Commitments and Contingencies - Concentration of Credit Risk (Details) - Reinsurer Concentration Risk - Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Aon plc
Concentration Risk [Line Items]
Concentration risk percentage	19.00%	13.00%	13.00%
Marsh & McLennan Companies Inc
Concentration Risk [Line Items]
Concentration risk percentage	16.00%	20.00%	18.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details