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Reinsurance - Narrative (Details) - USD ($) $ in Billions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Effects of Reinsurance [Line Items] |  |
Ceded reserves | $ 3.3 |
Reinsurance recoverables | $ 41.9 | $ 40.5
Investment Grade |  |
Effects of Reinsurance [Line Items] |  |
Reinsurance recoverable (as a percent) | 83.00% | 83.00%
Non-Investment Grade |  |
Effects of Reinsurance [Line Items] |  |
Reinsurance recoverable (as a percent) | 15.00% | 15.00%
Non-Investment Grade | Captive Insurers |  |
Effects of Reinsurance [Line Items] |  |
Reinsurance recoverable (as a percent) | 80.00% | 81.00%
Not Rated |  |
Effects of Reinsurance [Line Items] |  |
Reinsurance recoverable (as a percent) | 2.00% | 2.00%

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