CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOW FROM OPERATING ACTIVITIES
Net income	$ 1,559	$ 1,549
Adjustments to reconcile net income to net cash provided by operating activities
Discontinued operations, net	1	(144)
Depreciation, depletion and amortization of assets	1,085	890
Deferred income tax provision	350	276
Other noncash charges to income	65	115
Gains on disposition of assets, net	(1)	(22)
Undistributed earnings from equity investments	(9)	(48)
Dry hole and impairment expense	82	49
Changes in operating assets and liabilities, net	(317)	(629)
Other operating, net	(42)	183
Operating cash flow from continuing operations	2,773	2,219
Operating cash flow from discontinued operations, net of taxes	(8)	3
Net cash provided by operating activities	2,765	2,222
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(2,412)	(1,325)
Payments for purchases of assets and businesses	(97)	(3,015)
Sales of assets, net	2	44
Other, net	92	(15)
Investing cash flow from continuing operations	(2,415)	(4,311)
Investing cash flow from discontinued operations		2,570
Net cash used by investing activities	(2,415)	(1,741)
CASH FLOW FROM FINANCING ACTIVITIES
Proceeds from short-term borrowings		1,000
Payments of long-term debt		(1,523)
Proceeds from issuance of common stock	15	3
Purchases of treasury stock	(15)	(13)
Distributions to noncontrolling interest		(121)
Cash dividends paid	(374)	(310)
Other, net	3	5
Net cash used by financing activities	(371)	(959)
Decrease in cash and cash equivalents	(21)	(478)
Cash and cash equivalents-beginning of period	3,781	2,578
Cash and cash equivalents-end of period	$ 3,760	$ 2,100