MRK


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementGeographical
us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementGeographical

us-gaap:CostOfGoodsAndServicesSold
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

us-gaap:ResearchAndDevelopmentExpense
us-gaap:ConsolidationItems
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

us-gaap:InterestExpense
us-gaap:ConsolidationItems

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement
us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:InventoryFinishedGoods

us-gaap:InventoryLIFOReserve

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:BusinessAcquisition

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:ProductOrService, us-gaap:BalanceSheetLocation
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherAssetsNoncurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:LiabilitiesCurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

us-gaap:DebtCurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:DividendsPayableCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:MinorityInterest

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidationItems

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:RepaymentsOfLongTermDebt

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ProceedsFromRepaymentsOfShortTermDebt
us-gaap:ConsolidationItems
mrk:AmortizationOfPurchaseAccountingAdjustments
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
mrk:CollaborativeArrangementProfitSharing
us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
mrk:CollaborativeArrangementSalesNet
us-gaap:CounterpartyName
mrk:ContingentPaymentsCollaborativeArrangement
us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement
us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

mrk:CostsExpensesAndOther
us-gaap:CounterpartyName
mrk:Licenseoptionpaymentrelatedtocollaborativearrangement
us-gaap:CounterpartyName, us-gaap:StatementScenario
us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement
mrk:MilestonePaymentsMadetoCollaborativePartner

mrk:Noncontrollinginterestchangesinownershipinterestother
us-gaap:StatementEquityComponents

mrk:OtherNonoperatingIncomeExpenseOther
us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement
mrk:ProbableContingentPaymentsCollaborativeArrangement

mrk:RestructuringReserveNoncashActivity
us-gaap:RestructuringCostAndReserve

mrk:SalesDiscounts
us-gaap:ConsolidationItems
mrk:SegmentReportingUnallocatedOtherExpensesNet
us-gaap:CounterpartyName
mrk:UpfrontAndMilestonePaymentsMadeToCollaborativePartner

us-gaap:AccountsReceivableSale

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

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

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:RetirementPlanType
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EquitySecuritiesFvNiGainLoss
us-gaap:StatementScenario

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:GoodwillAndIntangibleAssetImpairment

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:InterestPaid

us-gaap:InvestmentIncomeInterest
us-gaap:ConsolidationItems

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForRestructuring
us-gaap:RestructuringCostAndReserve
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:CounterpartyName, us-gaap:StatementScenario
us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

us-gaap:ProceedsFromSaleOfIntangibleAssets

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax
us-gaap:StatementEquityComponents

us-gaap:RestructuringAndRelatedCostIncurredCost

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityOtherShares
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:BusinessAcquisition
mrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredLiabilitiesAssumedOtherAssetsAndLiabilitiesNet

mrk:DebtSecuritiesandEquitySecuritiesFVNI

mrk:InventoryNetAndInventoryNoncurrent
us-gaap:StatementScenario
mrk:LesseeOperatingLeaseLeaseNotyetCommencedAmount

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

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:BusinessAcquisition, us-gaap:ContingentConsiderationByType

us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType
us-gaap:BusinessAcquisition
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:CashEquivalentsAtCarryingValue

us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument

us-gaap:DebtInstrumentFairValue

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxesAndOtherAssetsCurrent

us-gaap:DeferredIncomeTaxesAndOtherAssetsNoncurrent

us-gaap:DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeAssetNotOffsetPolicyElectionDeduction

us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation

us-gaap:DerivativeCollateralObligationToReturnCash

us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction

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

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

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedge
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

us-gaap:InventoryGross

us-gaap:InventoryNoncurrent
us-gaap:PublicUtilitiesInventory

us-gaap:InventoryWorkInProcessAndRawMaterials
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:ValuationAllowancesAndReservesType
us-gaap:LitigationReserve

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesNoncurrent
us-gaap:DerivativeInstrumentRisk
us-gaap:NumberOfInterestRateDerivativesHeld
us-gaap:DerivativeInstrumentRisk, us-gaap:LongtermDebtType

us-gaap:OtherInventorySupplies

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestructuringAndRelatedCostExpectedCost1
us-gaap:StatementScenario

us-gaap:RestructuringReserve
us-gaap:RestructuringCostAndReserve

us-gaap:StockholdersEquityBeforeTreasuryStock
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:TradingSecurities
us-gaap:FairValueByMeasurementFrequency

us-gaap:TreasuryStockShares

Tables

  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄17881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788NANANA
us-gaap:CommonStockSharesIssued ████████████████████████████████▁▁▁▁▁▁35773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357635763576357635763576NANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock████████████████████████████████▆█▆█▆█▆▁3577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735763577357635773576357735763573NA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock████▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁10481053103810261010994985918907885880851850837828815811808796775753749739716677648650651560550533538535536525494492495497492NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█25362547NA257225882603NA267826962710NA272727522766NA278627892795NA283628502865NA291129492971296030103053NA307930723074NA309131103104NA310231253141
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█25272533NA255825742585NA266226832695NA272727342745NA276527682774NA281428262835NA287929172934292729773022NA304530413043NA307030863084NA307831053114
us-gaap:EarningsPerShareBasic ▅▅▄▄▄▅▄▄▃▃▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂1.191.270.92999999999999970.741.041.130.70.730.640.27-0.38-0.020.710.56-0.209999999999999960.790.440.410.35000000000000010.650.240.342.540.310.690.580.380.30.530.29999999999999980.570.590.570.50.550.650.34-0.169999999999999980.110.240.1
us-gaap:EarningsPerShareDiluted ▅▅▄▄▄▅▄▄▃▃▁▂▄▃▁▄▃▃▃▃▃▃█▃▄▃▃▃▃▃▃▃▃▃▃▄▃▂▂▃▂1.181.260.91999999999999990.741.031.120.690.730.630.27-0.38-0.020.710.56-0.21000000000000020.780.430.40.34000000000000010.640.240.332.50.310.680.570.380.30.520.290000000000000040.560.580.560.490.550.650.34-0.159999999999999980.110.240.09
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Revenues ▅▇▇█▇▄▅▄▄▃▄▃▂▁▃▄▂▁▃▃▂▁▄▄▅▃▅▅▄▇▆█▆█▇▇▆▇▅▆▆1087212057118681239711760108161099810794104651003710433103259930943410115105369844931210215100739785942510482105571093410264110321101010671117371148812311117311229412022121511158012094111251134611422
 us-gaap:Revenues us-gaap:ConsolidationItems us-gaap:OperatingSegments▅▇▇█▇▅▅▅▄▃▄▄▃▁▃▄▂▁▃▃▂▁▄▄1078011892116971226311632107271092110734104281006810373102569815921899051042096799009101089771947591951047110455NANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Keytruda,mrk:Pharmaceuticalsegment██▇▇▆▆▅▅▄▄▄▃▃▂▂▂▂▂▁▁▁▁▁▁33883284311130702634226921511889166714641297104788158448335631424921415911083514NANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:OtherPharmaceutical,mrk:Pharmaceuticalsegment▄▆█▇█▅▄▂▃▆▃▁▃11031194126712291268114010679801053118610489521064NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Keytruda,country:US,mrk:Pharmaceuticalsegment█▇▇▇▅▄▄▄▃▂▂▁▁20431906178017431498128412441109959838787604556NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Keytruda,mrk:International,mrk:Pharmaceuticalsegment████▆▅▅▄▄▃▂▂▁13451378133113271136985907780707626510442325NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:AnimalHealthsegment▅█▆▆▆▃▃▃▅▄▂▃▁▁11011214112211221124102510361021109010659811000955939NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Pharmaceuticalsegment▅▇▇█▇▅▅▅▄▃▄▃▃▁▃▄▂▁▃▃▂▁▄▃9679106551053311095104609663983096589282891992899156875981858904944387008104902789258564826693709134NANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementGeographical us-gaap:OperatingSegments,country:US▄▆▆█▆▃▄▅▁▁▂▃▂▁46125121507555155140450847705010418941074317458743004138NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementGeographical us-gaap:OperatingSegments,mrk:International▆█▇█▇▆▅▄▆▅▅▃▃▁61686771662067476491621961515725624059606056566955155080NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,country:US,mrk:Pharmaceuticalsegment▄▆▆█▆▃▄▆▂▁▂▃▂4270471446945132475841754402464938223716396741973929NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:International,mrk:Pharmaceuticalsegment▅█▇█▆▅▅▂▅▃▄▂▁5409594158395962570254885428501054615202532249594830NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementGeographical country:US▄▆▆█▆▃▄▆▂▁▂▃▂▁46345137514255255144451547875030424341334328459443084195NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementGeographical mrk:International▅█▇█▇▅▅▃▅▄▅▃▃▁62386920672668726616630162125764622259046105573256235239NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementGeographical us-gaap:EMEA▄█▆▅▅▅▄▃▅▅▅▃▂▁30713534325531893163310329952884314431913104294128042629NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServicesSold ▂▃▆█▄▁▃▅▄▂▄▃▁3159331236693990340130523289361934173184344033073116NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ▂▃▃▅▃▂▃▂▃▅▃▇▂▂█▁▂▁▂▁▁▂▃▁▁▁▁▂▂▃▂▂▂▃▂▂▂█▃▃▂21232209254832042189193122142068227431962281438317491796464916642151165917981500167017372283165916641574166021011907222419182165186224191954193621584439232221792051
 us-gaap:ResearchAndDevelopmentExpense us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems▃▃▄▅▃▂▃▂▃▅█▂▂▂█▁▂▁▂▁▁▂▂▁199420972454311020931843197518552041298244001829152715994433144418331373156112911460156118391332NANANANANANANANANANANANANANANANANA
us-gaap:SellingGeneralAndAdministrativeExpense ▁▂▄▂▃▂▃▂▂▂▂▁▂▁▂▁▂▁▂▂▃▂▄▄▄▃▃▅▄▆▅▆▅█▆▇▅█▅▅▆23782555288925892712242526432443250825082579240124382411259323932458231826152472262426012925297529732734280331402987339030633249307437043340352531643656319231753222
us-gaap:InterestExpense ▆▆▇██▆▅▄▄▃▄▄▄▃▃▂▂▂▂▁▂▁▁▄▃▃▆▅▃▄▂▂▄▄▄▃▃▂▂▃▃209212219231233209203190194185190189193182180170171172169165174164165191188188215201184190178172195192189182186176173185181
 us-gaap:InterestExpense us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems▆▆▇██▆▅▄▄▃▄▄▄▃▃▂▂▂▂▁▂▁▁▄209212219231233209203190194185190189193182180170171172169165174164165191NANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▁▂▁▂█▂▂▂▂▂▁▁▂▂▂▂▂▂▁▁▁▂▂390-71223-35-140-188-110172482911886-58-58-632-22-19-48-903170-739-551061914255839-172-201-282-670-200-103-142-137-66-121-622-309-1108281-167
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▄▃▃▃▃▃▃▃▂▃▂▃▃▁▃▃▃▂▃▂▂█▃▃▃▃▂▃▂▃▃▃▃▃▃▃▁▂▂3519383827912347325930672604266520861345187920024392003-1356288715041624816239780713811181114901891209115251245155013342218268025071581235216721729-7014981241NA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems us-gaap:OperatingSegments▅▇▆█▆▅▄▅▃▃▃▃▃▁▂▄▂▁▂▂▁▁▃▃696779567248816875186991657868936302628062566411612156325860655158445503591960705689560360976311NANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:AnimalHealthsegment▄█▂▅▄▅▃▄▆▄▁▃▃▅407478366423405415386409450413350389395417NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Pharmaceuticalsegment▅▇▆█▆▅▄▅▃▃▃▃▂▁▂▄▂▁▂▂▁▁▃▃656074776887774771156574618364795826580458645929561351805482616254205117557056415282516556895772NANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▃▃▃▃▃▂▃▃▃▃▆▂▃▃▁▃▂▃▂▃▂▃█▃▂▃▃▂▂▃▃▃▃▂▃▂▃▂▂▃▂5096194284406152058267073706042917251488447-769699295494-1665661194234484648-142360375310-6638545586074038628-382658-201126461286
us-gaap:ProfitLoss ▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃▃▃▃▃▃▃▃▃▃▄▃▁▂▃▂301032192363190726442862177819581716741-1038-5119511556-5872188120911309821831688958732784220331731115093516169491763182017671543172420541071-500372780330
us-gaap:ComprehensiveIncomeNetOfTax ▅▅▄▄▅▅▄▄▄▃▂▃▄▄▁▄▄▃▄▄▃▃█▃300030211553187326543114143319211645860-10119319321697-15692018131310791402158552211095991341NANANANANANANANANANA180024001100NA1500-335-506
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▇▆▄▆▇▇▅▆▆▇▇▇▇▇▃▆▇▆█▆▆▇▂▅▆▇▇▆▇▁▇▇▆▅▇█-2-198-803-28-16199-394-29-6212435149-14146-974-166108-46425-241-165156-1325-554-2651862-13153-16428691-85-41963394NANANANANA
us-gaap:NetIncomeLoss ▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃▃▃▃▃▃▃▃▃▃▄▃▁▂▃▂300232192356190126702915182719501707736-1046-5619461551-5952184120511259771826687953731689520041705112490615939071729179317381512169220241043-532342752299
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃300232192356190126702915182719501707736-1046-5619451551-5952185120511259771826686953731689520041705NANA15939071730179317381512169320241043-532342752299
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▅▅▅▅▃▁▁▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▆▁▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇8076-26-53-4989585558445551511-532926262923423427293132302832302831
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest8NA76-26-53-4989585658445552511-522926NANA23423327293131302832302831
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 EBT Margin us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▄▅▅▄▄▃▃▃▂▁▃▃▄▆▆▄▅█▄██▆▂▄9216517113412889776037-31606911521621011616530310730231023011102NANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems us-gaap:OperatingSegments▅▇▇█▇▅▅▅▄▃▄▄▃▁▃▄▂▁▃▃▂▁▄▄1078011892116971226311632107271092110734104281006810373102569815921899051042096799009101089771947591951047110455NANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:AnimalHealthsegment▅█▆▆▆▃▃▃▅▄▂▃▁▁11011214112211221124102510361021109010659811000955939NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mrk:Pharmaceuticalsegment▅▇▇█▇▅▅▅▄▃▄▃▃▁▃▄▂▁▃▃▂▁▄▃9679106551053311095104609663983096589282891992899156875981858904944387008104902789258564826693709134NANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:AllOtherSegmentsNA2342464839555556841031001011033-2477977979905108184691192911011321NANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▃▂▂▁▁▁▁▂▂▂▂▃▄▅▄▅▅▅▆▆▆█▅▆▅█▇█▇▇▇▇▇▇▇▇▇▇9061584913843978333183965823548263785130850408604187872916769280496561953779833596475987551017791012321025821083459833510180897860108460106419106876106200106132106301105525105509105128106534106195105865105781NANANA
 us-gaap:Liabilities us-gaap:CounterpartyName,us-gaap:ProductOrService,us-gaap:TypeOfArrangement mrk:AstraZeneca,mrk:Lynparza,mrk:SalesBasedMilestones400NA300NA300NA600NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Liabilities us-gaap:CounterpartyName,us-gaap:ProductOrService,us-gaap:TypeOfArrangement mrk:Eisai,mrk:Lenvima,mrk:SalesBasedMilestones370NA682NANA282268NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity ▃▂▂▁▁▁▁▂▂▂▂▃▄▅▄▅▅▅▆▆▆█▅▆▅█▇█▇▇▇▇▇▇▇▇▇▇9061584913843978333183965823548263785130850408604187872916769280496561953779833596475987551017791012321025821083459833510180897860108460106419106876106200106132106301105525105509105128106534106195105865105781NANANA
us-gaap:StockholdersEquity ▁▁▁▁▁▁▁▃▃▃▃▄▄▄▄▅▅▅▅▆▆▆▆▆▆▇▆▆▇▇████████2764226205259072683827635275392670132422325293366834336382483946339837400884374443357438064467645587464484776548647452244835849975474194750053029530205574755194548605451755140554965438454376NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▃▂▂▂▁▂▂▂▁▁▁▃▃▄▄▃▃▃▃▃▃▅▅▅▅█▇▆▆▅▆▆▅▅▅▄▄▃2934326174274832614224298253512587526836240642408524766279192816731530306142944027926287722976428567283193292733173347233358741240377653699535244348573622935639343443318134109323683102429064NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▃▄▃▂▃▃▃▁▁▂▃▃▅▂▃▂▄▃▃▂▃▃▅▄▇▆▇▆▆██▇▆▆▅▅▄▄▃▃111037425967678696659807679657826531044836092790177861170865157907660897008524754869227980744111370974315828140901509013024134511736016752146561353114253123421169510900987486668236
us-gaap:AccountsReceivableNetCurrent ▅▆▂▇▆▅▃▄▄▄▂▅▄▃▃▄▃▂▁▁▁▂▂▁▃▃▅▅▆▅▆▆█▇▆▇757781826778844279647608707173747287724568737671743970667018736469166850648464146510667066266515702271887578777979657672795281528726826181368475NA7344NANANA
 us-gaap:ReceivablesNetCurrent us-gaap:CounterpartyName,us-gaap:BalanceSheetLocation,us-gaap:TypeOfArrangement mrk:AstraZeneca,us-gaap:OtherCurrentAssets,us-gaap:CollaborativeArrangement█▃▁168142128NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ReceivablesNetCurrent us-gaap:CounterpartyName,us-gaap:BalanceSheetLocation,us-gaap:TypeOfArrangement mrk:BayerAG,us-gaap:OtherCurrentAssets,us-gaap:CollaborativeArrangement█▂▁625049NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ReceivablesNetCurrent us-gaap:CounterpartyName,us-gaap:BalanceSheetLocation,us-gaap:TypeOfArrangement mrk:Eisai,us-gaap:OtherCurrentAssets,us-gaap:CollaborativeArrangement█▁▃173140150NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet ▆▅▅▅▅▄▃▃▃▃▂▃▃▃▂▃▃▂▁▂▃▄▄▅▆▇███▇█▆▇▆▆▆▆▅60565846597858555847571254405416517853825096526354075146486652445248510247005123530655395571581961366376674167666773653567316249633962546239622560575868NANANA
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  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
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  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
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us-gaap:NetIncomeLoss ▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃▃▃▃▃▃▃▃▃▃▄▃▁▂▃▂300232192356190126702915182719501707736-1046-5619461551-5952184120511259771826687953731689520041705112490615939071729179317381512169220241043-532342752299
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃300232192356190126702915182719501707736-1046-5619451551-5952185120511259771826686953731689520041705NANA15939071730179317381512169320241043-532342752299
us-gaap:ProfitLoss ▄▅▄▃▄▄▃▄▃▂▁▂▄▃▁▄▃▃▃▃▂▃█▃▄▃▃▃▃▃▃▃▃▃▃▄▃▁▂▃▂301032192363190726442862177819581716741-1038-5119511556-5872188120911309821831688958732784220331731115093516169491763182017671543172420541071-500372780330
us-gaap:DepreciationDepletionAndAmortization ▃▁▂▁▂▂▃▃▄▃▃▃▄▄▄▄▆▇▇▇▇▇▇▇██104882193684597389810951061122611371128115411621193115511751550156115601570160816371573161117531754NANA1674166117231804179018611903183218311866188019481687
 us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems▃▂▃▂▄▂▁▁▁▂▁▁▁▂▂▂▄▄▃▃▃▃▇█390381404382427359328324332350342334332370357365438430398383393396557595NANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ██▇▇▆█▇▇▇▇▁▆▇▇▃█▇▇█▆▇▇▅▆▄▆4082-170-237-343194-118-133-228-30-2020-329-218-54-145655-50-7082-463-204-179-827-527-942-304NANA-7195282-324-41-563-133-627-214-349-424-471152
us-gaap:ShareBasedCompensation ▆▅▅▅▅▄▄▄▄▃▃▃▃▂▃▃▃▂▃▃▃▂▂▃▃▁▂▃▂▃▄▄▃▃▃▅▄▅▇█▇12110811110111193879190808076827475778068787583636975785668756778889376828610793109126142132
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▄▄▄▃▅▅▅▅▄▄▅▄▆▃▄▄▅▄▄▆▁█▂▄▂-882-1628-763191-242536821781660673-197-58671-11273193-2563-890-14981741-617-612525-66057204-3722-49-3807NANA-1153-4398-1839-298-270-1684-263-1048105-1007194464-3148
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▅▅▄▅▅▃▅▄▄▃▆▃▆▅▅▄▄▄▄▃█▁▆▂▆1137-1490-2011-3152-2084-1614-5566-1905-2967-2722-5785536-62181461-1977-835-3381-2851-2407-2533-54855155-96431279-83691620NANA-1421-1218-738-586-725-2231-2244-1257-1172-1295-1625-3463942
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▇▁▁▁▁█▁▁▁▁4445000049580000NANANANA10710800-2-179413145010NANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▁▃▁▁▁▁▂▁▃▂▂▁▁▁▁▁▃▂▁▁▁▄█▁▁▁1195100001280-12005100380201300035150085110329026610223NANA506182022701212614652634622
us-gaap:PaymentsOfDividendsCommonStock █▇▄▄▆▅▁▂▂▂▂▂▂▂▁▁▂▁▁▁▂▁▁▂▃▂15771551140513941468142812771285131112991283128313071294127112741300127912631272130212801259128213391290NANA1306128012771280127911651175117611751175118111891189
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▃▂▃▂▂█▂▃▂▃▁▂▂▂▂▂▂▂▃▂▂▃▄▄▂0128110501405123510905933996159656617021591134101910168456609131181128170910151620267022461167NANA58011524545294565621045NANA0296NANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RepaymentsOfLongTermDebt ▁▃▁▁▁▁▂▁▃▂▂▁▁▁▁▁▃▂▁▁▁▄█▁▁▁1195100001280-12005100380201300035150085110329026610223NANA506182022701212614652634622

us-gaap:CommonStockValue



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881781
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.12.12.12.12.22.22.12.12.12.02.01.91.91.91.81.91.81.81.81.71.71.81.81.81.61.71.71.71.71.71.71.71.71.71.71.71.71.71.6

Common Stock Value

us-gaap:CommonStockSharesIssued



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773576357635763576357635763562
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value3577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773577357735773576357735763577357635773576357335632984
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0
us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value10481053103810261010994985918907885880851850837828815811808796775753749739716677648650650651560550533538535536525494492495497492454876
Percentage of CommonStockSharesIssued29.329.429.028.728.227.827.525.725.424.724.623.823.823.423.122.822.722.622.321.721.120.920.720.018.918.118.218.218.215.715.414.915.015.015.014.713.813.813.80.00.012.70.0

Common Stock Shares Issued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value25362547257225882603267826962710272727522766278627892795283628502865291129492971296030103053307930723074309131103104310231253141
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value25272533255825742585266226832695272727342745276527682774281428262835287929172934292729773022304530413043307030863084307831053114
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:EarningsPerShareBasic



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.191.270.92999999999999970.741.041.130.70.730.640.27-0.38-0.020.710.56-0.209999999999999960.790.440.410.35000000000000010.650.240.342.540.310.690.580.380.30.530.29999999999999980.570.590.570.50.550.650.34-0.169999999999999980.110.240.1
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareDiluted



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.181.260.91999999999999990.741.031.120.690.730.630.27-0.38-0.020.710.56-0.21000000000000020.780.430.40.34000000000000010.640.240.332.50.310.680.570.380.30.520.290000000000000040.560.580.560.490.550.650.34-0.159999999999999980.110.240.09
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:Revenues



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1087212057118681239711760108161099810794104651003710433103259930943410115105369844931210215100739785942510482105571093410264110321101010671117371148812311117311229412022121511158012094111251134611422
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9216517113412889776037-31606911521621011616530310730231023011102
Percentage of Revenues0.81.41.41.11.10.80.70.60.4-0.30.60.71.22.32.11.11.73.31.03.03.22.40.11.0
Percentage of Revenues0.81.41.41.11.10.80.70.60.4-0.30.60.71.22.32.11.11.73.31.03.03.22.40.11.0
Percentage of Revenues us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1078011892116971226311632107271092110734104281006810373102569815921899051042096799009101089771947591951047110455
Percentage of Revenues99.298.698.698.998.999.299.399.499.6100.399.499.398.897.797.998.998.396.799.097.096.897.699.999.0
Percentage of Revenues99.298.698.698.998.999.299.399.499.6100.399.499.398.897.797.998.998.396.799.097.096.897.699.999.0
Percentage of Revenues us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mrk:Adempas, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value575611710710490919475687970678449484033
Percentage of Revenues0.50.51.00.90.90.80.80.90.70.70.80.70.70.90.50.50.40.4
Percentage of Revenues0.50.51.00.90.90.80.80.90.70.70.80.70.70.90.50.50.40.4
Percentage of Revenues us-gaap:OperatingSegments mrk:Adempas mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:AllianceRevenueAdempas, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value79535142
Percentage of Revenues0.70.40.40.4
Percentage of Revenues0.70.40.40.4
Percentage of Revenues us-gaap:OperatingSegments mrk:AllianceRevenueAdempas mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:AlliancerevenueLynparza, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value178145131123111796249443315500
Percentage of Revenues1.61.21.11.00.90.70.60.50.40.30.10.00.00.0
Percentage of Revenues1.61.21.11.00.90.70.60.50.40.30.10.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:AlliancerevenueLynparza mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
us-gaap:OperatingSegments, mrk:Arcoxia, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value65706772757586838483918089103108114117111110123115123119132
Percentage of Revenues0.60.60.60.60.60.70.80.80.80.80.90.80.91.11.11.11.21.21.11.21.21.31.11.3
Percentage of Revenues0.60.60.60.60.60.70.80.80.80.80.90.80.91.11.11.11.21.21.11.21.21.31.11.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Arcoxia mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Atozet, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value11512210897929489841017354596349503933
Percentage of Revenues1.11.00.90.80.80.90.80.81.00.70.50.60.60.50.50.40.3
Percentage of Revenues1.11.00.90.80.80.90.80.81.00.70.50.60.60.50.50.40.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Atozet mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Belsomra, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8479838076676966715460565242
Percentage of Revenues0.80.70.70.60.60.60.60.60.70.50.60.50.50.4
Percentage of Revenues0.80.70.70.60.60.60.60.60.70.50.60.50.50.4
Percentage of Revenues us-gaap:OperatingSegments mrk:Belsomra mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Bridion, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value22429931428427825525621724020420918516314813913911390918987859590
Percentage of Revenues2.12.52.62.32.42.42.32.02.32.02.01.81.61.61.41.31.11.00.90.90.90.90.90.9
Percentage of Revenues2.12.52.62.32.42.42.32.02.32.02.01.81.61.61.41.31.11.00.90.90.90.90.90.9
Percentage of Revenues us-gaap:OperatingSegments mrk:Bridion mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cancidas, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value435558626761697987919594112121152142131133137139134163176183
Percentage of Revenues0.40.50.50.50.60.60.60.70.80.90.90.91.11.31.51.31.31.41.31.41.41.71.71.7
Percentage of Revenues0.40.50.50.50.60.60.60.70.80.90.90.91.11.31.51.31.31.41.31.41.41.71.71.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Cancidas mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CompanionAnimals, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value453475345396453414352361457413313345373361
Percentage of Revenues4.23.92.93.23.93.83.23.34.44.13.03.33.83.8
Percentage of Revenues4.23.92.93.23.93.83.23.34.44.13.03.33.83.8
Percentage of Revenues us-gaap:OperatingSegments mrk:CompanionAnimals mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CozaarHyzaar, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value4971216587296105103125122124128119112122131132126143150189185192195
Percentage of Revenues0.50.61.80.50.60.91.01.01.21.21.21.21.21.21.21.21.31.41.41.51.92.01.81.8
Percentage of Revenues0.50.61.80.50.60.91.01.01.21.21.21.21.21.21.21.21.31.41.41.51.92.01.81.8
Percentage of Revenues us-gaap:OperatingSegments mrk:CozaarHyzaar mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cubicin, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3246505267888095949892911039611832035729232232529318777
Percentage of Revenues0.30.40.40.40.60.80.70.90.91.00.90.91.01.01.23.03.63.13.23.23.02.00.10.1
Percentage of Revenues0.30.40.40.40.60.80.70.90.91.00.90.91.01.01.23.03.63.13.23.23.02.00.10.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Cubicin mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Emend, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33435298121117126123148125143137143133144137143126139141134122151136
Percentage of Revenues0.30.40.40.81.01.11.11.11.41.21.41.31.41.41.41.31.51.41.41.41.41.31.41.3
Percentage of Revenues0.30.40.40.81.01.11.11.11.41.21.41.31.41.41.41.31.51.41.41.41.41.31.41.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Emend mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:FollistimAq, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value444159626357706070676672798187101739495951118210397
Percentage of Revenues0.40.30.50.50.50.50.60.60.70.70.60.70.80.90.91.00.71.00.90.91.10.91.00.9
Percentage of Revenues0.40.30.50.50.50.50.60.60.70.70.60.70.80.90.91.00.71.00.90.91.10.91.00.9
Percentage of Revenues us-gaap:OperatingSegments mrk:FollistimAq mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:GardasilGardasil9, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value656109769313208868388341048608660633675469532542860
Percentage of Revenues6.09.15.810.67.57.77.69.75.86.66.16.54.75.65.48.2
Percentage of Revenues6.09.15.810.67.57.77.69.75.86.66.16.54.75.65.48.2
Percentage of Revenues us-gaap:OperatingSegments mrk:GardasilGardasil9 mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ImplanonNexplanon, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value132195206199183199168186174174183155178170160148164134151176124137123158
Percentage of Revenues1.21.61.71.61.61.81.51.71.71.71.81.51.81.81.61.41.71.41.51.71.31.51.21.5
Percentage of Revenues1.21.61.71.61.61.81.51.71.71.71.81.51.81.81.61.41.71.41.51.71.31.51.21.5
Percentage of Revenues us-gaap:OperatingSegments mrk:ImplanonNexplanon mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Invanz, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value43645757787259137149151157159150136152152143114145153139132139141
Percentage of Revenues0.40.50.50.50.70.70.51.31.41.51.51.51.51.41.51.41.51.21.41.51.41.41.31.3
Percentage of Revenues0.40.50.50.50.70.70.51.31.41.51.51.51.51.41.51.41.51.21.41.51.41.41.31.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Invanz mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:IsentressIsentressHD, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value196245223250247255280275305281308310282305337372338
Percentage of Revenues1.82.01.92.02.12.42.52.52.92.83.03.02.83.23.33.53.4
Percentage of Revenues1.82.01.92.02.12.42.52.52.92.83.03.02.83.23.33.53.4
Percentage of Revenues us-gaap:OperatingSegments mrk:IsentressIsentressHD mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Janumet, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value490503474503533530535563585544586513563496577548569506526562554509571505
Percentage of Revenues4.54.24.04.14.54.94.95.25.65.45.65.05.75.35.75.25.85.45.15.65.75.45.44.8
Percentage of Revenues4.54.24.04.14.54.94.95.25.65.45.65.05.75.35.75.25.85.45.15.65.75.45.44.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Janumet mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Januvia, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value854774943807908824930927949880938101294883993210061064906921101410448841082933
Percentage of Revenues7.96.47.96.57.77.68.58.69.18.89.09.89.58.99.29.510.89.79.010.110.79.410.38.8
Percentage of Revenues7.96.47.96.57.77.68.58.69.18.89.09.89.58.99.29.510.89.79.010.110.79.410.38.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Januvia mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Keytruda, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33883284311130702634226921511889166714641297104788158448335631424921415911083514
Percentage of Revenues31.227.226.224.822.421.019.617.515.914.612.410.18.96.24.83.43.22.72.11.61.10.90.50.0
Percentage of Revenues31.227.226.224.822.421.019.617.515.914.612.410.18.96.24.83.43.22.72.11.61.10.90.50.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Keytruda mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Lenvima, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value15112812410997747143350000
Percentage of Revenues1.41.11.00.90.80.70.60.40.30.00.00.00.0
Percentage of Revenues1.41.11.00.90.80.70.60.40.30.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Lenvima mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
us-gaap:OperatingSegments, mrk:Livestock, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value648739777726671611684660633652668655582578
Percentage of Revenues6.06.16.55.95.75.66.26.16.06.56.46.35.96.1
Percentage of Revenues6.06.16.55.95.75.66.26.16.06.56.46.35.96.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Livestock mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nasonex, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value98102-361161091031027181120121428513911294101229233121215289269261
Percentage of Revenues0.90.8-0.30.90.91.00.90.70.81.21.20.40.91.51.10.91.02.52.31.22.23.12.62.5
Percentage of Revenues0.90.8-0.30.90.91.00.90.70.81.21.20.40.91.51.10.91.02.52.31.22.23.12.62.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Nasonex mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Noxafil, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value7394102177193190191188188176178162155141161147143145127132117111122107
Percentage of Revenues0.70.80.91.41.61.81.71.71.81.81.71.61.61.51.61.41.51.61.21.31.21.21.21.0
Percentage of Revenues0.70.80.91.41.61.81.71.71.81.81.71.61.61.51.61.41.51.61.21.31.21.21.21.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Noxafil mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nuvaring, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value6363179241240219216234236216188214199160206195200175194190182166192186
Percentage of Revenues0.60.51.51.92.02.02.02.22.32.21.82.12.01.72.01.92.01.91.91.91.91.81.81.8
Percentage of Revenues0.60.51.51.92.02.02.02.22.32.21.82.12.01.72.01.92.01.91.91.91.91.81.81.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Nuvaring mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:OtherPharmaceutical, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11031194126712291268114010679801053118610489521064
Percentage of Revenues10.19.910.79.910.810.59.79.110.111.810.09.210.7
Percentage of Revenues10.19.910.79.910.810.59.79.110.111.810.09.210.7
Percentage of Revenues us-gaap:OperatingSegments mrk:OtherPharmaceutical mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Pneumovax23, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value117256334237170185321214193179263229166163238175120107188138106110346197
Percentage of Revenues1.12.12.81.91.41.72.92.01.81.82.52.21.71.72.41.71.21.11.81.41.11.23.31.9
Percentage of Revenues1.12.12.81.91.41.72.92.01.81.82.52.21.71.72.41.71.21.11.81.41.11.23.31.9
Percentage of Revenues us-gaap:OperatingSegments mrk:Pneumovax23 mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Prevymis, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value63603832
Percentage of Revenues0.60.50.30.3
Percentage of Revenues0.60.50.30.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Prevymis mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Primaxin, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value645166777159537268727473716266778173857588658691
Percentage of Revenues0.60.40.60.60.60.50.50.70.60.70.70.70.70.70.70.70.80.80.80.70.90.70.80.9
Percentage of Revenues0.60.40.60.60.60.50.50.70.60.70.70.70.70.70.70.70.80.80.80.70.90.70.80.9
Percentage of Revenues us-gaap:OperatingSegments mrk:Primaxin mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ProQuadMMRIIVarivax, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value378435481623675496455525426392403519399355404496383357409390358348367421
Percentage of Revenues3.53.64.15.05.74.64.14.94.13.93.95.04.03.84.04.73.93.84.03.93.73.73.54.0
Percentage of Revenues3.53.64.15.05.74.64.14.94.13.93.95.04.03.84.04.73.93.84.03.93.73.73.54.0
Percentage of Revenues us-gaap:OperatingSegments mrk:ProQuadMMRIIVarivax mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Remicade, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value73888910198123123135157167186214208229269311339349396442455501557604
Percentage of Revenues0.70.70.70.80.81.11.11.31.51.71.82.12.12.42.73.03.43.73.94.44.65.35.35.7
Percentage of Revenues0.70.70.70.80.81.11.11.31.51.71.82.12.12.42.73.03.43.73.94.44.65.35.35.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Remicade mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Rotateq, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value16822222718017221118819115619316117912322416317113018816916089192169174
Percentage of Revenues1.51.81.91.51.52.01.71.81.51.91.51.71.22.41.61.61.32.01.71.60.92.01.61.6
Percentage of Revenues1.51.81.91.51.52.01.71.81.51.91.51.71.22.41.61.61.32.01.71.60.92.01.61.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Rotateq mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Simponi, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value191215205203214208220210233231217219199184185193199188185178169158189170
Percentage of Revenues1.81.81.71.61.81.92.01.92.22.32.12.12.02.01.81.82.02.01.81.81.71.71.81.6
Percentage of Revenues1.81.81.71.61.81.92.01.92.22.32.12.12.02.01.81.82.02.01.81.81.71.71.81.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Simponi mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Singulair, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value100155195152160191187161185175182161203186210239229237273201212245319218
Percentage of Revenues0.91.31.61.21.41.81.71.51.81.71.71.62.02.02.12.32.32.52.72.02.22.63.02.1
Percentage of Revenues0.91.31.61.21.41.81.71.51.81.71.71.62.02.02.12.32.32.52.72.02.22.63.02.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Singulair mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vaqta, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28607162584772666537
Percentage of Revenues0.30.50.60.50.50.40.70.60.60.4
Percentage of Revenues0.30.50.60.50.50.40.70.60.60.4
Percentage of Revenues us-gaap:OperatingSegments mrk:Vaqta mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vytorin, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3953545776978392155167186142182241298273293277309302320320370369
Percentage of Revenues0.40.40.50.50.60.90.80.91.51.71.81.41.82.62.92.63.03.03.03.03.33.43.53.5
Percentage of Revenues0.40.40.50.50.60.90.80.91.51.71.81.41.82.62.92.63.03.03.03.03.33.43.53.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Vytorin mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zepatier, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value39556683108114108104113131297468517378229164112500000
Percentage of Revenues0.40.50.60.70.91.11.01.01.11.32.84.55.24.02.31.61.10.50.00.00.00.0
Percentage of Revenues0.40.50.60.70.91.11.01.01.11.32.84.55.24.02.31.61.10.50.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Zepatier mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
us-gaap:OperatingSegments, mrk:Zerbaxa, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value32372726
Percentage of Revenues0.30.30.20.2
Percentage of Revenues0.30.30.20.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Zerbaxa mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zetia, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value137145147147156140161165226305323320367334575671702612690633635568662660
Percentage of Revenues1.31.21.21.21.31.31.51.52.23.03.13.13.73.55.76.47.16.66.86.36.56.06.36.3
Percentage of Revenues1.31.21.21.21.31.31.51.52.23.03.13.13.73.55.76.47.16.66.86.36.56.06.36.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Zetia mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mrk:Adempas, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value57561171071049091947568797067
Percentage of Revenues0.50.51.00.90.90.80.80.90.70.70.80.70.7
Percentage of Revenues0.50.51.00.90.90.80.80.90.70.70.80.70.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Adempas mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:AllianceRevenueAdempas, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value73494940
Percentage of Revenues0.70.40.40.4
Percentage of Revenues0.70.40.40.4
Percentage of Revenues us-gaap:OperatingSegments mrk:AllianceRevenueAdempas country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:AllianceRevenueAdempas, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value6522
Percentage of Revenues0.10.00.00.0
Percentage of Revenues0.10.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:AllianceRevenueAdempas mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:AlliancerevenueLynparza, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value105858371665039333124000
Percentage of Revenues1.00.70.70.60.60.50.40.30.30.20.00.00.0
Percentage of Revenues1.00.70.70.60.60.50.40.30.30.20.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:AlliancerevenueLynparza country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
us-gaap:OperatingSegments, mrk:AlliancerevenueLynparza, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value73605053452924151391550
Percentage of Revenues0.70.50.40.40.40.30.20.10.10.10.10.00.0
Percentage of Revenues0.70.50.40.40.40.30.20.10.10.10.10.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:AlliancerevenueLynparza mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
us-gaap:OperatingSegments, mrk:Arcoxia, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value65706772757586838483918089
Percentage of Revenues0.60.60.60.60.60.70.80.80.80.80.90.80.9
Percentage of Revenues0.60.60.60.60.60.70.80.80.80.80.90.80.9
Percentage of Revenues us-gaap:OperatingSegments mrk:Arcoxia mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Atozet, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value115122108979294898410173545963
Percentage of Revenues1.11.00.90.80.80.90.80.81.00.70.50.60.6
Percentage of Revenues1.11.00.90.80.80.90.80.81.00.70.50.60.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Atozet mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Belsomra, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value22272423212420232923262725
Percentage of Revenues0.20.20.20.20.20.20.20.20.30.20.20.30.3
Percentage of Revenues0.20.20.20.20.20.20.20.20.30.20.20.30.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Belsomra country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Belsomra, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value61535957554449434231343028
Percentage of Revenues0.60.40.50.50.50.40.40.40.40.30.30.30.3
Percentage of Revenues0.60.40.50.50.50.40.40.40.40.30.30.30.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Belsomra mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Bridion, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value107143152133129119114969580776354
Percentage of Revenues1.01.21.31.11.11.11.00.90.90.80.70.60.5
Percentage of Revenues1.01.21.31.11.11.11.00.90.90.80.70.60.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Bridion country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Bridion, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value117157161151149136142120145124132122109
Percentage of Revenues1.11.31.41.21.31.31.31.11.41.21.31.21.1
Percentage of Revenues1.11.31.41.21.31.31.31.11.41.21.31.21.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Bridion mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cancidas, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2310312243366
Percentage of Revenues-0.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Revenues-0.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Cancidas country:US mrk:Pharmaceuticalsegment100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cancidas, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value455255626460677783889288106
Percentage of Revenues0.40.40.50.50.50.60.60.70.80.90.90.91.1
Percentage of Revenues0.40.40.50.50.50.60.60.70.80.90.90.91.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Cancidas mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CompanionAnimals, country:US, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value220222164193190177169153204183136153167
Percentage of Revenues2.01.81.41.61.61.61.51.41.91.81.31.51.7
Percentage of Revenues2.01.81.41.61.61.61.51.41.91.81.31.51.7
Percentage of Revenues us-gaap:OperatingSegments mrk:CompanionAnimals country:US mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CompanionAnimals, mrk:International, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value233253181203263237183207253229177192206
Percentage of Revenues2.12.11.51.62.22.21.71.92.42.31.71.92.1
Percentage of Revenues2.12.11.51.62.22.21.71.92.42.31.71.92.1
Percentage of Revenues us-gaap:OperatingSegments mrk:CompanionAnimals mrk:International mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CozaarHyzaar, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value46224-1-15471393
Percentage of Revenues0.00.00.20.0-0.0-0.00.00.00.10.00.00.10.0
Percentage of Revenues0.00.00.20.0-0.0-0.00.00.00.10.00.00.10.0
Percentage of Revenues us-gaap:OperatingSegments mrk:CozaarHyzaar country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:CozaarHyzaar, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value456519455739710199118121121119116
Percentage of Revenues0.40.51.60.40.60.90.90.91.11.21.21.21.2
Percentage of Revenues0.40.51.60.40.60.90.90.91.11.21.21.21.2
Percentage of Revenues us-gaap:OperatingSegments mrk:CozaarHyzaar mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cubicin, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10151414224241554847414153
Percentage of Revenues0.10.10.10.10.20.40.40.50.50.50.40.40.5
Percentage of Revenues0.10.10.10.10.20.40.40.50.50.50.40.40.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Cubicin country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Cubicin, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value21313638454639404651525050
Percentage of Revenues0.20.30.30.30.40.40.40.40.40.50.50.50.5
Percentage of Revenues0.20.30.30.30.40.40.40.40.40.50.50.50.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Cubicin mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Emend, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value651042676373718979858883
Percentage of Revenues0.10.00.10.30.60.60.70.70.90.80.80.90.8
Percentage of Revenues0.10.00.10.30.60.60.70.70.90.80.80.90.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Emend country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Emend, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value27384256545353525946574960
Percentage of Revenues0.20.30.40.50.50.50.50.50.60.50.50.50.6
Percentage of Revenues0.20.30.40.50.50.50.50.50.60.50.50.50.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Emend mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:FollistimAq, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value20212327242932262729193032
Percentage of Revenues0.20.20.20.20.20.30.30.20.30.30.20.30.3
Percentage of Revenues0.20.20.20.20.20.30.30.20.30.30.20.30.3
Percentage of Revenues us-gaap:OperatingSegments mrk:FollistimAq country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:FollistimAq, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value24213635392838344339464147
Percentage of Revenues0.20.20.30.30.30.30.30.30.40.40.40.40.5
Percentage of Revenues0.20.20.30.30.30.30.30.30.40.40.40.40.5
Percentage of Revenues us-gaap:OperatingSegments mrk:FollistimAq mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:GardasilGardasil9, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value168461252761456362451740302380370484312
Percentage of Revenues1.53.82.16.13.93.34.16.92.93.83.54.73.1
Percentage of Revenues1.53.82.16.13.93.34.16.92.93.83.54.73.1
Percentage of Revenues us-gaap:OperatingSegments mrk:GardasilGardasil9 country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:GardasilGardasil9, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value488636441558430476385308306280262191156
Percentage of Revenues4.55.33.74.53.74.43.52.92.92.82.51.81.6
Percentage of Revenues4.55.33.74.53.74.43.52.92.92.82.51.81.6
Percentage of Revenues us-gaap:OperatingSegments mrk:GardasilGardasil9 mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ImplanonNexplanon, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value87149147136136149120133114128129110125
Percentage of Revenues0.81.21.21.11.21.41.11.21.11.31.21.11.3
Percentage of Revenues0.81.21.21.11.21.41.11.21.11.31.21.11.3
Percentage of Revenues us-gaap:OperatingSegments mrk:ImplanonNexplanon country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ImplanonNexplanon, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value44455962485048536046544553
Percentage of Revenues0.40.40.50.50.40.50.40.50.60.50.50.40.5
Percentage of Revenues0.40.40.50.50.40.50.40.50.60.50.50.40.5
Percentage of Revenues us-gaap:OperatingSegments mrk:ImplanonNexplanon mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Invanz, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value060-118141748791939393
Percentage of Revenues0.00.00.0-0.00.20.10.00.70.80.90.90.90.9
Percentage of Revenues0.00.00.0-0.00.20.10.00.70.80.90.90.90.9
Percentage of Revenues us-gaap:OperatingSegments mrk:Invanz country:US mrk:Pharmaceuticalsegment0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Invanz, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value43595758605858626360646657
Percentage of Revenues0.40.50.50.50.50.50.50.60.60.60.60.60.6
Percentage of Revenues0.40.50.50.50.50.50.50.60.60.60.60.60.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Invanz mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:IsentressIsentressHD, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value76759410294108130123132128143143136
Percentage of Revenues0.70.60.80.80.81.01.21.11.31.31.41.41.4
Percentage of Revenues0.70.60.80.80.81.01.21.11.31.31.41.41.4
Percentage of Revenues us-gaap:OperatingSegments mrk:IsentressIsentressHD country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:IsentressIsentressHD, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value120170127149153147150151174152165167146
Percentage of Revenues1.11.41.11.21.31.41.41.41.71.51.61.61.5
Percentage of Revenues1.11.41.11.21.31.41.41.41.71.51.61.61.5
Percentage of Revenues us-gaap:OperatingSegments mrk:IsentressIsentressHD mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Janumet, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value143113127129166167186225209192223197248
Percentage of Revenues1.30.91.11.01.41.51.72.12.01.92.11.92.5
Percentage of Revenues1.30.91.11.01.41.51.72.12.01.92.11.92.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Janumet country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Janumet, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value348390347375366364350339377352363316315
Percentage of Revenues3.23.22.93.03.13.43.23.13.63.53.53.13.2
Percentage of Revenues3.23.22.93.03.13.43.23.13.63.53.53.13.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Janumet mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Januvia, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value413355501367471384503498503465507598541
Percentage of Revenues3.82.94.23.04.03.64.64.64.84.64.95.85.4
Percentage of Revenues3.82.94.23.04.03.64.64.64.84.64.95.85.4
Percentage of Revenues us-gaap:OperatingSegments mrk:Januvia country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Januvia, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value441419441440437440427429446416431414407
Percentage of Revenues4.13.53.73.53.74.13.94.04.34.14.14.04.1
Percentage of Revenues4.13.53.73.53.74.13.94.04.34.14.14.04.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Januvia mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Keytruda, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value20431906178017431498128412441109959838787604556
Percentage of Revenues18.815.815.014.112.711.911.310.39.28.37.55.85.6
Percentage of Revenues18.815.815.014.112.711.911.310.39.28.37.55.85.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Keytruda country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Keytruda, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13451378133113271136985907780707626510442325
Percentage of Revenues12.411.411.210.79.79.18.27.26.86.24.94.33.3
Percentage of Revenues12.411.411.210.79.79.18.27.26.86.24.94.33.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Keytruda mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Lenvima, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value989070655450463000000
Percentage of Revenues0.90.70.60.50.50.50.40.30.00.00.00.00.0
Percentage of Revenues0.90.70.60.50.50.50.40.30.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Lenvima country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0
us-gaap:OperatingSegments, mrk:Lenvima, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5338534443242513350000
Percentage of Revenues0.50.30.40.40.40.20.20.10.30.00.00.00.0
Percentage of Revenues0.50.30.40.40.40.20.20.10.30.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Lenvima mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
us-gaap:OperatingSegments, mrk:Livestock, country:US, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value122162176144145117145153107124112137103
Percentage of Revenues1.11.31.51.21.21.11.31.41.01.21.11.31.0
Percentage of Revenues1.11.31.51.21.21.11.31.41.01.21.11.31.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Livestock country:US mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Livestock, mrk:International, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value526577600582526494539508526529556518479
Percentage of Revenues4.84.85.14.74.54.64.94.75.05.35.35.04.8
Percentage of Revenues4.84.85.14.74.54.64.94.75.05.35.35.04.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Livestock mrk:International mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nasonex, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value47-76641570738-2321
Percentage of Revenues0.00.1-0.10.00.10.00.10.10.00.10.4-0.20.2
Percentage of Revenues0.00.1-0.10.00.10.00.10.10.00.10.4-0.20.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Nasonex country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nasonex, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9495-2911010399876481113836564
Percentage of Revenues0.90.8-0.20.90.90.90.80.60.81.10.80.60.6
Percentage of Revenues0.90.8-0.20.90.90.90.80.60.81.10.80.60.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Nasonex mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Noxafil, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6814771009196898781897877
Percentage of Revenues0.10.10.10.60.90.80.90.80.80.80.90.80.8
Percentage of Revenues0.10.10.10.60.90.80.90.80.80.80.90.80.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Noxafil country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Noxafil, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6787891009399959910094908378
Percentage of Revenues0.60.70.70.80.80.90.90.91.00.90.90.80.8
Percentage of Revenues0.60.70.70.80.80.90.90.91.00.90.90.80.8
Percentage of Revenues us-gaap:OperatingSegments mrk:Noxafil mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nuvaring, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3526149202206185172193187171139160153
Percentage of Revenues0.30.21.31.61.81.71.61.81.81.71.31.51.5
Percentage of Revenues0.30.21.31.61.81.71.61.81.81.71.31.51.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Nuvaring country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Nuvaring, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value28372939343445414946495447
Percentage of Revenues0.30.30.20.30.30.30.40.40.50.50.50.50.5
Percentage of Revenues0.30.30.20.30.30.30.40.40.50.50.50.50.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Nuvaring mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:OtherPharmaceutical, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value385409421385401358351317289320272266304
Percentage of Revenues3.53.43.53.13.43.33.22.92.83.22.62.63.1
Percentage of Revenues3.53.43.53.13.43.33.22.92.83.22.62.63.1
Percentage of Revenues us-gaap:OperatingSegments mrk:OtherPharmaceutical country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:OtherPharmaceutical, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value720780851842869782705666765867777688761
Percentage of Revenues6.66.57.26.87.47.26.46.27.38.67.46.77.7
Percentage of Revenues6.66.57.26.87.47.26.46.27.38.67.46.77.7
Percentage of Revenues us-gaap:OperatingSegments mrk:OtherPharmaceutical mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Pneumovax23, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value21182251179123125233160122112189174104
Percentage of Revenues0.21.52.11.41.01.22.11.51.21.11.81.71.0
Percentage of Revenues0.21.52.11.41.01.22.11.51.21.11.81.71.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Pneumovax23 country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Pneumovax23, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value96758358475989547166745661
Percentage of Revenues0.90.60.70.50.40.50.80.50.70.70.70.50.6
Percentage of Revenues0.90.60.70.50.40.50.80.50.70.70.70.50.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Pneumovax23 mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Prevymis, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value28261918
Percentage of Revenues0.30.20.20.2
Percentage of Revenues0.30.20.20.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Prevymis country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Prevymis, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value35331814
Percentage of Revenues0.30.30.20.1
Percentage of Revenues0.30.30.20.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Prevymis mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Primaxin, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1002001105351
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Primaxin country:US mrk:Pharmaceuticalsegment100.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Primaxin, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value63516775705952716867716870
Percentage of Revenues0.60.40.60.60.60.50.50.70.60.70.70.70.7
Percentage of Revenues0.60.40.60.60.60.50.50.70.60.70.70.70.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Primaxin mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ProQuadMMRIIVarivax, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value263333358482500343333429356312316419341
Percentage of Revenues2.42.83.03.94.33.23.04.03.43.13.04.13.4
Percentage of Revenues2.42.83.03.94.33.23.04.03.43.13.04.13.4
Percentage of Revenues us-gaap:OperatingSegments mrk:ProQuadMMRIIVarivax country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:ProQuadMMRIIVarivax, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1151021231411741531229670808810058
Percentage of Revenues1.10.81.01.11.51.41.10.90.70.80.81.00.6
Percentage of Revenues1.10.81.01.11.51.41.10.90.70.80.81.00.6
Percentage of Revenues us-gaap:OperatingSegments mrk:ProQuadMMRIIVarivax mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Remicade, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value73888910198123123135157167186214208
Percentage of Revenues0.70.70.70.80.81.11.11.31.51.71.82.12.1
Percentage of Revenues0.70.70.70.80.81.11.11.31.51.71.82.12.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Remicade mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Rotateq, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1001401461021041541121349915110412772
Percentage of Revenues0.91.21.20.80.91.41.01.20.91.51.01.20.7
Percentage of Revenues0.91.21.20.80.91.41.01.20.91.51.01.20.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Rotateq country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Rotateq, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value68828178685776575742565251
Percentage of Revenues0.60.70.70.60.60.50.70.50.50.40.50.50.5
Percentage of Revenues0.60.70.70.60.60.50.70.50.50.40.50.50.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Rotateq mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Simponi, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value191215205203214208220210233231217219199
Percentage of Revenues1.81.81.71.61.81.92.01.92.22.32.12.12.0
Percentage of Revenues1.81.81.71.61.81.92.01.92.22.32.12.12.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Simponi mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Singulair, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4551185455612166
Percentage of Revenues0.00.00.00.10.10.00.00.00.00.10.10.20.1
Percentage of Revenues0.00.00.00.10.10.00.00.00.00.10.10.20.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Singulair country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Singulair, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value96151190140153186183156180170170145197
Percentage of Revenues0.91.31.61.11.31.71.71.41.71.71.61.42.0
Percentage of Revenues0.91.31.61.11.31.71.71.41.71.71.61.42.0
Percentage of Revenues us-gaap:OperatingSegments mrk:Singulair mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vaqta, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17302736382932364218
Percentage of Revenues0.20.20.20.30.30.30.30.30.40.2
Percentage of Revenues0.20.20.20.30.30.30.30.30.40.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Vaqta country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vaqta, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11304326201840302318
Percentage of Revenues0.10.20.40.20.20.20.40.30.20.2
Percentage of Revenues0.10.20.40.20.20.20.40.30.20.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Vaqta mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vytorin, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value235533-103810-630
Percentage of Revenues0.00.00.00.00.00.0-0.00.00.00.10.1-0.10.3
Percentage of Revenues0.00.00.00.00.00.0-0.00.00.00.10.1-0.10.3
Percentage of Revenues us-gaap:OperatingSegments mrk:Vytorin country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Vytorin, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3750505273948592152158176148152
Percentage of Revenues0.30.40.40.40.60.90.80.91.51.61.71.41.5
Percentage of Revenues0.30.40.40.40.60.90.80.91.51.61.71.41.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Vytorin mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zepatier, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value151822243933018-10088228256
Percentage of Revenues0.10.10.20.20.30.30.00.2-0.10.00.82.22.6
Percentage of Revenues0.10.10.20.20.30.30.00.2-0.10.00.82.22.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Zepatier country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zepatier, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value24374459688110886123131208241261
Percentage of Revenues0.20.30.40.50.60.71.00.81.21.32.02.32.6
Percentage of Revenues0.20.30.40.50.60.71.00.81.21.32.02.32.6
Percentage of Revenues us-gaap:OperatingSegments mrk:Zepatier mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zerbaxa, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value17201312
Percentage of Revenues0.20.20.10.1
Percentage of Revenues0.20.20.10.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Zerbaxa country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zerbaxa, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-06-302019-03-31
Value15161414
Percentage of Revenues0.10.10.10.1
Percentage of Revenues0.10.10.10.1
Percentage of Revenues us-gaap:OperatingSegments mrk:Zerbaxa mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zetia, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1-235601198175465122
Percentage of Revenues-0.0-0.00.00.00.10.00.10.10.10.20.50.61.2
Percentage of Revenues-0.0-0.00.00.00.10.00.10.10.10.20.50.61.2
Percentage of Revenues us-gaap:OperatingSegments mrk:Zetia country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Zetia, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value138147143142150140151157218287269255246
Percentage of Revenues1.31.21.21.11.31.31.41.52.12.92.62.52.5
Percentage of Revenues1.31.21.21.11.31.31.41.52.12.92.62.52.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Zetia mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value11011214112211221124102510361021109010659811000955939
Percentage of Revenues10.110.19.59.19.69.59.49.510.410.69.49.79.610.0
Percentage of Revenues10.110.19.59.19.69.59.49.510.410.69.49.79.610.0
Percentage of Revenues us-gaap:OperatingSegments mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9679106551053311095104609663983096589282891992899156875981858904944387008104902789258564826693709134
Percentage of Revenues89.088.488.889.588.989.389.489.588.788.989.088.788.286.888.089.688.487.088.488.687.587.789.486.5
Percentage of Revenues89.088.488.889.588.989.389.489.588.788.989.088.788.286.888.089.688.487.088.488.687.587.789.486.5
Percentage of Revenues us-gaap:OperatingSegments mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value02342464839555556841031001011033-2477977979905108184691192911011321
Percentage of Revenues0.00.20.40.40.40.40.50.50.50.81.01.01.010.9-24.59.39.99.710.68.49.39.910.512.5
Percentage of Revenues0.00.20.40.40.40.40.50.50.50.81.01.01.010.9-24.59.39.99.710.68.49.39.910.512.5
Percentage of Revenues us-gaap:OperatingSegments us-gaap:AllOtherSegments0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementGeographical

us-gaap:CorporateNonSegment, country:US


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value221667104717205426117857
Percentage of Revenues0.20.10.60.10.00.10.20.20.50.30.10.10.10.6
Percentage of Revenues0.20.10.60.10.00.10.20.20.50.30.10.10.10.6
Percentage of Revenues us-gaap:CorporateNonSegment country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:CorporateNonSegment, mrk:International


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value70149106125125826139-18-564963108159
Percentage of Revenues0.61.20.91.01.10.80.60.4-0.2-0.60.50.61.11.7
Percentage of Revenues0.61.20.91.01.10.80.60.4-0.2-0.60.50.61.11.7
Percentage of Revenues us-gaap:CorporateNonSegment mrk:International100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, country:US


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value46125121507555155140450847705010418941074317458743004138
Percentage of Revenues42.442.542.844.543.741.743.446.440.040.941.444.443.343.9
Percentage of Revenues42.442.542.844.543.741.743.446.440.040.941.444.443.343.9
Percentage of Revenues us-gaap:OperatingSegments country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:International


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value61686771662067476491621961515725624059606056566955155080
Percentage of Revenues56.756.255.854.455.257.555.953.059.659.458.054.955.553.8
Percentage of Revenues56.756.255.854.455.257.555.953.059.659.458.054.955.553.8
Percentage of Revenues us-gaap:OperatingSegments mrk:International100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, country:US, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value342384340337335294314306311307248290270
Percentage of Revenues3.13.22.92.72.82.72.92.83.03.12.42.82.7
Percentage of Revenues3.13.22.92.72.82.72.92.83.03.12.42.82.7
Percentage of Revenues us-gaap:OperatingSegments country:US mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, country:US, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4270471446945132475841754402464938223716396741973929
Percentage of Revenues39.339.139.641.440.538.640.043.136.537.038.040.639.6
Percentage of Revenues39.339.139.641.440.538.640.043.136.537.038.040.639.6
Percentage of Revenues us-gaap:OperatingSegments country:US mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, country:US, us-gaap:AllOtherSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0234146473954555684102100101
Percentage of Revenues0.00.20.30.40.40.40.50.50.50.81.01.01.0
Percentage of Revenues0.00.20.30.40.40.40.50.50.50.81.01.01.0
Percentage of Revenues us-gaap:OperatingSegments country:US us-gaap:AllOtherSegments0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:International, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value759830781785789731722715779758733710685
Percentage of Revenues7.06.96.66.36.76.86.66.67.47.67.06.96.9
Percentage of Revenues7.06.96.66.36.76.86.66.67.47.67.06.96.9
Percentage of Revenues us-gaap:OperatingSegments mrk:International mrk:AnimalHealthsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:International, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5409594158395962570254885428501054615202532249594830
Percentage of Revenues49.849.349.248.148.550.749.446.452.251.851.048.048.6
Percentage of Revenues49.849.349.248.148.550.749.446.452.251.851.048.048.6
Percentage of Revenues us-gaap:OperatingSegments mrk:International mrk:Pharmaceuticalsegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:OperatingSegments, mrk:International, us-gaap:AllOtherSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0000001000100
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mrk:International us-gaap:AllOtherSegments0.00.00.00.00.00.0100.00.00.00.0100.00.00.0

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:AstraZeneca, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-03-312019-03-31
Value14579
Percentage of Revenues1.20.7
Percentage of Revenues1.20.7
Percentage of Revenues mrk:AstraZeneca us-gaap:Sales us-gaap:CollaborativeArrangement100.0100.0
mrk:BayerAG, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value13610910490
Percentage of Revenues1.30.90.90.8
Percentage of Revenues1.30.90.90.8
Percentage of Revenues mrk:BayerAG us-gaap:Sales us-gaap:CollaborativeArrangement100.0100.0100.0100.0
mrk:Eisai, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-03-312019-03-31
Value12874
Percentage of Revenues1.10.7
Percentage of Revenues1.10.7
Percentage of Revenues mrk:Eisai us-gaap:Sales us-gaap:CollaborativeArrangement100.0100.0

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

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value42466670754412-6-73-93-191349
Percentage of Revenues0.40.40.60.60.60.40.1-0.1-0.7-0.9-0.20.10.5
Percentage of Revenues0.40.40.60.60.60.40.1-0.1-0.7-0.9-0.20.10.5
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

country:CN


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value834864784914763746628512559486
Percentage of Revenues7.77.26.67.46.56.95.74.75.34.8
Percentage of Revenues7.77.26.67.46.56.95.74.75.34.8
Percentage of Revenues country:CN100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
country:JP


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value867811944919921799859761855737802775839705
Percentage of Revenues8.06.78.07.47.87.47.87.18.27.37.77.58.47.5
Percentage of Revenues8.06.78.07.47.87.47.87.18.27.37.77.58.47.5
Percentage of Revenues country:JP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
country:US


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value46345137514255255144451547875030424341334328459443084195
Percentage of Revenues42.642.643.344.643.741.743.546.640.541.241.544.543.444.5
Percentage of Revenues42.642.643.344.643.741.743.546.640.541.241.544.543.444.5
Percentage of Revenues country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
mrk:International


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value62386920672668726616630162125764622259046105573256235239
Percentage of Revenues57.457.456.755.456.358.356.553.459.558.858.555.556.655.5
Percentage of Revenues57.457.456.755.456.358.356.553.459.558.858.555.556.655.5
Percentage of Revenues mrk:International100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
mrk:OtherCountries


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value290427437423395347363319279206341318340419
Percentage of Revenues2.73.53.73.43.43.23.33.02.72.13.33.13.44.4
Percentage of Revenues2.73.53.73.43.43.23.33.02.72.13.33.13.44.4
Percentage of Revenues mrk:OtherCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
srt:AsiaPacific


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value666728726756716745-85711781350752-41311121056
Percentage of Revenues6.16.06.16.16.16.9-7.810.912.97.5-4.010.810.6
Percentage of Revenues6.16.06.16.16.16.9-7.810.912.97.5-4.010.810.6
Percentage of Revenues srt:AsiaPacific100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
srt:LatinAmerica


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value510556580671658561667622594532685585583
Percentage of Revenues4.74.64.95.45.65.26.15.85.75.36.65.75.9
Percentage of Revenues4.74.64.95.45.65.26.15.85.75.36.65.75.9
Percentage of Revenues srt:LatinAmerica100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:EMEA


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value30713534325531893163310329952884314431913104294128042629
Percentage of Revenues28.229.327.425.726.928.727.226.730.031.829.828.528.227.9
Percentage of Revenues28.229.327.425.726.928.727.226.730.031.829.828.528.227.9
Percentage of Revenues us-gaap:EMEA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:CostOfGoodsAndServicesSold



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3159331236693990340130523289361934173184344033073116
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues29.127.530.932.228.928.229.933.532.731.733.032.031.4

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:AstraZeneca, us-gaap:CostOfSales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value137287319
Percentage of CostOfGoodsAndServicesSold4.30.82.10.6
Percentage of Revenues1.30.20.60.2
Percentage of Revenues mrk:AstraZeneca us-gaap:CostOfSales us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:BayerAG, us-gaap:CostOfSales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value28282929
Percentage of CostOfGoodsAndServicesSold0.90.80.91.0
Percentage of Revenues0.30.20.20.3
Percentage of Revenues mrk:BayerAG us-gaap:CostOfSales us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:Eisai, us-gaap:CostOfSales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value135352351
Percentage of CostOfGoodsAndServicesSold4.31.10.71.7
Percentage of Revenues1.20.30.20.5
Percentage of Revenues mrk:Eisai us-gaap:CostOfSales us-gaap:CollaborativeArrangement0.00.00.00.0

Cost Of Goods And Services Sold

us-gaap:ResearchAndDevelopmentExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21232209254832042189193122142068227431962281438317491796464916642151165917981500167017372283165916641574166021011907222419182165186224191954193621584439232221792051
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.518.321.525.818.617.920.119.221.731.821.942.517.619.046.015.821.917.817.614.917.118.421.815.715.215.315.019.117.918.916.717.615.919.716.315.918.636.720.919.218.0

us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value199420972454311020931843197518552041298244001829152715994433144418331373156112911460156118391332
Percentage of ResearchAndDevelopmentExpense93.994.996.397.195.695.489.289.789.893.3192.941.787.389.095.486.885.282.886.886.187.489.980.680.3
Percentage of Revenues18.317.420.725.117.817.018.017.219.529.742.217.715.416.943.813.718.614.715.312.814.916.617.512.6
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:AstraZeneca, us-gaap:ResearchAndDevelopmentExpense, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value37363345
Percentage of ResearchAndDevelopmentExpense1.71.61.52.3
Percentage of Revenues0.30.30.30.4
Percentage of Revenues mrk:AstraZeneca us-gaap:ResearchAndDevelopmentExpense us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:BayerAG, us-gaap:ResearchAndDevelopmentExpense, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value16253230
Percentage of ResearchAndDevelopmentExpense0.81.11.51.6
Percentage of Revenues0.10.20.30.3
Percentage of Revenues mrk:BayerAG us-gaap:ResearchAndDevelopmentExpense us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:Eisai, us-gaap:ResearchAndDevelopmentExpense, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value56646247
Percentage of ResearchAndDevelopmentExpense2.62.92.82.4
Percentage of Revenues0.50.50.50.4
Percentage of Revenues mrk:Eisai us-gaap:ResearchAndDevelopmentExpense us-gaap:CollaborativeArrangement0.00.00.00.0

Research And Development Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value23782555288925892712242526432443250825082579240124382411259323932458231826152472262426012925297529732734280331402987339030633249307437043340352531643656319231753222
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues21.921.224.320.923.122.424.022.624.025.024.723.324.625.625.622.725.024.925.624.526.827.627.928.227.226.625.428.528.028.926.726.426.230.127.829.027.330.228.728.028.2

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:AstraZeneca, us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value39333327
Percentage of SellingGeneralAndAdministrativeExpense1.61.31.21.1
Percentage of Revenues0.40.30.30.2
Percentage of Revenues mrk:AstraZeneca us-gaap:SellingGeneralAndAdministrativeExpenses us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:BayerAG, us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value1715118
Percentage of SellingGeneralAndAdministrativeExpense0.70.60.40.3
Percentage of Revenues0.20.10.10.1
Percentage of Revenues mrk:BayerAG us-gaap:SellingGeneralAndAdministrativeExpenses us-gaap:CollaborativeArrangement0.00.00.00.0
mrk:Eisai, us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-06-302019-03-31
Value19111919
Percentage of SellingGeneralAndAdministrativeExpense0.80.40.70.8
Percentage of Revenues0.20.10.20.2
Percentage of Revenues mrk:Eisai us-gaap:SellingGeneralAndAdministrativeExpenses us-gaap:CollaborativeArrangement0.00.00.00.0

Selling General And Administrative Expense

us-gaap:InterestExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value209212219231233209203190194185190189193182180170171172169165174164165191188188215201184190178172195192189182186176173185181
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.91.81.81.92.01.91.81.81.91.81.81.81.91.91.81.61.71.81.71.61.81.71.61.81.71.81.91.81.71.61.51.41.71.61.61.51.61.51.61.61.6

us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value209212219231233209203190194185190189193182180170171172169165174164165191
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.91.81.81.92.01.91.81.81.91.81.81.81.91.91.81.61.71.81.71.61.81.71.61.8
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value390-71223-35-140-188-110172482911886-58-58-632-22-19-48-903170-739-551061914255839-172-201-282-670-200-103-142-137-66-121-622-309-1108281-167
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.6-0.61.9-0.3-1.2-1.7-1.01.60.52.90.20.8-0.6-0.6-6.2-0.2-0.2-0.5-8.81.7-7.6-0.6101.31.35.10.4-1.6-1.8-2.6-5.7-1.7-0.8-1.2-1.1-0.5-1.0-5.4-2.6-10.02.5-1.5

Other Nonoperating Income Expense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3519383827912347325930672604266520861345187920024392003-1356288715041624816239780713811181114901891209115251245155013342218268025071581235216721729-7014981241
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues32.431.823.518.927.728.423.724.719.913.418.01.924.621.2-13.427.415.317.48.023.88.214.7112.714.117.320.413.811.314.511.419.321.821.412.919.613.814.9-5.84.510.9

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value6113913710194304155-2-87-81-7843142140219322727219522615225779
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest1.73.64.94.32.91.01.62.1-0.1-6.5-4.3-39.01.87.1-10.30.76.214.033.38.128.011.02.25.3
Percentage of Revenues0.61.21.20.80.80.30.40.5-0.0-0.9-0.8-0.80.41.51.40.20.92.42.71.92.31.62.50.7
Percentage of Revenues us-gaap:CorporateNonSegment66.384.280.175.473.433.753.291.7-5.4280.6-135.0-113.037.465.766.718.156.474.9254.264.672.966.12336.477.5
us-gaap:OperatingSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value696779567248816875186991657868936302628062566411612156325860655158445503591960705689560360976311
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest198.0207.3259.7348.0230.7227.9252.6258.6302.1466.9332.93205.5251.0281.2-432.2226.9388.6338.9725.4253.2705.0405.751.6423.6
Percentage of Revenues64.166.061.165.963.964.659.863.960.262.660.062.161.659.757.962.259.459.157.960.358.159.458.259.8
Percentage of Revenues us-gaap:OperatingSegments64.666.962.066.664.665.260.264.260.462.460.362.562.461.159.262.960.461.158.662.160.060.958.260.4

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mrk:AnimalHealthsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value407478366423405415386409450413350389395417
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest11.612.513.118.012.413.514.815.321.630.718.6194.516.220.8
Percentage of Revenues3.74.03.13.43.43.83.53.84.34.13.43.84.04.4
Percentage of Revenues us-gaap:OperatingSegments mrk:AnimalHealthsegment37.039.432.637.736.040.537.340.141.338.835.738.941.444.4
us-gaap:OperatingSegments, mrk:Pharmaceuticalsegment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value656074776887774771156574618364795826580458645929561351805482616254205117557056415282516556895772
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest186.4194.8246.8330.1218.3214.3237.4243.1279.3431.5312.12964.5230.1258.6-404.3213.4360.4315.1682.6235.3654.5374.048.2387.4
Percentage of Revenues60.362.058.062.560.560.856.260.055.757.856.257.456.554.954.258.555.155.054.556.054.054.854.354.7
Percentage of Revenues us-gaap:OperatingSegments mrk:Pharmaceuticalsegment67.870.265.469.868.068.062.967.162.865.163.164.864.163.361.665.362.363.161.763.261.762.560.763.2
us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value01-5-2-22952663392482508452378389424386349429407438408539
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest0.00.0-0.2-0.1-0.10.10.30.21.24.720.9241.020.822.6-27.913.528.223.842.817.950.431.73.536.2
Percentage of Revenues0.00.0-0.0-0.0-0.00.00.10.00.20.63.84.75.14.83.73.74.34.13.44.34.24.63.95.1
Percentage of Revenues us-gaap:OperatingSegments us-gaap:AllOtherSegments0.04.3-11.9-4.3-4.25.116.49.146.475.0380.6482.0503.043.8-15.339.843.342.732.350.744.747.137.140.8

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeTaxExpenseBenefit



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5096194284406152058267073706042917251488447-769699295494-1665661194234484648-142360375310-6638545586074038628-382658-201126461286
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.75.13.63.55.21.97.56.53.56.028.02.44.94.7-7.66.63.05.3-1.65.61.24.542.86.1-1.33.53.42.8-0.63.34.07.06.30.35.2-3.15.7-1.71.14.12.5

Income Tax Expense Benefit

us-gaap:ProfitLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value301032192363190726442862177819581716741-1038-5119511556-5872188120911309821831688958732784220331731115093516169491763182017671543172420541071-500372780330
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.726.719.915.422.526.516.218.116.47.4-9.9-0.519.616.5-5.820.812.312.19.618.27.010.269.98.018.616.910.48.515.18.115.314.815.112.614.316.99.2-4.13.36.92.9

Profit Loss

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value300030211553187326543114143319211645860-10119319321697-156920181313107914021585522110959913411800240011001500-335-506
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.625.113.115.122.628.813.017.815.78.6-9.70.919.518.0-15.519.213.311.613.715.75.311.857.23.215.019.89.513.5-3.0-4.4

Comprehensive Income Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-2-198-803-28-16199-394-29-6212435149-14146-974-166108-46425-241-165156-1325-554-2651862-13153-16428691-85-41963394
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.0-1.6-6.8-0.2-0.11.8-3.6-0.3-0.61.20.31.4-0.11.5-9.6-1.61.1-0.54.2-2.4-1.71.7-12.6-5.2-2.40.20.6-1.20.5-14.00.70.7-0.7-3.40.53.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-2-198-803-28-16199-394-29-6212435149-14146-974-166108-46425-241-165156-1325-554-2651853-16428691-85-41963
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
Percentage of Revenues-0.0-1.6-6.8-0.2-0.11.8-3.6-0.3-0.61.20.31.4-0.11.5-9.6-1.61.1-0.54.2-2.4-1.71.7-12.6-5.2-2.40.20.5-14.00.70.7-0.7-3.40.5
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:NetIncomeLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value300232192356190126702915182719501707736-1046-5619461551-5952184120511259771826687953731689520041705112490615939071729179317381512169220241043-532342752299
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.626.719.915.322.727.016.618.116.37.3-10.0-0.519.616.4-5.920.712.212.19.618.17.010.169.88.518.316.610.28.214.97.715.114.614.812.314.116.79.0-4.43.16.62.6

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value300232192356190126702915182719501707736-1046-5619451551-595218512051125977182668695373168952004170515939071730179317381512169320241043-532342752299
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0100.0100.1100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.626.719.915.322.727.016.618.116.37.3-10.0-0.519.616.4-5.920.712.212.19.618.17.010.169.88.518.316.614.97.715.114.614.812.314.116.79.0-4.43.16.62.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8076-26-53-4989585558445551511-532926262923423427293132302832302831
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.00.10.0-0.2-0.5-0.40.10.10.00.10.00.10.10.10.00.00.10.00.00.00.10.1-0.50.30.30.20.30.20.40.30.20.20.30.30.20.20.30.30.20.3

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value876-26-53-4989585658445552511-52292623423327293131302832302831
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0120.0100.0100.0100.0100.0100.0100.0100.0200.0100.0100.098.1100.0100.0100.0100.097.1100.0100.0100.096.9100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.0-0.2-0.5-0.40.10.10.00.10.00.10.10.10.00.00.10.00.00.00.10.1-0.50.30.30.20.40.30.20.20.30.30.20.20.30.30.20.3
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:Assets



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9061584913843978333183965823548263785130850408604187872916769280496561953779833596475987551017791012321025821083459833510180897860108460105645106419106876106200106132106301105525105509105128106534106195105865105781112314
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement

us-gaap:Liabilities

mrk:AstraZeneca, mrk:Lynparza, mrk:SalesBasedMilestones


Period End2020-06-302019-12-312019-06-302018-12-31
Value400300300600
Percentage of Liabilities100.0100.0100.0100.0
Percentage of Assets0.40.40.40.7
Percentage of Assets mrk:AstraZeneca mrk:Lynparza mrk:SalesBasedMilestones0.00.00.00.0
mrk:Eisai, mrk:Lenvima, mrk:SalesBasedMilestones


Period End2020-06-302019-12-312019-03-312018-12-31
Value370682282268
Percentage of Liabilities92.5227.30.044.7
Percentage of Assets0.40.80.30.3
Percentage of Assets mrk:Eisai mrk:Lenvima mrk:SalesBasedMilestones0.00.00.00.0

Liabilities

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9061584913843978333183965823548263785130850408604187872916769280496561953779833596475987551017791012321025821083459833510180897860108460105645106419106876106200106132106301105525105509105128106534106195105865105781112314
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value27642262052590726838276352753926701324223252933668343363824839463398374008843744433574380644676455874644847765486474522448358499754976547419475005302953020557475519454860545175514055496543845437659058
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.530.930.732.232.933.432.338.138.339.139.141.742.541.342.044.544.944.443.945.045.344.149.544.449.446.147.144.644.449.950.052.452.352.051.951.852.351.451.452.6

Stockholders Equity

us-gaap:AssetsCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value29343261742748326142242982535125875268362406424085247662791928167315303061429440279262877229764285672831932927331733472333587412403568537765369953524434857362293563934344331813410932368310242906428432
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.430.832.631.428.930.831.331.528.328.028.230.530.432.732.129.928.929.129.228.227.630.433.734.134.338.033.835.534.633.232.834.133.832.631.632.030.529.327.525.3

Assets Current

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value11103742596767869665980767965782653104483609279017786117086515790766089700852475486922798074411137097431582815621140901509013024134511736016752146561353114253123421169510900987486668236931143685336
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.38.711.59.47.99.89.69.26.25.26.98.68.412.16.88.06.89.88.47.56.77.47.611.210.014.614.813.214.112.312.716.315.913.912.913.411.611.010.30.00.00.08.30.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:AccountsReceivableNetCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value75778182677884427964760870717374728772456873767174397066701873646916685064846414651066706626651570227188718475787779796576727952815287268261813684757344
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.49.68.010.19.59.28.68.78.68.47.88.48.07.37.47.57.26.96.46.36.36.26.76.47.26.66.87.17.37.57.27.57.78.37.97.68.06.9

Accounts Receivable Net Current

us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

us-gaap:ReceivablesNetCurrent

mrk:AstraZeneca, us-gaap:OtherCurrentAssets, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value168142128
Percentage of ReceivablesNetCurrent100.0100.0100.0
Percentage of Assets0.20.20.2
Percentage of Assets mrk:AstraZeneca us-gaap:OtherCurrentAssets us-gaap:CollaborativeArrangement0.00.00.0
mrk:BayerAG, us-gaap:OtherCurrentAssets, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value625049
Percentage of ReceivablesNetCurrent36.935.238.3
Percentage of Assets0.10.10.1
Percentage of Assets mrk:BayerAG us-gaap:OtherCurrentAssets us-gaap:CollaborativeArrangement0.00.00.0
mrk:Eisai, us-gaap:OtherCurrentAssets, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value173140150
Percentage of ReceivablesNetCurrent103.098.6117.2
Percentage of Assets0.20.20.2
Percentage of Assets mrk:Eisai us-gaap:OtherCurrentAssets us-gaap:CollaborativeArrangement0.00.00.0

Receivables Net Current

us-gaap:InventoryNet



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6056584659785855584757125440541651785382509652635407514648665244524851024700512353065539557158196136637662266741676667736535673162496339625462396225605758688048
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.76.97.17.07.06.96.66.46.16.35.85.75.85.35.15.35.45.24.65.15.25.15.75.76.35.95.96.36.36.46.26.35.96.05.95.95.95.75.57.2

Inventory Net

us-gaap:InventoryFinishedGoods



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2032175317721698175016981658158515191530133413641396135513041421143714171343152814971698158818112125164217381757221420551924195218081779198316401440138414842466
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.12.12.02.12.12.01.91.81.81.51.51.51.41.41.41.51.41.31.51.51.61.61.82.21.51.61.72.11.91.81.81.71.71.91.51.41.31.42.2

Inventory Finished Goods

us-gaap:InventoryLIFOReserve



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11913817167296-110-11-25-45-142-258-275-302-320-357-375-384-366-346-334-309-220-169-116-73-52-49-47-5210397843112141170186167
Percentage of InventoryLIFOReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.10.00.0-0.00.0-0.0-0.0-0.1-0.2-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.3-0.3-0.3-0.2-0.2-0.1-0.1-0.0-0.0-0.0-0.00.00.00.10.00.10.10.20.20.1

Inventory L I F O Reserve

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value18182177061768617281170491662316324165681656716483166021666116375161711574916022160051605215923160431630616794180041876118866186221812117805175941762217385174751704916697161761567415195145151348112595
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.120.921.020.720.320.219.819.519.519.218.918.217.616.716.516.316.616.315.615.815.915.518.318.419.317.217.216.716.516.616.416.416.215.815.414.714.313.712.711.2

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value1578915269150531428713862135061329112755126261256112439121891209412042120261202911987123601250712482126301291013136134381389314296149731532315683158021603015884158671612416297163831667116833170821827912000
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.418.017.817.116.516.416.115.014.814.614.213.313.012.512.612.212.412.512.312.312.311.913.413.214.213.214.214.414.714.915.114.915.015.315.515.415.715.916.116.30.0

Property Plant And Equipment Net

us-gaap:Goodwill



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value200671976719425194801949018170182531825818274183041828418340183581835818162182601780917784177231776117707177401299213171117891212012301121211219812207121341216812158121561215512228123821220712378120381439
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.123.323.023.423.222.122.121.421.521.320.820.019.819.019.018.618.518.017.417.517.316.413.212.912.011.211.611.411.411.511.411.411.511.511.611.511.711.511.710.70.0

us-gaap:BusinessAcquisition

mrk:Themis


Period End2020-06-30
Value215
Percentage of Goodwill1.1
Percentage of Assets0.2
Percentage of Assets mrk:Themis0.0

Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value16566160961419612307133811099911431121751289813500141831513816119168631730520506203152136422602237242475026080203862039518830205172380125002263332810829083303253162033000343023582237065379063945647757
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.319.016.814.815.913.413.814.315.215.716.116.517.417.518.120.921.121.622.223.424.124.120.720.019.218.922.523.524.626.527.428.530.031.332.633.634.935.837.342.5

Intangible Assets Net Excluding Goodwill

us-gaap:ProductOrService, us-gaap:BalanceSheetLocation

us-gaap:FiniteLivedIntangibleAssetsNet

mrk:Adempas, us-gaap:OtherIntangibleAssets


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8328448838939569771000
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.01.01.11.11.21.2
Percentage of Assets mrk:Adempas us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.0
mrk:Lenvima, us-gaap:OtherNoncurrentAssets


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1200921664687711479266
Percentage of FiniteLivedIntangibleAssetsNet144.2109.174.471.972.847.90.0
Percentage of Assets1.31.10.80.80.90.60.3
Percentage of Assets mrk:Lenvima us-gaap:OtherNoncurrentAssets0.00.00.00.00.00.00.0
mrk:Lynparza, us-gaap:OtherNoncurrentAssets


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value13009289831000724743468
Percentage of FiniteLivedIntangibleAssetsNet156.2110.0110.1104.674.174.30.0
Percentage of Assets1.41.11.21.20.90.90.5
Percentage of Assets mrk:Lynparza us-gaap:OtherNoncurrentAssets0.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssetsNoncurrent

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value132281380546586483364236275232171171163158148161155155
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.30.50.70.70.60.40.30.30.30.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value00006815322125337041048156365767278988485919
Percentage of OtherAssetsNoncurrent0.00.00.00.011.631.760.7107.2134.5176.7281.3329.2403.1425.3533.1549.1554.212.3
Percentage of Assets0.00.00.00.00.10.20.30.30.40.50.50.60.70.70.80.90.90.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:EquitySecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value58219320485528427309182211168171
Percentage of OtherAssetsNoncurrent43.977.984.288.890.188.484.977.176.772.4100.0
Percentage of Assets0.10.30.40.60.60.50.40.20.20.20.2
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.0
us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value746260615856555464640
Percentage of OtherAssetsNoncurrent56.122.115.811.29.911.615.122.923.327.60.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.0
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring us-gaap:USGovernmentAgenciesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.0
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00001941106112160161207
Percentage of OtherAssetsNoncurrent0.00.00.00.03.28.529.147.558.269.4121.1
Percentage of Assets0.00.00.00.00.00.00.10.10.20.20.2
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:USGovernmentAgenciesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value13228138054665463658548964564265273482083093710451014174
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0111.6131.7160.7207.2234.5276.7381.3429.2503.1525.3633.1649.1654.2112.3
Percentage of Assets0.10.30.50.70.80.80.70.60.80.70.70.80.90.91.01.11.10.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:EquitySecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value58219320485528427309182211168171
Percentage of OtherAssetsNoncurrent43.977.984.288.890.188.484.977.176.772.4100.0
Percentage of Assets0.10.30.40.60.60.50.40.20.20.20.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:EquitySecurities0.00.00.00.00.00.00.00.00.00.00.0
us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value746260617797161166224225207
Percentage of OtherAssetsNoncurrent56.122.115.811.213.120.144.270.381.597.0121.1
Percentage of Assets0.10.10.10.10.10.10.20.20.30.30.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:USGovernmentAgenciesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.0

Other Assets Noncurrent

us-gaap:LiabilitiesCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22178234832222020684200851854322206185861812816960186141946718758198231720415555149181756819203175831750820442187662592717928224701786818215184021880218348155831691216582162451659315763156621564115641
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.527.726.324.823.922.526.921.821.319.721.221.220.220.518.015.815.517.818.917.417.118.919.125.518.320.716.917.117.217.717.314.716.015.715.515.614.814.814.813.9

us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

mrk:AstraZeneca, us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value324326577
Percentage of LiabilitiesCurrent1.51.42.6
Percentage of Assets0.40.40.7
Percentage of Assets mrk:AstraZeneca us-gaap:AccountsPayableAndAccruedLiabilities us-gaap:CollaborativeArrangement0.00.00.0
mrk:Eisai, us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value325425700
Percentage of LiabilitiesCurrent1.51.83.2
Percentage of Assets0.40.50.8
Percentage of Assets mrk:Eisai us-gaap:AccountsPayableAndAccruedLiabilities us-gaap:CollaborativeArrangement0.00.00.0

Liabilities Current

us-gaap:DebtCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value47186361361034113816317553083656337920553057515731815037568148764421132585254324834728270492754477855945213976558247364315202939222930199024552523220224001379
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.27.54.34.14.53.96.44.34.02.43.55.63.45.20.61.50.72.12.52.52.44.42.79.14.67.94.33.75.24.54.11.93.72.81.92.32.42.12.31.2

Debt Current

us-gaap:AccountsPayableCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3448357237383198314230183318309130243162310226202934248428072481251422412533202323352091262522792326243422742469225320841753180416742358246222822143240223082244
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.24.43.83.73.74.03.63.63.73.52.93.22.62.92.52.62.32.52.02.31.92.72.22.42.22.22.32.12.01.71.71.62.22.32.12.02.32.22.0

Accounts Payable Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12661033736873634807197175966171770839619792330223912081213186415602119187824501606246719259525112984091075120015121091119078114621174132612431167
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.20.91.00.81.02.40.90.80.80.80.42.12.42.31.21.31.91.52.11.82.31.62.40.20.50.21.20.41.01.11.41.01.10.71.41.11.31.21.0

Accrued Income Taxes Current

us-gaap:DividendsPayableCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1564158515871434143914621458130413091317132013021301131413161292129213071309128812951306130812881303132713211289128613381343131513081281128111661176117711761189
Percentage of DividendsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.91.91.71.71.81.81.51.51.51.51.41.41.41.41.31.31.31.31.31.31.21.31.31.31.21.31.21.21.31.31.21.21.21.21.11.11.11.11.1

Dividends Payable Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value11182109321254911768110541008110151977697559709104279992936386581027490879255100431121696109517986710523980888298707950191838872956997378923891788239731922887478514
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.312.914.914.113.212.212.311.511.511.311.910.910.19.010.89.29.610.211.09.59.39.110.79.69.08.09.08.68.39.09.28.48.58.49.38.78.28.0

Other Liabilities Current

us-gaap:CounterpartyName, us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

us-gaap:LiabilitiesNoncurrent

mrk:AstraZeneca, us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:CollaborativeArrangement


Period End2020-06-302019-12-31
Value4000
Percentage of LiabilitiesNoncurrent100.0100.0
Percentage of Assets0.40.0
Percentage of Assets mrk:AstraZeneca us-gaap:AccountsPayableAndAccruedLiabilities us-gaap:CollaborativeArrangement0.00.0
mrk:Eisai, us-gaap:OtherNoncurrentLiabilities, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-31
Value570300525
Percentage of LiabilitiesNoncurrent142.50.0100.0
Percentage of Assets0.60.40.6
Percentage of Assets mrk:Eisai us-gaap:OtherNoncurrentLiabilities us-gaap:CollaborativeArrangement0.00.00.0

Liabilities Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value26156216372273622677227712272119806199361995921501213532183821706234372427423656236422365623929241242406925506186991856618590195892053922647225261608916254175711505715228155251569215783156441548216095
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.925.526.927.227.127.624.023.423.525.024.323.823.424.325.524.124.524.023.523.823.523.519.018.219.018.119.421.321.115.115.316.514.314.414.814.714.914.814.614.3

Long Term Debt Noncurrent

us-gaap:MinorityInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10295948710213118123423723323325124925122021389959192190152144136158258925612587260525772443246524792454242624562426245524292427
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.20.20.30.30.30.30.30.30.30.20.20.10.10.10.10.20.10.10.10.22.42.42.42.42.42.32.32.32.32.32.32.32.32.32.2

Minority Interest

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1244611550119701108511283115851204111887120281147311117771380688324851487938378737473457887791376777813696881757956813610327
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.713.614.213.313.414.114.614.014.113.312.78.48.78.68.98.98.77.57.27.87.77.17.96.88.47.37.79.7

Other Liabilities Noncurrent

us-gaap:StockholdersEquity



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value27642262052590726838276352753926701324223252933668343363824839463398374008843744433574380644676455874644847765486474522448358499754976547419475005302953020557475519454860545175514055496543845437659058
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.530.930.732.232.933.432.338.138.339.139.141.742.541.342.044.544.944.443.945.045.344.149.544.449.446.147.144.644.449.950.052.452.352.051.951.852.351.451.452.6

Stockholders Equity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value277442630026001269252773727670268823265632766339013456938499397124008840308439574344643901447674567946638479174879145360485165256452326500065010555606554635821257673573145694357596579225683956805580485765760335614852116720591
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.631.030.832.333.033.632.538.438.539.439.342.042.841.542.344.745.044.544.045.145.544.249.644.649.648.549.547.046.952.452.354.854.754.354.254.154.553.753.70.00.00.054.70.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value-4162-4201-4261-3515-3530-3541-3556-3025-3065-3095-2787-3120-3133-3180-3206-2687-2543-2435-2407-2986-909
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-15.0-16.0-16.4-13.1-12.7-12.8-13.2-9.3-9.4-9.1-8.1-8.1-7.9-7.9-8.0-6.1-5.9-5.5-5.4-6.1-1.7
Percentage of Assets-4.6-4.9-5.0-4.2-4.2-4.3-4.3-3.6-3.6-3.6-3.2-3.4-3.4-3.3-3.4-2.7-2.6-2.5-2.4-3.0-0.9
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1513531157661181669265-201-108-103-37106338404
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.50.10.60.20.40.60.30.2-0.6-0.3-0.3-0.10.30.80.9
Percentage of Assets0.00.20.00.20.10.10.20.10.1-0.2-0.1-0.1-0.00.10.40.4
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value001831484-78-124-164-167-612107540-31371671044111154
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.10.10.20.0-0.3-0.4-0.5-0.5-0.20.50.20.1-0.00.30.40.20.10.20.1
Percentage of Assets0.00.00.00.00.10.0-0.1-0.1-0.2-0.2-0.10.20.10.0-0.00.10.20.10.00.10.1
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:AccumulatedOtherComprehensiveIncome


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value-6393-6391-6193-5390-5362-5346-5545-5151-5122-5060-4910-4945-5094-5080-5226-4252-4086-4194-4148-4573-4332-4167-4323-2998-2444-2179-2197-4698-4760-4629-4682-3040-3126-3217-3132-2713-2776-3170-3216-3490-4659-3572-2767-2554-826
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-23.0-24.3-23.8-20.0-19.3-19.3-20.6-15.8-15.6-14.9-14.2-12.8-12.8-12.7-13.0-9.7-9.4-9.6-9.3-10.0-9.3-8.7-8.9-6.6-5.0-4.1-4.2-9.4-9.5-8.3-8.4-5.2-5.4-5.6-5.5-4.7-4.8-5.6-5.7-6.0-8.1-5.9-4.5-12.1-4.0
Percentage of Assets-7.1-7.5-7.3-6.5-6.4-6.5-6.7-6.1-6.0-5.9-5.6-5.4-5.5-5.3-5.5-4.3-4.2-4.2-4.1-4.5-4.2-3.8-4.4-2.9-2.5-2.0-2.1-4.4-4.5-4.4-4.4-2.9-3.0-3.0-3.0-2.5-2.6-3.0-3.00.00.00.0-2.50.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value-2246-2325-1981-2063-1946-1927-2077-2094-1958-1597-1954-1932-1999-2046-2355-1739-1821-2065-2186-1978-1474
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-8.1-8.8-7.6-7.7-7.0-7.0-7.7-6.4-6.0-4.7-5.7-5.0-5.0-5.1-5.8-4.0-4.2-4.7-4.9-4.1-2.8
Percentage of Assets-2.5-2.7-2.3-2.5-2.3-2.3-2.5-2.5-2.3-1.9-2.2-2.1-2.2-2.1-2.5-1.8-1.9-2.1-2.1-2.0-1.4
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:AdditionalPaidInCapital


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value393733969739660395613948438768388083976239741398743990239823397763989939939398973991140145402224013940114403554042340340401994045040508399093989140727406464047140550406524066340717406574069040701405574033840197396838319
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest141.9150.9152.5146.9142.4140.1144.4121.8121.3117.6115.4103.4100.299.599.190.891.991.489.887.986.084.282.888.982.977.077.479.879.673.273.369.570.370.971.470.770.271.671.769.970.066.664.539.3
Percentage of Assets43.546.847.047.547.047.147.046.746.746.345.443.442.941.341.940.641.440.739.539.739.137.241.139.641.137.338.337.537.338.338.338.138.438.538.738.238.338.438.50.00.00.035.30.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:CommonStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value17881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881786178617813030
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest6.46.86.96.66.46.56.75.55.55.35.24.64.54.54.44.14.14.14.03.93.83.73.73.93.73.43.43.63.63.23.23.13.13.13.13.13.13.13.13.13.13.02.90.10.1
Percentage of Assets2.02.12.12.12.12.22.22.12.12.12.02.01.91.91.91.81.91.81.81.81.71.71.81.81.81.61.71.71.71.71.71.71.71.71.71.71.71.71.70.00.00.01.60.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:NoncontrollingInterest


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1029594871021311812342372332332512492512202138995919219015214413615825892561258726052577244324652479245424262456242624552429245524262457242724092407
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.40.40.40.30.40.50.70.70.70.70.70.70.60.60.50.50.20.20.20.20.40.30.30.30.34.94.95.25.24.64.44.24.34.34.34.34.24.34.34.24.24.13.911.411.7
Percentage of Assets0.10.10.10.10.10.20.20.30.30.30.30.30.30.30.20.20.10.10.10.10.20.10.10.10.22.42.42.42.42.42.32.32.32.32.32.32.32.32.30.00.00.02.20.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:RetainedEarnings


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value497244827246602458044529544065425794218941523411074135043701450464438744133460284512145192453484566045103456924602139989403663966139257397733991540272399854039039950394413899038763382433740037536392464008240511414054369939141
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest179.2183.5179.2170.1163.3159.3158.4129.2126.7121.3119.6113.5113.4110.7109.5104.7103.9102.9101.3100.096.795.494.388.283.275.575.079.579.772.472.169.469.368.868.567.366.065.866.167.669.567.167.3206.4190.1
Percentage of Assets54.956.855.255.053.953.551.549.648.847.847.147.748.546.046.346.846.845.844.645.144.042.246.839.341.236.637.237.437.337.937.738.037.937.437.136.436.035.335.50.00.00.036.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value-56850-57161-55950-54925-53570-51736-50929-46166-45401-44041-43794-42119-42053-41157-40546-39717-39377-39125-38534-37427-36225-35903-35262-33895-31551-29745-29591-29353-29334-25129-24717-23862-23968-23804-23792-23415-22416-22324-22433-22508-22316-21044-21044-30736-28175
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-204.9-217.3-215.2-204.0-193.1-187.0-189.5-141.4-138.6-129.9-126.7-109.4-105.9-102.7-100.6-90.4-90.6-89.1-86.1-81.9-77.7-74.9-72.3-74.7-65.0-56.6-56.6-58.7-58.5-45.2-44.6-41.0-41.6-41.5-41.8-40.7-38.7-39.3-39.5-38.8-38.7-34.9-34.2-145.2-136.8
Percentage of Assets-62.7-67.3-66.3-65.9-63.8-62.8-61.6-54.2-53.4-51.2-49.8-45.9-45.3-42.6-42.5-40.4-40.8-39.6-37.9-37.0-35.3-33.1-35.9-33.3-32.2-27.4-28.0-27.6-27.4-23.7-23.3-22.4-22.7-22.6-22.6-22.0-21.1-21.1-21.20.00.00.0-18.70.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:CommonStockValue



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881788178817881781
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.12.12.12.12.22.22.12.12.12.02.01.91.91.91.81.91.81.81.81.71.71.81.81.81.61.71.71.71.71.71.71.71.71.71.71.71.71.71.6

Common Stock Value

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value39373396973966039561394843876838808397623974139874399023982339776398993993939897399114014540222401394011440355404234034040199404504050839909398914072740646404714055040652406634071740657406904070139683
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.546.847.047.547.047.147.046.746.746.345.443.442.941.341.940.641.440.739.539.739.137.241.139.641.137.338.337.537.338.338.338.138.438.538.738.238.338.438.535.3

Additional Paid In Capital Common Stock

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value49724482724660245804452954406542579421894152341107413504370145046443874413346028451214519245348456604510345692460213998940366396613925739773399154027239985403903995039441389903876338243374003753641405
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets54.956.855.255.053.953.551.549.648.847.847.147.748.546.046.346.846.845.844.645.144.042.246.839.341.236.637.237.437.337.937.738.037.937.437.136.436.035.335.536.9

Retained Earnings Accumulated Deficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value-6393-6391-6193-5390-5362-5346-5545-5151-5122-5060-4910-4945-5094-5080-5226-4252-4086-4194-4148-4573-4332-4167-4323-2998-2444-2179-2197-4698-4760-4629-4682-3040-3126-3217-3132-2713-2776-3170-3216-3490-4659-3572-2767
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-7.1-7.5-7.3-6.5-6.4-6.5-6.7-6.1-6.0-5.9-5.6-5.4-5.5-5.3-5.5-4.3-4.2-4.2-4.1-4.5-4.2-3.8-4.4-2.9-2.5-2.0-2.1-4.4-4.5-4.4-4.4-2.9-3.0-3.0-3.0-2.5-2.6-3.0-3.00.00.00.0-2.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:TreasuryStockValue



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value56850571615595054925535705173650929461664540144041437944211942053411574054639717393773912538534374273622535903352623389531551297452959129353293342512924717238622396823804237922341522416223242243321044
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.767.366.365.963.862.861.654.253.451.249.845.945.342.642.540.440.839.637.937.035.333.135.933.332.227.428.027.627.423.723.322.422.722.622.622.021.121.121.218.7

Treasury Stock Value

us-gaap:MinorityInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10295948710213118123423723323325124925122021389959192190152144136158258925612587260525772443246524792454242624562426245524292427
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.20.20.30.30.30.30.30.30.30.20.20.10.10.10.10.20.10.10.10.22.42.42.42.42.42.32.32.32.32.32.32.32.32.32.2

Minority Interest

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders



Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value102141155831410166123155811170-5321581592581591
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value102141155831410166123155811170-5321581592581591
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3367707479442263084133635922793338211554015-1171331728636322971161521584247330525852284-11644348231523612341180931392920215432334577285217213539259233251366
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues31.05.940.434.126.212.432.725.932.311.538.5-11.333.43.035.928.216.423.241.632.826.424.2-11.141.221.223.021.915.427.323.718.426.338.123.514.929.323.329.312.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-882-1628-763191-242536821781660673-197-58671-11273193-2563-890-14981741-617-612525-66057204-3722-49-3807-1153-4398-1839-298-270-1684-263-1048105-1007194464-3148
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-8.1-13.5-6.41.5-20.63.419.815.46.4-2.0-0.66.5-11.333.8-25.3-8.4-15.218.7-6.0-0.625.8-70.168.7-35.3-0.4-37.1-10.8-37.5-16.0-2.4-2.3-13.7-2.2-8.60.9-8.31.74.1-27.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1137-1490-2011-3152-2084-1614-5566-1905-2967-2722-5785536-62181461-1977-835-3381-2851-2407-2533-54855155-96431279-83691620-1421-1218-738-586-725-2231-2244-1257-1172-1295-1625-3463942
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.5-12.4-16.9-25.4-17.7-14.9-50.6-17.6-28.4-27.1-55.45.2-62.615.5-19.5-7.9-34.3-30.6-23.6-25.1-56.154.7-92.012.1-76.515.8-13.3-10.4-6.4-4.8-6.2-18.1-18.7-10.3-10.1-10.7-14.6-30.58.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3367707479442263084133635922793338211554015-1171331728636322971161521584247330525852284-11644348231523612341180931392920215432334577285217213539259233251366
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues31.05.940.434.126.212.432.725.932.311.538.5-11.333.43.035.928.216.423.241.632.826.424.2-11.141.221.223.021.915.427.323.718.426.338.123.514.929.323.329.312.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetIncomeLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value300232192356190126702915182719501707736-1046-5619461551-5952184120511259771826687953731689520041705112490615939071729179317381512169220241043-532342752299
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.626.719.915.322.727.016.618.116.37.3-10.0-0.519.616.4-5.920.712.212.19.618.17.010.169.88.518.316.610.28.214.97.715.114.614.812.314.116.79.0-4.43.16.62.6

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value300232192356190126702915182719501707736-1046-5619451551-595218512051125977182668695373168952004170515939071730179317381512169320241043-532342752299
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0100.0100.1100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.626.719.915.322.727.016.618.116.37.3-10.0-0.519.616.4-5.920.712.212.19.618.17.010.169.88.518.316.614.97.715.114.614.812.314.116.79.0-4.43.16.62.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:ProfitLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value301032192363190726442862177819581716741-1038-5119511556-5872188120911309821831688958732784220331731115093516169491763182017671543172420541071-500372780330
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues27.726.719.915.422.526.516.218.116.47.4-9.9-0.519.616.5-5.820.812.312.19.618.27.010.269.98.018.616.910.48.515.18.115.314.815.112.614.316.99.2-4.13.36.92.9

Profit Loss

us-gaap:DepreciationDepletionAndAmortization



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1048821936845973898109510611226113711281154116211931155117515501561156015701608163715731611175317541674166117231804179018611903183218311866188019481687
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value390381404382427359328324332350342334332370357365438430398383393396557595
Percentage of DepreciationDepletionAndAmortization37.246.443.245.243.940.030.030.527.130.830.328.928.631.030.931.128.327.525.524.424.424.235.436.9

Depreciation Depletion And Amortization

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4082-170-237-343194-118-133-228-30-2020-329-218-54-145655-50-7082-463-204-179-827-527-942-304-7195282-324-41-563-133-627-214-349-424-471152
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Income Tax Expense Benefit

us-gaap:ShareBasedCompensation



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12110811110111193879190808076827475778068787583636975785668756778889376828610793109126142132
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-882-1628-763191-242536821781660673-197-58671-11273193-2563-890-14981741-617-612525-66057204-3722-49-3807-1153-4398-1839-298-270-1684-263-1048105-1007194464-3148
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-8.1-13.5-6.41.5-20.63.419.815.46.4-2.0-0.66.5-11.333.8-25.3-8.4-15.218.7-6.0-0.625.8-70.168.7-35.3-0.4-37.1-10.8-37.5-16.0-2.4-2.3-13.7-2.2-8.60.9-8.31.74.1-27.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1137-1490-2011-3152-2084-1614-5566-1905-2967-2722-5785536-62181461-1977-835-3381-2851-2407-2533-54855155-96431279-83691620-1421-1218-738-586-725-2231-2244-1257-1172-1295-1625-3463942
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.5-12.4-16.9-25.4-17.7-14.9-50.6-17.6-28.4-27.1-55.45.2-62.615.5-19.5-7.9-34.3-30.6-23.6-25.1-56.154.7-92.012.1-76.515.8-13.3-10.4-6.4-4.8-6.2-18.1-18.7-10.3-10.1-10.7-14.6-30.58.2

Net Cash Provided By Used In Financing Activities

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value444500004958000010710800-2-179413145010
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Issuance Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1195100001280-12005100380201300035150085110329026610223506182022701212614652634622
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value157715511405139414681428127712851311129912831283130712941271127413001279126312721302128012591282133912901306128012771280127911651175117611751175118111891189
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value0128110501405123510905933996159656617021591134101910168456609131181128170910151620267022461167580115245452945656210450296
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:RepaymentsOfLongTermDebt



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1195100001280-12005100380201300035150085110329026610223506182022701212614652634622
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.1450.1610.00200000000000000180.1870.1890.0670.0119999999999999550.2650.1780.4490.3741.2550.20.223-0.0930.2420.1960.304-0.0680.2360.1470.3060.1510.435-0.0750.1720.2460.249-0.0430.00100000000000000090.2050.3210.295-0.0289999999999999980.267-0.2280.380.035000000000000030.2530.3710.464
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:PerformanceShares


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000000000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:RestrictedStockUnitsRSU


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value500-150006000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod198066.77.5-122.7100.0100.011.5119.5100.028662.514.6175.0100.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value111477460993478716660807779677828531244866096790177861170865158524
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:ProceedsFromRepaymentsOfShortTermDebt



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-16163583182-360603-413528302252070-1-19881986-38083784-909918-90-143-37062177-35374963-50353149880904-19171003634-280-401593-197-1483-85
Percentage of ProceedsFromRepaymentsOfShortTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:ConsolidationItems

mrk:AmortizationOfPurchaseAccountingAdjustments

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2992953143293783975206797327337347657797787607721024113411941184123812389841008
Percentage of AmortizationOfPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:CollaborativeArrangementProfitSharing

mrk:AstraZeneca, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-06-302019-06-30
Value178111
Percentage of CollaborativeArrangementProfitSharing100.0100.0
mrk:BayerAG, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7953605051423947282535323153
Percentage of CollaborativeArrangementProfitSharing44.40.00.00.045.90.00.00.00.00.00.00.00.00.0
mrk:Eisai, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-06-302019-06-30
Value15197
Percentage of CollaborativeArrangementProfitSharing84.887.4

us-gaap:CounterpartyName, us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

mrk:CollaborativeArrangementSalesNet

mrk:BayerAG, us-gaap:Sales, us-gaap:CollaborativeArrangement


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5756575753485247474344383631
Percentage of CollaborativeArrangementSalesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName

mrk:ContingentPaymentsCollaborativeArrangement

mrk:IAVI


Period End2020-05-31
Value100
Percentage of ContingentPaymentsCollaborativeArrangement100.0

us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement

mrk:AstraZeneca, mrk:Lynparza, mrk:RegulatoryMilestones


Period End2020-06-302020-03-312019-09-30
Value-30017000
Percentage of ContingentPaymentsCollaborativeArrangement0.00.00.0

us-gaap:CounterpartyName, us-gaap:TypeOfArrangement

mrk:AstraZeneca, mrk:SalesBasedMilestones


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-07-31
Value-400310000-3003400-25004100
Percentage of ContingentPaymentsCollaborativeArrangement0.00.00.00.00.00.00.00.00.0
mrk:BayerAG, mrk:SalesBasedMilestones


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value040000040000
Percentage of ContingentPaymentsCollaborativeArrangement0.00.00.00.00.00.00.00.0
mrk:Eisai, mrk:RegulatoryMilestones


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-31
Value0135000135-25385
Percentage of ContingentPaymentsCollaborativeArrangement0.00.00.00.00.00.00.00.0
mrk:Eisai, mrk:SalesBasedMilestones


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-31
Value-3003000-420003420-2103970
Percentage of ContingentPaymentsCollaborativeArrangement0.00.00.00.00.00.00.00.0

mrk:CostsExpensesAndOther



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7353821990771005085017749839481298379869285541012574917431114717649834076889399767689788044-132990679043817395079765912110403927096319224107139670104799851127951062710105
Percentage of CostsExpensesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName

mrk:Licenseoptionpaymentrelatedtocollaborativearrangement

mrk:Eisai


Period End2020-03-312019-03-31
Value200325
Percentage of Licenseoptionpaymentrelatedtocollaborativearrangement100.0100.0

us-gaap:CounterpartyName, us-gaap:StatementScenario

mrk:Eisai, srt:ScenarioForecast


Period End2021-03-312020-03-31
Value125200
Percentage of Licenseoptionpaymentrelatedtocollaborativearrangement0.0100.0

us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement

mrk:MilestonePaymentsMadetoCollaborativePartner

mrk:AstraZeneca, mrk:Lynparza, mrk:RegulatoryMilestones


Period End2020-06-302019-06-302019-04-30
Value1353030
Percentage of MilestonePaymentsMadetoCollaborativePartner100.0100.0100.0
mrk:Eisai, mrk:Lenvima, mrk:SalesBasedMilestones


Period End2020-06-302020-03-312019-12-312019-09-30
Value20030000
Percentage of MilestonePaymentsMadetoCollaborativePartner148.10.00.00.0

mrk:Noncontrollinginterestchangesinownershipinterestother



Period End2020-03-312019-06-302019-03-31
Value133
Percentage of Noncontrollinginterestchangesinownershipinterestother100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Period End2020-03-312019-06-302019-03-31
Value133
Percentage of Noncontrollinginterestchangesinownershipinterestother100.0100.0100.0

mrk:OtherNonoperatingIncomeExpenseOther



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-222815829-153-83-32611238315601615332-4684310749-56543278-1510774325707200-21-13-1057
Percentage of OtherNonoperatingIncomeExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName, us-gaap:ProductOrService, us-gaap:TypeOfArrangement

mrk:ProbableContingentPaymentsCollaborativeArrangement

mrk:AstraZeneca, mrk:Lynparza, mrk:SalesBasedMilestones


Period End2020-06-302019-06-30
Value400300
Percentage of ProbableContingentPaymentsCollaborativeArrangement100.0100.0
mrk:Eisai, mrk:Lenvima, mrk:SalesBasedMilestones


Period End2020-06-302019-03-31
Value370282
Percentage of ProbableContingentPaymentsCollaborativeArrangement92.50.0

mrk:RestructuringReserveNoncashActivity



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value811188287-97-37-391463-1418-27223951217106
Percentage of RestructuringReserveNoncashActivity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve

mrk:AcceleratedDepreciation


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value735360305-98-34-11802121-6-1044917339780
Percentage of RestructuringReserveNoncashActivity90.1481.868.2106.3101.091.928.257.10.066.7-864.3-33.3385.2222.743.664.744.775.5
us-gaap:OtherRestructuring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8-4228-181-3-28661-1352477-27221812026
Percentage of RestructuringReserveNoncashActivity9.9-381.831.8-6.3-1.08.171.842.9100.033.3964.3133.3-285.2-122.756.435.355.324.5

mrk:SalesDiscounts



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3000320032003000290026003000260028002400250029002800
Percentage of SalesDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

mrk:SegmentReportingUnallocatedOtherExpensesNet

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value548122510581699123810828338218345386176268297768748739051005117510751001115013871841
Percentage of SegmentReportingUnallocatedOtherExpensesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName

mrk:UpfrontAndMilestonePaymentsMadeToCollaborativePartner

mrk:IAVI


Period End2020-05-31
Value6
Percentage of UpfrontAndMilestonePaymentsMadeToCollaborativePartner100.0

us-gaap:AccountsReceivableSale



Period End2020-06-302020-03-312019-12-312018-12-31
Value1900190027001100
Percentage of AccountsReceivableSale100.0100.0100.0100.0

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value105938796797777655357525355485257445254394752476064525670618393
Percentage of AllocatedShareBasedCompensationExpenseNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value82332213145241310106354123238697107117170138185173195182
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:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value73312286-36-55228636-10437434-43610910-24-681561310222
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3687-247420631211-14171101392516826-1610-1805115-39225193
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

us-gaap:InterestRateSwap, us-gaap:OtherNonoperatingIncomeExpense


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value867-1396452350-15-22-62-37-231
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:InterestRateSwap, us-gaap:OtherNonoperatingIncomeExpense


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1-67196-13-55-33-5991562439-20
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.610.610.60999999999999990.550.550.550.550.480.480.480.480.470.470.470.47000000000000020.460.460.460.459999999999999960.450.450.450.449999999999999960.440.440.440.430.430.430.429999999999999940.420.420.420.420000000000000150.380.380.380.38000000000000010.380.380.38
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-76-75-38-43-35-35-58-63-56-56-45-46-44-44-30-32-29
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-31-31-17-16-16-16-20-21-21-21-26-25-24-23-23-21-21
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses40.841.344.737.245.745.734.533.337.537.557.854.354.552.376.765.672.4

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-12000000.0-12000000.0-12000000.0-12000000.0-12000000.0-12000000.0-13000000.0-12000000.0-13000000.0-13000000.0-13000000.0-13000000.0-13000000.0-13000000.0-14000000.0-14000000.0-14000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-3000000.0-2000000.0-2000000.0-3000000.0-3000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit25.025.025.025.025.025.023.125.023.123.123.123.123.115.414.321.421.4

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-22000000.0-22000000.0-19000000.0-20000000.0-21000000.0-21000000.0-21000000.0-21000000.0-21000000.0-21000000.0-24000000.0-24000000.0-24000000.0-25000000.0-27000000.0-26000000.0-26000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit183.3183.3158.3166.7175.0175.0161.5175.0161.5161.5184.6184.6184.6192.3192.9185.7185.7

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value132433211711333351261
Percentage of DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value01701020002111210
Percentage of DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod0.033.329.20.033.30.0200.00.00.00.06.133.333.320.016.716.70.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value195194204202205206217209211214216210218218208203210
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1011031061061071081051061081131011019794949597
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets51.853.152.052.552.252.448.450.751.252.846.848.144.543.145.246.846.2

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1919181818182021212119202019191934
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets9.79.88.88.98.88.79.210.010.09.88.89.59.28.79.19.416.2

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value109109115115113114108109107108113114113113114116113
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3334444444454443454645444241495152
Percentage of DefinedBenefitPlanInterestCost30.331.238.338.338.939.540.739.442.142.639.838.637.236.343.044.046.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1414171718171717181820202020201921
Percentage of DefinedBenefitPlanInterestCost12.812.814.814.815.914.915.715.616.816.717.717.517.717.717.516.418.6

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value766941288425323630352471166-8
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value363326911102711161834312930433235
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost47.447.863.432.1137.5250.0108.034.444.460.097.1129.2414.3272.7716.7533.3-437.5

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-14-14-14-14-10-10-10-11-11-13-27-10-12-12-19-15-27
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-18.4-20.3-34.1-50.0-125.0-250.0-40.0-34.4-30.6-43.3-77.1-41.7-171.4-109.1-316.7-250.0337.5

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0-2-8-500-3-3-525-4-1-3-2-30
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value01-6000-20103110020
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments100.0-50.075.0-0.0100.0100.066.7-0.0-20.00.060.0-25.0-100.0-0.0-0.0-66.7100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value073101124251231151
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments100.0-87.5-60.0100.0100.0-33.3-33.3-40.0200.0500.0-25.0-200.0-100.0-550.0-166.7100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-9000000.00.00.00.00.0-4000000.00.00.0-1000000.00.00.00.00.0
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2000000.0-1000000.00.00.00.0-10000000.00.0-4000000.00.0-5000000.00.00.00.0
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements122.2100.0100.0100.0100.0250.0100.0100.0-0.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

country:US, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value8886727674718177858378807777706673
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7474605860605756586763666361595962
Percentage of DefinedBenefitPlanServiceCost84.186.083.376.381.184.570.472.768.280.780.882.581.879.284.389.484.9

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1313121212121415141414151414131413
Percentage of DefinedBenefitPlanServiceCost14.815.116.715.816.216.917.319.516.516.917.918.818.218.218.621.217.8

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:CurrencySwap, us-gaap:OtherNonoperatingIncomeExpense


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-491808-2-11857195-28-119347
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignExchangeFuture, us-gaap:Sales


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-47116-10014-8000
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet8.23.9137.5-300.08.50.07.228.6-0.00.00.0
us-gaap:TreasuryLock, us-gaap:OtherNonoperatingIncomeExpense


Period End2020-06-302019-06-30
Value-90
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet18.4-0.0

us-gaap:DividendsCommonStockCash



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1550154915581392144014291437128412911301130512891286129713001278127612811289126912751282128412721299130113069034-64321284128712851173118111791178117811811193
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1550154915581392144014291437128412911301130512891286129713001278127612811289126912751282128412721299130113069034-64321284128712851173118111791178117811811193
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value65-6343-54820-65-32-2621541979106253
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value16151514151413141315-13232522232425202423261922232417212320242829241930373237424945
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value551521201658-25-5219815325
Percentage of EquitySecuritiesFvNiGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementScenario

srt:ScenarioForecast


Period End2020-09-30
Value-300
Percentage of EquitySecuritiesFvNiGainLoss0.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value464-4119-25-39114-9510
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value010600085901756001000000025000500000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-24-54-21-38-27-101-26-42-71-7166-198-95-3-37-38-239-228-716-95-66-61-20-34-11-55-212-55-50-13-67-41-59-1-42-130-84-80
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillAndIntangibleAssetImpairment



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value200176612148104296000529027775914
Percentage of GoodwillAndIntangibleAssetImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingCapital



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5273666914432935760-19914732922-19825355641563875-223392618-206841570311732825851474-8214181067-787-10571062
Percentage of IncreaseDecreaseInOperatingCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaid



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1372502122731611952421941551862181621811622161491611602011591551383081682081682113152591371873396750144321130183129
Percentage of InterestPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value14254961758986928185101909697848778797568717476695961676557554776756245514126232212
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1425496175898692818510190969784877879756871747669
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-80000000.0-90000000.0-136000000.0-128000000.0-140000000.0-141000000.0-128000000.0-119000000.0-130000000.0-135000000.0-131000000.0-121000000.0-131000000.0
Percentage of NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-68-15210640218-110-5425107-13983-19873-49750-181-111611-1662-551
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-210-40-1-7260-1-1411229-4-804-177-183-35692396-1909-715
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent30.9-0.0-3.80.0-0.50.0-0.01.9-4.00.01.9-20.9-4.80.089.4-250.771.492.3-1.7-8.11.0114.9129.8
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-11017818610-1311529265-181-41-88-169
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent161.8-117.1175.525.0-6.00.0-26.4-490.7-724.00.0-82.2121.6
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0385576178-17-112-711702687-146-227654-27-8169335-26
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent-0.0-2.07.5137.534.90.0-7.331.5-448.00.0158.9-18.7104.80.011.1104.1-110.2-3.644.8-5.415.2-2.14.7
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value63-333-84-2515645-147-301319-2623-25263-574702559923-87-41-53-289-244
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent-92.6219.1-79.2-62.571.60.0133.6557.41276.00.021.518.0316.90.0-35.4349.3-202.03.148.136.9-8.717.444.3

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-23-1953444221-105-1694150-8223-14415246520-144-73276-1274-556
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-155-405-561002312-11265-529-156-115-36422583-1291-489
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent65.2-2.6-11.80.02.30.0-0.0-0.050.00.0-7.3-325.02.20.0108.3-75.7-78.381.2-3.5-11.01.1101.387.9
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-871411478-108423209-143-16-57-110
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent378.3-72.3432.418.2-4.50.0-21.9-123.7-3575.00.0-38.01375.0
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0385576178-17-112-831512980-138-257170-39-57-98320-33
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent-0.0-1.523.5125.034.40.0-7.610.1-2800.00.0100.7-362.535.90.017.446.7152.2-7.539.612.330.1-1.65.9
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value79-344-117-1915017-136-361257-226747309-6168224412193-85-17-177-316-316
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent-343.5176.4-344.1-43.267.90.0129.5213.66425.00.044.7-587.5138.60.0-56.9160.5263.017.959.023.3-64.124.856.8

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0-18-174482403-991353543-306363-67-1446-29
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value-39-60-15-11-15-40-30-36-13-47-2614410828-29-42-35463
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value79-344-117-19150-136-361257674730982244121-85-17-177-316
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-4543-22672-4-3-106-51152182-43-131-140-54-79-95230-37-38335-3885-229
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-6-5-18600-6-1650-1-399133-9-275-21-681270-213-618-226-216
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax13.3-11.682.30.0-0.0200.0155.7-0.0-0.9-14.3120.7-30.2-2.36.40.038.986.1-1.1117.45.4-2.60.9159.3-4520.094.3
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2337-23392-331656-38-25-31-59
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax51.186.010.254.2-50.0100.0-29.2-120.048.7-181.0-30.572.145.0
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value00000000001219-37-835-1612-2415101572
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax-0.00.0-0.00.0-0.0-0.0-0.0-0.00.00.014.6-44.22.3-5.00.0-5.6-6.316.85.264.9-39.53.0-3.9140.0-0.9
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-1611-1733-6628-116062-4-44-72-4642-1211-22-70-2-2412427724
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax35.625.67.545.8150.0-200.0-26.4220.052.2295.2-4.9102.355.032.90.022.2-13.923.2-30.45.463.237.0-7.01440.0-1.7

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-12010491-52-4827266-70-66-143
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:ForeignExchangeContract


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-109178-9618610-1311529264-181-42-88-169
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:InterestRateSwap


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1-10-1-1-4-1-1-1-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.9-0.6-0.0-0.5-10.030.8-0.9-3.4-0.40.6

us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:ForeignExchangeContract


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-42-46-66-70-75-44-126739319-13-49
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax

mrk:EurodominatedNotes


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-7251-77150-2830129-38271-178
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:ForeignExchangeContract


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-8318-1-1711-610122
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax11.15.9-23.4-0.760.736.7-4.7-26.34.4-1.1

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax

us-gaap:ForeignExchangeContract, us-gaap:OtherNonoperatingIncomeExpense


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4888884430
Percentage of OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-2-198-803-28-16199-394-29-6212435149-14146-974-166108-46425-241-165156-1325-554
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3960-746151115-531403036333134726-519-144-108-28473294235-1282-463
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-1950.0-30.392.9-53.6-68.87.5134.8-137.9-48.429.0951.48.7-335.717.853.386.7-100.060.9111.3-12.0-25.522.496.883.6
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-120104-12691-52-487427266-70-5-66-143
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent6000.0-52.515.7-325.0325.0-24.1-18.8-93.1-429.0-56.5-14.3-44.31021.4
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0-18-13-17448246403-99-2711353543-140-306363-35-67-144624-29
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-0.09.11.660.7-275.041.2-11.7-137.9-4.8-79.8-774.390.6-250.029.514.418.158.3-137.0-8.227.88.529.5-1.85.2
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value79-34482-117-1915017-136-361257-226747309-6168224412171-85-17-177-316-316
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-3950.0173.7-10.2417.9118.875.4-4.3469.0582.3207.3-62.945.0-335.7211.663.2-49.4225.9-263.016.735.310.3-113.523.857.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value345-14335-1056-120-393-156-379-50-30094-9128-66-50-100-97-60-120-26-55145-14277115-326-62177-72-71-530-249234222-150183
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-59-136-58-235-47-38-252-124526983-59-11452-47543-1078618-140-1252-1446106-58-47-120-32-32112662919-17-108-14-11
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value201290105153102101182200302203159162180221309140137174
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve

us-gaap:OneTimeTerminationBenefits


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value16016812772576911414625013910457641031626677108
Percentage of PaymentsForRestructuring79.657.9121.047.155.968.362.673.082.868.565.435.235.646.652.447.156.262.1
us-gaap:OtherRestructuring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value41122-228145326854526455105116118147746066
Percentage of PaymentsForRestructuring20.442.1-21.052.944.131.737.427.017.231.534.664.864.453.447.652.943.837.9

us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

mrk:Themis


Period End2020-06-30
Value366
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312011-12-312011-09-302010-12-312010-09-30
Value-2224254525-1270059037204904130626211014736-748807598-35193700002460010411
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName, us-gaap:StatementScenario

us-gaap:PaymentsToAcquireIntangibleAssets

mrk:Eisai, srt:ScenarioForecast


Period End2021-03-312020-03-31
Value125200
Percentage of PaymentsToAcquireIntangibleAssets100.0100.0
mrk:Eisai, us-gaap:ScenarioForecast


Period End2021-03-312021-01-312020-03-312020-01-312019-03-312019-01-31
Value125125200200325325
Percentage of PaymentsToAcquireIntangibleAssets100.00.0100.00.00.00.0

us-gaap:PaymentsToAcquireMarketableSecurities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value28498225708369741095165139221326234221173351292955673729398823674256380435825039871338515555682540105950289012762725263916201684138213711591
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6689861137959782595929653583450715441393339551409375279493316271203490320302205351778414431331603431365324660338337343
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-128-316245-33-115-92-36-12-194-83-28-81-63-23-1-8-99-101-38101-813623490-1140-510-339-4-22416785-76-53-62
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value76181611632524303618994009384055551848313131702544681930533912276846203882390363416287330737055470263231612176143313772797140918501366152483520261427273
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfIntangibleAssets



Period End2020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1075015141050212510050950075
Percentage of ProceedsFromSaleOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value14261740131173130162692301873953131494091792025157135242179247203931922504592223791273212537507642195
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-27-1757328-84-132-1457151243969147165141144173825
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-69-69-21-14-14-42-47-40-41-31-31-27-28-12-11-7-7-49-46-54-54-8-34
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent255.66900.0-28.0-19.2-50.00.056.030.328.30.0-442.9-180.0-22.60.0-28.2-10.1-4.8-29.7-32.6-37.5-31.2-9.8-680.0
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value424771764812-5-72-92-181450
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-155.6-4700.094.7104.1171.40.06.054.563.40.0200.0333.3
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0212511-6-29-32-20-1221824-857551011-516656-8-5
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-0.0-2100.033.315.1-21.40.038.115.28.30.0342.9-53.346.00.012.814.57.5-3.011.34.232.4-9.8-100.0
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value000000000000000002200000
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-0.0-0.00.00.00.00.0-0.0-0.0-0.00.00.00.00.00.00.00.00.013.30.00.00.00.00.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-213626022-76-107-120167722449295979212051-2
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-54-55-19-11-10-30-40-30-34-21-24-21-21-10-12-7-8-51-24-34-32-9-26
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent257.1-1833.3-30.6-18.3-45.50.052.628.028.30.0-2400.0-350.0-27.30.0-54.5-15.9-8.7-53.7-24.7-37.0-26.7-17.61300.0
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value333756603810-4-57-73-11933
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent-157.11233.390.3100.0172.70.05.353.360.80.0900.0550.0
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0212511-6-29-32-20-1318816-6372587-410537-4-4
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent-0.0700.040.318.3-27.30.042.118.710.80.01600.0-100.048.10.022.718.27.6-4.210.35.430.8-7.8200.0
us-gaap:AccumulatedTranslationAdjustment


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value000000000000000002200000
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent-0.00.00.00.00.00.0-0.0-0.0-0.00.00.00.00.00.00.00.00.023.20.00.00.00.0-0.0

us-gaap:ReclassificationFromAociCurrentPeriodTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-6-4813136-10-8-25-2513694717255570445253317-12
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-15-14-6-2-3-4-12-7-10-7-10-7-6-7-21012-22-20-221-80
Percentage of ReclassificationFromAociCurrentPeriodTax250.0350.0-75.0-15.4-23.1-66.7120.087.540.028.0-76.9-116.7-66.7-14.90.05.90.01.82.9-50.0-38.5-41.53.2-114.3-0.0
us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value910141516102-1-15-19-7517
Percentage of ReclassificationFromAociCurrentPeriodTax-150.0-250.0175.0115.4123.1166.7-20.012.560.076.0-53.883.3188.9
us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0000000001308-2203024-16119-4-1-13
Percentage of ReclassificationFromAociCurrentPeriodTax-0.0-0.00.00.00.00.0-0.0-0.0-0.0-4.0230.8133.3-22.242.60.00.08.07.3-1.413.61.935.8-12.9-14.3108.3

us-gaap:RestructuringAndRelatedCostIncurredCost



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value150168285296159187150169235104322180210215310212351196340217328225619612421326967278194258163287291690275809116344383896
Percentage of RestructuringAndRelatedCostIncurredCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value837219423259153138171228953061531661512651611349123311319182349376163125870155119191110144219533119668-1412150526288
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value837219423259153138171228953061531661512651611349123311319182349376
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-0.430000000000006875.65-6.5999999999999940.00.090.50.469999999999998860.00.1000000000000014256.60.00.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:RestrictedStockUnitsRSU


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-7.92000000000000285.660.049999999999997163.719999999999999-1.079999999999998377.390.27000000000000310.039999999999999152.26999999999999655.88-0.10999999999999943-0.00999999999999801
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue1841.9113.2-0.8100.0100.085.557.4100.02270.098.7100.0100.0

us-gaap:StockholdersEquityOther



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value13-107-124-127-117-243-216-252-103-2911352-140-115-3682049-491-174-2451310-128-143-306
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value324-37-99-7728440-46-2113328-153-4712340-6081423477-444-5424968
Percentage of StockholdersEquityOther2492.334.679.860.6-242.7-16.521.38.3-129.1-9.6-11.333.6-107.0-10.9-29.7-2.9-134.5-31.4-33.942.2-174.1-22.2
us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-311-70-25-50-401-283-170-231-236-3191505-93-238-4082657-505-408-3221754-79-387-374
Percentage of StockholdersEquityOther-2392.365.420.239.4342.7116.578.791.7229.1109.6111.366.4207.0110.9129.7102.9234.5131.4133.961.7270.6122.2

us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOtherShares

us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value511855551571096287
Percentage of StockholdersEquityOtherShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value016121724146916271031218161614121822241217284639211426101412173209
Percentage of TreasuryStockSharesAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value0128110501405123510905933996159656617021591134101910168456609131181128170910151620267022461167580115245452945656210450296
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value0128110501405223510904933996159656617021591134101910168456609131181128170910151620267022461167580115245452945656210450296
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0181.0100.083.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value91414141816131501821212121222430323237333331343131212420242027
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

mrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredLiabilitiesAssumedOtherAssetsAndLiabilitiesNet

mrk:Themis


Period End2020-06-30
Value-22
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredLiabilitiesAssumedOtherAssetsAndLiabilitiesNet100.0

mrk:DebtSecuritiesandEquitySecuritiesFVNI



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value138384326232806487969797717
Percentage of DebtSecuritiesandEquitySecuritiesFVNI100.0100.0100.0100.0100.0100.0100.0

mrk:InventoryNetAndInventoryNoncurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7977747674587370731171106857671065396518628362926483623659836348644363606269665770307117723575937759786979308215828182188141817777397768763376217633732170629205
Percentage of InventoryNetAndInventoryNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementScenario

mrk:LesseeOperatingLeaseLeaseNotyetCommencedAmount

srt:ScenarioForecast


Period End2020-04-30
Value221
Percentage of LesseeOperatingLeaseLeaseNotyetCommencedAmount100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value908986116122116119229210205210222200195195173167186165163149141153186167171146140137144163163144142131129128111104113
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312011-06-302010-12-31
Value1381841898752814692511432439343293298
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312011-06-302010-12-31
Value3307122013253743666671766010509129671497042753974
Percentage of AssetsFairValueDisclosure23.984.7224.2337.4536.4964.01499.02432.62953.84364.41459.01333.6
us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312011-06-302010-12-31
Value0000000000013
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.04.4

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312011-06-302010-12-31
Value171115532911328951807363817110941134061531345684285
Percentage of AssetsFairValueDisclosure123.9184.7324.2437.4636.41064.01599.02532.63053.84464.41559.01437.9

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0017315030633411
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00134311111
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.05.99.78.010.016.733.333.325.09.1
us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value001324362232239
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.076.577.472.073.350.066.766.775.081.8
us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value003410520000
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.017.612.920.016.733.30.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00003258512716817279
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000015111316177
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.033.320.012.910.29.59.98.9
us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000219688812212140
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.066.776.080.069.372.670.350.6
us-gaap:ForeignGovernmentDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000000189106
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.00.00.01.26.35.45.87.6
us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000001517202317
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.00.04.05.913.411.913.421.5

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value76641768208440766338734010300127521437414976
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00226434789109612851300145615851548
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.012.820.819.417.317.512.611.411.010.3
us-gaap:CommercialPaper


Period End2020-06-302020-03-312019-12-312018-12-31
Value006680
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.037.80.0
us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0060812602666430749856952890299789837
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.034.460.565.468.067.967.569.869.465.7
us-gaap:ForeignGovernmentDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value220324199167546658769739
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis2.63.10.01.51.01.62.35.35.25.34.9
us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value74622663585758288951448164018332059
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis97.496.915.017.214.113.112.214.112.912.813.7

us-gaap:AvailableForSaleSecuritiesDebtSecurities



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value76641785211541236343726110176125871420614908
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000000000068
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.5
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00227437788106912531271139415171476
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.012.720.719.116.917.312.511.110.79.9
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Period End2020-06-302020-03-312019-12-31
Value00668
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.037.4
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0062112842660423148356765868497419678
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.034.860.764.566.766.666.569.068.664.9
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value220324199166538649759732
Percentage of AvailableForSaleSecuritiesDebtSecurities2.63.10.01.51.01.62.35.35.25.34.9
us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value002093015087357311265139615851767
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.011.714.212.311.610.112.411.111.211.9

us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00227437788106912531271139415171476
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.012.720.719.116.917.312.511.110.79.9
us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Period End2020-06-302020-03-312019-12-31
Value00668
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.037.4
us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0062112842660423148356765868497419678
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.034.860.764.566.766.666.569.068.664.9
us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value220324199166538649759732
Percentage of AvailableForSaleSecuritiesDebtSecurities2.63.10.01.51.01.62.35.35.25.34.9
us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value002093015087357311265139615851835
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.011.714.212.311.610.112.411.111.212.3

us-gaap:FinancialInstrument

us-gaap:AssetBackedSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00227437792109412751288144115691542
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.012.720.719.217.217.612.711.411.010.3
us-gaap:CommercialPaper


Period End2020-06-302020-03-312019-12-312018-12-31
Value006680
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.037.40.0
us-gaap:CorporateDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0062112842700431049206866878298609806
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.034.860.765.567.967.867.569.869.465.8
us-gaap:ForeignGovernmentDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value220324199166538649759733
Percentage of AvailableForSaleSecuritiesDebtSecurities2.63.10.01.51.01.62.35.35.25.34.9
us-gaap:USGovernmentAgenciesDebtSecurities


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value74622693625858328921431162018102042
Percentage of AvailableForSaleSecuritiesDebtSecurities97.496.915.117.114.213.112.314.112.912.713.7

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

mrk:Themis


Period End2020-06-30
Value740
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0

us-gaap:BusinessAcquisition, us-gaap:ContingentConsiderationByType

mrk:Themis, mrk:DevelopmentMilestones


Period End2020-06-30
Value80
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh10.8
mrk:Themis, mrk:RegulatoryMilestones


Period End2020-06-30
Value260
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh35.1
mrk:Themis, mrk:SalesBasedMilestones


Period End2020-06-30
Value400
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh54.1

us-gaap:BusinessCombinationContingentConsiderationLiability



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value79869476775575366778885283091993594510029258918946616525906145775624287573716949
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType

mrk:SanofiPasteur


Period End2020-06-302020-03-312019-12-312018-12-31
Value608520625614
Percentage of BusinessCombinationContingentConsiderationLiability76.274.981.577.9

us-gaap:BusinessAcquisition

mrk:Themis


Period End2020-06-30
Value97
Percentage of BusinessCombinationContingentConsiderationLiability12.2

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value798694767755753667788852830919935945100292589189466165259061457756242869
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value798694767755753667788852830919935945100292589189466165259061457756242869
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

mrk:Themis


Period End2020-06-30
Value62
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets

mrk:Themis


Period End2020-06-30
Value136
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CashEquivalentsAtCarryingValue

us-gaap:FairValueInputsLevel2


Period End2020-06-302020-03-312019-12-31
Value1040068008900
Percentage of CashEquivalentsAtCarryingValue100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount



Period End2020-06-302019-03-312016-11-302015-02-282014-10-31
Value45005000100080002500
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

mrk:A0.75notesdue2026


Period End2020-06-30
Value1000
Percentage of DebtInstrumentFaceAmount22.2
mrk:A1.45notesdue2030


Period End2020-06-30
Value1250
Percentage of DebtInstrumentFaceAmount27.8
mrk:A1.85NotesDue2020


Period End2020-02-29
Value1250
Percentage of DebtInstrumentFaceAmount0.0
mrk:A2.35notesdue2040


Period End2020-06-30
Value1000
Percentage of DebtInstrumentFaceAmount22.2
mrk:A2.45notesdue2050


Period End2020-06-30
Value1250
Percentage of DebtInstrumentFaceAmount27.8

us-gaap:DebtInstrumentFairValue



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value34500306002880028700286002710025600240002390024300256002830026000293002570027000262002720027000272002690031600225002900024200289002550027300290002280022800221002120020000195001970018800183001870017700
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value309002800026300261002660025100
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value209119431470196020891835170220652159220622195077
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndOtherAssetsCurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value46074714427738273382323345003761400541124299379033544069438937653928387751404941513351175257474036593939478952774352448445093429378837133694415836873651
Percentage of DeferredIncomeTaxesAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndOtherAssetsNoncurrent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value75997052677190049155870775547500714565586075588459285872585464436559592161445618584355965133658971438831911570107112689167236135615659135735556955345626
Percentage of DeferredIncomeTaxesAndOtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value17540517027720019222619820263376143263335271270372316390340
Percentage of DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetNotOffsetPolicyElectionDeduction



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value11589847369155121135152103941371321441315047112593197
Percentage of DerivativeAssetNotOffsetPolicyElectionDeduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value32871