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Discontinued Operations (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating results of discontinued operations
Income from discontinued operations before income tax	$ 2,164	$ 195	$ 2,721	$ 507
Commercial Business [Member]
Operating results of discontinued operations
Net interest income and other revenues	1	2	22	3
Income from discontinued operations before income tax		$ 1	$ 20	$ 2

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income 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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