Debt and Credit Facilities - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Apr. 02, 2019	Jun. 29, 2017	May 04, 2015	Mar. 24, 2015
Debt Instrument [Line Items]
Long-term debt	$ 1,100,000	$ 1,300,000
Fair Value
Debt Instrument [Line Items]
Long-term debt	1,110,649	1,268,443
Carrying Value
Debt Instrument [Line Items]
Long-term debt	1,170,442	1,168,353
3.600% Senior Notes due 2029
Debt Instrument [Line Items]
Interest rate			3.60%
3.450% Senior Notes due 2027
Debt Instrument [Line Items]
Interest rate				3.45%
3.700% Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate						3.70%
DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci)
Debt Instrument [Line Items]
Interest rate					4.75%
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Fair Value
Debt Instrument [Line Items]
Long-term debt	362,644	432,316
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Carrying Value
Debt Instrument [Line Items]
Long-term debt	394,221	393,305
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Fair Value
Debt Instrument [Line Items]
Long-term debt	280,506	321,204
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Carrying Value
Debt Instrument [Line Items]
Long-term debt	297,775	297,281
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Fair Value
Debt Instrument [Line Items]
Long-term debt	290,874	318,852
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Carrying Value
Debt Instrument [Line Items]
Long-term debt	299,168	298,798
Senior Notes | DaVinci Holdings Ltd. | Fair Value
Debt Instrument [Line Items]
Long-term debt	1,080,649	1,238,443
Senior Notes | DaVinci Holdings Ltd. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	1,140,442	1,138,353
Senior Notes | DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci) | Fair Value
Debt Instrument [Line Items]
Long-term debt	146,625	166,071
Senior Notes | DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci) | Carrying Value
Debt Instrument [Line Items]
Long-term debt	149,278	148,969
Line of Credit | DaVinci Holdings Ltd. | Fair Value
Debt Instrument [Line Items]
Long-term debt	30,000	30,000
Line of Credit | DaVinci Holdings Ltd. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 30,000	$ 30,000