Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||||||
| Unused commitments to extend credit | $ 65,468 | $ 63,232 | ||||
| Standby letters of credit | 2,142 | 2,096 | ||||
| Commercial letters of credit | 103 | 58 | ||||
| Liabilities associated with standby letters of credit | 33 | 33 | ||||
| Assets associated with standby letters of credit | 34 | 35 | ||||
| Reserve for unfunded credit commitments | $ 131 | $ 117 | $ 116 | $ 111 | $ 114 | $ 124 |