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ACQUISITION OF VALIDUS - Schedule of Supplemental Pro Forma Information (Details) - Validus - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |
Total revenues | $ 11,611,682 | $ 7,169,338
Net income (loss) available (attributable) to RenaissanceRe common shareholders | $ 2,926,518 | $ (1,552,425)

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