Guarantees - Credit recourse - Additional Information (Details) - Guarantee on loans sold or serviced with credit recourse - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Guarantor Obligations [Line Items] | |||
| Valuation allowances and reserves balance | $ 2.0 | $ 3.0 | |
| Serviced mortgage loans | |||
| Guarantor Obligations [Line Items] | |||
| Loans serviced | 8,000.0 | 8,200.0 | |
| Loans with recourse | Serviced mortgage loans | |||
| Guarantor Obligations [Line Items] | |||
| Repurchased loans | 0.2 | $ 0.3 | |
| Loans with recourse | Residential mortgage loans | |||
| Guarantor Obligations [Line Items] | |||
| Loans serviced | $ 414.0 | $ 429.0 | |