ACQUISITION OF VALIDUS (Details) - Validus Acquisition $ / shares in Units, $ in Millions	May 22, 2023 USD ($) $ / shares
Restructuring Cost and Reserve [Line Items]
Net purchase price	$ 2,985.0
Cash consideration paid by RenaissanceRe as acquisition consideration	2,735.0
Market value of RenaissanceRe common shares issued by RenaissanceRe to Tokio	$ 250.0
Business acquisition, share price ( in dollars per share) \| $ / shares	$ 189.03
Business combination, estimated excess tangible book value threshold for future dividends	$ 2,100.0
AIG
Restructuring Cost and Reserve [Line Items]
Business combination, risk reward percentage	95.00%

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