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NONCONTROLLING INTERESTS - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
DaVinci Reinsurance Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | $ 300,000,000 | $ 275,000,000 |
Third-Party Investors |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Redemption of shares from redeemable noncontrolling interest | 175,000,000 | $ 50,200,000 |
DaVinci Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Payments to noncontrolling interests | 355,600,000 |  |
Proceeds from noncontrolling interests | 0 |  |
Medici |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Payments to noncontrolling interests | 59,400,000 |  |
Proceeds from noncontrolling interests | 70,700,000 |  |
Fontana Third Party Investors |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | 50,000,000 |  |
Proceeds from noncontrolling interests | $ 0 |  |
DaVinci Reinsurance Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Parent company ownership in redeemable noncontrolling interest | 23.90% | 25.40% | 27.80%
Medici |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Parent company ownership in redeemable noncontrolling interest | 11.40% | 10.80% |
Fontana |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Parent company ownership in redeemable noncontrolling interest | 26.50% | 31.60% |
DaVinci Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments |  | $ 250,000,000 |
Redemption of shares from redeemable noncontrolling interest | $ 355,702,000 | 50,175,000 |
DaVinci Holdings Ltd. | Third-Party Investors |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments |  | 102,200,000 |
DaVinci Holdings Ltd. | DaVinci Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Payments to noncontrolling interests | 355,600,000 |  |
DaVinci Holdings Ltd. | RenaissanceRe Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments |  | 147,800,000 |
Payments to noncontrolling interests | $ 69,400,000 |  |
DaVinci Holdings Ltd. | Maximum |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Share repurchase requests, limit | 25.00% |  |
Medici |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | $ 146,242,000 | 244,102,000 |
Redemption of shares from redeemable noncontrolling interest | $ 45,567,000 | 17,648,000 |
Redemption provision, notice period | 30 days |  |
Medici | Third-Party Investors |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | $ 146,200,000 | 244,100,000 |
Redemption of shares from redeemable noncontrolling interest | 45,600,000 |  |
Payments of dividends | $ 18,400,000 |  |
Medici | RenaissanceRe Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments |  | 100,000 |
Medici | Vermeer | Voting, Non-participating Shares |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Parent company ownership in redeemable noncontrolling interest | 100.00% |  |
Vermeer |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments |  | 0 |
Redemption of shares from redeemable noncontrolling interest | $ 175,000,000 | 0 |
Vermeer | PFZW |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Payments of dividends | $ 175,000,000 |  |
PFZW | Vermeer | Participating, Non-voting Common Shares |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Parent company ownership in redeemable noncontrolling interest | 100.00% |  |
Fontana |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | $ 100,000,000 | 0 |
Redemption of shares from redeemable noncontrolling interest |  | $ 0 |
Fontana | Third-Party Investors |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | 100,000,000 |  |
Fontana | RenaissanceRe Holdings Ltd. |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |
Sale of shares to redeemable noncontrolling interests, net of adjustments | $ 50,000,000 |  |

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