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DEBT AND CREDIT FACILITIES - Narrative (Details) - Senior Notes - USD ($) | Apr. 01, 2025 | Mar. 05, 2025 | Feb. 25, 2025 | Mar. 31, 2025 | Mar. 24, 2015
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5.950% Senior Notes due 2035 (DaVinci) | DaVinci Holdings Ltd. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 5.95% |  | 5.95% |
Principal amount |  | $ 300,000,000.0 |  |  |
4.750% Senior Notes due 2025 (DaVinci) | DaVinci Holdings Ltd. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 4.75% |  | 4.75% |
Repayments of debt |  | $ 150,000,000.0 |  |  |
5.800% Senior Notes Due 2035 | RenaissanceRe Finance, Inc. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 5.80% | 5.80% |
Principal amount |  |  | $ 500,000,000.0 |  |
Issuance of debt, net of expenses |  |  | $ 493,500,000 |  |
3.700% Senior Notes due 2025 | RenaissanceRe Finance, Inc. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 3.70% | 3.70%
Principal amount |  |  |  |  | $ 300,000,000.0
3.700% Senior Notes due 2025 | RenaissanceRe Finance, Inc. | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage | 3.70% |  |  |  |
Repayments of debt | $ 300,000,000.0 |  |  |  |

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