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 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
payment
Sep. 30, 2018
USD ($)
Financing Receivable, Modifications [Line Items]        
Number of missing payments causing default | payment     3  
Troubled debt restructurings entering payment default that were modified during the preceding twelve months $ 47 $ 81 $ 154 $ 298
Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 7 8 20 32
Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 19 43 68 130
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 8 12 26 51
Trial modifications        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months $ 13 $ 18 $ 40 $ 85