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DIVIDEND RESTRICTIONS AND STATUTORY FINANCIAL INFORMATION - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Dividend Restrictions And Statutory Financial Information [Line Items] |  |  |
Minimum solvency margin | $ 0.3 |  |
Prior approval of the Bermuda Monetary Authority is required for dividend payments, if percentage exceeds in prior-year end total statutory capital | 0.25 |  |
Dividend payment restrictions, period in months | 12 months |  |
Dividend payment restrictions, percentage of statutory surplus required | 10.00% |  |
Bermuda Re |  |  |
Dividend Restrictions And Statutory Financial Information [Line Items] |  |  |
Statutory capital and surplus | $ 3,700.0 | $ 2,800.0 |
Statutory net income (loss) | 1,500.0 | 603.0 | $ 681.0
Everest Re |  |  |
Dividend Restrictions And Statutory Financial Information [Line Items] |  |  |
Statutory capital and surplus | 7,000.0 | 5,600.0 |
Statutory net income (loss) | 877.0 | $ 294.0 | $ 336.0
Available for payment of dividends in 2016 without need for prior regulatory approval | $ 877.0 |  |

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