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NONCONTROLLING INTERESTS - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
DaVinci Reinsurance Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			$ 300,000,000.0	$ 275,000,000.0
Third-Party Investors
Redeemable Noncontrolling Interest [Line Items]
Redemption of shares from redeemable noncontrolling interest			225,900,000	123,300,000
DaVinci Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Payments to noncontrolling interests			225,900,000
Medici
Redeemable Noncontrolling Interest [Line Items]
Payments to noncontrolling interests			270,000,000.0
Proceeds from noncontrolling interests			114,200,000
Fontana Third Party Investors
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			50,000,000.0
DaVinci Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests				250,000,000.0
Redemption of shares from redeemable noncontrolling interest	$ 25,000,000	$ 45,777,000	406,849,000	123,272,000
DaVinci Holdings Ltd. | Third-Party Investors
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests				102,200,000
Payments to noncontrolling interests			180,600,000
DaVinci Holdings Ltd. | RenaissanceRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests				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%		25.00%
Medici
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests	$ 15,319,000	16,298,000	$ 183,040,000	430,989,000
Redemption of shares from redeemable noncontrolling interest	83,614,000	25,644,000	$ 311,164,000	43,292,000
Redemption provision, notice period			30 days
Medici | Third-Party Investors
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			$ 233,000,000.0	456,000,000.0
Redemption of shares from redeemable noncontrolling interest			311,200,000
Payments of dividends			24,600,000
Medici | RenaissanceRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			50,600,000	25,100,000
Redemption of shares from redeemable noncontrolling interest			300,000
Vermeer
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests	175,000,000	0	175,000,000	0
Vermeer | PFZW
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			175,000,000.0
Redemption of shares from redeemable noncontrolling interest				175,000,000.0
Payments of dividends			175,000,000.0
Fontana
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests	$ 0	$ 0	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			100,000,000.0
Fontana | RenaissanceRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests			$ 50,000,000.0
DaVinci Reinsurance Ltd.
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling ownership percentage	25.40%	27.80%	25.40%	27.80%	27.80%
Medici
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling ownership percentage	15.10%	10.80%	15.10%	10.80%
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	26.50%	31.60%	26.50%	31.60%

X

- 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.

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