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Commitments, Guarantees and Contingent Liabilities - Florida and Louisiana Citizens (Narrative) (Details) | Dec. 31, 2025 | Apr. 01, 2025 | Jan. 01, 2025
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Florida Citizens | Maximum |  |  |
Loss Contingencies |  |  |
Surcharge assessment rate (as a percent) | 15.00% |  |
Emergency assessment rate (as a percent) | 10.00% |  |
Louisiana Citizens |  |  |
Loss Contingencies |  |  |
Surcharge assessment rate (as a percent) |  |  | 10.00%
Emergency assessment rate (as a percent) |  | 1.36% |
Assessment rate, percent of deficit or prior year premiums (as a percent) | 10.00% |  |

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