UNM


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:ConsolidationItems

us-gaap:PremiumsEarnedNet

us-gaap:NetInvestmentIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:PolicyholderBenefitsAndClaimsIncurredNet

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:Cash

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:LongTermDebtCurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:RepaymentsOfLongTermDebt

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease
us-gaap:ConsolidationItems
unm:AdjustedOperatingRevenue
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

unm:ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit

unm:ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

unm:InvestmentIncomeOnPfaAssets

unm:NotionalAmountOfDerivativesAdditions
us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType

unm:NotionalAmountOfDerivativesForeignCurrency
us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk

unm:NotionalAmountOfDerivativesTerminations
us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType

unm:OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentNetOfTax

unm:OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentTax

unm:OtherInvestmentsGrossRealizedGains

unm:OtherInvestmentsGrossRealizedLosses

unm:TaxBenefitsfromLowIncomeHousingInvestments

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses

us-gaap:BenefitsLossesAndExpenses

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CurrentIncomeTaxExpenseBenefit

us-gaap:DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType, us-gaap:SubsequentEventType, unm:AnnuityContract
us-gaap:DefinedBenefitPlanBenefitObligationBenefitsPaid
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:StatementEquityComponents
us-gaap:DividendsCash

us-gaap:EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet
us-gaap:FairValueByAssetClass
us-gaap:FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

us-gaap:GainLossOnInvestments
us-gaap:ConsolidationItems
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedInvestmentIncomeReceivable

us-gaap:IncreaseDecreaseInCashCollateralForLoanedSecurities

us-gaap:IncreaseDecreaseInDeferredPolicyAcquisitionCosts

us-gaap:IncreaseDecreaseInInsuranceLiabilities

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities

us-gaap:IncreaseDecreaseInReceivables

us-gaap:InsuranceCommissions

us-gaap:InterestAndDebtExpense
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InvestmentIncomeInterestAndDividend
us-gaap:InvestmentType

us-gaap:InvestmentIncomeInvestmentExpense

us-gaap:LaborAndRelatedExpense

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1
us-gaap:NatureOfExpense
us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1
us-gaap:ConsolidationItems
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
unm:ComponentOfNetUnrealizedGainOnSecurities
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherCostAndExpenseOperating
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

us-gaap:PaymentsForLossesAndLossAdjustmentExpense

us-gaap:PaymentsForProceedsFromShortTermInvestments

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense
unm:NatureofClaimIncurred
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

unm:AccidentAndHealthActiveLifeReserves

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedGainPositionGrossGain

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedLossPositionGrossLoss

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedGainPositionGrossGain

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedLossPositionGrossLoss

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedGainPositionGrossGain

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedLossPositionGrossLoss

unm:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
unm:AvailableForSaleSecuritiesDebtMaturitiesFairValueGrossSubtotal

unm:AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGainGrossSubtotal

unm:AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossLossGrossSubtotal

unm:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedGainPositionGrossGain

unm:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedLossPositionGrossLoss

unm:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedGainPositionGrossGain

unm:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedLossPositionGrossLoss
unm:HeirarchyLevelCombination
unm:AvailableForSaleSecuritiesPercentOfTotalFairValue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, unm:FairValueAssetsAndLiabilitiesComponents

unm:AvailableForSaleSecuritiesUnrealizedLossPositionGrossLossSubtotal

unm:AvailableforsaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGain
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
unm:DebtSecuritiesAvailableforsalePrivate
us-gaap:FairValueByMeasurementFrequency
unm:FinancialInstrumentsFinancialAssetsFairValueDisclosureCarryingValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
unm:FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal
us-gaap:FairValueByMeasurementFrequency
us-gaap:ExternalCreditRatingByGrouping
unm:FixedMaturitySecuritiesInUnrealizedLossPositionPercentOfTotal

unm:LifeReservesForFuturePolicyAndContractBenefits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
unm:MiscellaneousLongTermInvestments
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
unm:MiscellaneousLongTermInvestmentsCarryingValue
us-gaap:ExternalCreditRatingByGrouping
unm:NumberOfFixedMaturitySecuritiesInUnrealizedLossPositionContinuouslyForOverOneYear
us-gaap:InternalCreditAssessment
unm:PercentageOfLoanPortfolio
us-gaap:LoanToValue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:StatementGeographical

unm:PolicyAndContractBenefits

unm:PolicyLoansCededtoReinsurers
us-gaap:FairValueByMeasurementFrequency
unm:TotalFinancialInstrumentLiabilitiesNotCarriedatFairValue

unm:UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AccountsAndFinancingReceivableAllowanceForCreditLoss

us-gaap:AccountsReceivableNet

us-gaap:AccruedInvestmentIncomeReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
unm:ComponentOfNetUnrealizedGainOnSecurities
us-gaap:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AdvancesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:AllowanceForLoanAndLeaseLossesRealEstate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:AlternativeInvestment
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, unm:PrivateEquityFundType
us-gaap:FinancialInstrument, unm:PrivateEquityFundType, unm:RedemptionTerm

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:ExternalCreditRatingByGrouping
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:ExternalCreditRatingByGrouping
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:ExternalCreditRatingByGrouping
us-gaap:AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

us-gaap:CollateralizedFinancings

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:FinancialInstrument
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:DebtSecuritiesAvailableForSaleMeasurementInput

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:DeferredPolicyAcquisitionCosts

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross

us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:DerivativeCollateralObligationToReturnCash
us-gaap:FinancialInstrument

us-gaap:DerivativeCollateralObligationToReturnSecurities
us-gaap:FinancialInstrument
us-gaap:TransactionType
us-gaap:DerivativeCollateralRightToReclaimSecurities

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation
us-gaap:TransactionType
us-gaap:TransactionType
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:TransactionType

us-gaap:DerivativeNetLiabilityPositionAggregateFairValue

us-gaap:DerivativeNotionalAmount
us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk
us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:ValuationTechnique
us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability

us-gaap:EquitySecuritiesFvNi
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique
unm:CreditExposure
us-gaap:FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets
us-gaap:FinancialInstrument
us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
us-gaap:FinancialInstrument, unm:PrivateEquityFundType
us-gaap:FinancialInstrument, unm:PrivateEquityFundType, unm:RedemptionTerm
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
us-gaap:FinancialInstrument

us-gaap:FederalHomeLoanBankStock
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, unm:FinancingReceivableOriginationPeriod
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:HedgedAssetFairValueHedge
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:HedgedLiabilityFairValueHedge
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

us-gaap:Investments

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense

us-gaap:LiabilityForFuturePolicyBenefits

us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

us-gaap:LoansInsurancePolicy
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:FairValueByMeasurementFrequency

us-gaap:MortgageLoansOnRealEstateCommercialAndConsumerNet
unm:FinancingReceivableOriginationPeriod
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:FairValueByMeasurementFrequency
us-gaap:InternalCreditAssessment
us-gaap:LoanToValue
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:StatementGeographical
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:MortgagesHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:NotesPayableFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:NotesReceivableGross
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:OtherAssets

us-gaap:OtherLiabilities
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:OtherLongTermInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherPolicyholderFunds

us-gaap:OtherShortTermInvestments

us-gaap:PremiumsAndOtherReceivablesNet
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:PremiumsReceivableGross

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:ReinsuranceReceivablesIncurredButNotReportedClaims

us-gaap:ReinsuranceRecoverables
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:ReinsuranceRecoverablesAllowance

us-gaap:SecuritiesBorrowed

us-gaap:SecuritiesBorrowedCollateralObligationToReturnCash

us-gaap:SecuritiesBorrowedCollateralObligationToReturnSecurities

us-gaap:SecuritiesBorrowedGross
us-gaap:BalanceSheetLocation
us-gaap:SecuritiesReceivedAsCollateral

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:TaxesPayableCurrentAndNoncurrent

us-gaap:TreasuryStockShares

us-gaap:UnearnedPremiums

us-gaap:VariableInterestEntityNonconsolidatedCarryingAmountAssets
us-gaap:VariableInterestEntitiesByClassificationOfEntity

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██████████▇▇▇▇▇█████303030303030303030303030303030303030303030303636363636363636363635353535353636363636NANANA
us-gaap:CommonStockSharesIssued ▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███████▇▇▇▇▇▇▇▇█████306305305305305305305305304304304304303303303303303302302302302301361361361360360360360359359359359358358358358364364364364363NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 203NA208211214NA218221222NA226228230NA234237239NA246249252NA254257260NA264266270NA278283291NA299307314NA324332333NA332331NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 203NA208211214NA218220221NA225227229NA233236239NA245248251NA253256259NA262265269NA278283290NA298306312NA323331332NA331331NA
us-gaap:EarningsPerShareBasic ▆█▇██▇▁█▇▇▇▇▇▇▇▇▇▇▇▇▇▂▇▇▇▇▆▆▆▇▇▆▆▁▆▆▆▆▆▆▆▆▆▆▆0.791.441.161.331.311.15-1.31.291.231.191.121.081.01.071.011.00.880.930.830.90.85-1.110.870.940.880.850.780.820.790.860.830.760.74-1.450.690.750.720.710.680.630.690.60.670.810.5
us-gaap:EarningsPerShareDiluted ▆█▇██▇▁█▇▇▇▇▇▇▇▇▇▇▇▇▇▂▇▇▇▇▆▆▆▇▇▆▆▁▆▆▆▆▆▆▆▆▆▆▆0.791.441.161.331.311.15-1.31.291.231.191.121.071.01.071.011.00.880.930.830.90.84-1.110.870.940.880.840.780.820.790.850.830.760.73-1.450.690.750.720.710.680.630.690.60.660.80.5
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Revenues ▆█▇█▇▆▇▆▆▆▅▅▅▅▅▅▄▄▃▄▃▃▃▃▃▃▂▃▃▄▃▃▃▃▂▂▂▃▂▂▂▂▂▃▁287130342960301629872880292728902899283928192822280627962763276127252722265727032647263526092653261125862540260126242658262826172611260425452564256325932527251025612496251726282448
 us-gaap:Revenues us-gaap:ConsolidationItems us-gaap:OperatingSegments▆█▇█▇▆▆▆▆▅▅▅▅▅▄▄▄▄▃▃▃▂▂▃▂▂▁287130342960301629872880292728902899283928192822280627962763276127252722265727032647263526092656261425862540NANANANANANANANANANANANANANANANANANA
us-gaap:PremiumsEarnedNet ██▇██▇▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁237123522331234323382263225122212250215821532142214220992089208120872037202020172006196719471943193818901897190519301937192919271921188818811875186918681850184918631865186118751872
us-gaap:NetInvestmentIncome ▂▅▄▆▃▄▆▆▄▆▅▆▄▅▅▆▄▇▅▇▄▇▄▇▅▇▅▆▆█▆▇▆▇▇▇▆▇▆▇▅▃▂▃▁585616599624594608619623602619609620602617611623606636612630602629606629612629615626621643619633619634629637618634618629613595579597573
 us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems us-gaap:OperatingSegments▁▅▃▆▂▄▆▆▃▆▄▆▃▅▅▆▄█▅▇▃▇▄▇▅▇▅585616599624594608619623602619609620602617611623606636612630602629606632615629615NANANANANANANANANANANANANANANANANANA
 us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:ClosedBlock▅█▆█▆▆▇▆▅▅▅▅▄▆▄▅▄▅▃▄▂▂▁▃▁▃▁336356347354346345348345337341337340335343334341333340327331320323317325315327315NANANANANANANANANANANANANANANANANANA
 us-gaap:NetInvestmentIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:UnumUs▁▂▂▂▁▂▄▃▃▄▄▄▄▄▅▅▅▆▆▆▆▇▆▆▇▇█179189184184182187200196194202201205202206207207207220214215215226216218223229233NANANANANANANANANANANANANANANANANANA
 us-gaap:NetInvestmentIncome us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship,us-gaap:HedgingDesignation,us-gaap:IncomeStatementLocation us-gaap:InterestRateSwap,us-gaap:CashFlowHedging,us-gaap:DesignatedAsHedgingInstrument,us-gaap:InvestmentIncome▂▁▃▃▂▇▃▄▅▆▆██73727475738075767778798181NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherIncome █▇▆▇▅▃▃▂▃▃▁▄▃▄▄▄▄▃▄▆▆▆▆▆▅58565556535050484949465150515151525051545455545453NA545662NA585857NA5956596358605961616767
 us-gaap:OtherIncome us-gaap:ConsolidationItems us-gaap:OperatingSegments█▇▆▇▅▃▃▂▃▃▁▄▃▄▄▄▄▃▄▆▆▆▆▆▅▇▆585655565350504849494651505151515250515454555454535654NANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:ClosedBlock▃▂▃▁▃▃▃▃▄▄▃▄▄▄▅▅▆▅▅▆▇▆▇█▅▆▇181718161818181819191820202021212221212223222324212223NANANANANANANANANANANANANANANANANANA
 us-gaap:OtherIncome us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:UnumUs█▆▅▆▅▃▃▂▂▂▁▃▂▂▂▂▂▂▂▄▃▃▃▃▃▂▃403634363430302829272630282728272928283130303030302930NANANANANANANANANANANANANANANANANANA
us-gaap:PolicyholderBenefitsAndClaimsIncurredNet ▃▃▃▃▃▂█▂▂▂▂▂▂▂▂▂▂▂▁▂▁▆▁▁▁1854188118711902184018292578180418071789176517521749173517421733172917351690170216532372165316531631NA164116611648NA168616831662NA16351599159316181587157915681566156515841575
us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense █▄▅▆▇▄▄▄▆▃▃▄▄▂▂▃▄▁▂▃▄▁▁▁▂176141146151170136136140151123123138141115118126132106117124134107107106118NA98101123NA879999NA125136138139130135141131130132131
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▇█▇██▇▃█████▇███▇▇▇▇▇▃▇█▇▇▇▇▇▇▇▇▇▁▇█▇█▇▇█▇██▇202377299352353309-377354341345366361330371332340304316298319303-457312346326305284311303322320296310-704293338330335326308361295334411250
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems us-gaap:OperatingSegments▇█▇██▇▂█████████▇▇▇█▇▁▇██▇▇202377299352353309-377354341345366361330371332340304316298319303-457312349329305284NANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▆▇▆▇▇▇▃▇▇▇██▇█▇█▇▇▇▇▇▁▇█▇418157707260-93696778114116100123961039390959590-1789110497NA789291NA908096NA87108104109105981319611314485
us-gaap:NetIncomeLoss ▇█▇███▂█████▇█▇▇▇▇▇▇▇▂▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇█▇161296242281280249-284285273266252245229248236236210226203224212-279221242228221205218212233230216213-425205229225225220209229199221267164
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆█▇██▇▁███▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇161296242281280249-284285273266252245229248236236210226203224212-290221242228NA205218212NA230216213NANANA225225220209229199221267164
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ▇██▇▆▅▅▅▆▆▆▆▅▅▆▆▅▄▅▅▆▅▅▅▅▄▄▄▅▅▅▄▄▄▄▃▂▃▄▂▁▁653356701366955658436392161875622496236663012640136380563381625246194163905638536196760589615036170663014624976196062218610785940359585593666161162236621196067859571601796004058015571165730759054567925499754477NANANA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:ClosedBlock▆██▇▅▄▃▃▄▅▄▄▃▂▄▄▂▁▂▂▄▃▁3600437008369063619635542345273436034063346033505134717344663388233734348213455933549329923343133418344623396033151NANA31564NANANANANANANANANANANANANANANANANANANA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,unm:UnumUs▃▇▇▆▃▂▁▃▄▅▄▅▅▄▆▆▄▅▇▇█▇▇1779118586186171843817802175101729717641180361810918069182321811118036184651831017963182421863018644188651867618672NANA18384NANANANANANANANANANANANANANANANANANANA
us-gaap:Liabilities ▇██▇▆▅▆▅▆▆▆▆▆▅▆▆▅▅▅▅▆▆▅▅▅▄▄▄▅▆▆▅▄▄▄▃▂▂▄▂▁▁555325704857324563905486153253537315292053512544385435754065534175297354543546965304751925529225319154326539445271652974521225074450915509855305353623534465229251391516025058048933481334836350130479204621745976NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇██▇▆▅▅▅▆▆▆▆▅▅▆▆▅▄▅▅▆▅▅▅▅▄▄▄▅▅▅▄▄▄▄▃▂▃▄▂▁▁653356701366955658436392161875622496236663012640136380563381625246194163905638536196760589615036170663014624976196062218610785940359585593666161162236621196067859571601796004058015571165730759054567925499754477NANANA
us-gaap:StockholdersEquity ██▇▇▆▅▅▇▇▇▇▇▆▆▇▆▆▅▅▅▅▅▇▇▆▅▅▅▅▅▅▅▄▅▇▆▆▆▆▆▆▅▅▃▁980399659631945390608621851894469499957494489316910789689361915789208663858185158687855292449243895586598669838085578612867383858179857794609082898389448924887187808500824374786422
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁█████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆235723482342233523282321231423082302230322952282227722722263225822532247223922352230222126512646264026342623261926132607260426002600259125802577257226152611260726032587257825642553
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings███▇▇▇▆▇▇▆▆▆▅▅▅▅▄▄▄▄▃▃▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁108121072810491103081008398639670100129777954293279126892787448542835381607995781476567472733286588478827380837899773275487371717369796793703174877313711270606864667364916289611759235667
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Cash █▂▂▂▂▂▅▂▇▂▂▃▃▂▂▂▃▃▃▃▂▂▂▃▂▂▂▁▂▂▁▁▂▃▁▂▁▁▂▂▁▂▅▁▁3378477606294214993087770117107100879312011210912284102601127694634710277533810211652715653788151712204850
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PropertyPlantAndEquipmentNet ▆▆█▇▇▇▅▅▅▄▄▄▄▄▅▅▅▅▆▆▆▆▆▆▅▅▅▄▄▄▄▄▄▄▄▃▃▃▂▂▁▁540534568556548546521510508504489497501500509510515523529535537531531528519511508504499501497492497493492487482476467454447443NANANA
us-gaap:Goodwill █████████▇▇▇▇▇▇▂▂▂▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁348351348350351350346346348338338337335335336226229230232198198198200201201200201201200201201201201201201201201201201200200201NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LongTermDebtCurrent ▄▄399399NANANA0NANANA199NANANA0NANANA352NANANA151NANANA0NANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ██▇▇▆▅▅▇▇▇▇▇▆▆▇▆▆▅▅▅▅▅▇▇▆▅▅▅▅▅▅▅▄▅▇▆▆▆▆▆▆▅▅▃▁980399659631945390608621851894469499957494489316910789689361915789208663858185158687855292449243895586598669838085578612867383858179857794609082898389448924887187808500824374786422
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁█████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆235723482342233523282321231423082302230322952282227722722263225822532247223922352230222126512646264026342623261926132607260426002600259125802577257226152611260726032587257825642553
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings███▇▇▇▆▇▇▆▆▆▅▅▅▅▄▄▄▄▃▃▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁108121072810491103081008398639670100129777954293279126892787448542835381607995781476567472733286588478827380837899773275487371717369796793703174877313711270606864667364916289611759235667
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██████████▇▇▇▇▇█████303030303030303030303030303030303030303030303636363636363636363635353535353636363636NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ███▇▇▇▆▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▅▄▄▄▃▃▃▃▂▂▂▂▃▃▂▂▂▂▁▁108121072810491103081008398639670100129777954293279126892787448542835381607995781476567472733286588478827380837899773275487371717369796793703174877313711270606864667364916289NANANA
us-gaap:TreasuryStockValue ███▇▇▇▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▂▆▆▆▆▅▅▅▅▄▄▄▃▃▃▂▂▂▁▁▁317931793079297928792779262826282528242823282228212820281925182517241624152414091306119826492549244923492299222421252030193018301705153015301279113311101081884754754NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▅▄▄▃▁▁▄▅▆▆▆▅▅▇▇▆▅▅▅▆▆██▇▆▇▆▇█-21737-153-242-502-814-868-276-821271241040-5145033920016223260166548631454255409216485628NANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▇▄▆█▇▅▅▃▃▂▄▃▅▁▃▃▃▃▄▅▃▂▅▄219484314425516453387396299283224334308361193268293292273326400279218379346NANANA265NANANA329NANANA301283245386281383245317290
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▅▅▂▃▄▆▁▇▅▅▅▅▅█▁▅▄▅▅▄▅▅▆▂122-187-198-642-365-34214-720119-106-101-152-124-189331-742-110-258-102-119-233-198-126-21-540NANANA184NANANA-181NANANA188-230-413-179-249-475-332-129-277
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▄▆▃▃▃▆▃▄▄▄▄▄▁█▄▅▃▄▃▅▄▃▆-89-290-99214-183-230-286115-187-169-169-172-177-159-531447-175-30-184-168-184-39-143-321176NANANA-424NANANA-161NANANA-486-77165-177-51-57258-189-13
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▇▄▆█▇▅▅▃▃▂▄▃▅▁▃▃▃▃▄▅▃▂▅▄219484314425516453387396299283224334308361193268293292273326400279218379346NANANA265NANANA329NANANA301283245386281383245317290
us-gaap:NetIncomeLoss ▇█▇███▂█████▇█▇▇▇▇▇▇▇▂▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇█▇161296242281280249-284285273266252245229248236236210226203224212-279221242228221205218212233230216213-425205229225225220209229199221267164
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆█▇██▇▁███▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇161296242281280249-284285273266252245229248236236210226203224212-290221242228NA205218212NA230216213NANANA225225220209229199221267164
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▅▅▂▃▄▆▁▇▅▅▅▅▅█▁▅▄▅▅▄▅▅▆▂122-187-198-642-365-34214-720119-106-101-152-124-189331-742-110-258-102-119-233-198-126-21-540NANANA184NANANA-181NANANA188-230-413-179-249-475-332-129-277
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▇▇▅▄█▅▄▄▆▁▂▃▃▁▃▁▃▂▂▄▃▄▄▄39434236284836302940162027241824172620213127283028NANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▄▆▃▃▃▆▃▄▄▄▄▄▁█▄▅▃▄▃▅▄▃▆-89-290-99214-183-230-286115-187-169-169-172-177-159-531447-175-30-184-168-184-39-143-321176NANANA-424NANANA-161NANANA-486-77165-177-51-57258-189-13
us-gaap:RepaymentsOfLongTermDebt 15NANANA15NANA1515151518151537510131631419296516015NANANA71NANANA17NANANA241552433302044
us-gaap:PaymentsOfDividends ▇██▇▇▇▇▅▆▅▅▄▄▄▄▃▄▄▄▂▃▂▃▁▁57585955555556505251514546464644454545414241423738NANANA35NANANA31NANANA292930272727272425
us-gaap:PaymentsOfDividends ▇██▇▇▇▇▅▆▅▅▄▄▄▄▃▄▄▄▂▃▂▃▁▁57585955555556505251514546464644454545414241423738NANANA35NANANA31NANANA292930272727272425
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▆▆▆▆█▁▆▆▅▆▆▆▅▆▆▆▅▆▆▆▁▆▆▆01039710010015001001059410010010696100100108911151031081101102100NANANA99NANANA175NANANA21532196127000NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:RepaymentsOfLongTermDebt 15NANANA15NANA1515151518151537510131631419296516015NANANA71NANANA17NANANA241552433302044

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value30303030303030303030303030303030303030303030363636363636363636363535353535363636363636
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value306305305305305305305305304304304304303303303303303302302302302301361361361360360360360359359359359358358358358364364364364363362
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value203208211214218221222226228230234237239246249252254257260264266270278283291299307314324332333332331
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value203208211214218220221225227229233236239245248251253256259262265269278283290298306312323331332331331
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.791.441.161.331.311.15-1.31.291.231.191.121.081.01.071.011.00.880.930.830.90.85-1.110.870.940.880.850.780.820.790.860.830.760.74-1.450.690.750.720.710.680.630.690.60.670.810.5
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.791.441.161.331.311.15-1.31.291.231.191.121.071.01.071.011.00.880.930.830.90.84-1.110.870.940.880.840.780.820.790.850.830.760.73-1.450.690.750.720.710.680.630.690.60.660.80.5
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value287130342960301629872880292728902899283928192822280627962763276127252722265727032647263526092653261125862540260126242658262826172611260425452564256325932527251025612496251726282448
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value287130342960301629872880292728902899283928192822280627962763276127252722265727032647263526092656261425862540
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.1100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.1100.0100.0
Percentage of Revenues us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Premiums Earned Net

us-gaap:PremiumsEarnedNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value237123522331234323382263225122212250215821532142214220992089208120872037202020172006196719471943193818901897190519301937192919271921188818811875186918681850184918631865186118751872
Percentage of PremiumsEarnedNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues82.677.578.877.778.378.676.976.877.676.076.475.976.475.175.675.476.674.976.074.675.874.774.673.274.273.174.773.273.672.973.473.673.672.573.973.172.972.073.273.772.774.773.971.476.5

Net Investment Income

us-gaap:NetInvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value585616599624594608619623602619609620602617611623606636612630602629606629612629615626621643619633619634629637618634618629613595579597573
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues20.420.320.220.719.921.121.121.620.821.821.622.021.522.122.122.622.223.423.023.322.723.923.223.723.524.324.224.123.724.223.624.223.724.424.724.824.124.524.525.123.923.923.022.723.4

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value585616599624594608619623602619609620602617611623606636612630602629606632615629615
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.5100.5100.0100.0
Percentage of Revenues20.420.320.220.719.921.121.121.620.821.821.622.021.522.122.122.622.223.423.023.322.723.923.223.823.624.324.2
Percentage of Revenues us-gaap:OperatingSegments20.420.320.220.719.921.121.121.620.821.821.622.021.522.122.122.622.223.423.023.322.723.923.223.823.624.324.2

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, unm:ClosedBlock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value336356347354346345348345337341337340335343334341333340327331320323317325315327315
Percentage of NetInvestmentIncome57.557.957.956.758.356.856.255.456.155.155.454.855.755.654.654.755.053.553.552.653.251.452.451.851.552.151.2
Percentage of Revenues11.711.811.711.811.612.011.912.011.612.012.012.011.912.312.112.412.212.512.312.312.112.312.212.312.112.712.4
Percentage of Revenues us-gaap:OperatingSegments unm:ClosedBlock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:ColonialLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value373736373637364037373636353536353435353637373535363536
Percentage of NetInvestmentIncome6.46.06.26.06.26.15.96.46.26.05.95.95.85.85.95.75.65.65.95.96.16.05.95.76.05.65.9
Percentage of Revenues1.31.21.21.21.21.31.31.41.31.31.31.31.31.31.31.31.21.31.41.41.41.41.41.31.41.41.4
Percentage of Revenues us-gaap:OperatingSegments unm:ColonialLife0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:UnumInternational



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value262824442431263227
Percentage of NetInvestmentIncome4.54.64.17.24.25.14.35.14.6
Percentage of Revenues0.90.90.81.50.81.10.91.11.0
Percentage of Revenues us-gaap:OperatingSegments unm:UnumInternational0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:UnumUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value179189184184182187200196194202201205202206207207207220214215215226216218223229233
Percentage of NetInvestmentIncome30.730.730.729.530.630.832.331.532.232.633.033.133.633.433.933.334.234.635.034.235.735.935.734.736.436.537.9
Percentage of Revenues6.36.26.26.16.16.56.86.86.77.17.17.37.27.47.57.57.68.18.18.08.18.68.38.28.58.99.2
Percentage of Revenues us-gaap:OperatingSegments unm:UnumUs0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value5564477957652354456763287-50
Percentage of NetInvestmentIncome0.90.81.10.70.71.21.31.50.91.21.00.80.50.60.90.80.80.81.01.21.00.50.31.31.1-0.80.1
Percentage of Revenues0.20.20.20.10.10.20.30.30.20.30.20.20.10.10.20.20.20.20.20.30.20.10.10.30.3-0.20.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2333434454655
Percentage of NetInvestmentIncome0.50.50.60.60.80.60.70.80.80.71.10.80.9
Percentage of Revenues0.10.10.10.10.20.10.20.20.20.20.20.20.2
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:CashFlowHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:InvestmentIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value110000000000
Percentage of NetInvestmentIncome0.20.20.10.10.10.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:FairValueHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:InvestmentIncome0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value73727475738075767778798181
Percentage of NetInvestmentIncome12.511.812.412.012.313.112.212.312.912.713.113.113.6
Percentage of Revenues2.52.42.52.52.42.82.62.72.72.82.82.92.9
Percentage of Revenues us-gaap:InterestRateSwap us-gaap:CashFlowHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:InvestmentIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0000000000111
Percentage of NetInvestmentIncome0.00.00.00.00.00.00.00.00.10.10.20.20.2
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.10.0
Percentage of Revenues us-gaap:InterestRateSwap us-gaap:FairValueHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:InvestmentIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value010000000000000000000-1-1-1-1-1
Percentage of NetInvestmentIncome0.10.2-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.0-0.0-0.0-0.0-0.1-0.0-0.0-0.0-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2
Percentage of Revenues0.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1819191717171616141514141313131311121312111212111011
Percentage of NetInvestmentIncome3.23.23.22.82.92.92.62.62.42.52.42.42.22.32.22.21.92.12.12.11.92.01.91.91.71.8
Percentage of Revenues0.70.60.60.60.60.60.60.60.50.50.50.50.50.50.50.50.40.50.50.50.50.50.50.40.40.4
Percentage of Revenues us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Realized Investment Gains Losses

Other Income

us-gaap:OtherIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value585655565350504849494651505151515250515454555454535456625858575956596358605961616767
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.01.91.91.91.81.71.71.71.71.71.71.81.81.81.91.91.91.91.92.02.12.12.12.12.12.12.22.42.22.22.22.32.22.32.42.32.42.32.42.52.62.7

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value585655565350504849494651505151515250515454555454535654
Percentage of OtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Revenues2.01.91.91.91.81.71.71.71.71.71.71.81.81.81.91.91.91.91.92.02.12.12.12.12.12.22.1
Percentage of Revenues us-gaap:OperatingSegments2.01.91.91.91.81.71.71.71.71.71.71.81.81.81.91.91.91.91.92.02.12.12.12.12.12.22.1

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, unm:ClosedBlock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value181718161818181819191820202021212221212223222324212223
Percentage of OtherIncome31.031.534.029.533.937.037.739.138.440.140.539.541.440.641.741.943.142.841.741.742.640.042.944.640.10.043.5
Percentage of Revenues0.60.60.60.50.60.60.60.70.70.70.70.70.70.70.80.80.80.80.80.80.90.80.90.90.80.90.9
Percentage of Revenues us-gaap:OperatingSegments unm:ClosedBlock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:ColonialLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value010000000000000000000000000
Percentage of OtherIncome0.52.11.61.21.10.40.80.60.60.60.60.40.60.40.80.60.60.00.20.00.00.00.20.2-0.20.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.0
Percentage of Revenues us-gaap:OperatingSegments unm:ColonialLife0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:UnumInternational



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0300000.00.0300000.00.0400000.00.00.00.0
Percentage of OtherIncome0.00.50.00.50.00.80.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments unm:UnumInternational0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, unm:UnumUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value403634363430302829272630282728272928283130303030302930
Percentage of OtherIncome68.565.062.665.765.059.661.359.658.656.256.758.857.254.355.754.655.856.654.657.456.855.155.355.257.40.055.7
Percentage of Revenues1.41.21.21.21.21.01.01.01.01.00.91.11.01.01.01.01.11.11.11.21.21.21.21.11.21.11.2
Percentage of Revenues us-gaap:OperatingSegments unm:UnumUs0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value001101001100020100100200150
Percentage of OtherIncome0.00.91.83.00.02.20.20.62.42.80.91.40.84.71.72.50.60.63.50.90.65.01.6-0.42.80.00.6
Percentage of Revenues0.00.00.00.10.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.00.00.10.0-0.00.10.20.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Policyholder Benefits And Claims Incurred Net

us-gaap:PolicyholderBenefitsAndClaimsIncurredNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value185418811871190218401829257818041807178917651752174917351742173317291735169017021653237216531653163116411661164816861683166216351599159316181587157915681566156515841575
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 Revenues64.662.063.263.161.663.588.162.462.363.062.662.162.362.163.162.863.563.763.663.062.590.063.462.362.564.663.962.864.264.363.764.362.462.262.462.862.961.262.762.260.364.3

Deferred Policy Acquisition Cost Amortization Expense

us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value17614114615117013613614015112312313814111511812613210611712413410710710611898101123879999125136138139130135141131130132131
Percentage of DeferredPolicyAcquisitionCostAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.14.74.95.05.74.84.74.95.24.44.44.95.04.14.34.64.93.94.44.65.14.14.14.04.53.93.94.73.33.83.84.95.35.45.45.25.45.55.35.25.15.4

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value202377299352353309-377354341345366361330371332340304316298319303-457312346326305284311303322320296310-704293338330335326308361295334411250
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues7.012.410.111.711.810.8-12.912.311.812.213.012.811.813.312.012.311.211.611.211.811.4-17.412.013.112.511.811.212.011.612.112.211.311.9-27.011.513.212.912.912.912.314.111.913.315.610.2

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value202377299352353309-377354341345366361330371332340304316298319303-457312349329305284
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0101.0101.0100.0100.0
Percentage of Revenues7.012.410.111.711.810.8-12.912.311.812.213.012.811.813.312.012.311.211.611.211.811.4-17.412.013.212.611.811.2
Percentage of Revenues us-gaap:OperatingSegments7.012.410.111.711.810.8-12.912.311.812.213.012.811.813.312.012.311.211.611.211.811.4-17.412.013.212.611.811.2

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-4-4-4-4-4-5-5-5-5-4-4-4-4-3-4-3-4-2-3-2-3-65-1-1-1-12
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-2.4-1.2-1.5-1.3-1.3-1.81.5-1.6-1.6-1.4-1.3-1.4-1.5-1.0-1.2-1.1-1.3-0.9-1.0-0.9-1.014.3-0.3-0.3-0.3-0.30.7
Percentage of Revenues-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-2.5-0.0-0.0-0.0-0.00.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value182022162016151411913121213121547121310119211097
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments9.35.37.64.75.75.5-4.04.13.42.53.83.73.33.93.65.214.94.04.33.4-2.52.96.33.23.12.8
Percentage of Revenues0.70.70.80.50.70.60.50.50.40.30.50.40.40.50.40.61.70.50.50.40.40.40.80.40.40.3
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-53-5-20-8-8-22100082301-1-15-350-1-9-350-3-3-27
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-26.7-1.5-6.9-2.3-2.5-7.3-0.3-0.0-0.20.22.20.61.00.10.3-0.4-5.1-11.10.3-0.3-3.10.81.70.3-1.1-1.1-9.7
Percentage of Revenues-1.9-0.2-0.7-0.3-0.3-0.80.0-0.0-0.00.00.30.10.10.00.0-0.0-0.6-1.30.0-0.0-0.4-0.10.20.0-0.1-0.1-1.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value418157707260-93696778114116100123961039390959590-178911049778929190809687108104109105981319611314485
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 Revenues1.42.71.92.32.42.1-3.22.42.32.84.14.13.64.43.53.73.43.33.63.53.4-6.83.53.93.73.13.63.53.43.13.73.44.24.14.24.23.95.13.94.55.53.5

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-1-10-1-1-1-1-1-1-1-1-1-1-1-1-1-10-1-1-1-2200000
Percentage of IncomeTaxExpenseBenefit-2.4-2.0-0.7-1.4-1.4-2.01.2-1.9-1.8-2.0-1.5-1.5-1.7-1.0-1.6-1.4-1.5-1.0-1.2-1.0-1.112.8-0.3-0.4-0.30.00.5
Percentage of Revenues-0.0-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.9-0.0-0.0-0.0-0.00.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value344343334344444514443435332
Percentage of IncomeTaxExpenseBenefit9.25.28.54.85.85.9-3.34.65.12.74.24.33.54.74.25.916.24.44.84.0-2.23.65.33.90.03.6
Percentage of Revenues0.10.10.20.10.10.10.10.10.10.10.20.20.20.20.20.20.50.20.20.10.20.10.20.10.10.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-11-1-4-1-1-40000301000-5-1200-3-110-1-1-9
Percentage of IncomeTaxExpenseBenefit-27.5-1.5-7.7-2.4-2.5-7.9-0.30.0-0.30.32.60.71.10.20.2-0.6-5.6-13.50.3-0.7-3.70.71.90.2-1.30.0-12.2
Percentage of Revenues-0.4-0.0-0.1-0.1-0.1-0.20.00.0-0.00.00.10.00.00.00.0-0.0-0.2-0.40.0-0.0-0.1-0.00.10.0-0.0-0.1-0.4
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value161296242281280249-284285273266252245229248236236210226203224212-279221242228221205218212233230216213-425205229225225220209229199221267164
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.69.88.29.39.48.6-9.79.99.49.48.98.78.28.98.58.67.78.37.78.38.0-10.68.59.18.88.68.18.48.18.88.88.38.2-16.38.19.08.88.78.78.49.08.08.810.26.7

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-3-3-4-3-3-4-4-4-4-3-3-3-3-2-2-2-2-1-1-1-2-4200001
Percentage of NetIncomeLoss-2.4-1.0-1.7-1.3-1.3-1.71.5-1.5-1.6-1.2-1.3-1.3-1.4-1.0-1.1-1.1-1.2-0.8-0.9-0.8-0.915.2-0.3-0.2-0.3-0.40.8
Percentage of Revenues-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-1.6-0.0-0.0-0.0-0.00.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1415181315131211758878810327967516665
Percentage of NetIncomeLoss9.35.37.44.65.65.3-4.24.02.92.33.63.53.23.63.44.914.43.94.13.1-2.72.76.73.02.82.5
Percentage of Revenues0.50.50.60.40.50.50.40.40.30.20.30.30.30.30.30.41.20.30.30.30.30.20.60.30.20.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-42-4-16-6-6-170000512000-10-2200-6-230-2-2-17
Percentage of NetIncomeLoss-26.5-1.5-6.8-2.3-2.5-7.1-0.3-0.0-0.20.22.10.61.00.10.4-0.3-4.9-10.10.2-0.2-2.80.81.70.3-1.0-1.0-8.7
Percentage of Revenues-1.5-0.1-0.6-0.2-0.2-0.60.0-0.0-0.00.00.20.00.10.00.0-0.0-0.4-0.80.0-0.0-0.2-0.10.10.0-0.1-0.1-0.7
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value161296242281280249-284285273266252245229248236236210226203224212-290221242228205218212230216213225225220209229199221267164
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.69.88.29.39.48.6-9.79.99.49.48.98.78.28.98.58.67.78.37.78.38.0-11.08.59.18.88.18.48.18.88.38.28.88.78.78.49.08.08.810.26.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value65335670136695565843639216187562249623666301264013638056338162524619416390563853619676058961503617066301462497619606221861078594035958559366616116223662119606785957160179600405801557116573075905456792549975447749417
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, unm:ClosedBlock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value360043700836906361963554234527343603406334603350513471734466338823373434821345593354932992334313341834462339603315131564
Percentage of Assets55.155.255.155.055.655.855.254.654.954.854.454.454.254.554.554.154.154.554.454.254.754.353.553.1
Percentage of Assets55.155.255.155.055.655.855.254.654.954.854.454.454.254.554.554.154.154.554.454.254.754.353.553.1
Percentage of Assets us-gaap:OperatingSegments unm:ClosedBlock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, unm:ColonialLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value442846294608453142864237414542644292418440994039397639233940387437593776377037703774369236233482
Percentage of Assets6.86.96.96.96.76.86.76.86.86.56.46.46.46.36.26.16.16.26.16.16.05.95.85.9
Percentage of Assets6.86.96.96.96.76.86.76.86.86.56.46.46.46.36.26.16.16.26.16.16.05.95.85.9
Percentage of Assets us-gaap:OperatingSegments unm:ColonialLife100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, unm:UnumInternational



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3515386937133769364634263428
Percentage of Assets5.45.85.55.75.75.55.4
Percentage of Assets5.45.85.55.75.75.55.4
Percentage of Assets us-gaap:OperatingSegments unm:UnumInternational100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, unm:UnumUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value177911858618617184381780217510172971764118036181091806918232181111803618465183101796318242186301864418865186761867218384
Percentage of Assets27.227.727.828.027.828.327.828.328.628.328.328.829.029.128.928.729.030.130.330.229.929.930.130.9
Percentage of Assets27.227.727.828.027.828.327.828.328.628.328.328.829.029.128.928.729.030.130.330.229.929.930.130.9
Percentage of Assets us-gaap:OperatingSegments unm:UnumUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value359729203110290826442172323530532581324034973284334431463280378332412145203421212299246527142318
Percentage of Assets5.54.44.64.44.13.55.24.94.15.15.55.25.35.15.15.95.23.53.33.43.63.94.43.9
Percentage of Assets5.54.44.64.44.13.55.24.94.15.15.55.25.35.15.15.95.23.53.33.43.63.94.43.9
Percentage of Assets us-gaap:OperatingSegments us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value55532570485732456390548615325353731529205351254438543575406553417529735454354696530475192552922531915432653944527165297452122507445091550985530535362353446522925139151602505804893348133483635013047920462174597643019
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets85.085.185.685.685.886.186.384.984.985.085.285.385.485.585.485.785.685.786.086.286.286.385.185.185.385.485.485.986.186.286.086.286.385.784.284.384.384.484.984.484.084.487.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value65335670136695565843639216187562249623666301264013638056338162524619416390563853619676058961503617066301462497619606221861078594035958559366616116223662119606785957160179600405801557116573075905456792549975447749417
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-31
Value98039965963194539060862185189446949995749448931691078968936191578920866385818515868785529244924389558659866983808557861286738385817985779460908289838944892488718780850082437478642263978039
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.014.914.414.414.213.913.715.115.115.014.814.714.614.514.614.314.414.314.013.813.813.714.914.914.714.614.614.113.913.814.013.813.714.315.815.715.715.615.115.616.015.60.00.00.012.90.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-21737-153-242-502-814-868-276-821271241040-5145033920016223260166548631454255409216485628790600455448886436397341493437402341264-291-1080-958463612
Percentage of StockholdersEquity-2.20.4-1.6-2.6-5.5-9.4-10.2-2.9-0.91.31.31.10.0-0.64.83.72.20.20.30.03.01.95.96.85.12.94.72.65.77.39.17.25.65.29.44.84.43.85.54.94.64.03.2-3.9-16.8-15.05.80.0
Percentage of Assets-0.30.1-0.2-0.4-0.8-1.3-1.4-0.4-0.10.20.20.20.0-0.10.70.50.30.00.00.00.40.30.91.00.70.40.70.40.81.01.31.00.80.71.50.80.70.60.80.80.70.60.00.00.0-1.90.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value235723482342233523282321231423082302230322952282227722722263225822532247223922352230222126512646264026342623261926132607260426002600259125802577257226152611260726032587257825642553254625162200
Percentage of StockholdersEquity24.023.624.324.725.726.927.224.424.224.124.324.525.025.324.224.725.325.926.126.325.726.028.728.629.530.430.331.330.530.330.031.031.830.227.328.428.629.229.329.429.730.431.334.339.839.831.30.0
Percentage of Assets3.63.53.53.53.63.83.73.73.73.63.63.63.63.73.53.53.63.73.63.63.53.64.34.34.34.44.44.44.24.24.24.34.44.34.34.44.54.64.44.64.74.70.00.00.05.20.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value303030303030303030303030303030303030303030303636363636363636363635353535353636363636363636363634
Percentage of StockholdersEquity0.30.30.30.30.30.40.40.30.30.30.30.30.30.30.30.30.30.30.40.40.30.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.60.60.50.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value108121072810491103081008398639670100129777954293279126892787448542835381607995781476567472733286588478827380837899773275487371717369796793703174877313711270606864667364916289611759235667552750774925
Percentage of StockholdersEquity110.3107.7108.9109.1111.3114.4113.5106.0102.999.798.798.098.097.591.391.291.592.391.189.986.085.793.791.792.493.391.192.388.285.682.783.283.182.079.180.579.278.976.975.273.974.074.279.288.286.463.20.0
Percentage of Assets16.516.015.715.715.815.915.516.115.514.914.614.414.314.113.413.113.213.212.712.411.911.714.013.613.513.613.313.012.311.811.511.511.411.712.512.612.512.311.611.811.811.50.00.00.011.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-3179-3179-3079-2979-2879-2779-2628-2628-2528-2428-2328-2228-2128-2028-1925-1825-1724-1624-1524-1409-1306-1198-2649-2549-2449-2349-2299-2224-2125-2030-1930-1830-1705-1530-1530-1279-1133-1110-1081-884-754-754-754-754-754-754-54-54
Percentage of StockholdersEquity-32.4-31.9-32.0-31.5-31.8-32.2-30.9-27.8-26.6-25.4-24.6-23.9-23.4-22.6-20.6-19.9-19.3-18.8-17.8-16.6-15.0-14.0-28.7-27.6-27.4-27.1-26.5-26.5-24.8-23.6-22.3-21.8-20.8-17.8-16.2-14.1-12.6-12.4-12.1-10.0-8.6-8.9-9.1-10.1-11.7-11.8-0.70.0
Percentage of Assets-4.9-4.7-4.6-4.5-4.5-4.5-4.2-4.2-4.0-3.8-3.6-3.5-3.4-3.3-3.0-2.9-2.8-2.7-2.5-2.3-2.1-1.9-4.3-4.1-4.0-4.0-3.9-3.7-3.5-3.3-3.1-3.0-2.9-2.5-2.5-2.2-2.0-1.9-1.8-1.6-1.4-1.40.00.00.0-1.50.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash

us-gaap:Cash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value337847760629421499308777011710710087931201121091228410260112769463471027753381021165271565378815171220485049199121
Percentage of Cash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.10.10.10.10.20.30.20.50.10.10.20.20.20.10.10.20.20.20.20.10.20.10.20.10.20.10.10.20.10.10.10.20.20.10.10.10.10.10.10.10.10.00.00.00.10.00.0

Short Term Investments

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value540534568556548546521510508504489497501500509510515523529535537531531528519511508504499501497492497493492487482476467454447443409
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.80.80.90.90.80.80.80.80.80.80.80.80.80.80.80.90.90.90.90.90.90.80.90.90.90.90.80.80.80.80.80.80.80.80.80.80.80.80.80.80.8

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value348351348350351350346346348338338337335335336226229230232198198198200201201200201201200201201201201201201201201201201200200201200
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.50.50.50.60.60.60.60.50.50.50.50.50.50.40.40.40.40.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.40.40.30.40.40.40.4

Deferred Tax Assets Liabilities Net

Debt Current

Long Term Debt Current

us-gaap:LongTermDebtCurrent



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value399399019903521510
Percentage of LongTermDebtCurrent100.0100.00.0100.00.0100.0100.00.0
Percentage of Assets0.60.60.00.30.00.60.20.0

Long Term Debt

Long Term Debt Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-31
Value98039965963194539060862185189446949995749448931691078968936191578920866385818515868785529244924389558659866983808557861286738385817985779460908289838944892488718780850082437478642263978039
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.014.914.414.414.213.913.715.115.115.014.814.714.614.514.614.314.414.314.013.813.813.714.914.914.714.614.614.113.913.814.013.813.714.315.815.715.715.615.115.616.015.60.00.00.012.90.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-21737-153-242-502-814-868-276-821271241040-5145033920016223260166548631454255409216485628790600455448886436397341493437402341264-291-1080-958463612
Percentage of StockholdersEquity-2.20.4-1.6-2.6-5.5-9.4-10.2-2.9-0.91.31.31.10.0-0.64.83.72.20.20.30.03.01.95.96.85.12.94.72.65.77.39.17.25.65.29.44.84.43.85.54.94.64.03.2-3.9-16.8-15.05.80.0
Percentage of Assets-0.30.1-0.2-0.4-0.8-1.3-1.4-0.4-0.10.20.20.20.0-0.10.70.50.30.00.00.00.40.30.91.00.70.40.70.40.81.01.31.00.80.71.50.80.70.60.80.80.70.60.00.00.0-1.90.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value235723482342233523282321231423082302230322952282227722722263225822532247223922352230222126512646264026342623261926132607260426002600259125802577257226152611260726032587257825642553254625162200
Percentage of StockholdersEquity24.023.624.324.725.726.927.224.424.224.124.324.525.025.324.224.725.325.926.126.325.726.028.728.629.530.430.331.330.530.330.031.031.830.227.328.428.629.229.329.429.730.431.334.339.839.831.30.0
Percentage of Assets3.63.53.53.53.63.83.73.73.73.63.63.63.63.73.53.53.63.73.63.63.53.64.34.34.34.44.44.44.24.24.24.34.44.34.34.44.54.64.44.64.74.70.00.00.05.20.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value303030303030303030303030303030303030303030303636363636363636363635353535353636363636363636363634
Percentage of StockholdersEquity0.30.30.30.30.30.40.40.30.30.30.30.30.30.30.30.30.30.30.40.40.30.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.60.60.50.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value108121072810491103081008398639670100129777954293279126892787448542835381607995781476567472733286588478827380837899773275487371717369796793703174877313711270606864667364916289611759235667552750774925
Percentage of StockholdersEquity110.3107.7108.9109.1111.3114.4113.5106.0102.999.798.798.098.097.591.391.291.592.391.189.986.085.793.791.792.493.391.192.388.285.682.783.283.182.079.180.579.278.976.975.273.974.074.279.288.286.463.20.0
Percentage of Assets16.516.015.715.715.815.915.516.115.514.914.614.414.314.113.413.113.213.212.712.411.911.714.013.613.513.613.313.012.311.811.511.511.411.712.512.612.512.311.611.811.811.50.00.00.011.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-3179-3179-3079-2979-2879-2779-2628-2628-2528-2428-2328-2228-2128-2028-1925-1825-1724-1624-1524-1409-1306-1198-2649-2549-2449-2349-2299-2224-2125-2030-1930-1830-1705-1530-1530-1279-1133-1110-1081-884-754-754-754-754-754-754-54-54
Percentage of StockholdersEquity-32.4-31.9-32.0-31.5-31.8-32.2-30.9-27.8-26.6-25.4-24.6-23.9-23.4-22.6-20.6-19.9-19.3-18.8-17.8-16.6-15.0-14.0-28.7-27.6-27.4-27.1-26.5-26.5-24.8-23.6-22.3-21.8-20.8-17.8-16.2-14.1-12.6-12.4-12.1-10.0-8.6-8.9-9.1-10.1-11.7-11.8-0.70.0
Percentage of Assets-4.9-4.7-4.6-4.5-4.5-4.5-4.2-4.2-4.0-3.8-3.6-3.5-3.4-3.3-3.0-2.9-2.8-2.7-2.5-2.3-2.1-1.9-4.3-4.1-4.0-4.0-3.9-3.7-3.5-3.3-3.1-3.0-2.9-2.5-2.5-2.2-2.0-1.9-1.8-1.6-1.4-1.40.00.00.0-1.50.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value30303030303030303030303030303030303030303030363636363636363636363535353535363636363636
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value1081210728104911030810083986396701001297779542932791268927874485428353816079957814765674727332865884788273808378997732754873717173697967937031748773137112706068646673649162895527
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.516.015.715.715.815.915.516.115.514.914.614.414.314.113.413.113.213.212.712.411.911.714.013.613.513.613.313.012.311.811.511.511.411.712.512.612.512.311.611.811.811.511.2

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613



Period End2020-01-012019-12-31
Value1070910728
Percentage of RetainedEarningsAccumulatedDeficit0.0100.0
Percentage of Assets0.016.0
Percentage of Assets us-gaap:AccountingStandardsUpdate2016130.00.0

us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:RestatementAdjustment, us-gaap:AccountingStandardsUpdate201613



Period End2020-01-01
Value-18
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets0.0
Percentage of Assets srt:RestatementAdjustment us-gaap:AccountingStandardsUpdate2016130.0

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value317931793079297928792779262826282528242823282228212820281925182517241624152414091306119826492549244923492299222421252030193018301705153015301279113311101081884754754754
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.94.74.64.54.54.54.24.24.03.83.63.53.43.33.02.92.82.72.52.32.11.94.34.14.04.03.93.73.53.33.13.02.92.52.52.22.01.91.81.61.41.41.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-21737-153-242-502-814-868-276-821271241040-5145033920016223260166548631454255409216485628
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.30.1-0.2-0.4-0.8-1.3-1.4-0.4-0.10.20.20.20.0-0.10.70.50.30.00.00.00.40.30.91.00.70.40.70.40.81.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value219484314425516453387396299283224334308361193268293292273326400279218379346265329301283245386281383245317290
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 Revenues7.716.010.614.117.315.713.213.710.310.07.911.811.012.97.09.710.810.810.312.115.110.68.414.313.310.112.611.710.99.715.411.015.49.812.111.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value122-187-198-642-365-34214-720119-106-101-152-124-189331-742-110-258-102-119-233-198-126-21-540184-181188-230-413-179-249-475-332-129-277
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 Revenues4.3-6.2-6.7-21.3-12.2-11.90.5-24.94.1-3.8-3.6-5.4-4.4-6.812.0-26.9-4.1-9.5-3.8-4.4-8.8-7.5-4.9-0.8-20.77.0-7.07.3-8.9-16.4-7.1-9.8-19.0-13.2-4.9-11.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-89-290-99214-183-230-286115-187-169-169-172-177-159-531447-175-30-184-168-184-39-143-321176-424-161-486-77165-177-51-57258-189-13
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 Revenues-3.1-9.6-3.47.1-6.1-8.0-9.84.0-6.5-6.0-6.0-6.1-6.3-5.7-19.216.2-6.4-1.1-6.9-6.2-7.0-1.5-5.5-12.16.7-16.2-6.2-19.0-3.06.6-7.1-2.0-2.310.3-7.2-0.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value219484314425516453387396299283224334308361193268293292273326400279218379346265329301283245386281383245317290
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 Revenues7.716.010.614.117.315.713.213.710.310.07.911.811.012.97.09.710.810.810.312.115.110.68.414.313.310.112.611.710.99.715.411.015.49.812.111.9

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value161296242281280249-284285273266252245229248236236210226203224212-279221242228221205218212233230216213-425205229225225220209229199221267164
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.69.88.29.39.48.6-9.79.99.49.48.98.78.28.98.58.67.78.37.78.38.0-10.68.59.18.88.68.18.48.18.88.88.38.2-16.38.19.08.88.78.78.49.08.08.810.26.7

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-3-3-4-3-3-4-4-4-4-3-3-3-3-2-2-2-2-1-1-1-2-4200001
Percentage of NetIncomeLoss-2.4-1.0-1.7-1.3-1.3-1.71.5-1.5-1.6-1.2-1.3-1.3-1.4-1.0-1.1-1.1-1.2-0.8-0.9-0.8-0.915.2-0.3-0.2-0.3-0.40.8
Percentage of Revenues-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-1.6-0.0-0.0-0.0-0.00.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1415181315131211758878810327967516665
Percentage of NetIncomeLoss9.35.37.44.65.65.3-4.24.02.92.33.63.53.23.63.44.914.43.94.13.1-2.72.76.73.02.82.5
Percentage of Revenues0.50.50.60.40.50.50.40.40.30.20.30.30.30.30.30.41.20.30.30.30.30.20.60.30.20.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, 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-42-4-16-6-6-170000512000-10-2200-6-230-2-2-17
Percentage of NetIncomeLoss-26.5-1.5-6.8-2.3-2.5-7.1-0.3-0.0-0.20.22.10.61.00.10.4-0.3-4.9-10.10.2-0.2-2.80.81.70.3-1.0-1.0-8.7
Percentage of Revenues-1.5-0.1-0.6-0.2-0.2-0.60.0-0.0-0.00.00.20.00.10.00.0-0.0-0.4-0.80.0-0.0-0.2-0.10.10.0-0.1-0.1-0.7
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value161296242281280249-284285273266252245229248236236210226203224212-290221242228205218212230216213225225220209229199221267164
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.69.88.29.39.48.6-9.79.99.49.48.98.78.28.98.58.67.78.37.78.38.0-11.08.59.18.88.18.48.18.88.38.28.88.78.78.49.08.08.810.26.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

Depreciation Depletion And Amortization

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value122-187-198-642-365-34214-720119-106-101-152-124-189331-742-110-258-102-119-233-198-126-21-540184-181188-230-413-179-249-475-332-129-277
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 Revenues4.3-6.2-6.7-21.3-12.2-11.90.5-24.94.1-3.8-3.6-5.4-4.4-6.812.0-26.9-4.1-9.5-3.8-4.4-8.8-7.5-4.9-0.8-20.77.0-7.07.3-8.9-16.4-7.1-9.8-19.0-13.2-4.9-11.3

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value39434236284836302940162027241824172620213127283028
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-89-290-99214-183-230-286115-187-169-169-172-177-159-531447-175-30-184-168-184-39-143-321176-424-161-486-77165-177-51-57258-189-13
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 Revenues-3.1-9.6-3.47.1-6.1-8.0-9.84.0-6.5-6.0-6.0-6.1-6.3-5.7-19.216.2-6.4-1.1-6.9-6.2-7.0-1.5-5.5-12.16.7-16.2-6.2-19.0-3.06.6-7.1-2.0-2.310.3-7.2-0.5

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value151515151515181515375101316314192965160157117241552433302044
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value575859555555565052515145464646444545454142414237383531292930272727272425
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value575859555555565052515145464646444545454142414237383531292930272727272425
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value010397100100150010010594100100106961001001089111510310811011021009917521532196127000
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value151515151515181515375101316314192965160157117241552433302044
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

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

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

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

Share Based Compensation

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value253716-1-31-120114-2092317-4610612-5-2673-1338-1841-5135-1724-143-25-229-19-149171-10
Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:ConsolidationItems

unm:AdjustedOperatingRevenue

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3015302529863024298629222921289229012827280928132795
Percentage of AdjustedOperatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, unm:ClosedBlock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value598628623630628630634634630639638641643
Percentage of AdjustedOperatingRevenue19.920.820.920.821.021.621.721.921.722.622.722.823.0

us-gaap:OperatingSegments, unm:ColonialLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value472463457458456447437435435419415413409
Percentage of AdjustedOperatingRevenue15.715.315.315.215.315.315.015.115.014.814.814.714.7

us-gaap:OperatingSegments, unm:UnumInternational



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value191194176203178183164171167
Percentage of AdjustedOperatingRevenue6.36.45.96.76.06.35.65.95.8

us-gaap:OperatingSegments, unm:UnumUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1747173417201725171816521677164116621594158815931591
Percentage of AdjustedOperatingRevenue58.057.357.657.157.556.657.456.757.356.456.556.656.9

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5576487968653
Percentage of AdjustedOperatingRevenue0.20.20.30.20.10.30.30.30.20.30.20.20.1

unm:ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value1446416-665-760-932360-260503807-55-66-298-134974-135-699-566681215964-226-480113-396-520283928197-430-420166
Percentage of ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value380107-172-201-24595-69-13321216-3116267506-51-367-2871357113507-120-24867-211-272169500108-213-22797
Percentage of ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:InvestmentIncomeOnPfaAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value3333333333333333333333333334434
Percentage of InvestmentIncomeOnPfaAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:NotionalAmountOfDerivativesAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value524938067551943274651241603030006729040268010101094275213515121941722276
Percentage of NotionalAmountOfDerivativesAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk

us-gaap:CreditDefaultSwap, us-gaap:CreditRiskContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00000011000000
Percentage of NotionalAmountOfDerivativesAdditions0.00.00.00.00.0-1.026.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value0035810130020262524160300000672740180
Percentage of NotionalAmountOfDerivativesAdditions0.00.094.215.623.40.00.076.057.448.6100.0100.00.0100.00.00.00.00.0100.093.1100.06.70.0

us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType

us-gaap:InterestRateSwap, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value524922574219316
Percentage of NotionalAmountOfDerivativesAdditions100.0100.05.884.476.6101.074.024.0

unm:NotionalAmountOfDerivativesForeignCurrency



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value-700000.0800000.0-300000.0-700000.0200000.0
Percentage of NotionalAmountOfDerivativesForeignCurrency100.0100.0100.0100.0100.0

us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk

us-gaap:CreditDefaultSwap, us-gaap:CreditRiskContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value-700000.0800000.0-300000.0-300000.0200000.0
Percentage of NotionalAmountOfDerivativesForeignCurrency100.0100.0100.042.9100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.00.0-400000.00.0
Percentage of NotionalAmountOfDerivativesForeignCurrency-0.00.0-0.057.10.0

unm:NotionalAmountOfDerivativesTerminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1992695546165510070581272330643575242295688542114177751827175835589851154-337-100
Percentage of NotionalAmountOfDerivativesTerminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk

us-gaap:CreditDefaultSwap, us-gaap:CreditRiskContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00000000700000
Percentage of NotionalAmountOfDerivativesTerminations0.00.00.00.00.00.00.00.0100.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value19425623002026025241610200006702740180
Percentage of NotionalAmountOfDerivativesTerminations100.094.195.041.80.00.037.326.70.043.119.466.932.930.80.00.00.029.10.039.273.882.60.0

us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType

us-gaap:InterestRateSwap, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value05133246163425
Percentage of NotionalAmountOfDerivativesTerminations0.05.95.058.2100.0100.062.725.4

unm:OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentNetOfTax



Period End2020-03-312019-03-31
Value22-20
Percentage of OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentNetOfTax100.0100.0

unm:OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentTax



Period End2020-03-312019-03-31
Value6-5
Percentage of OtherComprehensiveIncomeLossNetGainOnHedgesAdjustmentTax100.0100.0

unm:OtherInvestmentsGrossRealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value000300000601010212571912751720014101
Percentage of OtherInvestmentsGrossRealizedGains100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

unm:OtherInvestmentsGrossRealizedLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302011-09-302011-06-302010-09-302010-06-30
Value00000000000000000000000000000000100
Percentage of OtherInvestmentsGrossRealizedLosses100.0100.00.00.0100.00.00.00.00.00.00.00.0100.00.00.0100.0100.0100.00.00.00.0100.0100.00.0100.00.00.00.00.00.00.00.0100.00.0100.0

unm:TaxBenefitsfromLowIncomeHousingInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2333233334444444444444444
Percentage of TaxBenefitsfromLowIncomeHousingInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount



Period End2020-03-312019-03-31
Value89
Percentage of AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount100.0100.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization



Period End2020-03-312019-03-31
Value56
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-03-312014-09-302013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value11111000000000000022221133366
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesGrossRealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value101173042254124110164124243104264351489611
Percentage of AvailableForSaleSecuritiesGrossRealizedGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value025167633101113049134150015331521559647
Percentage of AvailableForSaleSecuritiesGrossRealizedLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BenefitsLossesAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value266926572660266426342571330525352558249324522460247624252431242124212405235823832344309322972307228422562290232123072321230122522226223222572201220222002200218222162198
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:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-03-31
Value0.2850.26
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-93486331541592303-8779181270271349281-253346375395220222-32306-661137420428398-507042036120765526828073276244291275777106943
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value571044274545428089991391055614384107511009510540-63587829691128185337549165508095748011911760
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:DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal



Period End2020-03-312019-03-31
Value530
Percentage of DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal100.00.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-16-2315-3185-95-11-21-21-241043-1912-442-100-1049-1153225679-19947658331739592535616-52625
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-14553-16018329-1662517343114202929202037221610341918102219
Percentage of DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

country:GB, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-300000.0-200000.0-300000.0-200000.0-100000.0-200000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-4-5-5-5-5-5
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses1566.72550.01666.72550.05400.02700.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.0600000.0700000.0600000.0600000.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-0.0-300.0-233.30.0-300.0-0.0-0.00.00.00.00.00.00.00.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-100000.00.0-100000.00.0-100000.00.0-100000.00.0-100000.0-100000.0-100000.0-100000.0-100000.0-100000.00.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType, us-gaap:SubsequentEventType, unm:AnnuityContract

us-gaap:DefinedBenefitPlanBenefitObligationBenefitsPaid

country:US, us-gaap:PensionPlansDefinedBenefit, us-gaap:SubsequentEvent, unm:GroupAnnuityContact



Period End2020-01-02
Value-44
Percentage of DefinedBenefitPlanBenefitObligationBenefitsPaid100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

country:GB, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value222212
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value262424242626
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets1112.51082.61181.01127.31373.71134.8

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value100000.0200000.0100000.0200000.0100000.0200000.0100000.0200000.0100000.0200000.0100000.0100000.0200000.0100000.0200000.0100000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets4.28.74.80.04.510.54.30.00.00.00.00.00.00.00.00.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

country:GB, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value111111
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value182020202019
Percentage of DefinedBenefitPlanInterestCost1516.71300.01485.71386.71538.51326.7

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1111111111111111
Percentage of DefinedBenefitPlanInterestCost83.381.2100.00.086.792.380.00.00.00.00.00.00.00.00.00.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

country:GB, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-900000.0-500000.0-400000.0-500000.0-500000.0-600000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-133311
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost111.1-740.0-950.0-760.0-300.0-250.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0000011111111112
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-88.9-100.0-125.00.0-100.0-200.0-166.70.00.00.00.00.00.00.00.00.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value222222
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value282727272726252424252526262525252525252523212322202120191919181819181817
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:DerivativeGainLossOnDerivativeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value000000000000020-1-237-10-100120-100000
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0001000002501
Percentage of DerivativeGainLossOnDerivativeNet-0.066.7700.0-111.1266.7-33.3200.00.00.01250.02600.0-100.0-600.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0100000000000
Percentage of DerivativeGainLossOnDerivativeNet128.6183.3-300.0-44.433.3-16.7150.00.042.9150.0250.0-66.7-100.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-137-410-10-10000
Percentage of DerivativeGainLossOnDerivativeNet1885.71300.04800.0-122.2-100.0166.7-150.00.0-42.90.0-0.0-0.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-800000.0-700000.0-500000.0-400000.0-300000.0-300000.0-100000.0-100000.00.00.00.00.0
Percentage of DerivativeGainLossOnDerivativeNet114.3-116.7500.044.4-100.050.0-50.00.00.00.0-0.0-0.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-50-400000000
Percentage of DerivativeGainLossOnDerivativeNet-0.00.05300.0-0.0-1366.7-0.00.00.014.3-100.00.0-0.0-0.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-600000.0-600000.0-600000.0-600000.0-600000.0-600000.0-600000.0-500000.0-600000.0-600000.0-500000.0-600000.0-500000.0
Percentage of DerivativeGainLossOnDerivativeNet85.7-100.0600.066.7-200.0100.0-300.00.0-85.7-300.0-250.0200.0250.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-19-19-18-17-17-18-16-16-15-15-15-15-14
Percentage of DerivativeGainLossOnDerivativeNet2742.9-3316.718800.01988.9-5900.03000.0-8350.00.0-2271.4-7550.0-7800.05033.37300.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-100-2-1-200110-20
Percentage of DerivativeGainLossOnDerivativeNet214.3-50.0600.0233.3-500.0350.00.00.0271.4700.0-250.0666.7300.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-100000.0-400000.0-600000.0-700000.0-800000.0-600000.0-600000.0-500000.0-100000.00.0100000.0200000.0300000.0
Percentage of DerivativeGainLossOnDerivativeNet14.3-66.7600.077.8-266.7100.0-300.00.0-14.30.050.0-66.7-150.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InvestmentIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.00.0100000.0400000.0400000.0800000.01000000.01000000.0
Percentage of DerivativeGainLossOnDerivativeNet-0.00.0-0.0-0.00.0-0.00.00.057.1200.0400.0-333.3-500.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CreditDefaultSwap, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value800000.0300000.0200000.0-100000.0-500000.00.0-300000.00.0-100000.0100000.0-100000.0-300000.0-200000.0-300000.0-400000.00.0600000.0100000.0-300000.0-300000.0400000.0100000.0-400000.0-400000.0-400000.0-1000000.0
Percentage of DerivativeGainLossOnDerivativeNet-114.350.0-200.011.1-166.7-0.0-150.00.0-50.050.033.3150.0-10.0-300.036.4-0.01.6-10.0-37.527.3-66.7-14.3-3.1100.00.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-8614-1105-176-2966826910-5-4-27-2-3-15-2128120
Percentage of DerivativeGainLossOnDerivativeNet12414.32450.011100.088.91833.32883.33050.00.04650.03350.0-2066.7-4300.01330.09700.0-927.3224.0-12.22730.0-250.0354.52550.0328.697.6-2125.00.030.0

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-100000000000100-10-110-100000
Percentage of DerivativeGainLossOnDerivativeNet214.350.0200.088.9233.3100.0250.00.0150.050.066.7-100.095.0300.063.652.01.4110.0137.572.7166.7114.30.0-0.00.0-0.0

us-gaap:HedgingDesignation

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-8715-11-15-176-296582899-6-3-28-1-5-15-312811-1
Percentage of DerivativeGainLossOnDerivativeNet12514.32550.011100.0188.91900.02983.33150.00.04750.03450.0-1933.3-4250.01430.09800.0-827.3276.0-9.22830.0-150.0454.52650.0428.694.5-2025.00.0130.0

us-gaap:StatementEquityComponents

us-gaap:DividendsCash

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value585959555756565052515145464646444545454142414237383531292930272727272425
Percentage of DividendsCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value-8614-1105-176-2-1966826910-5-4-27-2-3-15-2128012619-312-33-414241-23183544140
Percentage of EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci

us-gaap:AssetBackedSecurities



Period End2020-03-31
Value-200000.0
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci100.0

us-gaap:CorporateDebtSecurities



Period End2020-03-31
Value-2
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci1100.0

us-gaap:DebtSecurities



Period End2020-03-31
Value-400000.0
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci200.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-31
Value-900000.0
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci450.0

us-gaap:PublicUtilityBonds



Period End2020-03-31
Value0.0
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci-0.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-31
Value2
Percentage of FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci-1450.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.00.00.00.00.00.0-200000.00.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.0100.00.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000100000003-1-90200100
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000100000003-1-90200100
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000000000000000008002
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value000000000000000001000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.00.00.00.00.00.00.00.00.00.00.00.0-100000.00.00.00.00.00.00.00.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value0-100000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.00.00.00.0100.00.0100.00.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-50-1821613-68-6-16-22-2214513-4581915-77-13-45122-21726
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss6325.01240.0-337.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1200.00.05833.30.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-49-1751421-63-9-17-30-2113614-5342321-83-16-56191102638
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss6225.01146.7-687.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-5900.00.08933.30.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.00.00.00.00.00.00.0-100000.0100000.00.00.00.00.00.00.0-100000.0100000.00.00.0-100000.00.00.0-100000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss-0.0-0.0-0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.050.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000000010-1000001
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss112.5-6.7-0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-400.00.0266.70.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value003-274-10-60001-4-314-41-432023
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss37.5-0.0-450.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1050.00.0800.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value220-1000-100-20200-2-646256
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss-350.0-186.7-0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-3350.00.01800.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value000000-9000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.0100.00.00.00.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value205719004809030380095058030000104879
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-16.70.00.00.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2058320048090303808950580424000-704879
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.083.30.00.00.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000030000000000000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000000080000040000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value001300000000000120000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.00.00.00.00.00.0500000.0100000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.0100.0100.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value03719293121371117332936492457287861501550176129
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.012300.029600.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value047192930213712173329365224582810961511662176229
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.012560.029700.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000000000000000010003
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.03500.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value010000000000001500011000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000010000300000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.020.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000000000150000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0140.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value49-25620000900
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3100.0100.0100.00.00.0100.00.0100.00.00.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2364476595364973584094668639023714341132664128250322536549857416259409
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3480.1-172.3123.40.00.00.00.00.093200.00.00.00.00.00.00.00.00.00.00.00.00.00.04525.00.00.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value303-37222676244349454458736133576322256292418873377550234486799131521317487
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3616.7145.7359.20.00.00.00.00.0147340.00.00.00.00.00.00.00.00.00.00.00.00.00.05668.50.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000032000000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel30.0-0.00.00.00.00.00.00.06540.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value18-818480208-8166492004713348112-119622329447912130073965877
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel336.6318.4135.80.00.00.00.00.040180.00.00.00.00.00.00.00.00.00.00.00.00.00.01043.50.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0250280360523600300000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel30.0-100.40.00.00.07320.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-31
Value7000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3100.00.00.00.00.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value254-132690841019-15725553859520169283657-74697379602-24456586284-55198696816
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel33432.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value280-1328702181096-197367702711157288452822-6280551273864552894353-97278798871
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel33793.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.00.00.00.00.00.00.0100000.00.00.00.00.00.00.0200000.00.00.00.00.00.00.00.00.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value000000000005300000-424400
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value6018011376-39112163116471181687512107491028988308690357230
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel381.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value13000008900890029340700002925
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3179.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:EmbeddedDerivativeFinancialInstruments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-8614-1105-176-2-1966826910-5-4-27-2-3-15-2128
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:CommercialRealEstate



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove65To75Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove75To85Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove85Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioBelowOrEqualTo65Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:CommercialRealEstate



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove65To75Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove75To85Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove85Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0

us-gaap:CommercialRealEstate, unm:LoanToValueRatioBelowOrEqualTo65Percent



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value00000000000000000-1600-1-10-1-10-1-2-1000-10-2
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value28101021100000000000000000000000
Percentage of GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GainLossOnInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1449-26-71-416-2-211981128115-20-2-260-15-1712569-2613102421-2127-23-315271-2925
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1449-26-71-416-2-211981128115-20-2-260-15-1712569-26
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0001000002501
Percentage of GainLossOnInvestments-0.03.33.1-15.172.7-0.56.0-34.6-0.019.353.13.710.9

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-137-410-10-10000
Percentage of GainLossOnInvestments9.284.818.3-15.1-27.32.4-4.542.313.60.00.00.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0010-300002000
Percentage of GainLossOnInvestments-0.0-4.3-6.5-8.2-318.2-0.00.0-0.0-4.520.20.00.01.8

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-100-2-1-200110-20
Percentage of GainLossOnInvestments1.0-3.32.328.8-136.45.10.0-11.5-86.412.3-5.1-24.7-5.5

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value00-2-50-100003601-1-1-111-20-1
Percentage of GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments0.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value04000000030000200200
Percentage of GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments0.0-500.0-8.0-0.0-0.0-0.0-0.00.0-0.00.0-0.3-150.021.4-0.0-200.018.20.0-119.0-600.07.7

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0-8088230185-24107-41050-3-3-27
Percentage of GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments0.01087.50.0-356.0-157.7-733.3-283.3-55.60.0-1620.00.0-68.1-5100.0500.0400.0-1000.0-490.98.1176.23500.02115.4

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment

us-gaap:CommercialRealEstate



Period End2020-03-312019-03-31
Value02
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment0.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2432-21-1625367-101-6156-5525-369235-45-38831622-20161-2333120136401168339-1-48173-146-2491
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedInvestmentIncomeReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value9259-521359590-64909554-6710910352-551038664-651049051-5486969610011250-1011012639774874
Percentage of IncreaseDecreaseInAccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInCashCollateralForLoanedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value487-627-107-110-69-74-14-2-67-8-34-102410503306-417-3-13
Percentage of IncreaseDecreaseInCashCollateralForLoanedSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredPolicyAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value162622-30717017316616616516915715415316214514714615214413914014514212712410117113-518201220131316131521
Percentage of IncreaseDecreaseInDeferredPolicyAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInsuranceLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value6773591529091810107183931041151289463981136029106987372291120197167112971001841551055819482
Percentage of IncreaseDecreaseInInsuranceLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-12181-4450-35-355975-1102165-181630-6-30146113-69806027-6223-68-32-592390-14953320-103
Percentage of IncreaseDecreaseInOtherAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value8-3050-6710-85142-8129-17213-11318101113-7527-33139-85-49-17154-101-14130-1-33-4587-24-19-35-12-7-58
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InsuranceCommissions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value279270277284290275276273282266262261270255256255259248246244256238232229236222220238227230232220217224215214207218204203212216
Percentage of InsuranceCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDebtExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value454646424242424240404039393945423838383837383852373737373635353535373935343334273032
Percentage of InterestAndDebtExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7777778111110111111
Percentage of InterestAndDebtExpense16.015.716.718.118.316.919.926.928.426.728.428.628.6

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3333333333333
Percentage of InterestAndDebtExpense7.97.77.68.58.68.38.48.59.08.79.09.09.0

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value600000.0500000.0600000.0500000.0500000.0500000.0600000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0400000.0500000.0400000.0500000.0400000.0500000.0500000.0400000.0500000.0400000.0500000.0400000.0
Percentage of InterestAndDebtExpense1.31.11.31.21.21.21.41.21.21.21.31.31.31.10.91.31.01.31.11.31.31.00.91.10.01.1

us-gaap:InvestmentIncomeInterestAndDividend



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value596627609635607620631635615632619632614629622634618647623641614643622643627630640635633648634
Percentage of InvestmentIncomeInterestAndDividend100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

srt:PartnershipInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10124122710125838
Percentage of InvestmentIncomeInterestAndDividend1.71.90.82.00.41.21.72.00.91.30.61.3

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value539557546564544557560565557571564572563577573579563594573592566594578589581
Percentage of InvestmentIncomeInterestAndDividend90.588.889.688.989.889.888.888.990.590.491.290.591.791.792.191.391.291.892.092.492.292.493.091.792.6

us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value20181918171816161514141413121212111011111010101099897
Percentage of InvestmentIncomeInterestAndDividend3.42.93.12.82.92.92.62.52.52.32.32.22.22.02.02.01.91.61.81.81.81.61.61.61.60.01.41.41.2

us-gaap:EquitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-170004-21000000
Percentage of InvestmentIncomeInterestAndDividend-2.90.10.00.10.7-0.40.30.1-0.00.10.10.00.0

us-gaap:MortgageReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2926252426252729272725252526303026312627282925262827282726
Percentage of InvestmentIncomeInterestAndDividend4.94.24.23.94.44.24.44.64.44.34.24.04.14.24.94.74.44.94.34.34.64.54.14.14.50.04.54.24.1

us-gaap:OtherLongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value300303112106136706105743421133427
Percentage of InvestmentIncomeInterestAndDividend0.50.10.00.5-0.10.50.20.20.31.71.12.11.01.1-0.11.01.60.91.10.80.60.70.41.90.60.00.60.41.2

us-gaap:PolicyLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value45544444444444444444444434433
Percentage of InvestmentIncomeInterestAndDividend0.80.90.80.80.80.80.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.70.60.60.00.60.60.6

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value66867676333211221100000000000
Percentage of InvestmentIncomeInterestAndDividend1.11.11.41.11.21.01.30.90.60.50.60.40.30.20.40.30.20.20.10.10.10.10.10.10.10.00.10.10.1

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
Value8877988898788877877787768767667
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:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value239221226223226219224220221199221215207211210202207211205205213213206200201196194197187195206198198201193194191197206201196190
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value368811747644328765684582322693647532283665603496270
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value145394010281102143993799210981400932100311061369947101411041385
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NatureOfExpense

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

us-gaap:OperatingExpense



Period End2020-03-312019-03-31
Value16231747
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1100.0100.0

us-gaap:ConsolidationItems

us-gaap:OperatingIncomeLoss

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value346370350359352351366357343372357353339346325338328322328321321323312338324309312
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, unm:ClosedBlock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value294626333134322928332632313428323328273626302636282625
Percentage of OperatingIncomeLoss8.612.47.79.48.89.98.88.38.48.97.59.29.310.08.89.610.28.78.411.48.39.38.410.88.78.78.2

us-gaap:OperatingSegments, unm:ColonialLife



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value818787848585848481798181827979777777767777747174796969
Percentage of OperatingIncomeLoss23.423.724.923.524.224.323.023.723.621.222.923.124.223.024.323.023.524.123.224.124.223.022.822.124.322.422.1

us-gaap:OperatingSegments, unm:UnumInternational



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value192324302930262729
Percentage of OperatingIncomeLoss5.66.56.98.58.38.77.17.78.7

us-gaap:OperatingSegments, unm:UnumUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value261263261254252248270251243264258247239240231227215214218202214212214215207217219
Percentage of OperatingIncomeLoss75.671.174.570.871.670.874.070.371.070.972.470.170.369.271.067.065.766.566.663.066.765.768.663.863.970.270.2

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-45-50-48-43-45-48-47-35-40-33-36-37-39-37-41-35-31-34-26-33-29-31-32-28-26-39-32
Percentage of OperatingIncomeLoss-13.3-13.6-13.9-12.2-12.9-13.7-12.9-9.9-11.7-8.9-10.1-10.6-11.7-10.8-12.8-10.5-9.7-10.7-8.2-10.4-9.3-9.7-10.5-8.4-8.2-12.9-10.5

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-1666-22280010471245-332-305-635-104210566373176-1337277921800-635-168-1267350308-152572710-151-1425-278594564-197
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:ComponentOfNetUnrealizedGainOnSecurities

unm:DeferredAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value252-7-14-1432710-50-4-217-3-10-1210114-512-5-71175
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-1.5-0.9-1.0-1.4-1.2-1.1-0.9-1.1-1.0-4.9-0.6-1.3-1.1-1.3-1.3-1.1-1.6-1.7-1.1-1.2-1.70.5-1.6-1.0-1.0-0.7-1.2-2.1

unm:ReserveForFuturePolicyAndContractBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1903531-878-1004-1230464-3176631064-37-109-480-2141522-196-1112-88810713311532-363-753185-642-8314601481297
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-114.2-238.9-109.8-95.9-98.8-139.8104.2-104.4-102.2-35.4-165.2-128.8-121.0-113.8-71.0-120.6-111.0-168.6-197.0-120.9-103.8-244.0-121.7-112.2-117.1-304.4-104.0-106.9

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-2103-280100913271571-421-385-804-13178995566261-202539014051198-967-237-1925565466-2218651096-249-2144-417
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax126.2126.4126.2126.7126.2126.8126.4126.7126.485.0144.5151.8147.5151.5141.0152.4149.8152.3141.1152.0161.4151.1145.4151.1154.4164.7150.5149.9

us-gaap:DeferredIncomeTaxCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value55-49-36-78-81-61503562-10-7-43-21183-62-112-126-25-24147-6210624-93-99-8023450
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-3.322.0-4.6-7.5-6.51.9-49.3-5.6-6.0-9.6-11.2-11.8-12.3-13.7-22.4-12.2-15.83.914.4-11.7-17.834.6-16.2-16.2-14.052.9-16.4-18.2

us-gaap:ReinsuranceRecoverable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-102-9485767-11-14-32-544102514-58135547-44-4-752222-739
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax6.14.26.05.55.43.64.95.25.34.016.56.78.14.44.96.15.97.12.85.96.57.44.96.9

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-22019313528731228-565-131-2345007542-3621422222344546-302124-171-39175189131-496-81
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax13.2-87.216.927.425.1-8.5185.320.722.547.8-1.220.124.027.151.324.229.3-7.2-27.623.835.4-55.625.830.726.7-87.134.929.1

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-436-58209279326-89-80-169-274-63920689-690113479414-330-89-654182141-91304371-119-89-734-159
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-2861988626231745-583-186-18582711158-496117143182125-25092-419-74193203-151181-270-142
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3-531104202-1-52-1-10-8501000-11-21610011022131
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-1.1-26.91.50.4-0.393.0-0.1-1.10.6-645.1-3.7-1.3-1.017.20.31.00.331.63.60.51.251.6-1.9-0.4-0.1-73.31.6-78.8-1.2

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value37-413-4420-7-3-2000-15521-11271519-1285-38-1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-13.2-1.530.50.8-2.6-1.6-8.5-28.9-3.0-4.6-0.00.1-0.1-8.7284.284.94.429.8-3.6-26.7-6.34.2-3.6-1.8-3.20.8

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-26318911828030510-564-131-2345147644-3621432222232247-302118-174-35176187-293113-493-73
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax92.095.3136.9106.896.323.196.770.5126.5622.016.168.676.473.0121.5154.3123.01205.3187.3121.0127.341.547.791.192.2194.262.7182.451.4

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-6363-37-1917-21-15-614710313917-48-25-79-26-27-4464-54-43-6030726680-69
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax22.232.0-43.3-7.55.5-46.62.633.1-25.6131.7116.535.729.29.8-21.9-55.2-14.5-1421.1-175.7-26.0-58.310.580.915.63.7-17.437.5-0.349.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-6363-37-1917-21-15-614710313917-48-25-79-26-27-4464-54-43-60307680-6929-1828
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2100000000000000000000000
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0100.00.00.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-2541908925931154-592-193-19231910451-501110139184-518-25794-382-83177199192-269-142189145-6
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value7-5054246463-49212-823432203-174200122110
Percentage of OtherComprehensiveIncomeLossNetOfTax-2.8-26.56.01.80.985.8-0.8-3.3-1.6-1550.011.31.75.116.52.72.91.7-42.415.1-0.23.345.6-2.5-0.10.30.6-82.2-7.5

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value22-200-16-6-8-8-13-12-10-7-8-8-26-2713-2020714-281-85-2
Percentage of OtherComprehensiveIncomeLossNetOfTax-9.0-6.61.12.83.54.6-262.5-71.1-11.8-20.81.5-7.6-5.9-14.2459.372.07.922.2-2.0-16.8-16.10.9-4.3-2.21.4

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-22019313528731228-565-131-2345007542-3621422222344546-302124-171-39175189131-496-81
Percentage of OtherComprehensiveIncomeLossNetOfTax86.7101.7151.4110.5100.152.195.467.9121.71575.0-4.172.082.572.3128.1160.1126.8-774.6250.0117.6131.944.947.199.195.168.3184.757.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value-2541908925931154-592-193-19231910451-501110139184-518-25794-382-83177199-142-6
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-6363-37-1917-21-15-614710313917-48-25-79-26-27-4464-54-43-60307680-69
Percentage of OtherComprehensiveIncomeLossNetOfTax25.033.4-42.1-7.65.5-39.02.631.9-24.7337.5163.938.133.39.7-23.3-57.1-14.3457.6-237.1-25.3-57.411.572.317.03.835.4-0.349.1

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-750-5-4-2-46-4-6-349-2-1-282-3-4-3-2-20-3174-200-1-221-10-6-7-6
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1120-10-13-1-2012-1-1-139-1-2-10-10-193000-600-118-5
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value19-261-1216-1063-1-12-4
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value235248227229237233212220224232193206230212205207205209200210193265187190188178187194193196181193196195204190203196205198209205
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:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0000000000000000000000000-1-1
Percentage of OtherCostAndExpenseOperating-0.00.0-0.00.0-0.00.0-0.00.0-0.0-0.1-0.1-0.0-0.1-0.10.0-0.0-0.0-0.10.0-0.00.0-0.2-0.2-0.2-0.20.0-0.6

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value544445555555544443323111122
Percentage of OtherCostAndExpenseOperating2.11.92.02.02.02.42.62.52.52.22.62.42.21.92.01.92.01.41.51.41.60.50.70.70.70.01.5

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-2-23-37-9-11-4573-12-1522-2-6-12-7-6-150-14-9-318-4-1-1-8-60
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value5301800000921109841300000
Percentage of OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet100.00.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

us-gaap:PaymentsForLossesAndLossAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value18211751177617471768170316771680172216251650163816531612161716011656
Percentage of PaymentsForLossesAndLossAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-15-38-82170217-287-194732-450103-77340-1032-642675-70210-16746-25945-102-146273-25617-52421727251-208-178199206-426
Percentage of PaymentsForProceedsFromShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value78082283574567860977491071185888210351030127995969256775390472184589883987882512551300825752970
Percentage of PaymentsToAcquireAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1442132019953174139218901601338495144172175846614867127134153995435292110115852183933752
Percentage of PaymentsToAcquireOtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value111211111180140113010801100500171410
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value41410085814413695807111053469712560720568693586568348698554696468535272501510518596400510355984343390274276191
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 End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-17-16-14-12-14-10-15-10-15-9-10-8-9-6-10-8-9-5-10-6-6-4-8-6-401300020000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value489184531331039317582100655848799188781038911142764258574233353838273635719745
Percentage of ProceedsFromSaleAndMaturityOfOtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value12036184133311171541845130936427533815710894669519315812724339817387463335467516107
Percentage of ProceedsFromSaleOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed



Period End2020-03-31
Value2
Percentage of ProvisionForLoanLossesExpensed100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialRealEstate



Period End2020-03-31
Value2
Percentage of ProvisionForLoanLossesExpensed107.7

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanToValue

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove65To75Percent



Period End2020-03-31
Value1
Percentage of ProvisionForLoanLossesExpensed73.1

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove75To85Percent



Period End2020-03-31
Value-100000.0
Percentage of ProvisionForLoanLossesExpensed-3.8

us-gaap:CommercialRealEstate, unm:LoanToValueRatioAbove85Percent



Period End2020-03-31
Value300000.0
Percentage of ProvisionForLoanLossesExpensed11.5

us-gaap:CommercialRealEstate, unm:LoanToValueRatioBelowOrEqualTo65Percent



Period End2020-03-31
Value700000.0
Percentage of ProvisionForLoanLossesExpensed26.9

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-318-235-88765777564-2767-1-3781633-11
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap: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-3-3-4-3-3-4-4-4-4-3-3-3-3-2-2-2-2-1-1-1-2-4200001
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax12.3-37.8164.0-120.0-67.948.9-51.8-60.6-63.2-66.0-40.5-45.1-45.1-47.3-38.2-52.1100.0-24.4-29.2-25.7153.8113.9-7.9-3.7-18.9-24.2-15.3

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value141513121111758878810327967516665
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-47.2298.1-151.1141.2162.0172.1154.074.7125.4112.7143.6125.0166.7-396.2416.7121.5131.4-515.4-20.166.399.4183.8190.9-45.9

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-42-4-16-6-6-170000512000-10-2200-6-230-2-2-17
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax134.8-54.9656.0-213.3-130.2202.310.6-1.4-8.812.065.819.732.43.613.2-14.6396.2-292.37.7-5.7461.56.241.64.3-64.9-66.7161.3

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value956767560812549456834911556591243416813116
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value16051524148715451556141014781399154313761274128214891340117012851447
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:NatureofClaimIncurred

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

unm:AmountRelatedtoInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value271242248265280242255268283253265275295260276291308
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:ForeignCurrency



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-127144-59-4941-40-25-1167217526729-89-48-148-53
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense-46.959.5-24.1-18.714.7-16.7-10.0-43.525.56.919.924.410.1-34.5-17.4-51.1-17.3

unm:IncurredClaims



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-126-46-25-71-130-40165-38-192-142714-184-125119-15-176
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense-46.6-19.0-10.4-27.1-46.5-16.764.8-14.5-67.7-5.910.35.2-62.5-48.343.2-5.2-57.4

us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value010010010010015001001001001001001001031001001001001151031080100100100951752328197129000
Percentage of TreasuryStockValueAcquiredCostMethod0.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value000000000000000011111000001111110
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AccidentAndHealthActiveLifeReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1224612210120921200811909118371152110895107741065810532103931027110172100539922980497049263822577637259-6451-5999-5606
Percentage of AccidentAndHealthActiveLifeReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value1207168817161477109579582682090311699439311280950612
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedLossPositionGrossLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value416142528803031851871385321372164127
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedLossPositionGrossLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value343456445433387300298322372453728671654628590538496449442457400394428345271
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedLossPositionGrossLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value182414752498041392218231571062015235121627
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedLossPositionGrossLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value3627419544773750299723152458277032614041273429804347473248224328351239923923218318912051311323271394
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedLossPositionGrossLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value46434446313035524320611344195167354265117115143151146192193102193433
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedLossPositionGrossLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value3971339701393833934339000387513832238163383753790737909376413765637447374463730137524373403750537280368513657836610365293641336430362403629535865358233535234826343833400633982339703393033498334893276032491
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

unm:AvailableForSaleSecuritiesDebtMaturitiesFairValueGrossSubtotal

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value354544428944589425563734828799305553155840699
Percentage of AvailableForSaleSecuritiesDebtMaturitiesFairValueGrossSubtotal100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value839116751331231758771262910888100962784
Percentage of AvailableForSaleSecuritiesDebtMaturitiesFairValueGrossSubtotal23.73.83.05.415.743.935.632.06.8

unm:AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGainGrossSubtotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5198635466565678449534253597393045605695448247086574698870596253534157245571372832523388483736362289
Percentage of AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGainGrossSubtotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossLossGrossSubtotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value106690118147269748475439278118286267455590167156216265169217236-136276589
Percentage of AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossLossGrossSubtotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value19141717151413172330152123212314171613171810141210
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedLossPositionGrossLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value3013985543000000000000021
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedLossPositionGrossLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1291011061058467576881105216220275289318319338344386359311338406386313
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedLossPositionGrossLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value0000282115144120000053200013
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedLossPositionGrossLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:HeirarchyLevelCombination

unm:AvailableForSaleSecuritiesPercentOfTotalFairValue

unm:FairValueInputsLevel2OrLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-09-302016-06-30
Value0.0390.040.040.0960.0980.0970.0980.1030.1050.1030.110.1090.115
Percentage of AvailableForSaleSecuritiesPercentOfTotalFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:FairValueInputsOtherThanLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0.8280.9010.8030.7640.7740.8830.7950.8090.7930.7830.8030.7570.8020.781
Percentage of AvailableForSaleSecuritiesPercentOfTotalFairValue2123.12252.52007.5795.8789.8910.3811.2785.40.0745.7779.6688.2735.8679.1

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-03-31
Value0.1720.0990.1970.2360.2260.1170.2050.1910.2070.0920.2170.1970.2430.0920.1980.2190.2090.0680.1590.1720.1720.0660.1690.1320.110.183
Percentage of AvailableForSaleSecuritiesPercentOfTotalFairValue441.0247.5492.5245.8230.6120.6209.2185.40.00.0206.7191.3220.90.0181.7190.40.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, unm:FairValueAssetsAndLiabilitiesComponents

us-gaap:FairValueInputsLevel2, unm:OtherObservableMarketData



Period End2020-03-312019-12-312019-09-302019-06-30
Value0.0950.0910.090.037
Percentage of AvailableForSaleSecuritiesPercentOfTotalFairValue243.6227.5225.038.5

us-gaap:FairValueInputsLevel2, unm:PricingService



Period End2020-03-312019-12-312019-09-302019-06-30
Value0.6940.770.6730.631
Percentage of AvailableForSaleSecuritiesPercentOfTotalFairValue1779.51925.01682.5657.3

unm:AvailableForSaleSecuritiesUnrealizedLossPositionGrossLossSubtotal



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value106791271756496455293123
Percentage of AvailableForSaleSecuritiesUnrealizedLossPositionGrossLossSubtotal100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableforsaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGain



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value53286455458034923654399846415800
Percentage of AvailableforsaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGain100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique

unm:DebtSecuritiesAvailableforsalePrivate

us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value105119120203208148223215244
Percentage of DebtSecuritiesAvailableforsalePrivate100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

unm:FinancialInstrumentsFinancialAssetsFairValueDisclosureCarryingValue

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value628062536140
Percentage of FinancialInstrumentsFinancialAssetsFairValueDisclosureCarryingValue100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

unm:FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value253225742341
Percentage of FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value396239693922
Percentage of FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal156.5154.2167.5

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value649465446264
Percentage of FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal256.5254.2267.5

us-gaap:ExternalCreditRatingByGrouping

unm:FixedMaturitySecuritiesInUnrealizedLossPositionPercentOfTotal

us-gaap:ExternalCreditRatingInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.6090.2580.150.3940.6450.70.8280.7750.6780.5380.4760.4280.6690.6940.1870.220.4120.5610.4960.6530.1950.3810.5630.7740.8120.815
Percentage of FixedMaturitySecuritiesInUnrealizedLossPositionPercentOfTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingNonInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.3910.7420.850.6060.3550.30.1720.2250.3220.4620.5240.5720.3310.3060.8130.780.5880.4390.5040.3470.8050.6190.4370.2260.1880.185
Percentage of FixedMaturitySecuritiesInUnrealizedLossPositionPercentOfTotal64.2287.6566.7153.855.042.920.829.047.585.9110.1133.649.544.1434.8354.5142.778.3101.653.1412.8162.577.629.223.222.7

unm:LifeReservesForFuturePolicyAndContractBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value8428843583968335831583308303827682788231820981368105807880317970795979467850774075717454-7380-7247-7128
Percentage of LifeReservesForFuturePolicyAndContractBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

unm:MiscellaneousLongTermInvestments

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value341824
Percentage of MiscellaneousLongTermInvestments100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value515891
Percentage of MiscellaneousLongTermInvestments150.3315.7379.7

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value8576115
Percentage of MiscellaneousLongTermInvestments250.3415.7479.7

us-gaap:FairValueByMeasurementFrequency

unm:MiscellaneousLongTermInvestmentsCarryingValue

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value8576115
Percentage of MiscellaneousLongTermInvestmentsCarryingValue100.0100.0100.0

us-gaap:ExternalCreditRatingByGrouping

unm:NumberOfFixedMaturitySecuritiesInUnrealizedLossPositionContinuouslyForOverOneYear

us-gaap:ExternalCreditRatingInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8.019.013.059.0204.0174.0137.0141.0134.0109.016.016.016.017.037.027.014.09.08.09.031.048.071.016.016.0
Percentage of NumberOfFixedMaturitySecuritiesInUnrealizedLossPositionContinuouslyForOverOneYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingNonInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value14.024.033.041.032.023.020.020.021.027.030.032.037.043.050.034.032.027.013.013.015.014.018.010.08.0
Percentage of NumberOfFixedMaturitySecuritiesInUnrealizedLossPositionContinuouslyForOverOneYear175.0126.3253.869.515.713.214.614.215.724.8187.5200.0231.2252.9135.1125.9228.6300.0162.5144.448.429.225.462.550.0

us-gaap:InternalCreditAssessment

unm:PercentageOfLoanPortfolio

unm:BBBCreditRating



Period End2020-03-312019-12-31
Value0.7830.797
Percentage of PercentageOfLoanPortfolio100.0100.0

unm:BBCreditRating



Period End2020-03-312019-12-31
Value0.0120.0
Percentage of PercentageOfLoanPortfolio1.50.0

unm:BCreditRating



Period End2020-03-312019-12-31
Value0.0070.0
Percentage of PercentageOfLoanPortfolio0.90.0

unm:CreditRating



Period End2020-03-312019-12-31
Value0.1980.203
Percentage of PercentageOfLoanPortfolio25.325.5

us-gaap:LoanToValue

unm:LoanToValueRatioAbove65To75Percent



Period End2020-03-312019-12-31
Value0.4460.439
Percentage of PercentageOfLoanPortfolio57.055.1

unm:LoanToValueRatioAbove75To85Percent



Period End2020-03-312019-12-31
Value0.0170.038
Percentage of PercentageOfLoanPortfolio2.24.8

unm:LoanToValueRatioAbove85Percent



Period End2020-03-312019-12-31
Value0.030.016
Percentage of PercentageOfLoanPortfolio3.82.0

us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty

srt:ApartmentBuilding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.2630.2540.2310.2240.2140.2140.1930.180.163
Percentage of PercentageOfLoanPortfolio33.631.90.00.00.00.00.00.00.0

srt:IndustrialProperty



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.250.260.2620.2630.2660.2770.2820.2820.272
Percentage of PercentageOfLoanPortfolio31.932.60.00.00.00.00.00.00.0

srt:OfficeBuilding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.2210.2290.2420.260.2650.2630.2650.2760.313
Percentage of PercentageOfLoanPortfolio28.228.70.00.00.00.00.00.00.0

srt:OtherProperty



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0190.020.020.0210.020.020.020.0140.014
Percentage of PercentageOfLoanPortfolio2.42.50.00.00.00.00.00.00.0

srt:RetailSite



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.2470.2370.2450.2320.2350.2260.240.2480.238
Percentage of PercentageOfLoanPortfolio31.529.70.00.00.00.00.00.00.0

us-gaap:StatementGeographical

unm:EastNorthCentral



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.1410.1370.1250.154
Percentage of PercentageOfLoanPortfolio18.017.20.00.0

unm:EastSouthCentral



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.0460.0480.050.046
Percentage of PercentageOfLoanPortfolio5.96.00.00.0

unm:MiddleAtlantic



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.0850.0770.0730.07
Percentage of PercentageOfLoanPortfolio10.99.70.00.0

unm:Mountain



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.1040.1120.1130.106
Percentage of PercentageOfLoanPortfolio13.314.10.00.0

unm:NewEngland



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.0170.0120.0180.02
Percentage of PercentageOfLoanPortfolio2.21.50.00.0

unm:Pacific



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.2060.2090.2050.205
Percentage of PercentageOfLoanPortfolio26.326.20.00.0

unm:SouthAtlantic



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.2070.2120.2270.211
Percentage of PercentageOfLoanPortfolio26.426.60.00.0

unm:WestNorthCentral



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.0860.090.0930.083
Percentage of PercentageOfLoanPortfolio11.011.30.00.0

unm:WestSouthCentral



Period End2020-03-312019-12-312019-09-302018-12-31
Value0.1080.1030.0960.105
Percentage of PercentageOfLoanPortfolio13.812.90.00.0

unm:PolicyAndContractBenefits



Period End2020-03-312019-12-312019-03-312018-12-312017-12-31
Value17601745170816951605
Percentage of PolicyAndContractBenefits100.0100.0100.0100.0100.0

unm:PolicyLoansCededtoReinsurers



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value34513490347633483390344934513277330633073306315031883206317830663094315031653007304230683043
Percentage of PolicyLoansCededtoReinsurers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

unm:TotalFinancialInstrumentLiabilitiesNotCarriedatFairValue

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312018-12-31
Value336729283077
Percentage of TotalFinancialInstrumentLiabilitiesNotCarriedatFairValue100.0100.0100.0

unm:UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3899580363345455445132203684336740305094505749484467425357755578446635786150410862775245-3108-1644803
Percentage of UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AccountsAndFinancingReceivableAllowanceForCreditLoss

unm:UnfundedMortgageLoanCommitments



Period End2020-03-312020-01-01
Value100000.0300000.0
Percentage of AccountsAndFinancingReceivableAllowanceForCreditLoss100.0100.0

us-gaap:AccountsReceivableNet



Period End2020-03-312020-01-012019-12-31
Value322310
Percentage of AccountsReceivableNet100.0100.0100.0

us-gaap:AccruedInvestmentIncomeReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value748693695803742690683797745690692808752693694803754702698803752696702796756700700788741694696779736681695766730669685744704642605
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialRealEstate



Period End2020-03-312019-12-31
Value88
Percentage of AccruedInvestmentIncomeReceivable1.11.2

unm:ComponentOfNetUnrealizedGainOnSecurities

us-gaap:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

unm:DeferredAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-37-62-64-57-42-27-31-34-41-51-51-46-45-40-38-56-52-42-29-40-41-56-50-52-54-48-41-42-43-61-67
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:ReserveForFuturePolicyAndContractBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-3899-5803-6334-5455-4451-3220-3684-3367-4030-5094-5094-5057-4948-4467-4253-5775-5578-4466-3578-4649-4981-6513-6150-5396-5582-4939-4108-4037-4498-5979-6277
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax10426.59255.39790.19571.410448.411542.311698.19874.29781.89911.99911.910946.810803.910922.510933.710295.010625.910634.512171.411624.211917.711508.712106.910318.910204.810101.69876.29433.610269.69770.89369.4

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4261636466455635430827363158354343485665567755875492492546646690629948943695466349016826626157946016515040544410465968037221
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-11393.6-10150.6-10270.9-9886.7-10113.6-9808.2-10025.7-10392.1-10553.9-11021.8-11045.3-12094.6-11991.7-12043.0-11991.3-11925.8-11999.0-11653.6-12570.4-11658.5-11725.4-12061.5-12325.8-11079.9-10998.4-10533.3-9747.1-10304.7-10638.4-11117.5-10778.4

us-gaap:DeferredIncomeTaxCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-251-307-258-221-143-62-55-206-241-304-313-303-296-252-230-414-352-239-113-88-63-211-149-255-280-187-88-242-162-397-447
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax673.0490.3399.4388.6336.6222.6176.8604.4586.9592.6610.1656.9646.5616.6592.5738.3670.5570.7384.7220.2152.6373.7293.3488.9512.6383.2212.3567.3371.7648.7668.4

us-gaap:ReinsuranceRecoverable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value322424434385328261273288321375375371360335321379366310263308312387365342349309263351
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-862.8-677.4-670.9-676.7-771.1-936.9-867.6-844.9-779.1-731.1-731.1-804.3-787.6-820.5-826.0-676.8-697.1-738.6-895.2-770.2-748.6-685.3-718.5-654.1-638.9-633.7-634.1-524.6

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value3956154222860-312-340224356590607557558483440803661438204158112414290462501325135427295792873
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax-1057.0-982.3-652.4-503.30.21119.71081.6-658.4-864.3-1148.4-1182.5-1206.5-1218.8-1180.9-1132.6-1431.7-1259.2-1043.8-694.9-396.5-268.2-732.0-571.5-883.4-916.3-665.2-326.2-998.6-674.9-1294.8-1303.7

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value2357234823422335232823212314230823022303229522822277227222632258225322472239223522302221265126462640263426232619261326072604260026002591258025772572261526112607260325872546
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AdvancesFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-31
Value0.0
Percentage of AdvancesFairValueDisclosure0.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-31
Value451
Percentage of AdvancesFairValueDisclosure0.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-31
Value0.0
Percentage of AdvancesFairValueDisclosure0.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-31
Value451
Percentage of AdvancesFairValueDisclosure0.0

us-gaap:AllowanceForLoanAndLeaseLossesRealEstate



Period End2020-03-312019-12-31
Value110
Percentage of AllowanceForLoanAndLeaseLossesRealEstate100.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:AlternativeInvestment

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:FairValueMeasurementsRecurring, us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value638616557540494483466446407
Percentage of AlternativeInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value638616557540494483466446
Percentage of AlternativeInvestment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument, unm:PrivateEquityFundType

us-gaap:PrivateEquityFunds, unm:PrivateCredit



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value270263204206194
Percentage of AlternativeInvestment42.442.736.738.340.2

us-gaap:PrivateEquityFunds, unm:RealAssets



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value199204201186161
Percentage of AlternativeInvestment31.233.136.234.633.3

us-gaap:FinancialInstrument, unm:PrivateEquityFundType, unm:RedemptionTerm

us-gaap:PrivateEquityFunds, unm:PrivateCredit, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value233223172171168
Percentage of AlternativeInvestment36.636.330.931.734.8

us-gaap:PrivateEquityFunds, unm:PrivateCredit, unm:Quarterlyafter2yearlockwith90daysnotice



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value3739323525
Percentage of AlternativeInvestment5.86.45.86.65.3

us-gaap:PrivateEquityFunds, unm:PrivateEquityLimitedPartnership, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value168149151146128
Percentage of AlternativeInvestment26.324.227.227.226.5

us-gaap:PrivateEquityFunds, unm:RealAssets, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value168173171156131
Percentage of AlternativeInvestment26.528.230.728.927.1

us-gaap:PrivateEquityFunds, unm:RealAssets, unm:Quarterly



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value3030303030
Percentage of AlternativeInvestment4.84.95.55.66.2

us-gaap:AssetsFairValueDisclosure



Period End2020-03-312019-12-312018-12-31
Value460324812043555
Percentage of AssetsFairValueDisclosure100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value78174698935310954101685031882683114170
Percentage of AssetsFairValueDisclosure17.09.80.00.00.011.60.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value368654208837519343053389436402331613402539936
Percentage of AssetsFairValueDisclosure80.187.50.00.00.083.60.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value71171762812397771637113210761381
Percentage of AssetsFairValueDisclosure1.51.50.00.00.03.80.00.00.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value638616557540494483466446407
Percentage of AssetsFairValueDisclosure1.41.30.00.00.01.10.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value532864556763578345803492365439984641
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingByGrouping

us-gaap:ExternalCreditRatingInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value5273627066095664449734643577391145275628550654374948476466086354522042644975496767096238
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax99.097.197.797.998.299.297.997.897.60.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ExternalCreditRatingNonInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value5418415411983287787113172191174138118165110987380149207148
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax1.02.92.32.11.80.82.12.22.40.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value303742114290362327531981219523593633
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax57.065.263.462.660.156.760.159.00.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value12910110610584675768105
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.41.61.61.81.81.91.61.70.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value532864556763578345803492365439985800
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value174175239199188162156165191
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.32.73.53.44.14.74.34.10.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value123113031396121710278508519471296
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax23.120.220.621.122.424.323.323.70.0

us-gaap:RedeemablePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value001111113
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.00.00.00.00.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value528507534478389307280325395
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax9.97.97.98.38.58.87.78.10.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value227156195159135123113132176
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax4.32.42.92.83.03.53.13.30.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value106791118148271756496455293
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingByGrouping

us-gaap:ExternalCreditRatingInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value65023175817552941135219866525110815115361743601941401747
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax60.925.815.039.464.570.082.877.567.80.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ExternalCreditRatingNonInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value4176710089962268510294575768536668129249281197757277
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax39.174.285.060.635.530.017.222.532.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10117311012723866438437699
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax94.881.093.386.187.687.877.582.70.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value00002821154
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.10.40.20.30.71.14.23.40.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value106791118148271756496455123
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value210134120
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.21.10.31.11.10.60.30.50.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4285182463534212
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax4.09.04.812.39.08.410.89.40.0

us-gaap:RedeemablePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value600000.00.00.00.00.0200000.0200000.0200000.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.10.00.00.00.00.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value971004941
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.98.01.10.20.10.62.00.90.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000041025144
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.40.30.01.51.45.23.10.0

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
Value410304107940789408044047440275399133981740151397803983439626396973955239625395623980439658397383966939025388033892038289
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:FinancialInstrument

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value282382827328038281262782227436273062726926988
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis68.868.868.768.968.768.168.468.567.8

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value131613771406146114731523159116531873
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.23.43.43.63.63.84.04.24.7

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value410304107940789408044047440275399133981739780
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value786843812806822825644660673
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.92.12.02.02.02.11.61.71.7

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value636164366424641464516626659266216952
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis15.515.715.815.715.916.516.516.617.5

us-gaap:RedeemablePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value433939393939393939
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.10.10.10.10.10.10.10.10.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value312928632415222921512121204920321942
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.67.05.95.55.35.35.15.14.9

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value115512461652172717141702169115411311
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis2.83.04.14.24.24.24.23.93.3

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value7644761071952021028073
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0000171253
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.00.41.03.511.76.64.5

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-31
Value81507812425315210183
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss106.6112.5103.7116.5125.6149.1126.8114.4

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000101100
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.01.10.00.51.00.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value55216223219114
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss6.612.53.715.011.615.919.413.96.4

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000002210
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.00.00.11.12.21.61.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9352934204246228229626
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0000019101
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.11.40.60.50.20.33.23.55.2

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-31
Value98640392350234435340
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss105.4140.2114.9114.1108.7121.8119.3149.3

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value210033020
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.23.41.21.97.10.80.20.71.5

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3722213133317
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss4.08.98.510.24.56.811.910.629.5

us-gaap:RedeemablePreferredStock



Period End2020-03-312018-12-312018-09-302018-06-30
Value600000.0200000.0200000.0200000.0
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.10.00.10.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value971002720
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss1.025.13.81.50.50.52.70.91.9

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value723857949943812549240783980311355
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value434712263581515350252
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue0.68.12.56.02.80.96.64.418.6

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-31
Value8279130586057310391978394912037
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue114.4225.3172.3130.8112.5124.8118.2150.4

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4693105458345913
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue0.112.00.82.44.40.60.40.71.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value67116812092101740633608213
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue9.329.124.221.08.18.08.17.615.7

us-gaap:RedeemablePreferredStock



Period End2020-03-312018-12-312018-09-302018-06-30
Value22181010
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue0.30.20.10.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2993311346918335913645
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue4.157.226.91.40.82.04.61.73.4

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

us-gaap:AllOtherCorporateBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1193794711652383017041164724785
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0334415020121298144
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.10.80.72.73.911.818.313.618.4

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-31
Value15542048718152521183210531144
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue130.6110.6103.4109.9147.9157.5145.5145.8

us-gaap:ForeignGovernmentDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000110121200
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.00.70.00.71.10.00.0

us-gaap:PublicUtilityBonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value363712105400325228149133
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue30.49.72.76.410.419.119.620.717.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0000965342322
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.10.10.00.00.33.82.93.32.8

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value13288135701350313336129071257312558123261227312091118141148411177109911107310941106691051910103100571000295329566961996409492905293259756975297769394965996309563976197449501979196439833
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value102711488114727139521124368127993769011916
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value380836346683326786251520552681291
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue37.12.43.26.023.891.865.168.510.8

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value63226286594262286433626760625908566555795531549561216231630463216657651467556882678468716938707071867098702767035927592256135782528151615061489347804740460844884142
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value496364236081623262445186534553585810
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value15202772593775261301973833204
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue30.64.34.36.18.425.118.215.63.5

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1899619023186501869618620188371870818774187411861118813189461901818886187551870019040191941944119102187811880218939188911874518936192771911019121191921897119011188251849918687186451855618570182881793617881
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value191642215222486213051888815779162661739521333
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value29941031596107725995017465839411275
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue15.64.72.75.113.831.828.622.76.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value11068211286108210391073992115516941625174917151339133813131338115711121204123812831372116594784190388211561059956990638617715669670849685801692634
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value105583212941065972102094911141638
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6839307259505214
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue6.50.40.72.97.55.85.44.70.9

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value13161377140614611473152315911653177618731925198420412104217822612279231822322389217422242309235521021858194716391767192721052285250426342764288230383047315132543413
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:DebtSecuritiesAvailableforsaleUnrealizedGainLossFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

unm:AvailableForSaleSecuritiesUnrealizedGainPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value14011428149714951370129989812561576
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

unm:AvailableForSaleSecuritiesUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value43501570185283728449397
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue3.13.51.04.713.521.881.035.725.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value452914744347435464404478243011430714336044500454574542245118446234421746315458624469943354444014457045852450644471544900436664234444973
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingByGrouping

us-gaap:AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

us-gaap:ExternalCreditRatingInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value336.0109.079.0105.0552.0550.0499.0413.0226.0206.0226.0299.0332.0147.054.0145.0269.0212.0213.042.075.094.080.0148.0245.0
Percentage of AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExternalCreditRatingNonInvestmentGrade



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value127.038.052.051.0135.091.0104.088.047.037.048.059.069.055.078.084.0100.0112.082.052.068.068.021.038.053.0
Percentage of AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions137.834.965.848.624.516.520.821.320.818.021.219.720.837.4144.457.937.252.838.5123.890.772.326.225.721.6

us-gaap:CollateralizedFinancings



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value5112412823830738239639840439740644045042541541040973
Percentage of CollateralizedFinancings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss



Period End2020-03-312019-12-31
Value480
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss100.00.0

us-gaap:FinancialInstrument

us-gaap:AllOtherCorporateBonds



Period End2020-03-31
Value48
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss100.0

us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

us-gaap:DebtSecuritiesAvailableForSaleMeasurementInput

srt:Maximum, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0020.04560.08640.04770.00250.00250.00250.00250.0025
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Maximum, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputEntityCreditRisk, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.06940.17680.0050.14410.12540.10990.05560.05810.0625
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput3470.0387.75.8302.15016.04396.02224.02324.02500.0

srt:Minimum, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0020.04560.08640.04770.00250.00250.00250.00250.0025
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputEntityCreditRisk, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.00080.00350.00350.00250.0020.00250.0014-0.00810.0012
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput40.07.74.15.280.0100.056.0-324.048.0

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0020.04560.08640.04770.00250.00250.00250.00250.0025
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:CorporateDebtSecurities, us-gaap:MeasurementInputEntityCreditRisk, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0070.0220.00420.01060.010.010.00560.00420.005
Percentage of DebtSecuritiesAvailableForSaleMeasurementInput350.048.24.922.2400.0400.0224.0168.0200.0

us-gaap:DeferredIncomeTaxAssetsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value47000301091570
Percentage of DeferredIncomeTaxAssetsNet100.00.00.00.0100.0100.0100.00.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-31
Value9395
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613



Period End2020-01-012019-12-31
Value9095
Percentage of DeferredIncomeTaxLiabilitiesNet0.0100.0

us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:RestatementAdjustment, us-gaap:AccountingStandardsUpdate201613



Period End2020-01-01
Value-5
Percentage of DeferredIncomeTaxLiabilitiesNet0.0

us-gaap:DeferredPolicyAcquisitionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value23332324230723012298230922762244221321842155212321132094204820232015200819601937190419011866184518321829180417821753175517281711169923002572255725422521249124842486248224722381
Percentage of DeferredPolicyAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value9220318829416219520284125178190246198211247264234231270261234204189188198212534
Percentage of DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value100000000000000000233500008
Percentage of DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value5923302819241835324548544755859975656059547378606477452
Percentage of DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value32180157266142170184499313214219215015516116515816520719717712511012713313472
Percentage of DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value9220318829416219520284125178190246198211247264234231270261234204189188198212534
Percentage of DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value872734272430202521192027293237404049573953281024366281108118111137143858199154136
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312018-12-31
Value872730
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForwardContracts



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CreditDefaultSwap



Period End2020-03-312019-12-312019-03-312018-12-312018-09-30
Value10000
Percentage of DerivativeAssets1.51.80.41.62.4

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CurrencySwap



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8527272430202519
Percentage of DerivativeAssets97.098.2100.099.698.497.6100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForwardContracts



Period End2020-03-31
Value400000.0
Percentage of DerivativeAssets0.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-31
Value900000.0
Percentage of DerivativeAssets1.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForwardContracts



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForwardContracts



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-31
Value0.0
Percentage of DerivativeAssets0.0

us-gaap:FinancialInstrument

us-gaap:CreditDefaultSwap



Period End2020-03-312019-12-312018-12-31
Value100
Percentage of DerivativeAssets1.51.81.6

us-gaap:CurrencySwap



Period End2020-03-312019-12-312018-12-31
Value852730
Percentage of DerivativeAssets97.098.298.4

us-gaap:ForwardContracts



Period End2020-03-31
Value400000.0
Percentage of DerivativeAssets0.5

us-gaap:InterestRateSwap



Period End2020-03-31
Value900000.0
Percentage of DerivativeAssets1.0

us-gaap:DerivativeCollateralObligationToReturnCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value592328221924162016151521222528252736342528158321-100015344245039
Percentage of DerivativeCollateralObligationToReturnCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0

us-gaap:FinancialInstrument

us-gaap:Cash



Period End2020-03-312019-12-312019-09-302018-12-31
Value59242824
Percentage of DerivativeCollateralObligationToReturnCash100.0102.1100.0100.0

us-gaap:DerivativeCollateralObligationToReturnSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value27465464554467781513122010217687972
Percentage of DerivativeCollateralObligationToReturnSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value112830303333433946
Percentage of DerivativeCollateralObligationToReturnSecurities43.2715.0493.4596.1697.9484.1990.9774.51104.8

us-gaap:TransactionType

us-gaap:DerivativeCollateralRightToReclaimSecurities

us-gaap:OverTheCounter



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value323132322833413739424640423741404135375267
Percentage of DerivativeCollateralRightToReclaimSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value872734272430202521192027293237404049573953281511101024366281
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:OtherLongTermInvestments, us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value36192119192518222119
Percentage of DerivativeFairValueOfDerivativeAsset41.070.562.271.978.980.987.690.598.6100.0

us-gaap:OtherLongTermInvestments, us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value47712755220
Percentage of DerivativeFairValueOfDerivativeAsset53.627.636.728.120.717.510.09.51.4

us-gaap:OtherLongTermInvestments, us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value900000.00.00.00.00.00.00.00.00.00.0
Percentage of DerivativeFairValueOfDerivativeAsset1.00.00.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherLongTermInvestments, us-gaap:CreditRiskContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value100000
Percentage of DerivativeFairValueOfDerivativeAsset1.51.80.60.41.62.4

us-gaap:OtherLongTermInvestments, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2000000
Percentage of DerivativeFairValueOfDerivativeAsset2.50.00.60.00.00.00.0

us-gaap:OtherLongTermInvestments, us-gaap:ForwardContracts, us-gaap:Nondesignated



Period End2020-03-31
Value400000.0
Percentage of DerivativeFairValueOfDerivativeAsset0.5

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:OtherLongTermInvestments, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value487127552200
Percentage of DerivativeFairValueOfDerivativeAsset54.627.636.728.120.717.510.09.51.40.0

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:OtherLongTermInvestments, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value842734272430202521192027293237404049573953281511101024366281137
Percentage of DerivativeFairValueOfDerivativeAsset95.698.298.9100.099.698.497.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherLongTermInvestments, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3000000
Percentage of DerivativeFairValueOfDerivativeAsset4.41.81.10.00.41.62.4

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value100000000000000000233500000000
Percentage of DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherLiabilities, us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value36699714121719
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value253200000
Percentage of DerivativeFairValueOfDerivativeLiability90.675.850.025.84.15.14.80.80.0

us-gaap:OtherLiabilities, us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0011357775
Percentage of DerivativeFairValueOfDerivativeLiability0.09.115.216.537.865.849.757.540.226.3

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:CreditRiskContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value00000000000000011111
Percentage of DerivativeFairValueOfDerivativeLiability0.00.00.00.00.00.01.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherLiabilities, us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value1092237262531131917152531384673839387835553493432445365657783135
Percentage of DerivativeFairValueOfDerivativeLiability3428.1345.5568.2272.2261.2393.793.9156.7101.182.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherLiabilities, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2622222221242326262727313131333332313231323130
Percentage of DerivativeFairValueOfDerivativeLiability828.1339.4347.0230.9221.4310.1161.9208.7154.0141.80.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherLiabilities, us-gaap:ForwardContracts, us-gaap:Nondesignated



Period End2020-03-31
Value0.0
Percentage of DerivativeFairValueOfDerivativeLiability0.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2544458775
Percentage of DerivativeFairValueOfDerivativeLiability90.684.865.242.341.870.954.458.340.226.3

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value612111314132220242424202020212325182342386075131115133141137156170173
Percentage of DerivativeFairValueOfDerivativeLiability190.6184.8166.7142.3142.9170.9154.4159.1141.4126.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherLiabilities, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1364560484755374644435363707910811612611911688878266344655666578
Percentage of DerivativeFairValueOfDerivativeLiability4256.2684.8915.2503.1482.7703.8255.8365.4255.2224.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TransactionType

us-gaap:OverTheCounter



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value323433363538464651525252535255575850567492
Percentage of DerivativeFairValueOfDerivativeLiability1018.8524.2513.6373.2364.3481.0316.3367.7295.4269.10.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TransactionType

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

us-gaap:OverTheCounter



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value03147448129612101514161614192125
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities



Period End2020-03-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value14257696877849199129140151137139130125142188208202234254289292297309275290289295286258262
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CurrencySwap



Period End2020-03-312019-12-312018-12-31
Value323432
Percentage of DerivativeLiabilities22.959.247.5

us-gaap:EmbeddedDerivativeFinancialInstruments



Period End2020-03-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1092231152531384673839387835553493432445383
Percentage of DerivativeLiabilities77.139.745.023.332.637.841.846.956.859.361.663.659.542.842.834.90.00.00.028.233.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CurrencySwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value323432343132393946
Percentage of DerivativeLiabilities22.959.20.00.00.047.50.00.068.9

us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value109223726253113191715
Percentage of DerivativeLiabilities77.139.70.00.00.045.00.00.00.023.3

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value323433363538464652
Percentage of DerivativeLiabilities22.960.30.00.00.055.00.00.076.7

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1092237262531131915
Percentage of DerivativeLiabilities77.139.70.00.00.045.00.00.023.3

us-gaap:TransactionType

us-gaap:OverTheCounter



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value323433363538464651525252535255575850567492
Percentage of DerivativeLiabilities22.960.30.00.00.055.00.00.00.076.767.462.258.253.143.240.738.436.440.557.265.1

us-gaap:DerivativeNetLiabilityPositionAggregateFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value32343336353846465152525253525557585056747192107133117135142137157170182165174173154203206199165135144
Percentage of DerivativeNetLiabilityPositionAggregateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value9318819308198087997958089041052
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk

us-gaap:CreditDefaultSwap, us-gaap:CreditRiskContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value1011101011111107070
Percentage of DerivativeNotionalAmount1.11.31.11.31.41.41.40.07.76.7

us-gaap:CreditDerivativesByContractType, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CreditDefaultSwap, us-gaap:CreditRiskContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302018-12-31
Value10111011
Percentage of DerivativeNotionalAmount1.11.31.11.4

us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value781020130020010
Percentage of DerivativeNotionalAmount0.81.011.10.01.60.00.02.50.01.0

us-gaap:DerivativeInstrumentRisk, unm:InterestRateDerivativesContractType

us-gaap:InterestRateSwap, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value663611567558533538534537536616
Percentage of DerivativeNotionalAmount71.269.360.968.266.167.367.266.559.358.6

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302018-12-31
Value213213219286
Percentage of DerivativeNotionalAmount22.924.223.635.8

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302018-12-31
Value30124919978
Percentage of DerivativeNotionalAmount32.428.321.59.8

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForwardContracts, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-30
Value788
Percentage of DerivativeNotionalAmount0.81.01.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, unm:InterestRateDerivativesContractType

us-gaap:InterestRateSwap, us-gaap:Nondesignated, unm:DerivativeFinancialInstrumentsReceiveFixedPayFixed



Period End2020-03-312019-12-312019-09-302018-12-31
Value148148148173
Percentage of DerivativeNotionalAmount15.916.815.921.7

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:ValuationTechnique

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability

us-gaap:FairValueInputsLevel3, us-gaap:DerivativeFinancialInstrumentsLiabilities, us-gaap:ValuationTechniqueDiscountedCashFlow



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-109-22-37-26-25-31-13-19-15
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNi



Period End2020-03-312019-12-312018-12-31
Value143229
Percentage of EquitySecuritiesFvNi100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value400027014140
Percentage of EquitySecuritiesFvNi31.50.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5282727024121210
Percentage of EquitySecuritiesFvNi37.685.90.00.00.084.20.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value444444111
Percentage of EquitySecuritiesFvNi30.914.10.00.00.015.80.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:ValuationTechnique

us-gaap:FairValueInputsLevel3, us-gaap:EquitySecurities, us-gaap:MarketApproachValuationTechnique



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value444444111
Percentage of EquitySecuritiesFvNi30.914.10.00.00.015.80.00.00.0

unm:CreditExposure

us-gaap:FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets

unm:CreditExposure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1000000
Percentage of FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets100.00.0100.00.00.0100.00.0

us-gaap:FinancialInstrument

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value524475537369365385351378
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument, unm:PrivateEquityFundType

us-gaap:PrivateEquityFunds, unm:PrivateCredit



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value14415221180109
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments27.632.139.421.928.5

us-gaap:PrivateEquityFunds, unm:RealAssets



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value170155159113106
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments32.532.829.630.927.5

us-gaap:FinancialInstrument, unm:PrivateEquityFundType, unm:RedemptionTerm

us-gaap:PrivateEquityFunds, unm:PrivateCredit, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1411522057899
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments27.032.138.321.425.8

us-gaap:PrivateEquityFunds, unm:PrivateCredit, unm:Quarterlyafter2yearlockwith90daysnotice



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value306110
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments0.60.01.20.52.7

us-gaap:PrivateEquityFunds, unm:PrivateEquityLimitedPartnership, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value209166166174169
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments39.935.131.047.344.0

us-gaap:PrivateEquityFunds, unm:RealAssets, unm:NotRedeemable



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value145130134113106
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments27.727.524.930.927.5

us-gaap:PrivateEquityFunds, unm:RealAssets, unm:Quarterly



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value25252500
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments4.85.34.70.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:AssetBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value753461000000090000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.00.00.0100.0100.0100.00.00.0100.00.0100.0100.0100.0

us-gaap:CorporateDebtSecurities



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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value55360042110144961495891