Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Gross premiums written	$ 1,618,443	$ 2,220,661	$ 7,060,325	$ 7,628,264
Net premiums written	1,421,260	1,821,711	5,880,766	5,850,544
Decrease (increase) in unearned premiums	334,616	(54,690)	(659,078)	(1,140,715)
Net premiums earned	1,755,876	1,767,021	5,221,688	4,709,829
Net investment income	329,108	157,793	876,148	348,695
Net foreign exchange gains (losses)	(25,886)	(1,383)	(53,877)	(67,690)
Equity in earnings (losses) of other ventures	10,842	1,739	28,072	2,732
Other income (loss)	(5,866)	2,834	(6,296)	4,950
Net realized and unrealized gains (losses) on investments	(228,087)	(641,500)	(171,417)	(1,968,624)
Total revenues	1,835,987	1,286,504	5,894,318	3,029,892
Expenses
Net claims and claim expenses incurred	861,576	1,967,931	2,593,987	3,515,903
Acquisition expenses	425,745	417,644	1,280,547	1,155,389
Operational expenses	82,751	64,560	240,716	204,987
Corporate expenses	17,143	10,384	53,357	35,238
Interest expense	22,951	12,101	49,980	35,951
Total expenses	1,410,166	2,472,620	4,218,587	4,947,468
Income (loss) before taxes	425,821	(1,186,116)	1,675,731	(1,917,576)
Income tax benefit (expense)	(9,295)	(2,814)	(44,139)	64,427
Net income (loss)	416,526	(1,188,930)	1,631,592	(1,853,149)
Net (income) loss attributable to redeemable noncontrolling interests	(213,695)	372,429	(655,986)	335,010
Net income (loss) attributable to RenaissanceRe	202,831	(816,501)	975,606	(1,518,139)
Dividends on preference shares	(8,843)	(8,843)	(26,531)	(26,531)
Net income (loss) available (attributable) to RenaissanceRe common shareholders	$ 193,988	$ (825,344)	$ 949,075	$ (1,544,670)
Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – basic (in dollars per share)	$ 3.81	$ (19.27)	$ 20.17	$ (35.84)
Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – diluted (in dollars per share)	$ 3.80	$ (19.27)	$ 20.13	$ (35.84)