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Discontinued Operations (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Discontinued Operations (Textual) [Abstract]
Gain (loss) on disposition, net of tax	$ (7)	$ (19)	$ (8)	$ (20)
Impairment Charge	5		5
Loss recognized in discontinued operations from sale of interest in a consolidated joint venture, net of tax		18		18
Loss in discontinued operations for accrued interest related to uncertain tax position	$ 1	$ 1	$ 2	$ 2

Gain (loss) after tax expense or benefit, 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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