XML 157 R101.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Segment Reporting (Schedule Of Significant Components Of The Company's Revenues And Expenses) (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
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written | $ 132,780 us-gaap_PremiumsWrittenGross | $ 200,992 us-gaap_PremiumsWrittenGross | $ 511,540 us-gaap_PremiumsWrittenGross | $ 705,260 us-gaap_PremiumsWrittenGross | $ 84,122 us-gaap_PremiumsWrittenGross | $ 182,649 us-gaap_PremiumsWrittenGross | $ 703,223 us-gaap_PremiumsWrittenGross | $ 635,418 us-gaap_PremiumsWrittenGross | $ 1,550,572 us-gaap_PremiumsWrittenGross | $ 1,605,412 us-gaap_PremiumsWrittenGross | $ 1,551,591 us-gaap_PremiumsWrittenGross
Net premiums written | 111,769 us-gaap_PremiumsWrittenNet | 159,713 us-gaap_PremiumsWrittenNet | 346,407 us-gaap_PremiumsWrittenNet | 450,347 us-gaap_PremiumsWrittenNet | 80,784 us-gaap_PremiumsWrittenNet | 127,241 us-gaap_PremiumsWrittenNet | 559,109 us-gaap_PremiumsWrittenNet | 436,813 us-gaap_PremiumsWrittenNet | 1,068,236 us-gaap_PremiumsWrittenNet | 1,203,947 us-gaap_PremiumsWrittenNet | 1,102,657 us-gaap_PremiumsWrittenNet
Net premiums earned | 256,487 us-gaap_PremiumsEarnedNet | 258,979 us-gaap_PremiumsEarnedNet | 260,416 us-gaap_PremiumsEarnedNet | 286,534 us-gaap_PremiumsEarnedNet | 256,765 us-gaap_PremiumsEarnedNet | 294,717 us-gaap_PremiumsEarnedNet | 291,889 us-gaap_PremiumsEarnedNet | 271,255 us-gaap_PremiumsEarnedNet | 1,062,416 us-gaap_PremiumsEarnedNet | 1,114,626 us-gaap_PremiumsEarnedNet | 1,069,355 us-gaap_PremiumsEarnedNet
Net claims and claim expenses incurred | (12,003)us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 69,647 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 81,388 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 58,915 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | (20,854)us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 60,928 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 103,962 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 27,251 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 197,947 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 171,287 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet | 325,211 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
Acquisition expenses | 39,749 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 37,550 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 33,477 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 33,700 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 31,026 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 37,699 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 31,767 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 25,009 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 144,476 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 125,501 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense | 113,542 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
Operational expenses | 55,202 us-gaap_OperatingExpenses | 46,972 us-gaap_OperatingExpenses | 45,841 us-gaap_OperatingExpenses | 42,624 us-gaap_OperatingExpenses | 57,658 us-gaap_OperatingExpenses | 44,672 us-gaap_OperatingExpenses | 42,789 us-gaap_OperatingExpenses | 45,986 us-gaap_OperatingExpenses | 190,639 us-gaap_OperatingExpenses | 191,105 us-gaap_OperatingExpenses | 179,151 us-gaap_OperatingExpenses
Underwriting income (loss) |  |  |  |  |  |  |  |  | 529,354 rnr_UnderwritingIncomeLossNet | 626,733 rnr_UnderwritingIncomeLossNet | 451,451 rnr_UnderwritingIncomeLossNet
Net investment income | 25,886 us-gaap_NetInvestmentIncome | 24,941 us-gaap_NetInvestmentIncome | 34,541 us-gaap_NetInvestmentIncome | 38,948 us-gaap_NetInvestmentIncome | 78,732 us-gaap_NetInvestmentIncome | 59,931 us-gaap_NetInvestmentIncome | 26,163 us-gaap_NetInvestmentIncome | 43,202 us-gaap_NetInvestmentIncome | 124,316 us-gaap_NetInvestmentIncome | 208,028 us-gaap_NetInvestmentIncome | 165,725 us-gaap_NetInvestmentIncome
Net foreign exchange gains | (107)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 5,036 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 2,392 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | (1,061)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 1,747 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 488 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | (932)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 614 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 6,260 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 1,917 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 5,319 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Equity in earnings of other ventures | 4,838 us-gaap_IncomeLossFromEquityMethodInvestments | 9,806 us-gaap_IncomeLossFromEquityMethodInvestments | 7,232 us-gaap_IncomeLossFromEquityMethodInvestments | 4,199 us-gaap_IncomeLossFromEquityMethodInvestments | 6,274 us-gaap_IncomeLossFromEquityMethodInvestments | 7,313 us-gaap_IncomeLossFromEquityMethodInvestments | 3,772 us-gaap_IncomeLossFromEquityMethodInvestments | 5,835 us-gaap_IncomeLossFromEquityMethodInvestments | 26,075 us-gaap_IncomeLossFromEquityMethodInvestments | 23,194 us-gaap_IncomeLossFromEquityMethodInvestments | 23,238 us-gaap_IncomeLossFromEquityMethodInvestments
Other loss | 1,219 us-gaap_OtherOperatingIncomeExpenseNet | (1,169)us-gaap_OtherOperatingIncomeExpenseNet | (535)us-gaap_OtherOperatingIncomeExpenseNet | 62 us-gaap_OtherOperatingIncomeExpenseNet | (173)us-gaap_OtherOperatingIncomeExpenseNet | 651 us-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 | 30,475 us-gaap_GainLossOnInvestments | (31,097)us-gaap_GainLossOnInvestments | 27,128 us-gaap_GainLossOnInvestments | 14,927 us-gaap_GainLossOnInvestments | 61,864 us-gaap_GainLossOnInvestments | 28,472 us-gaap_GainLossOnInvestments | (69,529)us-gaap_GainLossOnInvestments | 14,269 us-gaap_GainLossOnInvestments | 41,433 us-gaap_GainLossOnInvestments | 35,076 us-gaap_GainLossOnInvestments | 163,121 us-gaap_GainLossOnInvestments
Net other-than-temporary impairments recognized in earnings |  |  |  |  |  |  |  |  | 0 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities | 0 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities | (343)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
Corporate expenses | (10,583)us-gaap_GeneralAndAdministrativeExpense | (3,905)us-gaap_GeneralAndAdministrativeExpense | (3,954)us-gaap_GeneralAndAdministrativeExpense | (4,545)us-gaap_GeneralAndAdministrativeExpense | (3,304)us-gaap_GeneralAndAdministrativeExpense | (4,307)us-gaap_GeneralAndAdministrativeExpense | (21,529)us-gaap_GeneralAndAdministrativeExpense | (4,482)us-gaap_GeneralAndAdministrativeExpense | (22,987)us-gaap_GeneralAndAdministrativeExpense | (33,622)us-gaap_GeneralAndAdministrativeExpense | (16,456)us-gaap_GeneralAndAdministrativeExpense
Interest expense | (4,289)us-gaap_InterestExpense | (4,290)us-gaap_InterestExpense | (4,292)us-gaap_InterestExpense | (4,293)us-gaap_InterestExpense | (4,297)us-gaap_InterestExpense | (4,298)us-gaap_InterestExpense | (4,300)us-gaap_InterestExpense | (5,034)us-gaap_InterestExpense | (17,164)us-gaap_InterestExpense | (17,929)us-gaap_InterestExpense | (23,097)us-gaap_InterestExpense
Income from continuing operations before taxes | 220,978 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 104,132 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 162,222 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 199,532 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 329,778 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 239,668 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 45,888 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 225,704 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 686,864 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 841,038 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 766,838 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax (expense) benefit | (401)us-gaap_IncomeTaxExpenseBenefit | (245)us-gaap_IncomeTaxExpenseBenefit | 204 us-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 (loss) from discontinued operations | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (9,779)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 2,427 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 9,774 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 2,422 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (16,476)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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
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 | 170,767 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 67,815 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 120,752 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 151,003 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 268,656 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 179,740 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 26,806 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 190,474 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 510,337 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 665,676 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 566,014 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net claims and claim expenses incurred - current accident year |  |  |  |  |  |  |  |  | 341,745 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense | 315,241 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense | 483,180 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense
Net claims and claim expenses incurred – prior accident years |  |  |  |  |  |  |  |  | (143,798)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | (143,954)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | (157,969)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Total net incurred |  |  |  |  |  |  |  |  | 197,947 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 | 171,287 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 | 325,211 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1
Net claims and claim expense ratio - current accident year |  |  |  |  |  |  |  |  | 32.20%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear | 28.30%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear | 45.20%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear
Net claims and claim expense ratio - prior accident years |  |  |  |  |  |  |  |  | (13.60%)rnr_NetClaimsAndClaimExpenseRatioPriorYears | (12.90%)rnr_NetClaimsAndClaimExpenseRatioPriorYears | (14.80%)rnr_NetClaimsAndClaimExpenseRatioPriorYears
Net claims and claim expense ratio - calendar year |  |  |  |  |  |  |  |  | 18.60%us-gaap_LossRatio | 15.40%us-gaap_LossRatio | 30.40%us-gaap_LossRatio
Underwriting expense ratio |  |  |  |  |  |  |  |  | 31.60%us-gaap_UnderwritingExpenseRatio | 28.40%us-gaap_UnderwritingExpenseRatio | 27.40%us-gaap_UnderwritingExpenseRatio
Combined ratio |  |  |  |  |  |  |  |  | 50.20%us-gaap_CombinedRatio | 43.80%us-gaap_CombinedRatio | 57.80%us-gaap_CombinedRatio
Catastrophe Reinsurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | 933,969 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 1,120,379 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 1,182,207 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net premiums written |  |  |  |  |  |  |  |  | 541,608 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 753,078 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 766,035 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net premiums earned |  |  |  |  |  |  |  |  | 590,845 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 723,705 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 781,738 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expenses incurred |  |  |  |  |  |  |  |  | 1,757 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 7,908 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 165,209 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Acquisition expenses |  |  |  |  |  |  |  |  | 43,161 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 49,161 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 66,665 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Operational expenses |  |  |  |  |  |  |  |  | 95,851 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 108,130 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 103,811 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Underwriting income (loss) |  |  |  |  |  |  |  |  | 450,076 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 558,506 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 446,053 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expenses incurred - current accident year |  |  |  |  |  |  |  |  | 67,268 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 109,945 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 275,777 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expenses incurred – prior accident years |  |  |  |  |  |  |  |  | (65,511)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (102,037)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (110,568)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Total net incurred |  |  |  |  |  |  |  |  | 1,757 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 7,908 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 165,209 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expense ratio - current accident year |  |  |  |  |  |  |  |  | 11.40%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 15.20%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 35.30%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expense ratio - prior accident years |  |  |  |  |  |  |  |  | (11.10%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (14.10%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (14.20%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Net claims and claim expense ratio - calendar year |  |  |  |  |  |  |  |  | 0.30%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 1.10%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 21.10%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Underwriting expense ratio |  |  |  |  |  |  |  |  | 23.50%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 21.70%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 21.80%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Combined ratio |  |  |  |  |  |  |  |  | 23.80%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 22.80%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 42.90%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Specialty Reinsurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | 346,638 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 259,489 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 209,887 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net premiums written |  |  |  |  |  |  |  |  | 295,855 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 248,562 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 201,552 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net premiums earned |  |  |  |  |  |  |  |  | 253,537 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 214,306 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 164,685 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expenses incurred |  |  |  |  |  |  |  |  | 88,502 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 67,236 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 76,813 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Acquisition expenses |  |  |  |  |  |  |  |  | 60,936 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 41,538 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 23,826 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Operational expenses |  |  |  |  |  |  |  |  | 43,370 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 31,780 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 29,124 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Underwriting income (loss) |  |  |  |  |  |  |  |  | 60,729 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 73,752 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 34,922 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expenses incurred - current accident year |  |  |  |  |  |  |  |  | 144,411 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 101,347 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 110,959 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expenses incurred – prior accident years |  |  |  |  |  |  |  |  | (55,909)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (34,111)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (34,146)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Total net incurred |  |  |  |  |  |  |  |  | 88,502 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 67,236 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 76,813 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expense ratio - current accident year |  |  |  |  |  |  |  |  | 57.00%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 47.30%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 67.40%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expense ratio - prior accident years |  |  |  |  |  |  |  |  | (22.10%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (15.90%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (20.80%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Net claims and claim expense ratio - calendar year |  |  |  |  |  |  |  |  | 34.90%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 31.40%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 46.60%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Underwriting expense ratio |  |  |  |  |  |  |  |  | 41.10%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 34.20%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 32.20%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Combined ratio |  |  |  |  |  |  |  |  | 76.00%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 65.60%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 78.80%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Lloyd's |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | 269,656 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 226,532 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 159,987 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net premiums written |  |  |  |  |  |  |  |  | 230,429 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 201,697 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 135,131 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net premiums earned |  |  |  |  |  |  |  |  | 217,666 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 176,029 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 122,968 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expenses incurred |  |  |  |  |  |  |  |  | 113,825 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 95,693 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 80,242 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Acquisition expenses |  |  |  |  |  |  |  |  | 46,927 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 34,823 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 22,864 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Operational expenses |  |  |  |  |  |  |  |  | 51,115 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 50,540 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 45,680 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Underwriting income (loss) |  |  |  |  |  |  |  |  | 5,799 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (5,027)rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (25,818)rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expenses incurred - current accident year |  |  |  |  |  |  |  |  | 130,066 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 103,949 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 96,444 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expenses incurred – prior accident years |  |  |  |  |  |  |  |  | (16,241)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (8,256)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (16,202)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Total net incurred |  |  |  |  |  |  |  |  | 113,825 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 95,693 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 80,242 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expense ratio - current accident year |  |  |  |  |  |  |  |  | 59.80%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 59.10%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 78.40%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expense ratio - prior accident years |  |  |  |  |  |  |  |  | (7.50%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (4.70%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (13.10%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Net claims and claim expense ratio - calendar year |  |  |  |  |  |  |  |  | 52.30%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 54.40%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 65.30%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Underwriting expense ratio |  |  |  |  |  |  |  |  | 45.00%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 48.50%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 55.70%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Combined ratio |  |  |  |  |  |  |  |  | 97.30%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 102.90%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 121.00%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | 309 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (988)us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (490)us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net premiums written |  |  |  |  |  |  |  |  | 344 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 610 us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (61)us-gaap_PremiumsWrittenNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net premiums earned |  |  |  |  |  |  |  |  | 368 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 586 us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (36)us-gaap_PremiumsEarnedNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expenses incurred |  |  |  |  |  |  |  |  | (6,137)us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 450 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,947 us-gaap_PolicyholderBenefitsAndClaimsIncurredNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Acquisition expenses |  |  |  |  |  |  |  |  | (6,548)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (21)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 187 us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Operational expenses |  |  |  |  |  |  |  |  | 303 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 655 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 536 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Underwriting income (loss) |  |  |  |  |  |  |  |  | 12,750 rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (498)rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (3,706)rnr_UnderwritingIncomeLossNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net investment income |  |  |  |  |  |  |  |  | 124,316 us-gaap_NetInvestmentIncome / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 208,028 us-gaap_NetInvestmentIncome / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 165,725 us-gaap_NetInvestmentIncome / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net foreign exchange gains |  |  |  |  |  |  |  |  | 6,260 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 1,917 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 5,319 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Equity in earnings of other ventures |  |  |  |  |  |  |  |  | 26,075 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 23,194 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 23,238 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other loss |  |  |  |  |  |  |  |  | (423)us-gaap_OtherOperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (2,359)us-gaap_OtherOperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (2,120)us-gaap_OtherOperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net realized and unrealized gains on investments |  |  |  |  |  |  |  |  | 41,433 us-gaap_GainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 35,076 us-gaap_GainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 163,121 us-gaap_GainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net other-than-temporary impairments recognized in earnings |  |  |  |  |  |  |  |  |  |  | (343)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Corporate expenses |  |  |  |  |  |  |  |  | (22,987)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (33,622)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (16,456)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Interest expense |  |  |  |  |  |  |  |  | (17,164)us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (17,929)us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (23,097)us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Income tax (expense) benefit |  |  |  |  |  |  |  |  | (608)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,692)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,413)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  | 2,422 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (16,476)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (153,538)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (151,144)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (148,040)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Dividends on preference shares |  |  |  |  |  |  |  |  | (22,381)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (24,948)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (34,895)us-gaap_DividendsPreferredStock / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expenses incurred - current accident year |  |  |  |  |  |  |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expenses incurred – prior accident years |  |  |  |  |  |  |  |  | (6,137)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 450 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,947 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Total net incurred |  |  |  |  |  |  |  |  | (6,137)us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 450 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,947 us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expense ratio - current accident year |  |  |  |  |  |  |  |  | 0.00%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0.00%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0.00%rnr_NetClaimsAndClaimsExpenseRatioCurrentYear / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expense ratio - prior accident years |  |  |  |  |  |  |  |  | (1667.70%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 76.80%rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (8186.10%)rnr_NetClaimsAndClaimExpenseRatioPriorYears / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Net claims and claim expense ratio - calendar year |  |  |  |  |  |  |  |  | (1667.70%)us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 76.80%us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (8186.10%)us-gaap_LossRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Underwriting expense ratio |  |  |  |  |  |  |  |  | (1697.00%)us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 108.20%us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (2008.30%)us-gaap_UnderwritingExpenseRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Combined ratio |  |  |  |  |  |  |  |  | (3364.70%)us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 185.00%us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (10194.40%)us-gaap_CombinedRatio / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  | $ 300 us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | $ (1,000)us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | $ (500)us-gaap_PremiumsWrittenGross / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember

X
- Definition Net claims and claim expense ratio - prior accident years is derived by dividing net claims and claim expenses - prior accident years by net premiums earned. + References No definition available. + Details
Name: | rnr_NetClaimsAndClaimExpenseRatioPriorYears
Namespace Prefix: | rnr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net claims and claim expense ratio - current accident year is derived by dividing net claims and claim expense - current accident year by net premiums earned. + References No definition available. + Details
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