Schedule II. Condensed Financial Information Of Registrant - Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Net investment income	$ 559,932	$ 319,479	$ 354,038
Net foreign exchange gains (losses)	(56,909)	(41,006)	27,773
Net realized and unrealized (losses) gains on investments	(1,800,485)	(218,134)	820,636
Total revenues	5,060,412	5,277,709	5,172,316
Expenses
Interest expense	48,335	47,536	50,453
Operational expenses	276,691	212,184	206,687
Corporate expenses	46,775	41,152	96,970
Total expenses	6,279,247	5,391,817	4,176,396
Net income (loss) attributable to RenaissanceRe	(1,061,203)	(40,155)	762,405
Dividends on preference shares	(35,375)	(33,266)	(30,923)
Net income (loss) available (attributable) to RenaissanceRe common shareholders	(1,096,578)	(73,421)	731,482
Parent Company
Revenues
Net investment income	46,966	38,347	40,502
Net foreign exchange gains (losses)	(46,796)	(10,740)	10,729
Net realized and unrealized (losses) gains on investments	(3,017)	6,212	(4,556)
Total revenues	(2,847)	33,819	46,675
Expenses
Interest expense	15,315	15,315	15,583
Operational expenses	14,818	12,043	8,016
Corporate expenses	39,614	35,946	47,223
Total expenses	69,747	63,304	70,822
Income (loss) before equity in net income of subsidiaries	(72,594)	(29,485)	(24,147)
Equity in net income (loss) of subsidiaries	(988,610)	(10,670)	786,552
Net income (loss) attributable to RenaissanceRe	(1,061,204)	(40,155)	762,405
Dividends on preference shares	(35,375)	(33,266)	(30,923)
Net income (loss) available (attributable) to RenaissanceRe common shareholders	$ (1,096,579)	$ (73,421)	$ 731,482