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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net derivative gain recognized in income	$ 13	$ 16	$ 41	$ 45
Interest Rate Contracts | Other Noninterest Income
Net derivative gain recognized in income	3	8	11	17
Energy Contracts | Other Noninterest Income
Net derivative gain recognized in income	1	0	1	2
Foreign Exchange Contracts | Foreign Exchange Income
Net derivative gain recognized in income	$ 9	$ 8	$ 29	$ 26