CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ 953	$ (4,399)	$ (14,635)
ADJUSTMENTS TO RECONCILE NET INCOME (LOSS) TO CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Depreciation, depletion and amortization	995	1,107	2,229
Deferred income tax expense (benefit)	11	(171)	(4,427)
Derivative (gains) losses, net	(409)	739	(932)
Cash receipts (payments) on derivative settlements, net	(18)	448	1,123
Stock-based compensation	49	52	78
Impairment of oil and natural gas properties	0	2,564	18,238
Net (gains) losses on sales of fixed assets	(3)	(12)	4
Renegotiation of natural gas gathering contracts	0	(115)	0
Impairments of fixed assets and other	4	467	175
Losses on investments	0	8	96
Loss on sale of investment	0	10	0
Impairments of investments	0	119	53
Gains on purchases or exchanges of debt	(235)	(236)	(304)
Restructuring and other termination costs	0	3	(14)
Provision for legal contingencies, net	(42)	87	340
Other	(89)	(114)	244
(Increase) decrease in accounts receivable and other assets	(163)	(4)	1,186
Decrease in accounts payable, accrued liabilities and other	(308)	(757)	(2,220)
Net Cash Provided By (Used In) Operating Activities	745	(204)	1,234
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(2,186)	(1,295)	(3,095)
Acquisitions of proved and unproved properties	(285)	(788)	(533)
Proceeds from divestitures of proved and unproved properties	1,249	1,406	189
Additions to other property and equipment	(21)	(37)	(143)
Proceeds from sales of other property and equipment	55	131	89
Cash paid for title defects	0	(69)	0
Additions to investments	0	0	(1)
Decrease in restricted cash	0	0	52
Other	0	(8)	(9)
Net Cash Used In Investing Activities	(1,188)	(660)	(3,451)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	7,771	5,146	0
Payments on revolving credit facility borrowings	(6,990)	(5,146)	0
Proceeds from issuance of senior notes, net	1,585	2,210	0
Proceeds from issuance of term loan, net	0	1,476	0
Cash paid to purchase debt	(2,592)	(2,734)	(508)
Cash paid for common stock dividends	0	0	(118)
Cash paid for preferred stock dividends	(183)	0	(171)
Cash paid to repurchase noncontrolling interest of CHK C-T	0	0	(143)
Distributions to noncontrolling interest owners	(8)	(10)	(85)
Other	(17)	(21)	(41)
Net Cash Provided By (Used In) Financing Activities	(434)	921	(1,066)
Net increase (decrease) in cash and cash equivalents	(877)	57	(3,283)
Cash and cash equivalents, beginning of period	882	825	4,108
Cash and cash equivalents, end of period	5	882	825
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of capitalized interest	492	344	235
Income taxes paid, net of refunds received	(16)	(27)	44
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Divestiture of proved and unproved CHK-C-T properties	0	0	1,024
Debt exchanged for common stock	0	471	0
Repurchase of noncontrolling interest, Non-Cash Investing and Financing Activities	0	0	872
Change In Accrued Drilling And Completion Costs [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrued drilling and completion costs	14	(23)	(148)
Change In Accrued Acquisitions Of Proved And Unproved Properties [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrued drilling and completion costs	9	(13)	55
Change In Divested Proved And Unproved Properties [Member]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrued drilling and completion costs	$ (57)	$ 52	$ 35