Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Remarketing Fees	$ 26	$ 25	$ 79	$ 78
Fees and Commissions, Other	25	23	72	66
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets	18	12	49	32
Income (Loss) from Equity Method Investments	3	11	14	48
Other Income	26	21	75	59
Noninterest Income, Other Operating Income	$ 98	$ 92	$ 289	$ 283