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Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | $ 3,554 | $ 2,240
Nonperforming Loans | 1,528 | 1,344
Nonperforming Loans Without an Allowance | $ 547 | $ 548
Percentage, 90 Days Past Due and Accruing | 1.11% | 0.72%
Percentage, Nonperforming Loans | 0.48% | 0.43%
Percentage, Nonperforming Loans Without an Allowance | 0.17% | 0.18%
Interest income for loans classified as nonperforming | $ 91 | $ 66
Credit Card: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 3,499 | 2,240
Nonperforming Loans | 9 | 9
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card: | Domestic credit card: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 3,367 | 2,135
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card: | International card businesses: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 132 | 105
Nonperforming Loans | 9 | 9
Nonperforming Loans Without an Allowance | 0 | 0
Consumer Banking: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 758 | 634
Nonperforming Loans Without an Allowance | 19 | 8
Consumer Banking: | Auto |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 712 | 595
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 | 46 | 39
Nonperforming Loans Without an Allowance | 19 | 8
Commercial Banking: |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 55 | 0
Nonperforming Loans | 761 | 701
Nonperforming Loans Without an Allowance | 528 | 540
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 0 | 0
Nonperforming Loans | 425 | 271
Nonperforming Loans Without an Allowance | 335 | 246
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
> 90 Days and Accruing | 55 | 0
Nonperforming Loans | 336 | 430
Nonperforming Loans Without an Allowance | $ 193 | $ 294

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