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Statutory Requirements and Dividends Restrictions - Summary of Statutory Requirements and Dividends Restrictions (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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U.S. |  |
Required statutory capital and surplus | $ 565.7 | $ 488.9
Actual statutory capital and surplus | 1,164.9 | 1,063.1
Bermuda |  |
Required statutory capital and surplus | 579.3 | 601.1
Actual statutory capital and surplus | 1,761.3 | 1,685.2
U.K. |  |
Required statutory capital and surplus | 277.3 | 257.2
Actual statutory capital and surplus | $ 651.0 | $ 734.7

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- Definition Dividend payments restrictions schedule required statutory capital and surplus. + References No definition available. + Details
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- Definition Amount of statutory capital and surplus computed using prescribed or permitted statutory accounting practice. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477908/944-505-50-1 + Details
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