Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Reconciliation from Segment Totals to Consolidated [Abstract]
Segment income	$ 590	$ 477	$ 1,593	$ 1,950
Items not allocated to segments, net of income taxes:
Corporate and other unallocated items	(158)	(56)	(267)	(209)
Unrealized Gain On Derivatives Net Of Tax	29	0	29	0
Gain (loss) on dispositions, not allocated to segments	(11)	(1)	72	23
Impairments, not allocated to segments	0	0	(167)	(195)
Loss on early extinguishment of debt, after-tax	0	0	0	(176)
Tax effect of subsidiary restructure	0	0	0	(122)
Deferred income tax items	0	(15)	0	(65)
Water abatement costs	0	0	0	(48)
Income from continuing operations	450	405	1,260	1,158
Discontinued operations	0	0	0	1,239
Net income	450	405	1,260	2,397
Reconciliation of total revenues to sales and other operating revenues (including consumer excise taxes) as reported in the consolidated statements of income:
Segment Reporting Information, Revenue for Reportable Segment	4,034	3,649	11,556	11,014
Less: Sales to related parties	16	16	43	45
Sales and other operating revenues	$ 4,018	$ 3,633	$ 11,513	$ 10,969