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	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Net derivative gain recognized in income	$ 60	$ 60
Interest Rate Contracts | Other Noninterest Income
Net derivative gain recognized in income	20	22
Energy Contracts | Other Noninterest Income
Net derivative gain recognized in income	2	3
Foreign Exchange Contracts | Foreign Exchange Income
Net derivative gain recognized in income	$ 38	$ 35