Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Nonperforming, Narrative (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Nonperforming, Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Financing Receivable, Past Due [Line Items]    
Nonperforming loans and leases $ 3,918 $ 3,808
Threshold period past due for nonperforming status of financing receivables 90 days 90 days
Commercial    
Financing Receivable, Past Due [Line Items]    
Nonperforming loans and leases $ 1,204 $ 1,054
Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Nonperforming loans and leases 2,714 2,754
Consumer Portfolio Segment | Residential mortgage    
Financing Receivable, Past Due [Line Items]    
Nonperforming loans and leases 2,125 2,167
Federal National Mortgage Association Certificates and Obligations (FNMA) and Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) | Residential mortgage    
Financing Receivable, Past Due [Line Items]    
Long-term credit protection agreements, amount covered $ 9,300 $ 9,500