Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ (1,230)	$ (3,362)	$ 900
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	572	917	903
Deferred tax provision (benefit)	13	(1,602)	509
Stock-based compensation	22	25	28
Unrealized (gain) loss on derivative contracts	392	246	(649)
Gain on sale of Malaysia business	0	0	(373)
Ceiling test and other impairments	1,028	4,904	0
Other, net	13	43	21
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	22	83	47
Increase (decrease) in accounts payable and accrued liabilities	(3)	(45)	21
Other items, net	(3)	0	(20)
Net cash provided by (used in) operating activities	826	1,209	1,387
Cash flows from investing activities:
Additions to oil and gas properties	(868)	(1,607)	(2,064)
Acquisitions of oil and gas properties	(486)	(125)	(33)
Proceeds from sales of oil and gas properties	405	90	620
Proceeds received from sale of Malaysia business, net	0	0	809
Additions to other property and equipment	(17)	(13)	(31)
Redemptions of investments	0	0	39
Proceeds from insurance settlement, net	0	57	0
Purchases of investments	(25)	0	0
Net cash provided by (used in) investing activities	(991)	(1,598)	(660)
Cash flows from financing activities:
Proceeds from borrowings under credit arrangements	536	1,908	2,949
Repayments of borrowings under credit arrangements	(575)	(2,315)	(3,152)
Proceeds from issuance of senior notes	0	691	0
Repayment of senior subordinated notes	0	(700)	(600)
Debt issue costs	0	(8)	0
Proceeds from issuances of common stock, net	779	819	6
Purchases of treasury stock, net	(22)	(12)	(11)
Other	(3)	(3)	0
Net cash provided by (used in) financing activities	715	380	(808)
Increase (decrease) in cash and cash equivalents	550	(9)	(81)
Cash and cash equivalents, beginning of period	5	14	95
Cash and cash equivalents, end of period	$ 555	$ 5	$ 14