Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Credit Card and Other Consumer - TDRs Modified by Program Type (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Credit Card and Other Consumer - TDRs Modified by Program Type (Details) - Credit card and other consumer - 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]        
Carrying Value $ 106 $ 118 $ 251 $ 300
Internal Programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Carrying Value 80 76 178 196
External Programs        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Carrying Value 19 31 59 86
Other        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Carrying Value $ 7 $ 11 $ 14 $ 18