Credit Quality And Allowance For Credit Losses (Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property) (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Nonaccrual loans		$ 357	$ 273
Reduced-rate loans	[1]	12	17
Total nonperforming loans		369	290
Foreclosed property	[2]	12	10
Total nonperforming assets		381	300
Business loans
Reduced-rate loans		0	0
Retail loans
Nonaccrual loans		60	67
Reduced-rate loans		$ 12	$ 17

[1] Reduced-rate business loans were zero at both September 30, 2015 and December 31, 2014, and reduced-rate retail loans were $12 million and $17 million at September 30, 2015 and December 31, 2014, respectively.

[2] Foreclosed residential real estate properties.