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v2.4.1.9

Variable Interest Entities (Details) (USD $) | 3 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Nov. 13, 2014 | Jan. 31, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Variable Interest Entity [Line Items] |  |  |  |  |  |
Assets | $ 11,287,198,000 us-gaap_Assets |  |  |  |  | $ 8,203,550,000 us-gaap_Assets
Liabilities | 5,536,478,000 us-gaap_Liabilities |  |  |  |  | 3,206,127,000 us-gaap_Liabilities
Other liabilities | 231,968,000 us-gaap_OtherLiabilities |  |  |  |  | 374,108,000 us-gaap_OtherLiabilities
Gross premiums written | 643,578,000 us-gaap_PremiumsWrittenGross | 705,260,000 us-gaap_PremiumsWrittenGross |  |  |  |
Ceded premiums earned | 108,744,000 us-gaap_CededPremiumsEarned | 113,293,000 us-gaap_CededPremiumsEarned |  |  |  |
RenaissanceRe Upsilon Fund Ltd | Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Percent of segregated funds owned by third party investors |  |  | 100.00%rnr_VariableInterestEntityNonredeemableNonvotingSharesSegregatedFundsOwnedbyThirdParties / dei_LegalEntityAxis = rnr_RenaissanceReUpsilonFundLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember |  |  |
Upsilon RFO | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage | 24.30%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 38.90%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | 23.90%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |
Increase (decrease) in funds held under insurance agreements |  | 15,000,000 rnr_IncreaseDecreaseInFundsHeldUnderInsuranceAgreements / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | 5,000,000 rnr_IncreaseDecreaseInFundsHeldUnderInsuranceAgreements / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |
Risk participation percentage |  | 33.60%rnr_VariableInterestEntityQualitativeOrQuantitativeInformationRiskParticipationPercentage / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | 15.00%rnr_VariableInterestEntityQualitativeOrQuantitativeInformationRiskParticipationPercentage / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Return of Capital | 352,800,000 rnr_ConsolidationLessthanWhollyOwnedSubsidiaryParentOwnershipInterestChangesReturnofCapital / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | 317,500,000 rnr_ConsolidationLessthanWhollyOwnedSubsidiaryParentOwnershipInterestChangesReturnofCapital / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |
Assets | 343,600,000 us-gaap_Assets / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |  | 621,300,000 us-gaap_Assets / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Liabilities | 343,600,000 us-gaap_Liabilities / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |  | 621,300,000 us-gaap_Liabilities / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Other liabilities | 10,000,000 us-gaap_OtherLiabilities / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |  | 135,700,000 us-gaap_OtherLiabilities / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Mona Lisa Re Ltd | Renaissance Reinsurance |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Gross premiums written | 100,000 us-gaap_PremiumsWrittenGross / us-gaap_CounterpartyNameAxis = rnr_RenaissanceReinsuranceMember / dei_LegalEntityAxis = rnr_MonaLisaReMember | 0 us-gaap_PremiumsWrittenGross / us-gaap_CounterpartyNameAxis = rnr_RenaissanceReinsuranceMember / dei_LegalEntityAxis = rnr_MonaLisaReMember |  |  |  |
Ceded premiums earned | 1,900,000 us-gaap_CededPremiumsEarned / us-gaap_CounterpartyNameAxis = rnr_RenaissanceReinsuranceMember / dei_LegalEntityAxis = rnr_MonaLisaReMember | 2,400,000 us-gaap_CededPremiumsEarned / us-gaap_CounterpartyNameAxis = rnr_RenaissanceReinsuranceMember / dei_LegalEntityAxis = rnr_MonaLisaReMember |  |  |  |
Mona Lisa Re Ltd | DaVinciRe |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Gross premiums written | 100,000 us-gaap_PremiumsWrittenGross / us-gaap_CounterpartyNameAxis = rnr_DavincireMember / dei_LegalEntityAxis = rnr_MonaLisaReMember | 0 us-gaap_PremiumsWrittenGross / us-gaap_CounterpartyNameAxis = rnr_DavincireMember / dei_LegalEntityAxis = rnr_MonaLisaReMember |  |  |  |
Ceded premiums earned | 1,300,000 us-gaap_CededPremiumsEarned / us-gaap_CounterpartyNameAxis = rnr_DavincireMember / dei_LegalEntityAxis = rnr_MonaLisaReMember | 1,700,000 us-gaap_CededPremiumsEarned / us-gaap_CounterpartyNameAxis = rnr_DavincireMember / dei_LegalEntityAxis = rnr_MonaLisaReMember |  |  |  |
Mona Lisa Re Ltd | Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Assets | 181,100,000 us-gaap_Assets / dei_LegalEntityAxis = rnr_MonaLisaReMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember |  |  |  |  | 184,000,000 us-gaap_Assets / dei_LegalEntityAxis = rnr_MonaLisaReMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Liabilities | 181,100,000 us-gaap_Liabilities / dei_LegalEntityAxis = rnr_MonaLisaReMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember |  |  |  |  | 184,000,000 us-gaap_Liabilities / dei_LegalEntityAxis = rnr_MonaLisaReMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Non-Voting Preference Shares | Upsilon RFO | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Issuance of equity to third party investors | 128,700,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 172,400,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | 43,100,000 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |
Contributions to subsidiaries | $ 41,300,000 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | $ 109,700,000 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  | $ 13,500,000 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates / dei_LegalEntityAxis = rnr_UpsilonRFOMember / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28200181&loc=SL6759159-111685 + Details
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