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Loans - Trouble Debt Restructurings (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 2,252 |  |
Commitments to lend on loans modified in TDRs |  | $ 334 | $ 109
Credit Card: |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 433 |  |
Credit Card: | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 19.73% |  |
Consumer Banking: |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 1,077 |  |
Consumer Banking: | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 57.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 8.53% |  |
Consumer Banking: | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 97.00% |  |
Financing Receivable, Modifications, Average Term Extension | 4 months |  |
Consumer Banking: | Auto |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 1,070 |  |
Consumer Banking: | Auto | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 57.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 8.53% |  |
Commitments to lend on loans modified in TDRs | $ 219 |  |
Consumer Banking: | Auto | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 97.00% |  |
Financing Receivable, Modifications, Average Term Extension | 4 months |  |
Consumer Banking: | Retail banking |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 7 |  |
Consumer Banking: | Retail banking | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 92.00% |  |
Financing Receivable, Modifications, Average Term Extension | 13 months |  |
Commercial Banking: |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 742 |  |
Commercial Banking: | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 4.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 0.28% |  |
Commercial Banking: | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 74.00% |  |
Financing Receivable, Modifications, Average Term Extension | 13 months |  |
Commercial Banking: | Commercial and multifamily real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 385 |  |
Commercial Banking: | Commercial and multifamily real estate | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 8.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 0.28% |  |
Commercial Banking: | Commercial and multifamily real estate | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 84.00% |  |
Financing Receivable, Modifications, Average Term Extension | 13 months |  |
Commercial Banking: | Commercial and industrial |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 357 |  |
Commercial Banking: | Commercial and industrial | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 64.00% |  |
Financing Receivable, Modifications, Average Term Extension | 13 months |  |
Domestic credit card: | Credit Card: |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 306 |  |
Domestic credit card: | Credit Card: | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 16.54% |  |
International card businesses: | Credit Card: |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Principal balance reduction | $ 127 |  |
International card businesses: | Credit Card: | Interest rate reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% |  |
Financing Receivable, Modifications, Average Rate Reduction | 27.42% |  |

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