Discontinued Operations (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Discontinued Operations (Textuals) [Abstract]
Income (loss) from discontinued operations, net of income tax	$ 0	$ 8	$ 17	$ (1)
Real Estate [Member]
Discontinued Operations (Textuals) [Abstract]
Real Estate Held-for-sale	12		12		123
Income (loss) from discontinued operations, net of income tax	$ 0	$ 19	$ 17	$ 70

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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+ Details