Discontinued Operations And Held For Sale Businesses (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Gain (loss) on disposal and impairment, after taxes	$ 0	$ 79	$ 0	$ 57
Tax effect of gain on disposal of discontinued operations	0	38	0	38
Discontinued Operations Income Loss
Revenue	107	218	327	948
(Loss) income from operations of discontinued businesses	(6)	37	(10)	115
Income tax benefit (expense)	31	(8)	33	(23)
Income from operations of discontinued businesses	25	29	23	92
Subsidiary Lal Pir And Pak Gen [Member]
Loss on disposal and impairment recognized net of tax and noncontrolling interests				14
Subsidiary Barka [Member]
Gain (loss) on disposal and impairment, after taxes				63
Tax effect of gain on disposal of discontinued operations				$ 38

Gain (loss) after tax expense (benefit) and noncontrolling interests, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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