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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, 2020 | Mar. 31, 2019
Cash flows (used in) provided by operating activities |  |
Net cash provided by (used in) operating activities | $ 475,466 | $ 377,149
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 3,661,294 | 4,600,808
Purchases of fixed maturity investments trading | (3,370,394) | (3,519,277)
Net purchases of equity investments trading | (44,514) | (4,601)
Net purchases of short term investments | (704,226) | (1,374,632)
Net purchases of other investments | (79,711) | (51,811)
Net purchases of investments in other ventures | (1,888) | (1,573)
Return of investment from investment in other ventures | 9,157 | 11,250
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | 0
Due to (from) subsidiary | 0 | 0
Net purchase of TMR | 0 | (276,206)
Net cash used in investing activities | (530,282) | (616,042)
Cash flows (used in) provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | (15,359) | (14,469)
Dividends paid – preference shares | (9,056) | (9,189)
RenaissanceRe common share repurchases | (62,621) | 0
Redemption of 6.08% Series C preference shares | (125,000) | 0
Repayment of debt | (250,000) | 0
Drawdown of RenaissanceRe Revolving Credit Facility | 0 | 200,000
Net third party redeemable noncontrolling interest share transactions | 42,599 | (16,847)
Taxes paid on withholding shares | (10,180) | (6,957)
Net cash (used in) provided by financing activities | (429,617) | 152,538
Effect of exchange rate changes on foreign currency cash | 1,581 | (292)
Net decrease in cash and cash equivalents | (482,852) | (86,647)
Cash and cash equivalents, beginning of period | 1,379,068 | 1,107,922
Cash and cash equivalents, end of period | 896,216 | 1,021,275
Reportable Legal Entities | RenaissanceRe Finance Inc. (Subsidiary Issuer) |  |
Cash flows (used in) provided by operating activities |  |
Net cash provided by (used in) operating activities | (21,068) | (21,202)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 2,493 | 29,861
Purchases of fixed maturity investments trading | (17,602) | (14,098)
Net purchases of equity investments trading | 0 | 0
Net purchases of short term investments | 278,258 | (4,946)
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 | 0
Dividends and return of capital from subsidiaries | 0 | 0
Contributions to subsidiaries | 0 | 0
Due to (from) subsidiary | 15,277 | 6,629
Net purchase of TMR |  | 0
Net cash used in investing activities | 278,426 | 17,446
Cash flows (used in) provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
RenaissanceRe common share repurchases | 0 |
Redemption of 6.08% Series C preference shares | 0 |
Repayment of debt | (250,000) |
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 (used in) provided by financing activities | (250,000) | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | 7,358 | (3,756)
Cash and cash equivalents, beginning of period | 8,731 | 9,604
Cash and cash equivalents, end of period | 16,089 | 5,848
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |
Cash flows (used in) provided by operating activities |  |
Net cash provided by (used in) operating activities | 6,839 | (317,296)
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 0 | 277,030
Purchases of fixed maturity investments trading | 0 | (35,909)
Net purchases of equity investments trading | 0 | 0
Net purchases of short term investments | (85,628) | (54,622)
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 | 0
Dividends and return of capital from subsidiaries | 216,243 | 487,264
Contributions to subsidiaries | (64,952) | (528,416)
Due to (from) subsidiary | 126,320 | 2,100
Net purchase of TMR |  | 0
Net cash used in investing activities | 191,983 | 147,447
Cash flows (used in) provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | (15,359) | (14,469)
Dividends paid – preference shares | (9,056) | (9,189)
RenaissanceRe common share repurchases | (62,621) |
Redemption of 6.08% Series C preference shares | (125,000) |
Repayment of debt | 0 |
Drawdown of RenaissanceRe Revolving Credit Facility |  | 200,000
Net third party redeemable noncontrolling interest share transactions | 0 | 0
Taxes paid on withholding shares | (10,180) | (6,957)
Net cash (used in) provided by financing activities | (222,216) | 169,385
Effect of exchange rate changes on foreign currency cash | 0 | 0
Net decrease in cash and cash equivalents | (23,394) | (464)
Cash and cash equivalents, beginning of period | 26,460 | 3,534
Cash and cash equivalents, end of period | 3,066 | 3,070
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 | 489,695 | 715,647
Cash flows used in investing activities |  |
Proceeds from sales and maturities of fixed maturity investments trading | 3,658,801 | 4,293,917
Purchases of fixed maturity investments trading | (3,352,792) | (3,469,270)
Net purchases of equity investments trading | (44,514) | (4,601)
Net purchases of short term investments | (896,856) | (1,315,064)
Net purchases of other investments | (79,711) | (51,811)
Net purchases of investments in other ventures | (1,888) | (1,573)
Return of investment from investment in other ventures | 9,157 | 11,250
Dividends and return of capital from subsidiaries | (216,243) | (487,264)
Contributions to subsidiaries | 64,952 | 528,416
Due to (from) subsidiary | (141,597) | (8,729)
Net purchase of TMR |  | (276,206)
Net cash used in investing activities | (1,000,691) | (780,935)
Cash flows (used in) provided by financing activities |  |
Dividends paid – RenaissanceRe common shares | 0 | 0
Dividends paid – preference shares | 0 | 0
RenaissanceRe common share repurchases | 0 |
Redemption of 6.08% Series C preference shares | 0 |
Repayment of debt | 0 |
Drawdown of RenaissanceRe Revolving Credit Facility |  | 0
Net third party redeemable noncontrolling interest share transactions | 42,599 | (16,847)
Taxes paid on withholding shares | 0 | 0
Net cash (used in) provided by financing activities | 42,599 | (16,847)
Effect of exchange rate changes on foreign currency cash | 1,581 | (292)
Net decrease in cash and cash equivalents | (466,816) | (82,427)
Cash and cash equivalents, beginning of period | 1,343,877 | 1,094,784
Cash and cash equivalents, end of period | $ 877,061 | $ 1,012,357

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