Statement of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,307	$ 1,687
Adjustments to reconcile net income to net cash provided by operating activities
Gains on asset sales	(1,794)	(412)
Depreciation, depletion and amortization	1,973	2,136
Asset impairments		267
Exploratory dry hole costs	87	210
Lease impairment	167	163
Stock compensation expense	51	60
Provision (benefit) for deferred income taxes	405	(85)
Income from discontinued operations	(169)	(98)
Changes in operating assets and liabilities	(1,008)	67
Cash provided by operating activities - continuing operations	3,019	3,995
Cash provided by operating activities - discontinued operations	301	95
Net cash provided by operating activities	3,320	4,090
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(4,388)	(5,928)
Proceeds from asset sales	3,802	656
Other, net	(164)	(26)
Cash used in investing activities - continuing operations	(750)	(5,298)
Cash used in investing activities - discontinued operations	(62)	(84)
Net cash used in investing activities	(812)	(5,382)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) of debt with maturities of 90 days or less	(1,313)	1,583
Debt with maturities of greater than 90 days
Borrowings	535	448
Repayments	(1,290)	(432)
Cash dividends paid	(154)	(136)
Common stock acquired and retired	(500)
Noncontrolling interests, net	(182)
Other, net	84	9
Cash provided by (used in) financing activities - continuing operations	(2,820)	1,472
Cash provided by (used in) financing activities - discontinued operations	(9)	(3)
Net cash provided by (used in) financing activities	(2,829)	1,469
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(321)	177
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	642	351
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 321	$ 528