Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Commercial Loans - Impaired Loans (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Commercial Loans - Impaired Loans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Financing Receivable, Impaired [Line Items]          
Financing receivable, trouble debt restructuring $ 1,900   $ 1,900   $ 1,700
Loans held-for-sale 8,277   8,277   9,243
Proceeds from sales and paydowns of loans originally classified as LHFS     18,200 $ 11,100  
Originations and purchases     17,031 9,151  
Accrued interest receivable 2,300   2,300   2,400
Credit card lines          
Financing Receivable, Impaired [Line Items]          
Interest and fee income reversed 124   282    
Residential mortgage, home equity, direct and indirect consumer and commercial financing receivable | Nonperforming Loans          
Financing Receivable, Impaired [Line Items]          
Interest and fee income reversed 9   17    
Commercial          
Financing Receivable, Impaired [Line Items]          
Carrying Value 320 $ 789 865 $ 1,300  
Lending commitments 343   343   402
Commitments in payment default $ 149   $ 149   $ 218