Statement of Consolidated Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities
Net Income (Loss)	$ (3,007)	$ 2,374	$ 5,222
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
(Gains) losses on asset sales, net	(51)	(823)	(2,174)
Depreciation, depletion and amortization	3,955	3,224	2,687
Impairment	1,616	0	289
Loss from equity affiliates	25	84	0
Exploratory dry hole costs	410	301	344
Exploration lease impairment	182	207	245
Stock compensation expense	97	87	60
Provision (benefit) for deferred income taxes	(1,319)	270	(427)
(Income) loss from discontinued operations, net of income taxes	48	(682)	(1,186)
Changes in operating assets and liabilities
(Increase) decrease in accounts receivable	841	(199)	(239)
(Increase) decrease in inventories	29	62	134
Increase (decrease) in accounts payable and accrued liabilities	(424)	79	(375)
Increase (decrease) in taxes payable	(222)	(108)	(435)
Changes in operating assets and liabilities	(164)	(372)	(209)
Cash provided by (used in) operating activities - continuing operations	2,016	4,504	3,936
Cash provided by (used in) operating activities - discontinued operations	(35)	(47)	1,162
Net cash provided by (used in) operating activities	1,981	4,457	5,098
Cash Flows From Investing Activities
Additions to property, plant and equipment - E&P	(3,956)	(4,867)	(5,413)
Additions to property, plant and equipment - Bakken Midstream	(365)	(347)	(524)
Proceeds from asset sales	50	2,978	4,458
Other, net	(44)	(192)	(285)
Cash provided by (used in) investing activities - continuing operations	(4,315)	(2,428)	(1,764)
Cash provided by (used in) investing activities - discontinued operations	109	2,436	2,114
Net cash provided by (used in) investing activities	(4,206)	8	350
Cash Flows From Financing Activities
Net borrowings (repayments) of debt with maturities of 90 days or less	0	0	(1,748)
Debt with maturities of greater than 90 days – Borrowings	710	598	535
Debt with maturities of greater than 90 days – Repayments	(67)	(590)	(1,271)
Common stock acquired and retired	(142)	(3,715)	(1,493)
Cash dividends paid	(287)	(303)	(235)
Employee stock options exercised, including income tax benefits	12	182	128
Noncontrolling interests, net	2,296	0	(182)
Other, net	(25)	0	0
Cash provided by (used in) financing activities - continuing operations	2,497	(3,828)	(4,266)
Cash provided by (used in) financing activities - discontinued operations	0	(7)	(10)
Net cash provided by (used in) financing activities	2,497	(3,835)	(4,276)
Net Increase (Decrease) In Cash and Cash Equivalents	272	630	1,172
Cash and Cash Equivalents at Beginning of Year	2,444	1,814	642
Cash and Cash Equivalents at End of Year	$ 2,716	$ 2,444	$ 1,814