ACQUISITION OF VALIDUS - Overview (Details) - Validus - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 01, 2023	May 22, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Total purchase price	$ 3,020,168	$ 2,985,000
Total cash consideration paid by RenaissanceRe as acquisition consideration	$ 2,735,000
Shares issued (in shares)	1,322,541
Business acquisition, common shares (in shares)	$ 285,168	$ 250,000
Business acquisition, share price ( in dollars per share)	$ 226.97	$ 189.03
Corporate expenses associated with the acquisition			$ 76,400
Agent relationships - top four
Business Acquisition [Line Items]
Amortization period majority	10 years
Renewal rights
Business Acquisition [Line Items]
Amortization period majority	10 years