WST


Line plots across dimensions of each concept
Tables

Table of contents



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

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

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

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

us-gaap:GrossProfit

us-gaap:ResearchAndDevelopmentExpense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments

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

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

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

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

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:DebtCurrent
us-gaap:LongtermDebtType

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
us-gaap:LongtermDebtType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

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

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:RepaymentsOfLongTermDebt

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

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:AdjustmentForAmortization

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1
us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:DefinedBenefitPlanActuarialGainLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanSponsorLocation
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost
us-gaap:RetirementPlanType

us-gaap:Depreciation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
us-gaap:IncomeStatementLocation
us-gaap:GainLossOnDerivativeInstrumentsNetPretax

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

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InvestmentIncomeNet

us-gaap:LeaseCost

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

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

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:RestructuringPlan
us-gaap:OtherRestructuringCosts

us-gaap:PaymentForContingentConsiderationLiabilityOperatingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:RestructuringCostAndReserve
us-gaap:PaymentsForRestructuring
us-gaap:RestructuringPlan

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLongTermLinesOfCredit
us-gaap:RestructuringPlan
us-gaap:RestructuringCharges

us-gaap:RestructuringReserveSettledWithoutCash2

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:RestructuringPlan
us-gaap:SeveranceCosts1
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:VariableLeaseCost

wst:Developmentandlicensingincome
us-gaap:NatureOfExpense

wst:OtherIncomeExpense

wst:Pensionsettlementcharge

wst:PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees

wst:SalesToEquityMethodInvestees

dei:EntityCommonStockSharesOutstanding

us-gaap:AdditionalPaidInCapital

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability
us-gaap:ProductOrService

us-gaap:CostMethodInvestments

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
us-gaap:StatementEquityComponents

us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DeferredCompensationPlanAssets
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:Position
us-gaap:DerivativeNotionalAmount

us-gaap:DueFromAffiliates

us-gaap:DueToAffiliateCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EquityMethodInvestments

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherAssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringReserve
us-gaap:RestructuringPlan

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:TransferOfFinancialAssetsAccountedForAsSalesCashProceedsReceivedForAssetsDerecognizedAmount

us-gaap:TreasuryStockShares

us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:MeasurementInputType
wst:BusinessCombinationContingentConsiderationMeasurementInput
us-gaap:Range, us-gaap:MeasurementInputType

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:CommonStockValue █████████████████████▁▁▁▁▁1818181818181818181818181818181818181818181717171717NANANANANANANANA8NANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█████████████████▇▇▇▇▇▇▇▇▇▁▁▁▁▁▁7575757575757575757575747473737373727272727171707069343434343434NA3434NANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock▄▄▄▄▄▄▄▄▄▄1111111111NANANA0NANANA0NANANA0NANANANANA00000NA0-1NANA
us-gaap:CommonStockSharesIssued ███████████▇▇▆▆▆▆▄▄▄▄▃▃▂▂▁7575757575757575757575747473737373727272727171707069NANANANANANANANA34NANA
us-gaap:CommonStockSharesOutstanding ▇██▇▇██▇▇▇██▇▇▇▇▇▅▅▅▄▄▄▂▂▁7374747373747473737374747373737373727272717171707069NANANANANANANANA33NANA
us-gaap:CommonStockSharesAuthorized ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄100100100100100100100100100100100100100100100100100100100100100100100100100100NANANANANANANANA50NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 75NA757575NA757575NA757574NA757474NA737373NA727272713535343637373736NA3636
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 73NA747374NA737373NA747373NA737372NA727271NA717070693434343433333333NA3333
us-gaap:EarningsPerShareBasic █▇▆▇▆▆▆▆▅▁▆▅▇▅▅▅▃▄▁▄▄▄▄▅▄▄▇▇▄▄▇▄▅▅▂▅▅1.010.87000000000000010.760.90.750.69999999999999970.750.760.590.00.690.530.830.530.510.610.310.47000000000000010.020.390.460.439999999999999950.440.530.380.380.870.920.430.460.860.50.60.590.179999999999999940.530.6
us-gaap:EarningsPerShareDiluted █▇▆▇▆▆▆▆▅▁▆▅▇▅▅▅▃▄▁▄▄▄▄▅▄▄▇▇▄▄▇▄▅▅▂▅▅0.990.85000000000000010.750.880.730.69000000000000040.730.750.580.00.670.510.810.510.50.60.30.450000000000000070.020.380.450.429999999999999940.430.520.380.370.860.90.430.450.810.490.570.560.189999999999999950.510.57
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:Revenues █▇▇▇▆▆▆▇▆▆▅▅▅▅▄▅▄▄▃▄▃▃▄▄▃▃▃▃▂▃▂▂▂▂▁▁▁491470456469443422431447415415398397387382376388362359344359335349355368346341344339303324316293307295276271274
 us-gaap:Revenues us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ForeignExchangeContract,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges█▇██▇▆▆▃▁▂▂300000.0200000.0300000.0300000.0200000.0100000.0100000.0-300000.0-600000.0-500000.0-500000.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments wst:DeliverySystems118NA111109103NA10610189NA898479NA797771108971009310310410194909388888980848680NA81NA
 us-gaap:Revenues us-gaap:StatementBusinessSegments wst:PackagingSystems373NA345360340NA325346326NA308312308NA298311290251247259242247251268252251251251215235235209222215NANANA
us-gaap:CostOfGoodsAndServicesSold ██▇▇▇▆▇▇▆▆▅▅▄▄▄▄▃▄▃▄▃▄▄▄▄▃▃▃▂▃▂▂▃▂▁▁▁324317308311296289296305281287273272253258255254238240236241226240246247240236233227213226215212223207198196192
us-gaap:GrossProfit █▇▆▇▆▅▆▆▆▅▅▅▆▅▅▅▅▄▄▄▄▄▄▅▃▃▄▄▂▃▃▂▂▂▁▁▂1671531471571461331351421341281251251341231211331231191081181091091091211061051101119098101818488787482
us-gaap:ResearchAndDevelopmentExpense ██▇▇▇▇██▇▇▇██▇▇▅▇█▅▅▄▄▇▇█▇▇▇▅▅▅▄▄▂▂▁▁101099991010999101099891088779910999888776655
us-gaap:SellingGeneralAndAdministrativeExpense █▇▆█▇▅▆█▇▅▅▅▅▅▅▆▅▆▄▅▄▅▄▄▄▄▅▅▃▄▃▁▂▃▃▁▂71696470685964706858616061605862586254605558565756565959535451454650504446
us-gaap:OperatingIncomeLoss █▇▆▇▇▆▆▆▅▆▆▄▆▅▅▆▄▅▁▄▅▅▅▅▄▄▄▅▃▄▄▃▃▃▂▃▃887867807065606053616342615451613045-339474444543939424326354126272852528
 us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments wst:DeliverySystems12NA111110NA1199NA10108NA89771405430021452121NA3NA
 us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments wst:PackagingSystems93NA728877NA687162NA675664NA5766615656616055526251545658395053343842NANANA
us-gaap:InterestExpense ▃▃▃▃▃▃▃▃▁▃▁▃▃▁▃▃▃▃▆▆█▆███████████████2222222212122122223343444444444444444
 us-gaap:InterestExpense us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:TreasuryLock,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges▃▄▃▃▃▃▃▃▃▃▃▃▃▄▃▃▃▂▃▃▁█▁▂▃▂▁▂100000.0200000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0100000.0100000.0100000.00.0100000.0100000.0-100000.0700000.0-100000.00.0100000.00.0-100000.00.0NANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▄▄▁▄▄████▄█▄▄00-10011110100NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▂▇▄▅▆▅▅▂▇▆▇█▆▃▆▅▆▄▄▆▁▃▂▅▅▆▅▄▆▃▆▃▆-4725-23040-9-4920422365-345-414-12-1311-56-29-38-1-1140-1816-2912-2510NANANANA
us-gaap:IncomeTaxExpenseBenefit ▃▃▃▃▃▃▂▂▃█▃▂▂▃▃▃▂▃▁▃▃▃▃▃▃▃▃▂▃▂▃▂▂▂▁▂▂1516101516148612611422161417611-6912111114910108969656-346
us-gaap:ProfitLoss █▇▆▇▆▆▆▆▅▁▆▅▇▅▄▅▃▄▁▄▄▄▄▄▄▃▄▄▂▂▄▃▃▃▂▃▃74635666555255564305138603937442233127323131372726303114152916201961719
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings74NA56665552555643051386039374422331273231313727NANA31NA1529NANA19NANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▄█▅▇▆▆▅▃▇▃▇▇▇▂▅▅▅▄▃▅▁▁▂▅▄▆▄▃▄▁▅▂▄▅▂▆3184386756514586513726668-344423625737-18-16-5362548311531-1442-73040255NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:Assets ▇█▇▆▆▅▅▅▄▄▅▄▃▃▄▃▃▃▃▃▂▃▃▃▃▃▃▂▂▁▁▁22462341217421232036197819461873186918621930184317331716173517051668169516661663159616701673170417081664161215771527146214571398NA13661294NANA
us-gaap:Liabilities ▆▆▄▄▄▁▂▂▁▁▂▂▁▂▂▂▂▄▄▄▃▅▅▅▆███▇▇▆▅756768686678666582594591564582613600564599593595594671671674654714703732773827828831810783762707NA703668NANA
us-gaap:LiabilitiesAndStockholdersEquity ▇█▇▆▆▅▅▅▄▄▅▄▃▃▄▃▃▃▃▃▂▃▃▃▃▃▃▂▂▁▁▁22462341217421232036197819461873186918621930184317331716173517051668169516661663159616701673170417081664161215771527146214571398NA13661294NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:AssetsCurrent ▇█▇▇▆▆▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▁▁▁97710581004944867894850766743743776717652641658659630673680679625659679685686643613589557517502503NA481436NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆█▇▆▅▆▅▄▄▄▅▄▃▄▄▄▃▅▅▄▄▅▄▄▄▄▃▃▂▂▂▂▂▂▂▂▁335439396326265337297225199235269226169203205202178274256252207255246226230221190175143107100119110941109765
us-gaap:AccountsReceivableNetCurrent █▇▇█▇▆▇▇▆▅▅▄▄▃▃▄▃▂▃▃▂▂▃▃▃▃▃▂▂▂▂▁333319316330318288302296290253251242224200209219209181194198189179195209208198195189182185176153NA161126NANA
us-gaap:InventoryNet █▇▆▇▆▅▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▁▁▁251235230232226214206208215215215211212199201197194181187187183181185187187176176173165159158155NA157147NANA
us-gaap:OtherAssetsCurrent ▇█▇▆▆▆▄▂▂▃▃▂▄▃▃▃▅▂▂▂▂▂▁▄▄▁▂▂▂▁▂█5864615457544336373940374639413948363333363532444430333536323465NA5642NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross ████▇▇▇▇█▇▇▆▆▅▅▅▅▄▄▄▃▄▄▄▄▃▃▂▂▂▂▁18161820177917861759175217451737177517451701164615831554155114981482144013981380134913901381140213851328128912711226118511841135NA11271077NANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ████▇▇▇▇▇▆▆▅▅▅▅▄▄▄▃▃▃▃▃▃▃▂▂▂▁▁▁▁988980967963945930923910917890865834800776778757750719708694673685686693673646625612589565565559NA552522NANA
us-gaap:PropertyPlantAndEquipmentNet ▇█▇▇▇▇▇▇██▇▇▆▆▆▅▅▅▄▄▃▄▄▄▄▄▃▃▃▂▂▁828839812822814822822826857855835811782778772741732721689685675705694709712682663658637620619576NA574554NANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ██▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁197192979594919091898584838182817761615959596061605959585560575855NA4848NANA
us-gaap:Goodwill ▃▄▃▄▂▂▃▃▄▄▄▂▁▁▂▂▂▂▂▂▂▄▅██▇▆▆▆▅▇▇106107106108105105106106108107107105103103105104105104105105104108110114114113111111111110112113NA115112NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▃▃▃▃▁▁▁▁▂▁▂▂▂▂▂▂▂▅▅▅▅▆▆▇▇▇▇▇█▇██2829282919202121222122222323242425373839404243464748494950495152NA5555NANA
us-gaap:OtherAssetsNoncurrent ▄▅▃▃▆▃▄▄▄▅▁▁▄▄▄▄▅▆▆▇▇▇▄▅▅▆▆▅▅▅▇█2224202026202121212316162121222224262527272822242325252424242829NA2222NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:LiabilitiesCurrent ███▆▆▅▅▅▄▅▆▅▃▃▂▃▃▆▆▆▆▃▃▂▂▃▂▁▄▇▆▂344341335313301283288287263279300289256241236239241314299313296252242221227246218208275320302229NA182169NANA
us-gaap:DebtCurrent ▁▁▁▁▁▁▁▁▁▁▃▃▃▁▁▁▁▆▆██▃▃▁▂▂▁▁▄▇▇▅22000000003333342222697195982727214180139898654NA60NANA
 us-gaap:DebtCurrent us-gaap:LongtermDebtType wst:TermLoanDue20242NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsPayableCurrent ██▇█▆▆▅▅▆▆▅▆▄▅▃▄▃▅▃▃▂▄▃▃▃▂▂▃▂▂▂▁157156145152137130125126127138121130106122991079711993918810391949886889181858271NA6663NANA
us-gaap:AccruedIncomeTaxesCurrent ▄▂▆▂▅▃▅▅▄▂▂▁▂▂▁▃▅▄▆▆▅▄▆▅▄█▇▅▆▄▄▂13619517917171367264391712191815141815122624161914137NA65NANA
us-gaap:OtherLiabilitiesCurrent █▇▇▇▆▆▆▇▅▆▅▅▄▄▅▄▆▃▄▃▃▃▃▃▄▃▂▂▅▅▅▁9791868480767686697772716358675974535753535152555848454570716932NA4040NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:LongTermDebt ██▁▁▁▁▁▁256257195196195196196196NA197NANANA228NANANA298302326330336342361404400394430401385289NANANANANANA
us-gaap:LongTermDebtNoncurrent ▃▃▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▄▅▆▇▇▇█▆▄▄▅254255195196195196196196198197196195194226228228229228231231231309315359390381394428362296294323NA364358NANA
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType wst:TermLoanDue2024▄▄8787NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▁▁▁▂▂▂▂▂▂▂▂▂▂▃▂▂▂▂▄▂▂▄▃▄▄▇██▆▆▆▄5052465354565353555362605775626160628163618375798212613813511411211184NA9187NANA
us-gaap:OtherLiabilitiesNoncurrent ▃▃▂▂▁▁▄▄▂▄▅▅▅▅▆▆▆▇▅▆▆▇▆▇▇▇█▃▂▂▁▆4041353534334342354246464747495149534849495251525254573937353350NA4333NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:CommonStockValue █████████████████████▁▁▁▁▁1818181818181818181818181818181818181818181717171717NANANANANANANANA8NANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▇▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁1611154914971452139813531312125812221178118811481118107110411013978964939947927902878855825788NANANANANANANANA612NANA
us-gaap:TreasuryStockValue █▅▅▆▇▄▄▆▆▄▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁21511812614717210310815514910962646546211312444444443NANANANANANANANA41NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▃▂▃▃▃▃▃▅▄▄▃▂▁▃▃▃▂▃▂▂▄▆██▆▅▅-192-149-170-152-153-154-153-143-95-117-130-151-179-186-143-150-148-162-154-160-170-119-71-34-33-69-91-92NANANANANANA-31NANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges█▇█▇▅▇▇▇▆▄▄▄▇▅▆▆▅▅▆▆▇▄▄▄▄▂▂▁101-1-30-1-1-2-4-5-4-1-3-2-2-3-3-2-20-4-4-5-5-7-8-9NANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss▁▁▁▁▁▁▁▁▁▁▁▁██████▇▇▇▇▇▇▇▁▁▁0000000000005555554444444000NANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅███▄▆▇▆▄▆▆▇▂▆▅▆▁▅▅▆▁▄▅▅▂571061081054773888245817585207168763686877-14663648NANA18NA52133939947NA11
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▁▇▆▇▇▇█▇▇▇▇▇▆▆▆▇▆▇▇▇▇██▇-31-120-31-47-28-28-26-17-28-29-34-35-34-46-47-42-38-43-29-25-30-26-20-21-35NANA-57NA-35-31-32-23-29-18NA-19
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▆▆▂▆▆▅▄▂▆▆▅▅▅▆▃▆▅▆▆▆▆▄▇-1205103-90-810-25-56-86-32-21-26-15-7-65-1-30-101-1-10-4526NANA55NA-5246-20-14NA-5
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅███▄▆▇▆▄▆▆▇▂▆▅▆▁▅▅▆▁▄▅▅▂571061081054773888245817585207168763686877-14663648NANA18NA52133939947NA11
us-gaap:ProfitLoss █▇▆▇▆▆▆▆▅▁▆▅▇▅▄▅▃▄▁▄▄▄▄▄▄▃▄▄▂▂▄▃▃▃▂▃▃74635666555255564305138603937442233127323131372726303114152916201961719
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings74NA56665552555643051386039374422331273231313727NANA31NA1529NANA19NANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▄▄▄▄▂▄▄▄▅▄▄▄▂▄▄█▁▅▄█▂▄▄▇4-10000-320027003-33-9060-556-1261-43-7043NANA37NA036NA64-31NANA-27
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▁▇▆▇▇▇█▇▇▇▇▇▆▆▆▇▆▇▇▇▇██▇-31-120-31-47-28-28-26-17-28-29-34-35-34-46-47-42-38-43-29-25-30-26-20-21-35NANA-57NA-35-31-32-23-29-18NA-19
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▅▄▃▃▄▂▁▃▃▄▃▅██▅▆▇▃▂▄▃▃▂▄32373128283026202829342937474835394429263027282431NANA61NA373224181921NA17
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▆▆▂▆▆▅▄▂▆▆▅▅▅▆▃▆▅▆▆▆▆▄▇-1205103-90-810-25-56-86-32-21-26-15-7-65-1-30-101-1-10-4526NANA55NA-5246-20-14NA-5
us-gaap:RepaymentsOfLongTermDebt 600000.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock █▁▁▁▆▁▁▂▄▄▁▁▃▃▂▁▂▁▁▁▁11500083002247470026259890000NANANANANANANANA100120NA2
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
us-gaap:RepaymentsOfLongTermDebt 600000.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value1818181818181818181818181818181818181818181717171717178888
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.90.90.91.01.01.01.01.01.01.01.11.11.11.11.11.11.11.11.11.11.11.01.01.11.10.50.60.70.7

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value75757575757575757575757474737373737272727271717070706934343434343434343434343434
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value1111111111000000000000-1-1-1-2
Percentage of SharesIssued2.31.61.72.12.41.61.62.42.31.70.80.10.10.30.30.3-0.6-0.9-1.5-1.7-1.7-2.6-2.9-3.8-4.7-6.1

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value75757575757575757575757474737373737272727271717070706934343434
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value73747473737474737373747473737373737272727171717070706934333333
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value10010010010010010010010010010010010010010010010010010010010010010010010010010010050505050
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-03-31
Value757575757575757575747574747373737272727135353436373737363636
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-03-31
Value737473747373737473737373727272717170706934343434333333333333
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value1.010.87000000000000010.760.90.750.69999999999999970.750.760.590.00.690.530.830.530.510.610.310.47000000000000010.020.390.460.439999999999999950.440.530.380.380.870.920.430.460.860.50.60.590.179999999999999940.530.6
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value0.990.85000000000000010.750.880.730.69000000000000040.730.750.580.00.670.510.810.510.50.60.30.450000000000000070.020.380.450.429999999999999940.430.520.380.370.860.90.430.450.810.490.570.560.189999999999999950.510.57
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value491470456469443422431447415415398397387382376388362359344359335349355368346341344339303324316293307295276271274
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value300000.0200000.0300000.0300000.0200000.0100000.0100000.0-300000.0-600000.0-500000.0-500000.0
Percentage of Revenues0.10.00.10.10.00.00.0-0.1-0.1-0.1-0.1
Percentage of Revenues0.10.00.10.10.00.00.0-0.1-0.1-0.1-0.1
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302011-09-302010-09-30
Value000000000000000000000000-1
Percentage of Revenues-0.00.0-0.00.0-0.0-0.00.00.00.00.0-0.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.10.0-0.4
Percentage of Revenues-0.00.0-0.00.0-0.0-0.00.00.00.00.0-0.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.1-0.1-0.10.0-0.4
Percentage of Revenues us-gaap:IntersegmentElimination100.00.0100.00.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

wst:DeliverySystems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value1181111091031061018989847979777110897100931031041019490938888898084868081
Percentage of Revenues24.024.423.323.224.722.721.522.421.420.421.019.919.830.228.328.027.829.429.327.427.126.627.126.029.027.525.528.828.127.329.8
Percentage of Revenues24.024.423.323.224.722.721.522.421.420.421.019.919.830.228.328.027.829.429.327.427.126.627.126.029.027.525.528.828.127.329.8
Percentage of Revenues wst:DeliverySystems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wst:PackagingSystems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value373345360340325346326308312308298311290251247259242247251268252251251251215235235209222215
Percentage of Revenues76.075.776.776.875.377.378.577.678.779.679.180.280.369.971.872.272.270.670.772.672.973.673.074.171.172.674.571.272.273.1
Percentage of Revenues76.075.776.776.875.377.378.577.678.779.679.180.280.369.971.872.272.270.670.772.672.973.673.074.171.172.674.571.272.273.1
Percentage of Revenues wst:PackagingSystems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value324317308311296289296305281287273272253258255254238240236241226240246247240236233227213226215212223207198196192
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues66.067.467.666.466.968.568.668.267.769.168.668.665.467.767.965.665.966.868.667.167.368.669.167.069.369.167.867.170.269.668.072.372.570.271.872.570.1

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

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



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value00000000000000000-100000001-11
Percentage of CostOfGoodsAndServicesSold-0.0-0.1-0.1-0.1-0.1-0.10.00.00.20.20.20.00.0-0.10.00.00.0-0.50.20.20.20.00.10.00.00.6-0.60.4
Percentage of Revenues-0.0-0.0-0.1-0.1-0.0-0.00.00.00.10.10.10.00.0-0.10.00.00.0-0.40.10.10.10.00.10.00.00.4-0.40.3
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges-33.3-100.0-100.0-100.0-100.0-200.00.0-33.3-100.0-120.0-100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value1671531471571461331351421341281251251341231211331231191081181091091091211061051101119098101818488787482
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues34.032.632.433.633.131.531.431.832.330.931.431.434.632.332.134.434.133.231.432.932.731.430.933.030.730.932.232.929.830.432.027.727.529.828.227.529.9

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value101099991010999101099891088779910999888776655
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.22.22.02.02.22.32.32.42.32.32.32.52.72.52.42.32.62.82.52.32.22.22.72.72.92.82.82.72.72.52.62.62.42.32.52.22.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value71696470685964706858616061605862586254605558565756565959535451454650504446
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.614.714.215.015.514.115.015.616.414.215.415.215.915.915.516.116.017.315.816.916.416.815.715.616.316.417.317.417.716.716.215.615.117.118.216.517.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value887867807065606053616342615451613045-339474444543939424326354126272852528
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues17.916.614.817.115.915.614.113.512.814.716.010.715.814.213.615.88.312.6-1.010.914.212.812.414.711.311.612.312.88.711.013.28.99.09.72.19.310.5

us-gaap:StatementBusinessSegments

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302014-09-302014-06-30
Value0-2-10-2-2-30-110-21-25-49-10-10
Percentage of OperatingIncomeLoss0.0-4.2-1.7-0.8-3.8-3.6-6.20.0-26.00.0-4.52.5-85.31400.0-27.9-2.70.0
Percentage of Revenues0.0-0.6-0.3-0.1-0.5-0.5-0.80.0-2.80.0-0.60.4-7.1-14.2-3.0-0.30.0
Percentage of Revenues us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

wst:CorporateAndEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-18-17-14-18-16-20-16-18-15-22-13-13-12-41-12-16-13-78-12-15-12-17-12-12-11-14-16-16-16-16-13-9-10-13
Percentage of OperatingIncomeLoss-20.5-22.0-21.4-22.7-22.9-30.9-26.8-30.2-29.2-36.6-21.8-30.4-20.2-75.5-25.0-26.5-44.3-173.5351.4-40.4-26.4-39.7-28.2-23.1-30.3-37.3-39.1-38.1-60.8-46.3-32.6-34.9-36.0-45.5
Percentage of Revenues-3.7-3.7-3.2-3.9-3.7-4.8-3.8-4.1-3.8-5.4-3.5-3.3-3.2-10.7-3.4-4.2-3.7-21.8-3.6-4.4-3.8-5.1-3.5-3.4-3.4-4.3-4.8-4.9-5.3-5.1-4.3-3.1-3.2-4.4
Percentage of Revenues wst:CorporateAndEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

wst:DeliverySystems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value12111110119910108897714054300214521213
Percentage of OperatingIncomeLoss14.517.214.214.918.414.917.816.924.614.417.315.823.315.9-37.110.2-1.011.710.96.8-0.5-0.35.42.817.915.45.56.58.66.214.2
Percentage of Revenues2.62.52.42.42.62.02.32.72.62.32.42.51.92.00.41.1-0.11.51.31.0-0.1-0.00.70.41.51.70.70.60.80.61.3
Percentage of Revenues wst:DeliverySystems10.810.410.410.210.58.910.612.112.411.111.312.69.86.61.34.0-0.55.04.63.7-0.2-0.12.51.45.36.22.92.02.82.24.4

wst:PackagingSystems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value937288776871626756645766615656616055526251545658395053343842
Percentage of OperatingIncomeLoss105.9108.3110.3108.9112.2118.9117.6104.9131.9105.9112.1108.2206.3125.0-1614.3158.1127.4125.3120.0116.3130.8137.5133.6135.3149.0141.9128.5133.3137.1145.8
Percentage of Revenues19.016.018.917.415.816.015.116.814.216.715.317.117.115.716.417.218.116.014.817.114.816.016.517.312.915.516.911.912.414.2
Percentage of Revenues wst:PackagingSystems25.021.124.622.621.020.719.321.718.021.019.321.321.322.522.923.825.122.621.023.520.321.722.623.318.221.422.716.617.119.5

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value2222222212122122223343444444444444444
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.40.40.50.40.50.50.50.50.50.50.30.60.50.40.60.50.70.81.10.91.21.11.31.11.21.31.21.41.41.41.41.51.51.61.71.51.5

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

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



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-2-14-400000000000000004000000
Percentage of InterestExpense-100.0-90.5204.8-208.70.00.00.00.00.015.413.09.521.413.615.012.013.810.817.6-14.6121.1-15.6-16.717.515.9-17.113.0
Percentage of Revenues-0.4-0.40.9-1.10.00.00.00.00.00.10.10.10.10.10.10.10.10.10.2-0.21.3-0.2-0.20.20.2-0.20.2
Percentage of Revenues us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryLock, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value100000.0200000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0100000.0100000.0100000.00.0100000.0100000.0-100000.0700000.0-100000.00.0100000.00.0-100000.00.0
Percentage of InterestExpense5.09.54.85.04.34.35.04.55.34.87.74.34.814.34.55.04.00.02.72.9-2.418.4-2.20.02.50.0-2.40.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.00.0-0.00.2-0.00.00.00.0-0.00.0
Percentage of Revenues us-gaap:TreasuryLock us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-10011110100
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.0-0.30.10.10.40.40.40.40.10.30.20.2

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-4725-23040-9-4920422365-345-414-12-1311-56-29-38-1-1140-1816-2912-2510
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.65.3-5.2-0.11.0-0.0-2.2-11.14.81.05.79.11.5-8.91.6-1.34.1-3.4-3.93.3-16.8-8.3-10.9-0.4-0.54.2-0.2-5.45.5-9.13.9-8.53.3

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value1516101516148612611422161417611-6912111114910108969656-346
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.13.52.43.33.63.51.91.33.014.93.50.70.64.23.84.41.93.1-1.92.63.73.33.33.82.83.13.02.53.02.03.12.21.72.1-1.31.72.3

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0000000000000-10000-18000000000
Percentage of IncomeTaxExpenseBenefit-2.0-1.2-5.50.00.60.70.01.70.0-0.30.70.00.0-7.5-1.4-1.2-2.9-6.2280.3-3.3-3.2-0.9-1.7-1.4-2.0-4.7-6.8-8.1
Percentage of Revenues-0.1-0.0-0.10.00.00.00.00.00.0-0.00.00.00.0-0.3-0.1-0.1-0.1-0.2-5.4-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.2-0.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value00-10000000000000000000000000
Percentage of IncomeTaxExpenseBenefit5.33.6-11.91.30.00.00.0-1.7-2.4-0.6-2.1-6.9-4.5-0.6-1.4-1.2-1.4-1.81.5-2.2-1.6-3.4-2.6-2.1-3.1-7.5-7.8-7.0
Percentage of Revenues0.20.1-0.30.00.00.00.0-0.0-0.1-0.1-0.1-0.1-0.0-0.0-0.1-0.1-0.0-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value74635666555255564305138603937442233127323131372726303114152916201961719
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.113.612.314.112.512.312.812.510.50.012.89.815.710.210.011.56.19.30.47.79.89.08.710.27.87.88.89.34.94.89.25.86.56.62.26.67.2

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value01-40000000-100-20000-31000000-2-2-2
Percentage of ProfitLoss0.71.7-7.60.60.70.20.5-0.5-2.10.0-2.0-1.8-0.5-6.4-2.1-1.3-2.7-2.7-2093.3-2.2-2.1-2.5-1.9-1.9-3.0-8.2-8.9-7.3
Percentage of Revenues0.10.2-0.90.10.10.00.1-0.1-0.2-0.2-0.3-0.2-0.1-0.7-0.2-0.2-0.2-0.3-9.1-0.2-0.2-0.2-0.2-0.2-0.2-0.6-0.8-0.7
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-10-10000000000-2000-1-310000000-1-1
Percentage of ProfitLoss-1.3-0.6-3.20.20.2-0.20.50.20.20.00.0-0.50.0-5.9-1.3-0.7-1.4-3.6-2093.3-2.2-1.8-1.0-1.0-0.8-1.1-3.4-4.3-4.1
Percentage of Revenues-0.2-0.1-0.40.00.0-0.00.10.00.00.00.0-0.10.0-0.6-0.1-0.1-0.1-0.3-9.1-0.2-0.2-0.1-0.1-0.1-0.1-0.3-0.4-0.4
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value11-200000-10-100000000000000-1-1-1
Percentage of ProfitLoss2.02.3-4.40.50.50.40.0-0.7-2.30.0-2.0-1.3-0.5-0.5-0.8-0.7-1.40.90.00.0-0.3-1.6-1.0-1.1-1.8-4.9-4.6-3.2
Percentage of Revenues0.30.3-0.50.10.10.00.0-0.1-0.2-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.10.10.00.0-0.0-0.1-0.1-0.1-0.1-0.4-0.4-0.3
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value745666555255564305138603937442233127323131372731152919
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.112.314.112.512.312.812.510.50.012.89.815.710.210.011.56.19.30.47.79.89.08.710.27.89.34.89.26.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3184386756514586513726668-344423625737-18-16-5362548311531-1442-73040255
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.418.08.414.312.712.210.41.815.73.218.116.617.7-1.011.710.910.17.02.110.5-5.4-4.7-1.69.97.414.29.14.410.5-4.513.3-2.49.913.60.920.3

Net Income Loss

Net Income Loss Available To Common Stockholders Diluted

Net Income Loss Attributable To Noncontrolling Interest

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value22462341217421232036197819461873186918621930184317331716173517051668169516661663159616701673170417081671166416121577156415271462145713991398136612941271
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value756768686678666582594591564582613600564599593595594671671674654714703732773765827828831835810783762744707703668691
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.732.831.631.932.729.430.531.630.231.331.832.632.634.934.234.935.639.640.340.541.042.742.042.945.345.849.751.452.753.453.153.552.353.250.651.551.754.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value22462341217421232036197819461873186918621930184317331716173517051668169516661663159616701673170417081671166416121577156415271462145713991398136612941271
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value97710581004944867894850766743743776717652641658659630673680679625659679685686650643613589557557517502472503481436397
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.545.246.244.542.645.243.740.939.839.940.238.937.637.437.938.737.839.740.940.939.239.540.640.240.238.938.738.037.435.636.535.334.533.736.035.233.731.3

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-312007-12-31
Value335439396326265337297225199235269226169203205202178274256252207255246226230230221190175161143107100911191109411097658387108
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.918.818.215.413.017.015.312.010.712.714.012.39.811.811.911.910.716.215.415.113.015.314.713.313.513.813.311.811.110.49.47.36.96.68.50.06.98.50.00.06.50.00.0

Short Term Investments

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value333319316330318288302296290278253251242224200209219209181194198189179195209208185198195189175182185176147153161126138
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.813.614.515.615.614.615.615.815.50.013.613.013.213.011.712.112.812.610.711.711.911.910.711.712.312.211.111.912.112.011.212.012.612.110.510.911.89.810.9

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value251235230232226214206208215194215215211212199201197194181187187183181185187187176176176173162165159158151155157147129
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.210.110.610.911.110.810.611.111.50.011.611.211.512.211.611.611.611.610.711.311.311.510.911.111.011.010.610.610.911.010.410.910.910.910.811.111.511.410.2

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value586461545754433637303940374639413948363333363532444434303335383632344665564238
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.82.82.62.82.72.21.92.00.02.12.12.02.72.32.42.32.92.22.02.02.32.12.02.62.62.11.82.12.22.42.42.22.43.34.64.23.33.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value18161820177917861759175217451737177517451701164615831554155114981482144013981380134913901381140213851369132812891271127412261185118411361135112710771062
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets80.977.781.984.286.488.689.792.795.093.788.189.391.490.689.487.988.985.083.983.084.583.282.682.381.181.979.879.980.681.580.381.081.381.381.282.583.283.6

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value988980967963945930923910917890865834800776778757750719708694673685686693673657646625612605589565565543559552522485
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.041.944.545.446.447.047.548.649.147.844.945.346.245.244.944.445.042.442.541.842.241.041.140.739.439.338.838.838.938.738.638.638.838.840.040.540.438.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value828839812822814822822826857855835811782778772741732721689685675705694709712711682663658669637620619593576574554577
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.935.837.438.840.041.542.244.145.945.943.344.045.245.344.543.543.942.541.441.242.342.241.541.641.742.641.041.141.842.841.742.442.542.441.242.142.945.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value197192979594919091898584838182817761615959596061605960595855596057585655484838
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.88.24.54.54.74.64.74.94.84.64.44.54.74.84.74.63.73.63.63.63.73.63.73.53.53.63.63.63.53.84.03.94.04.03.93.63.73.0

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value106107106108105105106106108107107105103103105104105104105105104108110114114114113111111112111110112111113115112114
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.84.64.95.15.25.35.55.75.85.85.55.76.06.06.16.26.36.26.36.36.56.56.66.76.76.86.86.97.07.27.37.57.78.08.18.48.79.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value2829282919202121222122222323242425373839404243464748484949505049515252555555
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.31.41.01.01.11.21.21.21.21.21.31.41.41.51.52.22.32.42.52.52.62.72.82.92.93.03.23.23.33.43.53.73.84.04.34.4

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value2224202026202121212316162121222224262527272822242324252524242424282829222219
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.10.91.01.31.01.11.11.21.30.90.91.21.21.31.31.41.61.51.61.71.71.41.41.41.41.51.61.51.61.61.72.02.12.11.71.71.5

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value344341335313301283288287263279300289256241236239241314299313296252242221227236246218208261275320302243229182169171
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.314.615.414.814.814.314.815.314.115.015.515.714.814.013.614.014.518.518.018.918.615.114.513.013.314.214.813.613.216.718.021.920.817.416.413.413.113.5

Debt Current

us-gaap:DebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value2200000000333334222269719598272721421801323989865054600
Percentage of DebtCurrent100.0100.00.00.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.00.00.00.00.00.00.00.01.71.82.00.10.10.10.14.14.35.76.21.61.60.10.80.11.10.00.12.12.66.15.93.63.90.50.00.0

us-gaap:LongtermDebtType

wst:TermLoanDue2024



Period End2020-03-31
Value2
Percentage of DebtCurrent100.0
Percentage of Assets0.1
Percentage of Assets wst:TermLoanDue20240.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value15715614515213713012512612713812113010612299107971199391881039194981088688911028185828971666368
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.06.76.77.26.86.66.46.76.87.46.37.16.17.15.76.35.87.15.65.55.56.25.55.55.86.55.25.55.86.65.35.95.76.45.14.84.95.4

Other Accrued Liabilities Current

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value1361951791717136726439171219181514181512142624161519141377655
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.30.90.30.80.50.91.00.70.30.40.10.40.30.20.51.10.81.11.10.90.91.10.90.70.91.61.51.01.01.31.00.90.60.60.50.40.4

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value979186848076768669637772716358675974535753535152555843484545437071693832404039
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.33.94.04.03.93.93.94.63.70.04.13.73.93.73.43.93.54.53.23.53.23.33.13.13.33.42.62.92.82.92.84.64.94.72.82.33.03.23.1

Dividends Payable Current

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value256257195196195196196196197228298302326330336342361404373400394430411401385289349
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.411.09.09.29.69.910.110.510.613.317.618.219.620.720.220.521.223.722.324.024.527.326.326.326.419.925.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value254255195196195196196196198197196195194226228228229228231231231309315359390371381394428378362296294299323364358379
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.310.99.09.29.69.910.110.510.610.610.210.611.213.213.213.413.813.513.913.914.518.518.921.122.922.222.924.527.224.223.720.320.221.423.126.727.729.8

us-gaap:LongtermDebtType

wst:TermLoanDue2024



Period End2020-03-312019-12-31
Value8787
Percentage of LongTermDebtNoncurrent34.234.4
Percentage of Assets3.93.7
Percentage of Assets wst:TermLoanDue20240.00.0

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value505246535456535355536260577562616062816361837579828312613813513511411211112684918785
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.22.22.52.72.82.82.92.92.93.23.33.34.43.63.63.63.74.93.83.85.04.54.64.85.07.68.68.68.77.57.77.69.06.06.76.76.7

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value404135353433434235374246464747495149534849495251525255545739383735335450433333
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.61.71.71.72.32.31.90.02.32.42.52.72.72.93.03.03.22.93.03.13.13.13.13.13.33.33.62.52.42.52.42.33.93.63.22.62.7

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value1818181818181818181818181818181818181818181717171717178888
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.90.90.91.01.01.01.01.01.01.01.11.11.11.11.11.11.11.11.11.11.11.01.01.11.10.50.60.70.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value16111549149714521398135313121258122211891178118811481118107110411013978964939947927902878855825805788719664612569
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets71.766.268.968.468.768.467.567.165.40.063.261.662.364.562.460.059.558.656.956.456.958.154.052.550.248.348.247.446.047.547.344.8

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613



Period End2020-01-01
Value100000.0
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets0.0
Percentage of Assets us-gaap:AccountingStandardsUpdate2016130.0

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value2151181261471721031081551491096264654621131244444444333234152
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.65.05.87.08.55.25.68.38.05.93.23.53.82.71.30.80.80.20.20.20.30.20.30.20.20.20.20.21.63.24.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value-192-149-170-152-153-154-153-143-95-117-130-151-179-186-143-150-148-162-154-160-170-119-71-34-33-32-69-91-92-75-71-31-19
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-8.6-6.4-7.8-7.2-7.5-7.8-7.9-7.7-5.1-6.3-6.8-8.2-10.3-10.9-8.3-8.8-8.9-9.6-9.3-9.6-10.7-7.1-4.3-2.0-2.0-1.9-4.2-5.7-5.9-4.9-5.1-2.4-1.5

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-38-40-38-40-40-40-38-38-39-39-47-46-45-45-37-38-39-39-43-63-62-64-45-46-46-47-75-81-82-84
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax19.926.922.426.726.526.225.326.941.433.236.030.525.424.326.025.326.524.428.039.336.954.263.8134.6138.5145.1108.389.489.5111.9
Percentage of Assets-1.7-1.7-1.8-1.9-2.0-2.0-2.0-2.1-2.1-2.1-2.4-2.5-2.6-2.6-2.2-2.2-2.3-2.3-2.6-3.8-3.9-3.9-2.7-2.7-2.7-2.8-4.5-5.1-5.3-5.4
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value101-1-30-1-1-2-4-5-4-1-3-2-2-3-3-2-20-4-4-5-5-6-7-8-9-9
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.90.5-0.81.22.40.31.10.92.13.63.82.90.81.71.71.62.61.91.81.50.53.65.915.317.218.510.99.410.111.9
Percentage of Assets0.1-0.00.1-0.1-0.2-0.0-0.1-0.1-0.1-0.2-0.3-0.2-0.1-0.2-0.1-0.1-0.2-0.2-0.2-0.1-0.1-0.3-0.3-0.3-0.3-0.4-0.5-0.5-0.6-0.6
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value000000000000555555444444440000
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.2-0.3-0.2-0.3-0.3-0.3-0.3-0.3-0.5-0.4-0.1-0.1-3.1-2.8-3.8-3.6-3.6-3.3-3.0-2.9-2.8-3.9-6.0-12.4-12.7-13.3-1.2-0.9-0.9-1.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.30.30.30.30.30.30.30.30.30.30.30.30.30.30.00.00.10.1
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-156-108-133-110-109-113-113-104-54-74-78-101-137-143-109-115-110-125-113-99-111-55-2513141612-1-117
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax81.272.878.672.371.373.873.972.557.063.660.366.776.876.876.176.774.677.173.262.165.446.136.3-37.5-42.9-50.3-18.12.11.3-22.7
Percentage of Assets-7.0-4.7-6.2-5.2-5.4-5.8-5.8-5.6-2.9-4.0-4.1-5.5-7.9-8.4-6.3-6.8-6.6-7.4-6.8-6.0-7.0-3.3-1.50.80.81.00.8-0.1-0.11.1
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value571061081054773888245817585207168763686877-14663648185213393994711
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues11.622.623.722.410.717.320.518.310.819.619.021.55.318.818.219.60.818.920.021.5-0.613.218.017.42.55.616.14.413.512.93.217.14.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-31-120-31-47-28-28-26-17-28-29-34-35-34-46-47-42-38-43-29-25-30-26-20-21-35-57-35-31-32-23-29-18-19
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-6.5-25.6-6.9-10.0-6.5-6.8-6.1-3.8-6.9-7.1-8.5-8.9-9.0-12.2-12.7-11.0-10.7-12.2-8.6-7.1-9.1-7.5-5.8-5.8-10.3-17.0-11.1-10.1-10.9-7.5-9.9-6.7-7.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-1205103-90-810-25-56-86-32-21-26-15-7-65-1-30-101-1-10-452655-5246-20-14-5
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-24.510.8-0.10.7-20.4-1.92.3-5.7-13.7-20.8-0.80.6-5.6-6.9-4.0-1.9-18.0-0.4-8.8-3.00.4-0.5-2.8-12.37.616.4-1.87.72.1-0.90.0-5.3-2.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value571061081054773888245817585207168763686877-14663648185213393994711
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues11.622.623.722.410.717.320.518.310.819.619.021.55.318.818.219.60.818.920.021.5-0.613.218.017.42.55.616.14.413.512.93.217.14.2

Net Income Loss

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value74635666555255564305138603937442233127323131372726303114152916201961719
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.113.612.314.112.512.312.812.510.50.012.89.815.710.210.011.56.19.30.47.79.89.08.710.27.87.88.89.34.94.89.25.86.56.62.26.67.2

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value01-40000000-100-20000-31000000-2-2-2
Percentage of ProfitLoss0.71.7-7.60.60.70.20.5-0.5-2.10.0-2.0-1.8-0.5-6.4-2.1-1.3-2.7-2.7-2093.3-2.2-2.1-2.5-1.9-1.9-3.0-8.2-8.9-7.3
Percentage of Revenues0.10.2-0.90.10.10.00.1-0.1-0.2-0.2-0.3-0.2-0.1-0.7-0.2-0.2-0.2-0.3-9.1-0.2-0.2-0.2-0.2-0.2-0.2-0.6-0.8-0.7
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-10-10000000000-2000-1-310000000-1-1
Percentage of ProfitLoss-1.3-0.6-3.20.20.2-0.20.50.20.20.00.0-0.50.0-5.9-1.3-0.7-1.4-3.6-2093.3-2.2-1.8-1.0-1.0-0.8-1.1-3.4-4.3-4.1
Percentage of Revenues-0.2-0.1-0.40.00.0-0.00.10.00.00.00.0-0.10.0-0.6-0.1-0.1-0.1-0.3-9.1-0.2-0.2-0.1-0.1-0.1-0.1-0.3-0.4-0.4
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value11-200000-10-100000000000000-1-1-1
Percentage of ProfitLoss2.02.3-4.40.50.50.40.0-0.7-2.30.0-2.0-1.3-0.5-0.5-0.8-0.7-1.40.90.00.0-0.3-1.6-1.0-1.1-1.8-4.9-4.6-3.2
Percentage of Revenues0.30.3-0.50.10.10.00.0-0.1-0.2-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.10.10.00.0-0.0-0.1-0.1-0.1-0.1-0.4-0.4-0.3
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value745666555255564305138603937442233127323131372731152919
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.112.314.112.512.312.812.510.50.012.89.815.710.210.011.56.19.30.47.79.89.08.710.27.89.34.89.26.6
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-06-302011-03-312010-03-31
Value4-10000-320027003-33-9060-556-1261-43-70433703664-31-27
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-31-120-31-47-28-28-26-17-28-29-34-35-34-46-47-42-38-43-29-25-30-26-20-21-35-57-35-31-32-23-29-18-19
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-6.5-25.6-6.9-10.0-6.5-6.8-6.1-3.8-6.9-7.1-8.5-8.9-9.0-12.2-12.7-11.0-10.7-12.2-8.6-7.1-9.1-7.5-5.8-5.8-10.3-17.0-11.1-10.1-10.9-7.5-9.9-6.7-7.2

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value323731282830262028293429374748353944292630272824316137322418192117
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-1205103-90-810-25-56-86-32-21-26-15-7-65-1-30-101-1-10-452655-5246-20-14-5
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-24.510.8-0.10.7-20.4-1.92.3-5.7-13.7-20.8-0.80.6-5.6-6.9-4.0-1.9-18.0-0.4-8.8-3.00.4-0.5-2.8-12.37.616.4-1.87.72.1-0.90.0-5.3-2.1

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-03-31
Value600000.00.0
Percentage of RepaymentsOfLongTermDebt100.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value115000830022474700262598900001001202
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.00.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-03-31
Value600000.00.0
Percentage of RepaymentsOfLongTermDebt100.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value0.1740.00400000000000000360.1680.1940.2310.020999999999999990.1310.0990.2330.2470.2230.0710.0360.005999999999999950.2930.2860.2480.2550.2840.00200000000000000180.2820.2770.2760.2970.2650.220.4040.3270.2610.30.2250.2490.213
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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

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

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:PerformanceShares



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302015-12-312015-09-30
Value50459.0188.00.082458.02421.01821.07539.0653.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value5424.01691.02674.07266.00.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod10.7899.50.08.80.0

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value5557605632453544453155634455
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value68707174750
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Proceeds From Sale Of Short Term Investments

us-gaap:AdjustmentForAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value100100000000000000011111111111111
Percentage of AdjustmentForAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllocatedShareBasedCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value55576056324535444-53155634455544333
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value0000000000000000000000011111
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value01000-3000-20000010000000000000
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability10.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-03-31
Value-103-71
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value0.160.160.150.150.149999999999999970.150.140.140.140.140.130.130.130.130.120.120.120.120.110.110.099999999999999980.110.10.10.10.190.190.00.180.180.00.170.170.340.00.16
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

wst:BiologicsCustomers, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.280.260.250.260.210.210.210.23
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0100.0100.0

wst:ContractManufacturedCustomers, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.240.240.230.230.240.230.220.22
Percentage of ConcentrationRiskPercentage185.792.392.088.5114.3109.5104.895.7

wst:GenericsCustomers, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.190.20.210.20.210.210.210.22
Percentage of ConcentrationRiskPercentage167.976.984.076.9100.0100.0100.095.7

wst:PharmaCustomers, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.290.30.310.310.340.350.360.33
Percentage of ConcentrationRiskPercentage1103.6115.4124.0119.2161.9166.7171.4143.5

us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

wst:ContractManufacturedProducts, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.240.240.230.230.240.230.220.22
Percentage of ConcentrationRiskPercentage185.792.392.088.5114.3109.5104.895.7

wst:DeliveryDevices, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.050.060.040.040.040.030.030.04
Percentage of ConcentrationRiskPercentage117.923.116.015.419.014.314.317.4

wst:HighValueComponents, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.430.420.440.430.410.430.410.42
Percentage of ConcentrationRiskPercentage1153.6161.5176.0165.4195.2204.8195.2182.6

wst:StandardPackaging, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.280.280.290.30.310.310.340.32
Percentage of ConcentrationRiskPercentage1100.0107.7116.0115.4147.6147.6161.9139.1

us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

srt:Americas, us-gaap:SalesRevenueNet, us-gaap:GeographicConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.480.480.490.460.510.480.450.5
Percentage of ConcentrationRiskPercentage1171.4184.6196.0176.9242.9228.6214.3217.4

srt:AsiaPacific, us-gaap:SalesRevenueNet, us-gaap:GeographicConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.080.080.080.070.080.080.080.08
Percentage of ConcentrationRiskPercentage128.630.832.026.938.138.138.134.8

us-gaap:EMEA, us-gaap:SalesRevenueNet, us-gaap:GeographicConcentrationRisk



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.440.440.430.470.410.440.470.42
Percentage of ConcentrationRiskPercentage1157.1169.2172.0180.8195.2209.5223.8182.6

us-gaap:DefinedBenefitPlanActuarialGainLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value0000000000-100-1-1-1000-1-2-2-12-2-11
Percentage of DefinedBenefitPlanActuarialGainLoss100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value00000000000000-10048-50-1-10000-1-2-2
Percentage of DefinedBenefitPlanActuarialGainLoss100.00.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.04183.3100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0-20000000000000
Percentage of DefinedBenefitPlanActuarialGainLoss-400.00.0350.00.00.00.0-350.0-150.0-125.00.0-300.0-50.0-140.00.0-30.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0-29000230-10-8-1-1-1-19-1
Percentage of DefinedBenefitPlanActuarialGainLoss500.00.0-250.00.00.00.0450.0250.0225.00.0400.0150.0240.00.0130.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value-200000.0-100000.0-100000.0-200000.0-500000.0-600000.0-500000.0-400000.0-600000.0-500000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-400000.0-300000.0-400000.0-400000.0-300000.0-400000.0-400000.0-300000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-200000.0-200000.0-100000.0-100000.0-200000.0-400000.0-500000.0-600000.0-500000.0-600000.0-400000.0-600000.0-500000.0-400000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0-400000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-200000.0-200000.0-200000.0-100000.0-200000.0-200000.0-200000.0-100000.0-200000.0-200000.0-100000.0-200000.0-200000.00.00.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.00.0200.0100.0100.00.040.016.740.00.025.033.340.00.0-0.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.00.0100000.00.00.0-200000.0-300000.0-500000.0-300000.0-300000.0-300000.0-400000.0-300000.0-400000.0-300000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-0.00.0-100.0-0.0-0.00.060.083.360.00.075.066.760.00.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value33223333333334554444444444444
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value333224333333333
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:DefinedBenefitPlanInterestCost



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value22222222222223444443434444444
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value100000.00.0100000.00.0100000.00.0100000.00.0100000.0100000.00.0100000.0100000.0200000.0100000.0
Percentage of DefinedBenefitPlanInterestCost5.00.05.00.04.00.04.20.04.20.00.04.03.80.03.6

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value121222222222222
Percentage of DefinedBenefitPlanInterestCost95.00.095.0100.096.00.095.8100.095.80.0100.096.096.20.096.4

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value01001011212122251222223444443343
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation

country:US



Period End2020-03-312019-09-302019-03-312018-09-30
Value0100
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost50.070.6350.025.0

us-gaap:ForeignPlan



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value300000.0500000.0500000.0500000.0600000.0500000.0500000.0700000.0700000.0700000.0600000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost50.029.4-250.0-250.075.050.041.750.035.036.821.4

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:US, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-500000.0-700000.0-800000.0-600000.0-800000.0-800000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-83.30.0-47.1300.0-72.7-100.0

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value002011
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost133.30.0117.650.0118.2125.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value300000.0400000.0500000.0500000.0500000.0600000.0600000.0500000.0500000.0900000.0700000.0700000.0700000.0600000.0600000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost50.00.029.4-250.0-250.054.575.050.041.745.050.035.036.80.021.4

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-500000.0-700000.0-800000.0-700000.0-600000.0-800000.0-800000.0-700000.0-600000.0-700000.0-1000000.0-500000.0-800000.0-100000.0-100000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-83.30.0-47.1350.0300.0-72.7-100.0-70.0-50.0-35.0-71.4-25.0-42.10.0-3.6

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value102001111222202
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost183.30.0147.1-250.0-200.0172.7200.0170.0150.0135.0171.4125.0142.10.0103.6

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1



Period End2020-03-312019-09-302019-03-312018-09-302016-12-312016-09-302015-12-312015-09-30
Value-1-20000-1-49
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.00.00.00.00.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-03-31
Value-10
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.00.0

us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-09-30
Value-16-200
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.00.0100.00.00.0

us-gaap:DefinedBenefitPlanServiceCost



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value0000222222222222222222222222222
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000002222222222
Percentage of DefinedBenefitPlanServiceCost100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.095.8

us-gaap:Depreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value242524252425252425242422222222222122212121202122201917171718181816
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings

us-gaap:FairValueHedging



Period End2020-03-312019-03-31
Value21
Percentage of DerivativeExcludedComponentGainLossRecognizedInEarnings100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-24-4-1-20
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:FairValueHedging



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-24-4-1-20
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value0.0-100000.0-200000.0-200000.0-100000.0-100000.0-100000.0100000.0400000.0400000.0300000.0100000.00.00.00.00.00.00.00.00.00.0200000.00.00.00.0800000.0900000.0600000.00.00.00.00.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.00.00.00.0100.0100.0100.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, wst:NetSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-200000.0-200000.0-300000.0-200000.0-200000.0-200000.00.0300000.0500000.0400000.0400000.0200000.0100000.0-100000.00.0100000.00.0-500000.0-400000.0-400000.0-300000.0-100000.0-200000.00.00.0-200000.00.00.00.00.00.00.0100000.0200000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.0200.0150.0100.0200.0200.0-0.0300.0125.0100.0133.3200.00.00.00.00.00.00.00.00.00.0-50.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-12-312019-09-302019-03-31
Value-1-12-3
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.01300.0-1450.03200.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value00000000101000000000000001110000100
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.0200.0200.0150.0300.0200.0-0.0400.0250.0200.0333.3500.00.00.00.00.00.00.00.00.00.0250.00.00.00.0162.5155.6166.70.00.00.00.00.00.00.0

us-gaap:FairValueHedging



Period End2020-03-312019-12-312019-09-302019-03-31
Value-1-12-3
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.01300.0-1450.03200.0

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

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:CommodityOption, us-gaap:Nondesignated, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value200000.0100000.0100000.0200000.00.0400000.00.0500000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.00.0100.00.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value200000.0100000.0100000.0200000.00.0400000.00.0500000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.00.0100.00.0100.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value111111101102010101099999888877777666-5
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value-11-11-11-101102010101099999888877777666-5
Percentage of DividendsCommonStockCash-100.0-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-86-60030-1341352-1-2-14-4-43-16-9-1300-3-32-5230-3
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value01000-3000-200000100000200000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value100000.0200000.00.0100000.0200000.0100000.00.0300000.0200000.0200000.0300000.0100000.0100000.0200000.0100000.00.00.00.00.00.0100000.0100000.0100000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-35-4-3-2-10
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:CostOfSales



Period End2020-03-312019-03-31
Value0.0-100000.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.0100.0

us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-03-31
Value-1-3
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.03200.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value867764796965616053596240595349592742-636444141503535383922203722232412125
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-10-20000000000-3000-1-490-10000-1-2-2
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-1.5-0.8-3.70.10.30.00.50.30.2-0.20.2-0.50.0-6.6-1.4-0.8-1.8-4.5744.8-2.5-2.3-1.0-1.2-1.0-1.4-3.9-5.2-5.1

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value22-300000-1-1-100000000000000-2-2-1
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments2.72.7-5.90.60.40.30.0-0.8-2.4-2.0-2.1-1.7-0.7-0.6-1.0-0.8-1.40.21.5-0.6-0.7-2.2-1.5-1.4-2.2-5.9-5.7-4.1

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value2322112222213222121011111111121111011
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value10111011101110111011101111000000000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-31
Value0110000000000000000000100000000000000
Percentage of InvestmentIncomeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value444444333
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value3333
Percentage of OperatingLeaseCost100.0100.0100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-09-302019-06-302019-03-31
Value3333
Percentage of OperatingLeasePayments100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-4221-16110-9-48201220267-455-214-9-259-51-48-37-1-2
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1-2000-101080-10-100002-1101-19000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-2.4-11.4-3.712.5-16.7533.3-1.0-2.3-2.964.3-3.5-3.8-1.322.61.8-31.00.7-27.545.9-8.5-2.339.8-2.417.64.5

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value4062-310010-1-31-101-100-130000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-9.7-2.7-42.3131.2-250.0-500.04.1-0.65.80.0-7.9-12.818.72.2-5.3-37.9-7.1-0.01.6-17.0-6.41.2-1.9-5.913.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000000-50000000000000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-0.00.0-0.00.00.033.3-0.0-0.00.03.20.0-20.44.00.40.0-0.00.0-7.7-0.00.0-0.0-0.8-0.0-0.0-0.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-4725-23040-9-4920422365-345-414-12-1311-56-29-38-1-1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax112.1114.2146.0-43.8366.733.396.9102.997.132.5111.4137.078.774.7103.5169.0106.4135.252.5125.5108.759.8104.388.281.8

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value2-231-3100200-21001000-1301001000-2000
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value10101000000-1000000001000000001000
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-4220-18100-10-47211321277-436-214-8510-51-47-360-1211-1617-3013-2310
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value2-2200-10108000-801031901-191002
Percentage of OtherComprehensiveIncomeLossNetOfTax-4.7-10.1-13.28.3-37.5375.02.0-2.1-3.360.2-3.3-2.9-1.318.69.2-52.22.7-45.1339.7-2.0-3.539.9-3.3-11.1-14.3-12.7

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value2-231-3100200-21001000-1301000
Percentage of OtherComprehensiveIncomeLossNetOfTax-6.1-10.1-17.6150.0-412.5-325.04.0-1.510.26.0-2.8-10.721.81.90.0-60.9-4.83.7-6.9-14.9-6.70.2-3.0-55.6-14.31.8

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value00000000000-500000000000000
Percentage of OtherComprehensiveIncomeLossNetOfTax-0.00.0-0.00.00.025.0-0.0-0.00.03.00.0-19.93.80.50.0-0.00.0-8.50.00.0-0.0-0.8-0.0-0.0-0.0-0.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value-42-18100-10-47211321277-436-214-8510-51-47-360-1-16
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value-4725-23040-9-4920422365-345-414-12-1311-56-29-38-1-1-18
Percentage of OtherComprehensiveIncomeLossNetOfTax110.8120.2130.8-58.3550.025.094.1103.593.030.8106.1133.575.679.190.8213.0102.1150.0-232.8116.8110.260.8106.3166.7128.6110.8

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-2-2000-100000-10-190-1-100-6-1-20-10-10
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value0000000000000110000040100000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:CurrencySwap, us-gaap:NetInvestmentHedging, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-03-31
Value-10
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.00.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-1000100100
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-33.30.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, wst:NetSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value100000.0-200000.0700000.0-200000.0500000.0200000.0100000.0500000.0-400000.0-100000.0-700000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-8.30.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueHedging, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value30010
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-300.00.00.00.00.0

wst:ForeignCurrencyDenominatedDebt, us-gaap:NetInvestmentHedging, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00000001000
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-110010010-1
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-41.70.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value30010
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-300.00.00.00.00.0

us-gaap:NetInvestmentHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1-1000001000
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-31
Value45-16-638-14255-6637-41101101-422-402
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value01-3320210-200-120-10000010000000
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringPlan

us-gaap:OtherRestructuringCosts

wst:A2018RestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value001001001
Percentage of OtherRestructuringCosts0.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value100000.0200000.00.0100000.0200000.0100000.00.0300000.0200000.00.00.00.00.0
Percentage of PaymentForContingentConsiderationLiabilityOperatingActivities100.0100.00.0100.0100.0100.00.0100.0100.00.00.00.00.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value0-2000-10-30000-2000000-10-100000000000
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:RestructuringCostAndReserve

us-gaap:PaymentsForRestructuring

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0100101011000
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RestructuringPlan

wst:A2018RestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0100100
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.00.00.0

us-gaap:PaymentsOfDebtIssuanceCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302010-12-31
Value0.0300000.00.0100000.0800000.00.00.00.00.00.00.0
Percentage of PaymentsOfDebtIssuanceCosts0.0100.00.0100.0100.00.00.00.00.00.00.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value1111111111111010101099998888777777766656555
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value111111111110000000000
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLongTermLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-06-302011-03-31
Value08000280000000001413376413957125431692906
Percentage of ProceedsFromLongTermLinesOfCredit0.0100.00.00.0100.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromStockOptionsExercised



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value69123196461118271211652250
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0110000000-100-20000-31000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-10-10000000000-2000-1-31000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-200.0-36.4-94.725.025.0-100.0100.0-33.3-11.1-14.3-0.028.6-0.092.062.550.050.0133.3100.085.785.737.542.950.037.5

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value11300000-10-100000000000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax300.0136.4194.775.075.0200.00.0133.3111.1114.3100.071.4100.08.037.550.050.0-33.3-0.014.314.362.557.150.062.5

us-gaap:RepaymentsOfLongTermLinesOfCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value00028000000001413421414999939575
Percentage of RepaymentsOfLongTermLinesOfCredit0.00.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringPlan

us-gaap:RestructuringCharges

wst:A2018RestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value011102123
Percentage of RestructuringCharges0.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserveSettledWithoutCash2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-31
Value00100100001
Percentage of RestructuringReserveSettledWithoutCash20.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-09-302019-06-302019-03-31
Value2016
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0

us-gaap:RestructuringPlan

us-gaap:SeveranceCosts1

wst:A2018RestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000100012
Percentage of SeveranceCosts10.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302015-12-312015-09-30
Value173.220.07999999999999830.0102.510.35000000000000850.199999999999988630.230000000000003980.00999999999999801
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value173.224.2599999999999915.719999999999999102.510.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.05325.00.0100.00.0

us-gaap:ShortTermLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value200000.0100000.0200000.0200000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-03-31
Value0.00.00.00.00.00.00.0100000.0300000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation0.00.00.00.00.00.00.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-300000.0-300000.0-200000.0-200000.00.0-600000.0-200000.0-100000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation0.00.00.00.00.00.00.0-100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value1216191032512658122053318422956367211
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-5-4-5-3-2-21-3345111642-41832
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-39.8-30.1-25.9-32.7-64.5-86.6-31.158.577.473.891.183.577.471.0-102.698.997.5104.2

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value0.00.00.00.00.00.00.00.0100000.00.0100000.0200000.00.00.0100000.0200000.0100000.00.00.0100000.00.00.0100000.0100000.0100000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.00.00.00.00.00.00.00.01.90.00.81.00.00.02.61.12.50.00.01.10.00.03.21.51.3

us-gaap:TreasuryStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-03-312013-03-312012-06-302012-03-312011-03-31
Value1721241454716212131000658
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation139.8130.1125.9132.7164.5186.6131.141.520.826.28.115.522.629.0-6.0-9.2246.4294.4540.0

us-gaap:TreasuryStockSharesAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-30
Value761500.00.00.00.0800000.00.00.0260000.0540000.0475000.00.00.0329190.0117310.0110700.0
Percentage of TreasuryStockSharesAcquired100.00.00.00.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-31
Value800000.0800000.00.00.0300000.0500000.0
Percentage of TreasuryStockSharesAcquired105.1100.00.00.0115.492.6

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-06-302012-03-312011-03-31
Value115000830022474700262598910-2
Percentage of TreasuryStockValueAcquiredCostMethod100.00.00.00.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-06-302012-03-312011-03-31
Value115830022474700262598910-2
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value800000.0800000.0900000.0600000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0

wst:Developmentandlicensingincome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000000000090000
Percentage of Developmentandlicensingincome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NatureOfExpense

wst:SmartDose



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value200000.0300000.0200000.0200000.0200000.0300000.0200000.0200000.0200000.0300000.0400000.0400000.0400000.0300000.0400000.0
Percentage of Developmentandlicensingincome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.04.2100.0100.0100.0100.0

wst:OtherIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value34-62220-1-319-1101-20-25-2-48-1001000000-1000000
Percentage of OtherIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wst:Pensionsettlementcharge



Period End2020-03-312019-03-31
Value10
Percentage of Pensionsettlementcharge100.00.0

wst:PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value322933272422162423
Percentage of PurchasesAndRoyaltyPaymentsFromEquityMethodInvestees100.0100.0100.0100.0100.0100.0100.0100.0100.0

wst:SalesToEquityMethodInvestees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value222221322
Percentage of SalesToEquityMethodInvestees100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding



Period End2020-04-172020-01-31
Value7373
Percentage of EntityCommonStockSharesOutstanding100.0100.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value26727226827327828228230430830930229227626024724023820719518817016014913812912010379767772
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value101923192715129
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value911999898
Percentage of AssetsFairValueDisclosure87.759.242.746.933.957.277.094.7

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17131017620
Percentage of AssetsFairValueDisclosure12.340.857.353.166.142.823.05.3

us-gaap:BusinessCombinationContingentConsiderationLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value3311115554888877665555544433
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:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value3311115554888877665555544433
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:ContractWithCustomerAssetNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-31
Value16991111976677
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-012017-12-31
Value4134303236333024223333
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

wst:SmartDose



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value555666667
Percentage of ContractWithCustomerLiability12.916.019.118.517.319.522.328.532.1

us-gaap:CostMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-31
Value13131313131313131313131313131313533
Percentage of CostMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption



Period End2020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value011111111-4-4-4-4
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value011111111-4-4-4-4
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value25725819519619619619619719819733229229228228232232233299
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

wst:TermLoanDue2024



Period End2020-03-312019-12-31
Value8990
Percentage of DebtInstrumentCarryingAmount34.734.9

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value101211101091099999886668899877101297
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value101211101091099999886668899877101297
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value91199989888887766666666665554
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value91199989888887766666666665554
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet



Period End2020-03-312019-12-31
Value1214
Percentage of DeferredIncomeTaxAssetsNet100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-31
Value515
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent



Period End2020-03-312019-12-312018-12-31
Value540
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.00.0

us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:Position

us-gaap:DerivativeNotionalAmount

currency:JPY, us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Long



Period End2020-03-312019-12-312019-09-30
Value917565505921
Percentage of DerivativeNotionalAmount100.0100.0100.0

currency:JPY, us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Short



Period End2020-03-312019-12-312019-09-30
Value453731
Percentage of DerivativeNotionalAmount0.50.60.5

currency:SGD, us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Long



Period End2020-03-312019-12-312019-09-30
Value592931
Percentage of DerivativeNotionalAmount0.70.40.5

currency:SGD, us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Short



Period End2020-03-312019-12-312019-09-30
Value351618
Percentage of DerivativeNotionalAmount0.40.30.3

currency:USD, us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Long



Period End2020-03-312019-12-312019-09-30
Value523839
Percentage of DerivativeNotionalAmount0.60.60.7

us-gaap:DueFromAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2111111000001
Percentage of DueFromAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToAffiliateCurrentAndNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2220242217121291055109
Percentage of DueToAffiliateCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value6173725953646755505662484351585543535652385251514159555038565248374548484846
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value18417984828177777876727170676968645657575956
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value331111555488887766555554443333322212
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value17131017623301010010011400
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value17131017623301010010011400
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302014-09-30
Value5000058254401001000
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CurrencySwap



Period End2020-03-312019-12-31
Value21
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure56.9466.7

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CurrencySwap, us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-31
Value21
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure56.9466.7

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302014-09-30
Value5000058254401001000
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryFinishedGoodsNetOfReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value1039792918781757983949292979286858476787980768280828076757470716569676865
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsNetOfReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value1041009910210090939092888985817882807674787875797776757271727167706866656460
Percentage of InventoryRawMaterialsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value433738383942383940313333332832323330313027252631292428282723242522192121
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue



Period End2020-03-312019-12-31
Value8688
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive



Period End2020-03-312019-12-31
Value4141
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive



Period End2020-03-312019-12-31
Value77
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour



Period End2020-03-312019-12-31
Value87
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree



Period End2020-03-312019-12-31
Value98
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo



Period End2020-03-312019-12-31
Value1010
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear



Period End2020-03-312019-12-31
Value912
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount



Period End2020-03-312019-12-31
Value1516
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0

us-gaap:LiabilitiesFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value211713121311212216192223171916161617161717171717202221423458406386316305151513
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value10121110109109999988666889987710129987665445
Percentage of LiabilitiesFairValueDisclosure47.771.985.186.180.883.848.843.256.049.742.441.049.744.242.541.239.551.850.053.252.050.346.244.350.555.045.22.31.91.91.81.91.829.728.439.1

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value810000582545021132223344558409446396376307298896
Percentage of LiabilitiesFairValueDisclosure37.49.61.50.06.21.727.034.914.325.621.922.64.513.78.810.922.212.915.216.418.520.824.027.626.525.537.396.997.497.397.497.397.556.859.444.2

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value331111555488887766555554443333322212
Percentage of LiabilitiesFairValueDisclosure15.018.513.413.913.114.524.221.829.824.635.736.345.842.148.847.938.335.334.830.429.528.929.828.223.019.517.50.80.70.80.80.80.813.512.316.7

us-gaap:LongTermDebtFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302010-12-31
Value260263204203197192192194198201201199196228240243239225231229237311320359387365383400435386364299279302344
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value7072737677
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value99910100
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value61626366670
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent



Period End2020-03-312019-12-31
Value0.03770.0376
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OtherAssetsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.0100000.0100000.0100000.0200000.0
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.0100000.0100000.0100000.0200000.0
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value22222222222222555522222222322222222222
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserve

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value01221223445657000012345610
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringPlan

wst:A2018RestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0122123320
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value149015731487144513691396135112811305127913161242116811171142110910741023995989941956970972934906836784745728717679694654691663625579487490
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-192-149-170-152-153-154-153-143-95-117-130-151-179-186-143-150-148-162-154-160-170-119-71-34-33-32-69-91-92-75-71-88-58-71-24-10-31-19-4433
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-12.9-9.5-11.5-10.5-11.2-11.0-11.4-11.2-7.3-9.2-9.9-12.2-15.3-16.7-12.6-13.5-13.8-15.9-15.5-16.2-18.1-12.5-7.3-3.6-3.6-3.6-8.3-11.7-12.4-10.4-10.0-13.1-8.4-10.9-3.5-1.6-5.0-3.4-9.26.8

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value26727226827327828228230430830930229227626024724023820719518816012079767772
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest18.017.318.018.920.320.220.923.823.624.223.023.523.623.321.721.722.220.319.719.116.713.210.911.712.412.6

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value1818181818181818181818181818181818181818181717171717178888888888888
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest1.31.21.31.31.41.31.41.51.41.51.41.51.61.61.61.71.71.81.81.81.91.91.81.81.91.92.11.11.21.21.21.31.21.31.21.31.41.51.81.8

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value1611154914971452139813531312125812221178118811481118107110411013978964939947927902878855825805788775745719711697687664657626612569517450
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest108.298.5100.7100.5102.196.997.198.193.792.190.392.495.795.991.291.491.194.294.495.798.594.390.688.088.388.894.398.999.998.899.3102.699.0101.595.294.597.998.3106.291.7

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-215-118-126-147-172-103-108-155-149-109-62-64-65-46-21-13-12-4-4-4-4-4-4-4-4-3-3-3-3-3-10-13-18-23-26-35-41-52-63-71
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-14.5-7.5-8.5-10.2-12.6-7.4-8.0-12.2-11.4-8.5-4.8-5.2-5.6-4.1-1.9-1.2-1.2-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.4-1.4-1.9-2.6-3.5-3.8-5.4-6.6-9.0-13.0-14.6

us-gaap:TransferOfFinancialAssetsAccountedForAsSalesCashProceedsReceivedForAssetsDerecognizedAmount



Period End2020-03-312019-12-312019-03-312018-12-31
Value31015
Percentage of TransferOfFinancialAssetsAccountedForAsSalesCashProceedsReceivedForAssetsDerecognizedAmount100.0100.0100.0100.0

us-gaap:TreasuryStockShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-31
Value1111111111000000000000000000011
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnamortizedDebtIssuanceExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value700000.0700000.0500000.0500000.0600000.0600000.0600000.0600000.0700000.0700000.0700000.0800000.0800000.0900000.0900000.0900000.01000000.01000000.0
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MeasurementInputType

wst:BusinessCombinationContingentConsiderationMeasurementInput

us-gaap:MeasurementInputDiscountRate



Period End2020-03-31
Value0.19
Percentage of BusinessCombinationContingentConsiderationMeasurementInput100.0

us-gaap:Range, us-gaap:MeasurementInputType

srt:Maximum, wst:ProbabilitiesOfSuccessfulExecutionOfAgreement



Period End2020-03-31
Value1.0
Percentage of BusinessCombinationContingentConsiderationMeasurementInput526.3

srt:Maximum, wst:ProbabilitiesOfSuccessfulFDAApproval



Period End2020-03-31
Value1.0
Percentage of BusinessCombinationContingentConsiderationMeasurementInput526.3

srt:Minimum, wst:ProbabilitiesOfSuccessfulExecutionOfAgreement



Period End2020-03-31
Value0.15
Percentage of BusinessCombinationContingentConsiderationMeasurementInput78.9

srt:Minimum, wst:ProbabilitiesOfSuccessfulFDAApproval



Period End2020-03-31
Value0.13
Percentage of BusinessCombinationContingentConsiderationMeasurementInput68.4

wst:ForecastedBaseCase, wst:SalesProjections



Period End2020-03-31
Value0.5
Percentage of BusinessCombinationContingentConsiderationMeasurementInput263.2

wst:ForecastedDownsideCase, wst:SalesProjections



Period End2020-03-31
Value0.4
Percentage of BusinessCombinationContingentConsiderationMeasurementInput210.5

wst:ForecastedUpsideCase, wst:SalesProjections



Period End2020-03-31
Value0.1
Percentage of BusinessCombinationContingentConsiderationMeasurementInput52.6

Line plots across dimensions of each concept

us-gaap:SharesIssued us-gaap:StatementEquityComponents


us-gaap:Revenues us-gaap:StatementBusinessSegments


us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments


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


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


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


us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents


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