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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
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Jun. 30, 2015 | Jun. 30, 2014
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | $ (29,370) | $ 173,386
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 4,761,975 | 4,020,174
Purchases of fixed maturity investments trading | (4,596,118) | (3,970,317)
Proceeds from sales and maturities of fixed maturity investments available for sale | 5,000 | 5,114
Net purchases of equity investments trading | (166,485) | (11,146)
Net sales (purchases) of short term investments | 360,162 | 89,549
Net (purchases) sales of other investments | (1,250) | 68,684
Net (purchases) sales of investments in other ventures | (45) | 1,030
Net (purchases) sales of other assets | 4,500 | 6,000
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | 0
Due (from) to subsidiary | 0 | 0
Net purchase of Platinum | 678,152 | 0
Net cash (used in) provided by investing activities | (310,413) | 209,088
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | (27,479) | (23,550)
Dividends paid – preference shares | (11,191) | (11,191)
RenaissanceRe common share repurchases | (736) | (314,536)
Net issuance (repayment) of debt | 445,589 | 0
Net third party redeemable noncontrolling interest share transactions | (187,064) | (144,096)
Net cash provided by (used in) financing activities | 219,119 | (493,373)
Effect of exchange rate changes on foreign currency cash | (6,830) | (2,676)
Net decrease in cash and cash equivalents | (127,494) | (113,575)
Cash and cash equivalents, beginning of period | 525,584 | 408,032
Cash and cash equivalents, end of period | 398,090 | 294,457
RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | 66,113 | (14,828)
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 14,718 | 4,912
Purchases of fixed maturity investments trading | (56,559) | (79,714)
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 | 0
Net purchases of equity investments trading | 0 | 0
Net sales (purchases) of short term investments | (1,088) | 116,511
Net (purchases) sales of other investments | 0 | 0
Net (purchases) sales of investments in other ventures | 0 | 0
Net (purchases) sales of other assets | 0 | 0
Dividends and return of capital from subsidiaries | 1,009,161 | 359,891
Contributions to subsidiaries | 205,362 | 47,220
Due (from) to subsidiary | (3,595) | 4,123
Net purchase of Platinum | 904,433 |
Net cash (used in) provided by investing activities | (147,158) | 358,503
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | (27,479) | (23,550)
Dividends paid – preference shares | (11,191) | (11,191)
RenaissanceRe common share repurchases | (736) | (314,536)
Net issuance (repayment) of debt | 117,000 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Net cash provided by (used in) financing activities | 77,594 | (349,277)
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | (3,451) | (5,602)
Cash and cash equivalents, beginning of period | 5,986 | 8,796
Cash and cash equivalents, end of period | 2,535 | 3,194
Platinum Underwriters Holdings, Ltd. |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | (1,326) |
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 0 |
Purchases of fixed maturity investments trading | 0 |
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 |
Net purchases of equity investments trading | 0 |
Net sales (purchases) of short term investments | 0 |
Net (purchases) sales of other investments | 0 |
Net (purchases) sales of investments in other ventures | 0 |
Net (purchases) sales of other assets | 0 |
Dividends and return of capital from subsidiaries | (30,000) |
Contributions to subsidiaries | 0 |
Due (from) to subsidiary | (21,913) |
Net purchase of Platinum | (62,420) |
Net cash (used in) provided by investing activities | 10,507 |
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 |
Dividends paid – preference shares | 0 |
RenaissanceRe common share repurchases | 0 |
Net issuance (repayment) of debt | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 |
Net cash provided by (used in) financing activities | 0 |
Effect of exchange rate changes on foreign currency cash | 0 |
Net decrease in cash and cash equivalents | 9,181 |
Cash and cash equivalents, beginning of period | 0 |
Cash and cash equivalents, end of period | 9,181 |
RenRe North America Holdings Inc. |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | (5,393) | (8,410)
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 7,016 | 5,353
Purchases of fixed maturity investments trading | (38,668) | 0
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 | 0
Net purchases of equity investments trading | 33,687 | (370)
Net sales (purchases) of short term investments | (5,848) | (68)
Net (purchases) sales of other investments | 0 | 0
Net (purchases) sales of investments in other ventures | 0 | 0
Net (purchases) sales of other assets | 0 | 0
Dividends and return of capital from subsidiaries | 0 | 5,406
Contributions to subsidiaries | (10,342) | 1,950
Due (from) to subsidiary | (23) | (777)
Net purchase of Platinum | 0 |
Net cash (used in) provided by investing activities | 6,506 | 7,594
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
RenaissanceRe common share repurchases | 0 | 0
Net issuance (repayment) of debt | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Net cash provided by (used in) financing activities | 0 | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | 1,113 | (816)
Cash and cash equivalents, beginning of period | 1,033 | 4,027
Cash and cash equivalents, end of period | 2,146 | 3,211
Platinum Underwriters Finance, Inc. |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | (10,030) |
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 45,087 |
Purchases of fixed maturity investments trading | 0 |
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 |
Net purchases of equity investments trading | (273,501) |
Net sales (purchases) of short term investments | 238,048 |
Net (purchases) sales of other investments | 0 |
Net (purchases) sales of investments in other ventures | 0 |
Net (purchases) sales of other assets | 0 |
Dividends and return of capital from subsidiaries | 0 |
Contributions to subsidiaries | 0 |
Due (from) to subsidiary | (52) |
Net purchase of Platinum | (1,537) |
Net cash (used in) provided by investing activities | 11,119 |
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 |
Dividends paid – preference shares | 0 |
RenaissanceRe common share repurchases | 0 |
Net issuance (repayment) of debt | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 |
Net cash provided by (used in) financing activities | 0 |
Effect of exchange rate changes on foreign currency cash | 0 |
Net decrease in cash and cash equivalents | 1,089 |
Cash and cash equivalents, beginning of period | 0 |
Cash and cash equivalents, end of period | 1,089 |
RenaissanceRe Finance, Inc. |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | (119,583) |
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 0 |
Purchases of fixed maturity investments trading | 0 |
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 |
Net purchases of equity investments trading | 0 |
Net sales (purchases) of short term investments | 0 |
Net (purchases) sales of other investments | 0 |
Net (purchases) sales of investments in other ventures | 0 |
Net (purchases) sales of other assets | 0 |
Dividends and return of capital from subsidiaries | 0 |
Contributions to subsidiaries | 180,000 |
Due (from) to subsidiary | 407 |
Net purchase of Platinum | 0 |
Net cash (used in) provided by investing activities | (179,593) |
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 |
Dividends paid – preference shares | 0 |
RenaissanceRe common share repurchases | 0 |
Net issuance (repayment) of debt | 299,400 |
Net third party redeemable noncontrolling interest share transactions | 0 |
Net cash provided by (used in) financing activities | 299,400 |
Effect of exchange rate changes on foreign currency cash | 0 |
Net decrease in cash and cash equivalents | 224 |
Cash and cash equivalents, beginning of period | 0 |
Cash and cash equivalents, end of period | 224 |
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries) |  |
Cash flows (used in) provided by operating activities: |  |
Net cash (used in) provided by operating activities | 40,849 | 196,624
Cash flows (used in) provided by investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 4,695,154 | 4,009,909
Purchases of fixed maturity investments trading | (4,500,891) | (3,890,603)
Proceeds from sales and maturities of fixed maturity investments available for sale | 5,000 | 5,114
Net purchases of equity investments trading | 73,329 | (10,776)
Net sales (purchases) of short term investments | 129,050 | (26,894)
Net (purchases) sales of other investments | (1,250) | 68,684
Net (purchases) sales of investments in other ventures | (45) | 1,030
Net (purchases) sales of other assets | 4,500 | 6,000
Dividends and return of capital from subsidiaries | (979,161) | (365,297)
Contributions to subsidiaries | (375,020) | (49,170)
Due (from) to subsidiary | 25,176 | (3,346)
Net purchase of Platinum | (162,324) |
Net cash (used in) provided by investing activities | (11,794) | (157,009)
Cash flows provided by (used in) financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
RenaissanceRe common share repurchases | 0 | 0
Net issuance (repayment) of debt | 29,189 |
Net third party redeemable noncontrolling interest share transactions | (187,064) | (144,096)
Net cash provided by (used in) financing activities | (157,875) | (144,096)
Effect of exchange rate changes on foreign currency cash | (6,830) | (2,676)
Net decrease in cash and cash equivalents | (135,650) | (107,157)
Cash and cash equivalents, beginning of period | 518,565 | 395,209
Cash and cash equivalents, end of period | $ 382,915 | $ 288,052

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- Definition The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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