Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
CASH FLOW FROM OPERATING ACTIVITIES
Net income (loss)	$ 37	$ (127)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	372	412
Net derivative loss (gain) from commodity contracts	259	(51)
Net (payments) proceeds on settled commodity derivatives	(178)	15
Net gain on early extinguishment of debt	(26)	(4)
Amortization of deferred gain	(58)	(55)
Gain on asset divestitures	(4)	(21)
Other non-cash charges to income, net	78	46
Dry hole expenses	4	1
Changes in operating assets and liabilities, net	(91)	9
Net cash provided by operating activities	393	225
CASH FLOW FROM INVESTING ACTIVITIES
Capital investments	(504)	(232)
Changes in capital investment accruals	40	26
Asset divestitures	17	33
Acquisitions	(514)
Other	(4)	(1)
Net cash used in investing activities	(965)	(174)
CASH FLOW FROM FINANCING ACTIVITIES
Proceeds from 2014 Revolving Credit Facility	1,822	1,000
Repayments of 2014 Revolving Credit Facility	(1,843)	(1,010)
Payments on 2014 Term Loan		(91)
Debt repurchases	(149)	(24)
Debt transaction costs	(4)	(2)
Contributions from noncontrolling interest holders, net	796	98
Distributions paid to noncontrolling interest holders	(80)	(6)
Issuance of common stock	52	2
Shares canceled for taxes	(11)	(2)
Net cash provided (used) by financing activities	583	(35)
Increase in cash	11	16
Cash-beginning of period	20	12
Cash-end of period	$ 31	$ 28

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Balance Type:	debit
Period Type:	duration