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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 121 $ 196 $ 223 $ 337
Modifications under government programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 0 10 3 18
Modifications under proprietary programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 20 22 59 75
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 21 30 32 52
Trial modifications        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 80 $ 134 $ 129 $ 192