Schedule II. Condensed Financial Information Of Registrant - Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 2,561,132	$ (1,061,203)	$ (40,155)
Change in net unrealized gains (losses) on investments, net of tax	1,082	(4,923)	(2,492)
Foreign currency translation adjustments, net of tax	169	370	4,225
Comprehensive income (loss) attributable to RenaissanceRe	2,562,383	(1,065,756)	(38,422)
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	2,561,131	(1,061,204)	(40,155)
Change in net unrealized gains (losses) on investments, net of tax	1,082	(4,923)	(2,492)
Foreign currency translation adjustments, net of tax	169	370	4,225
Comprehensive income (loss) attributable to RenaissanceRe	$ 2,562,382	$ (1,065,757)	$ (38,422)