Other Borrowings - Outstanding Long-Term FHLB Advance Issuances (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Debt [Line Items] | ||
| FHLB advances | $ 1,100 | $ 1,000 |
| Long-term FHLB Advance, Issued April 30, 2026 | ||
| Debt [Line Items] | ||
| FHLB advances | $ 700 | |
| Period of basis point spread | 0.38% | |
| Long-term FHLB Advance, Issued May 29, 2026 | ||
| Debt [Line Items] | ||
| FHLB advances | $ 200 | |
| Period of basis point spread | 0.38% | |
| Long-term FHLB Advance, Issued June 30, 2026 | ||
| Debt [Line Items] | ||
| FHLB advances | $ 200 | |
| Period of basis point spread | 0.43% | |
| Long-term FHLB Advance, Issued October 30, 2025 | ||
| Debt [Line Items] | ||
| FHLB advances | $ 500 | |
| Period of basis point spread | 0.38% | |
| Long-term FHLB Advance, Issued November 26, 2025 | ||
| Debt [Line Items] | ||
| FHLB advances | $ 500 | |
| Period of basis point spread | 0.36% |