Assets and Liabilities of Businesses Held For Sale and Discontinued Operations (Discontinued Operations Narrative) (Details) (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
Operations
Benefit (provision) for income taxes	$ (78)	$ (59)	$ (367)	$ (834)
Earnings (loss) from discontinued operations, net of taxes	(111)	(64)	(881)	166
Disposal
Earnings (loss) from discontinued operations, net of taxes	(111)	(64)	(881)	166
Assets
Loans and leases receivable, Gross	277,003		277,003		295,037
All other assets	64,887		64,887		75,612
Assets of discontinued operations	1,199		1,199		1,669
Liabilities
Deferred income taxes	5,945		5,945		7,052
Liabilities of discontinued operations	1,777		1,777		1,471
Discontinued Operation Or Asset Disposal Component [Member]
Operations
Total revenues	(112)	17	(462)	348
Earnings (loss) from discontinued operations before income taxes	(141)	(74)	(579)	(112)
Benefit (provision) for income taxes	28	22	155	55
Earnings (loss) from discontinued operations, net of taxes	(113)	(52)	(424)	(57)
Disposal
Gain (loss) on disposal before income taxes	(4)	(45)	(506)	(86)
Benefit for income taxes	6	33	49	309
Gain (loss) on disposal, net of taxes	2	(12)	(457)	223
Earnings (loss) from discontinued operations, net of taxes	(111)	(64)	(881)	166
Assets
Cash and cash equivalents	111		111		121
Loans and leases receivable, Gross	6		6		521
Other assets	1,082		1,082		1,027
Assets of discontinued operations	1,199		1,199		1,669
Liabilities
Deferred income taxes	360		360		207
Other liabilities	1,417		1,417		1,264
Liabilities of discontinued operations	$ 1,777		$ 1,777		$ 1,471