CINF


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:AwardType, us-gaap:DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensation
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:PremiumsEarnedNet
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:NetInvestmentIncome
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RealizedInvestmentGainsLosses
us-gaap:InvestmentType

us-gaap:OtherIncome
us-gaap:ConsolidationItems

us-gaap:PolicyholderBenefitsAndClaimsIncurredNet
us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense
us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:Restatement, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebt
us-gaap:DebtInstrument

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:Restatement, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:TreasuryStockValue
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:Restatement, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensation

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:BusinessAcquisition

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:RetirementPlanType
cinf:DefinedBenefitPlanNonServiceCostBenefit

cinf:EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesAmount

cinf:EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesPercent

cinf:FixedMaturityInvestmentsPercentageOfAmortizedCosts
us-gaap:StatementEquityComponents
cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents
cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossTax

cinf:IncreaseDecreaseinPremiumsandReinsurancereceivable

cinf:InvestmentIncomeOtherLongTermInvestments

cinf:OtherComprehensiveIncomeChangeInLifeDeferredAcquisitionCostsLifePolicyReservesAndOtherTax

cinf:OtherComprehensiveIncomeChangeInLifeDeferredAcquistionCostsLifePolicyReservesAndOtherNetOfTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentBeforeTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentBeforeTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax
us-gaap:StatementEquityComponents
cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentTax

cinf:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialLossAndPriorServiceCostArisingDuringPeriodTax
us-gaap:InvestmentType
cinf:OtherRealizedInvestmentGainsLossesNet
us-gaap:InvestmentType
cinf:OtherThanTemporaryImpairmentLosses

cinf:PurchaseOfTreasurySharesNonCash
us-gaap:StatementEquityComponents
cinf:ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax
us-gaap:StatementEquityComponents
cinf:SharesAcquiredDuringPeriodValueEmployeeShareBasedCompensationPlans

cinf:UnderwritingAcquisitionAndInsuranceExpenses

us-gaap:AdditionsToContractHoldersFunds
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:StatementBusinessSegments
us-gaap:AssumedPremiumsEarned
us-gaap:StatementBusinessSegments
us-gaap:AssumedPremiumsWritten
us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesGrossRealizedGains
us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses

us-gaap:BenefitsLossesAndExpenses

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:StatementBusinessSegments
us-gaap:CededPremiumsEarned
us-gaap:StatementBusinessSegments
us-gaap:CededPremiumsWritten

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CurrentIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseOther
us-gaap:StatementBusinessSegments

us-gaap:DeferredPolicyAcquisitionCostsAdditions
us-gaap:StatementBusinessSegments
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanOtherCosts
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:StatementBusinessSegments
us-gaap:DirectPremiumsEarned
us-gaap:StatementBusinessSegments
us-gaap:DirectPremiumsWritten
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStockCash

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:GainLossOnInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:GainLossOnSaleOfInvestments
us-gaap:InvestmentType

us-gaap:GrossInvestmentIncomeOperating

us-gaap:IncomeTaxReconciliationDeductionsDividends

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncomeTaxesPaidNet

us-gaap:IncreaseDecreaseInAccruedInvestmentIncomeReceivable

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredPolicyAcquisitionCosts

us-gaap:IncreaseDecreaseInFuturePolicyBenefitReserves

us-gaap:IncreaseDecreaseInInsuranceAssets

us-gaap:IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
us-gaap:StatementBusinessSegments
us-gaap:IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities

us-gaap:IncreaseDecreaseInUnearnedPremiums
us-gaap:AwardType
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InsuranceCommissionsAndFees
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestCreditedToPolicyOwnerAccount

us-gaap:InterestPaidNet

us-gaap:InvestmentIncomeDividend

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInvestmentExpense

us-gaap:LiabilitiesAssumed1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:PaymentsForLossesAndLossAdjustmentExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesEquity

us-gaap:PaymentsToAcquireFinanceReceivables
us-gaap:StatementBusinessSegments
us-gaap:PolicyholderBenefitsAndClaimsIncurredGross
us-gaap:StatementBusinessSegments
us-gaap:PremiumsEarnedNetLife
us-gaap:StatementBusinessSegments
us-gaap:PremiumsEarnedNetPropertyAndCasualty

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfNotesPayable

us-gaap:ProceedsFromSaleAndCollectionOfFinanceReceivables

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity

us-gaap:ProceedsFromStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementBusinessSegments
us-gaap:ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed
us-gaap:StatementBusinessSegments
us-gaap:ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityOther

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:InvestmentType
us-gaap:UnrealizedGainLossOnInvestments

us-gaap:WithdrawalFromContractHoldersFunds
us-gaap:Restatement, us-gaap:StatementEquityComponents
cinf:AccumulatedOtherComprehensiveIncomeLossTax
us-gaap:StatementEquityComponents

cinf:AvailableForSaleSecuritiesEquitySecuritiesCost
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument, us-gaap:InvestmentType
cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss3
us-gaap:InvestmentType

cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossAccumulatedinInvestments
us-gaap:FinancialInstrument, us-gaap:InvestmentType
cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss3
us-gaap:InvestmentType
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:NewAccountingPronouncementEarlyAdoption, us-gaap:StatementEquityComponents
cinf:CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax

cinf:DeferredTaxLiabilitiesPolicyLiabilitiesLife

cinf:DeferredTaxLiabilitiesUnrealizedGainsAndLossesOnInvestments

cinf:ExcessofSeparateAccountFairValueoverAccountValue

cinf:IncreasetoallowancethroughretainedearningsforASU201613aftertax
us-gaap:StatementEquityComponents

cinf:NumberOfCreditFacilities
us-gaap:InvestmentType
cinf:NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths
us-gaap:InvestmentType
cinf:NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonthsandBelow70PercentofAmortizedCost

cinf:NumberOfSecuritiesOtherThanTemporaryImpairmentLosses
us-gaap:MajorCustomers
cinf:PercentageOfPremiums
us-gaap:MajorCustomers, us-gaap:Range
us-gaap:Range, us-gaap:StatementGeographical
us-gaap:StatementGeographical

cinf:PercentageOfReservesForAsbestosAndEnvironmentalClaims

cinf:ReinsuranceRecoverable
us-gaap:AwardType, us-gaap:DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensation
cinf:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValueAggregate

srt:LifeInsuranceInForceCeded

srt:LifeInsuranceInForceGross

srt:LifeInsuranceInForceNet
us-gaap:RetirementPlanType
us-gaap:AccruedEmployeeBenefitsCurrentAndNoncurrent

us-gaap:AccruedInvestmentIncomeReceivable
us-gaap:ConsolidatedEntities
us-gaap:Restatement, us-gaap:StatementEquityComponents
us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:ConsolidatedEntities

us-gaap:AssetsHeldByInsuranceRegulators

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:InvestmentType

us-gaap:AvailableForSaleEquitySecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecurities
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesAmortizedCost
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesEquitySecurities
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:NewAccountingPronouncementEarlyAdoption, us-gaap:StatementEquityComponents
us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption

us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:ConsolidatedEntities

us-gaap:DeferredPolicyAcquisitionCosts
us-gaap:StatementBusinessSegments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInvestments

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountOfEmployerAndRelatedPartySecuritiesIncludedInPlanAssets

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:InvestmentType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:InvestmentType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:EquitySecuritiesByIndustry, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:ConsolidatedEntities
us-gaap:DividendsPayableCurrentAndNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:DueFromAffiliates
us-gaap:ConsolidatedEntities
us-gaap:EquityMethodInvestments

us-gaap:Investments
us-gaap:ConsolidatedEntities

us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilitiesRelatedToInvestmentContractsFairValueDisclosure
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsNet

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability
us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts

us-gaap:LiabilityForFuturePolicyBenefitsLife
us-gaap:EquitySecuritiesByIndustry
us-gaap:ProductOrService, us-gaap:EquitySecuritiesByIndustry

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LoansAndLeasesReceivableNetReportedAmount
us-gaap:InvestmentType

us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:DebtInstrument
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:NotesPayable

us-gaap:NotesPayableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:NumberOfStatesInWhichEntityOperates

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:OtherInvestmentNotReadilyMarketableFairValue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:RetirementPlanName

us-gaap:OtherInvestments
us-gaap:ConsolidatedEntities
us-gaap:InvestmentType

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities

us-gaap:PremiumsReceivableAtCarryingValue

us-gaap:PrepaidReinsurancePremiums
us-gaap:ConsolidatedEntities
us-gaap:PrepaidTaxes

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceRecoverables

us-gaap:SecuritiesHeldAsCollateralAtFairValue

us-gaap:SeparateAccountAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:SeparateAccountsLiability
us-gaap:AwardType, cinf:ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAward
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, cinf:ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAward
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:ProductOrService, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments

us-gaap:ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ProductOrService, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsNumberOfReportedClaims
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
dei:LegalEntity
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount
us-gaap:ConsolidatedEntities, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:InvestmentType

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost
us-gaap:ConsolidatedEntities, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:InvestmentType
us-gaap:ConsolidatedEntities, us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType, dei:LegalEntity
us-gaap:InvestmentType

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDeferredPolicyAcquisitionCosts
us-gaap:StatementBusinessSegments

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense
us-gaap:StatementBusinessSegments

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts
cinf:SegmentReportingInformationBySecondarySegment
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves
cinf:SegmentReportingInformationBySecondarySegment
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationOtherPolicyClaimsAndBenefitsPayable
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationUnearnedPremiums
cinf:SegmentReportingInformationBySecondarySegment
us-gaap:StatementBusinessSegments

us-gaap:TreasuryStockShares

us-gaap:UnearnedPremiums

us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ValuationAllowancesAndReservesType

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:CommonStockValue ██████████████████████████▆▆▄▃▃▁▁▁▁▁▁▁▁▁397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393NA393NANA
 us-gaap:SharesIssued us-gaap:AwardType,us-gaap:DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensation us-gaap:PerformanceShares,us-gaap:RestrictedStockUnitsRSUNA20549.0NANANA80666.0NANANA87228.0NANANA25461.0NANANA103586.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesIssued ████████████████████████████▄▄▄▄▁▁▁▁▁▁▁▄198198198198198198198198198198198198198198198198198198198198198198198198198198198198197197197197196196196196196196196197NA196NANA
us-gaap:CommonStockSharesOutstanding ████████████████████████████▁▁▁▁198198198198198198198198198198198198198198198198198198198198198198198198198198198198197197197197NA196NANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▁▄▆▆▆▄▄▄█▆█▆█████▆▆██▆▆█▆▆██▆▆▆▄▄▄▄▆▆▆▆▆▆▄▄▄160162163163163162162162164163164163164164164164164163163164164163163164163163164164163163163162162162162163163163163163163162162162
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 162NA165165164NA164164164NA165166166NA166166166NA165165165NA165165165NA165165164NA163163163NA163163163NANANANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 162NA163163163NA162163164NA164164164NA164164164NA164164164NA163163163NA163163163NA162162162NA162163162NANANANANANANA
us-gaap:EarningsPerShareBasic ▁█▆▇█▄▇▆▅█▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▆▆▅-7.563.841.512.624.27-2.783.41.33-0.193.920.620.611.220.611.090.751.140.951.061.070.781.031.120.510.560.750.80.670.951.180.690.20.530.820.12-0.30.380.77999999999999980.950.170.421.51000000000000021.05-0.12
us-gaap:EarningsPerShareDiluted ▁█▆▇█▄█▆▅█▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▆▆▅-7.563.791.492.594.22-2.783.381.32-0.193.880.610.61.210.61.080.741.130.941.051.060.771.021.110.510.550.740.790.660.941.170.680.20.530.820.12-0.30.380.780.950.170.421.51.05-0.12
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:Revenues ▁█▇▇█▄▇▆▅▆▆▆▆▅▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▅▄▄▅▄▄-99215217001913215971019151558122414111412138615231312140213711364126312781316128512621280121411891172115211041103107010351020986955944975929936107187888711331007874
 us-gaap:Revenues us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▆▆█▆▄▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁919011981524036313028342723161512111212NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cinf:ExcessandSurplusLinesInsurance█▇▆▅▄▃▃▂▂▂▁▁797673676461605856565353NA474945NA444243NA394234NANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:LifeInsuranceSegment▇▇█▇▇▇▆▇▆▆▅▆▅▄▆▆▅▄▄▄▄▄▃▄▃▇▁676871686766626561605761595460605954535354534754506639NANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine██▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▂▁▁▁864854835824811813806812792798793797782781780772761762758746734731721715693681681NANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine███▇▇▇▇▆▆▆▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▁▁360359355349345343339333326321315308302298294289284281278272269266264259254249244NANANANANANANANANANANANANANANANANA
us-gaap:PremiumsEarnedNet ███▇▆▆▅▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁1456144114461384133313181298129412601258124712411208119211911173115411481127111110941086107110591027NA992954931NA889877839827812773782783784768746753766770
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine██▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▂▁▁▁863852834823810811805812790796792796781779779771760761757745733730720714692680680NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine███▇▇▇▇▆▆▆▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁359358354348344342338331325320314307300297293288283280277272268266263258254249244NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:Subsegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine,cinf:CommercialAutoSegment185NA179175170NA168166161NA159158155NA151147144NA141139136NA133132126NA124NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:Subsegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine,cinf:CommercialCasualtySegment289NA277277268NA268272265NA268271265NA265263257NA257252244NA237234224NA221NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:Subsegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine,cinf:CommercialPropertySegment249NA241234234NA229231228NA225226223NA217215214NA205203196NA186180171NA161NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:Subsegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine,cinf:HomeOwnerSegment159NA154149147NA142139136NA131128125NA122121119NA117114114NA110111109NA103NANANANANANANANANANANANANANANANANA
 us-gaap:PremiumsEarnedNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:Subsegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine,cinf:PersonalAuto154NA156155155NA155153151NA148144141NA137135131NA128125123NA121117116NA112NANANANANANANANANANANANANANANANANA
us-gaap:NetInvestmentIncome ▇█▇▆▆▇▅▅▄▅▅▄▄▅▄▄▃▄▃▂▂▂▂▁▁165168161160157161154154150156153151149153148149145150143140139140138136135NA133131128NA132132131132130132131130128130130131127119
 us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:InvestmentsSegment▇█▇▆▆▇▅▅▄▆▅▅▄▅▄▄▃▄▃▂▂▂▂▂▁▂▁165168161160157161154154150156153151149153148149145150143140139140138136135137133NANANANANANANANANANANANANANANANANA
us-gaap:RealizedInvestmentGainsLosses ▁█▆▇█▄▇▆▅▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▆-172553786364663-774458105-191-87-11160-37564461-403604732651422NA221441NA10613-7-2671219155-238246110-18
 us-gaap:RealizedInvestmentGainsLosses us-gaap:InvestmentType us-gaap:DebtSecurities▁██-751-1NA2-21NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherIncome ▆▆█▆▆▃▆▃▃▃▆▃▃▁▆▆▃▆▃▆▆▃█▆▆2232212111211022121221322NA322NA33223230432043
 us-gaap:OtherIncome us-gaap:ConsolidationItems us-gaap:CorporateNonSegment2NA322NA211NA211NA221NA12NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PolicyholderBenefitsAndClaimsIncurredNet █▆▇▇▅▅▅▅▅▄▅▅▅▄▃▄▂▁▁▂▃▁▁▃▂1003910932936860874879883854809874854853809753821724677670712749675686763732NA642631568NA571687582492656801575494575595516505498658
 us-gaap:PolicyholderBenefitsAndClaimsIncurredNet us-gaap:StatementBusinessSegments srt:ConsolidatedPropertyAndCasualtyInsuranceEntity█▃▅▅▁▁▂▃930835864863790798813821NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense █████████████▁███▁███265267270251246245231236234233237229214-1511222214212-1449207204209NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense us-gaap:StatementBusinessSegments srt:ConsolidatedPropertyAndCasualtyInsuranceEntity███▄▃▃▁▁256257257239233233225225NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▁▁█▁▁▁█▁▁█▁▁▁█▁▁▁▁█▁▁▁▁▁█13131413131314131314131313141313131314131313131314NA131413NA1413141413141314131314131414
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▁█▆▇█▄▇▆▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▇▆▅-1576781294530867-581618264-501971291282761282531662652162432481742362591071191671821482172731522911218611-97761742212185355244-50
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems us-gaap:CorporateNonSegment-2NA-4-1-11NA-15-7-11NA-46-12-11NA-8-17-13NA-16-14NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cinf:ExcessandSurplusLinesInsurance▃▄▄▆▄▅▆▄▆▄▄▇▆▇▇▁▆█▅▄▁▃▄▁▁▃▁9131217111517131811131918202051722141148135494NANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:LifeInsuranceSegment▅▃▆▃▃▁▅█▅▃▂▆▄▆▂▄▃▃▄▄▂▄▂▃▄▃▄2-15-2-1-5382-1-4405-41-1-111-30-4-10-10NANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine▁▇▅▃▆▅▄▄▃▅▄▃▂▄▆▃▄▇█▇▃▄▅▃▂▅▄-209756127655344715583924-236722650101121972649672825143NANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine▆▅▅▅▄▇▄▂▄▆▄▂▃▃▄▃▇▆▄▂▄█▆▁▄▄▆21435-430-9-32-916-9-24-15-12-8-202818-2-25-34314-40-7014NANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▂█▇▇█▅▇▇▆▁▆▆▇▆▇▇▇▇▇▇▇▇▇▆▆-35015546102172-1296547-19-445272875287343776069724669762328NA513863NA41-32652-8-48144865-61711073-31
us-gaap:NetIncomeLoss ▁█▆▇█▄▇▆▅█▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▆▆▅-1226626248428695-452553217-316421021002011001801231881561741761281671838491122131110154192111328613419-49621261562768245171-19
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:Assets ▇██▇▇▆▆▆▅▆▆▅▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁23367254082474224337233522193522480217602147021843215922123820753203862045520151194471888818751188881889718753184741833517942176621733917034170371654816479160891602215668154121570215369150951507014607NA14440NANA
 us-gaap:Assets us-gaap:StatementBusinessSegments srt:ConsolidatedPropertyAndCasualtyInsuranceEntity█▇▁█3444343733643441NA3285NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:Liabilities ████▇▆▆▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁1532515544153711520614722141021414613844135241360014069138651349713326133341318012712124611240112391122891218012098119921177411592115231133511252110951112010945108151061310626106451025110063100609870NA9680NANA
us-gaap:LiabilitiesAndStockholdersEquity ▇██▇▇▆▆▆▅▆▆▅▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁23367254082474224337233522193522480217602147021843215922123820753203862045520151194471888818751188881889718753184741833517942176621733917034170371654816479160891602215668154121570215369150951507014607NA14440NANA
us-gaap:StockholdersEquity ▆█▇▇▆▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁80429864937191318630783383347916794682437523737372567060712169716735642763506497660865736376634361686070581656995785545353595144520750554786505751185032501047374865476046264144
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▄▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁13001306129512861277128112731266125812651256124912431252124412371230123212231216121012141205119811911191117711621146113411191106110010961098109410901091108710841081108110781075
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆█▇▇▇▆▇▆▆▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁79329257872285668229762581647696756551805193517451565037501649154871476247564658455745054409429942874268421441524109402138963851388438853816386239773980391938283865386236813575
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us-gaap:CashAndCashEquivalentsAtCarryingValue ▄█████▆▄▅▆▆▅▅█▇▅▆▅▃▄▆▅▃▄▄▃▄▃▃▄▃▁▃▃▂▂▃▃▃▂▃▅▃▁486767787803802784616521604657674606543777700547613544419487640591412462521433511382380487416263424438308313379385445325402557448254
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us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▅█████▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▅▅▅281276269267265265259264259253251245242237234367465459452457452446439431424420412405398397390390383376368377368352358351NA335NANA
us-gaap:PropertyPlantAndEquipmentNet ▄▄▄▄▃▃▂▂▂▁▂▁▁▁▁▂▂▁▂▂▂▂▃▃▄▄▄▅▅▅▆▆▇▆▆▇█▆▇█208207207207202195191188186185186184181183184186188185188187189194198203207210211213216217223229235227228234243229236243NA251NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:LongTermDebt ▄▄▄▄▄▄▂▂▂▂▂▂▂▂▁▁▁▁████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇788788788788788788787787787787787787787787786786786786791791791791790790790790790790790790790790790790790790790790790790NA790NANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument cinf:SeniorNotesSixPointOneTwoFivePercentDueTwentyThirtyFour▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁████▆▆▆▆▆▆▆▆▆▆370370370370370370370370370370370370370370369369369369372372372372371371371371371371371371371371NA371NANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:StockholdersEquity ▆█▇▇▆▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁80429864937191318630783383347916794682437523737372567060712169716735642763506497660865736376634361686070581656995785545353595144520750554786505751185032501047374865476046264144
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▄▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁13001306129512861277128112731266125812651256124912431252124412371230123212231216121012141205119811911191117711621146113411191106110010961098109410901091108710841081108110781075
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆█▇▇▇▆▇▆▆▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁79329257872285668229762581647696756551805193517451565037501649154871476247564658455745054409429942874268421441524109402138963851388438853816386239773980391938283865386236813575
us-gaap:CommonStockValue ██████████████████████████▆▆▄▃▃▁▁▁▁▁▁▁▁▁397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393NA393NANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆█▇▇▇▆▇▆▆▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁7932925787228566822976258164769675655180519351745156503750164915487147624756465845574505440942994287426842144152410940213896385138843885381638623977398039193828NA3862NANA
us-gaap:TreasuryStockValue █▅▄▄▄▄▅▅▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁1791154414851482148314921496149813891387137013721320131912881292129413081306128812721287129312831285129012381232122712251221121612171220122411951197120112031204NA1200NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▂▂▂▂▁▁▁▁█▆▆▅▅▅▅▅▄▄▅▅▅▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃20444844236421022-455115278820471925178016931752171415311344128015141716174416581732157815041267122113621129117110101047901703903855769814636NA624NANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss▂▂▂▂▂▁▁▁▁█▆▆▅▅▅▅▅▄▄▅▅▅▅▅▅▅▄▄211467465386229377671292807206919461802171717891748156213721304154217491777167817561603152713411301NA1228NANANA977NANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▂▂▂▂▂▁▁▁▁█▆▆▅▅▅▅▅▄▄▅▅▅▅▅▅▅▄▄▄▄▄▄▄▃20444844236421022-455115278820471925178016931752171415311344128015141716174416581732157815041267122113621129117110101047901NANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▆█▅▃▇▇▆▂▆▅▆▁▅▆▄▄▆▅▄▃▄▅▃▁167328404276200355362310154306301309136279334233257309285255215240282222129NANANA57NA16811714899144-5357114NANA110163NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▄▁▄▆▆▅▃▆▅▅▅▂▆▆▃▅▇▃▁▅█▃▄█-136-153-310-160-56-71-115-211-54-99-126-87-246-70-79-199-108-4-231-301-8820-234-13639NANANA-102NA47-204-10063-9756-30-127NANA-239-31NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▇▇▇▇▆▅▆▄▇▆▇▆▇▇█▅▇▇██▇▆█-312-195-110-115-126-116-152-182-153-224-107-159-124-132-102-100-80-180-122-107-78-81-98-145-80NANANA-62NA-62-74-62-32-52-69-33-47NANA-26-23NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▆█▅▃▇▇▆▂▆▅▆▁▅▆▄▄▆▅▄▃▄▅▃▁167328404276200355362310154306301309136279334233257309285255215240282222129NANANA57NA16811714899144-5357114NANA110163NANA
us-gaap:NetIncomeLoss ▁█▆▇█▄▇▆▅█▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆▆▆▅-1226626248428695-452553217-316421021002011001801231881561741761281671838491122131110154192111328613419-49621261562768245171-19
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▄▁▄▆▆▅▃▆▅▅▅▂▆▆▃▅▇▃▁▅█▃▄█-136-153-310-160-56-71-115-211-54-99-126-87-246-70-79-199-108-4-231-301-8820-234-13639NANANA-102NA47-204-10063-9756-30-127NANA-239-31NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▂█▇▄▅▄▅▃▂▄▆▂▄▂▄▃▃▂▄▁▃▁▂▃4298565632572424332413123NANANA1NA122-58223NANA811NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▇▇▇▇▆▅▆▄▇▆▇▆▇▇█▅▇▇██▇▆█-312-195-110-115-126-116-152-182-153-224-107-159-124-132-102-100-80-180-122-107-78-81-98-145-80NANANA-62NA-62-74-62-32-52-69-33-47NANA-26-23NANA
us-gaap:PaymentsForRepurchaseOfCommonStock █▃▁▁▁▁▁▄▁▂▁▃▁▂▁▁▁▁▂▂▁▁▁▁▁▂▁256625000011015220551537020122120001407520NA0NANANA02NANANA0NANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393393
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.61.61.71.81.81.81.81.81.81.91.91.91.92.02.02.12.12.12.12.12.12.22.22.22.32.32.32.42.42.42.52.52.52.52.62.62.62.72.7

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:AwardType, us-gaap:DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensation

us-gaap:SharesIssued

us-gaap:PerformanceShares, us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value20549.080666.087228.025461.0103586.0
Percentage of SharesIssued100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value198198198198198198198198198198198198198198198198198198198198198198198198198198198198197197197197196196196196196196196197196
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value198198198198198198198198198198198198198198198198198198198198198198198198198198198198197197197197196
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value160162163163163162162162164163164163164164164164164163163164164163163164163163164164163163163162162162162163163163163163163162162162162166
Percentage of CommonStockSharesOutstanding81.182.182.482.382.382.182.082.082.882.782.782.783.082.983.183.082.982.782.682.782.982.682.382.882.382.382.882.882.782.782.782.20.082.70.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value162165165164164164164165166166166166166165165165165165165165165164163163163163163163
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value162163163163162163164164164164164164164164164164163163163163163163162162162162163162
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-7.563.841.512.624.27-2.783.41.33-0.193.920.620.611.220.611.090.751.140.951.061.070.781.031.120.510.560.750.80.670.951.180.690.20.530.820.12-0.30.380.77999999999999980.950.170.421.51000000000000021.05-0.12
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-7.563.791.492.594.22-2.783.381.32-0.193.880.610.61.210.61.080.741.130.941.051.060.771.021.110.510.550.740.790.660.941.170.680.20.530.820.12-0.30.380.780.950.170.421.51.05-0.12
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-99215217001913215971019151558122414111412138615231312140213711364126312781316128512621280121411891172115211041103107010351020986955944975929936107187888711331007874
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value919011981524036313028342723161512111212
Percentage of Revenues-91.94.27.04.22.45.61.92.02.52.02.41.91.51.21.10.90.81.00.10.2
Percentage of Revenues-91.94.27.04.22.45.61.92.02.52.02.41.91.51.21.10.90.81.00.10.2
Percentage of Revenues us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cinf:ExcessandSurplusLinesInsurance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-30
Value797673676461605856565353474945444243394234
Percentage of Revenues-79.83.54.33.53.08.63.13.74.64.03.83.83.63.53.33.53.33.33.13.32.8
Percentage of Revenues-79.83.54.33.53.08.63.13.74.64.03.83.83.63.53.33.53.33.33.13.32.8
Percentage of Revenues us-gaap:OperatingSegments cinf:ExcessandSurplusLinesInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:InvestmentsSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1560705247524820-613612259-41148160140309116204193206110146200186172203150157143155
Percentage of Revenues1575.832.814.527.438.0-86.332.016.6-3.310.511.310.120.38.814.614.115.18.711.415.214.513.615.912.413.212.213.5
Percentage of Revenues1575.832.814.527.438.0-86.332.016.6-3.310.511.310.120.38.814.614.115.18.711.415.214.513.615.912.413.212.213.5
Percentage of Revenues us-gaap:OperatingSegments us-gaap:InvestmentsSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value676871686766626561605761595460605954535354534754506639
Percentage of Revenues-67.73.24.23.63.19.33.24.25.04.34.04.43.94.14.34.44.34.34.14.04.24.23.74.44.25.63.4
Percentage of Revenues-67.73.24.23.63.19.33.24.25.04.34.04.43.94.14.34.44.34.34.14.04.24.23.74.44.25.63.4
Percentage of Revenues us-gaap:OperatingSegments us-gaap:LifeInsuranceSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value864854835824811813806812792798793797782781780772761762758746734731721715693681681
Percentage of Revenues-872.739.749.143.137.6114.542.152.164.756.656.257.551.359.555.656.355.860.359.356.757.157.956.358.958.358.159.1
Percentage of Revenues-872.739.749.143.137.6114.542.152.164.756.656.257.551.359.555.656.355.860.359.356.757.157.956.358.958.358.159.1
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value360359355349345343339333326321315308302298294289284281278272269266264259254249244
Percentage of Revenues-363.616.720.918.216.048.317.721.426.622.722.322.219.822.721.021.120.822.221.820.720.921.120.621.321.421.221.2
Percentage of Revenues-363.616.720.918.216.048.317.721.426.622.722.322.219.822.721.021.120.822.221.820.720.921.120.621.321.421.221.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Premiums Earned Net

us-gaap:PremiumsEarnedNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1456144114461384133313181298129412601258124712411208119211911173115411481127111110941086107110591027992954931889877839827812773782783784768746753766770
Percentage of PremiumsEarnedNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1470.767.085.172.361.7185.667.883.1102.989.288.389.579.390.985.085.684.690.988.284.485.186.183.787.286.486.186.484.485.986.085.186.686.079.384.283.773.287.584.166.576.188.1

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cinf:Reinsuranceassumedandothernonsegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value898811679503934302927322622161310101000
Percentage of PremiumsEarnedNet6.16.18.05.73.83.02.62.32.32.12.62.11.81.31.10.90.90.90.00.0
Percentage of Revenues-89.94.16.84.12.35.51.81.92.41.92.31.91.41.20.90.70.70.80.00.0
Percentage of Revenues us-gaap:CorporateNonSegment cinf:Reinsuranceassumedandothernonsegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cinf:ExcessandSurplusLinesInsurance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value787672676361605756565352484748454344424240394234333130
Percentage of PremiumsEarnedNet5.45.35.04.84.74.64.64.44.44.54.34.24.03.94.03.83.73.83.73.83.73.63.93.23.20.03.0
Percentage of Revenues-78.83.54.23.52.98.63.13.74.64.03.83.83.23.63.43.33.23.53.33.23.13.13.32.82.82.62.6
Percentage of Revenues us-gaap:OperatingSegments cinf:ExcessandSurplusLinesInsurance98.7100.098.6100.098.4100.0100.098.3100.0100.0100.098.10.0100.098.0100.00.0100.0100.097.70.0100.0100.0100.00.00.00.0

us-gaap:OperatingSegments, us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value676770676665616460595660575358595853515253514653486538
Percentage of PremiumsEarnedNet4.64.64.84.85.04.94.74.94.84.74.54.84.74.44.95.05.04.64.54.74.84.74.35.04.70.03.8
Percentage of Revenues-67.73.14.13.53.19.23.24.14.94.24.04.33.74.04.14.34.34.24.04.04.14.03.64.44.05.53.3
Percentage of Revenues us-gaap:OperatingSegments us-gaap:LifeInsuranceSegment100.098.598.698.598.598.598.498.598.498.398.298.496.698.196.798.398.398.196.298.198.196.297.998.196.098.597.4

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value863852834823810811805812790796792796781779779771760761757745733730720714692680680
Percentage of PremiumsEarnedNet59.359.157.759.560.861.562.062.862.763.363.564.164.765.465.465.765.966.367.267.167.067.267.267.467.40.068.5
Percentage of Revenues-871.739.649.143.037.5114.242.052.164.556.456.157.451.359.455.656.255.760.359.256.657.057.856.258.858.258.059.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine99.999.899.999.999.999.899.9100.099.799.799.999.999.999.799.999.999.999.999.999.999.999.999.999.999.999.999.9

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value359358354348344342338331325320314307300297293288283280277272268266263258254249244
Percentage of PremiumsEarnedNet24.724.824.525.125.825.926.025.625.825.425.224.724.824.924.624.624.524.424.624.524.524.524.624.424.70.024.6
Percentage of Revenues-362.616.620.818.215.948.217.721.226.622.722.222.219.722.620.921.020.722.221.720.720.921.120.521.321.421.221.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine99.799.799.799.799.799.799.799.499.799.799.799.799.399.799.799.799.699.699.6100.099.6100.099.699.6100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:CommercialAutoSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value185179175170168166161159158155151147144141139136133132126124
Percentage of PremiumsEarnedNet12.712.412.612.812.912.812.812.812.712.812.712.512.512.512.512.412.412.512.312.5
Percentage of Revenues-186.910.59.17.98.810.713.211.311.410.210.810.710.611.010.610.610.410.910.610.8
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine cinf:CommercialAutoSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:CommercialCasualtySegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value289277277268268272265268271265265263257257252244237234224221
Percentage of PremiumsEarnedNet19.819.220.020.120.621.021.021.521.821.922.322.422.322.822.722.322.122.121.822.3
Percentage of Revenues-291.916.314.512.414.017.521.719.019.617.418.919.218.820.119.119.018.519.318.819.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine cinf:CommercialCasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:CommercialPropertySegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value249241234234229231228225226223217215214205203196186180171161
Percentage of PremiumsEarnedNet17.116.716.917.617.617.918.118.018.218.518.218.318.518.218.317.917.417.016.716.2
Percentage of Revenues-251.514.212.210.812.014.818.615.916.314.615.515.715.716.015.415.314.514.814.414.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine cinf:CommercialPropertySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:OtherCommercialLines



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value65646361605856565554565756616164717379
Percentage of PremiumsEarnedNet4.54.44.64.64.64.54.44.54.44.54.74.94.95.45.55.96.66.97.7
Percentage of Revenues-65.73.83.32.83.13.74.64.04.03.54.04.24.14.84.65.05.56.06.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine cinf:OtherCommercialLines0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:WorkersCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value7573747780858084868490898993909393959295
Percentage of PremiumsEarnedNet5.25.05.35.86.26.66.36.76.97.07.67.67.78.38.18.58.79.09.09.6
Percentage of Revenues-75.84.33.93.64.25.56.55.96.25.56.46.56.57.36.87.27.37.87.78.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine cinf:WorkersCompensation0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine, cinf:HomeOwnerSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value159154149147142139136131128125122121119117114114110111109103
Percentage of PremiumsEarnedNet10.910.710.811.010.910.710.810.510.310.310.210.310.310.410.310.410.310.510.610.4
Percentage of Revenues-160.69.17.86.87.48.911.19.39.28.28.78.88.79.28.78.98.69.19.28.9
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine cinf:HomeOwnerSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine, cinf:OtherPersonalLines



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value4644444241393835353434323332333132302929
Percentage of PremiumsEarnedNet3.23.03.23.23.23.03.02.82.82.82.92.72.92.83.02.83.02.82.82.9
Percentage of Revenues-46.52.62.31.92.12.53.12.52.52.22.42.32.42.52.52.42.52.52.42.5
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine cinf:OtherPersonalLines0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine, cinf:PersonalAuto



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value154156155155155153151148144141137135131128125123121117116112
Percentage of PremiumsEarnedNet10.610.811.211.611.911.812.011.911.611.711.511.511.411.411.311.211.311.011.311.3
Percentage of Revenues-155.69.28.17.28.19.812.310.510.49.39.89.89.610.09.59.69.59.69.89.7
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine cinf:PersonalAuto0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Investment Income

us-gaap:NetInvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value165168161160157161154154150156153151149153148149145150143140139140138136135133131128132132131132130132131130128130130131127119
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-166.77.89.58.47.322.78.09.912.311.110.810.99.811.710.610.910.611.911.210.610.811.110.811.211.411.511.911.612.812.913.313.813.813.514.113.912.014.814.711.612.613.6

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, us-gaap:InvestmentsSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value165168161160157161154154150156153151149153148149145150143140139140138136135137133
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Revenues-166.77.89.58.47.322.78.09.912.311.110.810.99.811.710.610.910.611.911.210.610.811.110.811.211.411.711.5
Percentage of Revenues us-gaap:OperatingSegments us-gaap:InvestmentsSegment-10.623.865.230.519.1-26.325.259.5-365.9105.495.6107.948.2131.972.577.270.4136.497.970.074.781.468.090.786.095.885.8

Realized Investment Gains Losses

us-gaap:RealizedInvestmentGainsLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-172553786364663-774458105-191-87-11160-37564461-40360473265142222144110613-7-2671219155-238246110-18
Percentage of RealizedInvestmentGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1742.425.05.119.030.7-109.023.96.7-15.6-0.60.5-0.810.5-2.84.03.24.5-3.20.24.63.72.55.11.21.91.91.33.71.00.61.3-0.7-0.26.91.32.014.5-2.60.921.710.9-2.1

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-751-12-21
Percentage of RealizedInvestmentGainsLosses4.30.2-1.20.30.30.2
Percentage of Revenues75.80.0-0.10.1-0.30.1
Percentage of Revenues us-gaap:DebtSecurities0.00.00.00.00.00.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-165354189656-763458
Percentage of RealizedInvestmentGainsLosses95.8100.7103.598.998.6100.0
Percentage of Revenues1669.725.15.230.4-107.523.9
Percentage of Revenues us-gaap:EquitySecurities0.00.00.00.00.00.0

Other Income

us-gaap:OtherIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value223221211121102212122132232233223230432043
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0
Percentage of Revenues-2.00.10.20.10.10.10.10.10.10.10.10.10.10.00.10.10.10.20.10.20.20.10.20.20.20.30.20.20.30.30.20.20.30.20.30.00.40.30.20.00.40.3

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value232221121122112
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.00.20.10.10.10.10.10.10.10.10.10.10.10.10.2
Percentage of Revenues us-gaap:CorporateNonSegment2.22.52.53.85.63.23.35.93.74.313.316.79.1100.0100.0

Policyholder Benefits And Claims Incurred Net

us-gaap:PolicyholderBenefitsAndClaimsIncurredNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1003910932936860874879883854809874854853809753821724677670712749675686763732642631568571687582492656801575494575595516505498658
Percentage of PolicyholderBenefitsAndClaimsIncurredNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1013.142.354.848.939.8123.145.956.769.857.361.961.656.061.753.759.953.153.652.454.158.353.553.662.961.655.757.251.555.267.459.051.569.582.261.952.853.767.858.244.649.575.3

us-gaap:StatementBusinessSegments

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value930835864863790798813821
Percentage of PolicyholderBenefitsAndClaimsIncurredNet92.791.892.792.291.991.392.593.0
Percentage of Revenues-939.438.850.845.136.6112.442.552.7
Percentage of Revenues srt:ConsolidatedPropertyAndCasualtyInsuranceEntity0.00.00.00.00.00.00.00.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value736873706662636859606558636263615758605364565649484446474351494445414443
Percentage of PolicyholderBenefitsAndClaimsIncurredNet7.37.37.88.17.57.07.48.46.87.07.67.28.47.68.79.08.58.18.07.99.37.37.77.67.67.78.16.87.410.47.55.57.88.37.77.2
Percentage of Revenues-73.74.03.83.23.44.05.14.84.24.34.34.44.54.54.64.84.54.44.74.25.04.64.74.34.34.04.44.64.45.35.24.54.84.44.14.9
Percentage of Revenues us-gaap:LifeInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0103.7112.0125.6106.7102.3117.992.2104.9121.4111.4102.3118.4107.9107.3104.9

Deferred Policy Acquisition Cost Amortization Expense

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value265267270251246245231236234233237229214-1511222214212-1449207204209
Percentage of DeferredPolicyAcquisitionCostAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-267.712.415.913.111.434.512.115.119.116.516.816.514.1-115.215.815.615.5-114.716.215.516.3

us-gaap:StatementBusinessSegments

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value256257257239233233225225
Percentage of DeferredPolicyAcquisitionCostAmortizationExpense96.696.395.295.294.795.197.495.3
Percentage of Revenues-258.611.915.112.510.832.811.714.4
Percentage of Revenues srt:ConsolidatedPropertyAndCasualtyInsuranceEntity0.00.00.00.00.00.00.00.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9101312131261110917128-80151111-6610811
Percentage of DeferredPolicyAcquisitionCostAmortizationExpense3.43.74.84.85.34.92.64.74.33.97.25.23.75.36.85.15.24.64.83.95.3
Percentage of Revenues-9.10.50.80.60.61.70.30.70.80.61.20.90.5-6.11.10.80.8-5.20.80.60.9
Percentage of Revenues us-gaap:LifeInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value131314131313141313141313131413131313141313131313141314131413141413141314131314131414
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-13.10.60.80.70.61.80.70.81.11.00.90.90.91.10.90.91.01.01.11.01.01.01.01.11.21.11.31.21.41.31.41.51.41.41.41.51.21.51.61.11.41.6

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-1576781294530867-581618264-501971291282761282531662652162432481742362591071191671821482172731522911218611-97761742212185355244-50
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1591.936.317.327.740.2-81.832.316.9-4.114.09.19.218.19.818.012.119.417.119.018.813.518.720.28.810.014.215.813.419.725.514.72.811.419.51.2-9.98.218.620.62.49.631.324.2-5.7

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value-2-4-1-11-15-7-11-46-12-11-8-17-13-16-14
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments0.1-1.4-0.2-1.3-2.4-2.722.0-35.7-9.4-4.0-3.2-10.2-4.9-6.6-5.6
Percentage of Revenues2.0-0.2-0.1-0.5-0.8-0.4-0.9-3.3-0.9-0.7-0.6-1.2-1.0-1.3-1.1
Percentage of Revenues us-gaap:CorporateNonSegment-2.2-3.4-1.2-21.2-41.7-22.6-36.7-135.3-44.4-47.8-53.3-141.7-118.2-1600.0-700.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cinf:ExcessandSurplusLinesInsurance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value9131217111517131811131918202051722141148135494
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-0.61.74.13.21.3-2.62.84.9-36.05.610.114.86.515.67.93.06.410.25.84.42.33.45.04.73.45.42.2
Percentage of Revenues-9.10.60.70.90.52.10.90.81.50.80.91.41.21.51.40.41.21.71.10.80.30.61.00.40.30.80.3
Percentage of Revenues us-gaap:OperatingSegments cinf:ExcessandSurplusLinesInsurance11.417.116.425.417.224.628.322.432.119.624.535.80.042.640.811.10.050.033.325.60.020.531.014.70.00.00.0

us-gaap:OperatingSegments, us-gaap:InvestmentsSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1586680222499796-637588235-651251361172869318117118488125178165151182130136123134
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.687.175.594.291.8109.695.189.0130.063.5105.491.4103.672.771.5103.069.440.751.471.894.864.070.3121.5114.373.773.6
Percentage of Revenues1602.031.613.126.136.9-89.730.715.1-5.38.99.68.418.87.112.912.513.57.09.813.512.812.014.210.711.410.511.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:InvestmentsSegment101.796.589.995.297.1103.996.190.7158.584.585.083.692.680.288.788.689.380.085.689.088.787.889.786.786.686.086.5

us-gaap:OperatingSegments, us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value2-15-2-1-5382-1-4405-41-1-111-30-4-10-10
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-0.1-0.11.7-0.4-0.10.90.53.0-4.0-0.5-3.13.10.03.9-1.60.6-0.4-0.50.40.4-1.70.0-1.5-0.90.0-0.60.0
Percentage of Revenues-2.0-0.00.3-0.1-0.0-0.70.20.50.2-0.1-0.30.30.00.4-0.30.1-0.1-0.10.10.1-0.20.0-0.3-0.10.0-0.10.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:LifeInsuranceSegment3.0-1.57.0-2.9-1.5-7.64.812.33.3-1.7-7.06.60.09.3-6.71.7-1.7-1.91.91.9-5.60.0-8.5-1.90.0-1.50.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-209756127655344715583924-236722650101121972649672825143
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments1.312.419.02.38.8-9.55.517.8-30.029.430.218.8-0.728.128.515.718.946.849.839.114.920.825.926.21.730.523.6
Percentage of Revenues20.24.53.30.63.57.71.83.01.24.12.81.7-0.12.75.11.93.78.09.57.42.03.95.22.30.24.43.7
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine-2.311.46.71.59.46.84.25.81.97.34.93.0-0.34.69.23.46.613.316.013.03.56.79.33.90.37.56.3

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value21435-430-9-32-916-9-24-15-12-8-202818-2-25-34314-40-7014
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-1.30.51.00.9-0.5-5.2-1.5-12.118.08.1-7.0-18.8-5.4-9.4-3.2-12.010.68.3-0.8-10.1-1.718.25.4-37.4-5.90.07.7
Percentage of Revenues-21.20.20.20.3-0.24.2-0.5-2.1-0.71.1-0.6-1.7-1.0-0.9-0.6-1.52.11.4-0.2-1.9-0.23.41.1-3.3-0.60.01.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine5.81.10.81.4-1.28.7-2.7-9.6-2.85.0-2.9-7.8-5.0-4.0-2.7-6.99.96.4-0.7-9.2-1.116.25.3-15.4-2.80.05.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-35015546102172-1296547-19-44527287528734377606972466976232851386341-32652-8-48144865-61711073-31
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues353.57.22.75.38.0-18.23.43.0-1.6-31.51.92.04.92.15.23.15.64.85.45.53.65.55.91.92.44.43.45.74.0-0.32.65.4-0.8-4.91.55.16.1-0.71.99.77.2-3.5

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-1226626248428695-452553217-316421021002011001801231881561741761281671838491122131110154192111328613419-49621261562768245171-19
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1238.429.114.622.432.2-63.728.913.9-2.545.57.27.213.27.612.89.013.812.413.613.410.013.214.36.97.710.411.410.014.017.910.73.18.714.02.0-5.06.713.514.63.17.721.617.0-2.2

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-1226626248428695-452553217-316421021002011001801231881561741761281671838491154111328613419-496212668245
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1238.429.114.622.432.2-63.728.913.9-2.545.57.27.213.27.612.89.013.812.413.613.410.013.214.36.97.714.010.73.18.714.02.0-5.06.713.57.721.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2336725408247422433723352219352248021760214702184321592212382075320386204552015119447188881875118888188971875318474183351794217662173391703417037165481647916089160221566815412157021536915095150701460714440
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value111608964
Percentage of Assets43.940.9
Percentage of Assets43.940.9
Percentage of Assets srt:ParentCompany100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value707872936896834485476371416459478338385484499335361
Percentage of Assets3.03.43.83.73.62.22.11.71.92.12.21.61.92.42.41.71.9
Percentage of Assets3.03.43.83.73.62.22.11.71.92.12.21.61.92.42.41.71.9
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value34443437336434413285
Percentage of Assets14.713.513.614.115.0
Percentage of Assets14.713.513.614.115.0
Percentage of Assets srt:ConsolidatedPropertyAndCasualtyInsuranceEntity100.0100.0100.0100.0100.0

us-gaap:CorporateAndOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value872485459484361
Percentage of Assets3.42.22.12.41.9
Percentage of Assets3.42.22.12.41.9
Percentage of Assets us-gaap:CorporateAndOther100.0100.0100.0100.0100.0

us-gaap:InvestmentsSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17699195831890618464177381674117457169721674817112166931643116123155691568215506149781448514476146061454414441143221410413730136181313712983130991259912582123641222311883115891181411543
Percentage of Assets75.777.176.475.976.076.377.778.078.078.377.377.477.776.476.776.977.076.777.277.377.077.077.576.976.577.175.876.276.976.176.476.876.375.875.275.276.5
Percentage of Assets75.777.176.475.976.076.377.778.078.078.377.377.477.776.476.776.977.076.777.277.377.077.077.576.976.577.175.876.276.976.176.476.876.375.875.275.276.5
Percentage of Assets us-gaap:InvestmentsSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1517151615361536147214241418140614181409142414271359136614171422137213251328127713061316126912631302122512631254119312011200117712301244115112521214
Percentage of Assets6.56.06.26.36.36.56.36.56.66.56.66.76.56.76.97.17.17.07.16.86.97.06.96.97.36.97.37.47.07.37.37.37.77.97.58.08.0
Percentage of Assets6.56.06.26.36.36.56.36.56.66.56.66.76.56.76.97.17.17.07.16.86.97.06.96.97.36.97.37.47.07.37.37.37.77.97.58.08.0
Percentage of Assets us-gaap:LifeInsuranceSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value15325155441537115206147221410214146138441352413600140691386513497133261333413180127121246112401123911228912180120981199211774115921152311335112521109511120109451081510613106261064510251100631006098709680
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets65.661.262.162.563.064.362.963.663.062.365.265.365.065.465.265.465.466.066.165.665.064.965.565.465.665.666.566.566.067.067.568.067.567.768.967.866.766.766.867.667.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value12961131
Percentage of Liabilities8.38.0
Percentage of Assets5.15.2
Percentage of Assets srt:ParentCompany11.612.6

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2336725408247422433723352219352248021760214702184321592212382075320386204552015119447188881875118888188971875318474183351794217662173391703417037165481647916089160221566815412157021536915095150701460714440
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value111608964
Percentage of LiabilitiesAndStockholdersEquity43.940.9
Percentage of Assets43.940.9
Percentage of Assets srt:ParentCompany100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value8042986493719131863078338334791679468243752373737256706071216971673564276350649766086573637663436168607058165699578554535359514452075055478650575118503250104737486547604626414441825929
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.438.837.937.537.035.737.136.437.037.734.834.735.034.634.834.634.634.033.934.435.035.134.534.634.434.433.533.534.033.032.532.032.532.331.132.233.333.333.232.40.033.00.00.00.00.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value98647833
Percentage of StockholdersEquity100.0100.0
Percentage of Assets38.835.7
Percentage of Assets srt:ParentCompany88.487.4

us-gaap:Restatement, us-gaap:StatementEquityComponents

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value44836421022551152788
Percentage of StockholdersEquity4.54.02.40.30.71.433.8
Percentage of Assets1.81.50.90.10.30.512.8
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

srt:ScenarioPreviouslyReported, us-gaap:RetainedEarnings



Period End2019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value9257856682297625769675655180
Percentage of StockholdersEquity93.893.895.497.397.295.262.8
Percentage of Assets36.435.235.234.835.435.223.7
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value20444844236421022-4551152788204719251780169317521714153113441280151417161744165817321578150412671221136211291171101010479017039038557698146367226246753043472151
Percentage of StockholdersEquity2.54.54.74.02.40.3-0.00.71.433.827.226.124.524.024.624.622.720.920.223.326.026.526.027.325.624.821.821.423.520.721.919.620.117.814.717.916.715.316.213.414.813.114.67.38.336.3
Percentage of Assets0.91.81.81.50.90.1-0.00.30.512.89.59.18.68.38.68.57.97.16.88.09.19.39.09.48.88.57.37.28.06.87.16.36.55.84.65.85.65.15.44.40.04.30.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value1300130612951286127712811273126612581265125612491243125212441237123012321223121612101214120511981191119111771162114611341119110611001096109810941090109110871084108110811078107510691049
Percentage of StockholdersEquity16.213.213.814.114.816.415.316.015.815.316.716.917.117.717.517.718.319.219.318.718.318.518.918.919.319.620.220.419.820.820.921.521.121.722.921.621.321.721.722.922.222.723.325.925.617.7
Percentage of Assets5.65.15.25.35.55.85.75.85.95.85.85.96.06.16.16.16.36.56.56.46.46.56.56.56.66.76.86.86.76.96.86.96.97.07.17.07.17.27.27.40.07.50.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393393393393393393393
Percentage of StockholdersEquity4.94.04.24.34.65.14.85.05.04.85.35.45.55.65.65.75.96.26.36.16.06.06.26.36.46.56.86.96.87.27.47.67.57.88.27.87.77.87.88.38.18.38.59.59.46.6
Percentage of Assets1.71.61.61.61.71.81.81.81.81.81.81.91.91.91.92.02.02.12.12.12.12.12.12.22.22.22.32.32.32.42.42.42.52.52.52.52.62.62.62.70.02.70.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value7932925787228566822976258164769675655180519351745156503750164915487147624756465845574505440942994287426842144152410940213896385138843885381638623977398039193828386538623681357535793404
Percentage of StockholdersEquity98.693.893.193.895.497.398.097.295.262.869.070.271.171.370.470.572.374.174.971.769.068.569.167.869.570.372.572.971.073.772.774.974.676.979.776.477.779.178.280.879.481.179.686.385.657.4
Percentage of Assets33.936.435.335.235.234.836.335.435.223.724.124.424.824.724.524.425.025.225.424.724.124.023.923.423.924.224.324.424.124.323.623.924.224.824.824.625.926.426.026.20.026.70.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value-1791-1544-1485-1482-1483-1492-1496-1498-1389-1387-1370-1372-1320-1319-1288-1292-1294-1308-1306-1288-1272-1287-1293-1283-1285-1290-1238-1232-1227-1225-1221-1216-1217-1220-1224-1195-1197-1201-1203-1204-1196-1200-1201-1203-1206-1068
Percentage of StockholdersEquity-22.3-15.7-15.8-16.2-17.2-19.0-18.0-18.9-17.5-16.8-18.2-18.6-18.2-18.7-18.1-18.5-19.2-20.4-20.6-19.8-19.2-19.6-20.3-20.2-20.8-21.3-21.3-21.6-21.2-22.5-22.8-23.6-23.4-24.1-25.6-23.6-23.4-23.9-24.0-25.4-24.6-25.2-26.0-29.0-28.8-18.0
Percentage of Assets-7.7-6.1-6.0-6.1-6.4-6.8-6.7-6.9-6.5-6.3-6.3-6.5-6.4-6.5-6.3-6.4-6.7-6.9-7.0-6.8-6.7-6.9-7.0-7.0-7.2-7.3-7.1-7.2-7.2-7.4-7.4-7.6-7.6-7.8-7.9-7.6-7.8-8.0-8.0-8.20.0-8.30.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value4867677878038027846165216046576746065437777005476135444194876405914124625214335113823804874162634244383083133793854453254025574482541009226
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.13.03.23.33.43.62.72.42.83.03.12.92.63.83.42.73.22.92.22.63.43.22.22.52.92.52.92.22.22.92.51.62.62.82.02.02.52.63.02.20.03.90.00.00.00.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-312016-12-31
Value197209199248
Percentage of CashAndCashEquivalentsAtCarryingValue25.726.730.331.9
Percentage of Assets0.81.00.91.2
Percentage of Assets srt:ParentCompany1.82.30.00.0

Short Term Investments

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value281276269267265265259264259253251245242237234367465459452457452446439431424420412405398397390390383376368377368352358351335
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.11.11.11.11.21.21.21.21.21.21.21.21.21.11.82.42.42.42.42.42.42.42.42.42.42.42.42.32.42.42.42.42.42.42.42.42.32.42.42.3

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value129121
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment46.745.7
Percentage of Assets0.50.6
Percentage of Assets srt:ParentCompany1.21.3

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value208207207207202195191188186185186184181183184186188185188187189194198203207210211213216217223229235227228234243229236243251
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.80.80.90.90.90.80.90.90.80.90.90.90.90.90.91.01.01.01.01.01.01.11.11.21.21.21.31.31.31.41.41.51.41.51.51.61.51.61.71.7

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value141137
Percentage of PropertyPlantAndEquipmentNet68.170.3
Percentage of Assets0.60.6
Percentage of Assets srt:ParentCompany1.31.5

Deferred Tax Assets Liabilities Net

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value788788788788788788787787787787787787787787786786786786791791791791790790790790790790790790790790790790790790790790790790790
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.13.23.23.43.63.53.63.73.63.63.73.83.93.83.94.04.24.24.24.24.24.34.34.44.54.64.64.64.84.84.94.95.05.15.05.15.25.25.45.5

us-gaap:DebtInstrument

cinf:SeniorDebentures69PercentDue2028



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value2727262626282828
Percentage of LongTermDebt3.43.43.33.33.33.53.53.5
Percentage of Assets0.10.10.10.10.10.10.20.2
Percentage of Assets cinf:SeniorDebentures69PercentDue20280.00.00.00.00.00.00.00.0

cinf:SeniorDebenturesSixPointNinePercentDueTwentyTwentyEight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value272727272727262626262626262626262626282828282828282828282828282828
Percentage of LongTermDebt3.43.43.43.43.43.43.33.33.33.33.33.33.33.33.33.33.33.33.53.53.53.53.53.53.53.53.53.53.53.53.53.53.5
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets cinf:SeniorDebenturesSixPointNinePercentDueTwentyTwentyEight0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cinf:SeniorNotes6125PercentDue2034



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value370370370370369372371371
Percentage of LongTermDebt47.047.047.047.046.947.047.047.0
Percentage of Assets1.51.71.71.82.02.02.12.2
Percentage of Assets cinf:SeniorNotes6125PercentDue20340.00.00.00.00.00.00.00.0

cinf:SeniorNotesSixPointOneTwoFivePercentDueTwentyThirtyFour



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value370370370370370370370370370370370370370370369369369369372372372372371371371371371371371371371371371
Percentage of LongTermDebt47.047.047.047.047.047.047.047.047.047.047.047.047.047.046.946.946.946.947.047.047.047.047.047.047.047.047.047.047.047.047.047.047.0
Percentage of Assets1.61.51.51.51.61.71.61.71.71.71.71.71.81.81.81.81.92.02.02.02.02.02.02.02.12.12.12.22.22.22.32.32.4
Percentage of Assets cinf:SeniorNotesSixPointOneTwoFivePercentDueTwentyThirtyFour0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value8042986493719131863078338334791679468243752373737256706071216971673564276350649766086573637663436168607058165699578554535359514452075055478650575118503250104737486547604626414441825929
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.438.837.937.537.035.737.136.437.037.734.834.735.034.634.834.634.634.033.934.435.035.134.534.634.434.433.533.534.033.032.532.032.532.331.132.233.333.333.232.40.033.00.00.00.00.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value98647833
Percentage of StockholdersEquity100.0100.0
Percentage of Assets38.835.7
Percentage of Assets srt:ParentCompany88.487.4

us-gaap:Restatement, us-gaap:StatementEquityComponents

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value44836421022551152788
Percentage of StockholdersEquity4.54.02.40.30.71.433.8
Percentage of Assets1.81.50.90.10.30.512.8
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

srt:ScenarioPreviouslyReported, us-gaap:RetainedEarnings



Period End2019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value9257856682297625769675655180
Percentage of StockholdersEquity93.893.895.497.397.295.262.8
Percentage of Assets36.435.235.234.835.435.223.7
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value20444844236421022-4551152788204719251780169317521714153113441280151417161744165817321578150412671221136211291171101010479017039038557698146367226246753043472151
Percentage of StockholdersEquity2.54.54.74.02.40.3-0.00.71.433.827.226.124.524.024.624.622.720.920.223.326.026.526.027.325.624.821.821.423.520.721.919.620.117.814.717.916.715.316.213.414.813.114.67.38.336.3
Percentage of Assets0.91.81.81.50.90.1-0.00.30.512.89.59.18.68.38.68.57.97.16.88.09.19.39.09.48.88.57.37.28.06.87.16.36.55.84.65.85.65.15.44.40.04.30.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value1300130612951286127712811273126612581265125612491243125212441237123012321223121612101214120511981191119111771162114611341119110611001096109810941090109110871084108110811078107510691049
Percentage of StockholdersEquity16.213.213.814.114.816.415.316.015.815.316.716.917.117.717.517.718.319.219.318.718.318.518.918.919.319.620.220.419.820.820.921.521.121.722.921.621.321.721.722.922.222.723.325.925.617.7
Percentage of Assets5.65.15.25.35.55.85.75.85.95.85.85.96.06.16.16.16.36.56.56.46.46.56.56.56.66.76.86.86.76.96.86.96.97.07.17.07.17.27.27.40.07.50.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393393393393393393393
Percentage of StockholdersEquity4.94.04.24.34.65.14.85.05.04.85.35.45.55.65.65.75.96.26.36.16.06.06.26.36.46.56.86.96.87.27.47.67.57.88.27.87.77.87.88.38.18.38.59.59.46.6
Percentage of Assets1.71.61.61.61.71.81.81.81.81.81.81.91.91.91.92.02.02.12.12.12.12.12.12.22.22.22.32.32.32.42.42.42.52.52.52.52.62.62.62.70.02.70.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value7932925787228566822976258164769675655180519351745156503750164915487147624756465845574505440942994287426842144152410940213896385138843885381638623977398039193828386538623681357535793404
Percentage of StockholdersEquity98.693.893.193.895.497.398.097.295.262.869.070.271.171.370.470.572.374.174.971.769.068.569.167.869.570.372.572.971.073.772.774.974.676.979.776.477.779.178.280.879.481.179.686.385.657.4
Percentage of Assets33.936.435.335.235.234.836.335.435.223.724.124.424.824.724.524.425.025.225.424.724.124.023.923.423.924.224.324.424.124.323.623.924.224.824.824.625.926.426.026.20.026.70.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value-1791-1544-1485-1482-1483-1492-1496-1498-1389-1387-1370-1372-1320-1319-1288-1292-1294-1308-1306-1288-1272-1287-1293-1283-1285-1290-1238-1232-1227-1225-1221-1216-1217-1220-1224-1195-1197-1201-1203-1204-1196-1200-1201-1203-1206-1068
Percentage of StockholdersEquity-22.3-15.7-15.8-16.2-17.2-19.0-18.0-18.9-17.5-16.8-18.2-18.6-18.2-18.7-18.1-18.5-19.2-20.4-20.6-19.8-19.2-19.6-20.3-20.2-20.8-21.3-21.3-21.6-21.2-22.5-22.8-23.6-23.4-24.1-25.6-23.6-23.4-23.9-24.0-25.4-24.6-25.2-26.0-29.0-28.8-18.0
Percentage of Assets-7.7-6.1-6.0-6.1-6.4-6.8-6.7-6.9-6.5-6.3-6.3-6.5-6.4-6.5-6.3-6.4-6.7-6.9-7.0-6.8-6.7-6.9-7.0-7.0-7.2-7.3-7.1-7.2-7.2-7.4-7.4-7.6-7.6-7.8-7.9-7.6-7.8-8.0-8.0-8.20.0-8.30.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value397397397397397397397397397397397397397397397397397397397397397397397397397397396396395394394393393393393393393393393393393
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.61.61.71.81.81.81.81.81.81.91.91.91.92.02.02.12.12.12.12.12.12.22.22.22.32.32.32.42.42.42.52.52.52.52.62.62.62.72.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value79329257872285668229762581647696756551805193517451565037501649154871476247564658455745054409429942874268421441524109402138963851388438853816386239773980391938283862
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.936.435.335.235.234.836.335.435.223.724.124.424.824.724.524.425.025.225.424.724.124.023.923.423.924.224.324.424.124.323.623.924.224.824.824.625.926.426.026.226.7

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value92577625
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0
Percentage of Assets36.434.8
Percentage of Assets srt:ParentCompany82.985.1

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value17911544148514821483149214961498138913871370137213201319128812921294130813061288127212871293128312851290123812321227122512211216121712201224119511971201120312041200
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.76.16.06.16.46.86.76.96.56.36.36.56.46.56.36.46.76.97.06.86.76.97.07.07.27.37.17.27.27.47.47.67.67.87.97.67.88.08.08.28.3

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value15441492
Percentage of TreasuryStockValue100.0100.0
Percentage of Assets6.16.8
Percentage of Assets srt:ParentCompany13.816.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value20444844236421022-455115278820471925178016931752171415311344128015141716174416581732157815041267122113621129117110101047901703903855769814636624347
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.81.81.50.90.1-0.00.30.512.89.59.18.68.38.68.57.97.16.88.09.19.39.09.48.88.57.37.28.06.87.16.36.55.84.65.85.65.15.44.44.30.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value44822
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0
Percentage of Assets1.80.1
Percentage of Assets srt:ParentCompany4.00.2

us-gaap:Restatement, us-gaap:StatementEquityComponents

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312018-12-312017-12-31
Value467372807
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax104.2168.2100.7
Percentage of Assets1.80.212.9
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.0

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312017-12-31
Value448222788
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0
Percentage of Assets1.80.112.8
Percentage of Assets srt:ScenarioPreviouslyReported us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.0

us-gaap:StatementEquityComponents

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value1-10-10-9-5-1-1-2-3-8-5-4-5-6-10-7-30-3-6-10-9-8-11-12-11-12-17-33-19
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.5-2.2-2.3-2.5-2.4-4.525.0-3.6-2.6-0.3-0.2-0.2-0.3-0.4-0.6-0.4-0.20.0-0.2-0.4-0.6-0.5-0.5-0.6-0.8-0.7-0.9-1.4-2.9-2.1
Percentage of Assets0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.0-0.0-0.1-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.2-0.1
Percentage of Assets cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value-8-9-13-13-14-14-10-10-11-11-17-17-17-18-27-27-28-28-21-22-23-24-12-13-13-12-62-63-66-57
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-3.9-2.0-2.9-3.6-6.7-63.6250.0-18.2-9.6-0.4-0.8-0.9-1.0-1.1-1.5-1.6-1.8-2.1-1.6-1.5-1.3-1.4-0.7-0.8-0.8-0.8-4.9-5.2-5.8-6.3
Percentage of Assets-0.0-0.0-0.1-0.1-0.1-0.1-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.4-0.4-0.4-0.4
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value2114674653862293776712928072069194618021717178917481562137213041542174917771678175616031527134113011228977
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax103.4104.2105.2106.0109.0168.2-175.0121.8112.2100.7101.1101.1101.2101.4102.1102.0102.0102.1101.9101.8101.9101.9101.2101.4101.6101.5105.8106.6108.8108.4
Percentage of Assets0.91.81.91.61.00.20.00.30.612.99.69.28.78.48.78.78.07.37.08.29.39.59.19.68.98.67.77.67.46.2
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value20444844236421022-455115278820471925178016931752171415311344128015141716174416581732157815041267122113621129117110101047901
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.81.81.50.90.1-0.00.30.512.89.59.18.68.38.68.57.97.16.88.09.19.39.09.48.88.57.37.28.06.87.16.36.55.8
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value1673284042762003553623101543063013091362793342332573092852552152402822221295716811714899144-5357114110163
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-168.715.223.814.49.350.018.919.912.621.721.322.38.921.323.817.018.824.522.319.416.719.022.018.310.85.216.211.515.010.415.3-5.46.112.212.414.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-136-153-310-160-56-71-115-211-54-99-126-87-246-70-79-199-108-4-231-301-8820-234-13639-10247-204-10063-9756-30-127-239-31
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues137.4-7.1-18.2-8.4-2.6-10.0-6.0-13.5-4.4-7.0-8.9-6.3-16.2-5.3-5.6-14.5-7.9-0.3-18.1-22.9-6.81.6-18.3-11.23.3-9.24.5-20.0-10.16.6-10.35.7-3.2-13.6-26.9-2.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-312-195-110-115-126-116-152-182-153-224-107-159-124-132-102-100-80-180-122-107-78-81-98-145-80-62-62-74-62-32-52-69-33-47-26-23
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues315.2-9.1-6.5-6.0-5.8-16.3-7.9-11.7-12.5-15.9-7.6-11.5-8.1-10.1-7.3-7.3-5.9-14.3-9.5-8.1-6.1-6.4-7.7-11.9-6.7-5.6-6.0-7.3-6.3-3.4-5.5-7.1-3.6-5.0-2.9-2.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value1673284042762003553623101543063013091362793342332573092852552152402822221295716811714899144-5357114110163
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-168.715.223.814.49.350.018.919.912.621.721.322.38.921.323.817.018.824.522.319.416.719.022.018.310.85.216.211.515.010.415.3-5.46.112.212.414.4

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-1226626248428695-452553217-316421021002011001801231881561741761281671838491122131110154192111328613419-49621261562768245171-19
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1238.429.114.622.432.2-63.728.913.9-2.545.57.27.213.27.612.89.013.812.413.613.410.013.214.36.97.710.411.410.014.017.910.73.18.714.02.0-5.06.713.514.63.17.721.617.0-2.2

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-1226626248428695-452553217-316421021002011001801231881561741761281671838491154111328613419-496212668245
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1238.429.114.622.432.2-63.728.913.9-2.545.57.27.213.27.612.89.013.812.413.613.410.013.214.36.97.714.010.73.18.714.02.0-5.06.713.57.721.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-136-153-310-160-56-71-115-211-54-99-126-87-246-70-79-199-108-4-231-301-8820-234-13639-10247-204-10063-9756-30-127-239-31
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues137.4-7.1-18.2-8.4-2.6-10.0-6.0-13.5-4.4-7.0-8.9-6.3-16.2-5.3-5.6-14.5-7.9-0.3-18.1-22.9-6.81.6-18.3-11.23.3-9.24.5-20.0-10.16.6-10.35.7-3.2-13.6-26.9-2.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value42985656325724243324131231122-58223811
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-312-195-110-115-126-116-152-182-153-224-107-159-124-132-102-100-80-180-122-107-78-81-98-145-80-62-62-74-62-32-52-69-33-47-26-23
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues315.2-9.1-6.5-6.0-5.8-16.3-7.9-11.7-12.5-15.9-7.6-11.5-8.1-10.1-7.3-7.3-5.9-14.3-9.5-8.1-6.1-6.4-7.7-11.9-6.7-5.6-6.0-7.3-6.3-3.4-5.5-7.1-3.6-5.0-2.9-2.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-312011-12-312010-12-31
Value2566250000110152205515370201221200014075200020
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0100.00.00.0100.00.0100.0100.00.00.00.0100.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.2220.00300000000000000270.1560.1920.198-0.2550.1050.1780.38-0.67599999999999990.2090.2190.272-0.0099999999999999530.2890.2590.291-0.00100000000000000090.2840.290.2640.0100000000000000090.2930.2150.2350.280.2570.290.27-0.1030.232-4.143-0.7270.4950.1870.0159999999999999860.294-0.257
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value333334679
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value63.9956.0849.1442.1239.7839.138.3937.3436.71
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value977796679756855674547454654443343232
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value107962774586563812391081849710614
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value228198399408396396354
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312011-12-312010-12-312009-12-312008-12-31
Value3434343434340000002
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2020-03-312019-12-312018-12-31
Value0410
Percentage of DeferredTaxAssetsValuationAllowance0.0100.00.0

us-gaap:BusinessAcquisition

cinf:CincinnatiGlobalUnderwritingLtd.



Period End2019-12-312018-12-31
Value410
Percentage of DeferredTaxAssetsValuationAllowance100.00.0

cinf:MSPUnderwritingLimited



Period End2020-03-31
Value35
Percentage of DeferredTaxAssetsValuationAllowance0.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-20-1611816895-83-53-176863-23477153-6669125-68-15349179-50-5988-107153-161-14130-5-66-6-60-155109
Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-03-312018-12-31
Value486767802784
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0

us-gaap:RetirementPlanType

cinf:DefinedBenefitPlanNonServiceCostBenefit

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1-1-1-1-2-2-2
Percentage of DefinedBenefitPlanNonServiceCostBenefit100.0100.0100.0100.0100.0100.0100.0

cinf:EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesAmount



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value000-5000
Percentage of EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesAmount0.00.00.0100.00.00.0

cinf:EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesPercent



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value0.00.0-0.139-0.0810.00.0
Percentage of EffectiveIncomeTaxRateReconciliationTaxAccountingMethodChangesPercent0.00.0100.0100.00.00.0

cinf:FixedMaturityInvestmentsPercentageOfAmortizedCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value0.70.00.00.00.70.00.00.00.70.00.00.00.70.00.00.00.70.00.00.00.70.00.00.00.70.7
Percentage of FixedMaturityInvestmentsPercentageOfAmortizedCosts100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0100.0

us-gaap:StatementEquityComponents

cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossBeforeTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-30979919623734-76-77-215384188222134-925928328797-360-311-44133-11423611571-217358249-57225
Percentage of IncreaseDecreaseInOtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-24467815418826-59-60-17024912214587-593818318764-234-202-2886-741547446-141233161-37146
Percentage of IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:IncreaseDecreaseInOtherComprehensiveIncomeLossTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-6512142498-17-17-45135667747-332110010033-126-109-1647-40824125-7612588-2079
Percentage of IncreaseDecreaseInOtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:IncreaseDecreaseinPremiumsandReinsurancereceivable



Period End2020-03-312019-03-31
Value8695
Percentage of IncreaseDecreaseinPremiumsandReinsurancereceivable100.0100.0

cinf:InvestmentIncomeOtherLongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value3252321111111110111100011101111
Percentage of InvestmentIncomeOtherLongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.0

cinf:OtherComprehensiveIncomeChangeInLifeDeferredAcquisitionCostsLifePolicyReservesAndOtherTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value3-10-1-100111-10100-3-121200200280-2-1-2
Percentage of OtherComprehensiveIncomeChangeInLifeDeferredAcquisitionCostsLifePolicyReservesAndOtherTax100.0100.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0

cinf:OtherComprehensiveIncomeChangeInLifeDeferredAcquistionCostsLifePolicyReservesAndOtherNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-1101440-1-1-531-1-1-4343-3-3-411-3-11-5-160443
Percentage of OtherComprehensiveIncomeChangeInLifeDeferredAcquistionCostsLifePolicyReservesAndOtherNetOfTax100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentBeforeTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-324210020024239-77-80-221374189221131-11062289290102-365-319-43152-12023511762-244356253-53228
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-25627915719230-60-62-17524612314485-724118619068-238-207-2899-781537640-159232164-34148
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-6802143509-17-18-46128667746-382110310034-127-112-1553-42824122-8512489-1980
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentBeforeTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value14-1-1-5-50126-2-2124-3-7-4546-2-151-17240-6-5-5
Percentage of OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentBeforeTax100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value110-1-4-40115-3-1114-3-4-3334-1-131-15160-4-4-3
Percentage of OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

cinf:OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value3-10-1-100111-10100-3-1212-10200280-2-1-2
Percentage of OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentTax100.0100.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.00.0100.0100.0100.0

cinf:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialLossAndPriorServiceCostArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value02000-100061005001-3010-6000111101
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialLossAndPriorServiceCostArisingDuringPeriodTax0.0100.00.00.00.0100.00.00.00.0100.0100.00.00.0100.00.00.0100.0100.00.0100.00.0100.00.00.00.0100.0100.0100.0100.00.0100.0

us-gaap:InvestmentType

cinf:OtherRealizedInvestmentGainsLossesNet

us-gaap:EquitySecurities



Period End2020-03-312019-09-302019-03-312018-09-30
Value3-25-1
Percentage of OtherRealizedInvestmentGainsLossesNet100.0100.0100.0100.0

us-gaap:InvestmentType

cinf:OtherThanTemporaryImpairmentLosses

us-gaap:DebtSecurities



Period End2019-12-312019-09-302018-12-312018-09-30
Value15-650
Percentage of OtherThanTemporaryImpairmentLosses100.0100.0100.00.0

cinf:PurchaseOfTreasurySharesNonCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value302251112120433255515834490
Percentage of PurchaseOfTreasurySharesNonCash100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

cinf:ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value00001-20-1031-111-1100010000100
Percentage of ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax0.00.00.00.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.0100.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0000000000-100000-1-20-10-10003-1
Percentage of ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax0.00.00.00.00.0-0.00.0-0.00.00.0-100.0-0.00.00.0-0.00.00.00.00.0-100.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1610010001-51-356-13201521-141211613225737
Percentage of ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax0.00.00.00.0100.0-0.00.0-0.00.0-166.7100.0300.05600.0-1300.0-2000.01500.00.00.00.02100.00.00.00.00.0700.00.00.0

us-gaap:StatementEquityComponents

cinf:SharesAcquiredDuringPeriodValueEmployeeShareBasedCompensationPlans

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value302251112120433255515
Percentage of SharesAcquiredDuringPeriodValueEmployeeShareBasedCompensationPlans100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:UnderwritingAcquisitionAndInsuranceExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value456442455430411398401395403389393387377359380366360354348340345334319328320312307300296287274264260251261249258246268254247248
Percentage of UnderwritingAcquisitionAndInsuranceExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionsToContractHoldersFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value21192325192219222119181923242124262121212020212520242325319182053405860
Percentage of AdditionsToContractHoldersFunds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value97779667975685567455654443343232
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value2000112000000000000002566876
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:AssumedPremiumsEarned

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6654525043423836
Percentage of AssumedPremiumsEarned100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:AssumedPremiumsWritten

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11141417587304252
Percentage of AssumedPremiumsWritten100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value246232
Percentage of AvailableForSaleSecuritiesGrossRealizedGains100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses

us-gaap:DebtSecurities



Period End2019-12-312019-09-302018-12-312018-09-30
Value0.01000000.00.01000000.0
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses0.0100.00.0100.0

us-gaap:BenefitsLossesAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value14771371140613831292129112971294127412141283125812471184114912051099104710351068111110261021110710709709568868839918747699331072853762850857802778763924
Percentage of BenefitsLossesAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsIncurred



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value68-14376354433263941033232512113644119
Percentage of CapitalLeaseObligationsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect



Period End2020-03-312019-03-31
Value-28118
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:CededPremiumsEarned

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-48-49-62-52-42-40-39-41
Percentage of CededPremiumsEarned100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-18124-17-19-17122-18-1717181617171716161318161612171515141414141413
Percentage of CededPremiumsEarned37.5-253.127.436.540.5-305.046.241.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:CededPremiumsWritten

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-51-43-50-71-41-40-44-39
Percentage of CededPremiumsWritten100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.56000000000000030.560.560.560.530.530.530.53
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-03-31
Value0.60.56
Percentage of CommonStockDividendsPerShareDeclared0.0100.0

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-1470632326582883-426494157-20189122424528841218306375220-60-26100253109238165177-31387272-5232332-181-214881166194
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value34828282848-98332831273140106048655164704653681820463754346203617-5024105910157359-49
Percentage of CurrentIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-3531071874144-17716314-47-4760-3351813-5129520168585197-9616-252-10386-162371418
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpenseOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-2314911-2-2-7-10-3122-25210832-4-125
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-2314911-2-2-7-10-3122-25210832-4-125
Percentage of DeferredPolicyAcquisitionCostAmortizationExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostsAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value295259271295270238244266245224236249239210227230222206212221207197208216206211203198192192170175182183164166168171
Percentage of DeferredPolicyAcquisitionCostsAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value280244256280254221229251
Percentage of DeferredPolicyAcquisitionCostsAdditions94.994.294.594.994.192.993.994.4

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value151515151617151513131312131411121211111211
Percentage of DeferredPolicyAcquisitionCostsAdditions5.15.85.55.15.97.16.15.65.35.85.54.85.46.74.85.25.45.35.25.45.3

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value-1000000.00.0-1000000.00.00.0-1000000.00.0-1000000.00.0-1000000.00.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.00.0100.00.00.0100.00.0100.00.0100.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value55556656555
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value34334334434
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value11111012122
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanOtherCosts

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.00.00.01000000.00.00.00.0
Percentage of DefinedBenefitPlanOtherCosts0.00.00.0100.00.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value22223233233
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value846453546343633443234232432
Percentage of DefinedContributionPlanEmployerDiscretionaryContributionAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value2218181719151614181513131414101212131213141313121391011114151211111017
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:DirectPremiumsEarned

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value13711369138613191266125112381235
Percentage of DirectPremiumsEarned100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value858587868383798177777277747074757171676865686168625258565264
Percentage of DirectPremiumsEarned6.26.26.36.56.66.66.46.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:DirectPremiumsWritten

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value14581309136114721335118712481336
Percentage of DirectPremiumsWritten100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStockCash

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value97919291918785868716383828279797979150767576717372726666656565656665656564
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.210.00.210.210.210.00.210.210.210.00.350.350.350.00.350.350.350.00.350.350.350.00.350.350.350.350.350.350.350.350.350.00.350.350.350.00.350.35
Percentage of EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-0.003-0.0010.010.0080.0050.0470.0050.015-0.060.00.0620.070.0290.0059999999999999980.0320.0480.030.0009999999999999940.0330.0280.046-0.00299999999999999570.0270.065-0.059-0.033-0.042-0.026-0.04-0.207-0.048-1.563-0.4450.052-0.0680.0040000000000000036-0.021-0.214
Percentage of EffectiveIncomeTaxRateReconciliationDeductionsDividends100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.0060.002-0.027-0.002-0.001-0.007-0.0110.0020.010.0-0.0090.009-0.0160.0010.0030.0050.005-0.0010.0040.00.0060.0010.0050.0050.0110.0070.010.0030.0130.030.0060.162999999999999980.180.0030.0210.0010.0060.026
Percentage of EffectiveIncomeTaxRateReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-0.0030.00.0170.0080.0060.0620.0080.019-0.1-0.0019999999999999950.070.070.0330.00500000000000000440.0320.0480.034-0.00100000000000000090.0370.0320.046-0.0059999999999999980.0350.075-0.067-0.044-0.061-0.037-0.053-0.276-0.076-2.7430000000000003-0.8120.09-0.1160.01100000000000001-0.041-0.419
Percentage of EffectiveIncomeTaxRateReconciliationTaxExemptIncome100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnInvestments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-172586364663458105-191-51671219156-229254121-15
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, us-gaap:InvestmentsSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-172586364663458105-191
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-172953781362660-775457101-191-87
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-4-104-88
Percentage of GainLossOnSaleOfInvestments0.2-0.20.00.61.01.8

us-gaap:GrossInvestmentIncomeOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value168171165163160164157157153158156154151155151151147152146142141142140138137140135
Percentage of GrossInvestmentIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationDeductionsDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4534443539898988898788777666666555555
Percentage of IncomeTaxReconciliationDeductionsDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-33116462111182-12213056-1169464497458858937585876182913742645276531039664-35266177
Percentage of IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationOtherAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312010-09-30
Value-101-8-1-12-710-1-22-511112101311111121102212
Percentage of IncomeTaxReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxExemptIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5554555559999988989888988898888999999
Percentage of IncomeTaxReconciliationTaxExemptIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value091-10-8194-8222600-2621230-15042111-1-178967211
Percentage of IncomeTaxesPaidNet0.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedInvestmentIncomeReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-98-52-43-16-106-27-1113-55-810-3-10430-52-22-3-33-25-29
Percentage of IncreaseDecreaseInAccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value3-15-1053-120-3112127-26-15-5-7-4052-1664-6516322-3250-6824-83-4413-20-37-18103-234551-56
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredPolicyAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value31-814424-5123110-8-12025-55179-2517-2-121314519111214051315410-4
Percentage of IncreaseDecreaseInDeferredPolicyAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInFuturePolicyBenefitReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value2728273022282126212521252527252822312327201528274913201815-13293228272830
Percentage of IncreaseDecreaseInFuturePolicyBenefitReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInsuranceAssets



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value18-7513695-5-1510326-143-2547442-2110923-4837122-4510455082535719-103-38223461-69-83
Percentage of IncreaseDecreaseInInsuranceAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value59914765-4012911012372-77691049294211668618968138
Percentage of IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingLiabilities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value354785-93374852-137703657-139494256-98555732-100194230-102-882617-100174-709-1517-2918
Percentage of IncreaseDecreaseInOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value11-14-112225-218689-3325-66-7271239-610-4-19-5052-765-3-625-54-14
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-03-31
Value-123-93
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value151813521476138112461349
Percentage of IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInUnearnedPremiums



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value134-71-37179113-751311955-71148470-813910147-14248227-4618755983568247-24274433-2040-48
Percentage of IncreaseDecreaseInUnearnedPremiums100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:EmployeeStockOption



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value001100000011101110101001100100
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.00.0900000.0700000.0700000.00.0500000.0500000.00.00.0800000.0700000.0800000.00.01000000.0900000.0800000.0100000.0500000.0500000.0600000.00.0600000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.064.358.377.8-0.062.562.50.00.072.770.072.70.083.381.880.0100.050.055.660.00.066.7

us-gaap:InsuranceCommissionsAndFees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value34434434
Percentage of InsuranceCommissionsAndFees100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cinf:ExcessandSurplusLinesInsurance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000000.00.01000000.00.01000000.00.00.01000000.0
Percentage of InsuranceCommissionsAndFees33.30.025.00.025.00.00.025.0

us-gaap:OperatingSegments, us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01000000.01000000.01000000.01000000.01000000.01000000.01000000.0
Percentage of InsuranceCommissionsAndFees0.025.025.033.325.025.033.325.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12111210
Percentage of InsuranceCommissionsAndFees33.350.025.033.325.050.033.30.0

us-gaap:OperatingSegments, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11111112
Percentage of InsuranceCommissionsAndFees33.325.025.033.325.025.033.350.0

us-gaap:InterestCreditedToPolicyOwnerAccount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value11101011141211121113
Percentage of InterestCreditedToPolicyOwnerAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-03-312011-12-312011-09-302010-12-31
Value26026126026026026026026126001026026
Percentage of InterestPaidNet100.00.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.00.0100.00.0100.00.0100.0

us-gaap:InvestmentIncomeDividend



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value53555050465045444246434239443941374237353637353432303027282726
Percentage of InvestmentIncomeDividend100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value112114110111111112111112110111112111111110111110109109108106105105105103104104103102105106106
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInvestmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value3343333332332232223222222222222
Percentage of InvestmentIncomeInvestmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAssumed1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value77-36375231010-23014-37324290027
Percentage of LiabilitiesAssumed1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value186467457361177463392341195435411373185412374328146358343304147353353309197346329
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value631341373437647270313354519294314322509238288301416243261294399222286306387230233
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value930835864863790798813821791741815794788751690759661616613654689622622707676601593
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value1000000.00.01000000.00.00.01000000.00.00.00.01000000.00.01000000.00.01000000.01000000.01000000.01000000.00.0-1000000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.00.0100.00.00.0100.00.00.00.0100.00.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value14-6-3-60-900641035-4-5-4357-115-239270-5
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax100.0100.0100.0100.00.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-09-302012-06-30
Value06000-50001200013000-12000-2100-2830000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax0.0-100.0-0.0-0.00.055.60.00.00.0300.00.00.00.0260.0-0.0-0.0-0.0-400.00.00.0-0.0-2100.00.0-0.0-66.70.00.00.0-0.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-39939919924437-76-78-217360193211290-14811933135164-363-2603182-5525213582-230397262-47
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax-2850.0-50.0-3300.0-3316.70.0-411.10.00.0-3616.79000.019300.00.09666.7-2960.0-2975.0-6620.0-8775.02133.3-7260.0-3714.3-300.018200.0-1100.0-12600.04500.0911.1-851.90.0-5240.00.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value11-5-3-50-700501114-3-3-3144013-227170-3
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-09-302012-06-30
Value04000-400060008000-7000-1400-2540000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.0-80.0-0.0-0.00.057.10.00.00.00.00.00.00.0200.0-0.0-0.0-0.0-700.00.00.00.0-1400.00.0-0.0-100.00.00.00.0-0.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-31527815619328-59-60-172237126137188-977821323044-237-1692116-351658753-149258169-30
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-2863.6-40.0-2600.0-3120.00.0-400.00.00.0-3440.00.012600.013700.018800.0-2425.0-2600.0-7100.0-7666.74400.0-5925.0-4225.00.011600.0-1166.7-8250.04350.0757.1-876.50.0-5633.30.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3-10-10-200140-121-1-2-1213-1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.00.0100.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value02000-100060005000-5000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax0.0-200.00.0-0.00.050.00.00.00.0150.00.0-0.00.0500.0-0.0-0.0-0.0-250.00.00.0-0.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-8412143519-17-18-451236774102-514111812120-126-911
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax-2800.0-100.00.0-4300.00.0-450.00.00.0-4500.03075.00.0-7400.05100.0-5100.0-4100.0-5900.0-12100.01000.0-12600.0-3033.3-100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value14-1-1-5-50126-2-2124-3-7-4546-2-151-137
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value16010-50101210114011-10121-1810-1762
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent7.1-600.0-0.0-20.0-0.00.00.050.00.0-600.0-50.00.050.0350.0-0.0-14.3-25.0-200.025.033.3-50.01800.020.00.0100.02533.328.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-324210020024239-77-80-221374189221131-11062289290102-365-319-43152-12023511728662
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-2314.3-200.0-10000.0-4000.0-4840.00.0-7700.0-4000.0-3683.3-18700.0-9450.022100.06550.0-2750.0-2066.7-4128.6-7250.02040.0-9125.0-5316.72150.0-15200.0-2400.023500.0-11700.09533.3885.7

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-24467815418826-59-60-17024912214587-593818318764-234-202-2886-741547446-141233161-37146-20048
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-03-312011-09-30
Value-24467815418826-59-60-17024912214587-593818318764-234-202-2886-7415474233161146-200
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value110-1-4-40115-3-1114-3-4-3334-1-131-115
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value14010-401060019010-7111-1210-1501
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent9.10.0-0.0-25.0-0.00.00.0100.00.0-200.0-0.00.0100.0225.0-0.0-25.0-0.0-233.333.325.0-100.01200.033.30.0100.05000.020.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-25627915719230-60-62-17524612314485-724118619068-238-207-2899-781537618640
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-2327.30.0-7900.0-3925.0-4800.00.0-6000.0-6200.0-3500.0-8200.0-12300.014400.08500.0-1800.0-1366.7-4650.0-6333.32266.7-7933.3-5175.02800.0-9900.0-2600.015300.0-7600.018600.0800.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-1-60-1050-10-12-10-1-140-1-110-1-2-118-101-2-3-2-2-1-2
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.00.0100.00.0100.00.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-1-40-1040-10-600-1-90-107-1-1-112-101-1-2-1-1-1-1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.00.0100.00.0100.00.0100.00.0100.00.00.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value0-20001000-6-100-500-130-106000-1-1-1-10-1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax0.0100.00.00.00.0100.00.00.00.0100.0100.00.00.0100.00.00.0100.0100.00.0100.00.0100.00.00.00.0100.0100.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3-10-1-100111-10100-3-1212-1020022
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value02000-100061005001-3010-6000261
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent10.0-200.00.0-0.0-0.00.00.00.00.0600.0-100.00.00.00.00.0-0.0-100.0-150.00.050.0-0.00.00.00.00.01300.050.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-6802143509-17-18-46128667746-382110310034-127-112-1553-42824110022
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-2266.7-0.00.0-4300.0-5000.00.00.0-1800.0-4600.012800.0-6600.00.04600.00.00.0-3433.3-10000.01700.0-12700.0-5600.01500.00.0-2100.00.00.05000.01100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-25627915719230-60-62-17524612314485-724118619068-238-207-2899-781537640-159232263-47241330-305142142
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-6802143509-17-18-46128667746-382110310034-127-112-1553-42824122-8512489-1980
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5654863342344235233344334345244-14645434644
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForLossesAndLossAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value817808830798824733705695714729725695694650662629562601604598546575639615584576562
Percentage of PaymentsForLossesAndLossAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-03-312011-12-312011-09-302009-12-31
Value1416155362166535161017-4-220-1-2-4-2-1-21-2-2-32
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value90909090858585868016181817777787774148737471707071676563646464646364636363
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value336397580476289260345467438568353399403529490479496325392657348338390348236325311299304153289376269338431366
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value13241129186261301623911011447393134336231129114150162679819071331081151149615879346612088140
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireFinanceReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value698988910611795434644335454869997791079
Percentage of PaymentsToAcquireFinanceReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:PolicyholderBenefitsAndClaimsIncurredGross

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value900894855866787794792821
Percentage of PolicyholderBenefitsAndClaimsIncurredGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value851008787851008270768373877675728076787072727180688064626462575365585653605957
Percentage of PolicyholderBenefitsAndClaimsIncurredGross9.411.210.210.010.812.610.48.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:PremiumsEarnedNetLife

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6767706766656164605956605753585958535152535146534838444238514142434337384140
Percentage of PremiumsEarnedNetLife100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:PremiumsEarnedNetPropertyAndCasualty

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value13891374137613171267125312371230
Percentage of PremiumsEarnedNetPropertyAndCasualty100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value32125336335626920724628139335727529124935134045236823828640826734419422925222132916519521620124214912917682
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-26-24-1-10-19-7-12-4-37-25-10-4-15-10-2-4-4-4-4-5-4-4-5-6-2-4-4-3-3-3-1-4-3-4-2-3
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfNotesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7511502-317
Percentage of ProceedsFromRepaymentsOfNotesPayable100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndCollectionOfFinanceReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value797677666665669788778888778797986878
Percentage of ProceedsFromSaleAndCollectionOfFinanceReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value2141951130105380120011418661302024121032262451428637459
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value795211131110159301042332722161541037613210120154671101435131984125991296820913314531342
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value4224322143226444910347833861
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0-5-2-15-9-1-2063-111-120-211120-3412
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-100-1000-100-10-1-10-1-1-2-1-2-1-3-10-17-2
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.0-0.0-0.0100.00.0-0.0-0.050.00.00.0-33.3-0.0-100.0-100.0-0.0-50.00.0100.0-100.0-200.0-100.0-150.00.0-0.0-25.0700.0-100.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-751-1-12121242924-10159-38574261-382594630651718520
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.0-20.050.0100.040.0-133.3-100.0-100.00.04866.7133.31000.015900.0-3800.0-5700.02100.00.01900.0200.05900.04600.01500.00.0-566.7450.0500.01000.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0-5-2-14-7-1-1032000010-210120-3312
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.00.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-100-1000-10000-1-10-100-1-1-1-2-10-14-1
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.0-0.0-0.0100.00.0-0.0-0.0100.00.00.00.00.00.00.00.0-100.00.0-0.0-100.00.0-100.0-100.00.0-0.0-33.3400.0-50.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-590-1-11-2123-93-7103-25372740-241383017431211213
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.0-0.050.0100.025.028.6-100.0-200.00.0-300.0150.00.00.00.00.02700.00.01200.0100.00.03000.0850.00.0-400.0366.7200.0650.0

us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3430372525702613
Percentage of ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

srt:ConsolidatedPropertyAndCasualtyInsuranceEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-4-89-28-28-22-66-5-13
Percentage of ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-12334-19-14-15304-16-8131514271117918131713141218161224151420161010149128191514
Percentage of ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded300.0-375.367.950.068.2-460.6320.061.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-99215217001913215971019151558122414111412138615231312140213711364126312781316128512621280121411891172115211041103107010351020986955944975929936107187888711331007874
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-03-312012-03-312010-12-312010-09-30
Value400000.0100000.0100000.0100000.0400000.0100000.0100000.0100000.0400000.0100000.0100000.0100000.0500000.0200000.0100000.0200000.0500000.0300000.0200000.0200000.0600000.00.00.00.00.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-03-312012-09-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-16011-14000-17000-18110-10220-11790-50-3-20-2
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.00.0100.0100.0100.00.00.00.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.00.0100.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01000000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised-0.00.00.00.0-0.00.00.00.0-0.00.00.00.0-0.00.00.00.0-0.00.00.00.0-0.00.00.00.00.014.3

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value112331332214432177651812641951013003-130
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised-68.80.0300.0300.0-92.90.00.00.0-82.40.00.00.0-94.4700.0600.00.0-180.0600.0300.00.0-172.771.411.10.00.0-60.00.0-0.0-150.00.0-150.00.0

us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-110-1-1-18-1-1-18-20-18-1-1-114-7-6418-7-700000-1-32-21-1
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-15-10-16-10-18-1-1-18-1-1-129-3-4-1524-4-2-12-2-1-1-2-3-1-2-1-3-1-1
Percentage of StockholdersEquityOther100.050.0100.0-0.0100.075.0100.0-0.0100.0100.050.00.0100.0100.0100.0100.0100.0207.142.966.7-375.0133.357.128.60.00.00.00.00.00.0100.066.7-50.0150.0-100.0100.0

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value963880916947857842857852839764835832826768730808723660661724711600647773705608631
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-33-45-52-84-67-44-44-31-48-23-20-38-38-17-40-49-62-44-48-70-2222-25-66-29-7-38
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

cinf:ExcessandSurplusLinesInsurance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value10-4-5-2-2-8-4-10-4-3-9-13-7-12-1-14-14-7-9-5-6-6-8-9
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense-3.0-0.07.76.03.04.518.212.920.817.415.023.734.241.230.02.022.631.814.612.922.7-27.324.012.131.0

us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-6-39-33-58-62-43-37-42-35-18-18-26-11-11-31-58-29-34-43-63-1427-24-57-3
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense18.286.763.569.092.597.784.1135.572.978.390.068.428.964.777.5118.446.877.389.690.063.6122.796.086.410.3

us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-28-10-6-143-3017-1-10-3-100410-18422-315-1-17
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense84.822.211.516.7-4.56.8-0.0-54.82.14.3-0.07.926.3-0.0-10.0-20.429.0-9.1-4.2-2.913.64.5-20.01.558.6

us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:CommercialAutoSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value62-6-1135-2891041384111112
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense-18.2-3.87.116.4-6.8-16.14.2-40.0-23.7-26.3-10.0-26.5-12.9-8.3-15.7-50.0-48.0

us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:CommercialCasualtySegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302015-09-302015-06-302014-09-302014-06-30
Value-5-8-25-31-20-1450-715-7-20-16-23-8-24
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense15.215.429.846.345.545.2-10.4-0.018.4-39.517.540.833.332.932.036.4

us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine, cinf:WorkersCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value-7-20-27-15-9-18-13-14-12-18-16-23-13-25-41-15-15
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense21.238.532.122.420.558.127.170.031.647.440.046.921.052.158.668.260.0

us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine, cinf:Homeowner



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302016-03-312015-03-31
Value-180411714-8-7
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense54.5-0.0-4.8-16.4-15.9-45.212.931.8

us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine, cinf:PersonalAuto



Period End2020-03-312019-09-302019-06-302016-09-302016-06-30
Value-13-3-15914
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense39.45.817.9-22.5-28.6

us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value20000001000000000000000
Percentage of TreasuryStockSharesAcquired100.0100.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.00.00.0100.0100.0100.00.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-12-312010-12-312010-09-30
Value25662500001101522055153702012212000140790200
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0100.00.00.0100.00.0100.0100.00.0100.00.00.0

us-gaap:InvestmentType

us-gaap:UnrealizedGainLossOnInvestments

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1649-27108965253450
Percentage of UnrealizedGainLossOnInvestments100.0100.0100.0100.0100.0100.0

us-gaap:WithdrawalFromContractHoldersFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value404140494450454246453640433741383947343433353343323121342857202222211717
Percentage of WithdrawalFromContractHoldersFunds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Restatement, us-gaap:StatementEquityComponents

cinf:AccumulatedOtherComprehensiveIncomeLossTax

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312018-12-312017-12-31
Value1239733
Percentage of AccumulatedOtherComprehensiveIncomeLossTax100.0100.0100.0

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312017-12-31
Value1207730
Percentage of AccumulatedOtherComprehensiveIncomeLossTax97.677.899.6

us-gaap:StatementEquityComponents

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value0-3-2-2-1000-1-2-3-2-2-3-3-301-1-2-4-3-3-5-5-5-7-9-17-10
Percentage of AccumulatedOtherComprehensiveIncomeLossTax0.0-2.40.00.00.00.00.00.00.0-0.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value00-2-2-2-2-1-1-1-1-7-8-8-8-13-13-13-14-11-11-12-12-6-6-6-6-32-33-35-31
Percentage of AccumulatedOtherComprehensiveIncomeLossTax0.00.00.00.00.0-22.20.00.00.0-0.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value551231231025990173573310971031954908946925822722688815927942889931849808708686647512
Percentage of AccumulatedOtherComprehensiveIncomeLossTax0.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value5512011998567-1163373010871021944897930909809709676802911927880920838797669644720595618530550471
Percentage of AccumulatedOtherComprehensiveIncomeLossTax0.097.60.00.00.077.80.00.00.099.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cinf:AvailableForSaleSecuritiesEquitySecuritiesCost



Period End2019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value358133683094321832402995316931892999293829702828274827282697258225452523247124522416236923152248215821622132211522232286217721162016
Percentage of AvailableForSaleSecuritiesEquitySecuritiesCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value14271282
Percentage of AvailableForSaleSecuritiesEquitySecuritiesCost39.838.1

us-gaap:FinancialInstrument, us-gaap:InvestmentType

cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss3

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value002
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value53936
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.00.01800.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.00.00.01000000.0
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.00.050.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0006
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.00.0300.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value10013
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.00.0650.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value63958
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss30.00.00.02900.0

cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossAccumulatedinInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3581811371051
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossAccumulatedinInvestments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value802
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3100.00.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value18151387
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss32262.50.00.04350.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.00.00.01000000.0
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss30.00.00.050.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0107
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss30.00.00.0350.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value61031
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss375.00.00.01550.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value195713128
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss32437.50.00.06400.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

cinf:AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss3

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value800
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss3100.00.00.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value1762451
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss32200.00.00.00.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.01000000.00.01000000.0
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss30.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value51018
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss362.50.00.00.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value1894470
Percentage of AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss32362.50.00.00.0

us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:NewAccountingPronouncementEarlyAdoption, us-gaap:StatementEquityComponents

cinf:CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax

us-gaap:AccountingStandardsUpdate201802, us-gaap:NewAccountingPronouncementEarlyAdoptionEffect, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312018-12-312017-12-31
Value00-492
Percentage of CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax0.00.0100.0

us-gaap:AccountingStandardsUpdate201802, us-gaap:NewAccountingPronouncementEarlyAdoptionEffect, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312017-12-31
Value00-492
Percentage of CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax0.00.0100.0

cinf:DeferredTaxLiabilitiesPolicyLiabilitiesLife



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value12011711116213711086654226
Percentage of DeferredTaxLiabilitiesPolicyLiabilitiesLife100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:DeferredTaxLiabilitiesUnrealizedGainsAndLossesOnInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value995542740907719937807605481411
Percentage of DeferredTaxLiabilitiesUnrealizedGainsAndLossesOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:ExcessofSeparateAccountFairValueoverAccountValue



Period End2019-12-312018-12-31
Value52-3
Percentage of ExcessofSeparateAccountFairValueoverAccountValue100.0100.0

cinf:IncreasetoallowancethroughretainedearningsforASU201613aftertax



Period End2019-12-31
Value2
Percentage of IncreasetoallowancethroughretainedearningsforASU201613aftertax100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2019-12-31
Value-2
Percentage of IncreasetoallowancethroughretainedearningsforASU201613aftertax-100.0

cinf:NumberOfCreditFacilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312012-12-312011-12-312010-12-31
Value1.01.01.01.01.01.02.02.0
Percentage of NumberOfCreditFacilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

cinf:NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths

us-gaap:DebtSecurities



Period End2019-12-312019-09-302018-12-312017-12-31
Value38.062.0400.0249.0
Percentage of NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths100.0100.0100.0100.0

us-gaap:InvestmentType

cinf:NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonthsandBelow70PercentofAmortizedCost

us-gaap:DebtSecurities



Period End2019-12-312019-09-302018-12-312017-12-31
Value0.02.00.00.0
Percentage of NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonthsandBelow70PercentofAmortizedCost0.0100.00.00.0

cinf:NumberOfSecuritiesOtherThanTemporaryImpairmentLosses



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3.01.06.04.020.06.07.013.012.015.050.0
Percentage of NumberOfSecuritiesOtherThanTemporaryImpairmentLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers

cinf:PercentageOfPremiums

cinf:LargestCustomer



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.0130.0080.0080.00.010.0080.0080.0090.012
Percentage of PercentageOfPremiums100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers, us-gaap:Range

cinf:AllOther, srt:Maximum



Period End2019-12-31
Value0.04
Percentage of PercentageOfPremiums307.7

us-gaap:Range, us-gaap:StatementGeographical

srt:Maximum, cinf:OtherState



Period End2019-12-31
Value0.06
Percentage of PercentageOfPremiums461.5

srt:Minimum, cinf:OtherState



Period End2019-12-31
Value0.04
Percentage of PercentageOfPremiums307.7

us-gaap:StatementGeographical

cinf:State



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.5480.5840.5970.610.620.6280.6380.6540.6650.671
Percentage of PercentageOfPremiums4215.47300.07462.50.06200.07850.07975.07266.75541.70.0

stpr:OH



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.1510.1590.1620.00.170.1770.185
Percentage of PercentageOfPremiums1161.51987.52025.00.01700.02212.52312.5

cinf:PercentageOfReservesForAsbestosAndEnvironmentalClaims



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.020.020.020.0180.0190.020.0190.0180.0350.035
Percentage of PercentageOfReservesForAsbestosAndEnvironmentalClaims100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:ReinsuranceRecoverable



Period End2020-03-312019-12-31
Value567610
Percentage of ReinsuranceRecoverable100.0100.0

us-gaap:AwardType, us-gaap:DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensation

cinf:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValueAggregate

cinf:ServiceBasedShares, us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value252423232614151
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValueAggregate100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares, us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value26766332
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValueAggregate8.025.030.426.123.121.420.0200.0

srt:LifeInsuranceInForceCeded



Period End2019-12-312018-12-312017-12-31
Value381463858438711
Percentage of LifeInsuranceInForceCeded100.0100.0100.0

srt:LifeInsuranceInForceGross



Period End2019-12-312018-12-312017-12-31
Value10813010472699888
Percentage of LifeInsuranceInForceGross100.0100.0100.0

srt:LifeInsuranceInForceNet



Period End2019-12-312018-12-312017-12-31
Value699846614261177
Percentage of LifeInsuranceInForceNet100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:AccruedEmployeeBenefitsCurrentAndNoncurrent

us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value11109
Percentage of AccruedEmployeeBenefitsCurrentAndNoncurrent100.0100.0100.0

us-gaap:AccruedInvestmentIncomeReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value124133125130128132129130124134128130123134121126121129119122123123119116116121115116117115116118116119117120117119114120118
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value76
Percentage of AccruedInvestmentIncomeReceivable5.34.5

us-gaap:Restatement, us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312018-12-312017-12-31
Value590463540
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax1100.0100.0100.0

srt:ScenarioPreviouslyReported, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312017-12-31
Value568293518
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax196.363.099.4

us-gaap:StatementEquityComponents

cinf:AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value1-13-12-11-6-1-1-2-4-10-8-6-7-9-13-10-31-4-8-14-12-11-16-17-16-19-26-50-29
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax10.0-2.20.00.00.0-2.20.00.00.0-0.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value-8-9-15-15-16-16-11-11-12-12-24-25-25-26-40-40-41-42-32-33-35-36-18-19-19-18-94-96-101-88
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax10.0-1.50.00.00.0-34.80.00.00.0-0.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value26659058848828846784164354031662977275626252735267323842094199223572676271925672687245223352049198718751489
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax10.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value25956856146226629-571148351831342946272425902682262323402053195623162627267125382652241623011936186517241372
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax10.096.30.00.00.063.00.00.00.099.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value13001306129512861277128112731266125812651256124912431252124412371230123212231216121012141205119811911191117711621146113411191106110010961098109410901091108710841081
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value13061281
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0

us-gaap:AssetsHeldByInsuranceRegulators



Period End2019-12-312018-12-31
Value117112
Percentage of AssetsHeldByInsuranceRegulators100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value110741110811012108321073410643106531055210364103141013510106998197999657951894429324932092248961887189248638
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value4935
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.40.3

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value113
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value33285
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax3018.22833.3

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value21
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax18.233.3

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value0.01000000.0
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.033.3

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value25284
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax2290.92800.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value597174
Percentage of AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax5427.35800.0

us-gaap:AvailableForSaleEquitySecuritiesAmortizedCostBasis



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value370235813548347133813368329431980309432642995
Percentage of AvailableForSaleEquitySecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecurities

cinf:ForeignGovernment, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value2810
Percentage of AvailableForSaleSecurities100.0100.0

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value284301305288
Percentage of AvailableForSaleSecurities0.01075.00.02880.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6133640164105710
Percentage of AvailableForSaleSecurities0.022860.70.057100.0

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value23282410
Percentage of AvailableForSaleSecurities0.0100.00.0100.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value10210410967
Percentage of AvailableForSaleSecurities0.0371.40.0670.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value87136162310
Percentage of AvailableForSaleSecurities0.0485.70.03100.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value4711472845904304
Percentage of AvailableForSaleSecurities0.016885.70.043040.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value11340116981160010689
Percentage of AvailableForSaleSecurities0.041778.60.0106890.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value211153
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value18033231585
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax9000.03018.22100.02833.3

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6231
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax300.018.220.033.3

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value1000000.00.00.01000000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax50.00.00.033.3

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value27225226884
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax13600.02290.91786.72800.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value461597601174
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax23050.05427.34006.75800.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value8002
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.00.00.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value18151387
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2262.50.00.04350.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.00.00.01000000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.00.050.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0107
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.00.0350.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value61031
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax75.00.00.01550.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value195713128
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2437.50.00.06400.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAmortizedCost

cinf:ForeignGovernment, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value2810
Percentage of AvailableForSaleSecuritiesAmortizedCost100.0100.0

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value290290290287
Percentage of AvailableForSaleSecuritiesAmortizedCost0.01035.70.02870.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6134607461085712
Percentage of AvailableForSaleSecuritiesAmortizedCost0.021692.90.057120.0

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value23282410
Percentage of AvailableForSaleSecuritiesAmortizedCost0.0100.00.0100.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value9610210667
Percentage of AvailableForSaleSecuritiesAmortizedCost0.0364.30.0670.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value86137162316
Percentage of AvailableForSaleSecuritiesAmortizedCost0.0489.30.03160.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value4445447743224251
Percentage of AvailableForSaleSecuritiesAmortizedCost0.015989.30.042510.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value11074111081101210643
Percentage of AvailableForSaleSecuritiesAmortizedCost0.039671.40.0106430.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value02
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value336
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.01800.0

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-31
Value0.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value0.01000000.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.050.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value06
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.0300.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value013
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.0650.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value358
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.02900.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value02
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value587
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.04350.0

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-31
Value0.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value0.01000000.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.050.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value17
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.0350.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value131
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.01550.0

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value7128
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.06400.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value1636141
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value22203174522583
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue1362.05283.30.01831.9

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-30
Value151112
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue9.2183.30.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value04933
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue0.066.70.023.4

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value07797260
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue0.01283.30.0184.4

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value79108221163
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue48.51800.00.0824.8

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value24775235924180
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue1519.68716.70.02964.5

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value251
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2019-12-31
Value0.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.0

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value118
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss50.035.3

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value470
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss200.0137.3

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value163677
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value21681992542082
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue1330.13316.70.02703.9

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-30
Value151112
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue9.2183.30.0

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0050
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue0.00.00.00.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0261949
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue0.0433.30.063.6

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value76989823
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue46.61633.30.01068.8

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value24223402993031
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue1485.95666.70.03936.4

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312018-12-31
Value0064
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.0100.0

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value52118198501
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.0782.8

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value04433
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.051.6

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value05178211
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.0329.7

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value31013340
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.0531.2

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value551832931149
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.01795.3

us-gaap:AvailableForSaleSecuritiesDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value113401169811600113201102210689106601063610528106991054010502103011008510257101389884965097569675959694609522938391809121903889929169909391169025895687798854871785368383846683397855
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value4935
Percentage of AvailableForSaleSecuritiesDebtSecurities0.40.3

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel1, us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value10210410967
Percentage of AvailableForSaleSecuritiesDebtSecurities0.90.90.90.6

us-gaap:FairValueInputsLevel2, cinf:ForeignGovernment, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value2810
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.1

us-gaap:FairValueInputsLevel2, us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value284301305288
Percentage of AvailableForSaleSecuritiesDebtSecurities2.52.62.62.7

us-gaap:FairValueInputsLevel2, us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6133640164105709
Percentage of AvailableForSaleSecuritiesDebtSecurities54.154.755.353.4

us-gaap:FairValueInputsLevel2, us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value23282410
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.20.20.1

us-gaap:FairValueInputsLevel2, us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value87136162310
Percentage of AvailableForSaleSecuritiesDebtSecurities0.81.21.42.9

us-gaap:FairValueInputsLevel2, us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value4711472845904300
Percentage of AvailableForSaleSecuritiesDebtSecurities41.540.439.640.2

us-gaap:FairValueInputsLevel3, us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.00.00.01000000.0
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0004
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel1, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value10210410967
Percentage of AvailableForSaleSecuritiesDebtSecurities0.90.90.90.6

us-gaap:FairValueInputsLevel2, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value11238115941149110617
Percentage of AvailableForSaleSecuritiesDebtSecurities99.199.199.199.3

us-gaap:FairValueInputsLevel3, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value0005
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

cinf:ForeignGovernment, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value2810
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.1

us-gaap:CommercialMortgageBackedSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value284301305288
Percentage of AvailableForSaleSecuritiesDebtSecurities2.52.62.62.7

us-gaap:CorporateBondSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6133640164105710
Percentage of AvailableForSaleSecuritiesDebtSecurities54.154.755.353.4

us-gaap:ForeignGovernmentDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value23282410
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.20.20.1

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value10210410967
Percentage of AvailableForSaleSecuritiesDebtSecurities0.90.90.90.6

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value87136162310
Percentage of AvailableForSaleSecuritiesDebtSecurities0.81.21.42.9

us-gaap:USStatesAndPoliticalSubdivisions, us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value4711472845904304
Percentage of AvailableForSaleSecuritiesDebtSecurities41.540.439.640.3

us-gaap:InvestmentType

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value11340116981160010689
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesEquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value62257752717670126571592066636200608662496025579956765334530452424941470645264734478948584666460544264375398438753801337333493139313129562609297131003041275726112701
Percentage of AvailableForSaleSecuritiesEquitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value30692234
Percentage of AvailableForSaleSecuritiesEquitySecurities39.637.7

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel1, us-gaap:CommonStock, us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6017751869565742
Percentage of AvailableForSaleSecuritiesEquitySecurities96.797.096.997.0

us-gaap:FairValueInputsLevel2, us-gaap:PreferredStock, us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value208234220178
Percentage of AvailableForSaleSecuritiesEquitySecurities3.33.03.13.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:CommonStock, us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value6017751869565742
Percentage of AvailableForSaleSecuritiesEquitySecurities96.797.096.997.0

us-gaap:PreferredStock, us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302018-12-31
Value208234220178
Percentage of AvailableForSaleSecuritiesEquitySecurities3.33.03.13.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312018-12-31
Value486767784
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0

us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:NewAccountingPronouncementEarlyAdoption, us-gaap:StatementEquityComponents

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption

us-gaap:AccountingStandardsUpdate201802, us-gaap:NewAccountingPronouncementEarlyAdoptionEffect, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312018-12-312017-12-31
Value00492
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption0.00.0100.0

us-gaap:AccountingStandardsUpdate201802, us-gaap:NewAccountingPronouncementEarlyAdoptionEffect, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312017-12-31
Value00492
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption0.00.0100.0

us-gaap:AccountingStandardsUpdate201802, us-gaap:NewAccountingPronouncementEarlyAdoptionEffect, us-gaap:RetainedEarnings



Period End2019-12-312018-12-312017-12-31
Value00-492
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption0.00.0-100.0

us-gaap:DebtInstrumentFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1175109110951049101097597110191011104010131015997976101810369979711008100010511028100210001025991100410081068104510341003954814815799783
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1175109110951049101097597110191011104010131015997976101810369979711008100010511028100210001025991100410081068104510341003954918
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0112.8

us-gaap:DeferredIncomeTaxLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value66013079729328178257976506529951087102194612798798447511047596717824840777810721673542512588453453359388314191324296260247152
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value345198
Percentage of DeferredIncomeTaxLiabilities26.424.0

us-gaap:DeferredPolicyAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value827774783786751738743728691670676678660637627624618616609600571578590571564565576546491470491484483510512511503488469485485481509
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value536512525526485464476472446438408
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value39332752424146394634
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6660123199191197206202201182
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value113105100158151145137124113107
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value139131123195187183178163167157
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Period End2019-12-312018-12-312017-12-312016-12-31
Value2318100
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value327297322309293284257282236213
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value916122642361810188636652
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
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Period End2019-12-312018-12-312017-12-312016-12-31
Value24181718
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
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Period End2019-12-312018-12-312015-12-312014-12-312013-12-312012-12-31
Value400040
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us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

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Period End2019-12-312018-12-31
Value0.0340.0434
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Period End2019-12-312018-12-31
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value350318351340323319284320281245221
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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value354318345315278288280238216183144
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Period End2019-12-312018-12-31
Value2737
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Period End2019-12-312018-12-31
Value255
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Period End2019-12-312018-12-31
Value2529
Percentage of DefinedBenefitPlanFairValueOfPlanAssets7.19.1

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Period End2019-12-312018-12-31
Value2737
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Period End2019-12-312018-12-31
Value255
Percentage of DefinedBenefitPlanFairValueOfPlanAssets7.11.6

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Period End2019-12-312018-12-31
Value2529
Percentage of DefinedBenefitPlanFairValueOfPlanAssets7.19.1

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Period End2019-12-312018-12-31
Value285220
Percentage of DefinedBenefitPlanFairValueOfPlanAssets80.569.2

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Period End2019-12-312018-12-31
Value255
Percentage of DefinedBenefitPlanFairValueOfPlanAssets7.11.6

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Period End2019-12-312018-12-31
Value260215
Percentage of DefinedBenefitPlanFairValueOfPlanAssets73.467.6

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Period End2019-12-312018-12-31
Value5266
Percentage of DefinedBenefitPlanFairValueOfPlanAssets14.720.8

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Period End2019-12-312018-12-31
Value5266
Percentage of DefinedBenefitPlanFairValueOfPlanAssets14.720.8

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Period End2019-12-312018-12-31
Value337286
Percentage of DefinedBenefitPlanFairValueOfPlanAssets95.289.9

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Period End2019-12-312018-12-31
Value1732
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4.810.1

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Period End2019-12-312018-12-31
Value7771
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21.822.3

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Period End2019-12-312018-12-31
Value260215
Percentage of DefinedBenefitPlanFairValueOfPlanAssets73.467.6

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value40-6-25-45-31-4-82-65-62
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2019-12-31
Value0.08
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0

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Period End2019-12-31
Value0.07
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations87.5

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Period End2019-12-31
Value0.08
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0

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Period End2019-12-31
Value0.1
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations125.0

cinf:ConsumerDiscretionarySectorMemberDomain, us-gaap:EquitySecurities



Period End2019-12-31
Value0.11
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations137.5

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Period End2019-12-31
Value0.13
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations162.5

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Period End2019-12-31
Value0.21
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations262.5

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Period End2019-12-31
Value0.23
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations287.5

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Period End2019-12-31
Value0.13
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations162.5

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Period End2019-12-31
Value0.77
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations962.5

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Period End2019-12-312018-12-31
Value9186
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0

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srt:ParentCompany



Period End2019-12-312018-12-31
Value107106
Percentage of DueFromAffiliates100.0100.0

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srt:ParentCompany



Period End2019-12-312018-12-31
Value74246152
Percentage of EquityMethodInvestments100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1787619746190591860317864167321743316944167211705116664163941606715500156421545914889144231442614551144761438614255140601367813564130901293313037125341253312231121531180111529117571170411508113051103210643
Percentage of Investments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2019-12-312018-12-31
Value32212305
Percentage of Investments16.313.8

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value18448203501968919223184511743418143176501744117774173781709916768161931633816158156031511415131152361515415067148991472414323141921372313571136861316412371
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value6157766771106964651958436556608159626101585456245496515751055044474645104337452946244704451244714281423438923779369432552869
Percentage of InvestmentsFairValueDisclosure33.437.736.136.235.333.536.134.534.234.333.732.932.831.831.231.230.429.828.729.730.531.230.330.429.929.828.427.827.024.723.2

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
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Percentage of InvestmentsFairValueDisclosure66.662.363.963.764.666.563.865.565.865.666.367.167.267.768.568.569.269.871.170.169.368.669.569.670.070.171.672.173.075.276.6

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value00055555566617842535455432121203011154566525
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9539829999839469279549619881044105510521047104510991148112910941100113811341114112411291112113010991114113311381118104810691002923968933
Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value752770787778751742760769788834846846844839881928917886
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value201212212205195185194192200210209206203206218220212208
Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure21.121.621.220.920.620.020.320.020.220.119.819.619.419.719.819.218.819.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value752770787778751742760769788834846846844839881928917886
Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure78.978.478.879.179.480.079.780.079.879.980.280.480.680.380.280.881.281.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value201212212205195185194192200210209206203206218220212208
Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure21.121.621.220.920.620.020.320.020.220.119.819.619.419.719.819.218.819.0

us-gaap:FairValueByFairValueHierarchyLevel

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
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Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure21.121.621.220.920.620.020.320.020.220.119.819.619.419.719.819.218.819.018.919.919.819.519.619.319.119.419.820.420.721.120.920.421.020.8

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value752770787778751742760769788834846846844839881928917886892912909897904911900911881887898898884834845794
Percentage of LiabilitiesRelatedToInvestmentContractsFairValueDisclosure78.978.478.879.179.480.079.780.079.879.980.280.480.680.380.280.881.281.081.180.180.280.580.480.780.980.680.279.679.378.979.179.679.079.2

us-gaap:LiabilityForAsbestosAndEnvironmentalClaimsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8589848584817767136134
Percentage of LiabilityForAsbestosAndEnvironmentalClaimsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value615360885997595458865646552954235293521953005213512850354937491847504660465346474577443843934408432342414238421941694280
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

cinf:LifeandHealthLossReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value53595955586149455254506849505452545847444647
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense0.91.01.00.91.01.10.90.81.01.00.91.31.01.01.11.11.11.21.00.91.01.1

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

cinf:CommercialAutoSegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value654637595521
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense10.711.311.410.3

cinf:CommercialCasualtySegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value2165215819871957
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense35.638.238.138.9

cinf:CommercialPropertySegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value394314277306
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense6.55.65.36.1

cinf:HomeOwnerSegment, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value181175114134
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense3.03.12.22.7

cinf:PersonalAuto, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value313324307280
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense5.15.75.95.6

cinf:WorkersCompensation, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value9879919921001
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense16.217.619.019.9

us-gaap:StatementBusinessSegments

cinf:ExcessandSurplusLinesInsurance



Period End2019-12-312018-12-312017-12-312016-12-31
Value334284343229
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense5.55.06.64.5

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value62066147605660095944570755785468534552735350528151775085499149704804471847004691462344854435444443754311430742844240423043444396434743394521453542394200422541844142
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

cinf:DeferredAnnuitiesAndStructuredSettlements



Period End2019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value1511561611611631641661701701731751741771791811821841841051105110491049104610431025
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability2.52.73.03.13.03.13.23.33.43.53.63.73.83.83.94.14.14.124.024.424.424.524.724.723.6

us-gaap:InvestmentType

us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts

cinf:DeferredAnnuitiesAndStructuredSettlements



Period End2019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value760787821835844851858861864863860860864863863863864865862
Percentage of LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForFuturePolicyBenefitsLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value28612835281627982784277927702760274027292716270226892671264126242601258325642543251424972484245424352390237323452310229522852256224022142179214821062034196819261783
Percentage of LiabilityForFuturePolicyBenefitsLife100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesByIndustry

cinf:Investmentcontractreserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value15661559156115621568158215901594159516021607161116181615160516051596
Percentage of LiabilityForFuturePolicyBenefitsLife54.755.055.455.856.356.957.457.858.258.759.259.660.260.560.861.261.8

cinf:LifePolicyReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1295127612551236121611971180116611451127110910911071105610361019987
Percentage of LiabilityForFuturePolicyBenefitsLife45.345.044.644.243.743.142.642.241.841.340.840.439.839.539.238.838.2

us-gaap:ProductOrService, us-gaap:EquitySecuritiesByIndustry

cinf:DeferredAnnuities, cinf:Investmentcontractreserves



Period End2020-03-312019-12-312019-09-302018-12-31
Value754760768787
Percentage of LiabilityForFuturePolicyBenefitsLife26.426.827.328.3

cinf:IndividualOrdinaryLifeInsurance, cinf:LifePolicyReserves



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value12451226120611871149
Percentage of LiabilityForFuturePolicyBenefitsLife43.543.242.842.441.3

cinf:OtherInvestmentContractReserves, cinf:Investmentcontractreserves



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value88667
Percentage of LiabilityForFuturePolicyBenefitsLife0.30.30.20.20.3

cinf:OtherLifePolicyReserves, cinf:LifePolicyReserves



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value5050494948
Percentage of LiabilityForFuturePolicyBenefitsLife1.71.81.71.81.7

cinf:StructuredSettlements, cinf:Investmentcontractreserves



Period End2019-12-312018-12-31
Value151156
Percentage of LiabilityForFuturePolicyBenefitsLife5.35.6

us-gaap:StructuredSettlementAnnuity, cinf:Investmentcontractreserves



Period End2020-03-312019-12-312019-09-302018-12-31
Value151151152156
Percentage of LiabilityForFuturePolicyBenefitsLife5.35.35.45.6

us-gaap:UniversalLife, cinf:Investmentcontractreserves



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value653640635633632
Percentage of LiabilityForFuturePolicyBenefitsLife22.822.622.522.622.7

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value5859574657195685562054085343523551095032502049304831473746364608447843794364435542994156410941264034394239173886382438133937400539373905401339713853381138473820372236613498
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312012-12-312011-12-312010-12-31
Value300225225225225225225225
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableNetReportedAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value7677787672716966616156545051535860626568707577808385797976757678767675757673717275
Percentage of LoansAndLeasesReceivableNetReportedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

cinf:LifePolicyLoans



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3233313131313435363535363737
Percentage of LoansAndLeasesReceivableNetReportedAmount41.646.550.860.850.041.342.542.242.444.344.347.449.348.7

us-gaap:PolicyLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value333232333233323231313131303130303031323130313036
Percentage of LoansAndLeasesReceivableNetReportedAmount43.441.641.043.444.446.546.448.550.850.855.457.460.060.856.651.750.050.049.245.642.941.339.042.4

us-gaap:LoansReceivableFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value50444342414040404041414140404142424040413939394344454446485043
Percentage of LoansReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value50444342414040404041414140404142424040413939394344454446485043
Percentage of LoansReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value846846847847845834830828829827826826825826827825825821826823825827829831834835832833831827828831833821807
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

us-gaap:LongTermDebtFairValue

cinf:SeniorDebentures692PercentDue2028



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value525506512502486471472478490505503506497488511516492480498487508496482485470458470469504479
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:SeniorDebentures69PercentDue2028



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value353435343332323233343434333335353331343435343334323032333231
Percentage of LongTermDebtFairValue6.76.76.86.86.86.86.86.76.76.76.86.76.66.86.86.86.76.56.87.06.96.96.87.06.86.66.87.06.36.5

cinf:SeniorNotes6125PercentDue2034



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value501512510476459440437448464477459458450435452457437425441430459449438432419399398402428431
Percentage of LongTermDebtFairValue95.4101.299.694.894.493.492.693.794.794.591.390.590.589.188.588.688.888.588.688.390.490.590.989.189.187.184.785.784.990.0

us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

cinf:SeniorDebentures692PercentDue2028, us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value525506512502486471472478490505503506497488511516492480498487508496482485470458470469504479
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cinf:SeniorDebentures69PercentDue2028, us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value353435343332323233343434333335353331343435343334323032333231
Percentage of LongTermDebtFairValue6.76.76.86.86.86.86.86.76.76.76.86.76.66.86.86.86.76.56.87.06.96.96.87.06.86.66.87.06.36.5

cinf:SeniorNotes6125PercentDue2034, us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value501512510476459440437448464477459458450435452457437425441430459449438432419399398402428431
Percentage of LongTermDebtFairValue95.4101.299.694.894.493.492.693.794.794.591.390.590.589.188.588.688.888.588.688.390.490.590.989.189.187.184.785.784.990.0

us-gaap:NotesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1143938373232306124241717172020283535354949494949104104104104104104104104104104104494949494949
Percentage of NotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesPayableFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1143938373232306124241717172020283535354949494949104104104104104104104104104104
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1143938373232306124241717172020283535354949494949104104104104104104104104104104
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NumberOfStatesInWhichEntityOperates



Period End2019-12-31
Value45.0
Percentage of NumberOfStatesInWhichEntityOperates100.0

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value38838140237534030832719919221620417117019820019513515477596375699879735494576147179979314216166671769045
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value6148
Percentage of OtherAssets16.015.6

us-gaap:OtherInvestmentNotReadilyMarketableFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value384545433834373334313028272424232221
Percentage of OtherInvestmentNotReadilyMarketableFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value384545433834373334313028272424232221
Percentage of OtherInvestmentNotReadilyMarketableFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:EquityFunds



Period End2019-12-312018-12-31
Value4534
Percentage of OtherInvestmentNotReadilyMarketableFairValue100.0100.0

us-gaap:FinancialInstrument

us-gaap:EquityFunds



Period End2019-12-312018-12-31
Value4534
Percentage of OtherInvestmentNotReadilyMarketableFairValue100.0100.0

us-gaap:FinancialInstrument, us-gaap:RetirementPlanName

us-gaap:EquityFunds, cinf:TopHat



Period End2019-12-312018-12-31
Value4534
Percentage of OtherInvestmentNotReadilyMarketableFairValue100.0100.0

us-gaap:OtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value31129628327127112311010810710399939081817964676967666867727268686667686867666666696884828281
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value10336
Percentage of OtherInvestments34.829.3

us-gaap:InvestmentType

cinf:LifePolicyLoans



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value323331313131363737
Percentage of OtherInvestments10.826.830.138.346.345.652.954.456.1

us-gaap:OtherThanSecuritiesInvestment



Period End2019-12-31
Value164
Percentage of OtherInvestments55.4

us-gaap:RealEstateInvestment



Period End2019-12-312018-12-312017-12-312016-12-31
Value29303727
Percentage of OtherInvestments9.824.435.933.3

us-gaap:VentureCapitalFunds



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value716035233637323129
Percentage of OtherInvestments24.048.834.028.453.754.447.145.643.9

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value858928905828752804755707672792800767691786798743675717692635581648666563545611639597578660573539537517519512555556560578670
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-31
Value7259
Percentage of OtherLiabilities7.87.3

us-gaap:PremiumsReceivableAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1900177718391913178516441709173316261589164016511588153315181529146814311494150914331405144714621396134613931350129112141247121011261087110711061062101510351055995
Percentage of PremiumsReceivableAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidReinsurancePremiums



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5754607050444439394244485262687350542928292928262726262626262624242415151618171615
Percentage of PrepaidReinsurancePremiums100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

us-gaap:PrepaidTaxes

srt:ParentCompany



Period End2019-12-312018-12-31
Value21
Percentage of PrepaidTaxes100.0100.0

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value294342278269266238186188184187280283297298301310272281289292278282299
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

cinf:CommercialAutoSegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value5545
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments1.52.12.11.7

cinf:CommercialCasualtySegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value305143137
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments8.821.423.046.0

cinf:CommercialPropertySegment, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value1110718
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments32.50.03.76.0

cinf:HomeOwnerSegment, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value213232
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments6.113.41.60.7

cinf:PersonalAuto, us-gaap:PropertyAndCasualtyPersonalInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value33343131
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments9.614.316.610.4

cinf:WorkersCompensation, us-gaap:PropertyAndCasualtyCommercialInsuranceProductLine



Period End2019-12-312018-12-312017-12-312016-12-31
Value64596475
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments18.724.834.225.2

us-gaap:StatementBusinessSegments

cinf:ExcessandSurplusLinesInsurance



Period End2019-12-312018-12-312017-12-312016-12-31
Value8736
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments2.32.91.62.0

us-gaap:ReinsuranceRecoverables



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value610524515527484424420423432522532544545552557532542552535539545549526546547584582620615589575602622714753573572554543675
Percentage of ReinsuranceRecoverables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuritiesHeldAsCollateralAtFairValue



Period End2019-12-312018-12-312017-12-312016-12-31
Value95755722
Percentage of SecuritiesHeldAsCollateralAtFairValue100.0100.0100.0100.0

us-gaap:SeparateAccountAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value858882878859831803795792803806798790775766790797773748773742764752730731725692700713726734715698686671665657630621648626585
Percentage of SeparateAccountAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel2, cinf:TaxableFixedMaturities



Period End2020-03-312019-12-312019-09-302018-12-31
Value845855868791
Percentage of SeparateAccountAssets98.596.998.998.5

us-gaap:InvestmentType

cinf:TaxableFixedMaturities



Period End2020-03-312019-12-312019-09-302018-12-31
Value845855868791
Percentage of SeparateAccountAssets98.596.998.998.5

us-gaap:SeparateAccountsLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value858882878859831803795792803806798790775766790797773748773742764752730731725692700713726734715698686671665657630621648626585
Percentage of SeparateAccountsLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType, cinf:ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAward

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

cinf:ServiceBasedShares, us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-31
Value783000.0813000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0

us-gaap:PerformanceShares, us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-31
Value165000.0182000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber21.122.4