Noncontrolling Interests - Schedule of Redeemable Noncontrolling Interest Activity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Activity in redeemable noncontrolling interest
Beginning balance	$ 3,554,053
Net income (loss) attributable to redeemable noncontrolling interests	(98,613)	$ (63,285)	$ 230,653
Ending balance	4,535,389	3,554,053
DaVinci Holdings Ltd.
Activity in redeemable noncontrolling interest
Beginning balance	1,499,451	1,560,693
Redemption of shares from redeemable noncontrolling interests, net of adjustments	(161,570)	(157,864)
Sale of shares to redeemable noncontrolling interests	500,000	250,000
Net income (loss) attributable to redeemable noncontrolling interests	(65,514)	(102,932)	113,671
Ending balance	1,740,300	1,499,451	1,560,693
DaVinci Holdings Ltd. \| Third-Party Investors And RenaissanceRe
Activity in redeemable noncontrolling interest
Sale of shares to redeemable noncontrolling interests	467,933	199,554
Medici
Activity in redeemable noncontrolling interest
Beginning balance	856,820	717,999
Redemption of shares from redeemable noncontrolling interests, net of adjustments	(100,234)	(64,191)
Sale of shares to redeemable noncontrolling interests	350,136	201,520
Net income (loss) attributable to redeemable noncontrolling interests	(70,504)	1,492	55,970
Ending balance	1,036,218	856,820	717,999
Vermeer Reinsurance Ltd.
Activity in redeemable noncontrolling interest
Beginning balance	1,197,782	1,109,627
Sale of shares to redeemable noncontrolling interests	250,000	50,000
Net income (loss) attributable to redeemable noncontrolling interests	43,058	38,155	61,012
Ending balance	1,490,840	1,197,782	1,109,627
Fontana Holdings L.P.
Activity in redeemable noncontrolling interest
Beginning balance	0	0
Sale of shares to redeemable noncontrolling interests	273,684	0
Net income (loss) attributable to redeemable noncontrolling interests	(5,653)	0	0
Ending balance	$ 268,031	$ 0	$ 0

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 (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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