Noninterest Revenue and Noninterest Expense - Noninterest Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Noninterest Income (Expense) [Abstract] | |||||
| Legal expense | $ 116 | $ 118 | $ 339 | $ 239 | |
| FDIC-related expense | 350 | 302 | 682 | ||
| FDIC-related expense | 291 | ||||
| Operating losses | $ 280 | $ 314 | $ 566 | $ 700 | |
| FDIC special assessment release | $ 323 | ||||