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Reinsurance - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Reinsurance Disclosures [Abstract] |  |  |  |
Benefits and claims ceded to reinsurers | $ 284.2 | $ 368.5 | $ 1,016.8 | $ 1,083.3

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