Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2019
USD ($)
payment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of missing payments causing default | payment 3    
Troubled debt restructurings entering payment default that were modified during the preceding twelve months $ 201 $ 368 $ 726
Modifications under government programs      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 26 39 81
Modifications under proprietary programs      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 88 158 138
Loans discharged in Chapter 7 bankruptcy      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Troubled debt restructurings entering payment default that were modified during the preceding twelve months 30 64 116
Trial modifications      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Troubled debt restructurings entering payment default that were modified during the preceding twelve months $ 57 $ 107 $ 391