Non-Interest Revenue and Expense Detail (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Details Of Certain Statements Of Income Lines Details [Abstract]
Global Network Services partner revenues	$ 197	$ 155	$ 342	$ 318
Gross realized gains on investment securities	0	0	4	0
Other	348	366	685	671
Total other revenues	$ 545	$ 521	$ 1,031	$ 989