Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOW FROM OPERATING ACTIVITIES
Net income	$ 5,903	$ 4,598	$ 6,771
Adjustments to reconcile net income to net cash provided by operating activities:
Discontinued operations, net	19	37	(131)
Depreciation, depletion and amortization of assets	5,347	4,511	3,591
Deferred income tax provision	1,187	1,128	1,436
Other noncash charges to income	299	195	190
Asset impairments and related items	621	1,751
Gain on sale of equity investments	(1,175)
Undistributed earnings from equity investments	(3)	(30)	(33)
Dry hole expenses	142	279	160
Changes in operating assets and liabilities:
(Increase) decrease in receivables	(755)	472	(360)
Decrease (increase) in inventories	87	(265)	(50)
Decrease in other current assets	60	127	95
Increase (decrease) in accounts payable and accrued liabilities	500	(1,086)	657
Increase (decrease) in current domestic and foreign income taxes	369	1	(174)
Other operating, net	382	(370)	154
Operating cash flow from continuing operations	12,983	11,348	12,306
Operating cash flow from discontinued operations, net of taxes	(56)	(36)	(25)
Net cash provided by operating activities	12,927	11,312	12,281
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(9,037)	(10,226)	(7,518)
Payments for purchases of assets and businesses	(643)	(2,490)	(4,909)
Sales of equity investments and assets, net	1,619	4	50
Other, net	(132)	57	(96)
Investing cash flow from continuing operations	(8,193)	(12,655)	(12,473)
Investing cash flow from discontinued operations			2,570
Net cash used by investing activities	(8,193)	(12,655)	(9,903)
CASH FLOW FROM FINANCING ACTIVITIES
Payments of long-term debt	(690)		(1,523)
Proceeds from long-term debt		1,736	2,111
Proceeds from issuance of common stock	30	85	50
Purchases of treasury stock	(943)	(583)	(274)
Contributions from (distributions to) noncontrolling interest	214	32	(121)
Cash dividends paid	(1,553)	(2,128)	(1,436)
Other, net	9	12	18
Net cash used by financing activities	(2,933)	(846)	(1,175)
Increase (decrease) in cash and cash equivalents	1,801	(2,189)	1,203
Cash and cash equivalents - beginning of year	1,592	3,781	2,578
Cash and cash equivalents - end of year	$ 3,393	$ 1,592	$ 3,781