SUBSEQUENT EVENTS (Details) - USD ($)		3 Months Ended		9 Months Ended
	Oct. 01, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fontana
Subsequent Event [Line Items]
Parent company ownership in redeemable noncontrolling interest		31.60%	31.60%	31.60%	31.60%
Fontana
Subsequent Event [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments		$ 0	$ 0	$ 0	$ 273,684,000
Subsequent Event | Fontana
Subsequent Event [Line Items]
Parent company ownership in redeemable noncontrolling interest	31.60%
Third Party Investor | Common Shares | Subsequent Event | Fontana
Subsequent Event [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments	$ 75,000,000
RenaissanceRe Holdings Ltd. | Common Shares | Subsequent Event | Fontana
Subsequent Event [Line Items]
Sale of shares to redeemable noncontrolling interests, net of adjustments	$ 23,700,000