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Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | $ 3,807 | $ 3,554
Nonperforming Loans | 1,995 | 1,528
Nonperforming Loans Without an Allowance | $ 846 | $ 547
Percentage, 90 Days Past Due and Accruing | 1.16% | 1.11%
Percentage, Nonperforming Loans | 0.61% | 0.48%
Percentage, Nonperforming Loans Without an Allowance | 0.26% | 0.17%
Interest income for loans classified as nonperforming | $ 111 | $ 91
Credit Card: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 3,711 | 3,499
Nonperforming Loans | 10 | 9
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card: | Domestic credit card: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 3,577 | 3,367
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card: | International card businesses: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 134 | 132
Nonperforming Loans | 10 | 9
Nonperforming Loans Without an Allowance | 0 | 0
Consumer Banking: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 775 | 758
Nonperforming Loans Without an Allowance | 12 | 19
Consumer Banking: | Auto |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 750 | 712
Nonperforming Loans Without an Allowance | 0 | 0
Consumer Banking: | Retail banking |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 25 | 46
Nonperforming Loans Without an Allowance | 12 | 19
Commercial Banking: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 96 | 55
Nonperforming Loans | 1,210 | 761
Nonperforming Loans Without an Allowance | 834 | 528
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 509 | 425
Nonperforming Loans Without an Allowance | 227 | 335
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 96 | 55
Nonperforming Loans | 701 | 336
Nonperforming Loans Without an Allowance | $ 607 | $ 193

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