Quarterly report pursuant to Section 13 or 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
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 779 $ 1,465 $ 1,757 $ 3,876
Carrying Value $ 668 $ 1,273 $ 1,494 $ 3,344
Pre-Modification Interest Rate 4.87% 4.60% 4.47% 4.69%
Post-Modification Interest Rate 4.10% 4.42% 3.71% 4.20%
Net Charge-offs $ 21 $ 53 $ 52 $ 125
Residential Mortgage        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 487 1,163 1,039 3,052
Carrying Value $ 445 $ 1,030 $ 942 $ 2,707
Pre-Modification Interest Rate 4.83% 4.91% 4.77% 4.99%
Post-Modification Interest Rate 4.51% 4.71% 4.29% 4.47%
Net Charge-offs $ 4 $ 28 $ 9 $ 70
Principal forgiveness 1 48 12 371
Home equity        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 292 302 718 824
Carrying Value $ 223 $ 243 $ 552 $ 637
Pre-Modification Interest Rate 4.95% 3.41% 4.03% 3.55%
Post-Modification Interest Rate 3.41% 3.34% 2.87% 3.20%
Net Charge-offs $ 17 $ 25 $ 43 $ 55