Investments - Net Investment Income (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Net Investment Income [Line Items] | ||
| Total | $ 9.9 | $ 9.6 |
| Investment expense | 0.1 | 0.1 |
| Net investment income | 9.8 | 9.5 |
| Interest on cash and cash equivalents | ||
| Net Investment Income [Line Items] | ||
| Total | 2.1 | 2.2 |
| Fixed maturities | ||
| Net Investment Income [Line Items] | ||
| Total | 7.7 | 7.1 |
| Short-term investments | ||
| Net Investment Income [Line Items] | ||
| Total | $ 0.1 | $ 0.3 |
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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expenses related to the generation of investment income. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition 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/2003/role/disclosureRef
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