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Statutory Requirements and Dividends Restrictions - Summary of Statutory Requirements and Dividends Restrictions (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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U.S. |  |
Required statutory capital and surplus | $ 488.9 | $ 513.9
Actual statutory capital and surplus | 1,063.1 | 838.6
Bermuda |  |
Required statutory capital and surplus | 601.1 | 536.7
Actual statutory capital and surplus | 1,685.2 | 1,426.6
U.K. |  |
Required statutory capital and surplus | 257.2 | 771.8
Actual statutory capital and surplus | $ 734.7 | $ 802.5

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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//1943274/2147479989/944-505-50-1 + Details
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