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, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 513 $ 121 $ 730 $ 223
Modifications under government programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 1 0 3 3
Modifications under proprietary programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 479 20 665 59
Loans discharged in Chapter 7 bankruptcy        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications 12 21 22 32
Trial modifications        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total modifications $ 21 $ 80 $ 40 $ 129