SWM


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:RestructuringCostAndReserve
us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:RestructuringCostAndReserve
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

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

us-gaap:ResearchAndDevelopmentExpense

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

us-gaap:Revenues

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

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AssetsNoncurrent

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:StatementBusinessSegments

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:DebtCurrent

us-gaap:LiabilitiesCurrent
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:IncomeStatementLocation
us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:RestructuringCostAndReserve
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:IncomeTaxAuthority
us-gaap:StatementGeographical

swm:AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment
us-gaap:StatementEquityComponents
us-gaap:BusinessAcquisition
swm:BusinessCombinationConsiderationTransferredTransactionCost
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
swm:DebtInstrumentOptionToExtendAmount

swm:OperatingProfitPercentage
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

swm:PensionAndOtherPostretirementBenefitExpenseNetOfPensionAndOtherPostretirementBenefitContributions

swm:SalesRevenueNetPercentage
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType
swm:TaxAmnestyTaxLiabilityReductionPercent

swm:WriteDownValueSparePartsAndConsigmentInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredOther1
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationIntegrationRelatedCosts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DistributedEarnings

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EquityMethodInvestmentDividendsOrDistributions
dei:LegalEntity, us-gaap:LitigationCase
us-gaap:GainLossRelatedToLitigationSettlement
dei:LegalEntity, us-gaap:LitigationCase, us-gaap:IncomeStatementLocation
dei:LegalEntity, us-gaap:LitigationCase, us-gaap:IncomeStatementLocation, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:InventoryWriteDown
us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityInterestRateDuringPeriod
dei:LegalEntity, us-gaap:LitigationCase
us-gaap:LossContingencyAccrualPayments
dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType

us-gaap:LossContingencyLossInPeriod

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

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

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:StatementEquityComponents

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherRestructuringCosts

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForRestructuring
us-gaap:StatementBusinessSegments

us-gaap:PaymentsForSoftware

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:BusinessAcquisition

us-gaap:RestructuringCharges
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:RestructuringCosts

us-gaap:RestructuringReserveAcceleratedDepreciation
us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserveTranslationAndOtherAdjustment

us-gaap:RestructuringSettlementAndImpairmentProvisions
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementScenario, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType

us-gaap:SellingExpense

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:LongtermDebtType
swm:BankOverdraftFacilities
us-gaap:BusinessAcquisition
swm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherCurrentLiabilities

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseAfterYearFive

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinNextTwelveMonths

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFive

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFour

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearThree

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearTwo

swm:DeferredTaxAssetsOperatingLossCarryforwardsandTaxCreditCarryforwards
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
swm:IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
swm:IntangibleAssetsAccumulatedForeignExchangeGainLoss
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
swm:IntangibleAssetsAccumulatedImpairmentLoss

swm:LeaseLiability

swm:LeaseRightOfUseAsset

swm:LeaseRightOfUseAssetAccumulatedDepreciation

swm:LeaseRightOfUseAssetGross
us-gaap:PropertyPlantAndEquipmentByType

swm:LesseeLeaseLiabilityPaymentsDue

swm:LesseeLeaseLiabilityPaymentsDueAfterYearFive

swm:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths

swm:LesseeLeaseLiabilityPaymentsDueYearFive

swm:LesseeLeaseLiabilityPaymentsDueYearFour

swm:LesseeLeaseLiabilityPaymentsDueYearThree

swm:LesseeLeaseLiabilityPaymentsDueYearTwo

swm:LesseeLeaseLiabilityUndiscountedExcessAmount

swm:LongTermDebtMaturityAfterYearFour

swm:OperatingAndFinanceLeaseRightOfUseAsset

swm:OperatingLeaseRightOfUseAssetAccumulatedDepreciation

swm:OperatingLeaseRightOfUseAssetGross
us-gaap:PropertyPlantAndEquipmentByType

swm:OtherLiabilitiesFrenchLawCetAccount
us-gaap:StatementBusinessSegments
swm:RestructuringAndRelatedCostCumulativeCost
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:StatementEquityComponents
us-gaap:AociTaxAttributableToParent
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisitionSharePrice
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:DebtInstrumentCarryingAmount
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFairValue
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:LongtermDebtType

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
us-gaap:StatementScenario, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:StatementScenario, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

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

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:DerivativeInstrumentRisk
us-gaap:SubsequentEventType

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
dei:EntityByLocation
us-gaap:EquityMethodInvestmentOwnershipPercentage
dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestments
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:FinanceLeaseLiability
us-gaap:LongtermDebtType

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxesReceivable

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryNoncurrent

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventorySuppliesNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap:LitigationCase, us-gaap:Range, us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyEstimateOfPossibleLoss

us-gaap:NumberOfCountriesInWhichEntityOperates

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:TaxPeriod

us-gaap:OtherAssetsMiscellaneous

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType
dei:LegalEntity, us-gaap:Energy
us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted
dei:LegalEntity, us-gaap:LongTermContractForPurchaseOfElectricPower
dei:LegalEntity, us-gaap:PurchaseCommitmentExcludingLongtermCommitment
dei:LegalEntity, us-gaap:StatementScenario, us-gaap:LongTermContractForPurchaseOfElectricPower
us-gaap:StatementBusinessSegments
us-gaap:RestructuringAndRelatedCostCostIncurredToDate1

us-gaap:RestructuringAndRelatedCostExpectedCostRemaining1
us-gaap:BalanceSheetLocation, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:RestructuringReserve
us-gaap:StatementBusinessSegments
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:IncomeTaxAuthority, us-gaap:TaxPeriod
us-gaap:TaxCreditCarryforwardAmount
us-gaap:StatementGeographical
us-gaap:TaxCreditCarryforwardValuationAllowance

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
Liabilities
Operating Lease Liability
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Inventory Write Down
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
InventoryNet
Inventory Work In Process Net Of Reserves
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ████████████████████▇▇▇▇▇▇▇▇▇▇██████▁▁▁▁▁▁▁3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.9NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁31.402431.3405NA31.142531.006730.91NA30.831930.809330.7167NA30.722830.705930.6197NA30.569530.546730.4873NA30.458830.447730.4227NA30.408630.39730.2932NA30.225530.210730.7782NA31.280331.259531.1089NA31.052615.62316.0287NA16.095617.003417.5372NA18.007218.137518.1644
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁31.045130.9742NA30.909730.792630.7123NA30.662830.661430.6206NA30.569630.565830.4886NA30.422830.412930.3647NA30.316430.313230.2949NA30.275430.274330.1783NA30.098330.096530.6659NA31.092631.097330.9456NA30.659915.445115.8735NA15.957116.887417.4328NA17.64117.820217.8078
us-gaap:EarningsPerShareBasic ▃▄▄▄▄▄▄▄▄▄▃▅▄▄▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▂▄▄▄▄▄▅▄█▄▅▄▄▅▄▅0.060.690.490.780.690.720.650.90.660.570.231.330.840.67-0.90.840.730.450.550.620.850.690.720.850.760.620.610.760.820.75-0.310.930.850.960.530.891.330.912.860.581.150.910.761.00.81.04
us-gaap:EarningsPerShareDiluted ▃▄▄▄▄▄▄▄▄▄▃▅▄▄▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▂▄▄▄▄▄▅▄█▄▅▄▄▅▄▅0.060.680.480.780.680.720.640.90.660.560.231.330.830.67-0.890.840.720.450.550.610.850.690.720.850.760.610.610.760.810.75-0.30.920.840.960.530.871.320.92.840.571.140.910.750.980.781.02
 us-gaap:EarningsPerShareBasicAndDiluted us-gaap:RestructuringCostAndReserve us-gaap:FacilityClosingNANANA-0.03NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare NANA4.9e-077.8e-076.9e-077.2e-076.5e-079.000000000000001e-076.6e-075.699999999999999e-072.3000000000000002e-071.33e-068.4e-076.800000000000001e-07-9.000000000000001e-078.4e-077.3e-074.5000000000000003e-075.5e-076.2e-078.5e-076.9e-077.1e-078.4e-078.000000000000001e-076.2e-076.1e-077.6e-078.2e-077.5e-07-3.5e-079.399999999999999e-079.399999999999999e-079.8e-076.5e-078.900000000000001e-071.33e-069.100000000000001e-072.48e-066e-071.19e-069.300000000000001e-078.2e-071.16e-068.5e-071.1100000000000002e-06
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare NANA4.8e-077.8e-076.800000000000001e-077.2e-076.4e-079.000000000000001e-076.6e-075.6e-072.3000000000000002e-071.33e-068.3e-076.800000000000001e-07-8.900000000000001e-078.4e-077.2e-074.5000000000000003e-075.5e-076.1e-078.5e-076.9e-077.1e-078.4e-078.000000000000001e-076.1e-076.1e-077.6e-078.100000000000001e-077.5e-07-3.5e-079.300000000000001e-079.300000000000001e-079.8e-076.5e-078.7e-071.32e-069.000000000000001e-072.46e-066e-071.17e-069.300000000000001e-078.000000000000001e-071.1399999999999999e-068.3e-071.0900000000000002e-06
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,swm:AdvancedMaterialsStructuresSegment█▅▅▄▄▄▃▄▄▄▃▄▄▃▃▄▄▃▂▂▂▂▂▁▁▁252.0163.0148.9138.9132.8122.9103.9126.1126.7120.5107.8120.8124.0115.399.2116.2117.8100.065.172.572.071.057.142.040.640.5NANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,swm:EngineeredPapersSegment▂▂▃▅▁▅▄▃▆▅▅▅▇▇▄▆▅▄▄▄▆▆█▆▅▇125.8125.2130.5140.4121.4138.6134.6130.3143.2137.5140.9139.5146.4146.6136.5141.6137.5133.3133.6136.8145.3143.6152.7142.4141.3147.5NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▃▆▄▆▆▆▅▆▇▅▅▅▇▆▄▆▇▅▂▅▆▅▅▅▄▄▃▅▅▆▁▇▇▇▅▇▆▄█▃▅▅▄15.933.523.337.034.434.124.834.644.230.426.831.142.135.020.138.539.526.66.230.837.531.624.731.824.022.517.325.230.533.1-0.741.842.141.729.843.735.524.450.011.231.626.422.9NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▅▆▇▇▆▅▇▅▆▆▄▇▄▇▃▇▇▆▄▆▆█▆▅▇▁▂▃▆▆▅█▅▆▆█▄▆▇▂▇▇▅█▄▅11.217.831.633.322.86.832.714.322.618.11.838.4-7.231.3-11.735.238.922.0-6.220.224.446.518.57.339.6-40.6-21.9-14.628.126.64.245.815.421.124.441.1-5.028.433.6-31.332.332.06.847.3-0.66.6
us-gaap:CostOfGoodsAndServicesSold █▃▃▃▂▂▁▂▂▂▂▃▂▂▁▂▂289.7207.4199.9199.1179.9187.2167.6184.2190.9190.1184.9195.0193.0189.9168.6181.8178.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense █▅▆▃▄▄▅▃▃▄▃▃▃▃▄▃▃▃▃▃▂▃▄▁▂▂▂▂▂▂▂▁▁▁▂▁▂▁▂▂▂▁▁▁▁▁52.632.739.024.625.927.433.124.322.125.624.821.321.423.429.223.822.722.724.320.817.719.427.310.316.816.216.015.315.814.814.312.512.910.616.512.013.413.117.914.614.912.712.211.510.711.7
us-gaap:GrossProfit █▇▇▇▆▆▅▅▇▅▄▄▆▅▅▆▆▄▄▄▅▄▄▂▃▂▂▂▃▃▄▄▄▄▄▄▄▄▇▃▃▁▁▂▁▂88.180.879.580.274.374.370.972.279.067.963.865.377.472.066.875.876.663.163.263.166.963.565.852.454.851.449.152.959.257.661.963.264.962.761.163.862.564.481.956.355.147.248.349.545.353.5
us-gaap:IncomeLossFromContinuingOperations NANA15.324.521.522.520.227.720.517.47.240.925.820.9-27.325.722.313.717.018.726.021.121.625.624.518.818.423.125.023.2-11.229.629.430.720.327.721.014.641.29.520.316.614.621.215.819.8
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▁▅▃▅▅▅▄▅▅▄▄▆▆▅▃▆▆▄▁▅▆▅▄▆▅▄▄▅▆▆▁▇▇▇▅▇▆▄█▂▅▅▄▆▄▅2.528.015.328.226.027.818.929.626.422.018.335.035.028.513.735.231.920.72.127.634.429.323.031.428.222.918.526.131.232.41.141.742.642.330.643.134.123.847.69.030.826.623.231.124.229.5
us-gaap:IncomeTaxExpenseBenefit ▃▄▃▃▃▃▃▃▃▃▃▂▄▃█▄▄▃▁▄▄▄▃▃▃▃▃▃▃▄▄▄▄▄▄▅▄▄▄▃▄▄▄▄▄▄3.57.42.94.85.45.32.43.25.24.40.3-5.68.77.343.19.59.97.1-12.510.79.18.13.75.96.55.51.92.36.59.813.013.813.812.412.016.713.59.77.70.911.610.99.710.79.110.3
us-gaap:IncomeTaxesPaidNet ██████████████████████████▁12.22.03.82.95.82.33.73.510.33.32.66.111.13.47.37.613.49.87.56.416.71.313.00.3-3.0-1.0-30446.4NANA4.3-58454.8NANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▇▂▅▅▅▄▄▄█▅▅▄▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁13.12.97.77.88.16.96.56.715.17.88.17.36.66.26.97.46.85.84.03.94.14.64.41.71.91.71.81.82.11.50.90.60.70.70.70.90.90.90.81.10.70.00.40.40.60.4
us-gaap:InterestPaidNet █▁▆▂▅▁▅▁▅▂▂▃▃▃▄18.31.413.53.811.82.311.52.112.03.53.47.17.26.37.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▄▆▅▆▆▆▅▆▅▅▄▇▆▅▁▆▆▅▅▅▆▆▆▆▆▅▅▆▆▆▃▆▆▆▅▆▆▅█▄▅▅▅▅▅▅1.821.615.324.521.522.520.227.720.517.47.241.025.820.5-27.325.822.313.717.018.726.021.121.725.823.418.818.523.025.023.2-9.729.126.630.116.527.721.014.647.69.019.816.213.718.214.818.6
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▄▆▅▆▆▆▅▆▅▅▄▇▆▅▁▆▆▅▅▅▆▆▆▆▆▅▅▆▆▆▃▆▆▆▅▆▆▅█▄▅▅▅▅▅1.721.415.124.221.222.220.027.620.317.37.240.725.620.4-27.225.622.113.616.918.625.821.021.625.823.118.618.422.824.723.0-9.528.826.429.816.227.420.714.447.09.019.519.813.517.714.8NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted 1.7NANANA21.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▂▁▂▂▂▃▃▃▁▂▂█▂▂▃▄▂▂▂▃▃▄▄▃▅▃▄▄▄▃▄▃▃▃▃▃▂▃▂▂▂▂▃▃▂▂-0.3-2.6-0.3-1.0-0.30.60.61.7-2.7-0.6-0.411.2-0.5-0.30.54.1-0.8-0.1-0.10.71.02.32.71.36.12.13.02.72.80.82.70.51.21.31.50.3-0.50.3-1.6-1.1-0.10.20.70.8-0.2-1.1
us-gaap:OperatingIncomeLoss ▃▆▄▆▆▆▅▆▇▅▅▅▇▆▄▆▇▅▂▅▆▅▅▅▄▄▃▅▅▆▁▇▇▇▅▇▆▄█▃▅▅▄▅▅▅15.933.523.337.034.434.124.834.644.230.426.831.142.135.020.138.539.526.66.230.837.531.624.731.824.022.517.325.230.533.1-0.741.842.141.729.843.735.524.450.011.231.626.422.930.725.031.0
us-gaap:ResearchAndDevelopmentExpense █▅▄▄▄▃▄▃▄▄▄▄▅▅▇▅▆▆▆▆▆▆▄▄▄▄▅▄▆▅▆▄▄▅▃▂▂▁▂▂▂▁▂▁▁▁5.43.83.43.63.63.23.43.13.73.33.43.64.14.14.93.94.64.44.64.24.44.33.53.53.73.33.83.64.24.14.23.63.73.82.82.42.62.22.62.32.42.02.32.12.12.0
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▅▅▅▄▄▃▄▄▄▃▄▄▄▃▄▄▃▂▂▂▂▂▁▁▁▁▂▂▂▂▁▂▁▂▂▂▂▂▂▂▁▁▁▁▁377.8288.2279.4279.3254.2261.5238.5256.4269.9258.0248.7260.3270.4261.9235.7257.8255.3233.3198.7209.3217.3214.6209.8184.4181.9188.0181.7204.3203.6204.7196.5185.3196.5194.5196.8202.0198.8202.1218.1211.2206.2180.7182.8182.0182.6192.8
us-gaap:Revenues █▅▅▅▄▄▃▄▄▄▃▄▄▄▃▄▄▃▂▂▂▂▂▁▁▁▁▂▂▂▂▁▂▁▂▂▂▂▂▂▂▁▁▁▁▁377.8288.2279.4279.3254.2261.5238.5256.4269.9258.0248.7260.3270.4261.9235.7257.8255.3233.3198.7209.3217.3214.6209.8184.4181.9188.0181.7204.3203.6204.7196.5185.3196.5194.5196.8202.0198.8202.1218.1211.2206.2180.7182.8182.0182.6192.8
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▂▃▃▃▃▂▂▂▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁2423.31587.51584.91590.61578.11655.21471.71450.21489.41485.71466.51487.31485.11547.21542.51532.01511.01487.51173.71204.91243.51330.01290.01119.91114.81134.11186.61228.61263.91247.71224.4940.8919.0905.1886.7872.4842.2860.6845.2838.1906.0883.5850.4NANANA
us-gaap:Liabilities █▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁1770.3934.6935.3962.1970.71063.2874.0875.4916.8923.6908.6918.6942.6985.1995.8962.9966.3969.8665.4679.5727.2827.2822.1659.9650.7699.4697.6707.7718.8721.4663.0373.8389.5382.4374.9386.7390.1378.5369.3397.1416.2365.9326.2NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▂▃▃▃▃▂▂▂▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁2423.31587.51584.91590.61578.11655.21471.71450.21489.41485.71466.51487.31485.11547.21542.51532.01511.01487.51173.71204.91243.51330.01290.01119.91114.81134.11186.61228.61263.91247.71224.4940.8919.0905.1886.7872.4842.2860.6845.2838.1906.0883.5850.4NANANA
us-gaap:StockholdersEquity ███▇▇▆▆▅▅▅▅▅▄▅▅▅▅▄▃▄▄▃▂▂▂▁▃▄▅▄▅▅▄▄▃▃▂▃▂▁▃▄▄▄▃▃653.0652.9649.6628.5607.4592.0597.7574.8572.6562.1557.9568.7542.5562.1546.7569.1544.7517.7508.3525.4516.3502.8467.9460.0464.1434.7489.0520.9545.1526.3561.4567.0529.5522.7511.8485.7452.1482.1475.9441.0489.8517.6524.2517.0487.8489.8
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent █▄▃▄▃▅▄▄▄▄▄▄▃▄▄▄▄▃▂▂▃▅▄▆▆▆▆███▇▅▅▄▃▂▂▂▁▁▁▁▁578.7428.1396.4422.4404.4473.7427.5418.9441.7430.4429.2421.7406.4435.3433.1433.5419.7403.5364.3363.1405.2477.1444.8510.9494.2506.7519.4562.3575.2560.0537.1456.1446.1423.0382.0362.6336.8340.3327.0314.1326.6325.2312.8NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁▁▁▁▃▂▂▂▂▂▂▂▂▃▂▂▂▃▂▄▅▅▇▇▇████▇▆▆▅▄▃▂▂▂▁▁▂▂▂▂▁65.963.754.766.363.9126.7103.084.987.883.493.890.573.996.1106.9100.697.899.8107.489.5143.8200.2186.5268.5257.7267.3290.3286.0291.4277.9272.0222.5212.7181.1151.2117.888.585.376.561.362.177.287.380.791.969.9
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▂▁▂▂█▆▄▄▄▅▄▃▅▆65.963.754.766.363.9126.7103.084.987.883.493.890.573.996.1106.9NANANA107.4NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent █▅▄▅▄▅▄▄▅▅▄▄▄▅▄▅▄▃▂▃▃▃▂▂▂▂▁▃▃▃▂▁▁▁▁▂▂▂▂▂▂▁▁229.4172.9148.5166.5151.3170.4143.2156.9166.6164.2154.6161.0159.4164.5149.4163.2153.2141.7115.1137.0126.6137.4119.4119.1106.7114.893.9130.8124.2126.9107.6100.796.7101.795.4106.2106.6110.5112.3117.9113.5101.698.9NANANA
us-gaap:InventoryNet █▄▅▄▄▄▄▃▄▄▃▃▄▄▄▃▃▃▂▂▁▂▂▁▁▁▁▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂247.0173.3179.7172.8172.1159.5161.4149.4154.2154.5151.5150.9153.7152.9155.2143.9141.7136.8119.4110.9108.1111.0112.4102.4106.1100.2108.4112.3130.4131.2132.8111.0112.3112.2111.6119.1120.6122.1113.8111.8125.8124.2113.8NANANA
us-gaap:OtherAssetsCurrent █▇▃▃▄▅▃▂▃▃▂▂▃▃▂▃▃▃▂▂▂▂▂▂▃▄▂▂▂▂▂▃▄█▄▁▁▂▁▅▆▆▅17.714.97.37.28.911.27.45.56.97.85.15.37.28.15.46.98.08.25.15.66.06.24.65.66.59.16.15.85.76.24.78.110.016.810.33.84.14.53.311.613.912.911.9NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NoncurrentAssets NANA351.9NANANA342.2NANANA348.5NANANA369.3NANANA311.8NANANA310.6NANANA365.8NANANA400.0NANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:BRNANA15.2NANANA19.5NANANA20.8NANANA24.2NANANA23.7NANANA20.1NANANA27.8NANANA35.1NANANA43.1NANANA49.6NANANA58.1NANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:FRNANA169.3NANANA158.8NANANA167.4NANANA181.3NANANA162.7NANANA163.5NANANA187.2NANANA210.2NANANA204.5NANANA208.6NANANA224.9NANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:PLNANA12.9NANANA14.7NANANA16.8NANANA21.9NANANA20.0NANANA23.6NANANA29.0NANANA32.8NANANA27.4NANANA24.8NANANA18.8NANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:USNANA122.1NANANA118.5NANANA115.8NANANA115.0NANANA89.6NANANA87.5NANANA75.5NANANA86.8NANANA54.4NANANA72.1NANANA84.9NANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical swm:OtherForeignCountriesNANA32.4NANANA30.7NANANA27.7NANANA26.9NANANA15.8NANANA15.9NANANA15.5NANANA3.6NANANA0.0NANANANANANANANANANANA
 us-gaap:AssetsNoncurrent dei:EntityByLocation,us-gaap:RelatedPartyTransactionsByRelatedParty country:CN,us-gaap:CorporateJointVentureNANA166.6NANANA168.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AmortizationOfIntangibleAssets █▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▅▄▃▃▃▃▃▂▂▂▂▂▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁10.76.56.56.86.45.35.05.15.15.15.15.25.25.25.25.25.55.03.13.03.13.12.41.11.01.10.80.80.70.80.40.00.10.10.30.30.20.30.50.30.40.40.50.40.4NA
us-gaap:PropertyPlantAndEquipmentNet █▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃▂▁▁▁▁▁▁▁▂▃▄▄▅▅▄▄▄▅▅▅▆▆▆██▇476.3324.1339.0327.7325.5324.9330.3320.0333.4333.4340.3343.7346.7363.7361.9359.8354.1342.9307.4308.9307.1312.7308.1313.4318.7325.0362.0369.6389.7391.8393.2384.6374.5381.1401.4402.7396.6420.4428.8439.9474.7464.7440.8NANANA
us-gaap:Goodwill █▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁666.7401.8403.7400.3397.9396.5337.4335.8338.0338.3338.1338.7339.9343.2341.3340.1338.5337.0229.5232.4232.5233.6233.3124.5125.3124.5125.5120.7121.0121.1118.75.95.75.55.75.65.45.85.65.96.3NA5.8NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:TradeNames,swm:AdvancedMaterialsStructuresSegment▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁████20.220.120.520.119.919.819.919.820.019.920.020.120.220.520.420.320.320.113.035.635.635.635.6NANANA21.8NANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill █▄▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▂▃▃▃▃▁▁▁▁▁▁▁▁541.7304.8314.7317.4321.2329.8251.2254.5262.3266.6272.8279.0284.7294.2297.2301.1303.6307.1177.5203.5206.9210.6213.985.687.187.789.378.479.280.080.7NANANA0.4NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:CustomerRelationships,swm:AdvancedMaterialsStructuresSegment█▃▄▄▄▄▂▂▃▃▃▃▃▃▃▃▃▄▁▁▁▁▁440.2246.2254.2256.7259.9267.4206.8209.8216.3220.0225.2230.5235.1243.1245.7249.0251.0253.5149.3152.9155.5158.6161.3NANANA50.3NANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:DevelopedTechnologyRights,swm:AdvancedMaterialsStructuresSegment█▃▃▃▃▃▂▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁62.527.028.228.729.229.722.723.124.024.625.325.926.727.728.128.628.929.511.912.312.813.213.6NANANA14.8NANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:NoncompeteAgreements,swm:AdvancedMaterialsStructuresSegment▁▁▁▁▁▂▂▂▃▃▄▄▅▆▆▆▇█▄▄▄▅▅0.50.50.50.60.60.70.70.70.91.01.21.31.51.71.81.92.12.31.21.31.41.51.6NANANA0.0NANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:Patents,swm:AdvancedMaterialsStructuresSegment▁▁▂▂▂▂▄▄▄▄▄▅▅▅▅▇▇▇▇▇███0.90.91.01.01.01.01.11.11.11.11.11.21.21.21.21.31.31.31.31.31.41.41.4NANANA1.5NANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:StatementBusinessSegments us-gaap:TradeNames,swm:AdvancedMaterialsStructuresSegment█▅▅▅▅▆▁▁▁▁▁▁▁▁▁▁▁▁▁17.410.110.310.310.611.20.00.00.00.00.00.00.00.00.00.00.00.40.8NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:StatementBusinessSegments swm:AdvancedMaterialsStructuresSegment█▃▄▄▄▄▂▂▃▃▃▃▃▃▃▃▃▃▁521.5284.7294.2297.3301.3310.0231.3234.7242.3246.7252.8258.9264.5273.7276.8280.8283.3287.0164.5NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA19.8NANANA20.922.023.424.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▅▆▅▆▆▆▆▅▅▂▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▅▄▄95.968.569.265.972.474.169.269.662.664.433.939.840.039.339.530.229.028.527.527.025.724.822.319.221.321.222.630.732.029.431.625.425.824.925.528.429.833.531.834.063.356.455.7NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent █▄▃▄▃▄▄▄▃▄▄▃▃▃▃▃▃▄▂▂▂▂▂▁▁▂▂▂▂▂▂▁▂▂▂▂▂▃▃▃▃▃▄113.466.660.566.953.167.766.464.160.972.165.758.660.861.259.456.958.866.250.347.142.445.249.039.937.242.944.846.850.048.647.035.847.643.345.648.249.554.853.757.356.859.066.4NANANA
us-gaap:AccruedIncomeTaxesCurrent ▄▄▂▂▃▃▂▁▂▂▂▁▂▄▃▂▁▃▄▇▃█▄▁▂5.84.92.72.93.43.02.81.11.41.41.61.12.55.34.01.90.54.45.39.43.311.75.31.22.7NA0.0NANANA0.00.00.07.01.3NANA5.20.0NANANANANANANA
us-gaap:AccruedLiabilitiesCurrent █▄▇▅▃▂▅▃▃▁▃▃▂▂▃▄▂▂▃▂▂▃▅▃▃▃▃▄▄▅▆▄▃▃▃▃▃▃▄▅▅▆█106.983.5100.986.877.669.886.577.477.963.172.973.469.968.878.679.271.170.477.270.766.976.185.577.876.578.375.880.781.486.392.781.774.875.475.875.473.278.482.187.090.394.1105.6NANANA
us-gaap:DebtCurrent █▁▁▁▁▁▁▁▁▂▂▂▁▂▂▂▂▁▁▂▂▂▂▂▂▂▁▄▂▄▂▂▂▂▂▃▂▂▂▂▄▄▄18.32.72.82.72.61.91.91.91.93.13.33.23.03.85.13.54.32.93.03.23.73.53.33.13.23.22.98.94.28.24.24.63.34.64.27.43.23.35.05.08.79.28.7NANANA
us-gaap:LiabilitiesCurrent █▃▄▃▂▂▃▃▂▂▂▂▂▂▃▂▂▃▂▂▁▂▂▁▁▁▁▂▂▂▃▁▂▂▂▂▂▂▂▃▃▄▅244.4157.7166.9159.3136.7142.4157.6144.5142.1139.7143.5136.3136.2139.1147.1141.5134.7143.9135.8130.4116.3136.5143.1122.0119.6124.4123.5136.4135.6143.1143.9122.1125.7130.3126.9131.0125.9141.7140.8149.3156.9165.9186.7NANANA
us-gaap:LongTermDebtCurrent NANA2.82.72.61.91.91.91.93.13.33.23.03.85.13.54.32.93.03.23.73.53.33.13.23.22.98.94.28.24.24.63.34.64.27.43.23.35.0-5.0-8.7NA-8.7NANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA5.2NANANA4.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA52.2NANANA40.4NANANA29.8NANANA31.7NANANA38.0NANANA47.2NANANA48.9NANANA43.7NANANA26.4NANANA28.5NANANA43.1NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:LiabilitiesNoncurrent dei:EntityByLocation,us-gaap:RelatedPartyTransactionsByRelatedParty country:CN,us-gaap:CorporateJointVentureNANA60.2NANANA88.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebt NANA597.9632.9669.0754.7542.7561.6606.6620.3622.1640.8642.8674.6690.0694.0721.1726.1447.4451.7518.3590.6580.2400.1398.1442.8440.1446.8449.1447.6385.4151.2164.5161.9156.0166.4174.1147.5146.0164.9166.0NA51.8NANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument swm:TermLoanBNA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType swm:TermLoanFacilityB,us-gaap:SecuredDebt350.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent NA615.2590.5630.2666.4752.8540.8559.7604.7617.2618.8637.6639.8670.8679.1690.5716.8723.2437.4441.1506.8578.8568.2397.0394.9439.6437.2437.9444.9439.4381.2146.6161.2157.3151.8159.0170.9144.2141.0159.9157.3101.543.1NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations █▁▁1262.6615.2590.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▁▁▁▁▁▁▁▁▁▁112.245.045.148.746.445.148.246.947.047.048.0NANANA52.0NANANA39.2NANANA74.2NANANA82.9NANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▆▄▄▃▃▂▂▁▁▁▁▂▂▂▂▄▄▃▃▃▃▄▃▅▄▃▃▁▂▂▂▅▅▅▆▆▆▇▆▅██▇43.335.336.533.632.231.331.628.028.628.028.228.928.730.030.735.535.033.433.133.133.336.233.538.136.133.034.127.228.928.928.738.440.240.041.541.243.044.542.340.047.947.646.3NANANA
us-gaap:OtherLiabilitiesNoncurrent █▅▇▆▆▆▆▆▆▆▃▄▅▅▅▄▄▃▂▂▂▂▂▂▂▃▂▁▂▂▂▂▂▁▂▂▂▁▁▁▁▁▁91.263.778.672.771.473.474.470.768.866.143.147.458.963.259.955.146.939.329.326.626.528.832.034.532.836.031.425.526.327.328.329.629.125.326.326.526.025.025.425.021.220.821.2NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANA15.6NANANA17.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA5.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA3.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA2.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA5.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ███▇▇▆▆▅▅▅▅▅▄▅▅▅▅▄▃▄▄▃▂▂▂▁▃▄▅▄▅▅▄▄▃▃▂▃▂▁▃▄▄▄▃▃653.0652.9649.6628.5607.4592.0597.7574.8572.6562.1557.9568.7542.5562.1546.7569.1544.7517.7508.3525.4516.3502.8467.9460.0464.1434.7489.0520.9545.1526.3561.4567.0529.5522.7511.8485.7452.1482.1475.9441.0489.8517.6524.2517.0487.8489.8
us-gaap:CommonStockValue ████████████████████▇▇▇▇▇▇▇▇▇▇██████▁▁▁▁▁▁▁3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.9NANANA
us-gaap:AdditionalPaidInCapital ▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁███████97.394.692.288.887.281.078.875.173.672.071.170.068.867.866.363.761.560.659.257.256.254.953.752.151.950.649.848.346.945.043.341.940.739.941.034.6211.6210.1211.7208.0206.8205.8208.8NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █████▇▇▇▇▇▇▇▆▆▆▇▆▆▆▆▆▆▆▅▅▅▅▅▄▄▅▅▅▅▄▄▃▃▃▂▂▁▁658.9670.9666.2664.8654.1646.2638.4631.7617.6610.8608.2609.8582.2569.8566.7607.3594.5585.0585.3581.2574.7560.9552.6543.1528.9517.0512.7505.7493.7479.9520.0540.9521.3504.1483.4471.6449.7431.1418.9373.7367.1349.9336.4NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▂▂▂▁▁▂▁▂▂▂▂▂▄▃▂▂▁▁▂▂▂▁▁▂▁▄▅▇▇▇▆▅▆▆▆▅▆▆▆█▇▇-106.3-115.7-111.9-128.2-137.0-138.3-122.6-135.1-121.7-123.8-124.5-114.2-111.6-78.6-89.4-105.0-114.4-131.0-139.3-116.1-117.6-116.0-141.4-138.2-119.7-135.9-76.5-36.11.5-1.6-5.0-18.9-35.6-24.4-15.4-23.3-36.7-10.7-24.5-10.529.817.31.5NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▆▅▇▄▅▅█▄▄▃▃▃▃▄▆▅▃▃▅▃▃▃▄▁▂▃▄▃▄▃▃▃▂▁▅▄▄▄▂▃▃▃▅▅▄▅2.52.13.11.42.02.13.71.51.50.91.11.11.01.42.62.10.91.32.00.91.31.31.60.20.51.01.51.31.91.11.21.20.70.12.41.41.51.60.81.01.10.92.12.11.42.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▂▆▇▅▁▅▇▅▂▅▅▄▃▅▆▄▂▅▄▄▃▇▃▅▂█▄▅▃▆▅▅▅▆▆▃▆▅▃▂▁▄▄▅▄7.112.754.158.244.25.141.463.942.013.045.937.134.122.037.748.431.913.046.730.834.617.664.524.544.511.274.134.439.118.355.041.340.541.352.250.123.948.443.625.712.4-0.235.930.543.331.4
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁████▆███████████▅████▅███▇███▅███████████████-641.7-7.3-12.6-6.7-7.5-176.38.0-5.6-9.6-7.6-9.2-3.3-7.8-7.2-9.31.6-4.9-305.9-7.4-6.3-3.2-5.5-301.5-4.6-3.7-3.9-40.2-6.3-16.4-11.6-233.6-10.2-1.3-8.6-8.7-3.7-22.8-16.5-16.4-8.7-20.5-26.5-27.6-23.7-20.4-9.5
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▁▁▄▂▁▂▂▂▂▂▂▂▁▂▅▂▁▁▂▃▂▁▂▂▂▂▂▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂636.24.5-54.6-50.6-100.3196.9-33.1-59.2-28.2-15.3-32.8-16.8-44.5-26.8-24.3-48.6-31.7284.1-16.7-79.0-84.4-5.6161.9-9.7-58.2-1.6-17.6-11.5-9.6-0.4222.2-24.6-7.5-2.8-12.2-17.62.5-23.3-11.6-16.2-7.116.6-1.7-19.2-0.4-9.5
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▆▇▅▆▁██▆▆▅▆▇▄▅2.29.0-11.62.4-62.823.718.1-2.94.4-10.43.316.6-22.2-10.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:AmortizationOfFinancingCosts us-gaap:IncomeStatementLocation us-gaap:InterestExpense█▂▂▃▂▂▂▂▂▂▂▃▃▃▃▃▃▃▃▃▆▃▃▁▂▁1.30.30.30.40.30.30.30.30.30.30.30.50.40.50.40.50.50.40.40.40.90.40.50.10.20.1NANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization █▄▅▅▄▃▃▃▃▃▃▄▃▄▃▃▃▄▂▂▂▂▂▁▁▁▂▂▂▃▂▁▁▁▁▁▁▂▂▂▂▂▂▁▂▂28.016.919.919.817.215.314.314.514.514.414.815.815.415.612.814.815.316.611.211.211.310.812.09.59.89.710.211.310.513.110.38.99.68.59.69.89.810.210.611.510.810.710.49.79.910.0
us-gaap:IncreaseDecreaseInAccountsPayable NA11.3-12.412.6-14.21.3-4.44.5-9.77.56.3-2.82.42.13.5-1.94.0-0.9-1.24.3-2.5-4.34.53.6-5.94.3-0.5-0.21.52.35.2-7.4-1.11.8-3.5-2.2-2.10.0-1.32.42.7-8.3NANANANA
us-gaap:IncreaseDecreaseInInventories █▄▆▃█▁▇▄▄▅▅▄▆▄▆▄▅▄█12.9-1.85.2-3.112.2-10.89.4-0.8-1.44.01.7-2.27.1-1.77.8-0.91.7-2.211.8NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▂▆▇▅▁▅▇▅▂▅▅▄▃▅▆▄▂▅▄▄▃▇▃▅▂█▄▅▃▆▅▅▅▆▆▃▆▅▃▂▁▄▄▅▄7.112.754.158.244.25.141.463.942.013.045.937.134.122.037.748.431.913.046.730.834.617.664.524.544.511.274.134.439.118.355.041.340.541.352.250.123.948.443.625.712.4-0.235.930.543.331.4
us-gaap:NetIncomeLoss ▄▆▅▆▆▆▅▆▅▅▄▇▆▅▁▆▆▅▅▅▆▆▆▆▆▅▅▆▆▆▃▆▆▆▅▆▆▅█▄▅▅▅▅▅▅1.821.615.324.521.522.520.227.720.517.47.241.025.820.5-27.325.822.313.717.018.726.021.121.725.823.418.818.523.025.023.2-9.729.126.630.116.527.721.014.647.69.019.816.213.718.214.818.6
us-gaap:ShareBasedCompensation ▆▅▇▄▅▅█▄▄▃▃▃▃▄▆▅▂▄▅▃▃▄▄▁▂▃▄▃▄▃▃▃▂▁▅▄▄▄▂▃▃▃▅▅▄▅2.52.13.21.42.02.23.71.51.60.91.11.21.01.52.62.30.81.42.11.01.31.41.70.20.61.01.61.31.91.11.21.20.70.12.41.41.51.60.81.01.10.92.12.11.42.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁████▆███████████▅████▅███▇███▅███████████████-641.7-7.3-12.6-6.7-7.5-176.38.0-5.6-9.6-7.6-9.2-3.3-7.8-7.2-9.31.6-4.9-305.9-7.4-6.3-3.2-5.5-301.5-4.6-3.7-3.9-40.2-6.3-16.4-11.6-233.6-10.2-1.3-8.6-8.7-3.7-22.8-16.5-16.4-8.7-20.5-26.5-27.6-23.7-20.4-9.5
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄█▁▅▅▇▂▄9.27.19.45.87.57.48.64.87.97.37.26.17.76.09.78.28.211.110.37.85.24.510.24.93.95.28.911.17.08.18.911.03.65.66.86.46.27.89.094.0-69.827.728.071.5-35.79.9
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▁▁▄▂▁▂▂▂▂▂▂▂▁▂▅▂▁▁▂▃▂▁▂▂▂▂▂▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂636.24.5-54.6-50.6-100.3196.9-33.1-59.2-28.2-15.3-32.8-16.8-44.5-26.8-24.3-48.6-31.7284.1-16.7-79.0-84.4-5.6161.9-9.7-58.2-1.6-17.6-11.5-9.6-0.4222.2-24.6-7.5-2.8-12.2-17.62.5-23.3-11.6-16.2-7.116.6-1.7-19.2-0.4-9.5
us-gaap:ProceedsFromIssuanceOfLongTermDebt █▁▁▁▁▃▁▁▁▁▁█▁▁▁▃▁▄▁▁▁▁▆▁▁▁▁▁▂▂▅▁▁▁▁▁▁▁▁▁▃▂▁▁▁▁678.725.00.00.70.0212.019.00.00.10.0-1.9635.30.80.00.1152.61.3286.50.04.04.527.1452.78.112.315.113.05.393.0117.0402.222.021.310.13.20.132.67.18.014.2148.456.10.10.14.343.7
us-gaap:RepaymentsOfLongTermDebt ▂▂▂▂▃▂▂▂▂▂▂█▂▂▂▄▂▂▂▃▃▂▅▂▃▂▂▂▃▃▄▂▂▂▂▂▂▂▂▄▁▂▂▃▁▃17.20.640.737.586.70.438.645.614.70.617.1635.431.89.712.6187.38.20.73.870.377.119.8270.66.158.93.113.211.287.458.8168.638.218.23.111.513.31.95.125.2198.3-95.20.20.4111.5-108.152.5
us-gaap:PaymentsOfDividends ▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅█▃▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▃▃▃▅▁▃▃▅▁▃13.813.813.813.813.713.713.613.613.613.613.513.313.213.213.212.925.80.012.812.212.212.212.211.611.511.611.511.010.911.111.29.59.49.44.74.62.42.42.413.0-8.02.72.713.5-8.12.7
us-gaap:PaymentsForRepurchaseOfCommonStock ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄█▁▅▄▄▄▄0.03.10.10.0-0.11.0-0.10.00.10.90.20.10.22.50.10.1-0.11.10.10.00.00.60.00.00.02.90.0-0.10.352.30.00.00.01.70.04.324.121.60.0225.4-150.345.80.019.8-1.40.6
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.9
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.20.20.30.30.30.30.20.20.20.30.30.30.30.30.40.20.20.20.20.20.20.2

us-gaap:CommonStockValue us-gaap:DebtInstrument, us-gaap:SubsequentEventType

swm:Scapa, us-gaap:SubsequentEvent


Common
Period End2021-04-152021-01-27
Value412402
Percentage of CommonStockValue0.00.0
Percentage of Assets0.00.0
Percentage of Assets swm:Scapa us-gaap:SubsequentEvent0.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value3131313130303030303030303030303030303030303030313131311516161717181818
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value3130303030303030303030303030303030303030303030313130301515151617171717
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.060.690.490.780.690.720.650.90.660.570.231.330.840.67-0.90.840.730.450.550.620.850.690.720.850.760.620.610.760.820.75-0.310.930.850.960.530.891.330.912.860.581.150.910.761.00.81.04
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.060.680.480.780.680.720.640.90.660.560.231.330.830.67-0.890.840.720.450.550.610.850.690.720.850.760.610.610.760.810.75-0.30.920.840.960.530.871.320.92.840.571.140.910.750.980.781.02
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted us-gaap:RestructuringCostAndReserve

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:FacilityClosing


Earnings
Period End2020-09-30
Value-0.03
Percentage of EarningsPerShareBasicAndDiluted100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.490.780.690.720.650.90.660.570.231.330.840.68-0.90.840.730.450.550.620.850.690.710.840.80.620.610.760.820.75-0.350.940.940.980.650.891.330.912.480.61.190.930.821.160.851.11
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.480.780.680.720.640.90.660.560.231.330.830.68-0.890.840.720.450.550.610.850.690.710.840.80.610.610.760.810.75-0.350.930.930.980.650.871.320.92.460.61.170.930.81.140.831.09
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11173133226.8321422181.838-7.231-11.7353822-6.2202446187.339-40.6-21.9-14.628264.24515212441-5.02833-31.332326.847-0.66.6
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.06.211.311.99.02.613.75.68.47.00.714.8-2.712.0-5.013.715.29.4-3.19.711.221.78.84.021.8-21.6-12.1-7.113.813.02.124.77.810.812.420.3-2.514.115.4-14.815.717.73.726.0-0.33.4

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value289207199199179187167184190190184195193189168181178
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax76.772.071.571.370.871.670.371.870.773.774.374.971.472.571.570.569.9

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52323924252733242225242121232923222224201719271016161615151414121210161213131714141212111011
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.911.314.08.810.210.513.99.58.29.910.08.27.98.912.49.28.99.712.29.98.19.013.05.69.28.68.87.57.87.27.36.76.65.48.45.96.76.58.26.97.27.06.76.35.96.1

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value88807980747470727967636577726675766363636663655254514952595761636462616362648156554748494553
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.328.028.528.729.228.429.728.229.326.325.725.128.627.528.329.430.027.031.830.130.829.631.428.430.127.327.025.929.128.131.534.133.032.231.031.631.431.937.626.726.726.126.427.224.827.7

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value15242122202720177.2402520-27.3252213171826212125241818232523-11.229293020272114419.5201614211519
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.58.88.58.68.510.87.66.72.915.79.58.0-11.610.08.75.98.68.912.09.810.313.913.510.010.111.312.311.3-5.716.015.015.810.313.710.67.218.94.59.89.28.011.68.710.3

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.528152826271829262218353528133531202.127342923312822182631321.141424230433423479.0302623312429
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.79.75.510.110.210.67.911.59.88.57.413.412.910.95.813.712.58.91.113.215.813.711.017.015.512.210.212.815.315.80.622.521.721.715.521.317.211.821.84.314.914.712.717.113.315.3

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.57.42.94.85.45.32.43.25.24.40.3-5.68.77.3439.59.97.1-12.5109.18.13.75.96.55.51.92.36.59.8131313121216139.77.70.911109.7109.110
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.92.61.01.72.12.01.01.21.91.70.1-2.23.22.818.33.73.93.0-6.35.14.23.81.83.23.62.91.01.13.24.86.67.47.06.46.18.36.84.83.50.45.66.05.35.95.05.3

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-12-31
Value122.03.82.95.82.33.73.5103.32.66.1113.47.37.6139.87.56.4161.3130.3-3.0-1.0-30446.44.3-58454.8
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.20.71.41.02.30.91.61.43.81.31.02.34.11.33.12.95.24.23.83.17.70.66.20.2-1.6-0.5-16756.42.1-29748.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value132.97.77.88.16.96.56.7157.88.17.36.66.26.97.46.85.84.03.94.14.64.41.71.91.71.81.82.11.50.90.60.70.70.70.90.90.90.81.10.70.00.40.40.60.4
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.51.02.82.83.22.62.72.65.63.03.32.82.42.42.92.92.72.52.01.91.92.12.10.91.00.91.00.91.00.70.50.30.40.40.40.40.50.40.40.50.30.00.20.20.30.2

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value181.4133.8112.3112.1123.53.47.17.26.37.5
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.80.54.81.44.60.94.80.84.41.41.42.72.72.43.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.82115242122202720177.2412520-27.3252213171826212125231818232523-9.729263016272114479.0191613181418
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.57.55.58.88.58.68.510.87.66.72.915.89.57.8-11.610.08.75.98.68.912.09.810.314.012.910.010.211.312.311.3-4.915.713.515.58.413.710.67.221.84.39.69.07.510.08.19.6

us-gaap:NetIncomeLoss us-gaap:RestructuringCostAndReserve

us-gaap:FacilityClosing


Net
Period End2020-09-30
Value-0.9
Percentage of NetIncomeLoss-3.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FacilityClosing0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.82115242122202720177.2412520-27.3252213171826212125231818232523-9.729263016272114479.0191613181418
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.57.55.58.88.58.68.510.87.66.72.915.89.57.8-11.610.08.75.98.68.912.09.810.314.012.910.010.211.312.311.3-4.915.713.515.58.413.710.67.221.84.39.69.07.510.08.19.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.72115242122202720177.2402520-27.2252213161825212125231818222423-9.528262916272014479.01919131714
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.47.45.48.78.38.58.410.87.56.72.915.69.57.8-11.59.98.75.88.58.911.99.810.314.012.79.910.111.212.111.2-4.815.513.415.38.213.610.47.121.54.39.511.07.49.78.1

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302020-06-30
Value1.721
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.48.3

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.3-2.6-0.3-1.0-0.30.60.61.7-2.7-0.6-0.411-0.5-0.30.54.1-0.8-0.1-0.10.71.02.32.71.36.12.13.02.72.80.82.70.51.21.31.50.3-0.50.3-1.6-1.1-0.10.20.70.8-0.2-1.1
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.9-0.1-0.4-0.10.20.30.7-1.0-0.2-0.24.3-0.2-0.10.21.6-0.3-0.0-0.10.30.51.11.30.73.41.11.71.31.40.41.40.30.60.70.80.1-0.30.1-0.7-0.5-0.00.10.40.4-0.1-0.6

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1533233734342434443026314235203839266.23037312431242217253033-0.7414241294335245011312622302531
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.211.68.313.213.513.010.413.516.411.810.811.915.613.48.514.915.511.43.114.717.314.711.817.213.212.09.512.315.016.2-0.422.621.421.415.121.617.912.122.95.315.314.612.516.913.716.1

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-27.2-17.7-19.7-9.7-10.4-13.0-15.6-12.0-8.7-13.2-10.3-8.3-8.2-9.5-13.6-9.2-7.9-9.2-14.6-9.9-7.3-9.1-15.0-4.0-8.3-7.9
Percentage of OperatingIncomeLoss-171.1-52.8-84.5-26.2-30.2-38.1-62.9-34.7-19.7-43.4-38.4-26.7-19.5-27.1-67.7-23.9-20.0-34.6-235.5-32.1-19.5-28.8-60.7-12.6-34.6-35.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.2-6.1-7.1-3.5-4.1-5.0-6.5-4.7-3.2-5.1-4.1-3.2-3.0-3.6-5.8-3.6-3.1-3.9-7.3-4.7-3.4-4.2-7.1-2.2-4.6-4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, swm:AdvancedMaterialsStructuresSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1821191813139.719201410.01117107.615168.9-13.88.78.95.23.94.85.42.6
Percentage of OperatingIncomeLoss118.963.683.750.038.140.239.155.846.249.037.338.340.430.337.840.042.033.5-222.628.223.716.515.815.122.511.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.07.47.06.65.25.24.17.57.65.84.04.66.34.03.26.06.53.8-6.94.24.12.41.92.63.01.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments swm:AdvancedMaterialsStructuresSegment7.513.10.013.39.911.10.015.316.112.40.09.913.79.20.013.314.18.90.012.012.47.30.011.413.36.4

us-gaap:OperatingSegments, swm:EngineeredPapersSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2429232831333027322827273333263230263432353535312627
Percentage of OperatingIncomeLoss152.289.3100.976.292.297.9123.878.973.594.4101.188.479.196.9129.983.978.0101.1558.1103.995.7112.3144.997.5112.1123.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.410.48.410.112.512.812.910.612.011.110.910.612.312.911.112.512.111.517.415.316.516.517.116.814.814.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments swm:EngineeredPapersSegment19.223.90.020.126.124.10.021.022.720.90.019.722.723.10.022.822.420.20.023.424.724.70.021.819.018.8

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.43.83.43.63.63.23.43.13.73.33.43.64.14.14.93.94.64.44.64.24.44.33.53.53.73.33.83.64.24.14.23.63.73.82.82.42.62.22.62.32.42.02.32.12.12.0
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.21.31.41.21.41.21.41.31.41.41.51.62.11.51.81.92.32.02.02.01.71.92.01.82.11.82.12.02.11.91.92.01.41.21.31.11.21.11.21.11.31.21.21.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value377288279279254261238256269258248260270261235257255233198209217214209184181188181204203204196185196194196202198202218211206180182182182192
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value252163148138132122103126126120107120124115991161171006572727157424040
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.756.653.349.752.247.043.649.246.946.743.346.445.944.042.145.146.142.932.834.633.133.127.222.822.321.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.756.653.349.752.247.043.649.246.946.743.346.445.944.042.145.146.142.932.834.633.133.127.222.822.321.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value125125130140121138134130143137140139146146136141137133133136145143152142141147
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.343.446.750.347.853.056.450.853.153.356.753.654.156.057.954.953.957.167.265.466.966.972.877.277.778.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.343.446.750.347.853.056.450.853.153.356.753.654.156.057.954.953.957.167.265.466.966.972.877.277.778.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

swm:MaterialConversionRevenues


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value151719151516171515161615133018212327
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.06.07.05.45.96.47.35.95.96.56.56.15.111.88.08.29.211.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.06.07.05.45.96.47.35.95.96.56.56.15.111.88.08.29.211.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:MaterialConversionRevenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherRevenues


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value3.33.51.92.13.12.53.12.52.42.51.82.01.81.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.20.70.81.21.01.11.00.90.90.70.80.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.20.70.81.21.01.11.00.90.90.70.80.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherRevenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:ProductRevenues


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value359267262237241238251238242254229234229204
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.192.793.993.292.493.193.092.593.094.087.591.090.187.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.192.793.993.292.493.193.092.593.094.087.591.090.187.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:ProductRevenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

swm:MaterialConversionRevenues, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.62.32.82.55.03.82.72.32.01.9-1.91.92.26.2-2.63.22.68.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.81.00.92.01.51.10.90.70.7-0.80.70.82.4-1.11.21.03.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.81.00.92.01.51.10.90.70.7-0.80.70.82.4-1.11.21.03.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:MaterialConversionRevenues swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:MaterialConversionRevenues, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value111516121012141213141813112421172119
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.15.26.04.54.04.96.25.05.15.87.35.34.39.49.16.98.28.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.15.26.04.54.04.96.25.05.15.87.35.34.39.49.16.98.28.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:MaterialConversionRevenues swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherRevenues, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2.32.40.60.72.11.12.01.11.01.20.70.60.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.80.20.30.80.40.70.40.40.40.30.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.80.20.30.80.40.70.40.40.40.30.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherRevenues swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherRevenues, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1.01.11.31.41.01.41.11.41.41.31.11.41.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.50.60.40.50.40.50.50.50.40.50.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.50.60.40.50.40.50.50.50.40.50.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherRevenues swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:ProductRevenues, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value24615813512711712212211711712010811211491
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.154.948.650.044.747.945.545.545.344.641.443.644.939.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.154.948.650.044.747.945.545.545.344.641.443.644.939.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:ProductRevenues swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:ProductRevenues, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value113109126109124116128121124133120122115113
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.937.845.343.247.745.247.547.047.749.446.147.445.148.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.937.845.343.247.745.247.547.047.749.446.147.445.148.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:ProductRevenues swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value25216314813813212210312612612010712012411599116117100
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.756.653.349.752.247.043.649.246.946.743.346.445.944.042.145.146.142.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.756.653.349.752.247.043.649.246.946.743.346.445.944.042.145.146.142.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value125125130140121138134130143137140139146146136141137133
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.343.446.750.347.853.056.450.853.153.356.753.654.156.057.954.953.957.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.343.446.750.347.853.056.450.853.153.356.753.654.156.057.954.953.957.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value192143135148127127113131138130119131134127101127125115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.049.748.353.350.248.647.551.451.250.747.950.649.948.842.949.449.149.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.049.748.353.350.248.647.551.451.250.747.950.649.948.842.949.449.149.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Americas


Revenue
Period End2021-06-302020-06-30
Value2016
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas100.0100.0

srt:AsiaPacific


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value52545451494943434837453839353737
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.818.919.418.619.618.918.416.817.814.618.314.714.813.716.114.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.818.919.418.619.618.918.416.817.814.618.314.714.813.716.114.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:LatinAmerica


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value111413121313131313121313141713
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.95.04.84.85.15.65.15.15.15.15.04.85.67.55.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.95.04.84.85.15.65.15.15.15.15.04.85.67.55.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:LatinAmerica100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:EuropeandtheformerCommonwealthofIndependentStates


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1036773495056545154585561707367666660
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.523.326.317.620.021.522.919.920.222.622.423.426.128.028.525.725.925.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.523.326.317.620.021.522.919.920.222.622.423.426.128.028.525.725.925.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:EuropeandtheformerCommonwealthofIndependentStates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherForeignCountries


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value9.2122.615141513171518151612101113129.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.44.20.95.75.55.95.76.75.77.16.46.34.43.95.05.15.04.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.44.20.95.75.55.95.76.75.77.16.46.34.43.95.05.15.04.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherForeignCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

country:US, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value15410510110388837287878372848478658078
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.836.736.137.134.931.930.534.232.432.329.232.531.429.827.631.330.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.836.736.137.134.931.930.534.232.432.329.232.531.429.827.631.330.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3837344538434044504746475049364647
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.213.012.216.215.216.816.917.218.918.418.718.118.519.015.318.218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.213.012.216.215.216.816.917.218.918.418.718.118.519.015.318.218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Americas, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302020-06-30
Value9.15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas swm:AdvancedMaterialsStructuresSegment100.0100.0

srt:Americas, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302020-06-30
Value1111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.94.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.94.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Americas swm:EngineeredPapersSegment100.0100.0

srt:AsiaPacific, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value28322621252019202017192022141516
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.511.29.47.810.17.98.18.17.66.77.97.88.15.66.56.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.511.29.47.810.17.98.18.17.66.77.97.88.15.66.56.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:AsiaPacific, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value23222730242824222720251717212221
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.27.710.010.79.411.010.48.710.27.910.36.96.68.19.68.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.27.710.010.79.411.010.48.710.27.910.36.96.68.19.68.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:AsiaPacific swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:LatinAmerica, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.42.91.62.52.32.31.81.52.02.22.12.53.21.62.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.00.61.00.91.00.70.60.80.90.80.91.20.70.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.00.61.00.91.00.70.60.80.90.80.91.20.70.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:LatinAmerica swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:LatinAmerica, swm:EngineeredPapersSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.811119.61111111211101110111611
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.14.04.33.84.24.64.44.64.34.24.23.94.46.84.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.14.04.33.84.24.64.44.64.34.24.23.94.46.84.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:LatinAmerica swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:EuropeandtheformerCommonwealthofIndependentStates, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5517149.011127.11213139.710.01015141312
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.86.25.33.24.44.83.04.75.05.13.93.84.06.05.95.25.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.86.25.33.24.44.83.04.75.05.13.93.84.06.05.95.25.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:EuropeandtheformerCommonwealthofIndependentStates swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:EuropeandtheformerCommonwealthofIndependentStates, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4849584039434739414546516057535253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.717.121.014.415.716.619.915.215.217.518.519.622.222.022.620.520.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.717.121.014.415.716.619.915.215.217.518.519.622.222.022.620.520.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:EuropeandtheformerCommonwealthofIndependentStates swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherForeignCountries, swm:AdvancedMaterialsStructuresSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.54.73.92.84.74.02.53.73.94.83.73.74.03.63.23.33.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.61.41.01.81.51.01.41.41.91.51.41.51.41.41.31.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.61.41.01.81.51.01.41.41.91.51.41.51.41.41.31.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherForeignCountries swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:OtherForeignCountries, swm:EngineeredPapersSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.77.4-1.3139.3111113111312128.06.58.69.89.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.22.6-0.54.73.74.44.65.34.35.24.94.83.02.53.63.83.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.22.6-0.54.73.74.44.65.34.35.24.94.83.02.53.63.83.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax swm:OtherForeignCountries swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value377288279279254261238256269258248260270261235257255233198209217214209184181188181204203204196185196194196202198202218211206180182182182192
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2423158715841590157816551471145014891485146614871485154715421532151114871173120412431330129011191114113411861228126312471224940919905886872842860845838906883850
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-312013-12-31
Value151147206178182155151143166134187193909913425364
Percentage of Assets9.59.412.512.112.610.510.29.811.29.112.112.55.98.510.421.35.2
Percentage of Assets9.59.412.512.112.610.510.29.811.29.112.112.55.98.510.421.35.2
Percentage of Assets us-gaap:MaterialReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, swm:AdvancedMaterialsStructuresSegment


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-312013-12-31
Value955961973781765814807527511540543811918569648320286
Percentage of Assets60.160.958.853.152.854.754.336.034.436.435.152.659.948.550.327.023.4
Percentage of Assets60.160.958.853.152.854.754.336.034.436.435.152.659.948.550.327.023.4
Percentage of Assets us-gaap:OperatingSegments swm:AdvancedMaterialsStructuresSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, swm:EngineeredPapersSegment


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-312013-12-31
Value484469475512502518527796808810816537523505507611873
Percentage of Assets30.429.728.734.834.734.835.554.354.454.552.734.934.143.039.351.671.4
Percentage of Assets30.429.728.734.834.734.835.554.354.454.552.734.934.143.039.351.671.4
Percentage of Assets us-gaap:OperatingSegments swm:EngineeredPapersSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value17709349359629701063874875916923908918942985995962966969665679727827822659650699697707718721663373389382374386390378369397416365326
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets73.158.959.060.561.564.259.460.461.662.262.061.863.563.764.662.964.065.256.756.458.562.263.758.958.461.758.857.656.957.854.139.742.442.242.344.346.344.043.747.445.941.438.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2423158715841590157816551471145014891485146614871485154715421532151114871173120412431330129011191114113411861228126312471224940919905886872842860845838906883850
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value653652649628607592597574572562557568542562546569544517508525516502467460464434489520545526561567529522511485452482475441489517524517487489482277
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.941.141.039.538.535.840.639.638.437.838.038.236.536.335.437.136.034.843.343.641.537.836.341.141.638.341.242.443.142.245.960.357.657.857.755.753.756.056.352.654.158.661.60.00.00.00.00.0

us-gaap:StockholdersEquity dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

country:CN, us-gaap:CorporateJointVenture


Stockholders
Period End2020-12-312019-12-31
Value148135
Percentage of StockholdersEquity22.922.7
Percentage of Assets9.49.2
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-18.0-18.8-20.5-22.2-23.0-23.8-24.3-26.6-26.7-27.7-28.2-24.9
Percentage of StockholdersEquity-2.8-2.9-3.2-3.5-3.8-4.0-4.1-4.6-4.7-4.9-5.1-4.6
Percentage of Assets-0.7-1.2-1.3-1.4-1.5-1.4-1.7-1.8-1.8-1.9-1.9-1.6
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-9.5-8.7-13.1-15.5-16.3-16.2-3.5-5.0-2.0-1.1-0.6
Percentage of StockholdersEquity-1.5-1.3-2.0-2.5-2.7-2.7-0.6-0.9-0.3-0.2-0.1
Percentage of Assets-0.4-0.5-0.8-1.0-1.0-1.0-0.2-0.3-0.1-0.1-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value-106.3-115.7-111.9-128.2-137.0-138.3-122.6-135.1-121.7-123.8-124.5-114.2-111.6-78.6-89.4-105.0-114.4-131.0-139.3-116.1-117.6-116.0-141.4-138.2-119.7-135.9-76.5-36.11.5-1.6-5.0-18.9-35.6-24.4-15.4-23.3-36.7-10.7-24.5-10.529171.58.4-20.7-5.36.7-30.6
Percentage of StockholdersEquity-16.3-17.7-17.2-20.4-22.6-23.4-20.5-23.5-21.3-22.0-22.3-20.1-20.6-14.0-16.4-18.5-21.0-25.3-27.4-22.1-22.8-23.1-30.2-30.0-25.8-31.3-15.6-6.90.3-0.3-0.9-3.3-6.7-4.7-3.0-4.8-8.1-2.2-5.1-2.46.13.30.31.6-4.2-1.11.4-11.0
Percentage of Assets-4.4-7.3-7.1-8.1-8.7-8.4-8.3-9.3-8.2-8.3-8.5-7.7-7.5-5.1-5.8-6.9-7.6-8.8-11.9-9.6-9.5-8.7-11.0-12.3-10.7-12.0-6.4-2.90.1-0.1-0.4-2.0-3.9-2.7-1.7-2.7-4.4-1.2-2.9-1.33.32.00.20.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-78.8-88.2-78.3-90.5-97.7-98.3-94.8-103.5-93.0-95.0-95.7-64.9
Percentage of StockholdersEquity-12.1-13.5-12.1-14.4-16.1-16.6-15.9-18.0-16.2-16.9-17.2-11.9
Percentage of Assets-3.3-5.6-4.9-5.7-6.2-5.9-6.4-7.1-6.2-6.4-6.5-4.2
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value97949288878178757372717068676663616059575654535251504948464543414039413421121021120820620520820520220120564
Percentage of StockholdersEquity14.914.514.214.114.413.713.213.112.912.812.712.312.712.112.111.211.311.711.610.910.910.911.511.311.211.610.29.38.68.67.77.47.77.68.07.146.843.644.547.242.239.839.839.841.641.142.723.3
Percentage of Assets4.06.05.85.65.54.95.45.24.94.84.84.74.64.44.34.24.14.15.04.74.54.14.24.74.74.54.23.93.73.63.54.54.44.44.64.025.124.425.024.822.823.324.60.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.91.91.91.91.91.6
Percentage of StockholdersEquity0.50.50.50.50.50.50.50.50.50.60.60.50.60.60.60.50.60.60.60.60.60.60.60.70.60.70.60.60.60.60.60.50.60.60.60.60.40.40.40.40.40.40.40.40.40.40.40.6
Percentage of Assets0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.20.20.30.30.30.30.20.20.20.30.30.30.30.30.40.20.20.20.20.20.20.20.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value658670666664654646638631617610608609582569566607594585585581574560552543528517512505493479520540521504483471449431418373367349336325309297281255
Percentage of StockholdersEquity100.9102.8102.6105.8107.7109.2106.8109.9107.9108.7109.0107.2107.3101.4103.7106.7109.1113.0115.1110.6111.3111.6118.1118.1114.0118.9104.897.190.691.292.695.498.596.494.597.199.589.488.084.774.967.664.262.963.560.858.592.2
Percentage of Assets27.242.342.041.841.439.043.443.641.541.141.541.039.236.836.739.639.339.349.948.246.242.242.848.547.445.643.241.239.138.542.557.556.755.754.554.153.450.149.644.640.539.639.60.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value578428396422404473427418441430429421406435433433419403364363405477444510494506519562575560537456446423382362336340327314326325312
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.927.025.026.625.628.629.028.929.729.029.328.427.428.128.128.327.827.131.030.132.635.934.545.644.344.743.845.845.544.943.948.548.546.743.141.640.039.538.737.536.036.836.8

us-gaap:AssetsCurrent dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

country:CN, us-gaap:CorporateJointVenture


Assets
Period End2020-12-312019-12-31
Value11099
Percentage of AssetsCurrent27.723.3
Percentage of Assets6.96.8
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value656354666312610384878393907396106100979910789143200186268257267290286291277272222212181151117888576616277878091695611
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.74.03.54.24.07.77.05.95.95.66.46.15.06.26.96.66.56.79.27.411.615.114.524.023.123.624.523.323.122.322.223.723.120.017.113.510.59.99.17.36.98.710.30.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value656354666312610384878393907396106107
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.74.03.54.24.07.77.05.95.95.66.46.15.06.26.99.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value22917214816615117014315616616415416115916414916315314111513712613711911910611493130124126107100961019510610611011211711310198
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.510.99.410.59.610.39.710.811.211.110.510.810.710.69.710.710.19.59.811.410.210.39.310.69.610.17.910.69.810.28.810.710.511.210.812.212.712.813.314.112.511.511.6

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value247173179172172159161149154154151150153152155143141136119110108111112102106100108112130131132111112112111119120122113111125124113
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.210.911.310.910.99.611.010.310.410.410.310.110.39.910.19.49.49.210.29.28.78.38.79.19.58.89.19.110.310.510.811.812.212.412.613.714.314.213.513.313.914.113.4

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value17147.37.28.9117.45.56.97.85.15.37.28.15.46.98.08.25.15.66.06.24.65.66.59.16.15.85.76.24.78.110.016103.84.14.53.311131211
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.90.50.50.60.70.50.40.50.50.30.40.50.50.40.50.50.60.40.50.50.50.40.50.60.80.50.50.50.50.40.91.11.91.20.40.50.50.41.41.51.51.4

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value351342348369311310365400
Percentage of NoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.223.323.823.926.624.130.832.7

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:BR


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1519202423202735434958
Percentage of NoncurrentAssets4.35.76.06.67.66.57.68.80.00.00.0
Percentage of Assets1.01.31.41.62.01.62.32.94.95.96.8
Percentage of Assets country:BR0.00.00.00.00.00.00.00.00.00.00.0

country:FR


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value169158167181162163187210204208224
Percentage of NoncurrentAssets48.146.448.049.152.252.651.252.50.00.00.0
Percentage of Assets10.710.811.411.813.912.715.817.223.124.726.4
Percentage of Assets country:FR0.00.00.00.00.00.00.00.00.00.00.0

country:PL


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1214162120232932272418
Percentage of NoncurrentAssets3.74.34.85.96.47.67.98.20.00.00.0
Percentage of Assets0.81.01.11.41.71.82.42.73.12.92.2
Percentage of Assets country:PL0.00.00.00.00.00.00.00.00.00.00.0

country:US


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value12211811511589877586547284
Percentage of NoncurrentAssets34.734.633.231.128.728.220.621.70.00.00.0
Percentage of Assets7.78.17.97.57.66.86.47.16.18.510.0
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.0

swm:OtherForeignCountries


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value323027261515153.60.0
Percentage of NoncurrentAssets9.29.07.97.35.15.14.20.90.0
Percentage of Assets2.02.11.91.71.31.21.30.30.0
Percentage of Assets swm:OtherForeignCountries0.00.00.00.00.00.00.00.00.0

Assets Noncurrent

us-gaap:AssetsNoncurrent dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AssetsNoncurrent

country:CN, us-gaap:CorporateJointVenture


Assets
Period End2020-12-312019-12-31
Value166168
Percentage of AssetsNoncurrent100.0100.0
Percentage of Assets10.511.4
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value106.56.56.86.45.35.05.15.15.15.15.25.25.25.25.25.55.03.13.03.13.12.41.11.01.10.80.80.70.80.40.00.10.10.30.30.20.30.50.30.40.40.50.40.4
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value476324339327325324330320333333340343346363361359354342307308307312308313318325362369389391393384374381401402396420428439474464440
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.720.421.420.620.619.622.422.122.422.423.223.123.323.523.523.523.423.126.225.624.723.523.928.028.628.730.530.130.831.432.140.940.842.145.346.247.148.850.752.552.452.651.8

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value6664014034003973963373353383383383383393433413403383372292322322332331241251241251201211211185.95.75.55.75.65.45.85.65.96.35.89.0
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.525.325.525.225.224.022.923.222.722.823.122.822.922.222.122.222.422.719.619.318.717.618.111.111.211.010.69.89.69.79.70.60.60.60.60.60.60.70.70.70.70.70.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

swm:Scapa


Goodwillus-gaap:
Period End2021-04-15
Value263
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets swm:Scapa0.0

swm:TekraLLCAndTrientLLC


Goodwillus-gaap:
Period End2020-09-302020-06-302020-03-312020-03-13
Value61616060
Percentage of Goodwill15.315.415.20.0
Percentage of Assets3.83.93.60.0
Percentage of Assets swm:TekraLLCAndTrientLLC0.00.00.00.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value661396398395393391332331333333333333334337336335333332224227227228228120115
Percentage of Goodwill99.298.798.798.798.898.898.598.698.598.698.598.598.598.598.598.598.698.698.097.997.997.997.996.397.0
Percentage of Assets27.325.025.124.824.923.722.622.822.422.422.722.422.521.821.821.922.122.319.218.918.317.217.710.29.4
Percentage of Assets swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

swm:EngineeredPapersSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value5.15.15.35.14.94.84.94.85.04.95.05.05.15.35.25.14.94.64.74.94.84.94.85.36.0
Percentage of Goodwill0.81.31.31.31.21.21.51.41.51.41.51.51.51.51.51.51.41.42.02.12.12.12.14.25.1
Percentage of Assets0.20.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.40.40.40.40.40.40.5
Percentage of Assets swm:EngineeredPapersSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:TradeNames, swm:AdvancedMaterialsStructuresSegment


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value202020201919191920192020202020202020133535353521
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.81.31.31.31.31.21.41.41.31.31.41.41.41.31.31.31.31.41.13.02.92.72.81.8
Percentage of Assets us-gaap:TradeNames swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value54130431431732132925125426226627227928429429730130330717720320621021385878789787980800.4
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.419.219.920.020.419.917.117.517.617.918.618.819.219.019.319.720.120.615.116.916.615.816.67.67.87.77.56.46.36.46.60.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:CustomerRelationships, swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value44024625425625926720620921622022523023524324524925125314915215515816150
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.215.516.016.116.516.214.114.514.514.815.415.515.815.715.916.316.617.012.712.712.511.912.54.2
Percentage of Assets us-gaap:CustomerRelationships swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights, swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value622728282929222324242525262728282829111212131314
Percentage of FiniteLivedIntangibleAssetsNet14.211.011.111.211.211.111.011.011.111.211.211.211.411.411.411.511.511.68.08.08.28.38.429.4
Percentage of Assets2.61.71.81.81.91.81.51.61.61.71.71.71.81.81.81.91.92.01.01.01.01.01.11.2
Percentage of Assets us-gaap:DevelopedTechnologyRights swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncompeteAgreements, swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.50.50.50.60.60.70.70.70.91.01.21.31.51.71.81.92.12.31.21.31.41.51.60.0
Percentage of FiniteLivedIntangibleAssetsNet0.10.20.20.20.20.30.30.30.40.50.50.60.60.70.70.80.80.90.80.90.90.91.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.20.10.10.10.10.10.0
Percentage of Assets us-gaap:NoncompeteAgreements swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Patents, swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.90.91.01.01.01.01.11.11.11.11.11.21.21.21.21.31.31.31.31.31.41.41.41.5
Percentage of FiniteLivedIntangibleAssetsNet0.20.40.40.40.40.40.50.50.50.50.50.50.50.50.50.50.50.50.90.90.90.90.93.0
Percentage of Assets0.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:Patents swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames, swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1710101010110.00.00.00.00.00.00.00.00.00.00.00.40.8
Percentage of FiniteLivedIntangibleAssetsNet4.04.14.14.04.14.20.00.00.00.00.00.00.00.00.00.00.00.20.5
Percentage of Assets0.70.60.60.60.70.70.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets us-gaap:TradeNames swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value521284294297301310231234242246252258264273276280283287164
Percentage of FiniteLivedIntangibleAssetsNet118.5115.6115.7115.8115.9115.9111.8111.9112.0112.1112.3112.3112.5112.6112.7112.8112.9113.2110.2
Percentage of Assets21.517.918.618.719.118.715.716.216.316.617.217.417.817.717.918.318.719.314.0
Percentage of Assets swm:AdvancedMaterialsStructuresSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value1920222324
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0
Percentage of Assets1.21.41.51.61.6

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value95686965727469696264333940393930292827272524221921212230322931252524252829333134635655
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.04.34.44.14.64.54.74.84.24.32.32.72.72.52.62.01.91.92.32.22.11.91.71.71.91.91.92.52.52.42.62.72.82.82.93.33.53.93.84.17.06.46.5

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value113666066536766646072655860615956586650474245493937424446504847354743454849545357565966
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.74.23.84.23.44.14.54.44.14.94.53.94.14.03.93.73.94.54.33.93.43.43.83.63.33.83.83.84.03.93.83.85.24.85.15.55.96.46.46.86.36.77.8

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-31
Value5.84.92.72.93.43.02.81.11.41.41.61.12.55.34.01.90.54.45.39.43.3115.31.22.70.00.00.00.07.01.35.20.0
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.00.0
Percentage of Assets0.20.30.20.20.20.20.20.10.10.10.10.10.20.30.30.10.00.30.50.80.30.90.40.10.20.00.00.00.00.80.10.60.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value10683100867769867777637273696878797170777066768577767875808186928174757575737882879094105
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.45.36.45.54.94.25.95.35.24.25.04.94.74.45.15.24.74.76.65.95.45.76.66.96.96.96.46.66.46.97.68.78.18.38.58.68.79.19.710.410.010.712.4

Debt Current

us-gaap:DebtCurrent

us-gaap:DebtCurrent


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value182.72.82.72.61.91.91.91.93.13.33.23.03.85.13.54.32.93.03.23.73.53.33.13.23.22.98.94.28.24.24.63.34.64.27.43.23.35.05.08.79.28.7
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.20.20.20.20.10.10.10.10.20.20.20.20.20.30.20.30.20.30.30.30.30.30.30.30.30.20.70.30.70.30.50.40.50.50.80.40.40.60.61.01.01.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value244157166159136142157144142139143136136139147141134143135130116136143122119124123136135143143122125130126131125141140149156165186
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.19.910.510.08.78.610.710.09.59.49.89.29.29.09.59.28.99.711.610.89.410.311.110.910.711.010.411.110.711.511.813.013.714.414.315.014.916.516.717.817.318.822.0

us-gaap:LiabilitiesCurrent dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

country:CN, us-gaap:CorporateJointVenture


Liabilities
Period End2020-12-312019-12-31
Value6743
Percentage of LiabilitiesCurrent40.527.3
Percentage of Assets4.32.9
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2800000.02700000.02600000.01900000.01900000.01900000.01900000.03100000.03300000.03200000.03000000.03800000.05100000.03500000.04300000.02900000.03000000.03200000.03700000.03500000.03300000.03100000.03200000.03200000.02900000.08900000.04200000.08200000.04200000.04600000.03300000.04600000.04200000.07400000.03200000.03300000.05000000.0-5000000.0-8700000.0-8700000.0
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.10.10.10.10.20.20.20.20.20.30.20.30.20.30.30.30.30.30.30.30.30.20.70.30.70.30.50.40.50.50.80.40.40.6-0.6-1.0-1.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-31
Value5200000.04900000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.30.3

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5240293138474843262843
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.32.72.02.13.23.74.13.63.03.45.1

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:LiabilitiesNoncurrent

country:CN, us-gaap:CorporateJointVenture


Liabilities
Period End2020-12-312019-12-31
Value6088
Percentage of LiabilitiesNoncurrent100.0100.0
Percentage of Assets3.86.0
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value59763266975454256160662062264064267469069472172644745151859058040039844244044644944738515116416115616617414714616416651
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.739.842.445.636.938.740.741.842.443.143.343.644.745.347.748.838.137.541.744.445.035.735.739.037.136.435.535.931.516.117.917.917.619.120.717.117.319.718.36.1

us-gaap:LongTermDebt us-gaap:DebtInstrument

swm:TermLoanB


Long
Period End2021-03-31
Value0.0
Percentage of LongTermDebt0.0
Percentage of Assets0.0
Percentage of Assets swm:TermLoanB0.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

swm:TermLoanFacilityB, us-gaap:SecuredDebt


Long
Period End2021-06-30
Value350
Percentage of LongTermDebt0.0
Percentage of Assets14.4
Percentage of Assets swm:TermLoanFacilityB us-gaap:SecuredDebt0.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value61559063066675254055960461761863763967067969071672343744150657856839739443943743744443938114616115715115917014414115915710143
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.837.339.642.245.536.738.640.641.542.242.943.143.444.045.147.448.637.336.640.843.544.035.435.438.836.835.635.235.231.115.617.517.417.118.220.316.816.719.117.411.55.1

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-31
Value1262615590
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0
Percentage of Assets52.138.837.3

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1124545484645484647474852397482
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.62.82.83.12.92.73.33.23.23.23.33.43.35.87.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value43353633323131282828282828303035353333333336333836333427282828384040414143444240474746
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.82.22.32.12.01.92.11.91.91.91.91.91.91.92.02.32.32.22.82.72.72.72.63.43.22.92.92.22.32.32.34.14.44.44.74.75.15.25.04.85.35.45.4

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value91637872717374706866434758635955463929262628323432363125262728292925262626252525212021
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.05.04.64.54.45.14.94.64.42.93.24.04.13.93.63.12.62.52.22.12.22.53.12.93.22.62.12.12.22.33.13.22.83.03.03.12.93.03.02.32.42.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312019-12-31
Value1517
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0
Percentage of Assets1.01.2

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value5100000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value3500000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value2900000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value1800000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value5400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value2022232425
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets1.31.51.61.71.7

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value25
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets1.6

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value4200000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.3

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value653652649628607592597574572562557568542562546569544517508525516502467460464434489520545526561567529522511485452482475441489517524517487489482277
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.941.141.039.538.535.840.639.638.437.838.038.236.536.335.437.136.034.843.343.641.537.836.341.141.638.341.242.443.142.245.960.357.657.857.755.753.756.056.352.654.158.661.60.00.00.00.00.0

us-gaap:StockholdersEquity dei:EntityByLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

country:CN, us-gaap:CorporateJointVenture


Stockholders
Period End2020-12-312019-12-31
Value148135
Percentage of StockholdersEquity22.922.7
Percentage of Assets9.49.2
Percentage of Assets country:CN us-gaap:CorporateJointVenture0.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-18.0-18.8-20.5-22.2-23.0-23.8-24.3-26.6-26.7-27.7-28.2-24.9
Percentage of StockholdersEquity-2.8-2.9-3.2-3.5-3.8-4.0-4.1-4.6-4.7-4.9-5.1-4.6
Percentage of Assets-0.7-1.2-1.3-1.4-1.5-1.4-1.7-1.8-1.8-1.9-1.9-1.6
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-9.5-8.7-13.1-15.5-16.3-16.2-3.5-5.0-2.0-1.1-0.6
Percentage of StockholdersEquity-1.5-1.3-2.0-2.5-2.7-2.7-0.6-0.9-0.3-0.2-0.1
Percentage of Assets-0.4-0.5-0.8-1.0-1.0-1.0-0.2-0.3-0.1-0.1-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value-106.3-115.7-111.9-128.2-137.0-138.3-122.6-135.1-121.7-123.8-124.5-114.2-111.6-78.6-89.4-105.0-114.4-131.0-139.3-116.1-117.6-116.0-141.4-138.2-119.7-135.9-76.5-36.11.5-1.6-5.0-18.9-35.6-24.4-15.4-23.3-36.7-10.7-24.5-10.529171.58.4-20.7-5.36.7-30.6
Percentage of StockholdersEquity-16.3-17.7-17.2-20.4-22.6-23.4-20.5-23.5-21.3-22.0-22.3-20.1-20.6-14.0-16.4-18.5-21.0-25.3-27.4-22.1-22.8-23.1-30.2-30.0-25.8-31.3-15.6-6.90.3-0.3-0.9-3.3-6.7-4.7-3.0-4.8-8.1-2.2-5.1-2.46.13.30.31.6-4.2-1.11.4-11.0
Percentage of Assets-4.4-7.3-7.1-8.1-8.7-8.4-8.3-9.3-8.2-8.3-8.5-7.7-7.5-5.1-5.8-6.9-7.6-8.8-11.9-9.6-9.5-8.7-11.0-12.3-10.7-12.0-6.4-2.90.1-0.1-0.4-2.0-3.9-2.7-1.7-2.7-4.4-1.2-2.9-1.33.32.00.20.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-78.8-88.2-78.3-90.5-97.7-98.3-94.8-103.5-93.0-95.0-95.7-64.9
Percentage of StockholdersEquity-12.1-13.5-12.1-14.4-16.1-16.6-15.9-18.0-16.2-16.9-17.2-11.9
Percentage of Assets-3.3-5.6-4.9-5.7-6.2-5.9-6.4-7.1-6.2-6.4-6.5-4.2
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value97949288878178757372717068676663616059575654535251504948464543414039413421121021120820620520820520220120564
Percentage of StockholdersEquity14.914.514.214.114.413.713.213.112.912.812.712.312.712.112.111.211.311.711.610.910.910.911.511.311.211.610.29.38.68.67.77.47.77.68.07.146.843.644.547.242.239.839.839.841.641.142.723.3
Percentage of Assets4.06.05.85.65.54.95.45.24.94.84.84.74.64.44.34.24.14.15.04.74.54.14.24.74.74.54.23.93.73.63.54.54.44.44.64.025.124.425.024.822.823.324.60.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.91.91.91.91.91.6
Percentage of StockholdersEquity0.50.50.50.50.50.50.50.50.50.60.60.50.60.60.60.50.60.60.60.60.60.60.60.70.60.70.60.60.60.60.60.50.60.60.60.60.40.40.40.40.40.40.40.40.40.40.40.6
Percentage of Assets0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.20.20.30.30.30.30.20.20.20.30.30.30.30.30.40.20.20.20.20.20.20.20.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value658670666664654646638631617610608609582569566607594585585581574560552543528517512505493479520540521504483471449431418373367349336325309297281255
Percentage of StockholdersEquity100.9102.8102.6105.8107.7109.2106.8109.9107.9108.7109.0107.2107.3101.4103.7106.7109.1113.0115.1110.6111.3111.6118.1118.1114.0118.9104.897.190.691.292.695.498.596.494.597.199.589.488.084.774.967.664.262.963.560.858.592.2
Percentage of Assets27.242.342.041.841.439.043.443.641.541.141.541.039.236.836.739.639.339.349.948.246.242.242.848.547.445.643.241.239.138.542.557.556.755.754.554.153.450.149.644.640.539.639.60.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.03.03.03.03.03.03.03.03.03.03.13.13.13.13.13.11.91.91.91.91.91.91.9
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.20.20.30.30.30.30.20.20.20.30.30.30.30.30.40.20.20.20.20.20.20.2

us-gaap:CommonStockValue us-gaap:DebtInstrument, us-gaap:SubsequentEventType

swm:Scapa, us-gaap:SubsequentEvent


Common
Period End2021-04-152021-01-27
Value412402
Percentage of CommonStockValue0.00.0
Percentage of Assets0.00.0
Percentage of Assets swm:Scapa us-gaap:SubsequentEvent0.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value979492888781787573727170686766636160595756545352515049484645434140394134211210211208206205208
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.06.05.85.65.54.95.45.24.94.84.84.74.64.44.34.24.14.15.04.74.54.14.24.74.74.54.23.93.73.63.54.54.44.44.64.025.124.425.024.822.823.324.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value658670666664654646638631617610608609582569566607594585585581574560552543528517512505493479520540521504483471449431418373367349336
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.242.342.041.841.439.043.443.641.541.141.541.039.236.836.739.639.339.349.948.246.242.242.848.547.445.643.241.239.138.542.557.556.755.754.554.153.450.149.644.640.539.639.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value-106.3-115.7-111.9-128.2-137.0-138.3-122.6-135.1-121.7-123.8-124.5-114.2-111.6-78.6-89.4-105.0-114.4-131.0-139.3-116.1-117.6-116.0-141.4-138.2-119.7-135.9-76.5-36.11.5-1.6-5.0-18.9-35.6-24.4-15.4-23.3-36.7-10.7-24.5-10.529171.5
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.4-7.3-7.1-8.1-8.7-8.4-8.3-9.3-8.2-8.3-8.5-7.7-7.5-5.1-5.8-6.9-7.6-8.8-11.9-9.6-9.5-8.7-11.0-12.3-10.7-12.0-6.4-2.90.1-0.1-0.4-2.0-3.9-2.7-1.7-2.7-4.4-1.2-2.9-1.33.32.00.2

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2500000.02100000.03100000.01400000.02000000.02100000.03700000.01500000.01500000.0900000.01100000.01100000.01000000.01400000.02600000.02100000.0900000.01300000.02000000.0900000.01300000.01300000.01600000.0200000.0500000.01000000.01500000.01300000.01900000.01100000.01200000.01200000.0700000.0100000.02400000.01400000.01500000.01600000.0800000.01000000.01100000.0900000.02100000.02100000.01400000.02100000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2500000.02100000.03100000.01400000.02000000.02100000.03700000.01500000.01500000.0900000.01100000.01100000.01000000.01400000.02600000.02100000.0900000.01300000.02000000.0900000.01300000.01300000.01600000.0200000.0500000.01000000.01500000.01300000.01900000.01100000.01200000.01200000.0700000.0100000.02400000.01400000.01500000.01600000.0800000.01000000.01100000.0900000.02100000.02100000.01400000.02100000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.1125458445.14163421345373422374831134630341764244411743439185541404152502348432512-0.235304331
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.94.419.420.817.42.017.424.915.65.018.514.312.68.416.018.812.55.623.514.715.98.230.713.324.56.040.816.819.28.928.022.320.621.226.524.812.023.920.012.26.0-0.119.616.823.716.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-641700000.0-7300000.0-12600000.0-6700000.0-7500000.0-176300000.08000000.0-5600000.0-9600000.0-7600000.0-9200000.0-3300000.0-7800000.0-7200000.0-9300000.01600000.0-4900000.0-305900000.0-7400000.0-6300000.0-3200000.0-5500000.0-301500000.0-4600000.0-3700000.0-3900000.0-40200000.0-6300000.0-16400000.0-11600000.0-233600000.0-10200000.0-1300000.0-8600000.0-8700000.0-3700000.0-22800000.0-16500000.0-16400000.0-8700000.0-20500000.0-26500000.0-27600000.0-23700000.0-20400000.0-9500000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-169.9-2.5-4.5-2.4-3.0-67.43.4-2.2-3.6-2.9-3.7-1.3-2.9-2.7-3.90.6-1.9-131.1-3.7-3.0-1.5-2.6-143.7-2.5-2.0-2.1-22.1-3.1-8.1-5.7-118.9-5.5-0.7-4.4-4.4-1.8-11.5-8.2-7.5-4.1-9.9-14.7-15.1-13.0-11.2-4.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6364.5-54.6-50.6-100.3196-33.1-59.2-28.2-15.3-32.8-16.8-44.5-26.8-24.3-48.6-31.7284-16.7-79.0-84.4-5.6161-9.7-58.2-1.6-17.6-11.5-9.6-0.4222-24.6-7.5-2.8-12.2-17.62.5-23.3-11.6-16.2-7.116-1.7-19.2-0.4-9.5
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax168.41.6-19.5-18.1-39.575.3-13.9-23.1-10.4-5.9-13.2-6.5-16.5-10.2-10.3-18.9-12.4121.8-8.4-37.7-38.8-2.677.2-5.3-32.0-0.9-9.7-5.6-4.7-0.2113.1-13.3-3.8-1.4-6.2-8.71.3-11.5-5.3-7.7-3.49.2-0.9-10.5-0.2-4.9

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.29.0-11.62.4-62.82318-2.94.4-10.43.316-22.2-10.8
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.63.1-4.20.9-24.79.17.6-1.11.6-4.01.36.4-8.2-4.1

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:IncomeStatementLocation

us-gaap:AmortizationOfFinancingCosts

us-gaap:InterestExpense


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1300000.0300000.0300000.0400000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0500000.0400000.0500000.0400000.0500000.0500000.0400000.0400000.0400000.0900000.0400000.0500000.0100000.0200000.0100000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value28161919171514141414141515151214151611111110129.59.89.710111013108.99.68.59.69.89.81010111010109.79.910.0
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value11-12.412-14.21.3-4.44.5-9.77.56.3-2.82.42.13.5-1.94.0-0.9-1.24.3-2.5-4.34.53.6-5.94.3-0.5-0.21.52.35.2-7.4-1.11.8-3.5-2.2-2.10.0-1.32.42.7-8.3
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value12-1.85.2-3.112-10.89.4-0.8-1.44.01.7-2.27.1-1.77.8-0.91.7-2.211
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.1125458445.14163421345373422374831134630341764244411743439185541404152502348432512-0.235304331
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.94.419.420.817.42.017.424.915.65.018.514.312.68.416.018.812.55.623.514.715.98.230.713.324.56.040.816.819.28.928.022.320.621.226.524.812.023.920.012.26.0-0.119.616.823.716.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.82115242122202720177.2412520-27.3252213171826212125231818232523-9.729263016272114479.0191613181418
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.57.55.58.88.58.68.510.87.66.72.915.89.57.8-11.610.08.75.98.68.912.09.810.314.012.910.010.211.312.311.3-4.915.713.515.58.413.710.67.221.84.39.69.07.510.08.19.6

us-gaap:NetIncomeLoss us-gaap:RestructuringCostAndReserve

us-gaap:FacilityClosing


Net
Period End2020-09-30
Value-0.9
Percentage of NetIncomeLoss-3.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FacilityClosing0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.82115242122202720177.2412520-27.3252213171826212125231818232523-9.729263016272114479.0191613181418
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.57.55.58.88.58.68.510.87.66.72.915.89.57.8-11.610.08.75.98.68.912.09.810.314.012.910.010.211.312.311.3-4.915.713.515.58.413.710.67.221.84.39.69.07.510.08.19.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2500000.02100000.03200000.01400000.02000000.02200000.03700000.01500000.01600000.0900000.01100000.01200000.01000000.01500000.02600000.02300000.0800000.01400000.02100000.01000000.01300000.01400000.01700000.0200000.0600000.01000000.01600000.01300000.01900000.01100000.01200000.01200000.0700000.0100000.02400000.01400000.01500000.01600000.0800000.01000000.01100000.0900000.02100000.02100000.01400000.02100000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-641700000.0-7300000.0-12600000.0-6700000.0-7500000.0-176300000.08000000.0-5600000.0-9600000.0-7600000.0-9200000.0-3300000.0-7800000.0-7200000.0-9300000.01600000.0-4900000.0-305900000.0-7400000.0-6300000.0-3200000.0-5500000.0-301500000.0-4600000.0-3700000.0-3900000.0-40200000.0-6300000.0-16400000.0-11600000.0-233600000.0-10200000.0-1300000.0-8600000.0-8700000.0-3700000.0-22800000.0-16500000.0-16400000.0-8700000.0-20500000.0-26500000.0-27600000.0-23700000.0-20400000.0-9500000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-169.9-2.5-4.5-2.4-3.0-67.43.4-2.2-3.6-2.9-3.7-1.3-2.9-2.7-3.90.6-1.9-131.1-3.7-3.0-1.5-2.6-143.7-2.5-2.0-2.1-22.1-3.1-8.1-5.7-118.9-5.5-0.7-4.4-4.4-1.8-11.5-8.2-7.5-4.1-9.9-14.7-15.1-13.0-11.2-4.9

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.27.19.45.87.57.48.64.87.97.37.26.17.76.09.78.28.211107.85.24.5104.93.95.28.9117.08.18.9113.65.66.86.46.27.89.094-69.8272871-35.79.9
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6364.5-54.6-50.6-100.3196-33.1-59.2-28.2-15.3-32.8-16.8-44.5-26.8-24.3-48.6-31.7284-16.7-79.0-84.4-5.6161-9.7-58.2-1.6-17.6-11.5-9.6-0.4222-24.6-7.5-2.8-12.2-17.62.5-23.3-11.6-16.2-7.116-1.7-19.2-0.4-9.5
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax168.41.6-19.5-18.1-39.575.3-13.9-23.1-10.4-5.9-13.2-6.5-16.5-10.2-10.3-18.9-12.4121.8-8.4-37.7-38.8-2.677.2-5.3-32.0-0.9-9.7-5.6-4.7-0.2113.1-13.3-3.8-1.4-6.2-8.71.3-11.5-5.3-7.7-3.49.2-0.9-10.5-0.2-4.9

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value678250.00.70.0212190.00.10.0-1.96350.80.00.11521.32860.04.04.5274528.11215135.3931174022221103.20.1327.18.014148560.10.14.343
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.00.0100.00.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value170.64037860.43845140.617635319.7121878.20.73.87077192706.1583.11311875816838183.111131.95.125198-95.20.20.4111-108.152
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13131313131313131313131313131312250.0121212121211111111111011119.59.49.44.74.62.42.42.413-8.02.72.713-8.12.7
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.03.10.10.0-0.11.0-0.10.00.10.90.20.10.22.50.10.1-0.11.10.10.00.00.60.00.00.02.90.0-0.10.3520.00.00.01.70.04.324210.0225-150.3450.019-1.40.6
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value140.026.4017.00.2080.191-0.0070.1080.1970.2-0.014-0.160.2490.2560.3840.270.310.343-0.1410.3880.2650.276-0.0120.1880.230.24-0.0190.0880.2080.30.0990.3310.3240.293-0.0010.3870.3960.408-0.0790.10.3770.410.0140.3440.376
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value42444741264562
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value16124.710132920
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1661571721821943337
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.21.10.91.01.10.6
Percentage of DeferredTaxAssetsValuationAllowance0.70.70.50.50.61.8

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:StatementGeographical

country:ES


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value9.18.48.69.19.39.7
Percentage of DeferredTaxAssetsValuationAllowance5.55.35.05.04.828.7

country:LU


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value151143156166169
Percentage of DeferredTaxAssetsValuationAllowance91.191.190.991.186.8

country:PH


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.40.42.22.71513
Percentage of DeferredTaxAssetsValuationAllowance0.20.31.31.57.939.1

swm:AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment

swm:AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment


Adjustments
Period End2020-12-31
Value0
Percentage of AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment0.0

swm:AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-31
Value0
Percentage of AdjustmentsToAdditionalPaidInCapitalPlanModificationAdjustment0.0

swm:BusinessCombinationConsiderationTransferredTransactionCost us-gaap:BusinessAcquisition

swm:BusinessCombinationConsiderationTransferredTransactionCost

swm:Scapa


Business
Period End2021-04-15
Value8500000.0
Percentage of BusinessCombinationConsiderationTransferredTransactionCost100.0

swm:DebtInstrumentOptionToExtendAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

swm:DebtInstrumentOptionToExtendAmount

swm:TermLoanFacilityB, us-gaap:SecuredDebt


Debt
Period End2021-02-10
Value250
Percentage of DebtInstrumentOptionToExtendAmount100.0

swm:OperatingProfitPercentage

swm:OperatingProfitPercentage


Operating
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value100.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.0
Percentage of OperatingProfitPercentage100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

swm:OperatingProfitPercentage us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-171.1-52.8-9.7-26.2-0.302-0.381-0.06-0.347-0.197-0.434-0.029-0.267-0.195-0.272-0.069-0.239-0.2-0.346-0.122-0.321-0.194-0.288-0.084-0.126-0.346-0.352
Percentage of OperatingProfitPercentage0.0-52.80.00.0-30.2-38.10.0-34.7-19.7-43.40.0-26.7-19.5-27.20.0-23.9-20.0-34.60.0-32.1-19.4-28.80.0-12.6-34.6-35.2

swm:OperatingProfitPercentage us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, swm:AdvancedMaterialsStructuresSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value118.963.67.450.00.3810.402-0.020.5580.4620.490.0020.3830.4040.303-0.0020.40.420.335-0.1430.2820.2370.165-0.0010.1510.2250.116
Percentage of OperatingProfitPercentage0.063.60.00.038.140.20.055.846.249.00.038.340.430.30.040.042.033.50.028.223.716.50.015.122.511.6

us-gaap:OperatingSegments, swm:EngineeredPapersSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value152.289.22.376.20.9210.9790.080.7890.7350.9440.0270.8840.7910.9690.0710.8390.781.0110.2651.0390.9571.1230.0850.9751.1211.236
Percentage of OperatingProfitPercentage0.089.20.00.092.197.90.078.973.594.40.088.479.196.90.083.978.0101.10.0103.995.7112.30.097.5112.1123.6

swm:PensionAndOtherPostretirementBenefitExpenseNetOfPensionAndOtherPostretirementBenefitContributions

swm:PensionAndOtherPostretirementBenefitExpenseNetOfPensionAndOtherPostretirementBenefitContributions


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value800000.01100000.01100000.0800000.01000000.0800000.0500000.0800000.0600000.0700000.00800000.01000000.01000000.01300000.0500000.01000000.01000000.01100000.0900000.0900000.0900000.0800000.01100000.01000000.01300000.0-1700000.0800000.002100000.0-2300000.01000000.01600000.0800000.0-600000.0-700000.01000000.01300000.0-4100000.0-5000000.01200000.01400000.0500000.0400000.0500000.0700000.0
Percentage of PensionAndOtherPostretirementBenefitExpenseNetOfPensionAndOtherPostretirementBenefitContributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:SalesRevenueNetPercentage

swm:SalesRevenueNetPercentage


Sales
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value100.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.01.001.01.0
Percentage of SalesRevenueNetPercentage100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

swm:SalesRevenueNetPercentage us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, swm:AdvancedMaterialsStructuresSegment


Sales
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value66.756.61.049.70.5220.47-0.949.20.4690.46744.4460.4640.4590.44-0.0060.4510.4610.429-0.0020.3460.3310.3310.0140.2280.2230.215
Percentage of SalesRevenueNetPercentage0.056.60.00.052.247.00.04920.046.946.70.046.445.944.00.045.146.142.90.034.633.133.10.022.822.321.5

us-gaap:OperatingSegments, swm:EngineeredPapersSegment


Sales
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value33.343.4-1.050.30.4780.530.950.80.5310.53354.5540.5360.5410.560.0060.5490.5390.5710.0020.6540.6690.669-0.0140.7720.7770.785
Percentage of SalesRevenueNetPercentage0.043.40.00.047.853.00.05080.053.153.30.053.654.156.00.054.953.957.10.065.466.966.90.077.277.778.5

swm:TaxAmnestyTaxLiabilityReductionPercent dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType

swm:TaxAmnestyTaxLiabilityReductionPercent

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:SubsequentEvent


Tax
Period End2021-04-09
Value70.0
Percentage of TaxAmnestyTaxLiabilityReductionPercent100.0

swm:WriteDownValueSparePartsAndConsigmentInventory

swm:WriteDownValueSparePartsAndConsigmentInventory


Write
Period End2020-09-30
Value2000000.0
Percentage of WriteDownValueSparePartsAndConsigmentInventory100.0

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

swm:Scapa


Business
Period End2021-06-302020-06-30
Value7.814
Percentage of BusinessAcquisitionsProFormaNetIncomeLoss100.0100.0

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred

swm:Scapa


Business
Period End2021-04-15
Value75
Percentage of BusinessCombinationConsiderationTransferredLiabilitiesIncurred100.0

us-gaap:BusinessCombinationConsiderationTransferredOther1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredOther1

swm:Scapa


Business
Period End2021-04-15
Value568
Percentage of BusinessCombinationConsiderationTransferredOther1100.0

us-gaap:BusinessCombinationIntegrationRelatedCosts us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationIntegrationRelatedCosts

swm:Scapa


Business
Period End2021-06-30
Value5100000.0
Percentage of BusinessCombinationIntegrationRelatedCosts100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-12-312020-09-302020-06-302020-03-31
Value001100000.01100000.0
Percentage of BusinessCombinationIntegrationRelatedCosts0.00.00.00.0

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

swm:Scapa


Business
Period End2021-06-302020-06-30
Value3.69.2
Percentage of BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual100.0100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-12-312020-09-302020-06-302020-03-31
Value1.80.4-0.70.4
Percentage of BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual0.00.0-7.60.0

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual

swm:Scapa


Business
Period End2021-06-302020-06-30
Value387319
Percentage of BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual100.0100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-12-312020-09-302020-06-302020-03-31
Value2323255.5
Percentage of BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual0.00.07.80.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-31
Value-1800000.0-1800000.01800000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred100.0100.0100.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-31
Value-3400000.0-3400000.03400000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.24.91.70.60.02.93.0-0.82.01.74.5-1.30.81.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3000000.0-6700000.0-100000.0900000.0700000.0-1200000.0-1500000.0-200000.0-500000.04500000.0700000.01500000.0800000.0-800000.0700000.01700000.00-10200000.0-3500000.0100000.0100000.0
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302020-06-30
Value-200000.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-900000.0-900000.0-800000.0-900000.0-800000.0-800000.0-500000.0-500000.0-500000.0-500000.0-800000.0-700000.0-800000.0-900000.0-800000.0-600000.0-900000.0-900000.0-1000000.0-800000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses450.00.00.00.0800.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value-300000.0-300000.0-100000.0-300000.0-200000.0-200000.0-200000.0-200000.0-200000.0-200000.0-300000.0-300000.0-300000.0-300000.0-200000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

country:GB, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-30
Value900000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1000000.01000000.01200000.01200000.01300000.01200000.01400000.01500000.01400000.01500000.01400000.01500000.01400000.01500000.01600000.01600000.01600000.01600000.01700000.01700000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets111.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

country:GB, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-30
Value800000.0
Percentage of DefinedBenefitPlanInterestCost100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value700000.0700000.0900000.0900000.01000000.0900000.01100000.01200000.01100000.01200000.01100000.01000000.01100000.01100000.01200000.01200000.01200000.01200000.01300000.01300000.0
Percentage of DefinedBenefitPlanInterestCost87.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0100000.00100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0100000.0
Percentage of DefinedBenefitPlanInterestCost0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302020-06-30
Value700000.0500000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0

country:GB, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-30
Value-100000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-14.3

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value600000.0600000.0500000.0600000.0500000.0500000.0200000.0200000.0200000.0200000.0500000.0200000.0500000.0500000.0400000.0200000.0500000.0500000.0600000.0400000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost85.70.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value600000.0600000.0500000.0600000.0500000.0600000.0500000.0500000.0500000.0600000.0700000.0600000.0600000.0600000.0600000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302020-06-30
Value400000.0300000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value300000.0300000.0300000.0300000.0300000.0300000.0200000.0200000.0300000.0300000.0300000.0300000.0200000.0200000.0300000.0
Percentage of DefinedBenefitPlanServiceCost0.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings

us-gaap:CrossCurrencyInterestRateContract, us-gaap:NetInvestmentHedging


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000000.0-1100000.011400000.0-1400000.02000000.02000000.02300000.0-300000.0400000.0500000.0
Percentage of DerivativeExcludedComponentGainLossRecognizedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

swm:ForeignExchangeContractOne, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:Sales


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value-400000.0-600000.0-1000000.0-600000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0

swm:ForeignExchangeContractTwo, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:OtherNonoperatingIncomeExpense


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1200000.0700000.0400000.0600000.0
Percentage of DerivativeGainLossOnDerivativeNet300.0-116.7-40.0-100.0

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


Derivative
Period End2020-09-302019-09-30
Value100000.0-400000.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.0

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


Derivative
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-900000.0-1000000.0-600000.0-300000.0-400000.0-200000.0
Percentage of DerivativeGainLossOnDerivativeNet0.0100.0100.00.00.00.0

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

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated, us-gaap:OtherNonoperatingIncomeExpense


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value6300000.0-6600000.0-600000.0300000.0200000.0-100000.0100000.0
Percentage of DerivativeGainLossOnDerivativeNet-1575.01100.00.0-30.0-33.30.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1600000.0100000.0-800000.0-600000.001800000.01800000.0900000.0800000.0800000.0800000.0
Percentage of DerivativeGainLossOnDerivativeNet400.0-16.70.060.0-0.00.00.00.00.00.00.0

us-gaap:DistributedEarnings

us-gaap:DistributedEarnings


Distributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-30
Value200000.0100000.0200000.0100000.0200000.0300000.0200000.00100000.0100000.0100000.0100000.00100000.0100000.0100000.0100000.0100000.0100000.0100000.00100000.0000200000.00100000.0100000.0100000.00100000.00100000.0100000.00100000.00200000.00100000.0200000.0-100000.0
Percentage of DistributedEarnings100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0100.00.0100.0100.0100.00.0100.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value131313131313131313131313131313121212121212121211111111111011119.59.49.44.74.62.42.417-2.4-2.6-2.718-2.7-2.7-2.7
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value131313131313131313131313131313121212121212121211111111111011119.59.49.44.74.62.42.417-2.4-2.6-2.718-2.7-2.7-2.7
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value600000.0-900000.01500000.01500000.0800000.0-2000000.01800000.0-2000000.0200000.0-500000.0-600000.0-400000.0-4000000.01200000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-30
Value00003000000.0000003700000.0-3600000.0
Percentage of EquityMethodInvestmentDividendsOrDistributions0.00.00.00.0100.00.00.00.00.00.0100.0100.0

us-gaap:GainLossRelatedToLitigationSettlement dei:LegalEntity, us-gaap:LitigationCase

us-gaap:GainLossRelatedToLitigationSettlement

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment


Gain
Period End2021-04-09
Value6100000.0
Percentage of GainLossRelatedToLitigationSettlement100.0

us-gaap:GainLossRelatedToLitigationSettlement dei:LegalEntity, us-gaap:LitigationCase, us-gaap:IncomeStatementLocation

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:InterestExpense


Gain
Period End2021-04-09
Value4500000.0
Percentage of GainLossRelatedToLitigationSettlement73.8

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:OtherExpense


Gain
Period End2021-04-09
Value1600000.0
Percentage of GainLossRelatedToLitigationSettlement26.2

us-gaap:GainLossRelatedToLitigationSettlement dei:LegalEntity, us-gaap:LitigationCase, us-gaap:IncomeStatementLocation, us-gaap:SubsequentEventType

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:InterestExpense, us-gaap:SubsequentEvent


Gain
Period End2021-04-09
Value4600000.0
Percentage of GainLossRelatedToLitigationSettlement75.4

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:OtherExpense, us-gaap:SubsequentEvent


Gain
Period End2021-04-09
Value1600000.0
Percentage of GainLossRelatedToLitigationSettlement26.2

us-gaap:GainLossRelatedToLitigationSettlement dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:SubsequentEvent


Gain
Period End2021-04-09
Value6100000.0
Percentage of GainLossRelatedToLitigationSettlement100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value1800000.0-1900000.03400000.02400000.0600000.0-1300000.01600000.0-2200000.0-300000.0200000.0-600000.0-1200000.0-3300000.01900000.01200000.01600000.02300000.0500000.0-2600000.0-100000.0-1100000.0200000.0-700000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1800000.0-1700000.03200000.02200000.0500000.0-1200000.01500000.0-2000000.0-400000.0300000.0-600000.0-1100000.0-3100000.01800000.01100000.01400000.02000000.0600000.0-2400000.0-200000.0-1000000.0100000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.089.594.191.783.392.393.890.9133.3150.0100.091.793.994.791.787.587.0120.092.3200.090.950.0

swm:EngineeredPapersSegment


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value0-200000.0200000.0200000.0100000.0-100000.0100000.0-200000.0100000.0-100000.00-100000.0-200000.0100000.0100000.0200000.0300000.0-100000.0-200000.0100000.0-100000.0100000.0-100000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss0.010.55.98.316.77.76.29.1-33.3-50.0-0.08.36.15.38.312.513.0-20.07.7-100.09.150.014.3

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2800000.01000000.02900000.01100000.0900000.003700000.01300000.0-700000.0-200000.0-10800000.0300000.0-500000.0-300000.02100000.00300000.0100000.02400000.01800000.0700000.0-100000.02300000.0100000.02800000.01400000.01800000.0-700000.0300000.0600000.0700000.01700000.0600000.0800000.01800000.01300000.0400000.0500000.01300000.01400000.01100000.0900000.01100000.0800000.0700000.0600000.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-13.527-16.613-25.333-15.4-7.6-0.312-5.44.66.013-15.82.95.28.6-17.89.8-8.713-14.614-8.025-43.513-1.818-11.31.8-1.97.0-9.7-2.85.1-7.6-2.81911-2.5
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-12.62.45.71.5-1.52.10.20.6-5.21.4-6.5-0.2-4.53.2-0.21.5-5.4-3.0-9.97.7-8.16.55.6-1.6104.02.3-2.4-4.20.20.9-1.4-10.56.42.3-0.7-5.08.110-1.2-1.00.2
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-13.58.65.63.9-10.75.33.56.8-11.73.33.02.3-9.6-2.87.3-0.2-7.38.04.2-5.4-6.05.2-0.81.6-2.3-2.90.5-4.8-0.80.01.31.90.2-4.90.7-0.3-4.5-3.25.93.3-3.9
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncreaseDecreaseInOperatingCapital


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2030-13.3-11.2-3.533-7.3-18.55.622-7.00.61218-9.9-6.28.719-3.4-3.94.413-35.311-8.819-46.23.54.419-16.84.87.83.4-9.4-4.316-4.8-5.270-14.5-26.5-6.2-42.3155.2
Percentage of IncreaseDecreaseInOperatingCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:IncreaseDecreaseInPrepaidExpense


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-500000.04800000.00-1900000.0-2200000.03500000.0-200000.0-1500000.0-800000.02700000.0-200000.0-1800000.0-600000.02700000.0-1400000.0-1300000.0200000.01700000.0-500000.0-300000.0-100000.01400000.0-1100000.0-700000.0500000.0200000.0-100000.0-200000.0-600000.01500000.00-600000.0-400000.0900000.0-400000.0-400000.0-100000.01000000.0-500000.0-9700000.08300000.01400000.0
Percentage of IncreaseDecreaseInPrepaidExpense100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWriteDown

us-gaap:InventoryWriteDown


Inventory
Period End2020-12-312020-09-30
Value02000000.0
Percentage of InventoryWriteDown0.0100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

swm:NewCreditFacility


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.084.030.043.94080.00080.03844.375700.00010.04420.0050.00070.0344
Percentage of LineOfCreditFacilityInterestRateDuringPeriod100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualPayments dei:LegalEntity, us-gaap:LitigationCase

us-gaap:LossContingencyAccrualPayments

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment


Loss
Period End2021-04-09
Value2600000.0
Percentage of LossContingencyAccrualPayments100.0

us-gaap:LossContingencyAccrualPayments dei:LegalEntity, us-gaap:LitigationCase, us-gaap:SubsequentEventType

swm:SWMBBrazilianMill, swm:RawMaterialsAssessment, us-gaap:SubsequentEvent


Loss
Period End2021-04-09
Value2600000.0
Percentage of LossContingencyAccrualPayments100.0

us-gaap:LossContingencyLossInPeriod

us-gaap:LossContingencyLossInPeriod


Loss
Period End2021-03-312019-12-312019-09-302018-12-312018-09-30
Value-6.10.00.00.00.0
Percentage of LossContingencyLossInPeriod100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-0.10.10.20.0-0.40.10.00.0-3.30.08.6-0.3-4.30.00.0-9.80.00.06.71.70.00.0-10.72.32.81.1-7.82.32.22.2
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.0100.00.0100.0100.00.00.0100.00.0100.0100.0100.00.00.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value9.4-9.9127.20.6-3.58.9-10.22.20.9-3.8-2.8-30.68.6-1.111195.9-22.00.2-8.914-12.3-6.312-48.7-23.4-37.2-0.7-1.75.116-4.8-11.28.212-23.112-8.7-31.08.713
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value900000.01600000.01500000.0800000.01200000.0400000.01700000.0100000.01000000.0500000.01500000.0800000.0800000.0700000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.9-0.9167.70.5-19.010-12.41.7-2.7-7.9-2.5-33.312
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.21.12.11.11.10.71.60.70.8-0.6-4.11.01.11.1
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent15.2-122.212.714.3220.0-3.715.2-5.647.122.251.9-40.0-3.38.9

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.64.53.51.10.2-15.62.7-4.1-1.0-0.50.6-0.4-4.41.8
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent-32.9-500.021.214.340.082.125.733.1-58.818.5-7.616.013.214.5

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.3-6.5105.5-0.8-4.16.2-9.01.9-1.6-4.4-3.1-30.09.5
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent117.7722.266.171.4-160.021.659.072.6111.859.355.7124.090.176.6

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent

swm:ForeignExchangeContractOne, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.7-0.6-0.8-5.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent100.0100.0100.0100.0

swm:ForeignExchangeContractTwo, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1.00.90.90.5
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent-142.9-150.0-112.5-10.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:Nondesignated


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1.87.0-5.412
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent-257.1-1166.7675.0-240.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2.14.1-0.8-8.2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent-300.0-683.3100.0164.0

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

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


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.8-0.3-0.8-5.00.8-1.3-0.30.1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent0.00.0100.0100.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:CashFlowHedging, us-gaap:Nondesignated, us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2020-09-30
Value-10.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent0.0

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


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.10.2-0.8-8.23.10.10.80.6
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent0.00.0100.0164.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-4.211-10.1-6.1-0.7-1.20.90.40.4-2.22.5
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent-600.0-1900.00.0762.514.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2400000.04400000.01800000.00-700000.0-12700000.0900000.0-600000.0900000.0400000.01700000.0400000.0-2200000.02500000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1600000.0-600000.0-800000.0-600000.00-600000.02400000.01800000.0900000.01300000.0800000.0800000.0800000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:CrossCurrencyInterestRateContract, us-gaap:NetInvestmentHedging


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value000200000.0200000.0200000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax0.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.4-3.8168.81.3-15.712-13.42.10.7-5.4-2.6-33.010
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.81.71.70.80.80.52.30.11.00.5-5.60.80.80.7
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent8.5-44.710.49.161.5-3.218.4-0.747.671.4103.7-30.8-2.46.5

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.84.42.40.8-0.1-12.71.5-3.0-0.9-0.50.7-0.4-3.01.7
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-8.5-115.814.79.1-7.780.912.022.4-42.9-71.4-13.015.49.115.7

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.4-3.8168.81.3-15.712-13.42.10.7-5.4-2.6-33.010
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.4-9.9127.20.6-3.58.7-10.52.00.7-5.4-3.0-30.88.4
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0260.574.881.846.222.369.678.495.2100.0100.0115.493.377.8

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1500000.02900000.0200000.0-1100000.0-800000.0-3300000.0-2000000.01000000.0-400000.0-3400000.02400000.0100000.0-300000.01600000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value400000.0-600000.0400000.0300000.0300000.0200000.0-700000.0600000.0-200000.0-1100000.01500000.0200000.0300000.0400000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-26.7-20.7200.0-27.3-37.5-6.135.060.050.032.462.5200.0-100.025.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1800000.0100000.01100000.0300000.0300000.0-2900000.01200000.0-1100000.0-100000.00-100000.00-1400000.0100000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1120.03.4550.0-27.3-37.587.9-60.0-110.025.0-0.0-4.20.0466.76.2

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-100000.03400000.0-1300000.0-1700000.0-1400000.0-600000.0-2500000.01500000.0-100000.0-2300000.01000000.0-100000.0800000.01100000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent16.7117.2-650.0154.5175.018.2125.0150.025.067.641.7-100.0-266.768.8

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value69455237384044363437
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-6500000.05600000.011400000.0-1000000.0-1000000.0-2700000.0-200000.01100000.0-1000000.01900000.0500000.0-1200000.0800000.0300000.0900000.01000000.0-800000.0-400000.0600000.0400000.0100000.0-1700000.0-200000.0-200000.00500000.01700000.01200000.0-500000.0-1600000.0-1300000.01200000.01400000.0-300000.0900000.0-1300000.0100000.0100000.0200000.0-800000.0-700000.0-1600000.0-600000.0-1100000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherRestructuringCosts

us-gaap:OtherRestructuringCosts


Other
Period End2020-12-312020-09-30
Value1700000.03200000.0
Percentage of OtherRestructuringCosts100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.2-0.33.3-0.20.3-2.4-3.5-0.30.3-1.10.4-3.3-0.10.8-1.3-3.8-2.40.6-4.0-2.3-2.70.810-0.5-0.9-1.50.5-5.03.8-2.3-5.1-1.1-2.43.0-1.5-3.03.04.10.4-1.30.6-2.0-1.4-2.45.1-3.1
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


Payments
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-06-302011-03-312010-06-30
Value1500000.02200000.0500000.0300000.01500000.01700000.0400000.0600000.0800000.01200000.0700000.0600000.01600000.01800000.01500000.01500000.01700000.01600000.02700000.02400000.01500000.02500000.03200000.01100000.02800000.01100000.01200000.01200000.01000000.0700000.02400000.0
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Payments
Period End2020-09-30
Value300000.0
Percentage of PaymentsForRestructuring0.0

swm:Consolidated


Payments
Period End2020-09-302019-09-30
Value500000.01700000.0
Percentage of PaymentsForRestructuring0.0100.0

swm:EngineeredPapersSegment


Payments
Period End2020-09-302019-09-30
Value200000.01700000.0
Percentage of PaymentsForRestructuring0.0100.0

us-gaap:PaymentsForSoftware

us-gaap:PaymentsForSoftware


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value800000.0500000.0400000.01100000.01000000.0700000.01600000.01100000.01400000.01400000.01600000.0500000.0200000.0400000.0900000.01000000.0800000.0800000.01100000.0800000.0700000.0200000.0200000.0200000.0300000.0200000.0500000.0300000.0100000.0100000.0100000.0300000.0100000.00400000.0200000.0200000.0100000.0100000.02200000.0-1800000.0800000.01000000.014400000.0-8800000.02700000.0
Percentage of PaymentsForSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value113.00.00.23.40.00.00.00.00.00.60.00.00.00.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.0100.0100.00.00.00.00.00.0100.00.00.00.00.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

swm:Scapa


Payments
Period End2021-04-15
Value630
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.0-1.31700.00.00.00.00.00.00.00.0-1.72930.00.00.00.02800.00.40.030-0.10.02.42290.00.00.0
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.00.0100.0100.00.00.00.00.00.00.00.00.0100.0100.00.00.00.00.0100.00.0100.00.0100.0100.00.0100.0100.00.00.00.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired us-gaap:BusinessAcquisition

swm:Scapa


Payments
Period End2021-04-15
Value22
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-31
Value1.20.31.60.11.71.60.40.00.20.30.40.40.11.31.01.10.81.30.91.30.81.32.63.35.42.53.20.11.00.61.01.32.6
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


Restructuring
Period End2020-09-30
Value4.2
Percentage of RestructuringCharges0.0

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, swm:EngineeredPapersSegment


Restructuring
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.30.31.00.1
Percentage of RestructuringCharges108.3100.062.5100.0

us-gaap:RestructuringCharges us-gaap:StatementBusinessSegments

swm:Consolidated


Restructuring
Period End2020-09-302019-09-30
Value6.01.6
Percentage of RestructuringCharges0.0100.0

swm:EngineeredPapersSegment


Restructuring
Period End2021-03-312020-09-302020-03-312019-09-30
Value1.75.90.11.6
Percentage of RestructuringCharges566.70.0100.0100.0

swm:Unallocated


Restructuring
Period End2020-09-30
Value0.1
Percentage of RestructuringCharges0.0

us-gaap:RestructuringCosts

us-gaap:RestructuringCosts


Restructuring
Period End2020-12-312020-09-302019-12-312019-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5.99.21.71.60.60.0200.00.00.53.20.02.80.70.00.00.00.0370.00.00.03.32.23.1163.43.40.00.04.00.1
Percentage of RestructuringCosts100.0100.0100.0100.0100.00.0100.00.00.0100.0100.00.0100.0100.00.00.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:RestructuringReserveAcceleratedDepreciation

us-gaap:RestructuringReserveAcceleratedDepreciation


Restructuring
Period End2020-12-312020-09-30
Value1700000.01200000.0
Percentage of RestructuringReserveAcceleratedDepreciation100.0100.0

us-gaap:RestructuringReserveAcceleratedDepreciation us-gaap:RestructuringCostAndReserve

us-gaap:FacilityClosing


Restructuring
Period End2020-09-30
Value1200000.0
Percentage of RestructuringReserveAcceleratedDepreciation100.0

us-gaap:RestructuringReserveTranslationAndOtherAdjustment

us-gaap:RestructuringReserveTranslationAndOtherAdjustment


Restructuring
Period End2021-06-302021-03-31
Value0-100000.0
Percentage of RestructuringReserveTranslationAndOtherAdjustment0.0100.0

us-gaap:RestructuringSettlementAndImpairmentProvisions

us-gaap:RestructuringSettlementAndImpairmentProvisions


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.31.74.26.01.60.11.71.60.40.00.30.40.60.43.91.51.61.1211.30.91.84.11.35.24.06.53.33.20.1380.60.71.63.40.65.3185.76.60.71.06.20.72.93.6
Percentage of RestructuringSettlementAndImpairmentProvisions100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringSettlementAndImpairmentProvisions us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.30.34.25.71.60.11.60.6
Percentage of RestructuringSettlementAndImpairmentProvisions56.517.6100.095.0100.0100.094.137.5

us-gaap:OtherRestructuring


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-30
Value1.01.40.00.30.11.0
Percentage of RestructuringSettlementAndImpairmentProvisions43.582.40.05.05.962.5

us-gaap:RestructuringSettlementAndImpairmentProvisions us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, us-gaap:Corporate


Restructuring
Period End2020-09-30
Value0.1
Percentage of RestructuringSettlementAndImpairmentProvisions1.7

us-gaap:FacilityClosing, swm:EngineeredPapersSegment


Restructuring
Period End2021-06-30
Value1.0
Percentage of RestructuringSettlementAndImpairmentProvisions43.5

us-gaap:RestructuringSettlementAndImpairmentProvisions us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Restructuring
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.00.00.00.51.10.00.00.00.30.40.40.40.31.20.80.4200.00.00.60.00.0-0.2
Percentage of RestructuringSettlementAndImpairmentProvisions0.00.00.031.264.70.00.00.0100.0100.066.7100.07.780.050.036.495.80.00.033.30.00.0-3.8

swm:EngineeredPapersSegment


Restructuring
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2.34.25.91.10.10.61.60.40.00.00.00.20.03.60.40.80.50.91.30.90.93.91.45.33.8
Percentage of RestructuringSettlementAndImpairmentProvisions100.0100.098.368.8100.035.3100.0100.00.00.00.033.30.092.326.750.045.54.2100.0100.050.095.1107.7101.995.0

us-gaap:RestructuringSettlementAndImpairmentProvisions us-gaap:StatementGeographical, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

swm:FrancePolandAndTheUnitedStates, us-gaap:EmployeeSeverance, swm:EngineeredPapersSegment


Restructuring
Period End2020-12-312020-09-30
Value1.71.8
Percentage of RestructuringSettlementAndImpairmentProvisions40.530.0

us-gaap:RestructuringSettlementAndImpairmentProvisions us-gaap:StatementScenario, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType

srt:ScenarioForecast, us-gaap:EmployeeSeverance, swm:EngineeredPapersSegment, us-gaap:SubsequentEvent


Restructuring
Period End2020-12-31
Value0.0
Percentage of RestructuringSettlementAndImpairmentProvisions0.0

us-gaap:SellingExpense

us-gaap:SellingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value119.19.69.08.89.57.98.68.68.68.58.99.29.18.78.18.28.36.56.06.46.46.25.55.15.45.55.55.55.55.74.75.55.06.44.35.76.05.75.75.55.14.74.54.65.2
Percentage of SellingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value200000.0300000.0300000.0200000.0200000.0100000.000100000.000100000.00100000.00100000.00100000.00100000.00100000.000100000.000100000.00000100000.000000100000.0000100000.000100000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.0100.00.00.0100.00.00.00.00.0100.00.00.00.00.00.0100.00.00.00.0100.00.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value200000.0300000.0300000.0200000.0200000.0100000.000100000.000100000.00100000.00100000.00100000.00100000.00100000.000100000.000100000.00000100000.000000100000.0000100000.000100000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.0100.00.00.0100.00.00.00.00.0100.00.00.00.00.00.0100.00.00.00.0100.00.00.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.03.10.10.0-0.11.0-0.10.00.10.90.20.10.22.50.10.1-0.11.10.10.00.00.60.00.00.02.90.00.00.352
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.00.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3.10.10.0-0.11.0-0.10.00.10.90.20.10.22.50.10.1-0.11.10.10.00.00.60.00.00.02.90.0105-0.3-52.2
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.00.0-100.0-99.8

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-100000.0100000.00200000.0100000.00100000.0100000.00-100000.0200000.0200000.00-200000.0100000.0100000.0000200000.00100000.00300000.00100000.0100000.0200000.0100000.0-200000.0200000.0
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted


Undistributed
Period End2021-06-302020-06-30
Value-100000.0100000.0
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value357300.0366300.0232800.0214100.0197700.0169100.0147900.096100.0153200.0140100.0131100.0146700.0133800.0122600.0142400.0134500.0127800.0133200.0122700.0114900.0127200.0114200.0112300.0187700.0162200.0163300.0392700.0177900.0155200.0138500.0116000.0116000.0366200.0317300.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:BankOverdraftFacilities us-gaap:LongtermDebtType

swm:BankOverdraftFacilities

us-gaap:BankOverdrafts


Bank
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.76.16.12027283046454533
Percentage of BankOverdraftFacilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherCurrentLiabilities us-gaap:BusinessAcquisition

swm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherCurrentLiabilities

swm:Scapa


Business
Period End2021-04-15
Value85
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherCurrentLiabilities100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseAfterYearFive

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseAfterYearFive


Deferred
Period End2020-12-31
Value100000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseAfterYearFive100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinNextTwelveMonths

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinNextTwelveMonths


Deferred
Period End2020-12-31
Value1300000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinNextTwelveMonths100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFive

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFive


Deferred
Period End2020-12-31
Value400000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFive100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFour

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFour


Deferred
Period End2020-12-31
Value400000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearFour100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearThree

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearThree


Deferred
Period End2020-12-31
Value1100000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearThree100.0

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearTwo

swm:DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearTwo


Deferred
Period End2020-12-31
Value1300000.0
Percentage of DeferredDebtIssuanceCostsExpectedFutureAmortizationExpenseinYearTwo100.0

swm:DeferredTaxAssetsOperatingLossCarryforwardsandTaxCreditCarryforwards

swm:DeferredTaxAssetsOperatingLossCarryforwardsandTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1049393941042526
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsandTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0

swm:IndefiniteLivedIntangibleAssetsExcludingGoodwillGross us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

swm:IndefiniteLivedIntangibleAssetsExcludingGoodwillGross

us-gaap:TradeNames, swm:AdvancedMaterialsStructuresSegment


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value2020202020202020202020202020202020201235
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwillGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:IntangibleAssetsAccumulatedForeignExchangeGainLoss us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

swm:IntangibleAssetsAccumulatedForeignExchangeGainLoss

us-gaap:CustomerRelationships, swm:AdvancedMaterialsStructuresSegment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-1900000.0-1100000.0-2900000.0-300000.01900000.02900000.01800000.03100000.0900000.01600000.0700000.0-200000.0-500000.0-4100000.0-2300000.0-1200000.01200000.02900000.03100000.0600000.0
Percentage of IntangibleAssetsAccumulatedForeignExchangeGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DevelopedTechnologyRights, swm:AdvancedMaterialsStructuresSegment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value100000.0100000.0-200000.0200000.0400000.0500000.0400000.0600000.0300000.0300000.0200000.0100000.00-300000.0-100000.00300000.0300000.0400000.0100000.0
Percentage of IntangibleAssetsAccumulatedForeignExchangeGainLoss-5.3-9.16.9-66.721.117.222.219.433.318.828.6-50.0-0.07.34.3-0.025.010.312.916.7

swm:IntangibleAssetsAccumulatedForeignExchangeGainLoss us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:TradeNames, swm:AdvancedMaterialsStructuresSegment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-300000.0-200000.0-600000.0-200000.00100000.00100000.0-100000.00-100000.0-200000.0-200000.0-500000.0-400000.0-300000.0-300000.0-100000.0-100000.0200000.0
Percentage of IntangibleAssetsAccumulatedForeignExchangeGainLoss15.818.220.766.70.03.40.03.2-11.10.0-14.3100.040.012.217.425.0-25.0-3.4-3.233.3

swm:IntangibleAssetsAccumulatedForeignExchangeGainLoss us-gaap:StatementBusinessSegments

swm:AdvancedMaterialsStructuresSegment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-1500000.0-700000.0-2800000.0200000.02600000.03700000.02500000.04000000.01500000.02200000.01200000.0200000.0-200000.0-4200000.0-2100000.0-900000.01800000.03500000.03800000.0
Percentage of IntangibleAssetsAccumulatedForeignExchangeGainLoss78.963.696.6-66.7136.8127.6138.9129.0166.7137.5171.4-100.040.0102.491.375.0150.0120.7122.6

swm:IntangibleAssetsAccumulatedImpairmentLoss us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

swm:IntangibleAssetsAccumulatedImpairmentLoss

us-gaap:TradeNames, swm:AdvancedMaterialsStructuresSegment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.0
Percentage of IntangibleAssetsAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

swm:LeaseLiability

swm:LeaseLiability


Lease
Period End2020-12-31
Value24
Percentage of LeaseLiability100.0

swm:LeaseRightOfUseAsset

swm:LeaseRightOfUseAsset


Lease
Period End2020-12-312019-12-31
Value2223
Percentage of LeaseRightOfUseAsset100.0100.0

swm:LeaseRightOfUseAssetAccumulatedDepreciation

swm:LeaseRightOfUseAssetAccumulatedDepreciation


Lease
Period End2020-12-312019-12-31
Value116.2
Percentage of LeaseRightOfUseAssetAccumulatedDepreciation100.0100.0

swm:LeaseRightOfUseAssetGross

swm:LeaseRightOfUseAssetGross


Lease
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value3430293029
Percentage of LeaseRightOfUseAssetGross100.0100.0100.0100.0100.0

swm:LeaseRightOfUseAssetGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Lease
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value2924242424
Percentage of LeaseRightOfUseAssetGross84.182.382.382.284.0

us-gaap:MachineryAndEquipment


Lease
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value5.45.25.25.34.6
Percentage of LeaseRightOfUseAssetGross15.717.317.417.515.6

swm:LesseeLeaseLiabilityPaymentsDue

swm:LesseeLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value29
Percentage of LesseeLeaseLiabilityPaymentsDue100.0

swm:LesseeLeaseLiabilityPaymentsDueAfterYearFive

swm:LesseeLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value6400000.0
Percentage of LesseeLeaseLiabilityPaymentsDueAfterYearFive100.0

swm:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths

swm:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value7000000.0
Percentage of LesseeLeaseLiabilityPaymentsDueNextTwelveMonths100.0

swm:LesseeLeaseLiabilityPaymentsDueYearFive

swm:LesseeLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value2400000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearFive100.0

swm:LesseeLeaseLiabilityPaymentsDueYearFour

swm:LesseeLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value3400000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearFour100.0

swm:LesseeLeaseLiabilityPaymentsDueYearThree

swm:LesseeLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value4100000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearThree100.0

swm:LesseeLeaseLiabilityPaymentsDueYearTwo

swm:LesseeLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value5800000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearTwo100.0

swm:LesseeLeaseLiabilityUndiscountedExcessAmount

swm:LesseeLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value4800000.0
Percentage of LesseeLeaseLiabilityUndiscountedExcessAmount100.0

swm:LongTermDebtMaturityAfterYearFour

swm:LongTermDebtMaturityAfterYearFour


Long
Period End2021-06-302021-03-312020-09-30
Value686345531
Percentage of LongTermDebtMaturityAfterYearFour100.0100.0100.0

swm:OperatingAndFinanceLeaseRightOfUseAsset

swm:OperatingAndFinanceLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-31
Value2223
Percentage of OperatingAndFinanceLeaseRightOfUseAsset100.0100.0

swm:OperatingLeaseRightOfUseAssetAccumulatedDepreciation

swm:OperatingLeaseRightOfUseAssetAccumulatedDepreciation


Operating
Period End2020-12-312019-12-31
Value105.5
Percentage of OperatingLeaseRightOfUseAssetAccumulatedDepreciation100.0100.0

swm:OperatingLeaseRightOfUseAssetGross

swm:OperatingLeaseRightOfUseAssetGross


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value3026262626
Percentage of OperatingLeaseRightOfUseAssetGross100.0100.0100.0100.0100.0

swm:OperatingLeaseRightOfUseAssetGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value2521212121
Percentage of OperatingLeaseRightOfUseAssetGross85.582.682.282.082.8

us-gaap:MachineryAndEquipment


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value4.34.54.64.74.4
Percentage of OperatingLeaseRightOfUseAssetGross14.217.017.417.616.8

swm:OtherLiabilitiesFrenchLawCetAccount

swm:OtherLiabilitiesFrenchLawCetAccount


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7000000.06300000.05500000.05600000.05300000.06200000.08100000.08900000.08400000.08600000.08100000.0
Percentage of OtherLiabilitiesFrenchLawCetAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:RestructuringAndRelatedCostCumulativeCost us-gaap:StatementBusinessSegments

swm:RestructuringAndRelatedCostCumulativeCost

swm:EngineeredPapersSegment


Restructuring
Period End2021-06-302021-03-31
Value8500000.07200000.0
Percentage of RestructuringAndRelatedCostCumulativeCost100.0100.0

us-gaap:AccountsReceivableGrossCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableGrossCurrent

swm:BusinessTaxCredit


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4.05.24.04.33.13.74.25.45.66.113
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

swm:ContractReceivable


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.34.92.14.81.00.80.40.00.41.64.2
Percentage of AccountsReceivableGrossCurrent7.594.252.5111.632.321.69.50.07.126.231.6

swm:OtherReceivable


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1420192113171924191911
Percentage of AccountsReceivableGrossCurrent360.0384.6482.5490.7438.7475.7471.4455.6346.4324.685.7

us-gaap:TradeAccountsReceivable


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value13011413012098976978708570
Percentage of AccountsReceivableGrossCurrent3272.52203.83272.52795.33167.72640.51661.91444.41260.71401.6531.6

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccruedIncomeTaxesNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1617171717182125252527233336360.0
Percentage of AccruedIncomeTaxesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1100000.01500000.01700000.01000000.0800000.0400000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1100000.01500000.01700000.01000000.0800000.0400000.0300000.0400000.0-600000.0700000.0700000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AociTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AociTaxAttributableToParent

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Aoci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-11700000.0-12200000.0-11600000.0-12000000.0-12300000.0-12600000.0-12800000.0-12100000.0-12700000.0-12500000.0-11400000.0-13800000.0
Percentage of AociTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Aoci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-2600000.0-2800000.0-2800000.0-3900000.0-4200000.0-4400000.0-1600000.0-2800000.0-1700000.0-1600000.0-1600000.0
Percentage of AociTaxAttributableToParent22.223.024.132.534.134.912.523.113.412.814.0

us-gaap:AccumulatedTranslationAdjustment


Aoci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-6800000.0-6800000.0-10100000.0-8800000.0-7100000.0-5700000.0-5000000.0-2600000.0-4100000.0-4000000.0-1700000.0-4500000.0
Percentage of AociTaxAttributableToParent58.155.787.173.357.745.239.121.532.332.014.932.6

us-gaap:BusinessAcquisitionSharePrice us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:BusinessAcquisitionSharePrice

swm:Scapa, us-gaap:SubsequentEvent


Business
Period End2021-04-152021-01-27
Value2.152.1
Percentage of BusinessAcquisitionSharePrice100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

swm:Scapa


Business
Period End2021-04-15
Value585
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value117117121117
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

swm:Scapa


Business
Period End2021-04-15
Value22
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value1.61.62.11.6
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

swm:Scapa


Business
Period End2021-04-15
Value9800000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

swm:Scapa


Business
Period End2021-04-15
Value67
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value8.68.68.88.6
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value3000000.03000000.02400000.03000000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt

swm:Scapa


Business
Period End2021-04-15
Value15
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value2000000.02000000.03600000.02000000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

swm:Scapa


Business
Period End2021-04-15
Value61
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill

swm:Scapa


Business
Period End2021-04-15
Value246
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value81818581
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

swm:Scapa


Business
Period End2021-04-15
Value246
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-13
Value818185
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.00.00.0

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

swm:Scapa, swm:TradeNamesAndOther


Business
Period End2021-04-15
Value7.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles3.1

swm:Scapa, us-gaap:CustomerRelationships


Business
Period End2021-04-15
Value201
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles81.8

swm:Scapa, us-gaap:DevelopedTechnologyRights


Business
Period End2021-04-15
Value37
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles15.1

swm:TekraLLCAndTrientLLC, swm:TradeNamesAndOther


Business
Period End2020-09-302020-06-302020-03-13
Value101011
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.00.00.0

swm:TekraLLCAndTrientLLC, us-gaap:CustomerRelationships


Business
Period End2020-09-302020-06-302020-03-13
Value636366
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory

swm:Scapa


Business
Period End2021-04-15
Value60
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value14141414
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

swm:Scapa


Business
Period End2021-04-15
Value390
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value109109112109
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther

swm:Scapa


Business
Period End2021-04-15
Value33
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets

swm:Scapa


Business
Period End2021-04-15
Value26
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value3.73.73.33.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

swm:Scapa


Business
Period End2021-04-15
Value152
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

swm:Scapa


Business
Period End2021-04-15
Value653
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

swm:TekraLLCAndTrientLLC


Business
Period End2020-09-302020-06-302020-03-312020-03-13
Value170170172170
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet0.00.00.00.0

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4036353531466060564944
Percentage of CapitalizedComputerSoftwareAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedComputerSoftwareNet


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value12118.37.44.42.53.87.0111723
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1298622637674760574620634
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility, swm:NewCreditFacilityRevolvingCreditAgreement


Debt
Period End2020-12-31
Value50
Percentage of DebtInstrumentCarryingAmount0.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, swm:NewCreditFacilityRevolvingCreditAgreement, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-31
Value3887550
Percentage of DebtInstrumentCarryingAmount29.912.10.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

swm:SeniorUnsecuredNotesDue2026, us-gaap:CorporateBondSecurities


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3433433433433423423423420.0
Percentage of DebtInstrumentCarryingAmount53.950.945.20.059.655.254.00.00.0

swm:SeniorUnsecuredNotesDue2026, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value344344343343
Percentage of DebtInstrumentCarryingAmount26.555.30.00.0

swm:TermLoanBFacility, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value350
Percentage of DebtInstrumentCarryingAmount26.9

swm:TermLoanFacility, us-gaap:SecuredDebt


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1951961961971971981981991990.0
Percentage of DebtInstrumentCarryingAmount0.030.729.125.90.034.432.031.40.00.0

swm:TermLoanFacilityA, us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-31
Value194195195
Percentage of DebtInstrumentCarryingAmount15.031.30.0

swm:UsRevolver, us-gaap:LineOfCredit


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value901272120.019647676324344344344412417131
Percentage of DebtInstrumentCarryingAmount14.118.827.90.03.310.312.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:DeferredProfitSharing


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3.94.75.04.83.94.64.84.64.46.56.69.1
Percentage of DebtInstrumentCarryingAmount0.30.80.00.80.60.60.00.80.71.00.00.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentFaceAmount

swm:TermLoanB


Debt
Period End2021-02-10
Value350
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

swm:TermLoanB, us-gaap:SubsequentEvent


Debt
Period End2021-02-10
Value350
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFairValue us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFairValue

us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value370373371371359348378371358354331
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnsecuredDebt


Debt
Period End2020-12-312019-12-31
Value371378
Percentage of DebtInstrumentFairValue100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

swm:SeniorUnsecuredNotesDue2026, us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-09-302019-12-312018-12-31
Value7.2487.2487.2480.072480.07248
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:LongtermDebtType

us-gaap:BankOverdrafts


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.260.00260.00260.00240.00140.0030.00550.0074
Percentage of DebtInstrumentInterestRateEffectivePercentage0.03.63.60.00.00.00.00.0

us-gaap:LoansPayable


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.20.00620.01040.01150.0080.01080.02280.0243
Percentage of DebtInstrumentInterestRateEffectivePercentage0.08.614.30.00.00.00.00.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

swm:SeniorUnsecuredNotesDue2026, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value5600000.05800000.06100000.06900000.0
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:LongtermDebtType

us-gaap:CorporateBondSecurities


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6300000.06500000.06700000.06900000.07100000.07300000.07500000.07600000.0
Percentage of DebtInstrumentUnamortizedDiscount0.00.00.0100.00.00.00.00.0

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DebtLongtermAndShorttermCombinedAmount


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value593542622684440571
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value14191417151313139.98.17.2
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredCompensationPlanAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value18141012109.61010.07.66.46.2
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsGross


Deferred
Period End2021-06-302021-02-102018-12-31
Value144.03.6
Percentage of DeferredFinanceCostsGross100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-10-282014-12-31
Value174.34.64.95.25.65.96.26.56.97.27.25.05.35.86.26.77.27.07.47.88.38.77.42.2
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value200000.02600000.03400000.04100000.04700000.03700000.04100000.0400000.0400000.0300000.0
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value59565252
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-31
Value126.90.0
Percentage of DeferredTaxAssetsCapitalLossCarryforwards100.0100.00.0

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsDerivativeInstruments


Deferred
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-31
Value2500000.0100000.0005500000.02200000.0
Percentage of DeferredTaxAssetsDerivativeInstruments100.0100.00.00.0100.0100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value37456073760.0
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value18316917619320762904374105114
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4400000.03900000.01200000.04700000.0100000.0800000.01900000.03900000.0-300000.01700000.0-400000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value21191415202019
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-31
Value700000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value500000.0400000.0800000.0400000.0200000.03400000.04400000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3200000.03500000.009800000.04100000.00
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.00.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.30.10.00.40.71.5-3.7-3.41.03.416
Percentage of DeferredTaxLiabilitiesOther100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value55525140347281
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1312109.1
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value17232927
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax132.8184.9277.1297.8

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-16000000.0-15200000.0-13500000.0-12500000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-17800000.0-23300000.0-29100000.0-27100000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax111.2153.3215.6216.8

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-2600000.0-2600000.0-3000000.0-3400000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value9300000.05900000.0800000.04600000.00
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.320.00530.01280.01140.0112
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.30.0320.04290.0360.0411
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate718.7603.8335.2315.8367.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.970.01960.01750.01750.019
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value353129303232
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value125119112124123123
Percentage of DefinedBenefitPlanBenefitObligation349.4375.9380.7406.9380.2383.2

us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear

country:US


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value3600000.03600000.03300000.03200000.03200000.02000000.01900000.01900000.03400000.03700000.03700000.03400000.0
Percentage of DefinedBenefitPlanExpectedAmortizationNextFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value900000.0900000.0900000.0800000.0800000.0800000.0800000.0800000.0800000.01200000.01200000.0
Percentage of DefinedBenefitPlanExpectedAmortizationNextFiscalYear27.328.128.140.042.142.123.521.621.635.30.0

us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value900000.0900000.0800000.0800000.0
Percentage of DefinedBenefitPlanExpectedAmortizationNextFiscalYear0.00.00.00.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3600000.03500000.01900000.03500000.0
Percentage of DefinedBenefitPlanExpectedAmortizationNextFiscalYear0.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-1200000.0-1200000.0-1100000.0-1100000.0
Percentage of DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-3600000.0-3500000.0-1900000.0-3500000.0
Percentage of DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear300.0291.7172.7318.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value108.07.37.7
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value36373839
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter359.8470.0524.7507.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value400000.01600000.02400000.01400000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8600000.08500000.08600000.08500000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths2150.0531.2358.3607.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1700000.01300000.01800000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8000000.08000000.08000000.08200000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive470.6615.4444.4911.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1700000.01700000.0800000.01300000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8100000.08100000.08200000.08300000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour476.5476.51025.0638.5

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1100000.0600000.01200000.0700000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8200000.08400000.08300000.08300000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree745.51400.0691.71185.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1000000.01000000.0500000.02100000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value8500000.08400000.08400000.08400000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo850.0840.01680.0400.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-35000000.0-30800000.0-27400000.0-27300000.0-26300000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value9300000.05900000.0800000.04600000.0-4300000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan-26.6-19.2-2.9-16.816.3

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value35312930
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value125119112124
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets349.4375.9380.7406.9

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3531242528
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0100.0100.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value125119112124123
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation349.4375.9451.0484.8436.9

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:StatementScenario, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

srt:ScenarioForecast, swm:AlternativeInvestment, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.0

srt:ScenarioForecast, us-gaap:DefinedBenefitPlanCashAndCashEquivalents, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.0

srt:ScenarioForecast, us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-12-312020-12-31
Value6.00.1
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.00.0

srt:ScenarioForecast, us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCap, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-12-312020-12-31
Value2.00.09
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.00.0

srt:ScenarioForecast, us-gaap:DefinedBenefitPlanEquitySecuritiesUsSmallCap, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-12-312020-12-31
Value1.00.05
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.00.0

srt:ScenarioForecast, us-gaap:FixedIncomeSecurities, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-12-312020-12-31
Value91.00.76
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.00.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:StatementScenario, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

srt:ScenarioForecast, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-12-312020-12-31
Value100.01.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage0.00.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

swm:AlternativeInvestment, country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.00.020.020.030.02
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value36.00.410.430.38
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1800.02050.02150.01266.7

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.00.010.010.010.01
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations50.050.050.033.350.0

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6.00.150.140.140.2
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations300.0750.0700.0466.71000.0

us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCap, country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value30.00.310.280.31
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1500.01550.01400.01033.3

us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCap, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.00.050.050.050.07
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0250.0250.0166.7350.0

us-gaap:DefinedBenefitPlanEquitySecuritiesUsSmallCap, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.00.030.030.030.04
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations50.0150.0150.0100.0200.0

us-gaap:FixedIncomeSecurities, country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value32.00.260.270.280.54
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1600.01300.01350.0933.32700.0

us-gaap:FixedIncomeSecurities, country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value90.00.760.770.680.67
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations4500.03800.03850.02266.73350.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:FR, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations5000.05000.05000.03333.35000.0

country:US, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations5000.05000.05000.03333.35000.0

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.52.61.23.28.11411155.47.54.94.97.49.66.8
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:AccountsReceivable, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument