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Commitments, Contingencies and Guarantees (Tables) | 9 Months Ended
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Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract] |
Credit Risk Of Off- Balance Sheet Financial Instruments By Contractual Amounts |
| September 30, 2025 |  | December 31, 2024
| (In millions)
Unused commitments to extend credit | $ | 67,571 |  |  | $ | 63,232 |
Standby letters of credit | 2,281 |  |  | 2,096 |
Commercial letters of credit | 82 |  |  | 58 |
Liabilities associated with standby letters of credit | 38 |  |  | 33 |
Assets associated with standby letters of credit | 39 |  |  | 35 |
Reserve for unfunded credit commitments | 132 |  | 116 |

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