NONCONTROLLING INTERESTS - Schedule of Activity in Redeemable Noncontrolling Interest (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Activity in redeemable noncontrolling interest
Beginning balance			$ 6,100,831,000
Net income (loss) attributable to redeemable noncontrolling interest	$ 450,176,000	$ 213,695,000	919,734,000	$ 655,986,000
Ending balance	6,860,999,000		6,860,999,000
DaVinci Holdings Ltd.
Activity in redeemable noncontrolling interest
Beginning balance	2,760,164,000	2,267,448,000	2,541,482,000	1,740,300,000
Redemption of shares from redeemable noncontrolling interests	(25,000,000)	(45,777,000)	(406,849,000)	(123,272,000)
Sale of shares to redeemable noncontrolling interests				250,000,000.0
Net income (loss) attributable to redeemable noncontrolling interest	223,288,000	107,881,000	523,812,000	333,490,000
Ending balance	2,958,452,000	2,331,952,000	2,958,452,000	2,331,952,000
DaVinci Holdings Ltd. \| Third-Party Investors And RenaissanceRe
Activity in redeemable noncontrolling interest
Sale of shares to redeemable noncontrolling interests, net of adjustments	0	2,400,000	300,007,000	381,434,000
Medici
Activity in redeemable noncontrolling interest
Beginning balance	1,631,508,000	1,540,520,000	1,650,229,000	1,036,218,000
Redemption of shares from redeemable noncontrolling interests	(83,614,000)	(25,644,000)	(311,164,000)	(43,292,000)
Sale of shares to redeemable noncontrolling interests	15,319,000	16,298,000	183,040,000	430,989,000
Net income (loss) attributable to redeemable noncontrolling interest	123,497,000	60,022,000	183,015,000	167,281,000
Dividends on common shares	(6,190,000)	0	(24,600,000)	0
Ending balance	1,680,520,000	1,591,196,000	1,680,520,000	1,591,196,000
Vermeer
Activity in redeemable noncontrolling interest
Beginning balance	1,489,892,000	1,590,408,000	1,555,297,000	1,490,840,000
Sale of shares to redeemable noncontrolling interests	175,000,000	0	175,000,000	0
Net income (loss) attributable to redeemable noncontrolling interest	73,534,000	51,959,000	183,129,000	151,527,000
Dividends on common shares	0	(175,000,000)	(175,000,000)	(175,000,000)
Ending balance	1,738,426,000	1,467,367,000	1,738,426,000	1,467,367,000
Fontana
Activity in redeemable noncontrolling interest
Beginning balance	453,744,000	277,886,000	353,823,000	268,031,000
Redemption of shares from redeemable noncontrolling interests				0
Sale of shares to redeemable noncontrolling interests	0	0	100,000,000	0
Net income (loss) attributable to redeemable noncontrolling interest	29,857,000	(6,167,000)	29,778,000	3,688,000
Ending balance	$ 483,601,000	$ 271,719,000	$ 483,601,000	$ 271,719,000

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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