Derivative And Credit-Related Financial Instruments (Schedule Of Net Gains Recognized In Income On Customer-Initiated Derivatives) (Details) - Not Designated as Hedging Instrument - Customer-Initiated And Other Activities - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net derivative gain recognized in income	$ 13	$ 15	$ 26	$ 28
Interest Rate Contracts | Other Noninterest Income
Net derivative gain recognized in income	5	4	7	8
Energy Contracts | Other Noninterest Income
Net derivative gain recognized in income	0	0	1	0
Foreign Exchange Contracts | Foreign Exchange Income
Net derivative gain recognized in income	$ 8	$ 11	$ 18	$ 20