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Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Interest income for loans classified as nonperforming | $ 3 | $ 6 | $ 20 | $ 31 |
> 90 Days and Accruing | 4,668 |  | 4,668 |  | $ 3,807
Nonperforming Loans | 1,777 |  | 1,777 |  | 1,995
Nonperforming Loans Without an Allowance | $ 615 |  | $ 615 |  | $ 846
Percentage, 90 Days Past Due and Accruing | 1.06% |  | 1.06% |  | 1.16%
Percentage, Nonperforming Loans | 0.40% |  | 0.40% |  | 0.61%
Percentage, Nonperforming Loans Without an Allowance | 0.14% |  | 0.14% |  | 0.26%
Credit Card: |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | $ 4,582 |  | $ 4,582 |  | $ 3,711
Nonperforming Loans | 23 |  | 23 |  | 10
Nonperforming Loans Without an Allowance | 0 |  | 0 |  | 0
Credit Card: | Personal loans |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 45 |  | 45 |  |
Nonperforming Loans | 11 |  | 11 |  |
Nonperforming Loans Without an Allowance | 0 |  | 0 |  |
Credit Card: | Domestic credit card: |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 4,393 |  | 4,393 |  | 3,577
Nonperforming Loans Without an Allowance | 0 |  | 0 |  | 0
Credit Card: | International card businesses: |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 144 |  | 144 |  | 134
Nonperforming Loans | 12 |  | 12 |  | 10
Nonperforming Loans Without an Allowance | 0 |  | 0 |  | 0
Consumer Banking: |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 0 |  | 0 |  | 0
Nonperforming Loans | 603 |  | 603 |  | 775
Nonperforming Loans Without an Allowance | 9 |  | 9 |  | 12
Consumer Banking: | Auto |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 0 |  | 0 |  | 0
Nonperforming Loans | 585 |  | 585 |  | 750
Nonperforming Loans Without an Allowance | 0 |  | 0 |  | 0
Consumer Banking: | Retail banking |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 0 |  | 0 |  | 0
Nonperforming Loans | 18 |  | 18 |  | 25
Nonperforming Loans Without an Allowance | 9 |  | 9 |  | 12
Commercial Banking: |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 86 |  | 86 |  | 96
Nonperforming Loans | 1,151 |  | 1,151 |  | 1,210
Nonperforming Loans Without an Allowance | 606 |  | 606 |  | 834
Commercial Banking: | Commercial and multifamily real estate |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 0 |  | 0 |  | 0
Nonperforming Loans | 348 |  | 348 |  | 509
Nonperforming Loans Without an Allowance | 176 |  | 176 |  | 227
Commercial Banking: | Commercial and industrial |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
> 90 Days and Accruing | 86 |  | 86 |  | 96
Nonperforming Loans | 803 |  | 803 |  | 701
Nonperforming Loans Without an Allowance | $ 430 |  | $ 430 |  | $ 607

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