Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Nonoperating Income (Expense) [Abstract]
Remarketing Fees	$ 103	$ 101	$ 112
Fees and Commissions, Other	98	90	88
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets	64	45	31
Income (Loss) from Equity Method Investments	18	52	18
Other Income	111	71	62
Noninterest Income, Other Operating Income	$ 394	$ 359	$ 311