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Condensed Consolidating Financial Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	$ 341,023	$ 125,241
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	5,163,972	4,780,406
Purchases of fixed maturity investments trading	(5,451,362)	(4,984,820)
Proceeds from sales and maturities of fixed maturity investments available for sale	0	5,216
Net sales of equity investments trading	46,305	181,634
Net sales of short term investments	276,075	245,899
Net sales (purchases) of other investments	2,551	(52,778)
Dividends and return of capital from subsidiaries	0	0
Contributions to subsidiaries	0	0
Due (from) to subsidiary	0	0
Net cash provided by investing activities	37,541	175,557
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	(25,877)	(26,198)
Dividends paid – preference shares	(11,191)	(11,191)
RenaissanceRe common share repurchases	(145,940)	(265,003)
Issuance of debt, net of expenses	295,866	0
Repayment of debt	(250,000)	0
Net third party redeemable noncontrolling interest share transactions	(33,655)	(43,909)
Taxes paid on withholding shares	(11,251)	(8,069)
Net cash used in financing activities	(182,048)	(354,370)
Effect of exchange rate changes on foreign currency cash	5,477	2,208
Net increase (decrease) in cash and cash equivalents	201,993	(51,364)
Cash and cash equivalents, beginning of period	421,157	506,885
Cash and cash equivalents, end of period	623,150	455,521
RenRe North America Holdings Inc. (Subsidiary Issuer)
Cash flows used in financing activities
Repayment of debt	0
Platinum Underwriters Finance, Inc. (Subsidiary Issuer)
Cash flows used in financing activities
Repayment of debt	(250,000)
RenaissanceRe Finance, Inc. (Subsidiary Issuer)
Cash flows used in financing activities
Repayment of debt	0
RenaissanceRe Holdings Ltd. (Parent Guarantor)
Cash flows used in financing activities
Repayment of debt	0
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)
Cash flows used in financing activities
Repayment of debt	0
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer)
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	(8,931)	297
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	46,475	50,890
Purchases of fixed maturity investments trading	(45,174)	(105,772)
Proceeds from sales and maturities of fixed maturity investments available for sale		0
Net sales of equity investments trading	(89)	(2,195)
Net sales of short term investments	(1,351)	62,403
Net sales (purchases) of other investments	0	0
Dividends and return of capital from subsidiaries	9,175	2,900
Contributions to subsidiaries	0	0
Due (from) to subsidiary	9	(14,396)
Net cash provided by investing activities	9,045	(6,170)
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	0	0
Dividends paid – preference shares	0	0
RenaissanceRe common share repurchases	0	0
Issuance of debt, net of expenses	0
Net third party redeemable noncontrolling interest share transactions	0	0
Taxes paid on withholding shares	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on foreign currency cash	0	0
Net increase (decrease) in cash and cash equivalents	114	(5,873)
Cash and cash equivalents, beginning of period	162	5,908
Cash and cash equivalents, end of period	276	35
Reportable Legal Entities | Platinum Underwriters Finance, Inc. (Subsidiary Issuer)
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	(5,017)	(3,914)
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	289,741	67,839
Purchases of fixed maturity investments trading	(143,991)	(203,883)
Proceeds from sales and maturities of fixed maturity investments available for sale		0
Net sales of equity investments trading	85,324	193,207
Net sales of short term investments	41,299	(58,367)
Net sales (purchases) of other investments	0	0
Dividends and return of capital from subsidiaries	0	0
Contributions to subsidiaries	0	0
Due (from) to subsidiary	(41)	(92)
Net cash provided by investing activities	272,332	(1,296)
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	0	0
Dividends paid – preference shares	0	0
RenaissanceRe common share repurchases	0	0
Issuance of debt, net of expenses	0
Net third party redeemable noncontrolling interest share transactions	0	0
Taxes paid on withholding shares	0	0
Net cash used in financing activities	(250,000)	0
Effect of exchange rate changes on foreign currency cash	0	0
Net increase (decrease) in cash and cash equivalents	17,315	(5,210)
Cash and cash equivalents, beginning of period	6,671	7,103
Cash and cash equivalents, end of period	23,986	1,893
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer)
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	(27,713)	(24,197)
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	15,449	0
Purchases of fixed maturity investments trading	(265,787)	0
Proceeds from sales and maturities of fixed maturity investments available for sale		0
Net sales of equity investments trading	0	0
Net sales of short term investments	(28,934)	0
Net sales (purchases) of other investments	0	0
Dividends and return of capital from subsidiaries	17,975	0
Contributions to subsidiaries	(9,175)	0
Due (from) to subsidiary	1,278	24,134
Net cash provided by investing activities	(269,194)	24,134
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	0	0
Dividends paid – preference shares	0	0
RenaissanceRe common share repurchases	0	0
Issuance of debt, net of expenses	295,866
Net third party redeemable noncontrolling interest share transactions	0	0
Taxes paid on withholding shares	0	0
Net cash used in financing activities	295,866	0
Effect of exchange rate changes on foreign currency cash	0	0
Net increase (decrease) in cash and cash equivalents	(1,041)	(63)
Cash and cash equivalents, beginning of period	9,397	677
Cash and cash equivalents, end of period	8,356	614
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor)
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	(11,924)	(11,131)
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	53,654	210,933
Purchases of fixed maturity investments trading	(105,523)	(324,462)
Proceeds from sales and maturities of fixed maturity investments available for sale		0
Net sales of equity investments trading	0	0
Net sales of short term investments	298,768	195,915
Net sales (purchases) of other investments	0	0
Dividends and return of capital from subsidiaries	167,111	341,011
Contributions to subsidiaries	(200,000)	(95,001)
Due (from) to subsidiary	(12,477)	(22,676)
Net cash provided by investing activities	201,533	305,720
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	(25,877)	(26,198)
Dividends paid – preference shares	(11,191)	(11,191)
RenaissanceRe common share repurchases	(145,940)	(265,003)
Issuance of debt, net of expenses	0
Net third party redeemable noncontrolling interest share transactions	0	0
Taxes paid on withholding shares	(11,251)	0
Net cash used in financing activities	(194,259)	(302,392)
Effect of exchange rate changes on foreign currency cash	0	0
Net increase (decrease) in cash and cash equivalents	(4,650)	(7,803)
Cash and cash equivalents, beginning of period	7,067	10,185
Cash and cash equivalents, end of period	2,417	2,382
Reportable Legal Entities | Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)
Cash flows (used in) provided by operating activities
Net cash provided by (used in) operating activities	394,608	164,186
Cash flows provided by investing activities
Proceeds from sales and maturities of fixed maturity investments trading	4,758,653	4,450,744
Purchases of fixed maturity investments trading	(4,890,887)	(4,350,703)
Proceeds from sales and maturities of fixed maturity investments available for sale		5,216
Net sales of equity investments trading	(38,930)	(9,378)
Net sales of short term investments	(33,707)	45,948
Net sales (purchases) of other investments	2,551	(52,778)
Dividends and return of capital from subsidiaries	(194,261)	(343,911)
Contributions to subsidiaries	209,175	95,001
Due (from) to subsidiary	11,231	13,030
Net cash provided by investing activities	(176,175)	(146,831)
Cash flows used in financing activities
Dividends paid – RenaissanceRe common shares	0	0
Dividends paid – preference shares	0	0
RenaissanceRe common share repurchases	0	0
Issuance of debt, net of expenses	0
Net third party redeemable noncontrolling interest share transactions	(33,655)	(43,909)
Taxes paid on withholding shares	0	(8,069)
Net cash used in financing activities	(33,655)	(51,978)
Effect of exchange rate changes on foreign currency cash	5,477	2,208
Net increase (decrease) in cash and cash equivalents	190,255	(32,415)
Cash and cash equivalents, beginning of period	397,860	483,012
Cash and cash equivalents, end of period	$ 588,115	$ 450,597

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The cash inflow associated with the sale, maturities, repayments and calls of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time).

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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