Statement of Consolidated Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 797	$ 1,134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,740	936
Asset retirement obligation accretion	55	37
Provision for deferred income taxes	38	150
Other	18	(14)
Changes in operating assets and liabilities:
Receivables	(82)	(357)
Inventories	67	(26)
Drilling advances	(136)	(18)
Deferred charges and other	(11)	104
Accounts payable	(67)	95
Accrued expenses	(426)	(65)
Deferred credits and noncurrent liabilities	14	3
NET CASH PROVIDED BY OPERATING ACTIVITIES	2,007	1,979
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(1,705)	(1,571)
Additions to gas gathering, transmission and processing facilities	(262)	(125)
Equity investment in Burrup Holdings Limited	(439)
Deposit related to acquisition of Cordillera Energy Partners III LLC	(200)
Other	(36)	(53)
NET CASH USED IN INVESTING ACTIVITIES	(2,642)	(1,749)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility and bank notes, net	657	19
Dividends paid	(77)	(76)
Common stock activity	2	26
Other	3	23
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	585	(8)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(50)	222
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	295	134
CASH AND CASH EQUIVALENTS AT END OF PERIOD	245	356
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	88	73
Income taxes paid, net of refunds	$ 809	$ 448