NONCONTROLLING INTERESTS - Schedule of Redeemable Noncontrolling Interest Activity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Activity in redeemable noncontrolling interest
Beginning balance	$ 6,100,831
Net income (loss) attributable to redeemable noncontrolling interest	1,090,172	$ 1,058,995	$ (98,613)
Ending balance	6,977,749	6,100,831
DaVinci
Activity in redeemable noncontrolling interest
Beginning balance	2,541,482	1,740,300
Redemption of shares from redeemable noncontrolling interests	(406,849)	(123,272)
Sale of limited partner interest to redeemable noncontrolling interest		250,000
Net income (loss) attributable to redeemable noncontrolling interest	627,055	545,812	(65,514)
Ending balance	3,061,708	2,541,482	1,740,300
DaVinci \| Third-Party Investors And RenaissanceRe
Activity in redeemable noncontrolling interest
Sale of limited partner interest to redeemable noncontrolling interest	300,020	378,642
Medici
Activity in redeemable noncontrolling interest
Beginning balance	1,650,229	1,036,218
Redemption of shares from redeemable noncontrolling interests	(406,644)	(107,549)
Sale of limited partner interest to redeemable noncontrolling interest	200,219	482,310
Net income (loss) attributable to redeemable noncontrolling interest	202,941	239,250	(70,504)
Ending balance	1,646,745	1,650,229	1,036,218
Vermeer
Activity in redeemable noncontrolling interest
Beginning balance	1,555,297	1,490,840
Dividends on common shares	(175,000)	(175,000)
Sale of limited partner interest to redeemable noncontrolling interest	175,000	0
Net income (loss) attributable to redeemable noncontrolling interest	244,560	239,457	43,058
Ending balance	1,799,857	1,555,297	1,490,840
Fontana
Activity in redeemable noncontrolling interest
Beginning balance	353,823	268,031
Sale of limited partner interest to redeemable noncontrolling interest	100,000	51,316
Net income (loss) attributable to redeemable noncontrolling interest	15,616	34,476	(5,653)
Ending balance	$ 469,439	$ 353,823	$ 268,031

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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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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