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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 | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Cash flows (used in) provided by operating activities |  |
Net cash (used in) provided by operating activities | $ 377,149 | $ (37,349)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 4,600,808 | 2,318,859
Purchases of fixed maturity investments trading | (3,519,277) | (2,312,461)
Net purchases of equity investments trading | (4,601) | 137
Net purchases of short term investments | (1,374,632) | (594,641)
Net purchases of other investments | (51,811) | (98,639)
Net purchases of investments in other ventures | (1,573) | (17,974)
Return of investment from investment in other ventures | 11,250 | 0
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | 0
Due (from) to subsidiary | 0 | 0
Net purchase of the TMR Group Entities | (276,206) | 0
Net cash used in investing activities | (616,042) | (704,719)
Cash flows provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | (14,469) | (13,224)
Dividends paid – preference shares | (9,189) | (5,595)
Drawdown of RenaissanceRe Revolving Credit Facility | 200,000 | 0
Net third party redeemable noncontrolling interest share transactions | (16,847) | 52,759
Taxes paid on withholding shares | (6,957) | (7,034)
Net cash provided by financing activities | 152,538 | 26,906
Effect of exchange rate changes on foreign currency cash | (292) | 1,543
Net decrease in cash and cash equivalents | (86,647) | (713,619)
Cash and cash equivalents, beginning of period | 1,107,922 | 1,361,592
Cash and cash equivalents, end of period | 1,021,275 | 647,973
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer) |  |
Cash flows (used in) provided by operating activities |  |
Net cash (used in) provided by operating activities | 2,198 | 659
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 15,655 | 42,793
Purchases of fixed maturity investments trading | (9,899) | (22,956)
Net purchases of equity investments trading | (2,046) | (21)
Net purchases of short term investments | (5,386) | (4,024)
Net purchases of other investments | 0 | 0
Net purchases of investments in other ventures | 0 | 0
Return of investment from investment in other ventures | 0 |
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | (16,500)
Due (from) to subsidiary | (185) | 7
Net purchase of the TMR Group Entities | 0 |
Net cash used in investing activities | (1,861) | (701)
Cash flows provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
Drawdown of RenaissanceRe Revolving Credit Facility | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Taxes paid on withholding shares | 0 | 0
Net cash provided by financing activities | 0 | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | 337 | (42)
Cash and cash equivalents, beginning of period | 3,350 | 139
Cash and cash equivalents, end of period | 3,687 | 97
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer) |  |
Cash flows (used in) provided by operating activities |  |
Net cash (used in) provided by operating activities | (21,202) | (23,449)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 29,861 | 27,672
Purchases of fixed maturity investments trading | (14,098) | (12,698)
Net purchases of equity investments trading | 0 | 0
Net purchases of short term investments | (4,946) | (5,925)
Net purchases of other investments | 0 | 0
Net purchases of investments in other ventures | 0 | 0
Return of investment from investment in other ventures | 0 |
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | 0
Due (from) to subsidiary | 6,629 | 14,106
Net purchase of the TMR Group Entities | 0 |
Net cash used in investing activities | 17,446 | 23,155
Cash flows provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
Drawdown of RenaissanceRe Revolving Credit Facility | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Taxes paid on withholding shares | 0 | 0
Net cash provided by financing activities | 0 | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | (3,756) | (294)
Cash and cash equivalents, beginning of period | 9,604 | 1,469
Cash and cash equivalents, end of period | 5,848 | 1,175
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |
Cash flows (used in) provided by operating activities |  |
Net cash (used in) provided by operating activities | (317,296) | (6,875)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 277,030 | 119,542
Purchases of fixed maturity investments trading | (35,909) | (20,216)
Net purchases of equity investments trading | 0 | 0
Net purchases of short term investments | (54,622) | 54,728
Net purchases of other investments | 0 | 0
Net purchases of investments in other ventures | 0 | 0
Return of investment from investment in other ventures | 0 |
Dividends and return of capital from subsidiaries | 487,264 | 177,250
Contributions to subsidiaries | (528,416) | (150,205)
Due (from) to subsidiary | 2,100 | (154,877)
Net purchase of the TMR Group Entities | 0 |
Net cash used in investing activities | 147,447 | 26,222
Cash flows provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | (14,469) | (13,224)
Dividends paid – preference shares | (9,189) | (5,595)
Drawdown of RenaissanceRe Revolving Credit Facility | 200,000 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Taxes paid on withholding shares | (6,957) | (7,034)
Net cash provided by financing activities | 169,385 | (25,853)
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | (464) | (6,506)
Cash and cash equivalents, beginning of period | 3,534 | 14,656
Cash and cash equivalents, end of period | 3,070 | 8,150
Reportable Legal Entities | 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 | 713,449 | (7,684)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 4,278,262 | 2,128,852
Purchases of fixed maturity investments trading | (3,459,371) | (2,256,591)
Net purchases of equity investments trading | (2,555) | 158
Net purchases of short term investments | (1,309,678) | (639,420)
Net purchases of other investments | (51,811) | (98,639)
Net purchases of investments in other ventures | (1,573) | (17,974)
Return of investment from investment in other ventures | 11,250 |
Dividends and return of capital from subsidiaries | (487,264) | (177,250)
Contributions to subsidiaries | 528,416 | 166,705
Due (from) to subsidiary | (8,544) | 140,764
Net purchase of the TMR Group Entities | (276,206) |
Net cash used in investing activities | (779,074) | (753,395)
Cash flows provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
Drawdown of RenaissanceRe Revolving Credit Facility | 0 |
Net third party redeemable noncontrolling interest share transactions | (16,847) | 52,759
Taxes paid on withholding shares | 0 | 0
Net cash provided by financing activities | (16,847) | 52,759
Effect of exchange rate changes on foreign currency cash | (292) | 1,543
Net decrease in cash and cash equivalents | (82,764) | (706,777)
Cash and cash equivalents, beginning of period | 1,091,434 | 1,345,328
Cash and cash equivalents, end of period | $ 1,008,670 | $ 638,551

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