Statement of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 717	$ 797
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,435	1,740
Asset retirement obligation accretion	65	55
Provision for deferred income taxes	106	38
Other	35	18
Changes in operating assets and liabilities:
Receivables	(12)	(82)
Inventories	51	67
Drilling advances	222	(136)
Deferred charges and other	(6)	(11)
Accounts payable	57	(67)
Accrued expenses	(33)	(426)
Deferred credits and noncurrent liabilities	(16)	14
NET CASH PROVIDED BY OPERATING ACTIVITIES	2,621	2,007
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(2,546)	(1,705)
Additions to gas gathering, transmission and processing facilities	(256)	(262)
Proceeds from Kitimat LNG transaction, net	405
Acquisition of Yara Pilbara Holdings Pty Limited		(439)
Acquisitions, other	(148)	(200)
Other, net	(47)	(36)
NET CASH USED IN INVESTING ACTIVITIES	(2,592)	(2,642)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net	133	657
Dividends paid	(86)	(77)
Other	12	5
NET CASH PROVIDED BY FINANCING ACTIVITIES	59	585
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	88	(50)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	160	295
CASH AND CASH EQUIVALENTS AT END OF PERIOD	248	245
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	62	88
Income taxes paid, net of refunds	$ 487	$ 809