Non-Interest Revenue and Expense Detail (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Details Of Certain Statements Of Income Lines Details [Abstract]
Professional services	$ 817	$ 763	$ 1,509	$ 1,479
Occupancy and equipment	467	460	929	932
Card-Related Fraud Losses	102	75	186	156
Communications	101	92	194	188
Gain on business travel joint venture transaction	(626)	0	(626)	0
Other net expenses	387	219	605	465
Total other, net expense	$ 1,248	$ 1,609	$ 2,797	$ 3,220