Credit Quality And Allowance For Credit Losses (Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Nonaccrual loans		$ 444	$ 582
Reduced-rate loans	[1]	8	8
Total nonperforming loans		452	590
Foreclosed property	[2]	6	17
Total nonperforming assets		458	607
Residential Real Estate
Foreclosed property		5	3
Business loans
Reduced-rate loans		0	0
Retail loans
Nonaccrual loans		50	71
Reduced-rate loans		$ 8	$ 8

[1] There were no reduced-rate business loans at both September 30, 2017 and December 31, 2016. Reduced-rate retail loans were $8 million at both September 30, 2017 and December 31, 2016.

[2] Included $5 million and $3 million of foreclosed residential real estate properties at September 30, 2017 and December 31, 2016, respectively.