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STATUTORY INFORMATION (BASED ON NON-GAAP MEASURES) - NARRATIVE (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Statutory Accounting Practices [Line Items] |  |  |
Statutory capital and surplus included investments in upstream affiliates | $ 42.6 | $ 42.6 |
Statutory accounting practices, statutory net income, amount | 176.6 | 105.0 | $ 238.0
Statutory accounting practices, net realized capital gain (loss), net of income taxes | (20.3) | (26.3) | (25.9)
Statutory accounting practices, pre-tax amounts for fees and interest paid | $ 197.5 | $ 190.1 | $ 168.4
Percentage of statutory capital and surplus, available for dividend distribution without prior approval from regulatory agency | 10.00% |  |
Amount of dividends paid by insurance subsidiaries | $ 196.0 |  |
Capital contribution | $ 67.0 |  |
Trended adjusted capital to risk-based capital ratio threshold (less than) | 95.00% |  |
Bermuda Class C Insurer, minimum solvency margin | $ 0.5 |  |
Bermuda Class C Insurer, minimum solvency margin, percentage of assets (percent) | 1.50% |  |
Bermuda Class C Insurer, minimum solvency margin, percentage of enhanced capital requirement (percent) | 25.00% |  |
Target capital level percentage | 120.00% |  |
Statutory economic capital and surplus percentage of enhanced capital requirement (percent) | 150.00% |  |
Company Plan for Improving Capital Position | Maximum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 100.00% |  |
Company Plan for Improving Capital Position | Minimum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 75.00% |  |
Regulatory Authority Special Examination | Maximum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 75.00% |  |
Regulatory Authority Special Examination | Minimum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 50.00% |  |
Regulatory Authority, Any Action Deemed Necessary | Maximum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 50.00% |  |
Regulatory Authority, Any Action Deemed Necessary | Minimum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 35.00% |  |
Regulatory Authority Control | Maximum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 35.00% |  |
Trend Test | Maximum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 150.00% |  |
Trend Test | Minimum |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Adjusted capital to risk-based capital ratio | 100.00% |  |

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