Annual report pursuant to Section 13 and 15(d)

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entered into During the Period (Details)

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Outstanding Loans and Leases - Consumer Real Estate - TDRs Entered into During the Period (Details) - Consumer real estate - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 4,005 $ 6,803 $ 12,111
Carrying Value $ 3,430 $ 5,712 $ 10,537
Pre-Modification Interest Rate 4.61% 5.12% 5.30%
Post-Modification Interest Rate 4.11% 4.73% 4.24%
Net Charge-offs $ 181 $ 171 $ 427
Residential Mortgage      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 2,986 5,940 11,233
Carrying Value $ 2,655 $ 5,120 $ 10,016
Pre-Modification Interest Rate 4.98% 5.28% 5.30%
Post-Modification Interest Rate 4.43% 4.93% 4.27%
Net Charge-offs $ 97 $ 72 $ 235
Principal forgiveness 396 53 467
Home equity lines of credit      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 1,019 863 878
Carrying Value $ 775 $ 592 $ 521
Pre-Modification Interest Rate 3.54% 4.00% 5.29%
Post-Modification Interest Rate 3.17% 3.33% 3.92%
Net Charge-offs $ 84 $ 99 $ 192