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DEBT AND CREDIT FACILITIES - Schedule of Debt Obligations (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt	$ 1,900,000,000	$ 1,900,000,000
Credit facilities issued or drawn	1,426,263,000
Fair Value
Debt Instrument [Line Items]
Long-term debt	1,851,221,000	1,929,052,000
Carrying Value
Debt Instrument [Line Items]
Long-term debt	1,884,411,000	1,958,655,000
Senior Notes | Fair Value
Debt Instrument [Line Items]
Long-term debt	1,851,221,000	1,854,052,000
Senior Notes | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 1,884,411,000	1,883,655,000
Senior Notes | 5.750% Senior Notes due 2033
Debt Instrument [Line Items]
Stated interest rate	5.75%
Senior Notes | 5.750% Senior Notes due 2033 | RenaissanceRe Finance, Inc. | Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 755,573,000	758,783,000
Senior Notes | 5.750% Senior Notes due 2033 | RenaissanceRe Finance, Inc. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 741,359,000	741,124,000
Senior Notes | 3.600% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.60%
Senior Notes | 3.600% Senior Notes due 2029 | RenaissanceRe Finance, Inc. | Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 371,760,000	371,276,000
Senior Notes | 3.600% Senior Notes due 2029 | RenaissanceRe Finance, Inc. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 395,364,000	395,137,000
Senior Notes | 3.450% Senior Notes due 2027
Debt Instrument [Line Items]
Stated interest rate	3.45%
Senior Notes | 3.450% Senior Notes due 2027 | RenaissanceRe Finance, Inc. | Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 282,288,000	283,350,000
Senior Notes | 3.450% Senior Notes due 2027 | RenaissanceRe Finance, Inc. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 298,393,000	298,270,000
Senior Notes | 3.700% Senior Notes due 2025
Debt Instrument [Line Items]
Stated interest rate	3.70%
Senior Notes | 3.700% Senior Notes due 2025 | RenaissanceRe Finance, Inc. | Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 294,525,000	293,154,000
Senior Notes | 3.700% Senior Notes due 2025 | RenaissanceRe Finance, Inc. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	$ 299,630,000	299,537,000
Senior Notes | 4.750% Senior Notes due 2025 (DaVinci) | DaVinci Holdings Ltd.
Debt Instrument [Line Items]
Stated interest rate	4.75%
Senior Notes | 4.750% Senior Notes due 2025 (DaVinci) | DaVinci Holdings Ltd. | Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 147,075,000	147,489,000
Senior Notes | 4.750% Senior Notes due 2025 (DaVinci) | DaVinci Holdings Ltd. | Carrying Value
Debt Instrument [Line Items]
Long-term debt	149,665,000	149,587,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facilities issued or drawn	0
Line of Credit | Medici Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facilities issued or drawn	0
Line of Credit | Medici Revolving Credit Facility | Fair Value | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	0	75,000,000
Line of Credit | Medici Revolving Credit Facility | Carrying Value | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 75,000,000

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Contractual interest rate for funds borrowed, under the debt agreement.

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