Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entering Payment Default That Were Modified During the Preceding 12 Months (Details)

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Outstanding Loans and Leases - Consumer Real Estate - TDRs Entering Payment Default That Were Modified During the Preceding 12 Months (Details) - Consumer real estate
$ in Millions
 3 Months Ended
Mar. 31, 2017
USD ($)
payment
Mar. 31, 2016
USD ($)
Residential Mortgage    
Financing Receivable, Modifications [Line Items]    
Number of missing payments causing default | payment 3  
Threshold period considered past due after modification 90 days  
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 294 $ 413
Residential Mortgage | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 25 93
Residential Mortgage | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 16 43
Residential Mortgage | Loans discharged in Chapter 7 bankruptcy    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 58 40
Residential Mortgage | Trial modifications    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 195 237
Home equity lines of credit    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 40 64
Home equity lines of credit | Modifications under government programs    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 1  
Home equity lines of credit | Modifications under proprietary programs    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 18 22
Home equity lines of credit | Loans discharged in Chapter 7 bankruptcy    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months 4 5
Home equity lines of credit | Trial modifications    
Financing Receivable, Modifications [Line Items]    
Trouble debt restructurings entered payment default that were modified during the preceding twelve months $ 17 $ 37