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Commitments, Contingencies and Guarantees (Tables) | 3 Months Ended
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Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract] |
Credit Risk Of Off- Balance Sheet Financial Instruments By Contractual Amounts | Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table:
| March 31, 2024 |  | December 31, 2023
| (In millions)
Unused commitments to extend credit | $ | 63,676 |  |  | $ | 63,631 |
Standby letters of credit | 2,082 |  |  | 1,997 |
Commercial letters of credit | 78 |  |  | 78 |
Liabilities associated with standby letters of credit | 31 |  |  | 32 |
Assets associated with standby letters of credit | 33 |  |  | 34 |
Reserve for unfunded credit commitments | 114 |  | 124 |

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