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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

X

- Definition

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