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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Financing Receivable, Impaired [Line Items]        
Loans held-for-sale $ 4,434 $ 4,434   $ 9,158
Proceeds from sales and paydowns of loans originally classified as LHFS   16,100 $ 19,600  
Originations and purchases   11,093 $ 18,732  
Accrued interest receivable 2,500 2,500   2,600
Credit card lines        
Financing Receivable, Impaired [Line Items]        
Interest and fee income reversed 111 417    
Residential mortgage, home equity, direct and indirect consumer and commercial financing receivable | Nonperforming Loans        
Financing Receivable, Impaired [Line Items]        
Interest and fee income reversed 11 29    
Commercial portfolio        
Financing Receivable, Impaired [Line Items]        
Lending commitments 471 471   445
Commitments in payment default $ 391 $ 391   $ 207