Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||||||
| Unused commitments to extend credit | $ 70,469 | $ 68,237 | ||||
| Standby letters of credit | 2,619 | 2,283 | ||||
| Commercial letters of credit | 97 | 97 | ||||
| Liabilities associated with standby letters of credit | 41 | 34 | ||||
| Assets associated with standby letters of credit | 42 | 36 | ||||
| Reserve for unfunded credit commitments | $ 124 | $ 120 | $ 130 | $ 131 | $ 117 | $ 116 |