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NONCONTROLLING INTERESTS - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
DaVinci Reinsurance Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | $ 69,700,000 | $ 300,000,000.0 |
Proceeds from noncontrolling interests |  |  | 0 |  |
Third-Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Redemption of shares from redeemable noncontrolling interest |  |  | 26,900,000 | 201,100,000 |
RenaissanceRe Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Proceeds from noncontrolling interests |  |  |  | 92,400,000 |
Payments to noncontrolling interests |  |  |  | 200,900,000 |
DaVinci Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Proceeds from noncontrolling interests |  |  |  | 0 |
Payments to noncontrolling interests |  |  | 26,900,000 | 381,700,000 |
Medici |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Proceeds from noncontrolling interests |  |  | 103,800,000 |  |
Payments to noncontrolling interests |  |  | 359,600,000 |  |
Fontana Third Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 100,000,000.0 | 50,000,000 |
Redemption of shares from redeemable noncontrolling interest |  |  | 72,000,000.0 |  |
Proceeds from noncontrolling interests |  |  | 0 | 0 |
Payments to noncontrolling interests |  |  | 72,000,000.0 |  |
DaVinci Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Redemption of shares from redeemable noncontrolling interest | $ 0 | $ 26,147,000 | $ 26,929,000 | 381,849,000 |
DaVinci Holdings Ltd. | Third-Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Payments to noncontrolling interests |  |  |  | 180,600,000 |
DaVinci Holdings Ltd. | RenaissanceRe Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Payments to noncontrolling interests |  |  |  | 69,400,000 |
DaVinci Holdings Ltd. | Maximum |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Share repurchase requests, limit | 25.00% |  | 25.00% |  |
Medici |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests | $ 81,329,000 | 21,479,000 | $ 142,932,000 | 167,721,000 |
Redemption of shares from redeemable noncontrolling interest | 56,734,000 | 181,983,000 | $ 295,529,000 | 227,550,000 |
Redemption provision, notice period |  |  | 30 days |  |
Medici | Third-Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | $ 192,900,000 | 167,200,000 |
Redemption of shares from redeemable noncontrolling interest |  |  | 495,500,000 | 227,300,000 |
Payments of dividends |  |  | 15,300,000 | 18,400,000 |
Medici | RenaissanceRe Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 50,100,000 |  |
Redemption of shares from redeemable noncontrolling interest |  |  | 200,000,000.0 |  |
RenaissanceRe Medici UCITS Fund |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Transfer in kind from existing investors |  |  | 316,500,000 |  |
RenaissanceRe Medici UCITS Fund | Third-Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 348,700,000 |  |
RenaissanceRe Medici UCITS Fund | RenaissanceRe Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 140,000,000.0 |  |
Vermeer |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 0 |  |
Vermeer | PFZW |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Payments of dividends |  |  | 0 | 175,000,000.0 |
Fontana |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests | 0 | 0 | 129,155,000 | 100,000,000 |
Redemption of shares from redeemable noncontrolling interest | $ 0 | $ 0 | 72,044,000 | 0 |
Fontana | Third-Party Investors |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | 100,000,000.0 | 100,000,000.0 |
Fontana | RenaissanceRe Holdings Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Sale of shares to redeemable noncontrolling interests |  |  | $ 70,800,000 | $ 50,000,000 |
DaVinci Reinsurance Ltd. |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Noncontrolling ownership percentage | 24.30% | 24.70% | 24.30% | 24.70% | 25.40%
Medici |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Noncontrolling ownership percentage | 9.70% | 12.40% | 9.70% | 12.40% |
Vermeer | Medici | Voting, Non-participating Shares |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Parent company ownership in redeemable noncontrolling interest | 100.00% |  | 100.00% |  |
Vermeer | PFZW | Participating, Non-voting Common Shares |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Parent company ownership in redeemable noncontrolling interest | 100.00% |  | 100.00% |  |
Fontana |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |
Noncontrolling ownership percentage | 28.70% | 26.50% | 28.70% | 26.50% |

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- Definition This item limits the aggregate of all share repurchase requests to 25% of DaVinciRe's capital in any given year and satisfying all applicable regulatory requirements. If total shareholder requests exceed 25% of DaVinciRe's capital, the number of shares repurchased will be reduced among the requesting shareholders pro-rata, based on the amounts desired to be repurchased. + References No definition available. + Details
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