Credit Quality And Allowance For Credit Losses (Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Nonaccrual loans		$ 402	$ 582
Reduced-rate loans	[1]	8	8
Total nonperforming loans		410	590
Foreclosed property	[2]	5	17
Total nonperforming assets		415	607
Residential Real Estate
Foreclosed property		4	3
Business loans
Reduced-rate loans		0	0
Retail loans
Nonaccrual loans		52	71
Reduced-rate loans		$ 8	$ 8

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

[2] Included foreclosed residential real estate properties of $4 million and $3 million at December 31, 2017 and 2016, respectively.