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Condensed Consolidating Financial Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement Of Operations) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenues                      
Net premiums earned $ 256,487us-gaap_PremiumsEarnedNet $ 258,979us-gaap_PremiumsEarnedNet $ 260,416us-gaap_PremiumsEarnedNet $ 286,534us-gaap_PremiumsEarnedNet $ 256,765us-gaap_PremiumsEarnedNet $ 294,717us-gaap_PremiumsEarnedNet $ 291,889us-gaap_PremiumsEarnedNet $ 271,255us-gaap_PremiumsEarnedNet $ 1,062,416us-gaap_PremiumsEarnedNet $ 1,114,626us-gaap_PremiumsEarnedNet $ 1,069,355us-gaap_PremiumsEarnedNet
Net investment income 25,886us-gaap_NetInvestmentIncome 24,941us-gaap_NetInvestmentIncome 34,541us-gaap_NetInvestmentIncome 38,948us-gaap_NetInvestmentIncome 78,732us-gaap_NetInvestmentIncome 59,931us-gaap_NetInvestmentIncome 26,163us-gaap_NetInvestmentIncome 43,202us-gaap_NetInvestmentIncome 124,316us-gaap_NetInvestmentIncome 208,028us-gaap_NetInvestmentIncome 165,725us-gaap_NetInvestmentIncome
Net foreign exchange (losses) gains (107)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 5,036us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 2,392us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (1,061)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 1,747us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 488us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (932)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 614us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 6,260us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 1,917us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 5,319us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Equity in earnings of other ventures 4,838us-gaap_IncomeLossFromEquityMethodInvestments 9,806us-gaap_IncomeLossFromEquityMethodInvestments 7,232us-gaap_IncomeLossFromEquityMethodInvestments 4,199us-gaap_IncomeLossFromEquityMethodInvestments 6,274us-gaap_IncomeLossFromEquityMethodInvestments 7,313us-gaap_IncomeLossFromEquityMethodInvestments 3,772us-gaap_IncomeLossFromEquityMethodInvestments 5,835us-gaap_IncomeLossFromEquityMethodInvestments 26,075us-gaap_IncomeLossFromEquityMethodInvestments 23,194us-gaap_IncomeLossFromEquityMethodInvestments 23,238us-gaap_IncomeLossFromEquityMethodInvestments
Other loss 1,219us-gaap_OtherOperatingIncomeExpenseNet (1,169)us-gaap_OtherOperatingIncomeExpenseNet (535)us-gaap_OtherOperatingIncomeExpenseNet 62us-gaap_OtherOperatingIncomeExpenseNet (173)us-gaap_OtherOperatingIncomeExpenseNet 651us-gaap_OtherOperatingIncomeExpenseNet (1,128)us-gaap_OtherOperatingIncomeExpenseNet (1,709)us-gaap_OtherOperatingIncomeExpenseNet (423)us-gaap_OtherOperatingIncomeExpenseNet (2,359)us-gaap_OtherOperatingIncomeExpenseNet (2,120)us-gaap_OtherOperatingIncomeExpenseNet
Net realized and unrealized gains on investments 30,475us-gaap_GainLossOnInvestments (31,097)us-gaap_GainLossOnInvestments 27,128us-gaap_GainLossOnInvestments 14,927us-gaap_GainLossOnInvestments 61,864us-gaap_GainLossOnInvestments 28,472us-gaap_GainLossOnInvestments (69,529)us-gaap_GainLossOnInvestments 14,269us-gaap_GainLossOnInvestments 41,433us-gaap_GainLossOnInvestments 35,076us-gaap_GainLossOnInvestments 163,121us-gaap_GainLossOnInvestments
Net other-than-temporary impairments                 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities (343)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
Total revenues 318,798us-gaap_Revenues 266,496us-gaap_Revenues 331,174us-gaap_Revenues 343,609us-gaap_Revenues 405,209us-gaap_Revenues 391,572us-gaap_Revenues 250,235us-gaap_Revenues 333,466us-gaap_Revenues 1,260,077us-gaap_Revenues 1,380,482us-gaap_Revenues 1,424,295us-gaap_Revenues
Expenses                      
Net claims and claim expenses incurred (12,003)us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 69,647us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 81,388us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 58,915us-gaap_PolicyholderBenefitsAndClaimsIncurredNet (20,854)us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 60,928us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 103,962us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 27,251us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 197,947us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 171,287us-gaap_PolicyholderBenefitsAndClaimsIncurredNet 325,211us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
Acquisition expenses 39,749us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 37,550us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 33,477us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 33,700us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 31,026us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 37,699us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 31,767us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 25,009us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 144,476us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 125,501us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense 113,542us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
Operational expenses 55,202us-gaap_OperatingExpenses 46,972us-gaap_OperatingExpenses 45,841us-gaap_OperatingExpenses 42,624us-gaap_OperatingExpenses 57,658us-gaap_OperatingExpenses 44,672us-gaap_OperatingExpenses 42,789us-gaap_OperatingExpenses 45,986us-gaap_OperatingExpenses 190,639us-gaap_OperatingExpenses 191,105us-gaap_OperatingExpenses 179,151us-gaap_OperatingExpenses
Corporate expenses 10,583us-gaap_GeneralAndAdministrativeExpense 3,905us-gaap_GeneralAndAdministrativeExpense 3,954us-gaap_GeneralAndAdministrativeExpense 4,545us-gaap_GeneralAndAdministrativeExpense 3,304us-gaap_GeneralAndAdministrativeExpense 4,307us-gaap_GeneralAndAdministrativeExpense 21,529us-gaap_GeneralAndAdministrativeExpense 4,482us-gaap_GeneralAndAdministrativeExpense 22,987us-gaap_GeneralAndAdministrativeExpense 33,622us-gaap_GeneralAndAdministrativeExpense 16,456us-gaap_GeneralAndAdministrativeExpense
Interest expense 4,289us-gaap_InterestExpense 4,290us-gaap_InterestExpense 4,292us-gaap_InterestExpense 4,293us-gaap_InterestExpense 4,297us-gaap_InterestExpense 4,298us-gaap_InterestExpense 4,300us-gaap_InterestExpense 5,034us-gaap_InterestExpense 17,164us-gaap_InterestExpense 17,929us-gaap_InterestExpense 23,097us-gaap_InterestExpense
Total expenses 97,820us-gaap_BenefitsLossesAndExpenses 162,364us-gaap_BenefitsLossesAndExpenses 168,952us-gaap_BenefitsLossesAndExpenses 144,077us-gaap_BenefitsLossesAndExpenses 75,431us-gaap_BenefitsLossesAndExpenses 151,904us-gaap_BenefitsLossesAndExpenses 204,347us-gaap_BenefitsLossesAndExpenses 107,762us-gaap_BenefitsLossesAndExpenses 573,213us-gaap_BenefitsLossesAndExpenses 539,444us-gaap_BenefitsLossesAndExpenses 657,457us-gaap_BenefitsLossesAndExpenses
Income (loss) before equity in net income (loss) of subsidiaries and taxes                 686,864us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 841,038us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 766,838us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Equity in net income (loss) of subsidiaries                 0us-gaap_IncomeLossFromSubsidiariesNetOfTax 0us-gaap_IncomeLossFromSubsidiariesNetOfTax 0us-gaap_IncomeLossFromSubsidiariesNetOfTax
Income from continuing operations before taxes 220,978us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 104,132us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 162,222us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 199,532us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 329,778us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 239,668us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 45,888us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 225,704us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 686,864us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 841,038us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 766,838us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax (expense) benefit (401)us-gaap_IncomeTaxExpenseBenefit (245)us-gaap_IncomeTaxExpenseBenefit 204us-gaap_IncomeTaxExpenseBenefit (166)us-gaap_IncomeTaxExpenseBenefit (1,336)us-gaap_IncomeTaxExpenseBenefit (223)us-gaap_IncomeTaxExpenseBenefit (11)us-gaap_IncomeTaxExpenseBenefit (122)us-gaap_IncomeTaxExpenseBenefit (608)us-gaap_IncomeTaxExpenseBenefit (1,692)us-gaap_IncomeTaxExpenseBenefit (1,413)us-gaap_IncomeTaxExpenseBenefit
Income from continuing operations 220,577us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 103,887us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 162,426us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 199,366us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 328,442us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 239,445us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 45,877us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 225,582us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 686,256us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 839,346us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 765,425us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Income from discontinued operations 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax (9,779)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 2,427us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 9,774us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 2,422us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax (16,476)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Net income 220,577us-gaap_ProfitLoss 103,887us-gaap_ProfitLoss 162,426us-gaap_ProfitLoss 199,366us-gaap_ProfitLoss 328,442us-gaap_ProfitLoss 229,666us-gaap_ProfitLoss 48,304us-gaap_ProfitLoss 235,356us-gaap_ProfitLoss 686,256us-gaap_ProfitLoss 841,768us-gaap_ProfitLoss 748,949us-gaap_ProfitLoss
Net income attributable to noncontrolling interests (44,215)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (30,477)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (36,078)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (42,768)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (54,191)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (44,331)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (14,015)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (38,607)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (153,538)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (151,144)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (148,040)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net income attributable to RenaissanceRe 176,362us-gaap_NetIncomeLoss 73,410us-gaap_NetIncomeLoss 126,348us-gaap_NetIncomeLoss 156,598us-gaap_NetIncomeLoss 274,251us-gaap_NetIncomeLoss 185,335us-gaap_NetIncomeLoss 34,289us-gaap_NetIncomeLoss 196,749us-gaap_NetIncomeLoss 532,718us-gaap_NetIncomeLoss 690,624us-gaap_NetIncomeLoss 600,909us-gaap_NetIncomeLoss
Dividends on preference shares (5,595)us-gaap_DividendsPreferredStock (5,595)us-gaap_DividendsPreferredStock (5,596)us-gaap_DividendsPreferredStock (5,595)us-gaap_DividendsPreferredStock (5,595)us-gaap_DividendsPreferredStock (5,595)us-gaap_DividendsPreferredStock (7,483)us-gaap_DividendsPreferredStock (6,275)us-gaap_DividendsPreferredStock (22,381)us-gaap_DividendsPreferredStock (24,948)us-gaap_DividendsPreferredStock (34,895)us-gaap_DividendsPreferredStock
Net income available to RenaissanceRe common shareholders 170,767us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 67,815us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 120,752us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 151,003us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 268,656us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 179,740us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 26,806us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 190,474us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 510,337us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 665,676us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic 566,014us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
RenaissanceRe Holdings Ltd. (Parent Guarantor)                      
Revenues                      
Net premiums earned                 0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net investment income                 2,706us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
4,213us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,195us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net foreign exchange (losses) gains                 (13)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(7)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
33us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Equity in earnings of other ventures                 0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Other loss                 0us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
106us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,822us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net realized and unrealized gains on investments                 83us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(483)us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,862us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net other-than-temporary impairments                     0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total revenues                 2,776us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
3,829us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
31,912us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Expenses                      
Net claims and claim expenses incurred                 0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Acquisition expenses                 0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Operational expenses                 (4,890)us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(4,962)us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(5,103)us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Corporate expenses                 20,787us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
31,264us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,282us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Interest expense                 0us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
734us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
5,875us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total expenses                 15,897us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
27,036us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
15,054us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income (loss) before equity in net income (loss) of subsidiaries and taxes                 (13,121)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(23,207)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
16,858us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Equity in net income (loss) of subsidiaries                 545,839us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
713,831us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
584,051us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income from continuing operations before taxes                 532,718us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
690,624us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
600,909us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income tax (expense) benefit                 0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income from continuing operations                   690,624us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
600,909us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income from discontinued operations                   0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income                 532,718us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
690,624us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
600,909us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income attributable to noncontrolling interests                 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income attributable to RenaissanceRe                 532,718us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
690,624us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
600,909us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Dividends on preference shares                 (22,381)us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(24,948)us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(34,895)us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income available to RenaissanceRe common shareholders                 510,337us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
665,676us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
566,014us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
RenRe North America Holdings Inc. (Subsidiary Issuer)                      
Revenues                      
Net premiums earned                 0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net investment income                 1,765us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
488us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
619us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net foreign exchange (losses) gains                 0us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(2)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Equity in earnings of other ventures                 0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Other loss                 (7)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
125us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net realized and unrealized gains on investments                 9,069us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
1,196us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
1,556us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net other-than-temporary impairments                     0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Total revenues                 10,827us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
1,807us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
2,175us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Expenses                      
Net claims and claim expenses incurred                 0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Acquisition expenses                 0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Operational expenses                 7,004us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
7,566us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
7,013us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Corporate expenses                 238us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
338us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
273us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Interest expense                 14,467us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
14,467us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
14,467us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Total expenses                 21,709us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
22,371us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
21,753us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Income (loss) before equity in net income (loss) of subsidiaries and taxes                 (10,882)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(20,564)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(19,578)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Equity in net income (loss) of subsidiaries                 (4,343)us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
2,142us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
1,860us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Income from continuing operations before taxes                 (15,225)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(18,422)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(17,718)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Income tax (expense) benefit                 4,064us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(1,558)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(499)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Income from continuing operations                   (19,980)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(18,217)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Income from discontinued operations                   2,422us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(16,476)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net income                 (11,161)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(17,558)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(34,693)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net income attributable to noncontrolling interests                 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net income attributable to RenaissanceRe                 (11,161)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(17,558)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(34,693)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Dividends on preference shares                 0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Net income available to RenaissanceRe common shareholders                 (11,161)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(17,558)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(34,693)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)                      
Revenues                      
Net premiums earned                 1,062,416us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,114,626us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,069,355us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net investment income                 123,582us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
209,105us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
150,911us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net foreign exchange (losses) gains                 6,273us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,926us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
5,286us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Equity in earnings of other ventures                 26,075us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
23,194us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
23,238us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Other loss                 (416)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(2,590)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(4,942)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net realized and unrealized gains on investments                 32,281us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
34,363us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
146,703us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net other-than-temporary impairments                     (343)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Total revenues                 1,250,211us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,380,624us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,390,208us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Expenses                      
Net claims and claim expenses incurred                 197,947us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
171,287us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
325,211us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Acquisition expenses                 144,476us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
125,501us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
113,542us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Operational expenses                 188,857us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
189,117us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
177,241us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Corporate expenses                 1,962us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,020us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
1,901us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Interest expense                 2,697us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,728us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,755us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Total expenses                 535,939us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
490,653us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
620,650us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income (loss) before equity in net income (loss) of subsidiaries and taxes                 714,272us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
889,971us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
769,558us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Equity in net income (loss) of subsidiaries                 0us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income from continuing operations before taxes                 714,272us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
889,971us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
769,558us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income tax (expense) benefit                 (4,672)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(134)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(914)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income from continuing operations                   889,837us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
768,644us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income from discontinued operations                   0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net income                 709,600us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
889,837us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
768,644us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net income attributable to noncontrolling interests                 (153,538)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(151,144)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(148,040)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net income attributable to RenaissanceRe                 556,062us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
738,693us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
620,604us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Dividends on preference shares                 0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net income available to RenaissanceRe common shareholders                 556,062us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
738,693us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
620,604us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Consolidating Adjustments                      
Revenues                      
Net premiums earned                 0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PremiumsEarnedNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net investment income                 (3,737)us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(5,778)us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetInvestmentIncome
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net foreign exchange (losses) gains                 0us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Equity in earnings of other ventures                 0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Other loss                 0us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net realized and unrealized gains on investments                 0us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_GainLossOnInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net other-than-temporary impairments                     0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Total revenues                 (3,737)us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(5,778)us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_Revenues
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Expenses                      
Net claims and claim expenses incurred                 0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Acquisition expenses                 0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Operational expenses                 (332)us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(616)us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_OperatingExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Corporate expenses                 0us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_GeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Interest expense                 0us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_InterestExpense
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Total expenses                 (332)us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(616)us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_BenefitsLossesAndExpenses
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Income (loss) before equity in net income (loss) of subsidiaries and taxes                 (3,405)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(5,162)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Equity in net income (loss) of subsidiaries                 (541,496)us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(715,973)us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(585,911)us-gaap_IncomeLossFromSubsidiariesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Income from continuing operations before taxes                 (544,901)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(721,135)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(585,911)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Income tax (expense) benefit                 0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Income from continuing operations                   (721,135)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(585,911)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Income from discontinued operations                   0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net income                 (544,901)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(721,135)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(585,911)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net income attributable to noncontrolling interests                 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net income attributable to RenaissanceRe                 (544,901)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(721,135)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(585,911)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Dividends on preference shares                 0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Net income available to RenaissanceRe common shareholders                 $ (544,901)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
$ (721,135)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
$ (585,911)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember