Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Consumer Real Estate - Modification Programs (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Consumer Real Estate - Modification Programs (Details) - Consumer real estate - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 98 $ 152 $ 289 $ 395
Modifications under government programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 0 8 8 32
Modifications under proprietary programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 50 18 136 125
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 15 16 44 54
Trial modifications        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 33 $ 110 $ 101 $ 184