Commitments and Contingencies (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||
| Loss Contingency, Receivable | $ 0.5 | $ 0.5 | |
| Loan subject to loss-sharing arrangements, aggregate unpaid principal amount | 24,000.0 | 23,000.0 | |
| Loan loss accrual | 30.2 | 30.0 | |
| Loan loss guarantee reserve | 24.1 | 28.5 | |
| Level of risk retained (per claim) | 10.0 | ||
| Loss Contingency Accrual [Roll Forward] | |||
| Loss Contingency, Receivable | 0.5 | $ 0.5 | |
| Loan loss incurred [Abstract] | 20.6 | ||
| Insurance Claims [Member] | |||
| Loss Contingency Accrual [Roll Forward] | |||
| Loss Contingency Accrual | 4.2 | $ 9.4 | |
| Loss Contingency Accrual, Provision | 3.0 | 0.2 | |
| Loss Contingency Accrual, Provision Adjustment | 0.3 | 0.4 | |
| Loss Contingency Accrual, Payments | (2.5) | (7.2) | |
| Loss Contingency Accrual | $ 5.0 | $ 2.8 | |