Commitments and Contingencies - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| CRE | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Notional amount | $ 9,915 | $ 9,985 |
| Other consumer | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Notional amount | 2,118 | 2,022 |
| Residential mortgage | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Notional amount | 142 | 146 |
| Commitments to extend, originate, or purchase credit and other commitments | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Notional amount | 215,892 | 210,645 |
| Letters of credit | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Notional amount | $ 8,329 | $ 7,532 |