Schedule II. Condensed Financial Information Of Registrant - Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (1,061,203)	$ (40,155)	$ 762,405
Change in net unrealized gains (losses) on investments, net of tax	(4,923)	(2,492)	606
Foreign currency translation adjustments, net of tax	370	4,225	(11,309)
Comprehensive income (loss) attributable to RenaissanceRe	(1,065,756)	(38,422)	751,702
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(1,061,204)	(40,155)	762,405
Change in net unrealized gains (losses) on investments, net of tax	(4,923)	(2,492)	606
Foreign currency translation adjustments, net of tax	370	4,225	(11,309)
Comprehensive income (loss) attributable to RenaissanceRe	$ (1,065,757)	$ (38,422)	$ 751,702