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Investments - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items] |  |
Equity securities | $ 32.3 | $ 37.9
Unrealized gains on equity securities | 1.2 | 2.9
Proceeds from maturity of AFS securities | 825.2 | 511.1
Purchase of available-for-sale securities | 413.9 | 651.3
Debt securities net unrealized (loss) gain | 0.5 | 0.8
Variable Interest Entity, Primary Beneficiary |  |
Investments in and Advances to Affiliates [Line Items] |  |
Equity securities | $ 10.9 | $ 15.8

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