XML 42 R86.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Reserve for Claims and Claim Expenses (Liability for Catastrophe Claims) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | $ (143,798)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | $ (143,954)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | $ (157,969)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (92,366)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (111,496)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (124,215)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Attritional Claims and Claim Expenses |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (51,432)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember | (32,458)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember | (33,754)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember
Reported Claims Less than Expected |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (51,432)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember | (22,300)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember | (20,640)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember
Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (10,158)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember | (13,114)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember
Large Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (65,537)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (94,527)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (76,390)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Storm Sandy (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (24,232)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (48,285)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |
April and May U.S. Tornadoes 2011 | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (13,939)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_AprilandMayU.S.Tornadoes2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
Thailand Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (11,754)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  | (9,433)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
LIBOR (2011 and 2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (11,750)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LIBOR2011and2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
Chile Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (24,575)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ChileanEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Hurricanes Gustav and Ike (2008) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,647)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (16,665)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (20,467)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
U.K. Floods (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (17,271)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedKingdomFloods2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Hurricanes Katrina, Rita and Wilma (2005) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (7,730)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesKatrinaRitaAndWilma2005Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Tohoku Earthquake and Tsunami (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (5,131)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (19,033)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (3,896)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Hurricane Irene (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (4,506)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  | (7,130)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
New Zealand Earthquake (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (10,944)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | 17,912 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Windstorm Kyrill (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (3,615)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (8,244)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (3,417)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Subprime (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 5,049 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_Subprime2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
Hurricane Isaac (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 2,610 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIsaac2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |
New Zealand Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 24,692 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | 11,340 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | 3,570 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (13,704)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (5,306)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (3,953)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Small Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (26,829)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (16,969)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (47,825)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
European Floods (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (7,552)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_EuropeanFloods2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
U.S. PCS 24 Wind and Thunderstorm (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,712)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS24WindandThunderstorm2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
U.S. PCS 83 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (3,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS83WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |
U.S. PCS 76 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (300)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS76WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |
U.S. PCS 70 and 73 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 13,362 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS73WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |  |
U.S. PCS 70 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 8,225 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS70WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember |
Danish Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (5,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_DanishFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
U.S. PCS 63 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (5,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs63WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
U.S. PCS 42 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (2,560)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs42WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
U.S. PCS 53 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (2,558)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs53WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (25,927)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (21,394)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember | (32,707)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember
Catastrophe Reinsurance |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior 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
Catastrophe Reinsurance | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (65,511)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (102,037)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (110,568)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Attritional Claims and Claim Expenses |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Reported Claims Less than Expected |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Large Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (47,506)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (85,068)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (62,743)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Storm Sandy (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (20,104)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (44,460)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |
Catastrophe Reinsurance | April and May U.S. Tornadoes 2011 | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (13,939)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_AprilandMayU.S.Tornadoes2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | Thailand Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (9,254)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  | (3,933)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | LIBOR (2011 and 2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LIBOR2011and2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | Chile Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (24,575)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ChileanEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Hurricanes Gustav and Ike (2008) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,647)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (16,261)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (17,541)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | U.K. Floods (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (17,271)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedKingdomFloods2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Hurricanes Katrina, Rita and Wilma (2005) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (6,420)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesKatrinaRitaAndWilma2005Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Tohoku Earthquake and Tsunami (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (3,489)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (18,033)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (3,896)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Hurricane Irene (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (4,506)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  | (4,630)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | New Zealand Earthquake (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (10,944)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 17,912 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Windstorm Kyrill (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (3,615)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (8,244)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (3,417)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Subprime (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_Subprime2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | Hurricane Isaac (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 2,610 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIsaac2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |
Catastrophe Reinsurance | New Zealand Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 24,692 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 11,040 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | 3,570 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (10,644)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (776)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (2,542)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Small Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (18,005)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (16,969)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (47,825)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | European Floods (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (7,552)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_EuropeanFloods2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | U.S. PCS 24 Wind and Thunderstorm (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,712)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS24WindandThunderstorm2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | U.S. PCS 83 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (3,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS83WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |
Catastrophe Reinsurance | U.S. PCS 76 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (300)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS76WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |
Catastrophe Reinsurance | U.S. PCS 70 and 73 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 13,362 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS73WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |  |
Catastrophe Reinsurance | U.S. PCS 70 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 8,225 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS70WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember |
Catastrophe Reinsurance | Danish Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (5,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_DanishFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | U.S. PCS 63 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (5,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs63WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | U.S. PCS 42 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (2,560)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs42WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | U.S. PCS 53 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (2,558)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs53WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Catastrophe Reinsurance | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (17,103)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (21,394)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember | (32,707)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceSegmentMember
Specialty Reinsurance |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior 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
Specialty Reinsurance | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (11,419)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (2,463)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (3,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Attritional Claims and Claim Expenses |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (44,490)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (31,648)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (31,146)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Reported Claims Less than Expected |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (44,490)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (21,216)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (16,747)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | (10,432)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (14,399)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Large Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (11,419)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (2,463)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (3,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Storm Sandy (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |
Specialty Reinsurance | April and May U.S. Tornadoes 2011 | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_AprilandMayU.S.Tornadoes2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | Thailand Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (2,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | LIBOR (2011 and 2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (10,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LIBOR2011and2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | Chile Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ChileanEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Hurricanes Gustav and Ike (2008) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | U.K. Floods (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedKingdomFloods2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Hurricanes Katrina, Rita and Wilma (2005) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (3,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesKatrinaRitaAndWilma2005Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Tohoku Earthquake and Tsunami (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (1,642)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (1,000)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Hurricane Irene (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | New Zealand Earthquake (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Windstorm Kyrill (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Subprime (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 5,049 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_Subprime2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | Hurricane Isaac (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIsaac2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |
Specialty Reinsurance | New Zealand Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 300 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (1,826)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | (1,763)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Small Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | European Floods (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_EuropeanFloods2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | U.S. PCS 24 Wind and Thunderstorm (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS24WindandThunderstorm2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | U.S. PCS 83 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS83WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |
Specialty Reinsurance | U.S. PCS 76 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS76WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |
Specialty Reinsurance | U.S. PCS 70 and 73 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS73WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |  |
Specialty Reinsurance | U.S. PCS 70 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS70WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember |
Specialty Reinsurance | Danish Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_DanishFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | U.S. PCS 63 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs63WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | U.S. PCS 42 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs42WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | U.S. PCS 53 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs53WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Specialty Reinsurance | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_SpecialtyReinsuranceSegmentMember
Lloyd's |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior 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
Lloyd's | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (9,299)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (5,267)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (9,476)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Attritional Claims and Claim Expenses |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,942)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (2,989)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (6,726)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Reported Claims Less than Expected |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,942)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (3,263)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (8,011)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 274 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 1,285 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Large Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,612)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (5,267)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (9,476)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Storm Sandy (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (4,128)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (3,825)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |
Lloyd's | April and May U.S. Tornadoes 2011 | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_AprilandMayU.S.Tornadoes2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | Thailand Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  | (5,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | LIBOR (2011 and 2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (1,250)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LIBOR2011and2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | Chile Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ChileanEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Hurricanes Gustav and Ike (2008) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | U.K. Floods (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedKingdomFloods2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Hurricanes Katrina, Rita and Wilma (2005) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesKatrinaRitaAndWilma2005Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Tohoku Earthquake and Tsunami (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Hurricane Irene (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  | (2,500)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | New Zealand Earthquake (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Windstorm Kyrill (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Subprime (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_Subprime2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | Hurricane Isaac (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIsaac2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |
Lloyd's | New Zealand Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (1,234)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (1,442)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | (1,476)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Other | Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | (1,300)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Small Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (2,687)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | European Floods (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_EuropeanFloods2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | U.S. PCS 24 Wind and Thunderstorm (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS24WindandThunderstorm2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | U.S. PCS 83 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS83WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |
Lloyd's | U.S. PCS 76 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS76WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |
Lloyd's | U.S. PCS 70 and 73 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS73WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |  |
Lloyd's | U.S. PCS 70 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS70WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember |
Lloyd's | Danish Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_DanishFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | U.S. PCS 63 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs63WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | U.S. PCS 42 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs42WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | U.S. PCS 53 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs53WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Lloyd's | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (2,687)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = rnr_LloydsSegmentMember
Other |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior 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
Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,137)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,729)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,171)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Attritional Claims and Claim Expenses |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,179 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 4,118 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_AttritionalClaimsAndClaimExpensesMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Reported Claims Less than Expected |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2,179 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 4,118 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ReportedClaimsLessThanExpectedMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Actuarial Assumption Changes |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = rnr_ChangeInActuarialAssumptionMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Large Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,729)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,171)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LargeCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Storm Sandy (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_StormSandy2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Other | April and May U.S. Tornadoes 2011 | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_AprilandMayU.S.Tornadoes2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | Thailand Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ThailandFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | LIBOR (2011 and 2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_LIBOR2011and2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | Chile Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_ChileanEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Hurricanes Gustav and Ike (2008) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (404)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (2,926)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesGustavAndIke2008Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | U.K. Floods (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedKingdomFloods2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Hurricanes Katrina, Rita and Wilma (2005) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 1,690 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricanesKatrinaRitaAndWilma2005Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Tohoku Earthquake and Tsunami (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_TohokuEarthquakeAndTsunami2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Hurricane Irene (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIrene2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | New Zealand Earthquake (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Windstorm Kyrill (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_WindstormKyrill2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Subprime (2007) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_Subprime2007Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | Hurricane Isaac (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_HurricaneIsaac2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Other | New Zealand Earthquake (2010) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_NewZealandEarthquake2010Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (1,325)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 65 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherLargeCatastropheEventsMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Small Catastrophe Event | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | (6,137)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_SmallCatastropheEventMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | European Floods (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_EuropeanFloods2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | U.S. PCS 24 Wind and Thunderstorm (2013) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS24WindandThunderstorm2013Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | U.S. PCS 83 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS83WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Other | U.S. PCS 76 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS76WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Other | U.S. PCS 70 and 73 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS73WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |
Other | U.S. PCS 70 Wind and Thunderstorm (2012) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPCS70WindandThunderstorm2012Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Other | Danish Floods (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_DanishFloods2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | U.S. PCS 63 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs63WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | U.S. PCS 42 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs42WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | U.S. PCS 53 Winter Storm (2011) | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years |  |  | 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_UnitedStatesPcs53WinterStorm2011Member / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Other | Other | Catastrophe |  |  |
Liability for Catastrophe Claims [Line Items] |  |  |
Prior years | $ (6,137)us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 0 us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense / us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis = rnr_OtherSmallCatastropheMember / rnr_NetClaimsAndClaimsExpenseByExpenseAxis = us-gaap_CatastropheMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 18 -Article 12 + Details
Name: | us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | rnr_NetClaimsAndClaimsExpenseByExpenseAxis=rnr_AttritionalClaimsAndClaimExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rnr_NetClaimsAndClaimsExpenseByExpenseAxis=rnr_ChangeInActuarialAssumptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rnr_NetClaimsAndClaimsExpenseByExpenseAxis=rnr_ReportedClaimsLessThanExpectedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rnr_NetClaimsAndClaimsExpenseByExpenseAxis=us-gaap_CatastropheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_AprilandMayU.S.Tornadoes2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_ChileanEarthquake2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_DanishFloods2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_EuropeanFloods2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_HurricaneIrene2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_HurricaneIsaac2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_HurricanesGustavAndIke2008Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_HurricanesKatrinaRitaAndWilma2005Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_LargeCatastropheEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_LIBOR2011and2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_NewZealandEarthquake2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_NewZealandEarthquake2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_OtherLargeCatastropheEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_OtherSmallCatastropheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_SmallCatastropheEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_StormSandy2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_Subprime2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_ThailandFloods2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_TohokuEarthquakeAndTsunami2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedKingdomFloods2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPCS24WindandThunderstorm2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPcs42WinterStorm2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPcs53WinterStorm2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPcs63WinterStorm2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPCS70WindandThunderstorm2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPCS73WindandThunderstorm2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPCS76WindandThunderstorm2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_UnitedStatesPCS83WindandThunderstorm2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=rnr_WindstormKyrill2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rnr_CatastropheReinsuranceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rnr_LloydsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=rnr_SpecialtyReinsuranceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |