Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Gross premiums written (Note 6)	$ 9,213,540	$ 7,833,798	$ 5,806,165
Net premiums written (Note 6)	7,196,160	5,939,375	4,096,333
Increase in unearned premiums	(862,171)	(745,194)	(143,871)
Net premiums earned (Note 6)	6,333,989	5,194,181	3,952,462
Net investment income (Note 4)	559,932	319,479	354,038
Net foreign exchange gains (losses)	(56,909)	(41,006)	27,773
Equity in earnings of other ventures (Note 4)	11,249	12,309	17,194
Other income	12,636	10,880	213
Net realized and unrealized gains (losses) on investments	(1,800,485)	(218,134)	820,636
Total revenues	5,060,412	5,277,709	5,172,316
Expenses
Net claims and claim expenses incurred (Notes 6 and 7)	4,338,840	3,876,087	2,924,609
Acquisition expenses	1,568,606	1,214,858	897,677
Operational expenses	276,691	212,184	206,687
Corporate expenses	46,775	41,152	96,970
Interest expense (Note 8)	48,335	47,536	50,453
Total expenses	6,279,247	5,391,817	4,176,396
Income (loss) before taxes	(1,218,835)	(114,108)	995,920
Income tax benefit (expense) (Note 14)	59,019	10,668	(2,862)
Net income (loss)	(1,159,816)	(103,440)	993,058
Net (income) loss attributable to redeemable noncontrolling interests (Note 9)	98,613	63,285	(230,653)
Net income (loss) attributable to RenaissanceRe	(1,061,203)	(40,155)	762,405
Dividends on preference shares (Note 11)	(35,375)	(33,266)	(30,923)
Net income (loss) available (attributable) to RenaissanceRe common shareholders	$ (1,096,578)	$ (73,421)	$ 731,482
Net income (loss) available to RenaissanceRe common shareholders per common share – basic (in usd per share)	$ (25.50)	$ (1.57)	$ 15.34
Net income (loss) available to RenaissanceRe common shareholders per common share – diluted (in usd per share)	$ (25.50)	$ (1.57)	$ 15.31