Non-Interest Revenue and Expense Detail (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Details Of Certain Statements Of Income Lines Details [Abstract]
Professional services	$ 2,583	$ 2,750	$ 3,008
Occupancy and equipment	1,838	1,854	1,807
Goodwill and intangible asset impairment	0	384	0
Communications	302	345	383
Card-related fraud losses	223	308	369
Gain on business travel joint venture transaction	0	0	(630)
Gain on sale of HFS Portfolios	(1,218)	0	0
Other	1,434	1,152	1,152
Total Other, net	$ 5,162	$ 6,793	$ 6,089