Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows provided by (used in) operating activities
Net income (loss)	$ 1,631,592	$ (1,853,149)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Amortization, accretion and depreciation	(121,068)	(1,220)
Equity in undistributed (earnings) losses of other ventures	(2,566)	16,802
Net realized and unrealized (gains) losses on investments	149,122	1,806,678
Change in:
Premiums receivable	(789,338)	(1,697,763)
Prepaid reinsurance premiums	(7,504)	(378,829)
Reinsurance recoverable	457,666	(700,575)
Deferred acquisition costs	(95,350)	(331,996)
Reserve for claims and claim expenses	62,592	2,368,325
Unearned premiums	663,389	1,514,937
Reinsurance balances payable	(604,675)	297,647
Other	55,279	(170,369)
Net cash provided by (used in) operating activities	1,399,139	870,488
Cash flows provided by (used in) investing activities
Proceeds from sales and maturities of fixed maturity investments trading	15,300,245	18,502,364
Purchases of fixed maturity investments trading	(17,053,131)	(19,863,469)
Net sales (purchases) of equity investments	564,316	(337,110)
Net sales (purchases) of short term investments	(1,777,188)	365,790
Net sales (purchases) of other investments	(525,950)	(452,447)
Net sales (purchases) of investments in other ventures	(20,171)
Net sales (purchases) of investments in other ventures		617
Return of investment from investment in other ventures	2,752	2,222
Net cash provided by (used in) investing activities	(3,509,127)	(1,782,033)
Cash flows provided by (used in) financing activities
Dividends paid – RenaissanceRe common shares	(55,239)	(48,576)
Dividends paid – preference shares	(26,531)	(26,587)
RenaissanceRe common share issuance, net of expenses	1,351,608	0
RenaissanceRe common share repurchases	0	(166,664)
Issuance of debt, net of expenses	740,581	0
Repayment of debt	(30,000)	0
Net third-party redeemable noncontrolling interest share transactions	143,721	477,707
Taxes paid on withholding shares	(20,004)	(10,891)
Net cash provided by (used in) financing activities	2,104,136	224,989
Effect of exchange rate changes on foreign currency cash	7,397	31,778
Net increase (decrease) in cash and cash equivalents	1,545	(654,778)
Cash and cash equivalents, beginning of period	1,194,339	1,859,019
Cash and cash equivalents, end of period	$ 1,195,884	$ 1,204,241