Non-Interest Revenue and Expense Detail (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Details Of Certain Statements Of Income Lines Details [Abstract]
Global Network Services partner revenues	$ 156	$ 156	$ 498	$ 474
Gross realized gains on investment securities	1	1	5	1
Other	326	347	1,011	1,018
Total other revenues	$ 483	$ 504	$ 1,514	$ 1,493