Consolidated Statements of Income (unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues and other income:
Sales and other operating revenues	$ 3,680	$ 2,793	$ 7,336	$ 5,448
Sales to related parties	14	14	29	26
Income from equity method investments	120	83	237	168
Net gain on disposal of assets	45	10	50	822
Other income	6	3	22	28
Total revenues and other income	3,865	2,903	7,674	6,492
Costs and expenses:
Cost of revenues (excludes items below)	1,667	1,230	3,071	2,277
Purchases from related parties	71	35	127	75
Depreciation, depletion and amortization	564	416	1,199	846
General and administrative expenses	130	118	267	220
Other taxes	53	52	111	101
Exploration expenses	145	125	375	223
Total costs and expenses	2,937	1,981	5,457	4,181
Impairments	307	5	307	439
Income from operations	928	922	2,217	2,311
Net interest and other	(13)	(15)	(32)	(37)
Loss on early extinguishment of debt	0	(92)	(279)	(92)
Income from continuing operations before income taxes	915	815	1,906	2,182
Provision for income taxes	(617)	(441)	(1,153)	(1,191)
Income From Continuing Operations	298	374	753	991
Discontinued operations	698	335	1,239	175
Net income	$ 996	$ 709	$ 1,992	$ 1,166
Basic:
Income from continuing operations, per basic share	$ 0.42	$ 0.53	$ 1.06	$ 1.39
Discontinued operations, per basic share	$ 0.98	$ 0.47	$ 1.74	$ 0.25
Net income, per basic share	$ 1.40	$ 1.00	$ 2.80	$ 1.64
Diluted:
Income from continuing operations, per diluted share	$ 0.42	$ 0.53	$ 1.05	$ 1.39
Discontinued operations, per diluted share	$ 0.97	$ 0.47	$ 1.73	$ 0.25
Net income, per diluted share	$ 1.39	$ 1.00	$ 2.78	$ 1.64
Dividends paid, per share	$ 0.25	$ 0.25	$ 0.50	$ 0.49
Weighted average number of shares
Basic	713	710	712	709
Diluted	717	712	716	711