Consolidated Statements of Income (unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues and other income:
Sales and other operating revenues	$ 3,633	$ 2,839	$ 10,969	$ 8,287
Sales to related parties	16	15	45	41
Income from equity method investments	123	77	360	245
Net gain on disposal of assets	13	0	63	822
Other income	14	24	36	52
Total revenues and other income	3,799	2,955	11,473	9,447
Costs and expenses:
Cost of revenues (excludes items below)	1,600	1,107	4,671	3,384
Purchases from related parties	57	57	184	132
Depreciation, depletion and amortization	517	530	1,716	1,376
Impairments	0	0	307	439
General and administrative expenses	104	108	371	328
Other taxes	59	44	170	145
Exploration expenses	129	59	504	282
Total costs and expenses	2,466	1,905	7,923	6,086
Income from operations	1,333	1,050	3,550	3,361
Net interest and other	(30)	(16)	(62)	(53)
Loss on early extinguishment of debt	0	0	(279)	(92)
Income from continuing operations before income taxes	1,303	1,034	3,209	3,216
Provision for income taxes	898	567	2,051	1,758
Income from continuing operations	405	467	1,158	1,458
Discontinued operations	0	229	1,239	404
Net income	$ 405	$ 696	$ 2,397	$ 1,862
Basic:
Income from continuing operations, per basic share	$ 0.57	$ 0.66	$ 1.63	$ 2.06
Discontinued operations, per basic share	$ 0.00	$ 0.32	$ 1.74	$ 0.57
Net income, per basic share	$ 0.57	$ 0.98	$ 3.37	$ 2.63
Diluted:
Income from continuing operations, per diluted share	$ 0.57	$ 0.66	$ 1.62	$ 2.05
Discontinued operations, per diluted share	$ 0.00	$ 0.32	$ 1.73	$ 0.57
Net income, per diluted share	$ 0.57	$ 0.98	$ 3.35	$ 2.62
Dividends paid, per share	$ 0.15	$ 0.25	$ 0.65	$ 0.74
Weighted average number of shares
Basic	711	710	712	709
Weighted Average Number Of Diluted Shares	714	712	716	711