Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|---|---|
| Other Commitments [Line Items] | ||||
| Unused commitments to extend credit | $ 65,460 | $ 60,935 | ||
| Standby letters of credit | 1,962 | 1,779 | ||
| Commercial letters of credit | 75 | 97 | ||
| Liabilities associated with standby letters of credit | 35 | 28 | ||
| Assets associated with standby letters of credit | 37 | 29 | ||
| Reserve for unfunded credit commitments | $ 118 | $ 95 | $ 126 | $ 45 |