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)

v3.10.0.1
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, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
payment
Sep. 30, 2017
USD ($)
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 $ 81 $ 118 $ 298 $ 566
Modifications under government programs        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 8 16 32 62
Modifications under proprietary programs        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 43 32 130 99
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 12 16 51 93
Trial modifications        
Financing Receivable, Modifications [Line Items]        
Troubled debt restructurings entering payment default that were modified during the preceding twelve months $ 18 $ 54 $ 85 $ 312