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Debt and Credit Facilities - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jun. 05, 2023 | Dec. 31, 2022 | Apr. 02, 2019 | Jun. 29, 2017 | May 04, 2015 | Mar. 24, 2015
--- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | $ 1,900,000 |  | $ 1,100,000 |  |  |  |
Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 1,929,052 |  | 1,110,649 |  |  |  |
Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | $ 1,958,655 |  | 1,170,442 |  |  |  |
3.600% Senior Notes due 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.60% |  |  | 3.60% |  |  |
3.450% Senior Notes due 2027 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.45% |  |  |  | 3.45% |  |
3.700% Senior Notes due 2025 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.70% |  |  |  |  |  | 3.70%
DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.75% |  |  |  |  | 4.75% |
Senior Notes | 5.750% Senior Notes due 2033 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 5.75% | 5.75% |  |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 5.750% Senior Notes due 2033 | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | $ 758,783 |  | 0 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 5.750% Senior Notes due 2033 | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 741,124 |  | 0 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 371,276 |  | 362,644 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 395,137 |  | 394,221 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 283,350 |  | 280,506 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 298,270 |  | 297,775 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 293,154 |  | 290,874 |  |  |  |
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 299,537 |  | 299,168 |  |  |  |
Senior Notes | DaVinci Holdings Ltd. | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 1,854,052 |  | 1,080,649 |  |  |  |
Senior Notes | DaVinci Holdings Ltd. | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 1,883,655 |  | 1,140,442 |  |  |  |
Senior Notes | DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci) | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 147,489 |  | 146,625 |  |  |  |
Senior Notes | DaVinci Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinci) | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 149,587 |  | 149,278 |  |  |  |
Line of Credit | DaVinci Holdings Ltd. | Fair Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | 75,000 |  | 30,000 |  |  |  |
Line of Credit | DaVinci Holdings Ltd. | Carrying Value |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt | $ 75,000 |  | $ 30,000 |  |  |  |

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