Deposits - Narrative (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Banking and Thrift, Other Disclosure [Abstract] | |||||
| Deposits | $ 19,894,501,000 | $ 19,894,501,000 | $ 21,060,151,000 | ||
| Brokered deposits | 8,200,000,000 | 8,200,000,000 | 8,800,000,000 | ||
| Retail and other deposits | 11,600,000,000 | 11,600,000,000 | 12,300,000,000 | ||
| Stable interest-bearing deposits, total | 6,800,000,000 | 6,800,000,000 | 7,600,000,000 | ||
| Brokered deposit placement fee | 2,000,000 | $ 2,000,000 | 4,000,000 | $ 4,000,000 | |
| Third party broker fees paid | 0 | $ 0 | 5,000,000 | $ 0 | |
| Deposits exceeding FDIC insurance limits | 1,300,000,000 | 1,300,000,000 | 1,200,000,000 | ||
| Accrued interest on deposits | $ 70,000,000 | $ 70,000,000 | $ 71,000,000 | ||