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, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net derivative gain recognized in income	$ 15	$ 16	$ 28	$ 29
Interest Rate Contracts | Other Noninterest Income
Net derivative gain recognized in income	4	6	8	9
Energy Contracts | Other Noninterest Income
Net derivative gain recognized in income	0	1	0	2
Foreign Exchange Contracts | Foreign Exchange Income
Net derivative gain recognized in income	$ 11	$ 9	$ 20	$ 18