Statement of Consolidated Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,393	$ 1,565
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,965	1,368
Asset retirement obligation accretion	75	49
Provision for deferred income taxes	446	354
Other	3	67
Changes in operating assets and liabilities:
Receivables	(355)	(104)
Inventories	(97)	(7)
Drilling advances	4	22
Deferred charges and other	(14)	1
Accounts payable	206	49
Accrued expenses	78	(292)
Deferred credits and noncurrent liabilities	20	13
NET CASH PROVIDED BY OPERATING ACTIVITIES	4,724	3,085
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(3,170)	(1,921)
Additions to gas gathering, transmission and processing facilities	(269)	(257)
Acquisition of Devon properties		(1,017)
Acquisitions, other	(78)	(16)
Proceeds from sale of oil and gas properties	192
Other, net	(52)	(7)
NET CASH USED IN INVESTING ACTIVITIES	(3,377)	(3,218)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility and bank notes, net	(289)	(55)
Dividends paid	(153)	(101)
Common stock activity	38	21
Treasury stock activity, net	4	3
Other	26	22
NET CASH USED IN FINANCING ACTIVITIES	(374)	(110)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	973	(243)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	134	2,048
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,107	1,805
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	72	113
Income taxes paid, net of refunds	$ 894	$ 595