Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows provided by (used in) operating activities
Net income (loss)	$ 1,215,066	$ (664,219)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Amortization, accretion and depreciation	(73,232)	9,583
Equity in undistributed (earnings) losses of other ventures	2,831	13,961
Net realized and unrealized (gains) losses on investments	(109,559)	1,220,758
Change in:
Premiums receivable	(1,351,415)	(1,626,675)
Prepaid reinsurance premiums	(165,765)	(499,843)
Reinsurance recoverable	21,574	62,210
Deferred acquisition costs	(129,254)	(240,266)
Reserve for claims and claim expenses	245,555	148,176
Unearned premiums	1,158,195	1,586,004
Reinsurance balances payable	(147,871)	524,871
Other	(39,451)	(265,391)
Net cash provided by (used in) operating activities	626,674	269,169
Cash flows provided by (used in) investing activities
Proceeds from sales and maturities of fixed maturity investments trading	8,149,227	10,527,219
Purchases of fixed maturity investments trading	(9,719,075)	(11,743,171)
Net sales (purchases) of equity investments	546,399	(286,399)
Net sales (purchases) of short term investments	(1,656,772)	939,736
Net sales (purchases) of other investments	(490,366)	(397,523)
Net sales (purchases) of investments in other ventures	(13,048)
Net sales (purchases) of investments in other ventures		2,391
Return of investment from investment in other ventures	2,369	2,213
Net cash provided by (used in) investing activities	(3,181,266)	(955,534)
Cash flows provided by (used in) financing activities
Dividends paid – RenaissanceRe common shares	(35,992)	(32,437)
Dividends paid – preference shares	(17,688)	(17,780)
RenaissanceRe common share issuance, net of expenses	1,352,583	0
RenaissanceRe common share repurchases	0	(141,356)
Issuance of debt, net of expenses	741,597	0
Repayment of debt	(30,000)	0
Net third-party redeemable noncontrolling interest share transactions	310,135	408,774
Taxes paid on withholding shares	(18,837)	(10,848)
Net cash provided by (used in) financing activities	2,301,798	206,353
Effect of exchange rate changes on foreign currency cash	2,390	19,088
Net increase (decrease) in cash and cash equivalents	(250,404)	(460,924)
Cash and cash equivalents, beginning of period	1,194,339	1,859,019
Cash and cash equivalents, end of period	$ 943,935	$ 1,398,095