Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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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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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

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Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events (Details) - USD ($)		2 Months Ended	12 Months Ended
Subsequent Events (Details) - USD ($)	Jan. 01, 2024	Feb. 21, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 01, 2024	Jan. 31, 2024
DaVinci Holdings Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Redeemable noncontrolling interest, ownership percentage		23.90%
Medici
Subsequent Event [Line Items]
Redeemable noncontrolling interest, ownership percentage			11.70%	12.80%
Medici \| Subsequent Event
Subsequent Event [Line Items]
Redeemable noncontrolling interest, ownership percentage					11.40%
Fontana \| Subsequent Event
Subsequent Event [Line Items]
Redeemable noncontrolling interest, ownership percentage	26.50%
DaVinci Holdings Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Noncontrolling interest, increase from sale of parent equity interest	$ 300,000,000
Third-Party Investors
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			$ 123,300,000	$ 161,600,000
Third-Party Investors \| Subsequent Event
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests	175,000,000
Fontana \| Subsequent Event
Subsequent Event [Line Items]
Noncontrolling interest, increase from sale of parent equity interest	50,000,000
DaVinci Holdings Ltd.
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			123,272,000	161,570,000
Noncontrolling interest, value subscribed			250,000,000	500,000,000
DaVinci Holdings Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Dividends payable		$ 250,000,000
DaVinci Holdings Ltd. \| Third-Party Investors
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed			102,200,000	284,800,000
DaVinci Holdings Ltd. \| RenaissanceRe Holdings Ltd.
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed			147,800,000	215,200,000
DaVinci Holdings Ltd. \| RenaissanceRe Holdings Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Dividends payable		69,400,000
DaVinci Holdings Ltd. \| Investor \| Other liabilities
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed			300,000,000
Medici
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			107,549,000	100,234,000
Noncontrolling interest, value subscribed			482,310,000	350,136,000
Medici \| Subsequent Event
Subsequent Event [Line Items]
Dividends payable						$ 18,400,000
Medici \| Third-Party Investors
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			117,500,000
Noncontrolling interest, value subscribed			527,300,000
Medici \| RenaissanceRe Holdings Ltd.
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			10,000,000
Noncontrolling interest, value subscribed			45,200,000
Medici \| RenaissanceRe Holdings Ltd. \| Preference shares \| Subsequent Event
Subsequent Event [Line Items]
Investment in variable interest entity		500,000
Payments of capital distributions		0
Medici \| Investor \| Preference shares
Subsequent Event [Line Items]
Investment in variable interest entity			75,000,000
Medici \| Investor \| Preference shares \| Subsequent Event
Subsequent Event [Line Items]
Investment in variable interest entity		127,600,000
Payments of capital distributions		$ 35,600,000
Fontana \| Subsequent Event
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed	100,000,000
Fontana \| Third-Party Investors \| Subsequent Event
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed	50,000,000
Fontana \| RenaissanceRe Holdings Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed	$ 50,000,000
Fontana \| Investor \| Other liabilities
Subsequent Event [Line Items]
Noncontrolling interest, value subscribed			100,000,000
Vermeer Reinsurance Ltd.
Subsequent Event [Line Items]
Redemption of shares from redeemable noncontrolling interests			175,000,000	0
Noncontrolling interest, value subscribed			$ 0	$ 250,000,000
Vermeer Reinsurance Ltd. \| Subsequent Event
Subsequent Event [Line Items]
Dividends payable						$ 175,000,000