MCO


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments, us-gaap:SubsegmentsConsolidationItems
us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:SubsegmentsConsolidationItems
us-gaap:TimingOfTransferOfGoodOrService

us-gaap:Revenues

us-gaap:CostOfRevenue

us-gaap:OperatingExpenses
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:FinancialInstrument

us-gaap:ShortTermInvestments
us-gaap:FinancialInstrument

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:LongTermInvestments

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:DividendsPayableCurrent

us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

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

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

mco:AcceleratedShareRepurchaseProgramRemainingNotYetSettled

mco:AdjustedOperatingIncome
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

mco:CashPaidResultingInReductionOfNoncontrollingInterestOwnership

mco:EffectOfExchangeRateOnDeferredRevenue
us-gaap:StatementBusinessSegments
us-gaap:AwardType
mco:EmployeeServiceShareBasedCompensationTaxBenefitFromVestingOfOtherThanStockOptions

mco:IncreaseDecreaseinContractwithCustomerLiabilityExcludingEffectofExchangeRate
us-gaap:StatementBusinessSegments
mco:NumberOfLinesOfBusinesses
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
mco:OtherComprehensiveIncomeLossAmountOfGainLossOnDerivativesArisingDuringPeriodNetOfTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

mco:OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossBeforeReclassificationAfterTax

mco:OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossReclassificationAfterTax

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationAndTax

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationNetOfTax

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationTax

mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationNetOfTax

mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationNetofTax

mco:OtherNonOperatingIncomeExpenseOther

mco:PensionExpenseNetPeriodicPensionCostsOther

mco:PercentageOfRevenues
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mco:UnrecognizedTaxBenefitsAndOtherNonCurrentTaxLiabilitiesPeriodIncreaseDecrease

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination
us-gaap:StatementBusinessSegments

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress
us-gaap:StatementBusinessSegments

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:StatementBusinessSegments

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DepreciationAndAmortization
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
us-gaap:IncomeStatementLocation
us-gaap:GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments

us-gaap:GainLossOnSaleOfBusiness
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:GoodwillAcquiredDuringPeriod
us-gaap:StatementBusinessSegments

us-gaap:GoodwillTranslationAndPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

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

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxesPaid

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInContractWithCustomerLiability
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInRestructuringReserve

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndOtherIncome

us-gaap:InterestExpenseBorrowings

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestPaidNet

us-gaap:LeaseCost

us-gaap:NumberOfReportableSegments

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:ProceedsFromIssuanceOfCommercialPaper

us-gaap:ProceedsFromNotesPayable

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockPlans

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfCommercialPaper

us-gaap:RepaymentsOfNotesPayable

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome
us-gaap:AcceleratedShareRepurchasesDate, us-gaap:ShareRepurchaseProgram
us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease
us-gaap:IncomeTaxAuthority

us-gaap:VariableLeaseCost

mco:CustomerBillingsAndPaymentsReceivedInAdvance

mco:DisposalGroupIncludingDiscontinuedOperationIndemnificationProvisionLiability

us-gaap:AccruedBonusesCurrent

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedRoyaltiesCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

us-gaap:BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CapitalizedContractCostNetCurrent

us-gaap:CapitalizedContractCostNetNoncurrent

us-gaap:CommercialPaper

us-gaap:ContractWithCustomerLiability
us-gaap:StatementBusinessSegments

us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:StatementBusinessSegments

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:StatementBusinessSegments

us-gaap:DebtInstrumentFaceAmount
us-gaap:LongtermDebtType
us-gaap:ShortTermDebtType

us-gaap:DebtInstrumentFairValue
us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:LongtermDebtType
us-gaap:ShortTermDebtType

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear
us-gaap:RetirementPlanType

us-gaap:DepositAssets

us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType, us-gaap:VariableRate
us-gaap:DerivativeAverageFixedInterestRate

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:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability
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:HedgingDesignation

us-gaap:DerivativeLiabilities
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType, us-gaap:VariableRate
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:SubsequentEventType
us-gaap:DividendsPayableAmountPerShare

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquitySecuritiesFvNi
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiCost
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure

us-gaap:GoodwillGross
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority

us-gaap:InterestPayableCurrent

us-gaap:InterestRateDerivativeAssetsAtFairValue

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:InterestRateDerivativesAtFairValueNet
us-gaap:LongtermDebtType

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap:LongtermDebtType

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OtherAccruedLiabilitiesNoncurrent
us-gaap:FinancialInstrument
us-gaap:OtherAssets

us-gaap:OtherAssetsMiscellaneousCurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidTaxes

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveNoncurrent
us-gaap:StatementBusinessSegments
us-gaap:RevenueRemainingPerformanceObligation

us-gaap:ShortTermBorrowings
us-gaap:ShortTermDebtType

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockShares

us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:LongtermDebtType
us-gaap:StatementBusinessSegments
us-gaap:UnbilledReceivablesCurrent

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄3333333333NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█████████▁3423423423423423423423423423NANANA342NANANA342NANANA342NANANA342NANANA342NANANA342NANANANA342NANANA342NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock███▁▁▁█▁▁▁155155154-153-153-151151-151-151-151NANANA-152NANANA-146NANANA-138NANANA-128NANANA-119NANANA-120NANANANA-112NANANA-106NANANA
us-gaap:CommonStockSharesAuthorized ▄▄▄▄▄▄▄▄▄▄1000100010001000100010001000100010001000NANANA1000100010001000100010001000NA1000NANANA1000NANANA1000NANANA10NANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 189NA191191192NA194194194NA194193194NA194195197NA202204206NA214215218NA222226227NA226227227NA229231231231NA235236239NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 187NA189189190NA191191191NA191191191NA191193195NA199201202NA210212214NA217222223NA222223223NA226228228228NA234235236NANANANA
us-gaap:EarningsPerShareBasic █▇▇▇▇▆▇▇▇▄▇▇▇▁▆▆▆▆▆▆▆▆▆▆▆▆▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅2.61.912.011.641.961.311.621.961.950.131.661.631.81-2.251.331.320.951.111.161.31.141.141.021.511.020.960.841.010.840.720.830.770.780.430.580.830.830.680.590.580.510.480.430.430.460.38
us-gaap:EarningsPerShareDiluted █▇▇▇▇▆▇▇▇▄▇▇▇▁▆▆▆▆▆▆▆▆▆▆▆▆▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅2.571.881.991.621.931.291.591.941.920.131.631.611.78-2.251.311.30.931.091.141.281.111.121.01.481.00.940.831.00.830.70.810.760.760.430.570.820.820.670.580.580.510.470.430.420.460.38
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
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us-gaap:NetIncomeLoss █▇▇▇▇▆▇▇▇▄▇▇▇▁▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▅▆▆▆▅▅▆▆▅▅▅▅▅▅▅▅▅48835937931037225031037637225317312345-4282552551842172312612302362153192182061832251881601831721739613018918915513713612111310110010990
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▁▃▆▃▂▄▃▃▆▆▄▃▂▆▃▄▄▄▄▄▃█▆█▆▄▄▄▄▃▄▆▄-113102113321031222221535322221232NA1111NA111NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets █▇▇▇▇▇▆▆▆▆▆▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁11306102659477959195189526843987519014859483046536543553275019504451145123477249994976466949934786435343954154379439113960366229632994287625212744274425242540NANANA2003NANANA
us-gaap:Liabilities █▇▆▇▇▇▆▆▆▆▆▅▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁1050194288774901691938869783382918594870984617003616063545377541454665456501351025122462643753990385339673781325833713492327127852833297426952761276127472838NANANA2599NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▇▆▆▆▆▆▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁11306102659477959195189526843987519014859483046536543553275019504451145123477249994976466949934786435343954154379439113960366229632994287625212744274425242540NANANA2003NANANA
us-gaap:StockholdersEquity ██▇▇▆▇▇▇▆▄▄▃▂▁▄▃▃▄▄▄▄▅▇▇▇▇▇▇▇▇▇▆▆▅▅▆▆▅▄582612472352123459400242199-327-369-679-927-1225-564-600-581-565-469-331-373-1872504453853372814474573853119982-169-184-26-26-231-309NANANA-606NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent█▁14354NANA5433NANANA-1NANANA35NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▇▆▅▅▄▅▄▄▄▄▃█▆▅▅▅▅▅▄▅▅▄▅▄▄▅▄▃▄▄▃▁▁▁▁▁▁▁▁399436793042315428983386251628392818258022784559348532533016303030853243286230643039268630612944294529682782244225202525220515191526142413601543154313391343NANANA1012NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▄▃▃▃▄▂▃▃▂▂█▅▅▄▄▄▄▃▄▄▃▅▄▄▅▄▄▄▄▄▂▂▂▂▂▂▂▁▂▁▁▁214118321178119511961685103413141277107196232802129205117461674157617571471153815091219194017771792191918351633175817551518824814760854938938719659793485496473NANANA
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FinancialInstrument us-gaap:CertificatesOfDeposit█▆▂▂▃▆▁1176866327327432904202NANA238NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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 us-gaap:ShortTermInvestments us-gaap:FinancialInstrument us-gaap:CertificatesOfDeposit▁▃▁▅▇█▇879588104110115110NANA111NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ██▇▇▇▇▆▆▇▆▅▅▅▄▄▄▄▄▃▄▄▄▃▃▃▃▂▂▃▃▂▂▂▂▁▂▂▂▂14131419122812451301128711311137120711471007916953887831843852802720801842792712758737694592607637621549530589489400492492503497NANANA444NANANA
us-gaap:OtherAssetsCurrent ██▇█▇▆▅▇▅▆▅▆▆▃▃▄▄▄▄▄▄▄▄▄▃▃▂▃▂▂▁▂▁▂▁▁▁▁▃35033028633528628223828623325020027526914012715916617916317516417219717711911498147819168109687749565667127NANANA51NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ███▇█▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁853839816797834790767748731706681645620595581560541518501489467451414414391375343343328314297286274258244232232214200NANANA164NANANA
us-gaap:PropertyPlantAndEquipmentNet ▂▃▃▄▆▆▅▅▇▇███▇█▇▅▅▅▄▄▄▄▄▂▁▂▂▃▅▆▆▇▇▇▇▇▇▆285292292300318320311312321325332329329325329323310306306304299302303298282278284287296307315317324326323325325324319NANANA293NANANA
us-gaap:LongTermInvestments ▆▂▃▁▃▃▆▆▆▃▄▅▄▄██▇▇█▆▆▆▆▆49102052218454844222734333261595555584547484344NA0NANANANANANANANANANANANANANANANANANANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ██▇█▇▇▆▇▇▇▅▅▆▂▁▁▂▂▂▁▁▁▁▁▃▂▂▂▃▂▃▃121117113121111104981071009983808626181630282522232120173937353540384044NA37NANANANA30NANANA30NANANA
us-gaap:Goodwill █▇▇▇▇▇▇▇▇▇▇▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁41223722361036643762378136613662383137533722105410291023104010471050976990100698810211000955656665630619623637646638656642451470470463465NANANA349NANANA
 us-gaap:Goodwill us-gaap:StatementBusinessSegments mco:MoodysAnalytics█▇▇▇▇▇▇▇▇▇▇▁▁▁▁▁▁▁▁38083407329033523495352333893377353934683434768755746761762766691697NANA722NANANA653NANA612625635627645631440458458NA454NANANA338NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill █▇▇▇▇▇▇▇███▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁17091498145414861530156615171541164116311633287289296307319329299308322328345349310212221198202212226233238249253153166166167168NANANA104NANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:ComputerSoftwareIntangibleAsset▆▇▇▇▇▇▇▇███▁▁▁▁▁▁▁▁▁▁▁▁▁22824123623824125125225927928028328303236384227293133363729NA32NANANANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships█▇▇▇▇█▇▇███▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁121610901048107811301153111111251196118511811831841851921962011881922002032122151781451501281301371451491511571598794949595NANANA37NANANA
us-gaap:OtherAssetsNoncurrent █▅▆▄▄▄▃▄▄▂▂▃▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▁▁▁▁59438942531732127424325925815916817016611215415816216017315516614514214710611293891009610410090826158585255NANANA50NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesCurrent █▆▇▅▆▇▅▅▆▆▆▃▄█▃▂▂▃▂▂▂▃▂▂▂▂▁▁▂▂▂▂▂▂▁▁▁▁▁235119122138183920052098182318431920206319821237142324281402114611511218105011241138119910411093102711418978971013116498299510111134834852852841933NANANA1236NANANA
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us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▃▄▃▃▃▄▃▃▃▄▃▂▂█▂▂▂▃▂▂▂▃▂▂▁▃▁▁▁▃▂▁▁▂▁▁▁▁▂6647736075885376955815935327505774903921444450453391566409422379557420430312538337312355555362300302452311302302273414NANANA317NANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▇▅▆▄▆▅▄▄▅▄▄▃▃▆▅▄▃▄▄▃▃▄▅▆▄▂▁▂▁▁▁▄▃▂▂▂1191088593819591767882778161649588737078776660798795715743544643467860495454NA52NANANA62NANANA
us-gaap:AccruedIncomeTaxesCurrent █▇▅▇▆▆▇██▇▅▅▄▂▂▃▄▂▂▃▅▂▃▄▁▅▁▁▁▅▃▂▂▃▁▂▂91735675657179858679495340167214111122350162233047325562218122331212NA26NANANA20NANANA
us-gaap:DividendsPayableCurrent ▁▂▁▁▁▁▁▁▁▁▁▁▁█▂▁▁█▁▁▁█▁▁▁▇▁▁▁▅▁▁▁▄▁▁▁3765465446544787667866375444653324722238111NA27NANANA26NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LongTermDebt █▆▅▆▅▇▅▅▆▆▆▅▂▁▁630355815238525852285676492952345417541054064887386133633418NANA3393NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType mco:A375SeniorNoteDueTwoThousandAndTwentyFive693NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType mco:A950SeniorNotesDueTwoThousandAndThirty▁█814833NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent █▇▆▇▇▇▆▆▆▆▆▆▅▄▄▄▄▄▄▄▄▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁630355814736525852285226448449345118511151074887386130633118342034283401312431063095254725362104209721012098160516101607161111101137117212001228122812211228NANANA746NANANA
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us-gaap:OtherLiabilitiesNoncurrent ▂▄▄▄▄▆▆▇▆█▃▃▃▃▂▂▃▃▃▃▃▃▁▁▁▁▃▂▃▂▂▂▂▂▁▁▁▁▁403504492491486576574625554664447426434425412404422417417441444430348354355360426412421410386395405404357363363362362NANANA317NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ██▇▇▆▇▇▇▆▄▄▃▂▁▄▃▃▄▄▄▄▅▇▇▇▇▇▇▇▇▇▆▆▅▅▆▆▅▄582612472352123459400242199-327-369-679-927-1225-564-600-581-565-469-331-373-1872504453853372814474573853119982-169-184-26-26-231-309NANANA-606NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent█▁14354NANA5433NANANA-1NANANA35NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄3333333333NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship us-gaap:CurrencySwap,us-gaap:CashFlowHedging▄▄▄▄2222NA2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship us-gaap:InterestRateContract,us-gaap:CashFlowHedging▁███-37-2-2-2NA-2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship us-gaap:LongTermDebt,us-gaap:NetInvestmentHedging█▁█▃10-1311-6NA-3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship us-gaap:CashFlowHedging▁███████████-3500000222010NA1NANANA-1NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship us-gaap:NetInvestmentHedging█▃▇▁▃▁14354126245332NA15-12-1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:HedgingDesignation us-gaap:DesignatedAsHedgingInstrument▇▃█▁1085412624NA32NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇██▇▇▇▇▇▇▇▇█▁▇▇▇▆▆▇▇▆▇▆▇▆▇▇▆▆▇▆345479441387367376307385391404390464-512369327291237260299332261308251280177273284166202327260NA62NANANANA200NANANA164NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆█▇██▇████▁█████▇████▇▇█▇█▇████-772185-96-45-7-292-68-26-18-12-344721181044101-108-1010-42-49-320-131-31-82-39-203-16-2-4-20NA-13NANANANA-13NANANA-13NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▃▃▁▇▂▃▄▃█▇▇▄▄▃▃▅▃▃▅▂▅▃▄▄▅▄▄▄▇765-46-331-337-848568-512-285-182-289719623553-127-259-283-33951-354-281123-671107-279-222-15583-270-156-91436NA-7NANANANA-145NANANA-111NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇██▇▇▇▇▇▇▇▇█▁▇▇▇▆▆▇▇▆▇▆▇▆▇▇▆▆▇▆345479441387367376307385391404390464-512369327291237260299332261308251280177273284166202327260NA62NANANANA200NANANA164NANANANA
us-gaap:NetIncomeLoss █▇▇▇▇▆▇▇▇▄▇▇▇▁▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▅▆▆▆▅▅▆▆▅▅▅▅▅▅▅▅▅48835937931037225031037637225317312345-4282552551842172312612302362153192182061832251881601831721739613018918915513713612111310110010990
us-gaap:ProfitLoss █▇▇▇▇▆▇▇▇▄▇▇▇▁▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆48736138231237325231237737628319313345-425256258186220233264231241218324221209186228191162186175175NA132190190157NA137122114NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent█▁▂488359379NA373250310NANANANANANANANANANANANANANANANANANANANANANANANANANANA130189189155NA136121113NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁▂488359379NA373250310NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆█▇██▇████▁█████▇████▇▇█▇█▇████-772185-96-45-7-292-68-26-18-12-344721181044101-108-1010-42-49-320-131-31-82-39-203-16-2-4-20NA-13NANANANA-13NANANA-13NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▅▁▅▄▅▇▆▅▃▅▇▆▄██▇▇▆▆▅▄▄▄▄▄▂▂▁▁▁▃2182218202725221521262418303028262325211917181919111298913NA15NANANANA19NANANA16NANANANA
us-gaap:PaymentsToAcquireInvestments █▁▃▂▃▄▄78274031385050NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▃▃▁▇▂▃▄▃█▇▇▄▄▃▃▅▃▃▅▂▅▃▄▄▅▄▄▄▇765-46-331-337-848568-512-285-182-289719623553-127-259-283-33951-354-281123-671107-279-222-15583-270-156-91436NA-7NANANANA-145NANANA-111NANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▃▃▃▄▃▃▂▃▂▂▃▃▃▃▃▃▃▃▃▄▄▃▃▃█▁▁▂▃▂▃▂2532631121674485566374336297955591932232621923042343654403202582011640-397-259-9171251000NANANANA127NANANA29NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree▁▁▁▁▁▁▁█████0.026250.026250.026250.026250.026250.026250.026250.02650.02650.02650.02650.0265NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3333333333
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value3423423423423423423423423423342342342342342342342342342342
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value155155154-153-153-151151-151-151-151-152-146-138-128-119-120-112-106-107-91
Percentage of SharesIssued45.345.345.0-44.8-44.7-44.244.1-44.0-44.0-4467.6-44.4-42.8-40.4-37.6-34.9-35.1-32.7-30.9-31.4-26.7

Common Stock Shares Issued

Common Stock Shares Outstanding

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-31
Value1000100010001000100010001000100010001000100010001000100010001000100010001000100010
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value189191191192194194194194193194194195197202204206214215218222226227226227227229231231231235236239
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value187189189190191191191191191191191193195199201202210212214217222223222223223226228228228234235236
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2.61.912.011.641.961.311.621.961.950.131.661.631.81-2.251.331.320.951.111.161.31.141.141.021.511.020.960.841.010.840.720.830.770.780.430.580.830.830.680.590.580.510.480.430.430.460.38
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 End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2.571.881.991.621.931.291.591.941.920.131.631.611.78-2.251.311.30.931.091.141.281.111.121.01.481.00.940.831.00.830.70.810.760.760.430.570.820.820.670.580.580.510.470.430.420.460.38
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

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value129012331240121311421060108011751126116510621000975942917928816865834918865877816873767779705756731754688640646567531605605577564513477476485451450408
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-39-36-36-35-34-34-34-33-34-34-33
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-3.0-2.9-2.9-3.0-3.2-3.2-2.8-3.1-2.9-3.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-3.0-2.9-2.9-3.0-3.2-3.2-2.8-3.1-2.9-3.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value498515496477474467438425411445372
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.641.840.039.341.544.140.636.236.538.235.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.641.840.039.341.544.140.636.236.538.235.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value831754780771702627676782749754723
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.461.263.063.661.559.262.666.666.564.768.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.461.263.063.661.559.262.666.666.564.768.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

mco:RelationshipRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value721716683666660646619612602580534
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.958.155.154.957.861.057.352.153.549.850.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.958.155.154.957.861.057.352.153.549.850.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value569516557546481413461562523584528
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.141.944.945.142.239.042.747.946.550.249.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.141.944.945.142.239.042.747.946.550.249.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

mco:RelationshipRevenue, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value446439415406401387365355
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.635.633.533.535.136.633.830.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.635.633.533.535.136.633.830.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value275277268260260258254256
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.322.521.621.522.824.423.521.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.322.521.621.522.824.423.521.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5073786971777066
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.96.06.35.76.27.36.55.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.96.06.35.76.27.36.55.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value519442478477410336390495
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.235.938.639.435.931.836.142.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.235.938.639.435.931.836.142.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mco:AssetsBackedSecurities, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2225252523262427
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.72.02.02.12.02.52.32.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.72.02.02.12.02.52.32.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:AssetsBackedSecurities mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:BankLoans, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value89678983736978121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.95.57.26.96.46.57.310.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.95.57.26.96.46.57.310.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:BankLoans mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:CommercialRealEstateFinance, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1725172018231418
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.32.11.41.71.62.21.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.32.11.41.71.62.21.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:CommercialRealEstateFinance mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:HighYield, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7575566857193958
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.86.14.65.65.01.83.65.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.86.14.65.65.01.83.65.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:HighYield mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:Insurance, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3030312829153732
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.52.52.32.51.43.52.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.52.52.32.51.43.52.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:Insurance mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:InvestmentGrade, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value144801059597565472
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.26.58.57.98.55.35.16.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.26.58.57.98.55.35.16.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:InvestmentGrade mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:ManagedInvestments, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value65694657
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.50.80.40.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.50.80.40.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:ManagedInvestments mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:OtherProductLines, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value145139140139128145135138
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.311.311.511.213.812.511.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.311.311.511.213.812.511.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:OtherProductLines mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:OtherProductLines, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value33233333
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.30.30.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.30.30.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:OtherProductLines mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:OtherProductLines, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11011000
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:OtherProductLines mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:ProjectAndInfrastructure, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5260615547495356
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.04.95.04.64.14.75.04.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.04.95.04.64.14.75.04.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:ProjectAndInfrastructure mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:PublicFinanceSovereign, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5764575346414551
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.45.34.74.44.03.94.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.45.34.74.44.03.94.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:PublicFinanceSovereign mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:RelationshipRevenue, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-03-31
Value10698
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysAnalytics mco:EnterpriseRiskSolutions100.0100.0

mco:RelationshipRevenue, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-03-31
Value340303
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.426.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.426.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysAnalytics mco:ResearchDataAndAnalytics100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value115112110111106109107106
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.99.28.99.19.310.310.09.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.99.28.99.19.310.310.09.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6567646468636364
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.55.25.36.05.95.95.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.55.25.36.05.95.95.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value94
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService mco:MISOther100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4041373738373838
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.33.03.13.33.53.53.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.33.03.13.33.53.53.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4646474344444043
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.83.83.63.94.23.83.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.83.83.63.94.23.83.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:RelationshipRevenue mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:ResidentialMortgageBackedSecuritiesProduct, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2725222424232326
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.11.82.02.12.22.22.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.11.82.02.12.22.22.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:ResidentialMortgageBackedSecuritiesProduct mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:StructuredCredit, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2931404135475054
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.63.23.43.14.54.74.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.63.23.43.14.54.74.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:StructuredCredit mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-03-31
Value3224
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysAnalytics mco:EnterpriseRiskSolutions100.0100.0

mco:TransactionRevenue, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-03-31
Value185
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysAnalytics mco:ResearchDataAndAnalytics100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value338249281276249181199284
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.220.222.722.821.817.118.424.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.220.222.722.821.817.118.424.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6047556148245656
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.84.55.04.22.35.24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.84.55.04.22.35.24.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value21
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService mco:MISOther100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6983827155536069
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.86.65.94.85.05.65.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.86.65.94.85.05.65.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5062586857767385
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.95.04.75.65.07.26.87.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.95.04.75.65.07.26.87.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:TransactionRevenue mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Banking, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8675798480627277
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.26.47.07.05.96.76.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.26.47.07.05.96.76.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Banking mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value496512493475472464436422406440368
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.441.639.839.241.343.840.336.036.137.834.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.441.639.839.241.343.840.336.036.137.834.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value794719746738670595644752719724694
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.658.460.260.858.756.259.764.063.962.265.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.658.460.260.858.756.259.764.063.962.265.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value138149133117122124115109102
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.712.110.79.710.711.710.79.39.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.712.110.79.710.711.710.79.39.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics mco:EnterpriseRiskSolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysAnalytics, mco:ProfessionalServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value031434242434037374037
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.53.53.53.74.13.73.23.33.43.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.53.53.53.74.13.73.23.33.43.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics mco:ProfessionalServices0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value358332317315307297282275267258218
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.827.025.626.026.928.026.123.523.722.120.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.827.025.626.026.928.026.123.523.722.120.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics mco:ResearchDataAndAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value453362392387355291307391389
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.129.431.631.931.127.528.433.334.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.129.431.631.931.127.528.433.334.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12511412012511687119120
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.39.710.310.28.311.110.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.39.710.310.28.311.110.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:MISOther100.0100.0

mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10912411910892909910893119109
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.410.19.78.98.18.69.29.28.310.210.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.410.19.78.98.18.69.29.28.310.210.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, mco:RatingRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value783710737733664590640747714720689
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.757.659.560.458.255.759.263.663.561.864.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.757.659.560.458.255.759.263.663.561.864.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:RatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value96108105112100121125128117147128
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.48.88.59.28.811.411.610.910.512.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.48.88.59.28.811.411.610.910.512.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments, us-gaap:SubsegmentsConsolidationItems

mco:MoodysAnalytics, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value22222222
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.20.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysAnalytics, us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value498515496477474467438425
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.641.840.039.341.544.140.636.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.641.840.039.341.544.140.636.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3734343332323130
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.82.82.72.83.02.92.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.82.82.72.83.02.92.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value831754780771702627676782
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.461.263.063.661.559.162.666.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.461.263.063.661.559.162.666.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService

mco:MoodysAnalytics, us-gaap:TransferredAtPointInTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3949302130501914
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.04.02.51.82.64.71.81.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.04.02.51.82.64.71.81.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysAnalytics, us-gaap:TransferredOverTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value457463463453442415416408
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.437.637.337.438.739.238.534.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.437.637.337.438.739.238.534.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysAnalytics us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, us-gaap:TransferredAtPointInTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value519442478477410336390495
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.235.938.639.435.931.836.142.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.235.938.639.435.931.836.142.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0

mco:MoodysInvestorsService, us-gaap:TransferredOverTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value275277268260260258254256
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.322.521.621.522.824.423.521.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.322.521.621.522.824.423.521.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mco:MoodysInvestorsService us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

country:US



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value714634659637612546559625597614588567577533545545480481482545499478449461425417391408406400375343344286274315
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.351.553.252.653.651.651.853.253.052.755.456.859.256.759.558.858.855.657.759.557.754.655.052.855.553.555.454.055.553.254.553.753.250.551.652.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.351.553.252.653.651.651.853.253.052.755.456.859.256.759.558.858.855.657.759.557.754.655.052.855.553.555.454.055.553.254.553.753.250.551.652.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Americas



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value777377655753
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.06.06.25.75.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.06.06.25.75.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas100.0100.0100.0100.0100.0100.0

srt:AsiaPacific



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value136135142132126123
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.511.011.511.611.911.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.511.011.511.611.911.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific100.0100.0100.0100.0100.0100.0

us-gaap:EMEA



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value363389361333329344
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.131.629.129.231.031.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.131.629.129.231.031.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EMEA100.0100.0100.0100.0100.0100.0

us-gaap:NonUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value576598580575530513521549529551474
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.748.546.847.446.448.448.246.847.047.344.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.748.546.847.446.448.448.246.847.047.344.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

country:US, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value211214206201200197174174164174160
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.417.416.616.617.618.616.214.814.614.915.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.417.416.616.617.618.616.214.814.614.915.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value503420453436411349384451433440427
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.034.136.535.936.033.035.638.438.537.840.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.034.136.535.936.033.035.638.438.537.840.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Americas, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value383637342931
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.03.03.02.82.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.03.03.02.82.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0

srt:Americas, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value393739312822
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.03.22.72.72.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.03.22.72.72.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0

srt:AsiaPacific, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value555763535150
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.34.65.14.64.84.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.34.65.14.64.84.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0

srt:AsiaPacific, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value817878797572
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.46.46.97.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.46.46.97.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0

us-gaap:EMEA, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value192204186184187179
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.916.615.016.117.716.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.916.615.016.117.716.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EMEA mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0

us-gaap:EMEA, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value171184174149141165
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.314.914.113.013.315.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.314.914.113.013.315.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EMEA mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value285298287273271267261248242266208
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.124.223.222.523.725.324.221.221.522.919.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.124.223.222.523.725.324.221.221.522.919.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value291299293302258245260301286284266
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.624.323.624.922.723.224.125.625.424.425.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.624.323.624.922.723.224.125.625.424.425.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

country:US, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5358484648454342
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.73.93.84.24.34.03.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.73.93.84.24.34.03.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysAnalytics mco:EnterpriseRiskSolutions100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysAnalytics, mco:ProfessionalServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value010181717181513131313
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.81.51.51.51.71.41.11.21.21.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.81.51.51.51.71.41.11.21.21.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysAnalytics mco:ProfessionalServices0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value158145139137134132116118112113107
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.211.811.311.411.812.510.810.110.09.810.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.211.811.311.411.812.510.810.110.09.810.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysAnalytics mco:ResearchDataAndAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value314223258242243186194255
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.318.220.920.021.317.618.021.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.318.220.920.021.317.618.021.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6048535246315954
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.94.34.34.03.05.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.94.34.34.03.05.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6879726960545961537363
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.55.95.75.35.25.55.24.76.36.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.55.95.75.35.25.55.24.76.36.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService, mco:RatingRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value503419453436411349384451433440427
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.034.036.535.936.033.035.638.438.437.840.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.034.036.535.936.033.035.638.438.437.840.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService mco:RatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value61686771628381807410489
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.75.55.55.95.47.97.56.86.68.98.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.75.55.55.95.47.97.56.86.68.98.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8590857174787266
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.67.46.95.96.57.46.75.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.67.46.95.96.57.46.75.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysAnalytics mco:EnterpriseRiskSolutions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysAnalytics, mco:ProfessionalServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value021242424252524242624
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.01.72.02.02.22.42.32.02.22.22.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.01.72.02.02.22.42.32.02.22.22.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysAnalytics mco:ProfessionalServices0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value200186177177172169165157154144110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.515.214.314.615.116.015.313.413.712.410.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.515.214.314.615.116.015.313.413.712.410.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysAnalytics mco:ResearchDataAndAnalytics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value139138133144112104112135
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.811.210.711.99.89.810.411.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.811.210.711.99.89.810.411.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:CorporateFinance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6566667370565966
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.45.46.06.15.35.55.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.45.46.06.15.35.55.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:FinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:MISOther100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4145473932353947394545
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.23.73.83.22.83.43.74.03.53.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.23.73.83.22.83.43.74.03.53.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:PublicProjectAndInfrastructureFinance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:RatingRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value280290284297253240255296281280262
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.723.622.924.522.222.723.625.325.024.024.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.723.622.924.522.222.723.625.325.024.024.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:RatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3540374038464447434339
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.33.03.33.44.34.14.13.93.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.33.03.33.44.34.14.13.93.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs mco:MoodysInvestorsService mco:StructuredFinanceLineOfBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SubsegmentsConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-39-36-36-35-34-34-34-33-34-34-33
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-3.0-2.9-2.9-3.0-3.2-3.2-2.8-3.1-2.9-3.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-3.0-2.9-2.9-3.0-3.2-3.2-2.8-3.1-2.9-3.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimingOfTransferOfGoodOrService

us-gaap:TransferredAtPointInTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value558492509499440386410509
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.339.941.141.138.536.537.943.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.339.941.141.138.536.537.943.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TransferredOverTime



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value732740731714702673670665
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.760.158.958.961.563.662.156.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.760.158.958.961.563.662.156.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value129012331240121311421060108011751126116510621000975942917928816865834918865877816873767779705756731754688640646567531605605577564513477476485451450408
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 RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Cost Of Revenue

us-gaap:CostOfRevenue



Period End2020-03-312019-03-31
Value340342
Percentage of CostOfRevenue100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.429.9

Operating Expenses

us-gaap:OperatingExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value6987286917306806836146416357026175435311415519518512532485498494532466461434467414405451494418362377335335335327324287279
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.159.155.860.259.664.556.854.656.460.358.154.354.5150.256.755.862.761.558.154.357.160.757.152.956.660.058.753.661.765.560.856.558.463.155.455.456.763.260.158.7

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-39-36-36-34-34-34
Percentage of OperatingExpenses-5.6-5.0-5.3-5.0-5.0-5.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-3.0-2.9-3.0-3.2-3.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.098.099.1100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value394417388378393344
Percentage of OperatingExpenses56.457.356.155.657.556.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.533.931.333.137.131.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysAnalytics79.181.078.379.784.278.6

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value343348339336325303
Percentage of OperatingExpenses49.147.849.149.447.549.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.628.227.429.430.728.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysInvestorsService41.346.143.547.851.844.9

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-03-31
Value698680
Percentage of CostsAndExpenses100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.159.5

Research And Development Expense

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value301318291274281278260270271304247217221253225228232252220227221250206217195223187185227236187159168145142142148152137128
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.325.923.522.624.626.224.123.024.126.123.321.822.826.924.624.628.529.126.424.725.628.525.324.925.428.626.524.531.031.327.224.926.127.323.623.625.729.728.827.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, mco:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAndPriorServiceCostsPortionAttributableToParent



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of SellingGeneralAndAdministrativeExpense-0.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome mco:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAndPriorServiceCostsPortionAttributableToParent0.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value592504548483461376466534490462445457443-473397410304333349419371344349411333311291350280260269278269172196270270250196188190196178172187148
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.940.944.239.840.435.543.245.443.639.741.945.745.5-50.243.344.237.338.541.945.742.939.342.947.143.440.041.346.438.334.539.243.541.630.336.944.644.643.334.836.839.941.336.838.241.536.4

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value104971076395749371687561
Percentage of OperatingIncomeLoss17.619.419.613.220.719.720.113.413.916.313.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.17.98.75.28.47.08.76.16.16.55.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysAnalytics20.919.021.713.320.215.921.416.816.617.016.4

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value488406441419365302372462422390387
Percentage of OperatingIncomeLoss82.480.680.486.879.380.379.986.686.184.387.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.832.935.634.632.028.534.539.437.533.536.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mco:MoodysInvestorsService58.753.956.554.452.148.255.159.156.451.753.6

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value12790202141-2-18-941635719-822016-3213-378-2102018835-3-1
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.60.80.00.20.00.21.30.1-0.2-0.10.8-1.04.40.80.30.70.82.4-0.90.32.32.0-0.40.31.7-0.51.01.2-0.31.50.4-0.00.31.41.40.61.0-0.8-0.2

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

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of OtherNonoperatingIncomeExpense-8.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value-81-64102-2923-301427-10-609-1936-25-4132-901132-37-10-7413
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.3-5.28.3-2.42.1-28.50.42.3-1.0-6.41.0-2.14.4-2.9-5.03.5-10.51.64.8-5.9-1.9-14.02.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-03-31
Value-80-10
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax98.8-42.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.2-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-03-31
Value-17
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax1.229.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.0

us-gaap:Parent



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-804021-86-37-2541207650416
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax98.8-137.089.428.7-924.4-929.6-1102.80.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.23.31.8-8.2-3.5-21.710.76.64.84.10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-28-51-36-50-50-55-54-38-49-5520477-28-31-28-20-6-40-26-8-2173-21-10-28-14-13-23-5-13-10-11-5-5-14-7-12-14
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.2-4.2-2.9-4.1-4.4-5.2-5.0-3.3-4.4-4.71.90.40.80.8-3.1-3.4-3.5-2.4-0.7-4.4-3.1-1.0-2.68.4-2.8-1.3-4.0-1.9-1.8-3.2-0.8-2.2-1.6-2.1-1.0-1.0-2.6-1.5-2.6-3.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value7791130121376810011764379146148105-40112120899110911511394109160899276108767477888352737378445567
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.07.410.510.03.36.59.310.05.732.513.714.810.8-4.212.313.010.910.613.212.513.110.813.518.411.711.810.914.310.49.911.313.912.89.912.112.113.58.611.614.2

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value48736138231237325231237737628319313345-425256258186220233264231241218324221209186228191162186175175132190190157137122114
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.330.825.732.723.828.932.233.42.430.131.335.5-45.228.027.822.925.528.028.826.727.526.837.128.926.926.530.226.121.527.127.427.124.931.531.527.226.725.724.1

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-2-3000-10
Percentage of ProfitLoss-0.4-8.60.10.0-0.7-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-2.50.00.0-0.2-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of ProfitLoss-0.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of ProfitLoss-0.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-113121111111
Percentage of ProfitLoss-0.20.40.80.31.00.61.10.91.00.91.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.10.20.10.20.20.30.30.30.20.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value488359379373250310130189155136121113
Percentage of ProfitLoss100.299.699.299.899.299.498.999.199.099.198.798.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.632.723.628.724.631.226.926.525.323.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value488359379373250310
Percentage of ProfitLoss100.299.699.299.899.299.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.632.723.628.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value373457288319363166272123495111368359353-4872662402221981923031421341283332112522332141311632191302025958199179
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.937.123.226.331.815.725.210.544.09.634.736.036.2-51.829.125.927.322.923.033.016.515.415.838.127.532.433.128.418.021.731.820.331.310.411.033.031.1

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-2-3338-9-8-3803105-8-142222215353222212240022
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.30.20.30.7-0.9-0.8-0.30.8-0.00.31.10.6-0.8-1.60.30.30.30.30.30.10.60.40.60.50.40.40.40.40.30.40.40.60.10.10.30.3

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value371453291323371157264120504111371370358-4952512422242011943051441391323382152552362171341652211322065920220218119612470
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.836.823.526.632.614.824.510.244.89.635.037.036.8-52.627.426.127.523.223.333.316.615.916.238.728.032.833.528.718.422.032.220.731.911.133.433.431.538.326.014.8

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value48835937931037225031037637225317312345-4282552551842172312612302362153192182061832251881601831721739613018918915513713612111310110010990
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 RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.625.632.723.628.732.033.12.229.931.235.4-45.527.827.522.625.227.728.526.626.926.436.528.426.526.129.825.721.226.726.926.817.024.631.231.226.924.326.525.323.821.022.324.322.1

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-1131021133210312222215353222212321111111
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.10.20.10.10.20.20.10.30.30.20.10.00.30.10.30.30.30.30.30.10.60.40.60.50.40.40.40.40.30.40.50.30.30.30.30.30.20.30.3

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11306102659477959195189526843987519014859483046536543553275019504451145123477249994976466949934786435343954154379439113960366229632994287625212744252425402003
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1050194288774901691938869783382918594870984617003616063545377541454665456501351025122462643753990385339673781325833713492327127852833297426952761274728382599
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets92.991.892.694.096.693.192.894.795.3101.3101.9107.2113.3119.3107.1107.3106.9106.5105.0102.1102.999.187.683.488.590.391.085.986.288.289.394.094.6103.4106.9100.6108.8111.7129.8

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11306102659477959195189526843987519014859483046536543553275019504451145123477249994976466949934786435343954154379439113960366229632994287625212744252425402003
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value582612472352123459400242199-327-369-679-927-1225-564-600-581-565-469-331-373-1872504453853372814474573853119982-169-184-26-231-309-606
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.16.05.03.71.34.84.72.82.2-3.8-4.4-10.4-17.1-23.0-11.2-11.9-11.4-11.0-9.8-6.6-7.5-4.05.09.38.97.76.811.811.79.78.53.32.8-5.9-7.3-1.0-9.2-12.2-30.3

us-gaap:StatementEquityComponents

mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value143545433-135
Percentage of StockholdersEquity24.68.843.87.20.3-2.9
Percentage of Assets1.30.50.60.3-0.00.7
Percentage of Assets mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent0.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-92-92-69-53-61-79
Percentage of StockholdersEquity-15.8-15.0-56.0-11.518.66.4
Percentage of Assets-0.8-0.9-0.7-0.6-0.7-1.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-3500012
Percentage of StockholdersEquity-6.00.00.00.0-0.3-0.2
Percentage of Assets-0.30.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-554-439-455-426-172-364
Percentage of StockholdersEquity-95.2-71.7-369.3-92.652.529.7
Percentage of Assets-4.9-4.3-4.8-4.5-2.0-6.8
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-570-401-440-406-113-325
Percentage of StockholdersEquity-97.9-65.5-357.1-88.334.526.5
Percentage of Assets-5.0-3.9-4.6-4.3-1.3-6.1
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value399436793042315428983386251628392818258022784559348532533016303030853243286230643039268630612944294529682782244225202525220515191526142413601543133913431012
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.335.832.132.930.535.629.832.431.330.027.469.864.161.160.160.160.363.360.061.361.157.561.361.567.767.567.064.464.463.860.251.351.049.553.956.253.152.950.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value214118321178119511961685103413141277107196232802129205117461674157617571471153815091219194017771792191918351633175817551518824814760854938719659793485496473245426
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.917.812.412.512.617.712.315.014.212.511.650.239.238.534.833.230.834.330.830.830.326.138.937.141.243.744.243.044.944.341.527.827.226.433.934.228.526.00.00.00.023.70.00.0

us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1176866327327432904202238
Percentage of CashAndCashEquivalentsAtCarryingValue54.947.327.827.436.153.719.522.3
Percentage of Assets10.48.43.53.44.59.52.42.8
Percentage of Assets us-gaap:CertificatesOfDeposit0.00.00.00.00.00.00.00.0

Short Term Investments

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9098951191141321101011001111088613217331135249047447050848545816418217718620917111722151314131161210
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.81.01.01.21.21.41.31.21.11.31.31.32.43.36.27.09.69.39.910.29.89.83.33.84.14.35.00.50.30.50.60.50.40.50.50.40.30.50.5

us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value879588104110115110111
Percentage of ShortTermInvestments96.796.992.187.497.387.4100.0100.0
Percentage of Assets0.80.90.91.11.21.21.31.3
Percentage of Assets us-gaap:CertificatesOfDeposit0.00.00.00.00.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14131419122812451301128711311137120711471007916953887831843852802720801842792712758737694592607637621549530589489400492503497444
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.513.813.013.013.713.513.413.013.413.312.114.017.516.716.616.716.715.715.116.016.917.014.315.816.915.814.216.016.315.715.017.919.717.015.917.919.919.622.2

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value35033028633528628223828623325020027526914012715916617916317516417219717711911498147819168109687749566712751
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.13.23.03.53.03.02.83.32.62.92.44.25.02.62.53.23.33.53.43.53.33.73.93.72.72.62.43.92.12.31.93.72.32.72.02.12.75.02.6

Machinery And Equipment Gross

Noncurrent Assets

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value853839816797834790767748731706681645620595581560541518501489467451414414391375343343328314297286274258244232214200164
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.58.28.68.38.88.39.18.58.18.28.29.911.411.211.611.110.610.110.59.89.49.78.38.79.08.58.39.18.47.98.19.79.29.09.78.58.57.98.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value285292292300318320311312321325332329329325329323310306306304299302303298282278284287296307315317324326323325324319293
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.83.13.13.33.43.73.63.63.84.05.06.16.16.66.46.16.06.46.16.06.56.16.26.56.36.87.67.67.88.610.710.811.412.811.812.912.614.6

Long Term Investments

us-gaap:LongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value491020522184548442227343332615955555845474843440
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.10.20.10.20.20.50.50.50.30.30.50.60.61.21.21.11.11.20.91.01.00.90.90.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value121117113121111104981071009983808626181630282522232120173937353540384044373030
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.21.31.21.11.21.21.11.21.01.21.60.50.40.30.60.60.50.40.50.50.40.40.90.90.90.91.01.01.11.51.31.21.5

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value41223722361036643762378136613662383137533722105410291023104010471050976990100698810211000955656665630619623637646638656642451470463465349338
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.536.338.138.239.539.743.441.942.543.744.816.118.919.220.720.820.519.120.720.119.921.920.020.015.115.115.216.315.916.117.621.521.922.417.917.118.418.317.40.0

us-gaap:BusinessAcquisition

mco:RegulatoryDataCorporation



Period End2020-02-13
Value494
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets mco:RegulatoryDataCorporation0.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value38083407329033523495352333893377353934683434768755746761762766691697722653612625635627645631440458454338
Percentage of Goodwill92.491.591.191.592.993.292.692.292.492.492.372.973.472.973.272.972.970.970.470.798.398.298.298.398.398.398.397.697.497.696.8
Percentage of Assets33.733.234.734.936.737.040.238.639.340.441.411.813.914.015.215.115.013.514.615.514.915.715.817.321.221.522.017.516.717.916.9
Percentage of Assets mco:MoodysAnalytics0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.048.845.150.352.148.949.053.655.449.90.0

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value3143153203122672572722852912852872862742772792842842842922981111111111111111121111
Percentage of Goodwill7.68.58.98.57.16.87.47.87.67.67.727.126.627.126.827.127.129.129.629.31.71.81.81.71.71.71.72.42.62.43.2
Percentage of Assets2.83.13.43.32.82.73.23.33.23.33.54.45.05.25.65.65.65.66.16.40.30.30.30.30.40.40.40.40.40.40.6
Percentage of Assets mco:MoodysInvestorsService0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01.01.31.21.21.31.51.91.41.80.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value17091498145414861530156615171541164116311633287289296307319329299308322328345349310212221198202212226233238249253153166167168104
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.114.615.315.516.116.418.017.618.219.019.74.45.35.66.16.36.45.86.56.56.67.47.06.54.95.04.85.35.45.76.48.08.38.86.16.16.66.65.2

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value2282412362382412512522592792802832830323638422729313336372932
Percentage of IntangibleAssetsNetExcludingGoodwill13.316.116.316.015.816.116.616.817.017.217.49.910.511.111.712.212.89.09.59.910.110.710.89.614.5
Percentage of Assets2.02.32.52.52.52.63.03.03.13.33.40.40.60.60.70.80.80.50.60.60.70.80.80.60.7
Percentage of Assets us-gaap:ComputerSoftwareIntangibleAsset0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value121610901048107811301153111111251196118511811831841851921962011881922002032122151781451501281301371451491511571598794959537
Percentage of IntangibleAssetsNetExcludingGoodwill71.272.872.172.673.973.673.273.072.972.672.364.063.762.762.461.761.263.062.562.161.961.461.657.568.468.165.064.864.764.363.963.563.162.856.956.957.156.836.0
Percentage of Assets10.810.611.111.211.912.113.212.913.313.814.22.83.43.53.83.93.93.74.04.04.14.54.33.73.33.43.13.43.53.74.15.15.25.53.53.53.83.81.9
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1454648483738282628282917171818192020202122232222665678891011161717
Percentage of IntangibleAssetsNetExcludingGoodwill8.53.13.33.32.42.51.91.71.71.81.86.06.06.16.06.16.17.06.86.86.96.86.37.12.92.92.73.13.33.53.84.04.34.510.810.710.6
Percentage of Assets1.30.40.50.50.40.40.30.30.30.30.40.30.30.30.40.40.40.40.40.40.50.50.40.50.10.10.10.20.20.20.20.30.40.40.70.70.7
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value11812011911911912112312713513413654535556585956586060636368181916161718181818199
Percentage of IntangibleAssetsNetExcludingGoodwill6.98.08.28.07.87.78.18.38.28.38.319.018.518.718.318.318.018.818.818.718.518.318.222.28.88.88.58.48.27.97.87.87.67.55.7
Percentage of Assets1.01.21.31.21.31.31.51.51.51.61.60.81.01.01.11.21.21.11.21.21.21.41.31.40.40.40.40.40.40.50.50.60.60.70.4
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeSecrets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21111111222334556678891011111213131415161617171819202016
Percentage of IntangibleAssetsNetExcludingGoodwill0.10.10.10.10.10.10.10.10.10.10.21.11.31.51.61.81.92.22.42.52.72.83.03.65.55.76.76.96.96.86.97.06.97.112.011.611.912.116.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.20.20.20.20.20.20.30.30.30.40.40.40.40.60.60.60.70.70.80.80.8
Percentage of Assets us-gaap:TradeSecrets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value59438942531732127424325925815916817016611215415816216017315516614514214710611293891009610410090826158525550
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.33.84.53.33.42.92.93.02.91.92.02.63.12.13.13.13.23.13.63.13.43.12.83.12.42.62.32.42.62.42.93.43.02.92.42.12.12.22.5

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2351191221381839200520981823184319202063198212371423242814021146115112181050112411381199104110931027114189789710131164982995101111348348528419331236
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.818.622.619.221.122.021.621.121.324.023.918.926.245.627.922.722.523.822.022.522.925.720.922.823.626.021.623.625.929.426.833.633.839.433.131.033.336.861.7

Debt Current

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value2638144193016223221292524282835142217162119172016161014161414181616168147
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.40.20.10.20.30.20.30.40.30.40.40.40.50.60.70.30.40.40.30.40.40.40.40.40.40.20.40.40.40.40.60.60.60.70.30.60.4

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6647736075885376955815935327505774903921444450453391566409422379557420430312538337312355555362300302452311302273414317
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.97.56.46.15.67.36.96.85.98.77.07.57.227.19.09.07.711.18.68.47.611.98.49.07.212.38.18.29.114.09.910.110.115.712.311.010.916.315.8

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value119108859381959176788277816164958873707877666079879571574354464346786049545262
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.10.91.00.91.01.10.90.91.00.91.21.11.21.91.81.41.41.61.61.31.31.61.82.21.61.41.21.41.21.21.62.62.12.02.02.13.1

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value9173567565717985867949534016721411112235016223304732556221812233122620
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.70.60.80.70.70.91.01.00.90.60.80.70.30.20.40.80.20.30.51.00.30.40.70.01.10.10.10.21.40.60.60.40.80.10.41.11.0

Other Liabilities Current

Dividends Payable Current

us-gaap:DividendsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value3765465446544787667866375444653324722238112726
Percentage of DividendsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.10.00.10.10.10.10.10.10.10.11.50.10.10.11.50.10.10.11.60.10.10.11.50.10.10.11.20.10.10.11.30.10.11.11.3

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value6303558152385258522856764929523454175410540648873861336334183393
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.754.455.354.854.959.658.459.860.163.065.174.871.063.168.166.2

us-gaap:LongtermDebtType

mco:A375SeniorNoteDueTwoThousandAndTwentyFive



Period End2020-03-31
Value693
Percentage of LongTermDebt11.0
Percentage of Assets6.1
Percentage of Assets mco:A375SeniorNoteDueTwoThousandAndTwentyFive0.0

mco:A950SeniorNotesDueTwoThousandAndThirty



Period End2020-03-312019-12-31
Value814833
Percentage of LongTermDebt12.914.9
Percentage of Assets7.28.1
Percentage of Assets mco:A950SeniorNotesDueTwoThousandAndThirty0.00.0

mco:TwentyThirteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value498497496496496496496496495495495495495495495494
Percentage of LongTermDebt7.98.99.59.49.58.710.19.59.29.29.210.112.814.714.514.6
Percentage of Assets4.44.85.25.25.25.25.95.75.55.86.07.69.19.39.99.7
Percentage of Assets mco:TwentyThirteenSeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mco:TwoThousandEighteenSeniorNoteDueTwoThousandFourtyEight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value389389389389389389
Percentage of LongTermDebt6.27.07.47.47.46.9
Percentage of Assets3.43.84.14.14.14.1
Percentage of Assets mco:TwoThousandEighteenSeniorNoteDueTwoThousandFourtyEight0.00.00.00.00.00.0

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyNine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value394394394394393393
Percentage of LongTermDebt6.37.17.57.57.56.9
Percentage of Assets3.53.84.24.14.14.1
Percentage of Assets mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyNine0.00.00.00.00.00.0

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value299299298298298298298297
Percentage of LongTermDebt4.75.45.75.75.75.36.05.7
Percentage of Assets2.62.93.23.13.13.13.53.4
Percentage of Assets mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyOne0.00.00.00.00.00.00.00.0

mco:TwoThousandFifteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value546558542566558568577580611596587566531523558543
Percentage of LongTermDebt8.710.010.410.810.710.011.711.111.311.010.911.613.815.616.316.0
Percentage of Assets4.85.45.75.95.96.06.86.66.86.97.18.79.89.811.110.6
Percentage of Assets mco:TwoThousandFifteenSeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mco:TwoThousandFourteenSeniorNotesThirtyYear



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value598599597597597597597597597597597597597597597600
Percentage of LongTermDebt9.510.711.411.411.410.512.111.411.011.011.112.215.517.817.517.7
Percentage of Assets5.35.86.36.26.36.37.16.86.67.07.29.111.011.211.911.7
Percentage of Assets mco:TwoThousandFourteenSeniorNotesThirtyYear0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyEight



Period 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
Value524493492492491491491491491490490490
Percentage of LongTermDebt8.38.89.49.49.48.710.09.49.19.19.110.0
Percentage of Assets4.64.85.25.15.25.25.85.65.45.75.97.5
Percentage of Assets mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyEight0.00.00.00.00.00.00.00.00.00.00.00.0

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree



Period 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
Value512504505503499496496495495495495495
Percentage of LongTermDebt8.19.09.69.69.58.710.19.59.19.29.210.1
Percentage of Assets4.54.95.35.35.25.25.95.75.55.86.07.6
Percentage of Assets mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree0.00.00.00.00.00.00.00.00.00.00.00.0

mco:TwoThousandSeventeenSeniorNotesDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value520508511510503500493496495
Percentage of LongTermDebt8.39.19.89.79.68.810.09.59.2
Percentage of Assets4.64.95.45.35.35.35.95.75.8
Percentage of Assets mco:TwoThousandSeventeenSeniorNotesDueTwoThousandTwentyOne0.00.00.00.00.00.00.00.00.0

mco:TwoThousandTwelveSeniorNotesDueTwoThousandTwentyTwo



Period End2020-03-312019-12-31
Value516507
Percentage of LongTermDebt8.29.1
Percentage of Assets4.64.9
Percentage of Assets mco:TwoThousandTwelveSeniorNotesDueTwoThousandTwentyTwo0.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value63035581473652585228522644844934511851115107488738613063311834203428340131243106309525472536210420972101209816051610160716111110113711721200122812211228746
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.754.450.054.854.954.953.156.456.859.561.574.871.057.562.167.867.066.465.562.162.254.650.844.048.247.850.542.341.240.644.037.538.040.847.644.748.448.437.2

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value196299264265256249252260256244268259272264256248270228230245251244166161170164212206219213194189192187129132132112
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.72.92.82.82.72.63.03.02.82.83.24.05.05.05.14.95.34.54.84.95.05.23.33.43.93.75.15.55.65.45.36.46.46.55.24.85.25.6

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value21721922422120119620621722021221221220219720623023023222922722723022922881010971110981099811108710
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.12.42.32.12.12.42.52.42.52.63.23.73.74.14.64.54.54.84.64.64.94.64.80.20.20.30.20.20.30.30.30.30.40.40.30.30.40.00.00.00.5

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value403504492491486576574625554664447426434425412404422417417441444430348354355360426412421410386395405404357363362362317
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.64.95.25.15.16.16.87.26.17.75.46.58.08.08.28.08.38.18.78.88.99.27.07.48.28.210.310.910.810.410.513.313.614.114.213.214.314.315.9

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value582612472352123459400242199-327-369-679-927-1225-564-600-581-565-469-331-373-1872504453853372814474573853119982-169-184-26-231-309-606
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.16.05.03.71.34.84.72.82.2-3.8-4.4-10.4-17.1-23.0-11.2-11.9-11.4-11.0-9.8-6.6-7.5-4.05.09.38.97.76.811.811.79.78.53.32.8-5.9-7.3-1.0-9.2-12.2-30.3

us-gaap:StatementEquityComponents

mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value143545433-135
Percentage of StockholdersEquity24.68.843.87.20.3-2.9
Percentage of Assets1.30.50.60.3-0.00.7
Percentage of Assets mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent0.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-92-92-69-53-61-79
Percentage of StockholdersEquity-15.8-15.0-56.0-11.518.66.4
Percentage of Assets-0.8-0.9-0.7-0.6-0.7-1.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-3500012
Percentage of StockholdersEquity-6.00.00.00.0-0.3-0.2
Percentage of Assets-0.30.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-554-439-455-426-172-364
Percentage of StockholdersEquity-95.2-71.7-369.3-92.652.529.7
Percentage of Assets-4.9-4.3-4.8-4.5-2.0-6.8
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value-570-401-440-406-113-325
Percentage of StockholdersEquity-97.9-65.5-357.1-88.334.526.5
Percentage of Assets-5.0-3.9-4.6-4.3-1.3-6.1
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3333333333
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1004196569391910788938594842982047913746575137269703166887261707768956709663164686276604459365780552153025210508249024713463444864350417641474048389237363329
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets88.894.199.195.093.490.299.993.787.886.990.5111.2129.3125.6144.7140.3134.8130.9138.9129.4126.1129.5118.9120.8126.8120.6125.4133.9125.3119.0126.5151.4145.3145.2164.5147.5154.2147.1166.2

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value95249250899388868754831282608198817181528123810880518029797378217610738972096918-67016384-5957-5676544953195209484646524614461546374549463546514448448544074288
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets84.290.194.992.792.087.397.993.790.794.997.8124.1148.1150.7158.9155.0148.8144.2151.1138.4-134.7136.7-119.3-118.6125.2121.0125.4127.7119.0116.5126.0156.5151.9161.2184.5162.1177.7173.5214.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-06-262014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-554-439-537-446-455-426-342-304-51-172-257-309-357-364-305-316-301-339-320-280-322-235-133-47-47-61-54-100-149-138-82-85-120-78-107-701-9-33-41
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.9-4.3-5.7-4.7-4.8-4.5-4.1-3.5-0.6-2.0-3.1-4.7-6.6-6.8-6.1-6.3-5.9-6.6-6.7-5.6-6.5-5.0-2.7-1.00.0-1.4-1.2-2.4-4.0-3.5-2.1-2.3-4.1-2.6-3.7-2.80.1-0.4-1.3-2.1

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CurrencySwap, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value22222
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.4-0.5-0.5-0.6-0.6
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:CurrencySwap us-gaap:CashFlowHedging0.00.00.00.00.0

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1074187712
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-19.3-9.3-16.3-1.7-2.9
Percentage of Assets0.90.40.90.10.1
Percentage of Assets us-gaap:CurrencySwap us-gaap:NetInvestmentHedging0.00.00.00.00.0

us-gaap:ForeignExchangeForward, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2626272323
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-4.7-5.9-5.1-5.3-5.5
Percentage of Assets0.20.30.30.20.2
Percentage of Assets us-gaap:ForeignExchangeForward us-gaap:NetInvestmentHedging0.00.00.00.00.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-37-2-2-2-2
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax6.70.50.40.50.6
Percentage of Assets-0.3-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:InterestRateContract us-gaap:CashFlowHedging0.00.00.00.00.0

us-gaap:LongTermDebt, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value10-1311-6-3
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-1.83.0-2.11.50.7
Percentage of Assets0.1-0.10.1-0.1-0.0
Percentage of Assets us-gaap:LongTermDebt us-gaap:NetInvestmentHedging0.00.00.00.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value-35000002220101-1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax6.3-0.0-0.0-0.0-0.0-0.0-0.6-0.7-4.4-0.5-0.4-0.2-0.50.3
Percentage of Assets-0.30.00.00.00.00.00.00.00.00.00.00.00.0-0.0
Percentage of Assets us-gaap:CashFlowHedging0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value1435412624533215-12-1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-25.8-12.3-23.5-5.5-11.8-7.7-5.023.50.8
Percentage of Assets1.30.51.30.30.60.30.2-0.1-0.0
Percentage of Assets us-gaap:NetInvestmentHedging0.00.00.00.00.00.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value108541262432
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-19.5-12.3-23.6-5.5-7.7
Percentage of Assets1.00.51.30.30.3
Percentage of Assets us-gaap:DesignatedAsHedgingInstrument0.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value345479441387367376307385391404390464-51236932729123726029933226130825128017727328416620232726062200164
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.738.935.631.932.135.528.432.834.734.736.746.4-52.539.235.731.429.130.035.836.230.235.230.932.123.135.140.322.027.743.437.89.634.834.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-772185-96-45-7-292-68-26-18-12-344721181044101-108-1010-42-49-320-131-31-82-39-203-16-2-4-20-13-13-13
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-59.815.0-7.8-3.8-0.6-27.6-6.3-2.3-1.6-1.1-324.32.11.911.10.510.9-13.3-1.21.2-4.6-5.7-36.5-16.1-3.6-10.7-5.0-28.9-2.1-0.4-0.5-2.9-2.1-2.3-2.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value765-46-331-337-848568-512-285-182-289719623553-127-259-283-33951-354-281123-671107-279-222-15583-270-156-91436-7-145-111
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax59.3-3.7-26.7-27.8-74.353.6-47.4-24.3-16.2-24.867.762.456.8-13.5-28.3-30.5-41.65.9-42.5-30.714.3-76.513.2-32.0-28.9-20.011.8-35.7-21.3-12.263.5-1.1-25.1-23.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value345479441387367376307385391404390464-51236932729123726029933226130825128017727328416620232726062200164
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.738.935.631.932.135.528.432.834.734.736.746.4-52.539.235.731.429.130.035.836.230.235.230.932.123.135.140.322.027.743.437.89.634.834.4

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value48835937931037225031037637225317312345-4282552551842172312612302362153192182061832251881601831721739613018918915513713612111310110010990
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 RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.625.632.723.628.732.033.12.229.931.235.4-45.527.827.522.625.227.728.526.626.926.436.528.426.526.129.825.721.226.726.926.817.024.631.231.226.924.326.525.323.821.022.324.322.1

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value48736138231237325231237737628319313345-425256258186220233264231241218324221209186228191162186175175132190190157137122114
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.330.825.732.723.828.932.233.42.430.131.335.5-45.228.027.822.925.528.028.826.727.526.837.128.926.926.530.226.121.527.127.427.124.931.531.527.226.725.724.1

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-2-3000-10
Percentage of ProfitLoss-0.4-8.60.10.0-0.7-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-2.50.00.0-0.2-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of ProfitLoss-0.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value-1000000.00.0
Percentage of ProfitLoss-0.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-113121111111
Percentage of ProfitLoss-0.20.40.80.31.00.61.10.91.00.91.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.10.20.10.20.20.30.30.30.20.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value488359379373250310130189155136121113
Percentage of ProfitLoss100.299.699.299.899.299.498.999.199.099.198.798.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.632.723.628.724.631.226.926.525.323.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value488359379373250310
Percentage of ProfitLoss100.299.699.299.899.299.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.829.130.632.723.628.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.0

Depreciation Depletion And Amortization

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-772185-96-45-7-292-68-26-18-12-344721181044101-108-1010-42-49-320-131-31-82-39-203-16-2-4-20-13-13-13
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-59.815.0-7.8-3.8-0.6-27.6-6.3-2.3-1.6-1.1-324.32.11.911.10.510.9-13.3-1.21.2-4.6-5.7-36.5-16.1-3.6-10.7-5.0-28.9-2.1-0.4-0.5-2.9-2.1-2.3-2.9

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value2182218202725221521262418303028262325211917181919111298913151916
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value78274031385050
Percentage of PaymentsToAcquireInvestments100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value765-46-331-337-848568-512-285-182-289719623553-127-259-283-33951-354-281123-671107-279-222-15583-270-156-91436-7-145-111
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax59.3-3.7-26.7-27.8-74.353.6-47.4-24.3-16.2-24.867.762.456.8-13.5-28.3-30.5-41.65.9-42.5-30.714.3-76.513.2-32.0-28.9-20.011.8-35.7-21.3-12.263.5-1.1-25.1-23.5

Payments Of Dividends

Payments Of Dividends

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value2532631121674485566374336297955591932232621923042343654403202582011640-397-259-917125100012729
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree



Period 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
Value0.026250.026250.026250.026250.026250.026250.026250.02650.02650.02650.02650.0265
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree0.00.00.00.00.00.00.00.00.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.137-0.00300000000000000270.2540.280.0920.00.2440.2370.1460.146000000000000020.3140.3210.2340.1910.3050.3190.323-0.00500000000000000440.320.3040.329-0.0090000000000000080.3350.3310.289-0.00300000000000000270.3220.3220.3170.00.2950.3360.3210.2850.2780.2780.3320.2440.3110.372
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value100000.00.00.00.0100000.00.00.00.0100000.00.00.00.0200000.00.00.00.0200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:RestrictedStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value000000000100100000000001
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod500.00.00.0800.00.00.0700.00.00.0500.00.00.0600.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value37323334353030343534312828252323252022212220192020171616171816141512141416131214
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value437456464476508
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value21411832117811971685103410712052
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0

mco:AcceleratedShareRepurchaseProgramRemainingNotYetSettled



Period End2020-03-312019-03-31
Value0125
Percentage of AcceleratedShareRepurchaseProgramRemainingNotYetSettled0.0100.0

mco:AdjustedOperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-31
Value649559613599518477514584540518498497475423438441334361378447399371372434356335314373304296293292
Percentage of AdjustedOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value14613214513413312712510510111295
Percentage of AdjustedOperatingIncome22.523.723.722.525.726.724.418.018.821.819.2

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value503426468464385350388479439408405
Percentage of AdjustedOperatingIncome77.576.376.377.574.373.375.682.081.278.781.4

mco:CashPaidResultingInReductionOfNoncontrollingInterestOwnership



Period End2020-03-312019-03-31
Value012
Percentage of CashPaidResultingInReductionOfNoncontrollingInterestOwnership0.0100.0

mco:EffectOfExchangeRateOnDeferredRevenue



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-2922-175-90
Percentage of EffectOfExchangeRateOnDeferredRevenue100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-2418-135-6-1
Percentage of EffectOfExchangeRateOnDeferredRevenue82.883.479.0100.062.6650.0

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-53-30-31
Percentage of EffectOfExchangeRateOnDeferredRevenue17.216.621.00.037.4-550.0

us-gaap:AwardType

mco:EmployeeServiceShareBasedCompensationTaxBenefitFromVestingOfOtherThanStockOptions

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value170001200
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromVestingOfOtherThanStockOptions100.0100.00.0100.0100.0100.0100.0

us-gaap:RestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value44001330003300033
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromVestingOfOtherThanStockOptions258.840.00.0-380.0280.0100.0400.00.00.00.00.00.00.0

mco:IncreaseDecreaseinContractwithCustomerLiabilityExcludingEffectofExchangeRate



Period End2020-03-312019-12-312019-03-312018-12-31
Value64172104174
Percentage of IncreaseDecreaseinContractwithCustomerLiabilityExcludingEffectofExchangeRate100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:NumberOfLinesOfBusinesses

mco:MoodysAnalytics



Period End2020-03-31
Value2.0
Percentage of NumberOfLinesOfBusinesses100.0

mco:MoodysInvestorsService



Period End2020-03-31
Value5.0
Percentage of NumberOfLinesOfBusinesses250.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

mco:OtherComprehensiveIncomeLossAmountOfGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value66-4679-1915614
Percentage of OtherComprehensiveIncomeLossAmountOfGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebt, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23-2418-987223
Percentage of OtherComprehensiveIncomeLossAmountOfGainLossOnDerivativesArisingDuringPeriodNetOfTax34.852.122.948.253.3117.7122.2585.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value89-71102-292313427
Percentage of OtherComprehensiveIncomeLossAmountOfGainLossOnDerivativesArisingDuringPeriodNetOfTax134.8154.0129.0148.2153.3217.7222.2685.0

mco:OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value53-7110223124
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0

mco:OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-110000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeandNetInvestmentHedgeGainLossReclassificationAfterTax100.0100.0100.00.0100.0100.0

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationAndTax



Period End2020-03-312019-03-31
Value-175-27
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationAndTax100.0100.0

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationNetOfTax



Period End2020-03-312019-03-31
Value-170-27
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationNetOfTax100.0100.0

mco:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-5-32340-71
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeReclassificationTax100.0100.0100.00.0100.0100.0

mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationNetOfTax



Period End2020-03-312019-03-31
Value8923
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationNetOfTax100.0100.0

mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationTax



Period End2020-03-312019-03-31
Value307
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationTax100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

mco:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationNetofTax

us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value010000
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationNetofTax0.0100.0100.00.00.00.0

mco:OtherNonOperatingIncomeExpenseOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-130021013-3200-3-100000000000000000000
Percentage of OtherNonOperatingIncomeExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:PensionExpenseNetPeriodicPensionCostsOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3444422222121
Percentage of PensionExpenseNetPeriodicPensionCostsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:PercentageOfRevenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.00.01.01.01.00.01.01.01.00.01.01.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProductOrService

mco:RelationshipRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.560.00.550.550.580.0200000000000000180.570.520.540.0100000000000000090.5
Percentage of PercentageOfRevenues56.00.055.055.058.00.057.052.054.00.050.0

mco:TransactionRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.440.00.450.450.42-0.0200000000000000180.430.480.46-0.0100000000000000090.5
Percentage of PercentageOfRevenues44.00.045.045.042.00.043.048.046.00.050.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

mco:RelationshipRevenue, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.90.00.840.850.850.00.840.84
Percentage of PercentageOfRevenues90.00.084.085.085.00.084.084.0

mco:RelationshipRevenue, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.350.00.360.350.390.0200000000000000180.390.34
Percentage of PercentageOfRevenues35.00.036.035.039.00.039.034.0

mco:TransactionRevenue, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.10.00.160.150.150.00.160.16
Percentage of PercentageOfRevenues10.00.016.015.015.00.016.016.0

mco:TransactionRevenue, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.650.00.640.650.61-0.0200000000000000180.610.66
Percentage of PercentageOfRevenues65.00.064.065.061.00.061.066.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mco:RelationshipRevenue, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-03-31
Value0.770.8
Percentage of PercentageOfRevenues77.080.0

mco:RelationshipRevenue, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-03-31
Value0.950.98
Percentage of PercentageOfRevenues95.098.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.250.00.280.290.30.0200000000000000180.350.27
Percentage of PercentageOfRevenues25.00.028.029.030.00.035.027.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.520.0100000000000000090.540.510.590.0399999999999999250.530.53
Percentage of PercentageOfRevenues52.00.054.051.059.00.053.053.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value0.820.8
Percentage of PercentageOfRevenues82.080.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.370.00.310.340.410.0100000000000000090.380.36
Percentage of PercentageOfRevenues37.00.031.034.041.00.038.036.0

mco:RelationshipRevenue, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.480.00.450.390.440.0100000000000000090.360.34
Percentage of PercentageOfRevenues48.00.045.039.044.00.036.034.0

mco:TransactionRevenue, mco:MoodysAnalytics, mco:EnterpriseRiskSolutions



Period End2020-03-312019-03-31
Value0.230.2
Percentage of PercentageOfRevenues23.020.0

mco:TransactionRevenue, mco:MoodysAnalytics, mco:ResearchDataAndAnalytics



Period End2020-03-312019-03-31
Value0.050.02
Percentage of PercentageOfRevenues5.02.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.750.00.720.710.7-0.0200000000000000180.650.73
Percentage of PercentageOfRevenues75.00.072.071.070.00.065.073.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.48-0.0100000000000000090.460.490.41-0.0400000000000000360.470.47
Percentage of PercentageOfRevenues48.00.046.049.041.00.047.047.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:MISOther



Period End2020-03-312019-03-31
Value0.180.2
Percentage of PercentageOfRevenues18.020.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.630.00.690.660.59-0.0100000000000000090.620.64
Percentage of PercentageOfRevenues63.00.069.066.059.00.062.064.0

mco:TransactionRevenue, mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.520.00.550.610.56-0.0100000000000000090.640.66
Percentage of PercentageOfRevenues52.00.055.061.056.00.064.066.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.00.01.01.01.00.01.01.01.00.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.00.01.01.01.00.01.01.01.00.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mco:MoodysInvestorsService, mco:CorporateFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.00.01.01.01.00.01.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0

mco:MoodysInvestorsService, mco:FinancialInstitutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.00.01.01.01.00.01.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0

mco:MoodysInvestorsService, mco:PublicProjectAndInfrastructureFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.00.01.01.01.00.01.01.01.00.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

mco:MoodysInvestorsService, mco:StructuredFinanceLineOfBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.00.01.01.01.00.01.01.01.00.01.0
Percentage of PercentageOfRevenues100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

mco:UnrecognizedTaxBenefitsAndOtherNonCurrentTaxLiabilitiesPeriodIncreaseDecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-1825-16-211576-15-174410704
Percentage of UnrecognizedTaxBenefitsAndOtherNonCurrentTaxLiabilitiesPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value373233343530303435
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value373233343530303435
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value373233343530303435
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value282524262626242525251888888777887667776778775444434
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0000000001011001001244677109913161616
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts



Period 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
Value0002141205106
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000214120510
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-03-312018-12-31
Value309654-488649
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0

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

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

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



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value58-72191116-3-23
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

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



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value-587-2-19-11-1632-3
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-172014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-30
Value0.560.50.50.50.50.440.440.440.440.380.380.380.00.750.370.370.710.340.340.00.340.620.280.280.00.530.250.20.160.360.160.160.140.30.140.140.140.00.1050.105
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination



Period End2020-03-31
Value20
Percentage of ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-31
Value20
Percentage of ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination100.0

mco:MoodysInvestorsService



Period End2020-03-31
Value0.0
Percentage of ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination0.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value504202372502177353
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value343212290347178251
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress68.1104.778.069.1100.971.3

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value161-982155-1101
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress31.9-4.722.030.9-0.928.7

us-gaap:ContractWithCustomerLiabilityRevenueRecognized



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value435444544003444
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value33626343307-18317
Percentage of ContractWithCustomerLiabilityRevenueRecognized77.259.475.676.8-560.671.3

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value99181109321127
Percentage of ContractWithCustomerLiabilityRevenueRecognized22.840.624.423.2660.628.7

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value57-15-19-1613-23-63-7-4-73-328185-160-6211-1937-13-21827-14-23-2136-170487
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-03-312018-09-302017-12-312017-09-30
Value0.00.00.00.00.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.00.00.00.00.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-20-10-1-1-1-1-2-2-2-2
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.00.00.00.00.00.00.00.00.02100.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0-100000.00.0-100000.0-100000.0-100000.00.0-100000.0-100000.0-100000.00.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0-100000.0-100000.0-100000.0-100000.00.0-100000.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0100.00.0100.0100.0-0.00.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value555533334444
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5555544445545
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0300000.0300000.0300000.0300000.0300000.0200000.0300000.0300000.0200000.0300000.0300000.0
Percentage of DefinedBenefitPlanInterestCost0.05.45.45.46.26.14.16.45.64.06.46.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value455544444444
Percentage of DefinedBenefitPlanInterestCost80.091.192.991.191.789.889.893.685.294.095.794.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1000000.0900000.01000000.0900000.01000000.0900000.01000000.0900000.0800000.0900000.0900000.0800000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value655566667767
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost600.0566.7500.0577.8670.0744.4660.0766.7912.5811.1744.4987.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1000000.0700000.0700000.0700000.0800000.0700000.0800000.0700000.0600000.0700000.0600000.0600000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value544444444444
Percentage of DefinedBenefitPlanServiceCost500.0600.0571.4614.3587.5657.1575.0685.7766.7657.1716.7816.7

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value49504851504846484949433232323231292828272827232223232323232324222319212117181515
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3332303333323031323124
Percentage of DepreciationAndAmortization67.364.163.064.766.267.765.765.565.863.356.7

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1618181817151516161818
Percentage of DepreciationAndAmortization32.735.937.035.333.832.334.334.534.236.743.3

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

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:InterestRateSwap, mco:FairValueHedgeNetInterestSettlementsAndAccruals, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value32100-100
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:Dividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10196959693339888485
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1019495969385858483
Percentage of Dividends100.098.099.799.499.825.097.1100.098.4

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1019495969385858483
Percentage of Dividends100.098.099.799.499.825.097.1100.098.4

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-03-312018-12-31
Value-29231-2
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value7767751177-151099877867678666655665555555545
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1124118125154
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:MutualFund



Period End2020-03-31
Value-7
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value13-30-9-6-7-36-5-4-63-94140439-120187-71-6-5570-40-100
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation

us-gaap:GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-40-26-91-11-44
Percentage of GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfBusiness



Period End2020-03-312019-03-31
Value-90
Percentage of GainLossOnSaleOfBusiness100.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-03-31
Value-90
Percentage of GainLossOnSaleOfBusiness100.00.0

us-gaap:GoodwillAcquiredDuringPeriod



Period End2020-03-31
Value497
Percentage of GoodwillAcquiredDuringPeriod100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-31
Value497
Percentage of GoodwillAcquiredDuringPeriod100.0

mco:MoodysInvestorsService



Period End2020-03-31
Value0.0
Percentage of GoodwillAcquiredDuringPeriod0.0

us-gaap:GoodwillTranslationAndPurchaseAccountingAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-03-312012-12-312012-09-302012-03-312011-03-31
Value-9794-11126-18-67-29-164784831242-14-6-615-14-1331011-2
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-03-312012-12-312012-09-302012-03-31
Value-96100-11024-28-53-16-158715030135-15-1-515-6-1221011
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments99.0106.598.992.7150.078.955.696.191.8104.895.252.6216.7106.419.496.799.448.697.090.098.298.2

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-03-312012-12-312012-03-31
Value-1-6-119-146-2111-20-500-7000
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments1.0-6.51.17.3-50.021.18.2-4.84.847.4-116.7-6.480.63.30.651.43.010.01.8

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value564452512433411321412495441407465462451-465369378275312343379344335328485311301263336267236264264258184264264235181177182
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-03-31
Value-2-1
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-0.4-0.2

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-32351434152414231333112311231
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value291551041613610599193441711106023112911292297108159313411714076683515377213612011451
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-186176-383-17942-1361-22418250104-9889631529-9987037-727510-15813113529-28-13915067-105-108-44
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value7169-5-388158-4-4729138-6-456169-904586-72-506286-3334293-24-27257116962-13
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value60192-100-112103174-91-11216792
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value3213-6745207-66
Percentage of IncreaseDecreaseInContractWithCustomerLiability5.0111.067.543.3118.872.9

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value57-21-3262-27-24
Percentage of IncreaseDecreaseInContractWithCustomerLiability95.0-11.032.559.7-15.627.1

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-243-315139-60140-2-12333-12-163-1013-38-51-65-12-2-54-1612
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-99-242321217-4910523716-2101017-4111-111120-13-194312-52013411-109
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value3879-5052545-4658-4754-74-3712814-31-5-1333-86-2-22751514-4968-1223-41-50-63-6
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInRestructuringReserve



Period End2020-03-312019-03-312018-03-312014-03-312013-03-312012-12-31
Value-12-20000
Percentage of IncreaseDecreaseInRestructuringReserve100.0100.0100.00.00.00.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value202120223032302220333
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndOtherIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value433543
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value31503741465046495150484644363535343129302827382526262320212119161616161616141010
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNonoperatingNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-40-59-45-50-52-55-56-53-50-52-48-45-42-34-35-34-34-28-25-31-29-29-37-26
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-03-31
Value4973
Percentage of InterestPaidNet100.0100.0

us-gaap:LeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value28292829
Percentage of LeaseCost100.0100.0100.0100.0

us-gaap:NumberOfReportableSegments



Period End2020-03-31
Value2.0
Percentage of NumberOfReportableSegments100.0

us-gaap:OperatingLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value24242425
Percentage of OperatingLeaseCost100.0100.0100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-09-302019-06-302019-03-31
Value26262726
Percentage of OperatingLeasePayments100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-06-302011-06-302010-06-30
Value-1-220-20301704-30340627-1-1035-1-1-90-5-3-34
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1-220-20301
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.00.0100.0100.0100.00.0100.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302011-06-302010-06-30
Value-1-220-20301-34
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-06-302011-06-302011-03-312010-06-30
Value0-7000100503-102204100-2124-170312202
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax0.0100.00.0100.00.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value200002111221222223333
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value100001001111111111222
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value100001001
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value100001001
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value100000000000000011111
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-03-312018-03-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-117-101215449-2810-1837-21-4139-89-103-87
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent



Period End2020-03-312019-09-302019-03-312018-09-30
Value89102244
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-76.10.0-240.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-09-302019-03-312018-09-30
Value-1000000.00.01000000.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.90.0-10.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-03-312018-09-30
Value-36000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax30.80.0-0.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-09-302019-03-312018-09-30
Value-169-193-34-42
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax144.40.0340.00.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-10261-5725-95-45-24712485464415-48-5-3951-6-3941-73-131-7710-67049-9-54-236-4632
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax



Period End2020-03-312019-06-302018-06-30
Value-3500
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-31
Value-35
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0

us-gaap:Parent



Period End2020-03-31
Value-35
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-12-312019-03-312018-12-312018-09-30
Value-3600-20
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.00.0100.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestRateContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-36000-20
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.00.00.080.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-36000-10
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.00.00.060.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax



Period End2020-03-312019-12-312019-03-312018-12-31
Value-4800-2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.00.00.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax



Period End2020-03-312019-12-312019-03-312018-12-31
Value-12000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.00.00.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1000000.0100000.00.0100000.00.0-300000.0100000.0-100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.00.0100.00.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestRateContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1000000.0100000.0-100000.00.00.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.00.00.0-0.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1000000.0100000.00.00.0-300000.0100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.00.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1000000.0200000.0-100000.0100000.00.0-300000.0100000.0-100000.0-100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value0.0100000.0-100000.00.00.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax0.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value161415844
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value161415844
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value161415844
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2541-33-76019-3
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value119-95136-373013536-14
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-11692-9111-1-95-47-25712783525713-70-4-1538-19-3941-87-101-8614-64549-11-56335-4330
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-03-31
Value-115-29
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0

us-gaap:StatementEquityComponents

mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent



Period End2020-03-312019-03-31
Value8921
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-77.4-72.4

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-03-31
Value0-16
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-0.055.2

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value-350
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent30.4-0.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-03-31
Value-169-34
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent147.0117.2

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-1-300-214011307-5057010312-1-2120-3-2
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value14-3134-87029-22-5-122220-24131300-14-29830-240-1-566-13
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts



Period End2020-03-312019-03-312018-12-312018-03-312017-12-312017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value608004030140600040003
Percentage of PaymentsOfDebtIssuanceCosts100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-03-31
Value10594
Percentage of PaymentsOfDividendsCommonStock100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value7111245000194200047000420005800
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302013-12-312013-09-302012-12-312012-09-302011-12-312011-09-30
Value69641025403506051307530500001873
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.00.0100.00.00.00.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommercialPaper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value78993645394025547513921939973350653
Percentage of ProceedsFromIssuanceOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromNotesPayable



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302017-12-312017-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value70082407900050030000552074700994992
Percentage of ProceedsFromNotesPayable100.0100.00.0100.00.00.0100.0100.00.00.0100.00.0100.00.00.0100.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2335464150394138415422847626014316812620422610511643
Percentage of ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value13751111245264833144232563835573136639
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockPlans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value168714144682861017225351224171778-231443346232-35-59-14437271112
Percentage of ProceedsFromStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-20020007-2-2023030111211
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mco:AccumulatedNetInvestmentHedgesGainLossAttributabletoParent



Period End2020-03-312019-09-302019-03-312018-09-30
Value0.0800000.00.00.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-09-302019-03-312018-09-30
Value-1000000.0-600000.00.0-800000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax50.00.00.0-114.3

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-03-312018-09-30
Value-1000000.00.00.0100000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax50.00.00.014.3

us-gaap:RepaymentsOfCommercialPaper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3051049573085580139139259584419263440
Percentage of RepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfNotesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-31
Value05000045050300000300001270-31-313131331
Percentage of RepaymentsOfNotesPayable0.0100.00.00.0100.0100.0100.00.00.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302016-12-312016-09-302011-09-302011-06-302010-09-302010-06-302010-03-312009-03-31
Value-11-1535480080033011
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value000272160
Percentage of RestructuringCharges-0.0-11.890.050.750.933.90.0

us-gaap:OperatingSegments, mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-110262320
Percentage of RestructuringCharges100.0111.810.049.349.166.10.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-09-302019-06-302019-03-31
Value91269
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value273.851.64000000000001480.090000000000003410.12999999999999545167.82-0.32999999999998410.00.0162.420.00.4800000000000040.0108.880.00.15999999999999660.0499999999999971676.45
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.00.00.0100.00.0100.00.0100.00.0100.0100.0100.0

us-gaap:RestrictedStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value280.420.0400000000000204640.08999999999997499173.580.0-0.020000000000010232167.50.070000000000007390.0113.320.0200000000000102320.0499999999999971680.830.030000000000001137
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue102.444.469.2103.40.00.0103.114.60.0104.112.5100.0105.70.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value300000.00.00.00.0300000.00.00.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.00.00.00.0100.00.00.0

us-gaap:RestrictedStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0000000000001001-2001-200100
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod266.70.00.0266.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value700004800
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue100.0100.00.0100.0100.00.00.0

us-gaap:RestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1913231460121461111060218900110800091000530013600
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue272.9-660.00.0-660.0305.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value46141647354102261122332143826422322442114323
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000010001
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value0000000000010111
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-847613-59357-32
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6310-5-6600-2-57
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation75.018.40.0-37.8111.218.97.4-29.5177.1

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-847613-59357-32
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2166186351024
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation25.081.6100.0137.8-11.281.192.6129.5-77.1

us-gaap:SubleaseIncome



Period End2020-03-312019-03-31
Value1000000.00.0
Percentage of SubleaseIncome100.00.0

us-gaap:AcceleratedShareRepurchasesDate, us-gaap:ShareRepurchaseProgram

us-gaap:TreasuryStockSharesAcquired

mco:AcceleratedShareRepurchaseFinalSettlementDate, mco:AcceleratedShareRepurchases



Period End2020-03-312019-12-312019-09-302019-04-26
Value2020
Percentage of TreasuryStockSharesAcquired100.00.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value110020000
Percentage of TreasuryStockSharesAcquired39.30.031.80.00.00.00.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2532631124144855663743
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2532631124144855663743
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25326211215144855663743
Percentage of TreasuryStockValueAcquiredCostMethod100.099.9100.0362.8100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value87775492-153320212-103321201222111-50333013
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-28852073921011227042-95-12-197121205-131023101212-83128
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxAuthority

mco:NetOfFederalTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-29842073
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease103.6100.096.0100.099.9

us-gaap:VariableLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value5544
Percentage of VariableLeaseCost100.0100.0100.0100.0

mco:CustomerBillingsAndPaymentsReceivedInAdvance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4128252122202323272223253128272526241924211719234212423192122242217181915
Percentage of CustomerBillingsAndPaymentsReceivedInAdvance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mco:DisposalGroupIncludingDiscontinuedOperationIndemnificationProvisionLiability



Period End2020-03-312019-12-312018-12-31
Value41430
Percentage of DisposalGroupIncludingDiscontinuedOperationIndemnificationProvisionLiability100.0100.00.0

us-gaap:AccruedBonusesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value37208150955115413395512461809748151101623513710274351551147330135946231162
Percentage of AccruedBonusesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedProfessionalFeesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value5943715758475062494745534740515159545351484747493932373534305749505051515035
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedRoyaltiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2025913142513131926171
Percentage of AccruedRoyaltiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value616642607574435600569538506528495465447477450457431451424396370383402385371405377358342365375367357394386369367391391
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4243454446433636363632272525262727-27272930293030292830303029303031282930293324
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value29895162747076778379766834027922910312729523221920918523968631120812191520158122
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value3937151748677864634528127322171882602201741801471974344000000
Percentage of AssetsFairValueDisclosure13.13.24.720.425.363.286.793.181.683.066.582.697.896.769.269.488.394.679.585.979.682.563.670.70.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value259921545952281051413225967313934124429374124181120812191520158122
Percentage of AssetsFairValueDisclosure86.996.895.379.674.736.813.36.918.417.033.517.42.23.330.830.611.75.420.514.120.417.536.429.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

mco:RBAInternational



Period End2020-03-31
Value1.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired100.0

mco:RegulatoryDataCorporation



Period End2020-02-13
Value1.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired0.0

us-gaap:BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value16161616161615161617161616162020201923
Percentage of BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

mco:RegulatoryDataCorporation



Period End2020-02-13
Value280
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

mco:RegulatoryDataCorporation, us-gaap:CustomerRelationships



Period End2020-02-13
Value174
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles62.1

mco:RegulatoryDataCorporation, us-gaap:Databases



Period End2020-02-13
Value86
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles30.7

mco:RegulatoryDataCorporation, us-gaap:TechnologyEquipment



Period End2020-02-13
Value17
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles6.1

mco:RegulatoryDataCorporation, us-gaap:TradeNames



Period End2020-02-13
Value3
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles1.1

us-gaap:CapitalizedContractCostNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8591677376773915
Percentage of CapitalizedContractCostNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNetNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value11711990898678
Percentage of CapitalizedContractCostNetNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-06-302018-09-302018-06-302018-03-312017-12-312013-12-312013-09-302013-03-312012-12-312009-12-31
Value48501292489891290000443
Percentage of CommercialPaper100.00.0100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value12221162970107011831075895986946
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value843840627694795750542609611
Percentage of ContractWithCustomerLiability69.072.364.664.967.269.760.661.764.6

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value379322343376388325352377334
Percentage of ContractWithCustomerLiability31.027.735.435.132.830.339.438.335.4

us-gaap:ContractWithCustomerLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value111310508559521062953771860998883
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value838836622690790746537604725
Percentage of ContractWithCustomerLiabilityCurrent75.379.672.772.574.478.369.770.372.6

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value275214233261271207233255273
Percentage of ContractWithCustomerLiabilityCurrent24.720.427.327.525.621.730.329.727.4

us-gaap:ContractWithCustomerLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value109112115118120122123126127140
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value544444543
Percentage of ContractWithCustomerLiabilityNoncurrent4.63.64.13.53.53.44.03.52.9

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value104108110114116118118121124
Percentage of ContractWithCustomerLiabilityNoncurrent95.496.495.996.596.596.696.096.597.1

us-gaap:DebtInstrumentFaceAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value675956035245539955815721500553735554558057564920409833773411340534193393
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

mco:A950SeniorNotesDueTwoThousandAndThirty



Period End2020-03-312019-12-31
Value823842
Percentage of DebtInstrumentFaceAmount12.215.0

mco:TwoThousandFifteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value549561545569561571580583614600591570534527561555569543
Percentage of DebtInstrumentFaceAmount8.110.010.410.510.110.011.610.911.110.810.311.613.015.616.516.316.716.0

us-gaap:CommercialPaper



Period End2020-03-312017-12-312017-09-30
Value487130315
Percentage of DebtInstrumentFaceAmount7.22.35.5

us-gaap:ShortTermDebtType

us-gaap:CommercialPaper



Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-03-31
Value487130320259090130214
Percentage of DebtInstrumentFaceAmount7.22.45.70.51.71.62.35.2

us-gaap:DebtInstrumentFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6584607857555638549057825052538055995702569551614101358438103787368735273244323733632772272722812255218822021742182918321319131513091303133512891270739
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

mco:A375SeniorNoteDueTwoThousandAndTwentyFive



Period End2020-03-31
Value732
Percentage of DebtInstrumentFairValue11.1

mco:A950SeniorNotesDueTwoThousandAndThirty



Period End2020-03-312019-12-31
Value769847
Percentage of DebtInstrumentFairValue11.713.9

mco:TwentyThirteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5365515515475375225225255315475515505465395685695535335315355575485385375255015020
Percentage of DebtInstrumentFairValue8.19.19.69.79.89.010.39.89.59.69.710.713.315.114.915.015.015.116.416.516.619.819.723.623.322.922.80.0

mco:TwoThousandEighteenSeniorNoteDueTwoThousandFourtyEight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value463492496461435409
Percentage of DebtInstrumentFairValue7.08.18.68.27.97.1

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyNine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value445453451436420407
Percentage of DebtInstrumentFairValue6.87.57.87.77.67.0

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value301306305305302298298299
Percentage of DebtInstrumentFairValue4.65.05.35.45.55.25.95.6

mco:TwoThousandFifteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value5776045966155925855946016306176075775475346005775755205315185520
Percentage of DebtInstrumentFairValue8.89.910.410.910.810.111.811.211.310.810.711.213.414.915.715.315.614.716.416.016.40.0

mco:TwoThousandFourteenSeniorNotesThirtyYear



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value7387577687136766386676756927227016956666617437346686173113093403333130
Percentage of DebtInstrumentFairValue11.212.513.412.712.311.013.212.612.412.712.313.516.218.519.519.418.117.59.69.510.112.011.50.0

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyEight



Period 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
Value509523526506489472469472475493496492
Percentage of DebtInstrumentFairValue7.78.69.19.08.98.29.38.88.58.78.79.5

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree



Period 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
Value496507506501492476478478481494496496
Percentage of DebtInstrumentFairValue7.58.38.88.99.08.29.58.98.68.78.79.6

mco:TwoThousandSeventeenSeniorNotesDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value497507506504499489488488500
Percentage of DebtInstrumentFairValue7.58.38.88.99.18.59.79.18.8

mco:TwoThousandTwelveSeniorNotesDueTwoThousandTwentyTwo



Period End2020-03-312019-12-31
Value521531
Percentage of DebtInstrumentFairValue7.98.7

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value20171516171788891010423333
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

mco:A375SeniorNoteDueTwoThousandAndTwentyFive



Period End2020-03-31
Value1000000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet5.0

mco:TwentyThirteenSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value111111111111222222
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet5.05.99.18.78.58.719.519.320.219.118.818.446.572.465.662.961.160.5

mco:TwoThousandEighteenSeniorNoteDueTwoThousandFourtyEight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value776666
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet35.041.242.941.037.938.7

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyNine



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value332223
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet15.017.618.218.016.417.3

mco:TwoThousandEighteenSeniorNoteDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.0300000.0300000.0300000.0400000.0400000.0400000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.00.01.91.91.72.34.94.5

mco:TwoThousandFourteenSeniorNotesThirtyYear



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-3-4-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet-15.0-23.5-20.8-19.9-18.1-18.5-40.2-37.5-37.1-35.1-32.7-32.0-76.7-113.8-103.1-94.3-94.4-89.5

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyEight



Period 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
Value444444455555
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet20.023.528.628.026.027.259.856.857.355.352.552.4

mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree



Period 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
Value110000011111
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet5.05.94.55.04.55.211.011.411.211.710.911.7

mco:TwoThousandSeventeenSeniorNotesDueTwoThousandTwentyOne



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value010001111
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.05.94.55.05.15.813.412.513.8

us-gaap:ShortTermDebtType

us-gaap:CommercialPaper



Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-12-31
Value2010000
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet10.00.66.81.21.11.11.1

us-gaap:DeferredIncomeTaxAssetsNet



Period End2020-03-312019-12-312019-09-302018-12-31
Value165229189197
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302018-12-31
Value424357355351
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear

us-gaap:UnfundedPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-30
Value33
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1000000.0900000.01000000.01000000.0500000.0700000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear33.329.00.00.00.00.00.0

us-gaap:DepositAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value141312141313131112121211111011111111121211111111101099910101111121111119
Percentage of DepositAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value259921545952281051413225967313934124429374124181120812191520158122
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value259921545952281051413225967313934124429374124181120812191520158122
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType, us-gaap:VariableRate

us-gaap:DerivativeAverageFixedInterestRate

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyPaid, mco:FixedPayWeightedAverageInterestRate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.01430.01430.01430.01430.0151
Percentage of DerivativeAverageFixedInterestRate100.0100.0100.0100.0100.0

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyReceived, mco:FixedReceivedWeightedAverageInterestRate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.03960.03960.03960.03960.0413
Percentage of DerivativeAverageFixedInterestRate276.9276.9276.9276.9273.5

us-gaap:DerivativeFairValueOfDerivativeAsset



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value259921545928514132259673139341244293741241811208121915201581284321
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OtherAssets, us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value145561162119
Percentage of DerivativeFairValueOfDerivativeAsset56.060.975.436.068.6

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



Period End2020-03-312019-12-312019-09-302018-12-31
Value8527327
Percentage of DerivativeFairValueOfDerivativeAsset32.829.321.226.5

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

us-gaap:OtherCurrentAssets, us-gaap:ForeignExchangeForward, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value299051
Percentage of DerivativeFairValueOfDerivativeAsset11.29.80.48.54.9

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2308315454265012957321243293636201511197111613181381183
Percentage of DerivativeFairValueOfDerivativeAsset88.890.299.691.595.193.13.853.715.782.3100.094.899.296.298.396.686.681.581.695.895.686.990.385.890.890.289.497.691.392.070.8

us-gaap:DerivativeFairValueOfDerivativeLiability



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14301403550581588631631605478459433427480481469444453452436280112022344611716128
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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



Period End2020-03-312019-12-31
Value470
Percentage of DerivativeFairValueOfDerivativeLiability3.30.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value100102
Percentage of DerivativeFairValueOfDerivativeLiability0.10.00.01.90.5

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

us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:ForeignExchangeForward, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302018-03-312017-12-312017-09-302016-12-31
Value100518334240
Percentage of DerivativeFairValueOfDerivativeLiability0.70.01.00.31.45.30.60.30.90.2

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

us-gaap:LongTermDebt, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-31
Value13721403
Percentage of DerivativeFairValueOfDerivativeLiability95.9100.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value480010812310501211101134345712
Percentage of DerivativeFairValueOfDerivativeLiability3.40.00.01.91.41.90.60.20.21.20.22.70.358.875.00.062.570.884.693.078.366.252.388.694.6

us-gaap:DerivativeLiabilities



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value58512131638471655265303713126662801
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value58512131638471655265303713126662801
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent



Period End2020-03-312019-12-31
Value470
Percentage of DerivativeLiabilitiesCurrent100.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DerivativeNotionalAmount

us-gaap:InterestRateSwap, us-gaap:FairValueHedging



Period End2020-03-312019-12-312019-09-302018-12-31
Value1580108015801330
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

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

us-gaap:CurrencySwap, mco:NetInvestmentHedgingSettlementYear2021, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-30
Value688688687
Percentage of DerivativeNotionalAmount43.563.743.5

us-gaap:CurrencySwap, mco:NetInvestmentHedgingSettlementYear2022, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-30
Value438438438
Percentage of DerivativeNotionalAmount27.740.627.7

us-gaap:CurrencySwap, mco:NetInvestmentHedgingSettlementYear2023, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-30
Value442442441
Percentage of DerivativeNotionalAmount28.040.928.0

us-gaap:CurrencySwap, mco:NetInvestmentHedgingSettlementYear2024, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-30
Value443442442
Percentage of DerivativeNotionalAmount28.040.928.0

us-gaap:CurrencySwap, mco:NetInvestmentHedgingSettlementYear2026, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-31
Value450
Percentage of DerivativeNotionalAmount28.5

us-gaap:ForwardContracts, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-31
Value300
Percentage of DerivativeNotionalAmount19.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, mco:TwoThousandSeventeenFiveYearPrivatePlacementDueTwoThosandTwentyThree



Period End2020-03-312019-12-312019-09-302018-12-31
Value2502502500
Percentage of DerivativeNotionalAmount15.823.115.80.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, mco:TwoThousandSeventeenSeniorNotesDueTwoThousandTwentyEight



Period End2020-03-312019-12-31
Value5000
Percentage of DerivativeNotionalAmount31.60.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyPaid



Period End2020-03-312019-12-312019-09-302018-12-31
Value246020102010710
Percentage of DerivativeNotionalAmount155.7186.1127.253.4

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyReceived



Period End2020-03-312019-12-312019-09-302018-12-31
Value280023002300830
Percentage of DerivativeNotionalAmount177.2213.0145.662.4

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TransactionType, us-gaap:VariableRate

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyPaid, mco:FixedPayWeightedAverageInterestRate



Period End2020-03-312019-12-312019-09-30
Value107910791079
Percentage of DerivativeNotionalAmount68.399.968.3

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyPaid, mco:ThreeMonthsEuribor



Period End2020-03-312019-12-312019-09-302018-12-31
Value1381931931710
Percentage of DerivativeNotionalAmount87.486.258.953.4

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, mco:CurrencyReceived, mco:ThreeMonthsUsLibor



Period End2020-03-312019-12-312019-09-302018-12-31
Value158010801080830
Percentage of DerivativeNotionalAmount100.0100.068.462.4

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

mco:ForeignCurrencyForwardContractsToSellEurosforGBP, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-30
Value025180
Percentage of DerivativeNotionalAmount0.02.311.4

mco:ForeignCurrencyForwardContractsToSellUsDollarsForCanadianDollars, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302018-12-31
Value94839699
Percentage of DerivativeNotionalAmount5.97.76.17.4

mco:ForeignCurrencyForwardContractsToSellUsDollarsForEuros, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302018-12-31
Value61421532212
Percentage of DerivativeNotionalAmount3.939.033.716.0

mco:ForeignCurrencyForwardContractsToSellUsDollarsForGbp, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302018-12-31
Value451235144310
Percentage of DerivativeNotionalAmount28.521.89.123.3

mco:ForeignCurrencyForwardContractsToSellUsDollarsForOtherForeignCurrencies, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-30
Value594140
Percentage of DerivativeNotionalAmount3.73.82.6

mco:ForeignCurrencyForwardContractsToSellUsdForJapaneseYen, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302018-12-31
Value29293014
Percentage of DerivativeNotionalAmount1.82.71.91.1

us-gaap:SubsequentEventType

us-gaap:DividendsPayableAmountPerShare

us-gaap:SubsequentEvent



Period End2020-02-11
Value0.56
Percentage of DividendsPayableAmountPerShare100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value16015295101132112919313612993799689717391836965898670697977626367796664807360596951
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

mco:PerformanceBasedRestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-31
Value312429354027353743312725271314162314141315
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value10791179118101210131691215912
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized32.325.326.027.921.325.927.128.939.543.771.277.867.20.00.00.00.00.0

us-gaap:RestrictedStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value252147175208239140164191220126150174200109129150172951131321488196111126708394106566675
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized812.9612.5594.3582.1586.3512.8467.6510.4510.7408.4541.9683.2724.5800.7887.7902.4724.8685.00.00.00.0549.70.00.00.0516.90.00.00.0364.50.00.0

us-gaap:EquitySecuritiesFvNi



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value39371533
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value39371533
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value12769714364371022
Percentage of EquitySecuritiesFvNi3271.832366.75666.22897.43070.3

us-gaap:MutualFund



Period End2020-03-312019-12-31
Value393
Percentage of EquitySecuritiesFvNi100.0100.0

us-gaap:FinancialInstrument

us-gaap:EquitySecuritiesFvNiCost

us-gaap:CertificatesOfDeposit



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value12769714364371022
Percentage of EquitySecuritiesFvNiCost100.0100.0100.0100.0100.0

us-gaap:MutualFund



Period End2020-03-312019-12-31
Value463
Percentage of EquitySecuritiesFvNiCost3.60.3

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:ComputerSoftwareIntangibleAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value13313111811510710196898678706358545552514746454243424238
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value244235216206230214200186175159144133128124121118114110107104100989593908683797674696562585554514942
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization183.5179.4182.4179.1213.7210.4208.8208.1202.3205.0204.5211.2220.8226.6220.4223.4223.3230.6231.1231.6238.6228.1225.2219.00.0223.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value32343129333130302928272626252524242323222121202020191918171616151413212119
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization24.126.026.425.831.031.131.733.434.336.739.542.644.646.145.246.347.149.149.950.151.449.549.348.70.050.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value313028263634333129262422211919171716151414131212121111101010109998
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization23.322.923.623.333.933.534.334.533.734.234.635.436.036.234.433.633.334.033.732.933.230.930.229.30.030.20.00.00.00.00.00.00.00.00.0

us-gaap:TradeSecrets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value28292828282828282828272626252524232322222120201919181717161615141413121211108
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization21.122.124.124.826.327.729.431.332.436.039.142.644.946.645.246.146.348.448.648.650.748.647.646.10.047.70.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ComputerSoftwareIntangibleAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value3613723543533493533483493663583549188879191937475777579807271
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1460132512641284136013671312131213711345132531731331031331531629829930530331031127223523721221021421921821621921714214814714580
Percentage of FiniteLivedIntangibleAssetsGross404.4356.2356.5363.6389.7387.1376.2376.1374.7375.1374.3345.9352.7353.6343.8343.1337.8399.5396.2395.3403.3389.0388.4375.20.0334.40.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value177807978707058565857574443434343444444444444434226262424242424242424373937
Percentage of FiniteLivedIntangibleAssetsGross49.021.522.322.220.319.916.916.315.916.016.348.248.949.647.647.847.259.358.157.858.756.153.759.20.036.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value149150147146155155156158164161160767475757676727375747676813031282728282828282817
Percentage of FiniteLivedIntangibleAssetsGross41.340.341.541.344.643.944.845.545.045.145.483.984.185.982.583.181.696.997.597.499.195.995.6112.10.044.10.00.00.00.00.00.00.00.00.0

us-gaap:TradeSecrets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value303029302929302930303030292930303029293030303031303131313131313131313131313125
Percentage of FiniteLivedIntangibleAssetsGross8.38.18.48.58.68.48.68.68.28.48.532.733.734.132.932.732.239.839.539.140.138.338.542.80.043.80.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value10051108202
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312011-12-312010-12-31
Value4134373436223677377437933673367438433765373410661041103510531059106398810021033677636649642465
Percentage of GoodwillGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mco:MoodysAnalytics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312011-12-312010-12-31
Value38203419330233643507353534013389355234803446780767758773775778704709298666624637631454
Percentage of GoodwillGross92.491.691.291.592.993.292.692.292.492.492.373.273.773.373.573.273.271.270.828.998.398.398.298.397.6

mco:MoodysInvestorsService



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312011-12-312010-12-31
Value3143153203122672572722852912852872862742772792842842842922981111111111
Percentage of GoodwillGross7.68.48.88.57.16.87.47.87.67.67.726.826.326.726.526.826.828.829.228.91.71.71.81.72.4

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-03-312012-12-312011-12-31
Value1212121212121212121212121212121212-12121212-12120
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0