 0	$ 445	$ (545)

Derivative and Hedging Actitities - Marketing, Gathering and Compression Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Gains (losses) on undesignated oil, natural gas and NGL derivatives	$ (34)
Revenue from contracts with customers	5,189
Revenues	10,030	$ 10,039	$ 8,705
Marketing, Gathering And Compression [Member] \| Supply Contract [Member]
Derivative [Line Items]
Gains (losses) on undesignated oil, natural gas and NGL derivatives	0	0	(297)
Marketing [Member]
Derivative [Line Items]
Revenues		5,069	4,511	$ 4,881
Gains (losses) on undesignated oil, natural gas and NGL derivatives	7	0	0
Revenue from contracts with customers	5,076
Revenues	$ 5,076	$ 4,511	$ 4,584

Derivative and Hedging Activities - Cash Flow Hedges Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance	$ (57)
Accumulated other comprehensive income (loss), net change in fair value, before tax			$ (27)
Accumulated other comprehensive income (loss), net change in fair value, after tax	0	$ 5	(13)
Accumulated other comprehensive income (loss), losses reclassified to income, after tax	34	34	16
Accumulated other comprehensive income (loss), ending balance	(23)	(57)
Cash Flow Hedging [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), before tax, beginning of period	(114)	(153)	(160)
Accumulated other comprehensive income (loss), beginning balance	(57)	(96)	(99)
Accumulated other comprehensive income (loss), net change in fair value, before tax	0	5
Accumulated other comprehensive income (loss), losses reclassified to income, before tax	34	34	34
Accumulated other comprehensive income (loss), losses reclassified to income, after tax	34	34	16
Accumulated other comprehensive income (loss), before tax, end of period	(80)	(114)	(153)
Accumulated other comprehensive income (loss), ending balance	$ (23)	$ (57)	$ (96)

Derivative and Hedging Activities - Fair Value of Recurring Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	$ 282	$ (35)
Commodity contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	422	8
Derivative liability	(147)	(43)
Energy related derivative [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	282	(35)
Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	7
Total derivatives	7	0
Fair value, inputs, Level 1 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	0	0
Fair value, inputs, Level 1 [Member] \| Commodity contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Fair value, inputs, Level 1 [Member] \| Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	0
Fair value, inputs, Level 2 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	188	(20)
Fair value, inputs, Level 2 [Member] \| Commodity contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	319	0
Derivative liability	(131)	(20)
Fair value, inputs, Level 2 [Member] \| Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total derivatives	94	(15)
Fair Value, Inputs, Level 3 [Member] \| Commodity contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	103	8
Derivative liability	(16)	(23)
Total derivatives	87	(15)	$ (10)
Fair Value, Inputs, Level 3 [Member] \| Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	7
Total derivatives	$ 7	$ 0	$ 0

Derivative and Hedging Activities - Fair Value Level 3 Measurements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ (35)
Balance, end of period	282	$ (35)
Energy related derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(35)
Balance, end of period	282	(35)
Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	0
Balance, end of period	7	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(15)
Balance, end of period	94	(15)
Fair Value, Inputs, Level 3 [Member] \| Commodity contract [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(15)	(10)
Total gains (losses) (realized/unrealized): Included in earnings	77	2
Total purchases, issuances, sales and settlements: Settlements	25	(7)
Balance, end of period	87	(15)
Fair Value, Inputs, Level 3 [Member] \| Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	0	0
Total gains (losses) (realized/unrealized): Included in earnings	7	0
Total purchases, issuances, sales and settlements: Settlements	0	0
Balance, end of period	7	0
Oil, Natural Gas and NGL Sales [Member] \| Fair Value, Inputs, Level 3 [Member] \| Commodity contract [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Total gains (losses) (realized/unrealized): Included in earnings	77	2
Change in unrealized gains (losses) related to assets still held at reporting date	86	(14)
Oil, Natural Gas and NGL Sales [Member] \| Fair Value, Inputs, Level 3 [Member] \| Energy related derivative [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Total gains (losses) (realized/unrealized): Included in earnings	7	0
Change in unrealized gains (losses) related to assets still held at reporting date	$ 7	$ 0

Derivative and Hedging Activities - Quantitative Disclosures Level 3 (Details) - Energy related derivative [Member] $ in Millions	Dec. 31, 2018 USD ($)
Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value, asset	$ 7
Oil [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value, asset	98
Natural gas [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value, liability	$ (11)
Weighted Average [Member] \| Measurement input, price volatility [Member] \| Oil [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.3251
Weighted Average [Member] \| Measurement input, price volatility [Member] \| Natural gas [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.2493
Minimum [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.1036
Minimum [Member] \| Oil [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.2370
Minimum [Member] \| Natural gas [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.1288
Maximum [Member] \| Future natural gas prices [Member] \| Utica Shale [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.5766
Maximum [Member] \| Oil [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.4217
Maximum [Member] \| Natural gas [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Measurement input	0.9093

Capitalized Exploratory Well Costs - Changes In Capitalized Well Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in Capitalized Well Costs
Beginning balance	$ 36,000	$ 41,000	$ 48,000
Additions pending the determination of proved reserves	74,000	14,000	15,000
Divestitures and other	0	0	0
Reclassifications to proved properties	(40,000)	(19,000)	(22,000)
Charges to exploration expense	(34,000)	0	0
Ending balance	36,000	36,000	41,000
Exploratory well costs capitalized for a period greater than one year	$ 2,000	$ 32,000	$ 39,000

Capitalized Exploratory Well Costs - Aging of Capitalized Costs (Details) $ in Thousands	Dec. 31, 2018 USD ($) project	Dec. 31, 2017 USD ($) project	Dec. 31, 2016 USD ($) project	Dec. 31, 2015 USD ($)
Extractive Industries [Abstract]
Exploratory well costs capitalized for a period of one year or less	$ 34,000	$ 4,000	$ 2,000
Exploratory well costs capitalized for a period greater than one year	2,000	32,000	39,000
Exploratory well costs capitalized	$ 36,000	$ 36,000	$ 41,000	$ 48,000
Number of projects with exploratory well costs capitalized for a period greater than one year \| project	7	6	5

Oil and Natural Gas Property Transactions - Narrative (Details) MMcf in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) a day well $ / BTU	Dec. 31, 2017 USD ($) a well MMcf	Dec. 31, 2016 USD ($) a well VPP
Business Acquisition [Line Items]
Gain (loss) on sale of oil and natural gas properties	$ 0
Proceeds from divestitures of proved and unproved properties	2,231	$ 1,249	$ 1,406
Payments for restructuring	38
Impairments	$ 131	$ 814	$ 563
Number of VPP transactions \| VPP			4
Corporate VPP [Member]
Business Acquisition [Line Items]
Gain (loss) on sale of oil and natural gas properties			$ 351
Payments to acquire oil and gas property			259
Mid-Continent [Member]
Business Acquisition [Line Items]
Area of land, net (in acres) \| a	238,500
Productive gas wells, number of wells, net \| well	3,200
Gain (loss) on sale of oil and natural gas properties	$ 12
Proceeds from divestitures of proved and unproved properties	491
Haynesville Shale [Member]
Business Acquisition [Line Items]
Area of land, net (in acres) \| a		119,500
Productive gas wells, number of wells, net \| well		576
Gain (loss) on sale of oil and natural gas properties		$ 326
Proceeds from divestitures of proved and unproved properties		$ 915
Payments to acquire oil and gas property			$ 85
Haynesville Shale [Member] \| Natural gas [Member]
Business Acquisition [Line Items]
Proved developed reserves (volume) \| MMcf		80
Other Properties [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties	37	$ 350
Barnett Shale [Member]
Business Acquisition [Line Items]
Area of land, net (in acres) \| a			212,000
Gain (loss) on sale of oil and natural gas properties	$ 192
Proceeds from divestitures of proved and unproved properties			$ 218
Devonian Shale [Member]
Business Acquisition [Line Items]
Area of land, net (in acres) \| a			1,300,000
Proceeds from divestitures of proved and unproved properties			$ 140
Number of wells \| well			5,300
Number of VPP transactions \| VPP			1
Devonian Shale [Member] \| Corporate VPP [Member]
Business Acquisition [Line Items]
Gain (loss) on sale of oil and natural gas properties			$ 47
Payments to acquire oil and gas property			127
Other Noncore [Member]
Business Acquisition [Line Items]
Proceeds from divestitures of proved and unproved properties			1,048
Other, Barnett Shale exit costs, termination of Gathering Agreement [Member]
Business Acquisition [Line Items]
Loss on contract termination			361
Payments for restructuring			58
Impairments			361
Deferred charges			58
Barnett Shale exit costs [Member]
Business Acquisition [Line Items]
Impairments			284
Devonian Shale exit costs [Member]
Business Acquisition [Line Items]
Impairments			$ 142
Oil and Gas Properties [Member] \| Mid-Continent [Member]
Business Acquisition [Line Items]
Assets held-for-sale		$ 128
Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Business Acquisition [Line Items]
Area of land, gross (in acres) \| a	1,500,000
Area of land, net (in acres) \| a	900,000
Productive gas wells, number of wells, net \| well	920
Consideration received	$ 1,868
Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member] \| Synthetic Gas [Member]
Business Acquisition [Line Items]
Net rentable area (in acres) \| a	320,000
Future natural gas prices [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Business Acquisition [Line Items]
Consideration received	$ 100
Period of trading days \| day	20
Consecutive trading days \| day	30
2022 NYMEX natural gas [Member] \| Future natural gas prices [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Business Acquisition [Line Items]
Consideration received	$ 50
Gain (loss) on sale of oil and natural gas properties	$ (273)
2022 NYMEX natural gas [Member] \| Future natural gas prices 2022 [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Business Acquisition [Line Items]
Average sales price (in usd per unit) \| $ / BTU	3.00
2022 NYMEX natural gas [Member] \| Future natural gas prices 2023 [Member] \| Utica Shale [Member] \| Disposal group, disposed of by sale, not discontinued operations [Member]
Business Acquisition [Line Items]
Average sales price (in usd per unit) \| $ / BTU	3.25

Other Property and Equipment - Held for Use and Estimated Useful Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,721	$ 1,986
Less: accumulated depreciation	(630)	(672)
Total other property and equipment, net	1,091	1,314
Accumulated depreciation	630	672
Building and improvements [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,053	1,093
Building and improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	10 years
Building and improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	39 years
Computer equipment [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 353	345
Estimated useful life	5 years
Natural gas compressors [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 48	235
Natural gas compressors [Member] \| Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	3 years
Natural gas compressors [Member] \| Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	20 years
Natural gas compressors, assets held under capital leases [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 27
Less: accumulated depreciation	(1)
Accumulated depreciation	1
Land [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	106	126
Other [Member]
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 161	$ 187
Other [Member] \| Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	5 years
Other [Member] \| Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life	20 years

Investments - Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Proceeds from sales of investments	$ 74	$ 0	$ 0
FTS International, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Investment, ownership percentage	20.00%	29.00%
Investment, realized gain (loss)	$ 61
Number of shares sold (in shares)	4.3
Proceeds from sales of investments	$ 74
Shares owned (in shares)	22.0
FTS International, Inc. [Member] \| IPO [Member]
Schedule of Equity Method Investments [Line Items]
Investment, ownership percentage	24.00%
Investment, realized gain (loss)	$ 78
Sundrop Fuels, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Impairments of investments			$ 119

Impairments - Impairments of Oil and Natural Gas Properties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total impairments of oil and natural gas properties	$ 78	$ 809	$ 102
Impairments due to lower forecasted commodity prices [Member]
Property, Plant and Equipment [Line Items]
Total impairments of oil and natural gas properties	23	27	73
Impairments due to reduction in future development [Member]
Property, Plant and Equipment [Line Items]
Total impairments of oil and natural gas properties	0	560	0
Impairments due to anticipated sale [Member]
Property, Plant and Equipment [Line Items]
Total impairments of oil and natural gas properties	$ 55	$ 222	$ 29

Impairments - Fixed Assets and Other Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Asset impairment	$ 53	$ 5	$ 461
Natural gas compressors [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	45	0	21
Barnett Shale exit costs [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	0	0	284
Devonian Shale exit costs [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	0	0	142
Gathering systems [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	0	0	3
Buildings and land [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	4	5	11
Other [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	$ 4	$ 0	$ 0

Impairments - Narrative (Details) $ in Millions	12 Months Ended
Impairments - Narrative (Details) $ in Millions	Dec. 31, 2018 USD ($) compressor	Dec. 31, 2017 USD ($) compressor	Dec. 31, 2016 USD ($) compressor
Property, Plant and Equipment [Line Items]
Asset impairment	$ 53	$ 5	$ 461
Natural gas compressors, difference between carrying value and fair value [Member]
Property, Plant and Equipment [Line Items]
Asset impairment	$ 45		$ 8
Equipment, number of units \| compressor	890		155
Natural gas compressors, obsolete [Member]
Property, Plant and Equipment [Line Items]
Asset impairment		$ 13
Equipment, number of units \| compressor		205
Barnett Shale exit costs [Member]
Property, Plant and Equipment [Line Items]
Impairment charge			$ 284
Devonian Shale exit costs [Member]
Property, Plant and Equipment [Line Items]
Impairment charge			$ 142

Other Operating Expenses - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Transportation equipment [Member] \| Natural gas [Member]
Property, Plant and Equipment [Line Items]
Loss on contract termination	$ 126
Transportation equipment [Member] \| Oil [Member]
Property, Plant and Equipment [Line Items]
Loss on contract termination	$ 290
Other, Barnett Shale exit costs, termination of Gathering Agreement [Member]
Property, Plant and Equipment [Line Items]
Loss on contract termination		$ 361

Restructuring and Other Termination Costs (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring and other termination costs, number of positions eliminated, period percent		13.00%
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2017		$ 0
Restructuring and other termination costs	$ 38	38	$ 0	$ 6
Termination benefits paid		(38)
Balance as of December 31, 2018		$ 0	$ 0

Fair Value Measurements - Assets and Liabilities Table (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	$ (1)	$ (3)
Other current assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current assets	50	57
Other current liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current liabilities	(51)	(60)
Fair value, inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	(1)	(3)
Fair value, inputs, Level 1 [Member] \| Other current assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current assets	50	57
Fair value, inputs, Level 1 [Member] \| Other current liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current liabilities	(51)	(60)
Fair value, inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	0	0
Fair value, inputs, Level 2 [Member] \| Other current assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current assets	0	0
Fair value, inputs, Level 2 [Member] \| Other current liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current liabilities	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total	0	0
Fair Value, Inputs, Level 3 [Member] \| Other current assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current assets	0	0
Fair Value, Inputs, Level 3 [Member] \| Other current liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other current liabilities	$ 0	$ 0

Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligations, beginning of period	$ 166	$ 177	$ 166	$ 177	$ 261
Additions	3	5
Revisions	11	(34)
Settlements and disposals	(35)	(70)
Accretion expense	10	15
Asset retirement obligations, end of period	$ 166	$ 177
Less current portion			11	15
Asset retirement obligation, long-term			$ 155	$ 162

Major Customers - Narrative (Details) - segment	12 Months Ended
Major Customers - Narrative (Details) - segment	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Major Customer [Line Items]
Number of reportable segments	1
Valero Energy Corporation [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%
Royal Dutch Shell PLC [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		10.00%
BP PLC [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			10.00%

Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 4	$ 5	$ 882	$ 825
Other current assets	1,594	1,521
Intercompany receivable, net	0	0
Total Current Assets	1,598	1,526
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on full cost accounting, net	9,712	11,721
Other property and equipment, net	1,091	1,314
Property and equipment held for sale, net	15	144
Total Property and Equipment, Net	10,818	13,179
LONG-TERM ASSETS:
Other long-term assets	319	220
Investments in subsidiaries and intercompany advances	0	0
TOTAL ASSETS	12,735	14,925
CURRENT LIABILITIES:
Current liabilities	2,887	2,419
Intercompany payable, net	0	0
Total Current Liabilities	2,887	2,419
LONG-TERM LIABILITIES:
Long-term debt, net	7,341	9,921
Other long-term liabilities	374	642
Total Long-Term Liabilities	7,715	10,563
EQUITY:
Chesapeake stockholders’ equity	2,092	1,899
Noncontrolling interests	41	44
Total Equity	2,133	1,943	2,567
TOTAL LIABILITIES AND EQUITY	12,735	14,925
Eliminations [Member]
CURRENT ASSETS:
Cash and cash equivalents	(2)	(3)	(25)
Other current assets	0	(1)
Intercompany receivable, net	(6,671)	(9,133)
Total Current Assets	(6,673)	(9,137)
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on full cost accounting, net	0	0
Other property and equipment, net	0	0
Property and equipment held for sale, net	0	0
Total Property and Equipment, Net	0	0
LONG-TERM ASSETS:
Other long-term assets	0	0
Investments in subsidiaries and intercompany advances	(3,257)	(3,163)
TOTAL ASSETS	(9,930)	(12,300)
CURRENT LIABILITIES:
Current liabilities	(2)	(4)
Intercompany payable, net	(6,671)	(9,133)
Total Current Liabilities	(6,673)	(9,137)
LONG-TERM LIABILITIES:
Long-term debt, net	0	0
Other long-term liabilities	0	0
Total Long-Term Liabilities	0	0
EQUITY:
Chesapeake stockholders’ equity	(3,257)	(3,163)
Noncontrolling interests	0	0
Total Equity	(3,257)	(3,163)
TOTAL LIABILITIES AND EQUITY	(9,930)	(12,300)
Parent [Member] \| Reportable legal entities [Member]
CURRENT ASSETS:
Cash and cash equivalents	4	5	904
Other current assets	60	154
Intercompany receivable, net	6,671	8,699
Total Current Assets	6,735	8,858
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on full cost accounting, net	0	0
Other property and equipment, net	0	0
Property and equipment held for sale, net	0	0
Total Property and Equipment, Net	0	0
LONG-TERM ASSETS:
Other long-term assets	26	52
Investments in subsidiaries and intercompany advances	3,248	3,201
TOTAL ASSETS	10,009	12,111
CURRENT LIABILITIES:
Current liabilities	523	190
Intercompany payable, net	0	0
Total Current Liabilities	523	190
LONG-TERM LIABILITIES:
Long-term debt, net	7,341	9,921
Other long-term liabilities	53	101
Total Long-Term Liabilities	7,394	10,022
EQUITY:
Chesapeake stockholders’ equity	2,092	1,899
Noncontrolling interests	0	0
Total Equity	2,092	1,899
TOTAL LIABILITIES AND EQUITY	10,009	12,111
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
CURRENT ASSETS:
Cash and cash equivalents	1	1	2
Other current assets	1,532	1,365
Intercompany receivable, net	0	434
Total Current Assets	1,533	1,800
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on full cost accounting, net	9,664	11,666
Other property and equipment, net	1,091	1,314
Property and equipment held for sale, net	15	144
Total Property and Equipment, Net	10,770	13,124
LONG-TERM ASSETS:
Other long-term assets	293	168
Investments in subsidiaries and intercompany advances	9	(38)
TOTAL ASSETS	12,605	15,054
CURRENT LIABILITIES:
Current liabilities	2,365	2,231
Intercompany payable, net	6,671	9,081
Total Current Liabilities	9,036	11,312
LONG-TERM LIABILITIES:
Long-term debt, net	0	0
Other long-term liabilities	321	541
Total Long-Term Liabilities	321	541
EQUITY:
Chesapeake stockholders’ equity	3,248	3,201
Noncontrolling interests	0	0
Total Equity	3,248	3,201
TOTAL LIABILITIES AND EQUITY	12,605	15,054
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
CURRENT ASSETS:
Cash and cash equivalents	1	2	$ 1
Other current assets	2	3
Intercompany receivable, net	0	0
Total Current Assets	3	5
PROPERTY AND EQUIPMENT:
Oil and natural gas properties at cost, based on full cost accounting, net	48	55
Other property and equipment, net	0	0
Property and equipment held for sale, net	0	0
Total Property and Equipment, Net	48	55
LONG-TERM ASSETS:
Other long-term assets	0	0
Investments in subsidiaries and intercompany advances	0	0
TOTAL ASSETS	51	60
CURRENT LIABILITIES:
Current liabilities	1	2
Intercompany payable, net	0	52
Total Current Liabilities	1	54
LONG-TERM LIABILITIES:
Long-term debt, net	0	0
Other long-term liabilities	0	0
Total Long-Term Liabilities	0	0
EQUITY:
Chesapeake stockholders’ equity	9	(38)
Noncontrolling interests	41	44
Total Equity	50	6
TOTAL LIABILITIES AND EQUITY	$ 51	$ 60

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES AND OTHER:
Revenues		$ 10,030	$ 10,039	$ 8,705
Gains (losses) on sales of assets		(264)	476	626
OPERATING EXPENSES:
Production taxes		124	89	74
General and administrative		335	333	322
Restructuring and other termination costs	$ 38	38	0	6
Provision for legal contingencies, net		26	(38)	123
Depreciation, depletion and amortization		1,737	1,697	1,698
Gain (loss) on sale of oil and natural gas properties		0
Impairments		131	814	563
Other operating expenses		0	416	377
Total Operating Expenses		9,648	10,177	11,961
INCOME (LOSS) FROM OPERATIONS		382	(138)	(3,256)
OTHER INCOME (EXPENSE):
Interest expense		(633)	(601)	(528)
Gains on investments		139	0	(137)
Gains on purchases or exchanges of debt		263	233	236
Other income		67	6	5
Equity in net earnings of subsidiary		0	0
Total Other Expense		(164)	(362)	(424)
INCOME (LOSS) BEFORE INCOME TAXES		218	(500)	(3,680)
Total Income Tax Expense (Benefit)		(10)	2	(190)
NET INCOME (LOSS)		228	(502)	(3,490)
Net income attributable to noncontrolling interests		(2)	(3)	(3)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		226	(505)	(3,493)
Other comprehensive income		34	39	3
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		260	(466)	(3,490)
Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues		5,155	4,985	3,288
Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services		539	562	710
Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services		1,398	1,471	1,855
Marketing [Member]
REVENUES AND OTHER:
Revenues		5,076	4,511	4,584
OPERATING EXPENSES:
Cost of goods and services		5,158	4,598	4,778
Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues		10,231	9,496	7,872
Other [Member]
REVENUES AND OTHER:
Revenues		63	67	207
Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services		162	235	$ 1,455
Reportable legal entities [Member] \| Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Eliminations [Member]
REVENUES AND OTHER:
Revenues		0	0
Gains (losses) on sales of assets		0	0
OPERATING EXPENSES:
Production taxes		0	0
General and administrative		0	0
Restructuring and other termination costs		0
Provision for legal contingencies, net		0	0
Depreciation, depletion and amortization		0	0
Impairments		0	0
Other operating expenses			0
Total Operating Expenses		0	0
INCOME (LOSS) FROM OPERATIONS		0	0
OTHER INCOME (EXPENSE):
Interest expense		0	0
Gains on investments		0
Gains on purchases or exchanges of debt		0	0
Other income		0	0
Equity in net earnings of subsidiary		(584)	216
Total Other Expense		(584)	216
INCOME (LOSS) BEFORE INCOME TAXES		(584)	216
Total Income Tax Expense (Benefit)		0	0
NET INCOME (LOSS)		(584)	216
Net income attributable to noncontrolling interests		0	0
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		(584)	216
Other comprehensive income		0	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		(584)	216
Eliminations [Member] \| Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues		0	0
Eliminations [Member] \| Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Eliminations [Member] \| Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Eliminations [Member] \| Marketing [Member]
REVENUES AND OTHER:
Revenues		0	0
OPERATING EXPENSES:
Cost of goods and services		0	0
Eliminations [Member] \| Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues			0
Eliminations [Member] \| Other [Member]
REVENUES AND OTHER:
Revenues		0	0
Eliminations [Member] \| Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Parent [Member] \| Reportable legal entities [Member]
REVENUES AND OTHER:
Revenues		0	0
Gains (losses) on sales of assets		0	0
OPERATING EXPENSES:
Production taxes		0	0
General and administrative		2	1
Restructuring and other termination costs		0
Provision for legal contingencies, net		0	(79)
Depreciation, depletion and amortization		0	0
Impairments		0	0
Other operating expenses			0
Total Operating Expenses		2	(78)
INCOME (LOSS) FROM OPERATIONS		(2)	78
OTHER INCOME (EXPENSE):
Interest expense		(631)	(599)
Gains on investments		0
Gains on purchases or exchanges of debt		263	233
Other income		3	1
Equity in net earnings of subsidiary		583	(216)
Total Other Expense		218	(581)
INCOME (LOSS) BEFORE INCOME TAXES		216	(503)
Total Income Tax Expense (Benefit)		(10)	2
NET INCOME (LOSS)		226	(505)
Net income attributable to noncontrolling interests		0	0
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		226	(505)
Other comprehensive income		0	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		226	(505)
Parent [Member] \| Reportable legal entities [Member] \| Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues		0	0
Parent [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Parent [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Parent [Member] \| Reportable legal entities [Member] \| Marketing [Member]
REVENUES AND OTHER:
Revenues		0	0
OPERATING EXPENSES:
Cost of goods and services		0	0
Parent [Member] \| Reportable legal entities [Member] \| Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues		0	0
Parent [Member] \| Reportable legal entities [Member] \| Other [Member]
REVENUES AND OTHER:
Revenues		0	0
Parent [Member] \| Reportable legal entities [Member] \| Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
REVENUES AND OTHER:
Revenues		10,011	10,016
Gains (losses) on sales of assets		(264)	476
OPERATING EXPENSES:
Production taxes		123	88
General and administrative		332	330
Restructuring and other termination costs		38
Provision for legal contingencies, net		26	41
Depreciation, depletion and amortization		1,730	1,688
Impairments		131	814
Other operating expenses			416
Total Operating Expenses		9,630	10,235
INCOME (LOSS) FROM OPERATIONS		381	(219)
OTHER INCOME (EXPENSE):
Interest expense		(2)	(2)
Gains on investments		139
Gains on purchases or exchanges of debt		0	0
Other income		64	5
Equity in net earnings of subsidiary		1	0
Total Other Expense		202	3
INCOME (LOSS) BEFORE INCOME TAXES		583	(216)
Total Income Tax Expense (Benefit)		0	0
NET INCOME (LOSS)		583	(216)
Net income attributable to noncontrolling interests		0	0
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		583	(216)
Other comprehensive income		34	39
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		617	(177)
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues		5,136	4,962
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services		539	562
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services		1,391	1,463
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Marketing [Member]
REVENUES AND OTHER:
Revenues		5,076	4,511
OPERATING EXPENSES:
Cost of goods and services		5,158	4,598
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues		10,212	9,473
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Other [Member]
REVENUES AND OTHER:
Revenues		63	67
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Exploration [Member]
OPERATING EXPENSES:
Cost of goods and services		162	235
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
REVENUES AND OTHER:
Revenues		19	23
Gains (losses) on sales of assets		0	0
OPERATING EXPENSES:
Production taxes		1	1
General and administrative		1	2
Restructuring and other termination costs		0
Provision for legal contingencies, net		0	0
Depreciation, depletion and amortization		7	9
Impairments		0	0
Other operating expenses			0
Total Operating Expenses		16	20
INCOME (LOSS) FROM OPERATIONS		3	3
OTHER INCOME (EXPENSE):
Interest expense		0	0
Gains on investments		0
Gains on purchases or exchanges of debt		0	0
Other income		0	0
Equity in net earnings of subsidiary		0	0
Total Other Expense		0	0
INCOME (LOSS) BEFORE INCOME TAXES		3	3
Total Income Tax Expense (Benefit)		0	0
NET INCOME (LOSS)		3	3
Net income attributable to noncontrolling interests		(2)	(3)
NET INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		1	0
Other comprehensive income		0	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO CHESAPEAKE		1	0
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, Natural Gas and NGL [Member]
REVENUES AND OTHER:
Revenues		19	23
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL production [Member]
OPERATING EXPENSES:
Cost of goods and services		0	0
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, natural gas and NGL gathering, processing and transportation [Member]
OPERATING EXPENSES:
Cost of goods and services		7	8
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Marketing [Member]
REVENUES AND OTHER:
Revenues		0	0
OPERATING EXPENSES:
Cost of goods and services		0	0
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Oil, Natural gas and NGL and Marketing [Member]
REVENUES AND OTHER:
Revenues		19	23
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member] \| Other [Member]
REVENUES AND OTHER:
Revenues		$ 0	$ 0

Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By (Used In) Operating Activities	$ 1,730	$ 475	$ (980)
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(1,848)	(2,113)	(1,192)
Acquisitions of proved and unproved properties	(128)	(88)	(115)
Proceeds from divestitures of proved and unproved properties	2,231	1,249	1,406
Additions to other property and equipment	(21)	(21)	(37)
Proceeds from sales of other property and equipment	147	55	131
Proceeds from sales of investments	74	0	0
Net Cash Provided By (Used In) Investing Activities	455	(918)	116
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	11,697	7,771	5,146
Payments on revolving credit facility borrowings	(12,059)	(6,990)	(5,146)
Proceeds from issuance of senior notes, net	1,236
Proceeds from issuance of senior notes, net	1,236	1,585	2,210
Cash paid to purchase debt	(2,813)	(2,592)	(2,734)
Cash paid for preferred stock dividends	(92)	(183)	0
Other financing activities	(155)	(25)
Intercompany advances, net	0	0
Net Cash Provided By (Used In) Financing Activities	(2,186)	(434)	921
Net increase (decrease) in cash and cash equivalents	(1)	(877)	57
Cash and cash equivalents, beginning of period	5	882	825
Cash and cash equivalents, end of period	4	5	882
Eliminations [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By (Used In) Operating Activities	(7)	(10)
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	0	0
Acquisitions of proved and unproved properties	0	0
Proceeds from divestitures of proved and unproved properties	0	0
Additions to other property and equipment	0	0
Proceeds from sales of other property and equipment	0	0
Proceeds from sales of investments	0
Net Cash Provided By (Used In) Investing Activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	0	0
Payments on revolving credit facility borrowings	0	0
Proceeds from issuance of senior notes, net	0
Proceeds from issuance of senior notes, net		0
Cash paid to purchase debt	0	0
Cash paid for preferred stock dividends	0	0
Other financing activities	7	32
Intercompany advances, net	1	0
Net Cash Provided By (Used In) Financing Activities	8	32
Net increase (decrease) in cash and cash equivalents	1	22
Cash and cash equivalents, beginning of period	(3)	(25)
Cash and cash equivalents, end of period	(2)	(3)	(25)
Parent [Member] \| Reportable legal entities [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By (Used In) Operating Activities	85	5
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	0	0
Acquisitions of proved and unproved properties	0	0
Proceeds from divestitures of proved and unproved properties	0	0
Additions to other property and equipment	0	0
Proceeds from sales of other property and equipment	0	0
Proceeds from sales of investments	0
Net Cash Provided By (Used In) Investing Activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	11,697	7,771
Payments on revolving credit facility borrowings	(12,059)	(6,990)
Proceeds from issuance of senior notes, net	1,236
Proceeds from issuance of senior notes, net		1,585
Cash paid to purchase debt	(2,813)	(2,592)
Cash paid for preferred stock dividends	(92)	(183)
Other financing activities	(26)	(39)
Intercompany advances, net	1,971	(456)
Net Cash Provided By (Used In) Financing Activities	(86)	(904)
Net increase (decrease) in cash and cash equivalents	(1)	(899)
Cash and cash equivalents, beginning of period	5	904
Cash and cash equivalents, end of period	4	5	904
Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By (Used In) Operating Activities	1,642	466
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(1,848)	(2,113)
Acquisitions of proved and unproved properties	(128)	(88)
Proceeds from divestitures of proved and unproved properties	2,231	1,249
Additions to other property and equipment	(21)	(21)
Proceeds from sales of other property and equipment	147	55
Proceeds from sales of investments	74
Net Cash Provided By (Used In) Investing Activities	455	(918)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	0	0
Payments on revolving credit facility borrowings	0	0
Proceeds from issuance of senior notes, net	0
Proceeds from issuance of senior notes, net		0
Cash paid to purchase debt	0	0
Cash paid for preferred stock dividends	0	0
Other financing activities	(123)	(5)
Intercompany advances, net	(1,974)	456
Net Cash Provided By (Used In) Financing Activities	(2,097)	451
Net increase (decrease) in cash and cash equivalents	0	(1)
Cash and cash equivalents, beginning of period	1	2
Cash and cash equivalents, end of period	1	1	2
Non-Guarantor Subsidiaries [Member] \| Reportable legal entities [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By (Used In) Operating Activities	10	14
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	0	0
Acquisitions of proved and unproved properties	0	0
Proceeds from divestitures of proved and unproved properties	0	0
Additions to other property and equipment	0	0
Proceeds from sales of other property and equipment	0	0
Proceeds from sales of investments	0
Net Cash Provided By (Used In) Investing Activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	0	0
Payments on revolving credit facility borrowings	0	0
Proceeds from issuance of senior notes, net	0
Proceeds from issuance of senior notes, net		0
Cash paid to purchase debt	0	0
Cash paid for preferred stock dividends	0	0
Other financing activities	(13)	(13)
Intercompany advances, net	2	0
Net Cash Provided By (Used In) Financing Activities	(11)	(13)
Net increase (decrease) in cash and cash equivalents	(1)	1
Cash and cash equivalents, beginning of period	2	1
Cash and cash equivalents, end of period	$ 1	$ 2	$ 1

Condensed Consolidating Financial Information - Narrative (Details)	Dec. 31, 2018
Senior notes [Member]
Condensed Financial Statements, Captions [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%

Subsequent Events - Narrative (Details) - USD ($) $ in Millions	Feb. 01, 2019	Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)			2,000,000,000	2,000,000,000
Subsequent event [Member]
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)		3,000,000,000
Subsequent event [Member] \| Wildhorse Resource Development Corporation [Member]
Subsequent Event [Line Items]
Acquisition, consideration transferred, common stock (in shares)	$ 717.3
Acquisition, consideration transferred, cash	381.0
Acquisition, debt assumed	$ 1,400.0