Statement of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 1,752	$ 1,153
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization	2,839	3,672
Asset retirement obligation accretion	130	112
Provision for deferred income taxes	425	33
Other	(190)	56
Changes in operating assets and liabilities:
Receivables	142	490
Inventories	(32)	24
Drilling advances	281	(125)
Deferred charges and other	(135)	(53)
Accounts payable	190	(113)
Accrued expenses	(13)	(472)
Deferred credits and noncurrent liabilities	(9)	22
NET CASH PROVIDED BY OPERATING ACTIVITIES	5,380	4,799
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(5,138)	(3,756)
Additions to gas gathering, transmission, and processing facilities	(495)	(442)
Acquisition of Cordillera Energy Partners III, LLC		(2,607)
Proceeds from Kitimat LNG transaction, net	405
Acquisition of Yara Pilbara Holdings Pty Limited		(439)
Acquisitions, other	(148)	(65)
Other, net	12	(277)
NET CASH USED IN INVESTING ACTIVITIES	(5,364)	(7,586)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net	931	431
Fixed rate debt borrowings		2,991
Payments on fixed rate debt	(500)	(400)
Dividends paid	(183)	(161)
Treasury stock activity, net	(249)	2
Other	9	(10)
NET CASH PROVIDED BY -USED IN) FINANCING ACTIVITIES	8	2,853
NET INCREASE IN CASH AND CASH EQUIVALENTS	24	66
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	160	295
CASH AND CASH EQUIVALENTS AT END OF PERIOD	184	361
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	79	64
Income taxes paid, net of refunds	$ 802	$ 1,277