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Credit Quality And Allowance For Credit Losses (Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Nonaccrual loans $ 437 $ 519
Reduced-rate loans 22 [1] 22 [1]
Total nonperforming loans 459 541
Foreclosed property 19 54
Total nonperforming assets 478 595
Retail loans
   
Nonaccrual loans 99 105
Reduced-rate loans 17 16
Business loans
   
Nonaccrual loans 338 414
Reduced-rate loans $ 5 $ 6
[1] Reduced-rate business loans totaled $5 million and $6 million at September 30, 2013 and December 31, 2012, and reduced-rate retail loans totaled $17 million and $16 million at September 30, 2013 and December 31, 2012.