Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Gross premiums written (Note 7)	$ 8,862,366	$ 9,213,540	$ 7,833,798
Net premiums written (Note 7)	7,467,813	7,196,160	5,939,375
Decrease (increase) in unearned premiums	3,320	(862,171)	(745,194)
Net premiums earned (Note 7)	7,471,133	6,333,989	5,194,181
Net investment income (Note 5)	1,253,110	559,932	319,479
Net foreign exchange gains (losses)	(41,479)	(56,909)	(41,006)
Equity in earnings (losses) of other ventures (Note 5)	43,474	11,249	12,309
Other income (loss)	(6,152)	12,636	10,880
Net realized and unrealized gains (losses) on investments	414,522	(1,800,485)	(218,134)
Total revenues	9,134,608	5,060,412	5,277,709
Expenses
Net claims and claim expenses incurred (Notes 7 and 8)	3,573,509	4,338,840	3,876,087
Acquisition expenses	1,875,034	1,568,606	1,214,858
Operational expenses	375,182	276,691	212,184
Corporate expenses	127,642	46,775	41,152
Interest expense (Note 9)	73,181	48,335	47,536
Total expenses	6,024,548	6,279,247	5,391,817
Income (loss) before taxes	3,110,060	(1,218,835)	(114,108)
Income tax benefit (expense) (Note 15)	510,067	59,019	10,668
Net income (loss)	3,620,127	(1,159,816)	(103,440)
Net (income) loss attributable to redeemable noncontrolling interests (Note 10)	(1,058,995)	98,613	63,285
Net income (loss) attributable to RenaissanceRe	2,561,132	(1,061,203)	(40,155)
Dividends on preference shares (Note 12)	(35,375)	(35,375)	(33,266)
Net income (loss) available (attributable) to RenaissanceRe common shareholders	$ 2,525,757	$ (1,096,578)	$ (73,421)
Net income (loss) available to RenaissanceRe common shareholders per common share – basic (in usd per share)	$ 52.40	$ (25.50)	$ (1.57)
Net income (loss) available to RenaissanceRe common shareholders per common share – diluted (in usd per share)	$ 52.27	$ (25.50)	$ (1.57)