Statement of Consolidated 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)	$ (6,076)	$ (3,007)	$ 2,374
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
(Gains) losses on asset sales, net	(23)	(51)	(823)
Depreciation, depletion and amortization	3,244	3,955	3,224
Impairment	67	1,616	0
Loss from equity affiliates	0	25	84
Exploratory dry hole costs	1,064	410	301
Exploration lease and other impairment	145	182	207
Stock compensation expense	73	97	87
Provision (benefit) for deferred income taxes and other tax accruals	2,200	(1,319)	270
Loss on debt extinguishment	148	0	0
(Income) loss from discontinued operations, net of income taxes	0	48	(682)
Changes in operating assets and liabilities
(Increase) decrease in accounts receivable	96	841	(199)
(Increase) decrease in inventories	77	29	62
Increase (decrease) in accounts payable and accrued liabilities	(87)	(424)	79
Increase (decrease) in taxes payable	9	(222)	(108)
Changes in other operating assets and liabilities	(142)	(164)	(372)
Cash provided by (used in) operating activities - continuing operations	795	2,016	4,504
Cash provided by (used in) operating activities - discontinued operations	0	(35)	(47)
Net cash provided by (used in) operating activities	795	1,981	4,457
Cash Flows From Investing Activities
Additions to property, plant and equipment - E&P	(1,979)	(3,956)	(4,867)
Additions to property, plant and equipment - Bakken Midstream	(272)	(365)	(347)
Proceeds from asset sales	140	50	2,978
Other, net	21	(44)	(192)
Cash provided by (used in) investing activities - continuing operations	(2,090)	(4,315)	(2,428)
Cash provided by (used in) investing activities - discontinued operations	0	109	2,436
Net cash provided by (used in) investing activities	(2,090)	(4,206)	8
Cash Flows From Financing Activities
Net borrowings (repayments) of debt with maturities of 90 days or less	43	110	0
Debt with maturities of greater than 90 days – Borrowings	1,496	600	598
Debt with maturities of greater than 90 days – Repayments	(1,455)	(67)	(590)
Proceeds from issuance of preferred stock	557	0	0
Proceeds from issuance of common stock	1,087	0	0
Common stock acquired and retired	0	(142)	(3,715)
Cash dividends paid	(350)	(287)	(303)
Employee stock options exercised, including income tax benefits	12	12	182
Noncontrolling interests, net	(23)	2,296	0
Other, net	(56)	(25)	0
Cash provided by (used in) financing activities - continuing operations	1,311	2,497	(3,828)
Cash provided by (used in) financing activities - discontinued operations	0	0	(7)
Net cash provided by (used in) financing activities	1,311	2,497	(3,835)
Net Increase (Decrease) in Cash and Cash Equivalents	16	272	630
Cash and Cash Equivalents at Beginning of Year	2,716	2,444	1,814
Cash and Cash Equivalents at End of Year	$ 2,732	$ 2,716	$ 2,444