XML 139 R123.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Condensed Consolidating Financial Information Provided in Connection with Outstanding Debt of Subsidiaries (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities | $ 1,221,701 | $ 1,025,787 | $ 484,772
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 11,585,576 | 9,490,669 | 8,102,514
Purchases of fixed maturity investments trading | (12,489,972) | (10,093,532) | (8,282,720)
Proceeds from sales and maturities of fixed maturity investments available for sale | 0 | 0 | 17,692
Net (purchases) sales of equity investments trading | 14,156 | 115,837 | 184,788
Net sales (purchases) of short term investments | (1,436,389) | 364,011 | (118,617)
Net purchases of other investments | (199,475) | (19,419) | (68,589)
Net purchases of investments in other ventures | (21,473) | 0 | 0
Return of investment from investment in other ventures | 8,464 | 20,000 | 0
Net sales of other assets | 2,500 | 0 | 400
Dividends and return of capital from subsidiaries | 0 | 0 | 0
Contributions to subsidiaries | 0 | 0 | 0
Due to (from) subsidiaries | 0 | 0 | 0
Net cash used in investing activities | (2,536,613) | (122,434) | (164,532)
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | (52,841) | (51,370) | (51,583)
Dividends paid – preference shares | (30,088) | (22,381) | (22,381)
RenaissanceRe common share repurchases | 0 | (188,591) | (309,434)
RenaissanceRe common share issuance | 250,000 | 0 | 0
Issuance of preference shares, net of expenses | 241,448 | 0 |
Issuance of debt, net of expenses | 0 | 295,866 | 0
Repayment of debt | 0 | (250,000) | 0
Net third party redeemable noncontrolling interest share transactions | 665,683 | 260,475 | (2,990)
Taxes paid on withholding shares | (7,862) | (15,139) | (14,943)
Net cash provided by (used in) financing activities | 1,066,340 | 28,860 | (401,331)
Effect of exchange rate changes on foreign currency cash | (5,098) | 8,222 | (4,637)
Net (decrease) increase in cash and cash equivalents | (253,670) | 940,435 | (85,728)
Cash and cash equivalents, beginning of period | 1,361,592 | 421,157 | 506,885
Cash and cash equivalents, end of period | 1,107,922 | 1,361,592 | 421,157
RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |  |
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities | (9,659) | (4,109) | (3,509)
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 384,818 | 261,601 | 314,568
Purchases of fixed maturity investments trading | (520,935) | (344,463) | (336,345)
Net sales (purchases) of short term investments | 48,600 | 243,571 | (111,814)
Dividends and return of capital from subsidiaries | 672,098 | 478,496 | 617,239
Net cash used in investing activities | (402,120) | 289,179 | 398,732
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | (52,841) | (51,370) | (51,583)
Dividends paid – preference shares | (30,088) | (22,381) | (22,381)
RenaissanceRe common share repurchases | 0 | (188,591) | (309,434)
RenaissanceRe common share issuance | 250,000 | 0 | 0
Issuance of preference shares, net of expenses | 241,448 | 0 | 0
Taxes paid on withholding shares | (7,862) | (15,139) | (14,943)
Net cash provided by (used in) financing activities | 400,657 | (277,481) | (398,341)
Net (decrease) increase in cash and cash equivalents | (11,122) | 7,589 | (3,118)
Cash and cash equivalents, beginning of period | 14,656 | 7,067 | 10,185
Cash and cash equivalents, end of period | 3,534 | 14,656 | 7,067
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |  |
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities | (9,659) | (4,109) | (3,509)
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 384,818 | 261,601 | 314,568
Purchases of fixed maturity investments trading | (520,935) | (344,463) | (336,345)
Proceeds from sales and maturities of fixed maturity investments available for sale |  |  | 0
Net (purchases) sales of equity investments trading | 0 | 0 | 0
Net sales (purchases) of short term investments | 48,600 | 243,571 | (111,814)
Net purchases of other investments | 0 | 0 | 0
Net purchases of investments in other ventures | 0 |  |
Return of investment from investment in other ventures | 0 | 0 |
Net sales of other assets | 0 |  | 0
Dividends and return of capital from subsidiaries | 672,098 | 478,496 | 617,239
Contributions to subsidiaries | (785,785) | (669,672) | (108,674)
Due to (from) subsidiaries | (200,916) | 319,646 | 23,758
Net cash used in investing activities | (402,120) | 289,179 | 398,732
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | (52,841) | (51,370) | (51,583)
Dividends paid – preference shares | (30,088) | (22,381) | (22,381)
RenaissanceRe common share repurchases |  | (188,591) | (309,434)
RenaissanceRe common share issuance | 250,000 |  |
Issuance of preference shares, net of expenses | 241,448 |  |
Issuance of debt, net of expenses |  | 0 |
Repayment of debt |  | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0 | 0
Taxes paid on withholding shares | (7,862) | (15,139) | (14,943)
Net cash provided by (used in) financing activities | 400,657 | (277,481) | (398,341)
Effect of exchange rate changes on foreign currency cash | 0 | 0 | 0
Net (decrease) increase in cash and cash equivalents | (11,122) | 7,589 | (3,118)
Cash and cash equivalents, beginning of period | 14,656 | 7,067 | 10,185
Cash and cash equivalents, end of period | 3,534 | 14,656 | 7,067
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 operating activities | 1,162,400 | 1,388,311 | 535,912
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 11,046,968 | 8,550,179 | 7,572,923
Purchases of fixed maturity investments trading | (11,840,813) | (9,229,732) | (7,532,276)
Proceeds from sales and maturities of fixed maturity investments available for sale |  |  | 17,692
Net (purchases) sales of equity investments trading | 15,464 | 32,265 | (5,845)
Net sales (purchases) of short term investments | (1,485,040) | 79,520 | (41,586)
Net purchases of other investments | (199,475) | (19,419) | (68,589)
Net purchases of investments in other ventures | (21,473) |  |
Return of investment from investment in other ventures | 8,464 | 20,000 |
Net sales of other assets | 2,500 |  | 400
Dividends and return of capital from subsidiaries | (672,098) | (529,537) | (633,264)
Contributions to subsidiaries | 867,632 | 706,211 | 108,674
Due to (from) subsidiaries | 200,992 | (319,027) | (31,566)
Net cash used in investing activities | (2,076,879) | (709,540) | (613,437)
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | 0 | 0 | 0
Dividends paid – preference shares | 0 | 0 | 0
RenaissanceRe common share repurchases |  | 0 | 0
RenaissanceRe common share issuance | 0 |  |
Issuance of preference shares, net of expenses | 0 |  |
Issuance of debt, net of expenses |  | 0 |
Repayment of debt |  | 0 |
Net third party redeemable noncontrolling interest share transactions | 665,683 | 260,475 | (2,990)
Taxes paid on withholding shares | 0 | 0 | 0
Net cash provided by (used in) financing activities | 665,683 | 260,475 | (2,990)
Effect of exchange rate changes on foreign currency cash | (5,098) | 8,222 | (4,637)
Net (decrease) increase in cash and cash equivalents | (253,894) | 947,468 | (85,152)
Cash and cash equivalents, beginning of period | 1,345,328 | 397,860 | 483,012
Cash and cash equivalents, end of period | 1,091,434 | 1,345,328 | 397,860
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer) |  |  |
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities | 6,315 | (8,253) | 1,477
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 97,272 | 100,248 | 69,941
Purchases of fixed maturity investments trading | (72,292) | (99,568) | (123,046)
Proceeds from sales and maturities of fixed maturity investments available for sale |  |  | 0
Net (purchases) sales of equity investments trading | (1,308) | (1,752) | (2,389)
Net sales (purchases) of short term investments | (404) | 114 | 67,684
Net purchases of other investments | 0 | 0 | 0
Net purchases of investments in other ventures | 0 |  |
Return of investment from investment in other ventures | 0 | 0 |
Net sales of other assets | 0 |  | 0
Dividends and return of capital from subsidiaries | 0 | 9,175 | 2,900
Contributions to subsidiaries | (16,847) | 0 | 0
Due to (from) subsidiaries | (9,525) | 13 | (22,313)
Net cash used in investing activities | (3,104) | 8,230 | (7,223)
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | 0 | 0 | 0
Dividends paid – preference shares | 0 | 0 | 0
RenaissanceRe common share repurchases |  | 0 | 0
RenaissanceRe common share issuance | 0 |  |
Issuance of preference shares, net of expenses | 0 |  |
Issuance of debt, net of expenses |  | 0 |
Repayment of debt |  | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0 | 0
Taxes paid on withholding shares | 0 | 0 | 0
Net cash provided by (used in) financing activities | 0 | 0 | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0 | 0
Net (decrease) increase in cash and cash equivalents | 3,211 | (23) | (5,746)
Cash and cash equivalents, beginning of period | 139 | 162 | 5,908
Cash and cash equivalents, end of period | 3,350 | 139 | 162
Reportable Legal Entities | Platinum Underwriters Finance, Inc. (Subsidiary Issuer) |  |  |
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities |  | (2,272) | (14,501)
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading |  | 289,741 | 145,082
Purchases of fixed maturity investments trading |  | (143,991) | (291,053)
Proceeds from sales and maturities of fixed maturity investments available for sale |  |  | 0
Net (purchases) sales of equity investments trading |  | 85,324 | 193,022
Net sales (purchases) of short term investments |  | 41,299 | (32,901)
Net purchases of other investments |  | 0 | 0
Return of investment from investment in other ventures |  | 0 |
Net sales of other assets |  |  | 0
Dividends and return of capital from subsidiaries |  | 0 | 0
Contributions to subsidiaries |  | (26,649) | 0
Due to (from) subsidiaries |  | (123) | (81)
Net cash used in investing activities |  | 245,601 | 14,069
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 | 0
Issuance of debt, net of expenses |  | 0 |
Repayment of debt |  | (250,000) |
Net third party redeemable noncontrolling interest share transactions |  | 0 | 0
Taxes paid on withholding shares |  | 0 | 0
Net cash provided by (used in) financing activities |  | (250,000) | 0
Effect of exchange rate changes on foreign currency cash |  | 0 | 0
Net (decrease) increase in cash and cash equivalents |  | (6,671) | (432)
Cash and cash equivalents, beginning of period | 0 | 6,671 | 7,103
Cash and cash equivalents, end of period |  | 0 | 6,671
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer) |  |  |
Cash flows (used in) provided by operating activities |  |  |
Net cash provided by operating activities | 62,645 | (347,890) | (34,607)
Cash flows provided by (used in) investing activities |  |  |
Proceeds from sales and maturities of fixed maturity investments trading | 56,518 | 288,900 | 0
Purchases of fixed maturity investments trading | (55,932) | (275,778) | 0
Proceeds from sales and maturities of fixed maturity investments available for sale |  |  | 0
Net (purchases) sales of equity investments trading | 0 | 0 | 0
Net sales (purchases) of short term investments | 455 | (493) | 0
Net purchases of other investments | 0 | 0 | 0
Net purchases of investments in other ventures | 0 |  |
Return of investment from investment in other ventures | 0 | 0 |
Net sales of other assets | 0 |  | 0
Dividends and return of capital from subsidiaries | 0 | 41,866 | 13,125
Contributions to subsidiaries | (65,000) | (9,890) | 0
Due to (from) subsidiaries | 9,449 | (509) | 30,202
Net cash used in investing activities | (54,510) | 44,096 | 43,327
Cash flows (used in) provided by financing activities |  |  |
Dividends paid – RenaissanceRe common shares | 0 | 0 | 0
Dividends paid – preference shares | 0 | 0 | 0
RenaissanceRe common share repurchases |  | 0 | 0
RenaissanceRe common share issuance | 0 |  |
Issuance of preference shares, net of expenses | 0 |  |
Issuance of debt, net of expenses |  | 295,866 |
Repayment of debt |  | 0 |
Net third party redeemable noncontrolling interest share transactions | 0 | 0 | 0
Taxes paid on withholding shares | 0 | 0 | 0
Net cash provided by (used in) financing activities | 0 | 295,866 | 0
Effect of exchange rate changes on foreign currency cash | 0 | 0 | 0
Net (decrease) increase in cash and cash equivalents | 8,135 | (7,928) | 8,720
Cash and cash equivalents, beginning of period | 1,469 | 9,397 | 677
Cash and cash equivalents, end of period | $ 9,604 | $ 1,469 | $ 9,397

X
- Definition The net cash inflow (outflow) associated with the acquisition or disposal of other investments during the period. + References No definition available. + Details
Name: | rnr_PaymentsForProceedsFromOtherInvestments
Namespace Prefix: | rnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term investments with an original maturity that is one year or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. + References No definition available. + Details
Name: | rnr_PaymentsForProceedsFromOtherShortTermInvestments
Namespace Prefix: | rnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payments For (Proceeds From) Repurchase (Sale) Of Redeemable Noncontrolling Interest + References No definition available. + Details
Name: | rnr_PaymentsForProceedsFromRepurchaseSaleOfRedeemableNoncontrollingInterest
Namespace Prefix: | rnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 + Details
Name: | us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families; affiliates; or other parties with the ability to exert significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_IncreaseDecreaseInDueToRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net cash outflow or inflow associated with the acquisition or sale of a business segment during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
Name: | us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=107668666&loc=SL79513924-113897 + Details
Name: | us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to acquire securities classified as trading securities and held for investment purposes. Excludes payments for 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromContributionsFromAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21D -URI http://asc.fasb.org/extlink&oid=109223946&loc=SL94080555-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from sales and purchases of trading securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_ProceedsFromPaymentsForTradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3151-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562 + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition 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
Name: | us-gaap_ProceedsFromSaleAndMaturityOfTradingSecuritiesHeldforinvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=srt_ReportableLegalEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_NonGuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=rnr_SubsidiaryIssuerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=rnr_SubsidiaryIssuerTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=rnr_SubsidiaryIssuerThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |