Other Income, Net Of Losses (Other Income, Net Of Losses) (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
Other Nonoperating Income (Expense) [Abstract]
Fees and Commissions, Mortgage Banking	$ 105	$ 53	$ 342	$ 141
Fees and Commissions, Other	33	30	96	86
Income (Loss) from Equity Method Investments	22	21	69	63
Remarketing Fees	16	24	54	92
Other Securitization Income Loss	10	18	33	169
Unrealized Gain (Loss) on Derivatives	(3)	(55)	(35)	(134)
Change in other income due to fair value option elections	0	(44)	(19)	(83)
Other Nonoperating Income	42	83	188	239
Other Income	$ 225	$ 130	$ 728	$ 573