Annual report [Section 13 and 15(d), not S-K Item 405]

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

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Outstanding Loans and Leases and Allowance for Credit Losses - Nonperforming, Credit Quality (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases $ 5,975 $ 5,485
Accruing past due 90 days or more $ 1,931 $ 1,756
Nonperforming loans and leases, percent outstanding 0.55% 0.52%
Accruing past due 90 days or more, percent outstanding 0.18% 0.17%
Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases $ 2,647 $ 2,712
Accruing past due 90 days or more 1,631 1,478
Consumer Portfolio Segment | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 2,052 2,114
Accruing past due 90 days or more 229 252
Consumer Portfolio Segment | Residential Mortgage With No Related Allowance    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 1,883 1,974
Accruing past due 90 days or more 0 0
Consumer Portfolio Segment | Home equity lines of credit    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 409 450
Accruing past due 90 days or more 0 0
Consumer Portfolio Segment | Home Equity Line of Credit No Related Allowance    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 334 375
Accruing past due 90 days or more 0 0
Consumer Portfolio Segment | Credit card    
Financing Receivable, Past Due [Line Items]    
Accruing past due 90 days or more 1,401 1,224
Consumer Portfolio Segment | Direct/indirect consumer    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 186 148
Accruing past due 90 days or more 1 2
Commercial    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 3,328 2,773
Accruing past due 90 days or more 300 278
Commercial | United States    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 1,204 636
Accruing past due 90 days or more 90 51
Commercial | Non United States    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 8 175
Accruing past due 90 days or more 4 4
Commercial | Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 2,068 1,927
Accruing past due 90 days or more 6 32
Commercial | Commercial lease financing    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 20 19
Accruing past due 90 days or more 3 7
Commercial | U.S. small business commercial | United States    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 28 16
Accruing past due 90 days or more 197 184
Nonperforming Loans | Residential Mortgage    
Financing Receivable, Past Due [Line Items]    
Nonperforming Loans and Leases 119 156
Accruing past due 90 days or more $ 110 $ 96