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NONCONTROLLING INTERESTS - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Apr. 01, 2022	Dec. 31, 2021
Third-Party Investors
Redeemable Noncontrolling Interest [Line Items]
Redemption of shares from redeemable noncontrolling interest			$ 161,600,000	$ 156,700,000
DaVinci Reinsurance Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments			$ 177,900,000	$ 40,000,000
DaVinci Reinsurance Ltd.
Redeemable Noncontrolling Interest [Line Items]
Parent company ownership in redeemable noncontrolling interest	30.90%	28.70%	30.90%	28.70%		28.70%
Medici
Redeemable Noncontrolling Interest [Line Items]
Parent company ownership in redeemable noncontrolling interest	13.00%	13.40%	13.00%	13.40%
Fontana
Redeemable Noncontrolling Interest [Line Items]
Parent company ownership in redeemable noncontrolling interest	31.60%		31.60%
DaVinciRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments			$ 500,000,000	$ 250,000,000
Redemption of shares from redeemable noncontrolling interest	$ (74,983,000)	$ 637,000	86,586,000	157,863,000
DaVinciRe Holdings Ltd. | Third-Party Investors
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments			284,800,000	150,900,000
DaVinciRe Holdings Ltd. | RenaissanceRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments			$ 215,200,000	99,100,000
DaVinciRe 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, net of adjustments	$ 22,110,000	20,000,000	$ 347,136,000	191,520,000
Redemption of shares from redeemable noncontrolling interest	$ 2,522,000	22,921,000	$ 99,634,000	30,666,000
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			$ 347,100,000
Medici | RenaissanceRe Holdings Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments			$ 10,000,000
Medici | Vermeer Reinsurance Ltd. | Voting, Non-participating Shares
Redeemable Noncontrolling Interest [Line Items]
Parent company ownership in redeemable noncontrolling interest	100.00%		100.00%
PFZW | Vermeer Reinsurance Ltd. | Participating, Non-voting Common Shares
Redeemable Noncontrolling Interest [Line Items]
Parent company ownership in redeemable noncontrolling interest	100.00%		100.00%
Vermeer Reinsurance Ltd.
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments	$ 100,000,000	0	$ 130,000,000	0
Fontana
Redeemable Noncontrolling Interest [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments	0	$ 0	273,684,000	$ 0
Initial commitments	$ 475,000,000		$ 475,000,000
Commitments funded					$ 400,000,000

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