KN


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfRevenue

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperations
us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense

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

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:InventoryFinishedGoods

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

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

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:RetirementPlanSponsorLocation
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:PropertySubjectToOrAvailableForOperatingLease

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:ConsolidationItems
kn:CorporateExpenseandOther

kn:CostofGoodsSoldRestructuringCharges
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
kn:DebtIssuanceCostsAttributabletotheEquityComponent

kn:EffectiveIncomeTaxRateReconciliationDiscreteItems

kn:EffectiveTaxRateExcludingDiscreteItems

kn:IncreaseDecreaseAccruedTaxesNet
us-gaap:AwardType
kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsExpiredinPeriodWeightedAverageExercisePrice

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AssetImpairmentCharges
us-gaap:ImpairedLongLivedAssetsHeldAndUsedByType

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:Depreciation
us-gaap:DisposalGroupClassification
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleAmountOfImpairmentLoss
us-gaap:ConsolidationItems
us-gaap:IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxHolidayAggregateDollarAmount
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxHolidayIncomeTaxBenefitsPerShare

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebtExcludingAmortization

us-gaap:InterestRevenueExpenseNet
us-gaap:ConsolidationItems
us-gaap:Range, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityCommitmentFeePercentage

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:PaymentsForProceedsFromInvestments

us-gaap:PaymentsForRestructuring
us-gaap:RestructuringCostAndReserve

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:ProceedsAndExcessTaxBenefitFromSharebasedCompensation

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RestructuringAndRelatedCostIncurredCost
us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve
us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:IncomeStatementLocation, us-gaap:RestructuringCostAndReserve
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:IncomeStatementLocation, us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:Range, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:Range, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:Range, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardDate, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

dei:EntityCommonStockSharesOutstanding

kn:DeferredTaxAssetsValuationAllowanceJudgmentRegardingtheRealizabilityoftheBeginningoftheYearDeferredTaxAsset
us-gaap:RetirementPlanType
kn:DefinedBenefitPlanAmountsRecognizedontheBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeLoss
us-gaap:IncomeTaxAuthority
kn:OperatingLossCarryforwardsNotSubjecttoExpiration
us-gaap:IncomeTaxAuthority
kn:OperatingLossCarryforwardsSubjecttoExpiration
us-gaap:IncomeTaxAuthority
kn:OperatingLossCarryforwardsSubjecttoExpirationin1020years
us-gaap:IncomeTaxAuthority
kn:OperatingLossCarryforwardsSubjecttoExpirationin510years

kn:OtherSundryAccuredLiabilitesCurrent
us-gaap:RetirementPlanSponsorLocation
kn:PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesTax
us-gaap:RetirementPlanType
kn:PensionandOtherPostretirementDefinedBenefitPlansOtherLIabilities
us-gaap:AwardType
kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
kn:SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestExercisedAggregateIntrinsicValue

kn:StockholdersEquityExcludingNetFormerParentCompanyInvestment

us-gaap:AccruedIncomeTaxes

us-gaap:AccruedInsuranceCurrentAndNoncurrent

us-gaap:AccruedMarketingCostsCurrent
us-gaap:RetirementPlanSponsorLocation
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:RetirementPlanType

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:BilledContractReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

us-gaap:CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConvertibleLongTermNotesPayable
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConvertibleNotesPayable
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConvertibleNotesPayableCurrent

us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFairValue
us-gaap:Range, us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxesAndOtherAssetsNoncurrent

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsHedgingTransactions

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanSponsorLocation
us-gaap:RetirementPlanSponsorLocation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable
us-gaap:DisposalGroupClassification
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities

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

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:InventoryGross

us-gaap:InventoryRawMaterials

us-gaap:InventoryValuationReserves

us-gaap:InventoryWorkInProcess

us-gaap:Investments

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:DisposalGroupClassification

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCredit
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermLineOfCredit
us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherSundryLiabilitiesNoncurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrualClassifiedCurrent

us-gaap:RestructuringReserve
us-gaap:BalanceSheetLocation
us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforwardAmount
us-gaap:TaxCreditCarryforward, us-gaap:TaxPeriod

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Accrued Income Taxes Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Payable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
InventoryNet
Inventory Finished Goods
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:CommonStockValue ██████████████████████████████▁0.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.850.850.850.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█94.90550394.983586NA92.47331891.58915691.79598NA93.85944692.50727990.535188NA90.17192890.7317689.718318NA90.37311289.36135288.973503NA89.31780688.65245388.53674NA88.42962785.14429885.107579NA85.04799185.04233485.126796NA85.01915985.01915985.019159
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁92.4932292.263705NA91.68876591.58915691.79598NA91.39853991.01821390.535188NA90.17192890.06308989.718318NA89.46999689.36135288.973503NA88.72088888.65245388.53674NA88.42962785.14429885.107579NA85.04799185.04233485.023862NA85.01915985.01915985.019159
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█0.583651.76844NA4.5591316.1571275.381017NA2.0641214.3066335.970833NA5.658266.2772836.100498NA4.0923384.4462614.024573NA5.2274275.8554484.940416NA3.9790183.38172.524261NA1.8070221.7503030.386824NANANANA
us-gaap:EarningsPerShareBasic ▆▆▇▆▅▆▆▆▆▆█▅▆▆█▆▅▆▆▆▅▅▁▅▅▅▆▅▄▆▇▇▆▆0.190.140.320.06-0.21-0.10.220.280.06-0.030.88-0.180.050.00.960.18-0.33-0.040.21-0.08-0.28-0.33-2.11-0.17-0.19-0.19-0.010000000000000009-0.17-0.930.090.380.520.20.14
us-gaap:EarningsPerShareDiluted ▆▆▇▆▅▆▆▆▆▆█▅▆▆█▆▅▆▆▆▅▅▁▅▅▅▆▅▄▆▇▇▆▆0.190.130.320.06-0.21-0.10.210.270.06-0.030.87-0.180.050.00.940.17-0.33-0.040.22-0.08-0.28-0.33-2.11-0.17-0.19-0.19-0.010000000000000009-0.17-0.930.090.380.520.20.14
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▄▄▅▃▂▂▄▅▃▃█▂▃▃▅▄▁▃▄▄▂▂▃▃▄▃1.9e-071.4e-073.2e-076e-08-2.1e-07-1.4e-072.3000000000000002e-072.8e-076e-08-3e-088.8e-07-2.0000000000000002e-075.0000000000000004e-080.03.6e-071.7000000000000001e-07-3.4000000000000003e-07-5.0000000000000004e-082.0000000000000002e-072.4e-07-8e-08-1.4e-07-7e-085.0000000000000004e-081.6e-076e-08NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▄▄▅▃▂▂▄▅▃▃█▂▃▃▅▄▁▃▄▄▃▂▃▃▄▃1.8e-071.3e-073.2e-076e-08-2.1e-07-1.4e-072.2e-072.7e-076e-08-3e-088.7e-07-2.0000000000000002e-075.0000000000000004e-080.03.5e-071.7000000000000001e-07-3.4000000000000003e-07-5.0000000000000004e-081.9e-072.4e-07-8e-08-1.4e-07-7e-085.0000000000000004e-081.6e-076e-08NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
 TTM Greenblatt ROC _ _▇▇█▇▆▇██▇▇██▇▇█▇▆▇██▇▇▁▆▆▆▇▆▆▇█22.318.337.613.6-12.4-9.630.833.612.44.433.729.610.24.333.420.9-16.42.628.326.5-1.8-5.9-198.0-12.4-12.9-11.8-3.67-16.406-44.18711.16241.155NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▅█▃▃▃▂▄▃▅▅▄▄▅▅▄▄▄▄▃▃▄▄▁▄▂▁▁▁7.411.14.94.84.13.56.05.27.36.76.26.57.37.06.16.26.36.15.35.25.65.42.26.43.22.72.12.6NANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▆▆▇▆▅▅▆▆▆▆█▅▆▆█▆▅▆▅▆▅▅▁▅▆▄▅▅▄▆▇▇▆▆18.97.335.116.0-15.2-17.823.119.73.22.180.7-24.0-4.94.988.921.0-23.013.5-23.319.5-30.5-13.9-197.9-33.3-7.7-67.8-38.326-48.851-88.0025.87851.97668.04525.864-7.387
us-gaap:CostOfGoodsAndServicesSold ▃▄█▅▁▁▇▇▅▂▅▇▃▂▄▄116.1123.0151.2130.6103.5105.5143.6142.3128.4110.8129.2146.4115.1113.2125.7121.7NANANANANANANANANANANANANANANANANANA
us-gaap:CostOfRevenue ▃▄█▅▁▁▇▇▅▂▅▇▃▂▄▄116.1123.0151.2130.6103.5105.5143.6142.3128.4110.8129.2146.4115.1113.2125.7121.7NANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▅▅▆▄▂▃▆▆▅▄▆▆▄▄▆▅▄▄▆▆▄▄▂▆▃▃▃▃▁▅██▇▆83.778.092.075.247.856.289.693.576.468.594.389.873.265.389.682.571.767.694.094.972.966.843.488.756.653.863.652.19333.78583.057114.2117.986101.22894.563
us-gaap:IncomeLossFromContinuingOperations ▄▄▅▃▂▂▄▅▃▃█▂▃▃▅▄▁▃▄▄▂▂▃▃▄▃17.412.529.65.6-19.5-12.821.125.45.9-2.779.4-17.84.4-0.431.915.4-30.3-4.717.520.9-6.8-12.5-6.64.813.35.0NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▇▇█▇▆▇██▇▇██▇▇█▇▆▇█▇▇▇▁▆▆▇▇▆▆▇██▇▇18.815.232.47.9-18.4-10.626.730.49.3-0.129.625.35.80.431.515.8-23.0-4.925.420.9-5.4-10.1-202.5-18.3-15.8-12.3-3.303-16.136-45.80610.14335.28838.27115.83612.104
us-gaap:IncomeTaxExpenseBenefit ▅▅▅▅▅▅▅▅▅▅▁█▅▅▅▅▅▅▅▅▅▅▄▄▅▅▅▅▇▅▅▄▅▅1.42.72.82.31.12.25.65.03.42.6-49.843.11.40.85.40.47.3-0.27.90.01.42.4-15.5-3.40.33.5-2.171-1.52733.0972.52.315-5.989-0.8350.21
us-gaap:IncomeTaxesPaid ▄▄█▁▃▅▂▃▂▄█▃▃▄▄3.94.57.31.32.85.42.23.02.54.47.73.43.13.84.3NANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType kn:ConvertibleNotesDueTwentyTwentyOne,us-gaap:ConvertibleDebt█████▇▇▇▇▇▇▆▆▆▆▆▆▅▄▆▁3.63.63.53.53.53.43.43.33.33.33.33.23.23.13.13.13.13.02.83.12.0NANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▆▁▆▂▇▁▆▁▆▁▆▂▇▁▇▃█▃█▄3.20.43.10.93.70.43.20.53.30.53.61.33.70.44.01.54.31.54.62.0NANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▆▇▆▅▆▆▆▆▆█▅▆▆█▆▅▆▆▆▅▅▁▅▅▅▆▅▄▆▇▇▆▆17.612.529.65.6-19.5-9.120.525.45.9-2.779.6-16.24.6-0.385.515.7-29.7-3.219.3-7.6-24.6-29.4-187.0-14.9-16.1-15.8-1.1-14.609-78.9037.64332.944.2616.67111.894
us-gaap:OperatingExpenses ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▃▂▂▂▂▂█▃▂▂▂▂▃▂▂▂▂▂61.459.754.461.660.265.858.859.964.064.160.660.263.061.031.161.688.165.065.768.474.772.7241.4101.169.565.667.33468.59977.97271.89572.96966.16572.49872.469
us-gaap:OperatingIncomeLoss ▇▇█▇▆▆▇▇▇▇▇▇▇▇▇▇▆▇▇▇▆▆▁▆▆▆▆▆▅▇██▇▇22.318.337.613.6-12.4-9.630.833.612.44.433.729.610.24.333.420.9-16.42.628.326.5-1.8-5.9-198.0-12.4-12.9-11.8-3.67-16.406-44.18711.16241.15551.82128.7322.094
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax █▁0.9-3.6NA9.23.4-7.5NA-4.9-2.54.0NA-7.7-7.64.9NA4.95.414.7NA27.2-4.013.9NA-17.0NA-51.4NA-34.541-9.239-1.65NA23.3589.222-19.139
us-gaap:OtherComprehensiveIncomeLossNetOfTax NANANA10.4NANANA-5.7-2.74.8NA-7.8-9.55.2NA5.36.716.7NA27.1-5.915.5NA-18.48.4-52.0NA-34.242-9.099-1.765NANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome█▁1.3-5.2NA10.44.3-8.7NA-5.7-2.74.8NA-7.8-9.55.2NA5.36.716.7NA27.1-5.915.5NA-18.48.4-52.0NA-34.242-9.099-1.765NANANANA
us-gaap:OtherNonoperatingIncomeExpense ▅▅▂▃▂▇▃▅▄▃▄▄▄▄█▄▂▁▇▄▇▃▃▁▄▆▇▇▄▃▄▂▃▆0.60.9-1.3-1.0-1.92.7-0.50.60.5-1.0-0.2-0.3-0.30.13.30.0-1.5-2.32.40.02.2-0.5-1.0-2.20.21.92.462.2850.201-0.347-0.051-1.383-0.8251.958
us-gaap:ResearchAndDevelopmentExpense ▄▃▃▃▃▄▃▃▄▄▄▄▄▄▁▄▄▄▄▃▄▄█▇▃▂▃▃▃▂▂▂▃▂24.623.322.721.922.625.723.723.425.024.725.225.225.424.816.623.926.726.225.323.325.826.136.833.022.719.621.03221.04721.70119.2220.64519.79621.24320.916
us-gaap:Revenues ▃▃▅▃▁▁▄▄▃▂▄▄▂▂▃▃▁▂▄▅▂▂▇▇▄▄▆▇▆▆█▇▇▆199.8201.0243.2205.8152.2163.1233.9235.9205.2179.8223.8236.2188.4178.5215.5196.0164.4168.3240.6243.1190.3185.3310.5294.6240.9238.6286.1300.836281.033273.384330.4311.641296.709276.119
us-gaap:SellingGeneralAndAdministrativeExpense ▅▅▄▄▄▅▄▄▅▅▄▄▅▄▁▅▅▅▅▆▆▆██▆▆▆▆▇▇▇▆▆▇36.736.232.232.031.136.234.634.638.937.635.134.537.135.812.736.838.738.139.443.045.243.156.759.246.545.745.61846.46251.98852.67551.83845.32345.77951.553
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:Assets ▃▃▂▃▃▃▂▂▂▂▁▂▁▁▁▁▁▁▁▂▂▂▃▆▅▅▆▆▇▇█1681.91675.31654.91667.71687.71696.81654.61607.51585.81575.01547.91565.11552.71546.31549.81553.91516.51530.31515.11581.81627.71636.81697.71980.81893.91894.31998.52011.532072.9882082.342170.116NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▃▃▂▃▃▃▂▂▂▂▁▂▁▁▁▁▁▁▁▂▂▂▃▆▅▅▆▆▇▇█1681.91675.31654.91667.71687.71696.81654.61607.51585.81575.01547.91565.11552.71546.31549.81553.91516.51530.31515.11581.81627.71636.81697.71980.81893.91894.31998.52011.532072.9882082.342170.116NANANA
us-gaap:StockholdersEquity ▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▃▂▂▃▃▄▄█1332.11323.71303.51264.61243.81253.81288.51257.31227.21216.51211.61124.91142.61140.81132.11036.91009.91027.41008.51026.71002.6997.51006.81200.31166.91171.01236.21271.3821318.7061404.3751887.127NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AssetsCurrent ▄▆▅▆▆▆▄▄▃▂▃▄▃▃▄▃▂▁▂▂▁▁▅▇▅▆▇▆▅▅█385.0450.6419.6434.9443.0443.0388.4394.3362.9344.9365.0383.3364.8356.2394.9371.1334.8324.3330.1348.9324.0313.9419.3471.6434.0438.1474.0435.158431.735422.242501.823NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄█▇▆▇▇▄▃▃▂▄▃▃▃▅▃▃▃▃▃▃▂▃▃▂▂▃▂▂▃▅▄▁▁94.2181.6147.8139.1168.3147.878.469.753.641.373.568.650.862.7111.757.748.663.366.260.047.244.263.357.937.038.655.234.29544.6151.379105.58888.5912.8219.248
us-gaap:AccountsReceivableNetCurrent ▂▂▃▂▁▂▄▄▃▃▃▃▂▂▃▄▂▃▃▄▂▂▆▇▆▆█▇▆▆▇116.8114.7131.4125.2101.6120.6159.6162.4135.8130.5140.3148.4130.1125.6137.7152.4129.7131.7145.1150.9123.2127.0192.4220.5199.6207.4236.3216.893207.287188.504224.556NANANA
us-gaap:InventoryNet ▇▅▃▇▇▇▅▆▇▇▄▆▇▅▃▅▅▂▁▃▄▃▆███▇▇▆▆▅162.4142.3130.1160.1162.5161.2141.8151.2159.7159.3140.1154.1160.6144.0125.6148.3142.7117.5108.2125.9139.0127.2152.0172.0170.9170.1162.0161.237155.858154.186149.168NANANA
us-gaap:InventoryFinishedGoods ▄▂▁▂▂▂▂▃▄▄▃▄▆▄▂▄▅▃▂▄▆▄▇██▆▆▆▆▆▆74.655.748.460.958.059.753.562.272.573.565.377.388.176.160.877.982.968.160.973.488.375.698.2109.5107.795.492.292.85195.77393.9792.048NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▂▃▂▂▂▃▁▂▃▃▂▃██▆▃▃▂▂▃▄▄▂▄▄▂▂▄▄▄▂11.612.010.310.510.613.48.611.013.813.811.112.223.323.919.912.713.811.810.612.114.615.511.614.716.210.710.716.11415.9415.57611.803NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NoncurrentAssets NANA214.8NANANA240.1NANANA211.7NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:USNANA69.8NANANA78.5NANANA49.8NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical kn:OtherAmericasNANA1.2NANANA1.2NANANA0.1NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical srt:AsiaNANA140.5NANANA157.9NANANA160.9NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical srt:EuropeNANA3.3NANANA2.5NANANA0.9NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross ▅▄▅▄▃▃▄▃▃▃▃▂▂▂▁▃▃▃▂▃▃▃▆██▇▇█▇▇▇695.3674.9682.7657.9641.4641.3645.3632.5631.5628.3609.7593.8596.0592.5552.0643.4628.4613.1586.3622.1618.9619.8736.3801.5812.2781.9782.3797.664769.542781.87776.439NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▇▇▆▅▅▄▄▃▃▂▂▂▂▁▅▄▃▃▄▃▃███▆▆▆▄▄▃505.1491.3491.2469.3448.6442.9438.8425.0419.6412.2398.0392.5390.9389.1369.0449.6436.9418.1400.1422.4410.3407.4511.5508.1505.0478.6466.4476.48433.872430.958415.442NANANA
us-gaap:AmortizationOfIntangibleAssets █▁3.93.3NA3.33.23.3NA1.81.71.8NA1.71.61.6NA1.72.33.0NA5.65.65.6NA11.19.910.0NA10.63310.82610.711NA11.47412.27111.713
us-gaap:PropertyPlantAndEquipmentNet ▁▁▁▁▁▂▂▂▂▂▂▂▂▂▁▁▁▁▁▂▂▂▃▅▆▆▆▆▇██190.2183.6191.5188.6192.8198.4206.5207.5211.9216.1211.7201.3205.1203.4183.0193.8191.5195.0186.2199.7208.6212.4224.8293.4307.2303.3315.9321.184335.67350.912360.997NANANA
us-gaap:Goodwill ▆▃▃▃▃▃▃▂▂▂▂▂▂▂▁▃▃▃▂▄▄▅▅▅▂▁▄▅▇██941.4910.0910.0909.9909.9909.9909.9891.1891.1891.1887.9887.9887.9887.8884.9907.7907.8906.1894.6917.1913.3933.9925.8934.1886.9880.0914.7932.384958.151964.345961.916NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill ▄▄▄▄▄▄▄35.735.735.735.735.735.735.7NANANA32.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▆▆▆▇▇███106.075.478.781.985.288.491.754.856.658.356.758.360.061.653.557.559.277.777.480.385.991.497.0255.8241.7248.9270.3286.827305.498312.508318.31NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA17.9NANANA13.5NANANA13.1NANANA22.4NANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▅▅▅▇▇▇▇██▁22.821.523.324.631.332.633.635.638.139.30.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▆▅▄▃▂▂▂▂▂▂▂▅▅▆▄▁▁▂▂▅▄▃▄▂▂▂▁▆█▅▃36.534.231.827.825.524.524.524.225.225.326.634.134.735.431.823.822.526.425.933.429.527.930.825.924.124.023.635.97741.93432.33327.07NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AccountsPayableCurrent ▁▂▁▁▂▂▂▂▁▁▂▂▃▂▂▂▂▁▁▂▂▂▄▆▇▇██▇▅▆72.781.070.368.975.079.587.773.965.271.777.282.789.986.785.675.379.072.471.873.274.879.5116.5142.3151.6157.3172.1168.374155.096129.127143.812NANANA
us-gaap:AccruedIncomeTaxesCurrent NA2.22.78.55.85.75.95.84.63.64.34.61.23.86.64.75.47.86.85.41.90.41.53.014.315.114.013.17318.44612.1550.0NANANA
us-gaap:LiabilitiesCurrent ███▁▅▁▂▁▁▁▂▂▂▁▂▂▂▂▂▂▁▃▅▆▆▆▇▇▇▄▄301.8302.2297.3138.0231.8132.9151.5139.3127.5127.4141.8147.5142.4139.2151.6155.4156.8147.6149.0141.3139.8169.9226.9245.2261.6263.4288.6268.103267.948197.592209.975NANANA
us-gaap:LongTermDebtCurrent █▅▁169.5167.3165.1NA100.00.00.00.00.00.00.00.00.00.00.013.313.313.29.76.12.629.530.026.322.518.815.0NANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent █▇▇▇▇▇▇▇▇▇▁11.110.010.210.09.89.59.39.29.18.90.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA18.6NANANA16.5NANANA20.1NANANA28.2NANANA26.0NANANA41.6NANANA48.8NANANA25.2NANANA
us-gaap:OtherLiabilitiesCurrent ▁▂▁▃▂▁▁▂▂▂▂▃▂▃▄▄▄▄▃▃▄▅▅▆▇▇█▅█▂▃18.319.218.623.819.716.916.519.919.720.320.125.321.325.628.231.829.630.226.025.332.436.035.939.142.344.148.836.3947.85523.33525.245NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:LongTermDebt ▁▁▁▂▃▃▁▁▁▁▁▂▂▂▂▄▄▄▄▅▆▆▇█▆▆▆▆▆▆169.5167.3165.1213.0260.9258.8156.8154.8171.9170.0158.1187.9196.1194.3192.6311.2298.1299.8298.2351.6394.8401.2428.8474.8398.5396.3400.0400.0400.0400.0NANANANA
us-gaap:LongTermDebtNoncurrent NANANA213.0160.9258.8156.8154.8171.9170.0158.1187.9196.1194.3192.6297.9284.8286.6288.5345.5392.2371.7400.0448.5376.0377.5385.0388.75392.5396.250.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▅▅▅▁███2.02.02.01.72.22.22.2NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation us-gaap:ForeignPlanNANA8.8NANANA6.7NANANA6.9NANANA6.5NANANA8.6NANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▁▂▂▁▁▁▁▁▁▁▂█▅▅▅▂▂▃▂▂▃▃▃▃▃▂▂▂▁▂▁27.930.532.829.326.024.529.926.927.728.934.3104.669.769.767.941.440.843.041.440.341.842.145.650.249.838.239.530.24430.09935.00827.123NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▅▅▅▆▆▇▇▇██▁18.116.618.720.522.424.025.127.129.430.10.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA8.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA6.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA2.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA0.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:StockholdersEquity ▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▃▂▂▃▃▄▄█1332.11323.71303.51264.61243.81253.81288.51257.31227.21216.51211.61124.91142.61140.81132.11036.91009.91027.41008.51026.71002.6997.51006.81200.31166.91171.01236.21271.3821318.7061404.3751887.127NANANA
us-gaap:CommonStockValue ██████████████████████████████▁0.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.850.850.850.0NANANA
us-gaap:AdditionalPaidInCapital ███████████████████▇▇▇▇▇▇▇▇▇▇▇▁1610.21600.71587.81582.81578.01572.81574.71566.61556.21548.71545.91539.91533.61526.91523.11516.81510.81505.31499.81494.71490.11454.51449.91445.51378.81375.21372.61369.5151367.9871365.6560.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▅▅▅▄▄▅▅▄▄▄▄▃▃▃▃▁▁▂▂▁▁▂▂▆▆▆▆▆▇██-138.4-156.0-168.5-198.1-203.7-184.2-175.1-195.6-221.0-226.9-224.2-303.8-287.6-292.2-291.9-377.4-393.1-363.4-360.1-379.4-371.8-347.2-317.8-130.8-115.9-99.8-84.0-82.863-68.25310.6480.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▂▂▂▂▁▂▂▂▂▂▂▂▃▂▂▂▂▁▃▂▂▁▂▂▂▄▆▇██▇▆▆-104.4-105.7-100.5-106.0-116.4-120.7-112.0-114.6-108.9-106.2-111.0-112.1-104.3-94.8-100.0-103.4-108.7-115.4-132.1-89.5-116.6-110.7-126.2-115.3-96.9-105.3-53.3-16.1218.12227.22136.52517.462-6.323-15.516
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedDefinedBenefitPlansAdjustment▁▁▁▃▃▃▃▄▄▄▄▄▄▄▄▄▄▄▄▆▆▆▆▆▆▆▆███████-21.5-21.9-22.1-18.2-18.5-18.8-18.7-15.1-15.2-15.4-15.5-14.9-15.0-15.2-15.3-16.6-16.6-16.6-16.6-11.5-11.5-11.5-11.5-11.5-11.5-11.6-11.7-7.865-8.164-8.304-7.854-7.606-7.923-8.019
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges▅▅█▇▆▅▆▄▆▆▅▃▄▇▆▆▆▄▁▃▃▆▃▂▄▄▅-0.2-0.21.60.90.0-0.60.5-1.0-0.10.3-0.4-1.6-1.40.70.50.50.1-1.2-3.2-2.0-1.90.0-1.6-2.3-0.9-0.9-0.2NANANA0.0-0.157-0.267-0.142
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▃▁▂▁▂▂▂▄▆▇██▇▆▆-82.7-83.6-80.0-88.7-97.9-101.3-93.8-98.5-93.6-91.1-95.1-95.6-87.9-80.3-85.2-87.3-92.2-97.6-112.3-76.0-103.2-99.2-113.1-101.5-84.5-92.8-41.4-8.25526.28635.52544.37925.2251.867-7.355
us-gaap:TreasuryStockValue █▄▄▄▄▄▁36.216.216.215.015.015.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▅█▄▄▃▃▄▄▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▃▂▂▂▂▁7.411.14.94.84.13.56.05.27.36.76.26.57.37.06.56.26.36.15.15.25.85.44.95.03.63.03.0682.3162.1881.128NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁█21.339.7NA27.626.5-1.5NA39.722.1-11.2NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁█▇███▃██▆▇-90.3-7.0-14.8-5.7-6.8-7.8-66.5-8.1-9.4-26.5-22.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▁▁▄█▄▃▄▄▂-18.51.2-52.1-51.40.778.91.8-15.3-0.35.3-32.3NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁▆▅▄▆█▅▆-87.433.88.7-29.220.569.48.716.1NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType kn:ConvertibleNotesDueTwentyTwentyOne,us-gaap:ConvertibleDebt▄█▄▄█▄█▄▄▄█▄▄▄▄█▄▄▄█▁0.20.30.20.20.30.20.30.20.20.20.30.20.20.20.20.30.20.20.20.30.1NANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▂▁▁▂▂▂▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▃▅▆▅▅▅█▆▅▅▅▅▅15.715.114.915.215.215.314.013.413.713.312.713.113.113.512.914.514.615.315.918.417.721.734.735.433.132.533.06847.0738.08333.37932.52833.3633.87531.137
us-gaap:IncreaseDecreaseInAccountsPayable ▃▆▄▃▄▃▆▆▄▄▄▃▆▃▆▃▅▄▅▄▂▂▂▃▄▃▆█▆▃▄▆▄▁-8.010.8-0.3-6.3-4.6-6.312.48.8-5.6-3.5-4.6-7.011.6-6.39.3-7.35.7-2.85.2-2.7-14.3-14.8-19.7-9.1-4.5-9.410.83826.52210.395-9.755-1.0239.99-0.911-24.156
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▄▆▇▄▂▅█▆▄▅▇▆▄▅▇▅▄▅▇▅▁▃▇▄▃█▇▇▂▅█▆▃-0.8999999999999981-16.65.623.5-19.3-38.8-3.126.65.5-11.2-8.218.93.7-14.1-6.521.2-2.2-14.9-5.823.4-3.4-50.1-27.218.4-11.2-25.227.012.70719.12-34.527-1.88829.4692.006-23.087
us-gaap:IncreaseDecreaseInInventories ▇▇▁▄▅█▄▄▅▇▃▅▇▇▅▅█▆▃▃▆▆▃▅▅▆▅▆▅▆▅▆▅▆17.112.9-33.0-5.80.022.1-10.8-6.61.416.3-14.0-4.219.114.8-1.83.524.28.1-13.9-16.23.94.3-18.6-4.21.010.12.5035.9933.6656.039-1.2376.1021.168.075
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet NANANA-0.7-1.31.7NA2.00.7-1.8NA2.12.1-1.8NA-2.3-2.0-1.2NA0.8-2.8-1.6NA3.7-0.30.7NA0.8291.464-2.392NA4.566-4.2338.797
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁█21.339.7NA27.626.5-1.5NA39.722.1-11.2NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▆▇▆▅▆▆▆▆▆█▅▆▆█▆▅▆▆▆▅▅▁▅▅▅▆▅▄▆▇▇▆▆17.612.529.65.6-19.5-9.120.525.45.9-2.779.6-16.24.6-0.385.515.7-29.7-3.219.3-7.6-24.6-29.4-187.0-14.9-16.1-15.8-1.1-14.609-78.9037.64332.944.2616.67111.894
us-gaap:ShareBasedCompensation ▆█▄▄▃▃▅▄▆▅▅▅▆▅▅▅▅▅▄▄▅▄▄▄▃▃▂▂▂▂▁▁▁▁7.411.14.94.84.13.56.05.27.36.76.26.57.37.06.56.26.36.15.15.25.85.44.95.03.63.02.5372.562.4171.4870.3230.5480.5640.565
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁█▇███▃██▆▇-90.3-7.0-14.8-5.7-6.8-7.8-66.5-8.1-9.4-26.5-22.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▃▁▁▂▂▂▂▄▆▂▆▆▂▃▃▄▂▂▂▂▄▂▅▄▄▇▄▆█▄▇▇10.85.211.55.86.87.88.68.19.415.122.110.024.523.58.212.013.717.77.710.810.49.814.69.821.017.715.86126.89517.24523.89931.44115.1629.24329.356
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▁▁▄█▄▃▄▄▂-18.51.2-52.1-51.40.778.91.8-15.3-0.35.3-32.3NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA1.20.00.015.0NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0850000.0850000.0850000.00
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value9494929191939290909089908988898888888585858585858585
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value9292919191919190909089898988888888888585858585858585
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value583650.01768400.04559100.06157100.05381000.02064100.04306600.05970800.05658300.06277300.06100500.04092300.04446300.04024600.05227400.05855400.04940400.03979000.03381700.02524300.01807000.01750300.0386820.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.190.140.320.06-0.21-0.10.220.280.06-0.030.88-0.180.0500.960.18-0.33-0.040.21-0.08-0.28-0.33-2.11-0.17-0.19-0.19-0.01-0.17-0.930.090.380.520.20.14
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.190.130.320.06-0.21-0.10.210.270.06-0.030.87-0.180.0500.940.17-0.33-0.040.22-0.08-0.28-0.33-2.11-0.17-0.19-0.19-0.01-0.17-0.930.090.380.520.20.14
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.190.140.320.06-0.21-0.140.230.280.06-0.030.88-0.20.0500.360.17-0.34-0.050.20.24-0.08-0.14-0.070.050.160.06
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.180.130.320.06-0.21-0.140.220.270.06-0.030.87-0.20.0500.350.17-0.34-0.050.190.24-0.08-0.14-0.070.050.160.06
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value7.4114.94.84.13.56.05.27.36.76.26.57.37.06.16.26.36.15.35.25.65.42.26.43.22.72.12.6
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.037142.9

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value187.33516-15.2-17.823193.22.180-24.0-4.94.98821-23.013-23.319-30.5-13.9-197.9-33.3-7.7-67.8-38.326-48.851-88.0025.878516825-7.387
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-697871.4-733350.053436.40.05830.82491.7-687.8

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value116123151130103105143142128110129146115113125121
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value116123151130103105143142128110129146115113125121
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value83789275475689937668948973658982716794947266438856536352338311411710194
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0745614.3281541.7755063.60.010110.29752.28804.7

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1712295.6-19.5-12.821255.9-2.779-17.84.4-0.43115-30.3-4.71720-6.8-12.5-6.64.8135.0
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperations us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Income
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value17125.6-19.5-12.825
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.0
Percentage of InterestIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.0

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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1815327.9-18.4-10.626309.3-0.129255.80.43115-23.0-4.92520-5.4-10.1-202.5-18.3-15.8-12.3-3.303-16.136-45.8061035381512
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-230514.3-381716.792209.10.03279.41525.61127.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.42.72.82.31.12.25.65.03.42.6-49.8431.40.85.40.47.3-0.27.90.01.42.4-15.5-3.40.33.5-2.171-1.527332.52.315-5.989-0.8350.21
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-21814.3275808.322727.30.0-513.2-80.419.6

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.94.57.31.32.85.42.23.02.54.47.73.43.13.84.3
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3.63.63.53.53.53.43.43.33.33.33.33.23.23.13.13.13.13.02.83.12.0
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating kn:ConvertibleNotesDueTwentyTwentyOne us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.20.43.10.93.70.43.20.53.30.53.61.33.70.44.01.54.31.54.62.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1712295.6-19.5-9.120255.9-2.779-16.24.6-0.38515-29.7-3.219-7.6-24.6-29.4-187.0-14.9-16.1-15.8-1.1-14.609-78.9037.64332441611
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1571.4-208700.0-657525.069481.84569.43792.61606.11107.4

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value17125.6-19.5-9.120255.9-2.779-16.24.6-0.38515-29.7-3.219-7.6-16.1-15.8-1.137-14.61-78.90110
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0103.4100.0100.0139.3
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1624.3-208714.3-657508.396800.0
Percentage of InterestIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6159546160655859646460606361316188656568747224110169656768777172667272
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.096191.4979985.7649766.7653590.910134.65669.76984.46747.6

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value22183713-12.4-9.63033124.43329104.33320-16.42.62826-1.8-5.9-198.0-12.4-12.9-11.8-3.67-16.406-44.1871141512822
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-5242.9-234371.4-368225.0101472.75716.04440.52767.82057.2

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0.9-3.69.23.4-7.5-4.9-2.54.0-7.7-7.64.94.95.41427-4.013-17.0-51.4-34.541-9.239-1.65239.222-19.139
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-493442.9-76991.7-15000.02001.5888.4-1782.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2020-09-302019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value10-5.7-2.74.8-7.8-9.55.25.36.71627-5.915-18.48.4-52.0-34.242-9.099-1.765
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-489171.4-75825.0-16045.5

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value1.3-5.2104.3-8.7-5.7-2.74.8-7.8-9.55.25.36.71627-5.915-18.48.4-52.0-34.242-9.099-1.765
Percentage of OtherComprehensiveIncomeLossNetOfTax0.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-489171.4-75825.0-16045.5
Percentage of InterestIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value600000.0900000.0-1300000.0-1000000.0-1900000.02700000.0-500000.0600000.0500000.0-1000000.0-200000.0-300000.0-300000.0100000.03300000.00-1500000.0-2300000.02400000.002200000.0-500000.0-1000000.0-2200000.0200000.01900000.02460000.02285000.0201000.0-347000.0-51000.0-1383000.0-825000.01958000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.03514.332642.91675.0-3154.5-7.1-118.5-79.5182.3

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value24232221222523232524252525241623262625232526363322192121211920192120
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.030045.7300671.4180841.7174727.32867.41696.32046.51947.5

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value199201243205152163233235205179223236188178215196164168240243190185310294240238286300281273330311296276
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0408714.34297657.12341941.72485309.145888.926704.528584.725709.4

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, kn:Audio


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value149163201164104120190193159139185199151146187167138144190193140137
Percentage of Revenues75.081.183.080.168.773.681.382.177.977.482.784.380.682.086.985.684.085.779.179.673.774.4
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating us-gaap:OperatingSegments kn:Audio0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, kn:PrecisionDevices


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value503741414743434245403837363228285249-53.3495047
Percentage of Revenues25.018.917.019.931.326.418.717.922.122.617.315.719.418.013.114.431.729.4-22.220.426.325.6
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating us-gaap:OperatingSegments kn:PrecisionDevices0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:StatementGeographical

country:US


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3531292828293332323232313229252725
Percentage of Revenues17.815.712.314.018.918.014.213.616.017.914.713.417.216.611.814.015.4
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating country:US0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

kn:OtherAmericas


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.11.20.91.30.90.61.71.91.61.11.00.80.90.91.31.31.0
Percentage of Revenues0.60.60.40.60.60.40.70.80.80.60.40.30.50.50.60.70.6
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating kn:OtherAmericas0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

kn:OtherGeographicalLocations


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.01.00.90.91.41.11.21.61.61.61.11.31.61.51.71.21.4
Percentage of Revenues0.50.50.40.40.90.70.50.70.80.90.50.60.80.80.80.60.9
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating kn:OtherGeographicalLocations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:Asia


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value140148191151106109171178144121165182131126168149
Percentage of Revenues70.373.778.773.770.267.373.475.570.267.473.877.370.070.678.376.2
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating srt:Asia0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:Europe


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21192023142226222523231921201816
Percentage of Revenues10.89.68.311.29.413.711.29.412.213.210.68.411.511.58.58.6
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestIncomeOperating srt:Europe0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value36363232313634343837353437351236383839434543565946454546515251454551
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.065168.6663742.9433233.3478863.67199.73883.74410.34800.1

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1681167516541667168716961654160715851575154715651552154615491553151615301515158116271636169719801893189419982011207220822170
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4.34.45.35.24.05.15.04.85.04.01.91.81213
Percentage of Assets0.30.30.30.30.20.30.30.30.30.30.10.10.80.9
Percentage of Assets0.30.30.30.30.20.30.30.30.30.30.10.10.80.9
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, kn:Audio


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value142814971470146614751502148714381418141014091435141814111430137013361349
Percentage of Assets84.989.488.988.087.488.589.989.589.489.591.091.791.391.392.388.288.289.0
Percentage of Assets84.989.488.988.087.488.589.989.589.489.591.091.791.391.392.388.288.289.0
Percentage of Assets us-gaap:OperatingSegments kn:Audio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, kn:PrecisionDevices


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value249173179195207189162164162160136127122120103180175162
Percentage of Assets14.810.410.811.712.311.29.810.210.310.28.88.17.97.86.711.611.610.8
Percentage of Assets14.810.410.811.712.311.29.810.210.310.28.88.17.97.86.711.611.610.8
Percentage of Assets us-gaap:OperatingSegments kn:PrecisionDevices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1681167516541667168716961654160715851575154715651552154615491553151615301515158116271636169719801893189419982011207220822170
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1332132313031264124312531288125712271216121111241142114011321036100910271008102610029971006120011661171123612711318140418871188286
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets79.279.078.875.873.773.977.978.277.477.278.371.973.673.873.066.766.667.166.664.961.660.959.360.661.661.861.963.263.667.487.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value-104.4-105.7-100.5-106.0-116.4-120.7-112.0-114.6-108.9-106.2-111.0-112.1-104.3-94.8-100.0-103.4-108.7-115.4-132.1-89.5-116.6-110.7-126.2-115.3-96.9-105.3-53.3-16.121827363.888
Percentage of StockholdersEquity-7.8-8.0-7.7-8.4-9.4-9.6-8.7-9.1-8.9-8.7-9.2-10.0-9.1-8.3-8.8-10.0-10.8-11.2-13.1-8.7-11.6-11.1-12.5-9.6-8.3-9.0-4.3-1.31.41.91.90.330.9
Percentage of Assets-6.2-6.3-6.1-6.4-6.9-7.1-6.8-7.1-6.9-6.7-7.2-7.2-6.7-6.1-6.5-6.7-7.2-7.5-8.7-5.7-7.2-6.8-7.4-5.8-5.1-5.6-2.7-0.80.91.31.70.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1610160015871582157815721574156615561548154515391533152615231516151015051499149414901454144914451378137513721369136713650.00.00.0
Percentage of StockholdersEquity120.9120.9121.8125.2126.9125.4122.2124.6126.8127.3127.6136.9134.2133.8134.5146.3149.6146.5148.7145.6148.6145.8144.0120.4118.2117.4111.0107.7103.797.20.00.00.0
Percentage of Assets95.795.595.994.993.592.795.297.598.198.399.998.498.898.798.397.699.698.499.094.591.588.985.473.072.872.668.768.166.065.60.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value0.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.850.850.850.00.00.0
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value-138.4-156.0-168.5-198.1-203.7-184.2-175.1-195.6-221.0-226.9-224.2-303.8-287.6-292.2-291.9-377.4-393.1-363.4-360.1-379.4-371.8-347.2-317.8-130.8-115.9-99.8-84.0-82.863-68.253100.00.00.0
Percentage of StockholdersEquity-10.4-11.8-12.9-15.7-16.4-14.7-13.6-15.6-18.0-18.7-18.5-27.0-25.2-25.6-25.8-36.4-38.9-35.4-35.7-37.0-37.1-34.8-31.6-10.9-9.9-8.5-6.8-6.5-5.20.80.00.00.0
Percentage of Assets-8.2-9.3-10.2-11.9-12.1-10.9-10.6-12.2-13.9-14.4-14.5-19.4-18.5-18.9-18.8-24.3-25.9-23.7-23.8-24.0-22.8-21.2-18.7-6.6-6.1-5.3-4.2-4.1-3.30.50.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-36.2-16.2-16.2-15.0-15.0-15.00.0
Percentage of StockholdersEquity-2.7-1.2-1.2-1.2-1.2-1.20.0
Percentage of Assets-2.2-1.0-1.0-0.9-0.9-0.90.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value385450419434443443388394362344365383364356394371334324330348324313419471434438474435431422501
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.926.925.426.126.226.123.524.522.921.923.624.523.523.025.523.922.121.221.822.119.919.224.723.822.923.123.721.620.820.323.1

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value94181147139168147786953417368506211157486366604744635737385534445110588129.2481026
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.610.88.98.310.08.74.74.33.42.64.74.43.34.17.23.73.24.14.43.82.92.73.72.92.02.02.81.72.22.54.90.00.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value116114131125101120159162135130140148130125137152129131145150123127192220199207236216207188224
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.96.87.97.56.07.19.610.18.68.39.19.58.48.18.99.88.68.69.69.57.67.811.311.110.510.911.810.810.09.110.3

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value162142130160162161141151159159140154160144125148142117108125139127152172170170162161155154149
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.78.57.99.69.69.58.69.410.110.19.19.810.39.38.19.59.47.77.18.08.57.89.08.79.09.08.18.07.57.46.9

Inventory Finished Goods

us-gaap:InventoryFinishedGoods

us-gaap:InventoryFinishedGoods


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7455486058595362727365778876607782686073887598109107959292959392
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.43.32.93.73.43.53.23.94.64.74.24.95.74.93.95.05.54.54.04.65.44.65.85.55.75.04.64.64.64.54.2

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1112101010138.6111313111223231912131110121415111416101016151511
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.60.60.60.80.50.70.90.90.70.81.51.51.30.80.90.80.70.80.90.90.70.70.90.60.50.80.80.70.5

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value214240211
Percentage of NoncurrentAssets100.0100.0100.0
Percentage of Assets13.014.513.7

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:US


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value697849
Percentage of NoncurrentAssets32.532.723.5
Percentage of Assets4.24.73.2
Percentage of Assets country:US0.00.00.0

kn:OtherAmericas


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value1.21.20.1
Percentage of NoncurrentAssets0.60.50.0
Percentage of Assets0.10.10.0
Percentage of Assets kn:OtherAmericas0.00.00.0

srt:Asia


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value140157160
Percentage of NoncurrentAssets65.465.876.0
Percentage of Assets8.59.510.4
Percentage of Assets srt:Asia0.00.00.0

srt:Europe


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value3.32.50.9
Percentage of NoncurrentAssets1.51.00.4
Percentage of Assets0.20.20.1
Percentage of Assets srt:Europe0.00.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value695674682657641641645632631628609593596592552643628613586622618619736801812781782797769781776
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.340.341.339.438.037.839.039.339.839.939.437.938.438.335.641.441.440.138.739.338.037.943.440.542.941.339.139.737.137.535.8

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value11811611110910210310410310410310210110310510312112011611211811812011813013111311210510410385
Percentage of PropertyPlantAndEquipmentGross17.017.216.416.616.016.116.216.316.516.516.817.017.317.718.718.919.219.019.219.119.219.416.116.316.114.514.413.213.613.211.1
Percentage of Assets7.06.96.86.66.16.16.36.46.66.66.66.56.66.86.77.88.07.67.47.57.37.37.06.66.96.05.65.25.05.04.0
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Equipment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value563550562540530530533521519516499485485480441512498487464494488488606659669657657679652666678
Percentage of PropertyPlantAndEquipmentGross81.181.682.482.282.882.782.682.582.382.382.081.781.581.079.979.679.379.579.379.479.078.882.382.282.484.084.185.284.885.287.4
Percentage of Assets33.532.934.032.431.531.332.232.532.832.832.331.031.331.028.533.032.931.930.731.230.029.835.733.335.334.732.933.831.532.031.3
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value137.98.07.97.87.77.77.67.67.57.57.47.47.57.79.19.29.29.29.51111111111111112121212
Percentage of PropertyPlantAndEquipmentGross1.91.21.21.21.21.21.21.21.21.21.21.21.21.31.41.41.51.51.61.51.81.81.51.41.51.51.51.51.61.61.6
Percentage of Assets0.80.50.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.70.70.70.60.60.60.60.60.60.60.6
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value505491491469448442438425419412398392390389369449436418400422410407511508505478466476433430415
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.029.329.728.126.626.126.526.426.526.225.725.125.225.223.828.928.827.326.426.725.224.930.125.726.725.323.323.720.920.719.1

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value3.93.33.33.23.31.81.71.81.71.61.61.72.33.05.65.65.6119.910.0101010111211
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value190183191188192198206207211216211201205203183193191195186199208212224293307303315321335350360
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.311.011.611.311.411.712.512.913.413.713.712.913.213.211.812.512.612.712.312.612.813.013.214.816.216.015.816.016.216.916.6

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value941910910909909909909891891891887887887887884907907906894917913933925934886880914932958964961946
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets56.054.355.054.653.953.655.055.456.256.657.456.757.257.457.158.459.959.259.058.056.157.154.547.246.846.545.846.446.246.344.30.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

kn:IntegratedMicrowaveCorporation


Goodwillus-gaap:
Period End2021-05-03
Value31
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets kn:IntegratedMicrowaveCorporation0.0

us-gaap:Goodwill us-gaap:ReportingUnit

kn:Capacitors


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-31
Value313128
Percentage of Goodwill3.43.43.2
Percentage of Assets1.91.91.8
Percentage of Assets kn:Capacitors0.00.00.0

kn:MobileConsumerElectronics


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-31
Value741740722
Percentage of Goodwill81.481.481.3
Percentage of Assets44.844.846.7
Percentage of Assets kn:MobileConsumerElectronics0.00.00.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

kn:Audio


Goodwillus-gaap:
Period End2021-06-302020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value878878878859859859859859859859859722722720708859
Percentage of Goodwill93.496.696.696.596.596.596.896.896.896.997.279.579.579.579.292.8
Percentage of Assets52.353.153.153.554.254.655.654.955.455.655.546.547.647.146.850.6
Percentage of Assets kn:Audio0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

kn:PrecisionDevices


Goodwillus-gaap:
Period End2021-06-302020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value623131313131282828272518518518518525
Percentage of Goodwill6.63.43.43.53.53.53.23.23.23.12.820.520.520.520.82.7
Percentage of Assets3.71.91.91.92.02.01.81.81.81.81.612.012.312.112.31.5
Percentage of Assets kn:PrecisionDevices0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3535353535353532
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.12.22.12.12.12.22.1

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:InProcessResearchAndDevelopment


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3.73.73.73.73.73.73.70.0
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill10.410.410.410.410.410.410.40.0
Percentage of Assets0.20.20.20.20.20.20.20.0
Percentage of Assets us-gaap:InProcessResearchAndDevelopment0.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value10675788185889154565856586061535759777780859197255241248270286305312318
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.34.54.84.95.05.25.53.43.63.73.73.73.94.03.53.73.95.15.15.15.35.65.712.912.813.113.514.314.715.014.7

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value17131322
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0
Percentage of Assets1.10.80.81.4

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value222123243132333538390.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.41.31.41.51.91.92.02.22.42.50.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value36343127252424242525263434353123222625332927302524242335413227
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.01.91.71.51.41.51.51.61.61.72.22.22.32.11.51.51.71.72.11.81.71.81.31.31.31.21.82.01.61.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value72817068757987736571778289868575797271737479116142151157172168155129143
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.84.24.14.44.75.34.64.14.65.05.35.85.65.54.85.24.74.74.64.64.96.97.28.08.38.68.47.56.26.6

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.22.78.55.85.75.95.84.63.64.34.61.23.86.64.75.47.86.85.41.90.41.53.01415141318120.0
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.20.50.30.30.40.40.30.20.30.30.10.20.40.30.40.50.40.30.10.00.10.20.80.80.70.70.90.60.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value301302297138231132151139127127141147142139151155156147149141139169226245261263288268267197209
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.918.018.08.313.77.89.28.78.08.19.29.49.29.09.810.010.39.69.88.98.610.413.412.413.813.914.413.312.99.59.7

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1691671651000.00.00.00.00.00.00.00.00.00.01313139.76.12.6293026221815
Percentage of LongTermDebtCurrent100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.110.010.05.90.00.00.00.00.00.00.00.00.00.00.90.90.90.60.40.21.81.81.31.21.00.8

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1110.01010.09.89.59.39.29.18.90.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.70.60.60.60.60.60.60.60.60.60.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1816202826414825
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.01.31.81.72.52.41.2

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value18191823191616191920202521252831293026253236353942444836472325
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.11.41.21.01.01.21.21.31.31.61.41.71.82.02.02.01.71.62.02.22.12.02.22.32.41.82.31.11.2

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
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
Value169167165213260258156154171170158187196194192311298299298351394401428474398396400400400400
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.110.010.012.815.515.39.59.610.810.810.212.012.612.612.420.019.719.619.722.224.324.525.324.021.020.920.019.919.319.2

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2131602581561541711701581871961941922972842862883453923714004483763773853883923960.0
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets12.89.515.39.59.610.810.810.212.012.612.612.419.218.818.719.021.824.122.723.622.619.919.919.319.318.919.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2000000.02000000.02000000.01700000.02200000.02200000.02200000.0
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:ForeignPlan


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8.86.76.96.58.6
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.40.40.6
Percentage of Assets us-gaap:ForeignPlan0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value273032292624292627283410469696741404341404142455049383930303527
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.82.01.81.51.41.81.71.71.82.26.74.54.54.42.72.72.82.72.52.62.62.72.52.62.02.01.51.51.71.2

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value181618202224252729300.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.11.01.11.21.31.41.51.71.91.90.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value8500000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value6800000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value2400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value1100000.0
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
Value900000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-31
Value28
Percentage of OperatingLeaseLiability100.0
Percentage of Assets1.7

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value30
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets1.9

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue us-gaap:PropertySubjectToOrAvailableForOperatingLease

us-gaap:PropertySubjectToOperatingLease


Lessee
Period End2021-03-31
Value5.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue0.0
Percentage of Assets0.3
Percentage of Assets us-gaap:PropertySubjectToOperatingLease0.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value2000000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1332132313031264124312531288125712271216121111241142114011321036100910271008102610029971006120011661171123612711318140418871188286
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets79.279.078.875.873.773.977.978.277.477.278.371.973.673.873.066.766.667.166.664.961.660.959.360.661.661.861.963.263.667.487.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value-104.4-105.7-100.5-106.0-116.4-120.7-112.0-114.6-108.9-106.2-111.0-112.1-104.3-94.8-100.0-103.4-108.7-115.4-132.1-89.5-116.6-110.7-126.2-115.3-96.9-105.3-53.3-16.121827363.888
Percentage of StockholdersEquity-7.8-8.0-7.7-8.4-9.4-9.6-8.7-9.1-8.9-8.7-9.2-10.0-9.1-8.3-8.8-10.0-10.8-11.2-13.1-8.7-11.6-11.1-12.5-9.6-8.3-9.0-4.3-1.31.41.91.90.330.9
Percentage of Assets-6.2-6.3-6.1-6.4-6.9-7.1-6.8-7.1-6.9-6.7-7.2-7.2-6.7-6.1-6.5-6.7-7.2-7.5-8.7-5.7-7.2-6.8-7.4-5.8-5.1-5.6-2.7-0.80.91.31.70.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1610160015871582157815721574156615561548154515391533152615231516151015051499149414901454144914451378137513721369136713650.00.00.0
Percentage of StockholdersEquity120.9120.9121.8125.2126.9125.4122.2124.6126.8127.3127.6136.9134.2133.8134.5146.3149.6146.5148.7145.6148.6145.8144.0120.4118.2117.4111.0107.7103.797.20.00.00.0
Percentage of Assets95.795.595.994.993.592.795.297.598.198.399.998.498.898.798.397.699.698.499.094.591.588.985.473.072.872.668.768.166.065.60.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value0.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.90.850.850.850.00.00.0
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value-138.4-156.0-168.5-198.1-203.7-184.2-175.1-195.6-221.0-226.9-224.2-303.8-287.6-292.2-291.9-377.4-393.1-363.4-360.1-379.4-371.8-347.2-317.8-130.8-115.9-99.8-84.0-82.863-68.253100.00.00.0
Percentage of StockholdersEquity-10.4-11.8-12.9-15.7-16.4-14.7-13.6-15.6-18.0-18.7-18.5-27.0-25.2-25.6-25.8-36.4-38.9-35.4-35.7-37.0-37.1-34.8-31.6-10.9-9.9-8.5-6.8-6.5-5.20.80.00.00.0
Percentage of Assets-8.2-9.3-10.2-11.9-12.1-10.9-10.6-12.2-13.9-14.4-14.5-19.4-18.5-18.9-18.8-24.3-25.9-23.7-23.8-24.0-22.8-21.2-18.7-6.6-6.1-5.3-4.2-4.1-3.30.50.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-36.2-16.2-16.2-15.0-15.0-15.00.0
Percentage of StockholdersEquity-2.7-1.2-1.2-1.2-1.2-1.20.0
Percentage of Assets-2.2-1.0-1.0-0.9-0.9-0.90.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0900000.0850000.0850000.0850000.00
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1610160015871582157815721574156615561548154515391533152615231516151015051499149414901454144914451378137513721369136713650.0
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets95.795.595.994.993.592.795.297.598.198.399.998.498.898.798.397.699.698.499.094.591.588.985.473.072.872.668.768.166.065.60.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-138.4-156.0-168.5-198.1-203.7-184.2-175.1-195.6-221.0-226.9-224.2-303.8-287.6-292.2-291.9-377.4-393.1-363.4-360.1-379.4-371.8-347.2-317.8-130.8-115.9-99.8-84.0-82.863-68.253100.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-8.2-9.3-10.2-11.9-12.1-10.9-10.6-12.2-13.9-14.4-14.5-19.4-18.5-18.9-18.8-24.3-25.9-23.7-23.8-24.0-22.8-21.2-18.7-6.6-6.1-5.3-4.2-4.1-3.30.50.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-104.4-105.7-100.5-106.0-116.4-120.7-112.0-114.6-108.9-106.2-111.0-112.1-104.3-94.8-100.0-103.4-108.7-115.4-132.1-89.5-116.6-110.7-126.2-115.3-96.9-105.3-53.3-16.1218273617-6.323-15.5163.765
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-6.2-6.3-6.1-6.4-6.9-7.1-6.8-7.1-6.9-6.7-7.2-7.2-6.7-6.1-6.5-6.7-7.2-7.5-8.7-5.7-7.2-6.8-7.4-5.8-5.1-5.6-2.7-0.80.91.31.70.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-21.5-21.9-22.1-18.2-18.5-18.8-18.7-15.1-15.2-15.4-15.5-14.9-15.0-15.2-15.3-16.6-16.6-16.6-16.6-11.5-11.5-11.5-11.5-11.5-11.5-11.6-11.7-7.865-8.164-8.304-7.854-7.606-7.923-8.019-8.019
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax20.620.722.017.215.915.616.713.214.014.514.013.314.416.015.316.115.314.412.612.89.910.49.110.011.911.022.048.8-45.1-30.5-21.5-43.6125.351.7-213.0
Percentage of Assets-1.3-1.3-1.3-1.1-1.1-1.1-1.1-0.9-1.0-1.0-1.0-1.0-1.0-1.0-1.0-1.1-1.1-1.1-1.1-0.7-0.7-0.7-0.7-0.6-0.6-0.6-0.6-0.4-0.4-0.4-0.40.00.00.00.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-0.2-0.21.60.90.0-0.60.5-1.0-0.10.3-0.4-1.6-1.40.70.50.50.1-1.2-3.2-2.0-1.90.0-1.6-2.3-0.9-0.9-0.20.0-0.157-0.267-0.1420.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.20.2-1.6-0.8-0.00.5-0.40.90.1-0.30.41.41.3-0.7-0.5-0.5-0.11.02.42.21.6-0.01.32.00.90.90.40.0-0.94.20.90.0
Percentage of Assets-0.0-0.00.10.10.0-0.00.0-0.1-0.00.0-0.0-0.1-0.10.00.00.00.0-0.1-0.2-0.1-0.10.0-0.1-0.1-0.0-0.0-0.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-82.7-83.6-80.0-88.7-97.9-101.3-93.8-98.5-93.6-91.1-95.1-95.6-87.9-80.3-85.2-87.3-92.2-97.6-112.3-76.0-103.2-99.2-113.1-101.5-84.5-92.8-41.4-8.255263544251.867-7.35511
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax79.279.179.683.784.183.983.886.086.085.885.785.384.384.785.284.484.884.685.084.988.589.689.688.087.288.177.751.2145.1130.5121.5144.5-29.547.4313.0
Percentage of Assets-4.9-5.0-4.8-5.3-5.8-6.0-5.7-6.1-5.9-5.8-6.1-6.1-5.7-5.2-5.5-5.6-6.1-6.4-7.4-4.8-6.3-6.1-6.7-5.1-4.5-4.9-2.1-0.41.31.72.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3616161515150.0
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.21.01.00.90.90.90.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value7.4114.94.84.13.56.05.27.36.76.26.57.37.06.56.26.36.15.15.25.85.44.95.03.63.03.0682.3162.1881.128
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value7.4114.94.84.13.56.05.27.36.76.26.57.37.06.56.26.36.15.15.25.85.44.95.03.63.03.0682.3162.1881.128
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value21392726-1.53922-11.2
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-90.3-7.0-14.8-5.7-6.8-7.8-66.5-8.1-9.4-26.5-22.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-18.51.2-52.1-51.40.7781.8-15.3-0.35.3-32.3
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-87.4338.7-29.220698.716
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.0

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfFinancingCosts

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value200000.0300000.0200000.0200000.0300000.0200000.0300000.0200000.0200000.0200000.0300000.0200000.0200000.0200000.0200000.0300000.0200000.0200000.0200000.0300000.0100000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value15151415151514131313121313131214141515181721343533323347383332333331
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-8.010-0.3-6.3-4.6-6.3128.8-5.6-3.5-4.6-7.011-6.39.3-7.35.7-2.85.2-2.7-14.3-14.8-19.7-9.1-4.5-9.4102610-9.755-1.0239.99-0.911-24.156
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-0.8999999999999981-16.65.623-19.3-38.8-3.1265.5-11.2-8.2183.7-14.1-6.521-2.2-14.9-5.823-3.4-50.1-27.218-11.2-25.2271219-34.527-1.888292.006-23.087
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1712-33.0-5.80.022-10.8-6.61.416-14.0-4.21914-1.83.5248.1-13.9-16.23.94.3-18.6-4.21.0102.5035.9933.6656.039-1.2376.1021.168.075
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-700000.0-1300000.01700000.02000000.0700000.0-1800000.02100000.02100000.0-1800000.0-2300000.0-2000000.0-1200000.0800000.0-2800000.0-1600000.03700000.0-300000.0700000.0829000.01464000.0-2392000.04566000.0-4233000.08797000.0
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value21392726-1.53922-11.2
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1712295.6-19.5-9.120255.9-2.779-16.24.6-0.38515-29.7-3.219-7.6-24.6-29.4-187.0-14.9-16.1-15.8-1.1-14.609-78.9037.64332441611
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1571.4-208700.0-657525.069481.84569.43792.61606.11107.4

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value17125.6-19.5-9.120255.9-2.779-16.24.6-0.38515-29.7-3.219-7.6-16.1-15.8-1.137-14.61-78.90110
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0103.4100.0100.0139.3
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1624.3-208714.3-657508.396800.0
Percentage of InterestIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7.4114.94.84.13.56.05.27.36.76.26.57.37.06.56.26.36.15.15.25.85.44.95.03.63.02.5372.562.4171.4870.3230.5480.5640.565
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-90.3-7.0-14.8-5.7-6.8-7.8-66.5-8.1-9.4-26.5-22.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value105.2115.86.87.88.68.19.4152210.024238.21213177.710109.8149.821171526172331152929
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-18.51.2-52.1-51.40.7781.8-15.3-0.35.3-32.3
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value1.20.00.0150.00.0
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.0100.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7.417.8100.829.1-0.06-0.208-0.0280.1640.366-26.0-1.5121.7040.2412.01.2850.025-0.3170.0411.0840-0.259-0.238-0.0520.1860.0190.285-0.079-0.095-0.7230.2460.058-0.156-0.0530.017
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value15.4915.5417.4417.4917.4817.417.5117.5117.4717.4917.6417.717.6717.7218.3618.3818.3818.4218.0318.0618.0918.2822.5822.6122.8822.9329.3129.4829.529.350
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2521635638295183
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1012101211125.05.56.66.4
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value9885131991611828071
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0

kn:CorporateExpenseandOther us-gaap:ConsolidationItems

kn:CorporateExpenseandOther

us-gaap:CorporateNonSegment


Corporate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value14151413137.912121615131513141316141511131613
Percentage of CorporateExpenseandOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

kn:CostofGoodsSoldRestructuringCharges

kn:CostofGoodsSoldRestructuringCharges


Costof
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.00.00.91.40.70.10.40.50.30.00.10.00.10.2-0.64.30.10.00.21.23.20.50.5-0.62.1834.7160.00.9810.955
Percentage of CostofGoodsSoldRestructuringCharges0.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

kn:DebtIssuanceCostsAttributabletotheEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

kn:DebtIssuanceCostsAttributabletotheEquityComponent

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value01300000.00001300000.0000
Percentage of DebtIssuanceCostsAttributabletotheEquityComponent0.0100.00.00.00.0100.00.00.00.0

kn:EffectiveIncomeTaxRateReconciliationDiscreteItems

kn:EffectiveIncomeTaxRateReconciliationDiscreteItems


Effective
Period End2021-06-302019-09-302018-09-302018-06-302017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-31
Value-1.20.2390.4-3.52.10.0-4.4-0.10.8-3.0-0.92.71.792322.9980.54
Percentage of EffectiveIncomeTaxRateReconciliationDiscreteItems100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

kn:EffectiveTaxRateExcludingDiscreteItems

kn:EffectiveTaxRateExcludingDiscreteItems


Effective
Period End2021-06-302020-09-302019-09-302018-09-302018-06-302017-09-302017-06-302016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value13.844.30.1580.1340.1720.2470.2260.2110.2780.129-0.0220.0760.065-0.2050.009-0.05
Percentage of EffectiveTaxRateExcludingDiscreteItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

kn:IncreaseDecreaseAccruedTaxesNet

kn:IncreaseDecreaseAccruedTaxesNet


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value-2.4-0.90.1-2.91.01.2-0.439-3.2-2.8-0.9-4.01.03.41.4-1.0-11.7-5.5-2.2-6.625-1.0
Percentage of IncreaseDecreaseAccruedTaxesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsExpiredinPeriodWeightedAverageExercisePrice us-gaap:AwardType

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsExpiredinPeriodWeightedAverageExercisePrice

us-gaap:StockAppreciationRightsSARS


Sharebased
Period End2021-06-302021-03-31
Value022.17
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsExpiredinPeriodWeightedAverageExercisePrice0.0100.0

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet


Adjustment
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
Value0-6600000.00-100000.0-200000.0-5800000.0-400000.0-500000.0-700000.0-4800000.0-200000.0-400000.0-700000.0-3400000.0-200000.0-400000.0-1100000.0-3400000.00-600000.0-100000.0-800000.0-500000.0-1300000.00-400000.0
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustment
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
Value0-6600000.00-100000.0-200000.0-5800000.0-400000.0-500000.0-700000.0-4800000.0-200000.0-400000.0-700000.0-3400000.0-200000.0-400000.0-1100000.0-3400000.00-600000.0-100000.0-800000.0-500000.0-1300000.00-400000.0
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.18.40.11.30.45.70.90.90.20.10.2
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.18.40.11.30.45.70.90.90.20.10.2
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfDebtDiscountPremium

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2000000.01900000.01900000.01900000.01800000.01800000.01700000.01700000.01700000.01700000.01600000.01600000.01600000.01500000.01500000.01400000.01500000.01400000.01300000.01400000.0900000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value2400000.02300000.02300000.02300000.02200000.02100000.02000000.02000000.02100000.02000000.01900000.01900000.02000000.01800000.02100000.01800000.02000000.01700000.01700000.01900000.01800000.0200000.0800000.0-400000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2020-12-312020-09-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-30
Value0.07.60.00.00.00.00.0190.50.00.0
Percentage of AssetImpairmentCharges0.0100.00.00.00.00.00.0100.0100.00.00.0

us-gaap:AssetImpairmentCharges us-gaap:ImpairedLongLivedAssetsHeldAndUsedByType

kn:MountainViewCalifornia


Asset
Period End2020-09-30
Value5.4
Percentage of AssetImpairmentCharges71.1

kn:SantaClaraCalifornia


Asset
Period End2020-09-30
Value2.2
Percentage of AssetImpairmentCharges28.9

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0-1600000.0-500000.0-500000.0-600000.0600000.0-200000.0-500000.09600000.01900000.0-300000.0-2500000.0-29500000.0-1400000.02900000.0-2100000.05400000.0-3600000.01900000.0300000.0-25000000.0000
Percentage of DeferredIncomeTaxesAndTaxCredits0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value111111111212121112111111111111111111
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax us-gaap:DisposalGroupClassification

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax

us-gaap:DiscontinuedOperationsDisposedOfBySale


Discontinued
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.20.00.00.03.70.21.60.20.1535.21.21.8
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare


Discontinued
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0000.04-0.0100000.02000.660.010.010.010.01-0.32-0.2-0.19-2.07-0.22-0.35-0.25
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare0.00.00.0100.0100.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare


Discontinued
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
Value0.010000.04000000.02000.6500.010.010.03-0.32-0.2-0.19-2.07-0.22-0.35-0.25
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare100.00.00.00.0100.00.00.00.00.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation


Discontinued
Period End2021-06-30
Value-0.2
Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value-100000.0100000.0300000.0100000.0-200000.0-200000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-200000.0300000.0-100000.0-100000.0-100000.0-100000.000000-200000.0-200000.0300000.00-100000.01300000.00-600000.0-700000.0000
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.00.00.0

us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleAmountOfImpairmentLoss

us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleAmountOfImpairmentLoss


Impaired
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value00400000.01300000.000
Percentage of ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleAmountOfImpairmentLoss0.00.0100.0100.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet us-gaap:ConsolidationItems

us-gaap:IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet

us-gaap:OperatingSegments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value37345025-1.11.042462919464423184734-1.2144241127.0-183.41.81.10.76.3-1.2-32.722
Percentage of IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, kn:Audio


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value28304517-12.2-6.135392111383717124628-7.18.938368.45.7
Percentage of IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet74.187.189.269.01109.1-610.083.283.772.161.183.084.373.066.597.581.0591.761.890.387.369.481.4

us-gaap:OperatingSegments, kn:PrecisionDevices


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9.84.55.58.0117.17.17.68.27.57.97.06.46.21.26.65.95.52.15.33.71.3
Percentage of IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet25.912.910.831.0-1009.1710.016.816.327.938.917.015.727.033.52.519.0-491.738.25.012.730.618.6

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity


Income
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
Value0.20.00.00.03.7-0.60.00.00.00.21.60.20.1590.30.61.51.8-28.5-17.8-16.9-180.4-19.7-29.4-20.8
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity100.00.00.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare


Income
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
Value0.010000.04000000.02000.6500.010.010.03-0.32-0.2-0.19-2.07-0.22-0.35-0.25
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare100.00.00.00.0100.00.00.00.00.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxHolidayAggregateDollarAmount us-gaap:IncomeTaxAuthority

us-gaap:IncomeTaxHolidayAggregateDollarAmount

us-gaap:ForeignCountry


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value3.02.4-0.42.70.21.30.26.54.53.42.07.22.61.51.97.8-4.20.1-0.7122.83.43.76.0-0.43.54.44.4
Percentage of IncomeTaxHolidayAggregateDollarAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxHolidayIncomeTaxBenefitsPerShare us-gaap:IncomeTaxAuthority

us-gaap:IncomeTaxHolidayIncomeTaxBenefitsPerShare

us-gaap:ForeignCountry


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-30
Value0.030.03-0.010.030.010.0100.070.050.040.020.080.030.020.020.090.050-0.010.140.030.040.040.07-0.010.110.030.06
Percentage of IncomeTaxHolidayIncomeTaxBenefitsPerShare100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.20.1-5.44.43.60.0-2.20.6-0.81.8-4.03.8-4.9-3.72.11.3-1.95.8-1.8-7.2-1.61.03.2-9.3-4.7-4.111-10.92624-1.836-4.785-1.3768.76-2.099
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6800000.0-7700000.03200000.04900000.0100000.0-10300000.01300000.01800000.06200000.0-17400000.05300000.05200000.07400000.0-10000000.04500000.0400000.05400000.0-11200000.04300000.0300000.02800000.0-8100000.03000000.04400000.02900000.0-10000000.0837000.0469000.09688000.0-14394000.02670000.04779000.02062000.0-6511000.0
Percentage of IncreaseDecreaseInEmployeeRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-300000.01500000.0-3600000.0-1900000.04100000.02000000.0700000.0-1800000.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.42.2-1.31.70.5-0.4-0.85.1321.3-2.60.3-25.5-0.2-2.3-0.20.40.12.70.12.00.8-0.81.40.080.3675.4810.0724.294-4.1446.7693.381
Percentage of IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-400000.03300000.0-1400000.0-1100000.0-3000000.05600000.0-3300000.0-2400000.0100000.02900000.0-1300000.0-1100000.0500000.03200000.07600000.0-1600000.01400000.01000000.0-1000000.0-2000000.0700000.03500000.0-2100000.0-5300000.05600000.0200000.0-5536000.0249000.0371000.03216000.0983000.02805000.0-633000.045000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebtExcludingAmortization

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01400000.01300000.01400000.01000000.0
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRevenueExpenseNet

us-gaap:InterestRevenueExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-4.1-4.0-3.899999999999998-4.7-4.1-3.7-3.6-3.8-3.6-3.5-3.9-4.0-4.1-4.0-5.2-5.1-5.1-5.2-5.3-5.6-5.8-3.7-3.5-3.7-3.1-2.4-2.093-2.015-1.82-0.672-5.816-12.167-12.069-11.948
Percentage of InterestRevenueExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRevenueExpenseNet us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-4.1-4.0-4.7-4.1-3.7-3.8-3.6-3.5-4.0-4.1-4.0-5.1-5.1
Percentage of InterestRevenueExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityCommitmentFeePercentage us-gaap:Range, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityCommitmentFeePercentage

srt:WeightedAverage, us-gaap:LineOfCredit


Line
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-0.010.270.247700.0023000.0023-0.0001-0.00030.0028
Percentage of LineOfCreditFacilityCommitmentFeePercentage100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1


Noncash
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-1.02.5-1.4-0.63.91.1-0.53.62.1-5.9110.70.72.2-2.52.53.80.0-1.07.8-7.027124.2532.234-7.90214
Percentage of NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-200000.0-200000.04900000.0-200000.0-100000.0200000.03600000.0-100000.0-200000.0-100000.0800000.0-100000.0-200000.0-100000.0-1300000.00005000000.0000100000.00-100000.0-200000.04800000.0-400000.0-200000.0200000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-400000.0-200000.03900000.0-300000.0-300000.0100000.03600000.0-100000.0-200000.0-100000.0600000.0-100000.0-200000.0-100000.0-1300000.00005100000.000000-100000.0-100000.03800000.0-300000.0-100000.0100000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value200000.0100000.0200000.0-300000.00000200000.00000000-100000.0000100000.000-100000.01000000.0-100000.0-100000.0100000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent100.0100.0100.0100.00.00.00.00.0100.00.00.00.00.00.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value100000.0-1900000.0900000.01100000.0600000.0-1200000.01800000.0-1100000.0-500000.0900000.01400000.0-200000.0-2600000.0400000.0200000.0500000.01500000.02200000.0-1700000.0-100000.0-2000000.01600000.0700000.0-1000000.00-1100000.0-300000.0000
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0-1800000.0700000.0900000.0600000.0-1100000.01500000.0-900000.0-400000.0700000.01200000.0-200000.0-2100000.0200000.00400000.01300000.02000000.0-1200000.0-100000.0-1900000.01600000.0700000.0-1400000.00-700000.0-200000.0000
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value100000.0-100000.0200000.0200000.00-100000.0300000.0-200000.0-100000.0200000.0200000.00-500000.0200000.0200000.0100000.0200000.0200000.0-500000.00-100000.000400000.00-400000.0-100000.0000
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.00.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.9-3.68.79.23.4-7.54.7-4.9-2.54.00.5-7.7-7.64.92.14.95.414-36.327-4.013-11.6-17.08.3-51.4-33.2-34.5-9.3-1.6
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.9-3.68.79.23.4-7.54.7-4.9-2.54.00.5-7.7-7.64.92.14.95.414-36.327-4.013-11.6-17.08.3-51.4-33.2-34.5-9.3-1.6
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.2-5.34.7104.1-8.52.9-5.9-2.85.01.1-7.8-10.05.43.65.46.916-43.027-6.015-11.0-18.08.4-52.3-38.278-34.142-9.024-1.82719239.157-19.357
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0-1800000.0900000.0600000.0-1100000.0-900000.0-400000.0700000.0-200000.0-2100000.0200000.0400000.01300000.02000000.0-100000.0-1900000.01600000.0-1400000.0-1400000.00-700000.0000110000.0-125000.0-142000.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.3-5.25.5104.3-8.72.6-5.7-2.74.81.1-7.8-9.55.23.45.36.716-42.627-5.915-10.9-18.48.4-52.0-37.194-34.242-9.099-1.76519239.193-19.281
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.40.2-3.90.30.3-0.1-3.60.10.20.1-0.60.10.20.11.30.00.00.0-5.10.00.00.00.00.00.10.1-3.8240.2990.14-0.115-0.3130.3170.0960.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent30.8-3.8-70.92.97.01.1-138.5-1.8-7.42.1-54.5-1.3-2.11.938.20.00.00.012.00.0-0.00.0-0.0-0.01.2-0.210.3-0.9-1.56.5-1.61.31.0-0.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-312013-09-302013-06-302013-03-31
Value0.0-1.80.70.90.6-1.11.5-0.9-0.40.71.2-0.2-2.10.20.00.41.32.0-1.2-0.1-1.91.60.7-1.40.0-0.70.1570.11-0.125-0.142
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.034.612.78.714.012.657.715.814.814.6109.12.622.13.80.07.519.412.02.8-0.432.210.3-6.47.60.01.30.80.5-1.40.7

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value104.3-8.72.6-5.7
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.9-3.68.79.23.4-7.54.7-4.9-2.54.00.5-7.7-7.64.92.14.95.414-36.327-4.013-11.6-17.08.3-51.4-33.17-34.541-9.239-1.6519239.222-19.139
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent69.269.2158.288.579.186.2180.886.092.683.345.598.780.094.261.892.580.688.085.2100.467.889.7106.492.498.898.889.2100.9101.593.5100.898.2100.399.3

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-600000.0-1300000.01400000.0-600000.0300000.0100000.0-1600000.0-500000.00-200000.0-1100000.0-1100000.0100000.0700000.0-1800000.0-400000.0300000.01400000.0-1100000.0-100000.0300000.0-100000.00300000.0-300000.00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value500000.01000000.0800000.0500000.0-300000.0-100000.0-200000.0-400000.00-100000.0-900000.0-900000.0100000.0600000.01000000.0400000.0-300000.0-1400000.0-800000.0100000.0-300000.0100000.00000000-38000.0-53000.0-9000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value100000.0300000.0200000.0100000.0000-100000.00-100000.0-400000.0-200000.00100000.0-300000.00100000.00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax100.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.00.0100.0100.00.0100.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value200000.0200000.0-1200000.0200000.0100000.0200000.0-200000.0-100000.0-200000.0-100000.0-200000.0-100000.0-200000.0-100000.0-600000.0000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-400000.0-200000.0-100000.0-300000.0-300000.0-100000.0-100000.0-100000.0-200000.0100000.0-200000.0-100000.000-500000.0000-600000.00-100000.0-100000.0-561000.0-299000.0-140000.0044000.0-50000.0-94000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-400000.0-200000.01100000.0-300000.0-300000.0-100000.0100000.0100000.0200000.0100000.0100000.0100000.0200000.0100000.0600000.0000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value200000.0100000.0200000.0-300000.0100000.0000100000.00000000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-100000.0-100000.0-800000.0100000.0-200000.0200000.0300000.0-200000.0-100000.0200000.000-500000.0200000.0200000.0100000.0200000.0200000.0-400000.00-100000.00-100000.0400000.00-300000.0-1084000.0100000.075000.0-62000.053000.0159000.0-36000.0-76000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value500000.0-800000.01500000.01400000.0300000.0-1200000.01300000.0-1300000.0-400000.0600000.0300000.0-1100000.0-2000000.0800000.01000000.0800000.01000000.0600000.0-2000000.00-2200000.01700000.0700000.0-1400000.00-700000.0-200000.0000119000.057000.0-134000.0-142000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromInvestments

us-gaap:PaymentsForProceedsFromInvestments


Payments
Period End2021-06-302021-03-31
Value1400000.02100000.0
Percentage of PaymentsForProceedsFromInvestments100.0100.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.81.11.32.52.33.31.02.11.21.10.30.52.42.81.73.02.51.10.99.03.13.82.99.91.64.43.951104.691.059
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.60.91.12.32.23.31.02.11.21.10.30.52.42.71.71.22.51.10.87.22.13.42.69.31.13.83.1499.7314.171.05
Percentage of PaymentsForRestructuring75.081.884.692.095.7100.0100.0100.0100.0100.0100.0100.0100.096.4100.040.0100.0100.088.980.067.789.589.793.968.886.479.793.688.999.2

us-gaap:FacilityClosing


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.20.20.20.20.10.00.00.00.00.00.00.00.00.10.01.80.00.00.11.81.00.40.30.60.50.60.8020.6690.520.009
Percentage of PaymentsForRestructuring25.018.215.48.04.30.00.00.00.00.00.00.00.03.60.060.00.00.011.120.032.310.510.36.131.213.620.36.411.10.8

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value500000.01700000.0000006300000.0400000.00300000.000447000.0002853000.00000
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.00.00.00.00.0100.0100.00.0100.00.00.0100.00.00.0100.00.00.00.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value06600000.00100000.0200000.05800000.0400000.0500000.0700000.04800000.0200000.0400000.0700000.03400000.0200000.0400000.01100000.03400000.00600000.0100000.0800000.0500000.01300000.00400000.00000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:ProceedsAndExcessTaxBenefitFromSharebasedCompensation

us-gaap:ProceedsAndExcessTaxBenefitFromSharebasedCompensation


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302014-09-30
Value2.18.40.11.30.25.70.90.70.20.10.20.20.32.80.00.00.00.0-0.1
Percentage of ProceedsAndExcessTaxBenefitFromSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value0.00.00.01000.00.00.010.06.00.00.00.0175150.0120.0950.00.0
Percentage of ProceedsFromLinesOfCredit0.00.00.0100.00.00.00.0100.0100.00.00.00.0100.0100.00.0100.00.0100.00.00.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value100000.0300000.0200000.0100000.000400000.0100000.0001300000.00700000.0100000.0100000.0300000.00125000.0-44000.0229000.0115000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.00.00.0100.0100.00.00.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value500.0371850.00.00.055570.0204115290.00.00.0
Percentage of RepaymentsOfLinesOfCredit100.00.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.00.00.00.0

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value600000.0600000.0600000.0500000.0400000.0500000.0300000.0500000.0500000.0400000.0400000.0400000.0500000.0400000.0400000.0500000.0300000.0400000.0400000.0300000.0500000.01100000.0400000.0400000.0200000.0400000.00000
Percentage of RepaymentsOfLongTermCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RestructuringAndRelatedCostIncurredCost

us-gaap:RestructuringAndRelatedCostIncurredCost


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.10.2-0.50.26.84.11.22.00.52.30.60.50.60.41.91.12.25.01.12.13.94.76.49.40.8-0.32.8675.79200.243
Percentage of RestructuringAndRelatedCostIncurredCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringAndRelatedCostIncurredCost us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.10.2-0.50.25.74.01.22.00.52.30.60.50.60.41.90.70.85.0-0.70.92.64.76.68.60.7-0.52.8065.987150.243
Percentage of RestructuringAndRelatedCostIncurredCost100.0100.0100.0100.083.897.6100.0100.0100.0100.0100.0100.0100.0100.0100.063.636.4100.0-63.642.966.7100.0103.191.587.5166.797.9103.475.7100.0

us-gaap:FacilityClosing


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.01.10.10.00.00.00.00.00.00.00.00.00.41.40.00.11.21.30.0-0.20.80.10.20.061-0.1975.0360.0
Percentage of RestructuringAndRelatedCostIncurredCost-0.00.016.22.40.00.00.00.00.00.00.00.00.036.463.60.09.157.133.30.0-3.18.512.5-66.72.1-3.424.30.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.10.21.80.16.53.92.21.90.11.80.70.50.50.45.80.92.80.72.52.13.73.56.88.90.30.3231.094.2830.2438.2861.0465.4763.315
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve

us-gaap:CorporateNonSegment, kn:EmployeeSeveranceandFacilityClosing


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value0.00.51.20.00.00.20.20.00.00.51.40.11.10.00.40.40.0
Percentage of RestructuringCharges0.07.730.80.00.011.140.00.00.055.650.014.352.40.011.44.50.0

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

us-gaap:OperatingSegments, kn:EmployeeSeveranceandFacilityClosing, kn:Audio


Restructuring
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value0.10.20.06.94.11.90.11.80.30.50.30.60.74.71.03.13.0
Percentage of RestructuringCharges100.0100.00.0106.2105.1100.0100.0100.060.0100.075.066.725.0671.447.683.885.7

us-gaap:OperatingSegments, kn:EmployeeSeveranceandFacilityClosing, kn:PrecisionDevices


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value0.10.00.00.10.40.30.00.10.10.00.10.20.00.81.3
Percentage of RestructuringCharges100.00.00.05.3400.016.70.020.025.00.03.628.60.021.637.1

us-gaap:RestructuringCharges us-gaap:IncomeStatementLocation, us-gaap:RestructuringCostAndReserve

kn:CostofGoodsSoldRestructuringCharges, kn:EmployeeSeveranceandFacilityClosing


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302017-09-302017-06-302017-03-31
Value0.00.91.40.10.40.50.00.2-0.64.3
Percentage of RestructuringCharges0.013.835.95.3400.027.80.022.2-21.4614.3

us-gaap:OperatingExpense, kn:EmployeeSeveranceandFacilityClosing


Restructuring
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.10.20.16.53.91.90.11.80.50.50.40.92.8
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:ProductOrService

kn:IntelligentAudio


Restructuring
Period End2020-09-302020-06-30
Value9.313225746154785e-164.9
Percentage of RestructuringCharges0.075.4

us-gaap:RestructuringCharges us-gaap:ProductOrService, us-gaap:IncomeStatementLocation, us-gaap:RestructuringCostAndReserve

kn:Audio, kn:CostofGoodsSoldRestructuringCharges, us-gaap:EmployeeSeverance


Restructuring
Period End2020-09-302020-06-30
Value0.12.5
Percentage of RestructuringCharges100.038.5

kn:IntelligentAudio, kn:CostofGoodsSoldRestructuringCharges, us-gaap:ContractTermination


Restructuring
Period End2020-09-302020-06-30
Value0.01.2
Percentage of RestructuringCharges0.018.5

kn:IntelligentAudio, kn:CostofGoodsSoldRestructuringCharges, us-gaap:EmployeeSeverance


Restructuring
Period End2020-09-302020-06-30
Value0.03.3
Percentage of RestructuringCharges0.050.8

kn:IntelligentAudio, kn:CostofGoodsSoldRestructuringCharges, us-gaap:FacilityClosing


Restructuring
Period End2020-09-302020-06-30
Value0.00.4
Percentage of RestructuringCharges0.06.2

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

kn:EmployeeSeveranceandFacilityClosing


Restructuring
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value0.10.20.17.45.32.00.52.30.50.60.41.12.25.02.13.94.79.40.8-0.35.79200.22.001
Percentage of RestructuringCharges100.0100.0100.0113.8135.9105.3500.0127.8100.0120.0100.0122.278.6714.3100.0105.4134.3105.6266.7-100.0531.2483.382.3191.3

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value017.16001.215.850015.65000000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0100.00.00.0100.0100.00.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.5717.220-0.020.2515.990.020.070.1715.330.11-0.64-0.1415.510.050.021.1914.51
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0100.30.00.020.8100.90.00.01.10.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value028.4600016.140.2600.0918.32000.0313.750-0.08015.4
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.00.0100.0100.00.0100.0100.00.00.0100.0100.00.0100.00.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0520.6-0.02-0.02-0.2516.770.110.080.0116.070.030.11-0.1514.29-0.12-0.47-0.1319.27
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.072.40.00.00.0103.942.30.011.187.70.00.0-500.0103.90.0587.50.0125.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value013.750-0.14015.38000000000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.00.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.2515.790.010.030.0216.240.020.03-0.415.07-0.05-0.1-0.5717.67-0.020.1-1.3317.36
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0114.80.0-21.40.0105.60.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:Range, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

srt:Maximum, us-gaap:EmployeeStockOption


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-31
Value040.19400.406000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate0.0100.00.0100.00.00.00.0

srt:Minimum, us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-31
Value36.0038.41200.388-0.01-0.008-0.049
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate0.00.095.60.095.60.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:Range, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

srt:Maximum, us-gaap:EmployeeStockOption


Share
Period End2020-12-312020-09-302019-12-312019-09-302017-12-31
Value01.4058000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.0100.00.00.00.0

srt:Minimum, us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302017-12-31
Value0.0600.1084-0.01260.0142-0.0017-0.00570
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.00.07.70.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:Range, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

srt:Maximum, us-gaap:EmployeeStockOption


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-31
Value0005.950.10.801.20
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.0100.0100.0100.00.0100.00.0

srt:Minimum, us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value06.1400-0.785.560006.2200-1.05
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.00.00.093.40.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost us-gaap:AwardDate, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost

kn:A2018, us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value03900000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost0.0100.0

kn:A2019, us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value02400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost0.061.5

kn:A2020, us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value04700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost0.0120.5

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value0.2315.920.18
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value029.531.14
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice0.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value0.5116.540
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0100.00.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value0.0120.60
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302020-09-302020-06-302020-03-31
Value200.00.015
Percentage of TreasuryStockValueAcquiredCostMethod100.00.00.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-06-302020-12-312020-09-302020-06-302020-03-31
Value201.20.00.015
Percentage of TreasuryStockValueAcquiredCostMethod100.00.00.00.0100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-02-082020-07-272020-05-01
Value919191
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0

kn:DeferredTaxAssetsValuationAllowanceJudgmentRegardingtheRealizabilityoftheBeginningoftheYearDeferredTaxAsset

kn:DeferredTaxAssetsValuationAllowanceJudgmentRegardingtheRealizabilityoftheBeginningoftheYearDeferredTaxAsset


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value988513199161127
Percentage of DeferredTaxAssetsValuationAllowanceJudgmentRegardingtheRealizabilityoftheBeginningoftheYearDeferredTaxAsset100.0100.0100.0100.0100.0100.0

kn:DefinedBenefitPlanAmountsRecognizedontheBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeLoss us-gaap:RetirementPlanType

kn:DefinedBenefitPlanAmountsRecognizedontheBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeLoss

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-800000.0-1200000.0-1700000.0-1600000.0
Percentage of DefinedBenefitPlanAmountsRecognizedontheBalanceSheetIncludingAccumulatedOtherComprehensiveIncomeLoss100.0100.0100.0100.0

kn:OperatingLossCarryforwardsNotSubjecttoExpiration us-gaap:IncomeTaxAuthority

kn:OperatingLossCarryforwardsNotSubjecttoExpiration

us-gaap:ForeignCountry


Operating
Period End2020-12-31
Value4600000.0
Percentage of OperatingLossCarryforwardsNotSubjecttoExpiration100.0

kn:OperatingLossCarryforwardsSubjecttoExpiration us-gaap:IncomeTaxAuthority

kn:OperatingLossCarryforwardsSubjecttoExpiration

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312016-12-312015-12-31
Value5199111
Percentage of OperatingLossCarryforwardsSubjecttoExpiration100.0100.0100.0

kn:OperatingLossCarryforwardsSubjecttoExpirationin1020years us-gaap:IncomeTaxAuthority

kn:OperatingLossCarryforwardsSubjecttoExpirationin1020years

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value131518
Percentage of OperatingLossCarryforwardsSubjecttoExpirationin1020years100.0100.0100.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value9.79.11.9
Percentage of OperatingLossCarryforwardsSubjecttoExpirationin1020years72.957.610.1

kn:OperatingLossCarryforwardsSubjecttoExpirationin510years us-gaap:IncomeTaxAuthority

kn:OperatingLossCarryforwardsSubjecttoExpirationin510years

us-gaap:DomesticCountry


Operating
Period End2020-12-312017-12-31
Value1012
Percentage of OperatingLossCarryforwardsSubjecttoExpirationin510years100.0100.0

kn:OtherSundryAccuredLiabilitesCurrent

kn:OtherSundryAccuredLiabilitesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4.34.37.39.811231915
Percentage of OtherSundryAccuredLiabilitesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

kn:PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesTax us-gaap:RetirementPlanSponsorLocation

kn:PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesTax

us-gaap:ForeignPlan


Pensionand
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4800000.0-3800000.0-3800000.0-3600000.0-3600000.0
Percentage of PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesTax100.0100.0100.0100.0100.0

kn:PensionandOtherPostretirementDefinedBenefitPlansOtherLIabilities us-gaap:RetirementPlanType

kn:PensionandOtherPostretirementDefinedBenefitPlansOtherLIabilities

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Pensionand
Period End2020-12-312019-12-312018-12-312017-12-31
Value800000.0800000.0800000.01600000.0
Percentage of PensionandOtherPostretirementDefinedBenefitPlansOtherLIabilities100.0100.0100.0100.0

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsOutstandingWeightedAverageExercisePrice

us-gaap:StockAppreciationRightsSARS


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-31
Value22.8422.8422.7222.7222.7222.7222.7222.7221.9921.8521.8521.8521.8521.5321.5421.5421.5421.2521.2521.2321.2620.9520.9220.9320.9620.8120.8120.8420.850
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherthanOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisableWeightedAverageExercisePrice

us-gaap:StockAppreciationRightsSARS


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-30
Value22.8422.8422.7222.72
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestExercisedAggregateIntrinsicValue us-gaap:AwardType

kn:SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestExercisedAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value400000.02700000.0200000.01100000.000200000.0900000.0700000.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestExercisedAggregateIntrinsicValue100.0100.0100.0100.00.00.0100.0100.0100.0

kn:StockholdersEquityExcludingNetFormerParentCompanyInvestment

kn:StockholdersEquityExcludingNetFormerParentCompanyInvestment


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-03-312013-12-31
Value13031288121111321008100612361271140436
Percentage of StockholdersEquityExcludingNetFormerParentCompanyInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxes

us-gaap:AccruedIncomeTaxes


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3700000.02000000.02100000.02400000.02100000.0
Percentage of AccruedIncomeTaxes100.0100.0100.0100.0100.0

us-gaap:AccruedInsuranceCurrentAndNoncurrent

us-gaap:AccruedInsuranceCurrentAndNoncurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1700000.01900000.01600000.01900000.01600000.0
Percentage of AccruedInsuranceCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:AccruedMarketingCostsCurrent

us-gaap:AccruedMarketingCostsCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3500000.03300000.04700000.04700000.03200000.03200000.0
Percentage of AccruedMarketingCostsCurrent100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanSponsorLocation

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:ForeignPlan


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2118151516
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.20.10.00.2
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax0.90.50.01.3

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1.61.61.61.71.81.80.81620.60.60.60.00.50.60.70.81.61.61.72.22.21.51.80.70.80.80.80.760.8381.0351.686
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BilledContractReceivables

us-gaap:BilledContractReceivables


Billed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value10810512311693112152153126128
Percentage of BilledContractReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value2200000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value3000000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

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

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

kn:IntegratedMicrowaveCorporation, us-gaap:CustomerRelationships


Business
Period End2021-05-03
Value27
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

kn:IntegratedMicrowaveCorporation, us-gaap:Trademarks


Business
Period End2021-05-03
Value1.6
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles5.8

kn:IntegratedMicrowaveCorporation, us-gaap:UnpatentedTechnology


Business
Period End2021-05-03
Value5.2
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles18.8

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value2600000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value1200000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value80
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

kn:IntegratedMicrowaveCorporation


Business
Period End2021-05-03
Value8300000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

us-gaap:CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations

us-gaap:CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value94181147139168147786953417368506211154455963
Percentage of CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ConvertibleDebt

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Convertible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value165156149141135
Percentage of ConvertibleDebt100.0100.0100.0100.0100.0

us-gaap:ConvertibleLongTermNotesPayable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ConvertibleLongTermNotesPayable

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Convertible
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value163160158156154152151149147145143141141139137136
Percentage of ConvertibleLongTermNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleNotesPayable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ConvertibleNotesPayable

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1691671651631601581561541521511491471451431411401381361351331310.0
Percentage of ConvertibleNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ConvertibleNotesPayableCurrent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ConvertibleNotesPayableCurrent

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Convertible
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1691671650.00.00.00.00.00.00.00.00.00.00.00.90.90.90.9
Percentage of ConvertibleNotesPayableCurrent100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1

us-gaap:DebtInstrumentConvertibleConversionPrice1


Debt
Period End2020-12-31
Value18.425
Percentage of DebtInstrumentConvertibleConversionPrice1100.0

us-gaap:DebtInstrumentFairValue us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFairValue

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value192201196183
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:Range, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:DebtInstrumentInterestRateEffectivePercentage

srt:WeightedAverage, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value2.180.02370.03090.03990.03990.04010.03480.03490.0370.0368
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentUnamortizedDiscount

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3.05.27.49.5111315171921232527283032343537
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2017171818182418
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

kn:ConvertibleNotesDueTwentyTwentyOne, us-gaap:ConvertibleDebt


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5000000.05000000.05000000.05000000.05000000.05000000.05000000.05000000.05000000.04900000.0
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7.47.65033453181108
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndOtherAssetsNoncurrent

us-gaap:DeferredIncomeTaxesAndOtherAssetsNoncurrent


Deferred
Period End2020-12-312019-12-31
Value1915
Percentage of DeferredIncomeTaxesAndOtherAssetsNoncurrent100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value123106194155200212132155
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsHedgingTransactions

us-gaap:DeferredTaxAssetsHedgingTransactions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.83.95.77.3140.0
Percentage of DeferredTaxAssetsHedgingTransactions100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsInventory


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6500000.04100000.03900000.03600000.07500000.07500000.06900000.06000000.0
Percentage of DeferredTaxAssetsInventory100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7167155115148151101139
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value13109.49.64.4206.30.2
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value141415131914114.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value8.66.54.65.96.5174.83.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-31
Value7700000.0800000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.42.94.45.7110.0
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4.33.78.710273079105
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.81.037176.71.61.93.2
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings


Deferred
Period End2020-12-312018-12-312017-12-312016-12-31
Value0.90.0250.0
Percentage of DeferredTaxLiabilitiesUndistributedForeignEarnings100.00.0100.00.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7362525751
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

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us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-25600000.0-21200000.0-18000000.0-18400000.0-20100000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0100.0

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us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1100000.01200000.01300000.0300000.00
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax100.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-8800000.0-5900000.0-5900000.0-6100000.0-8600000.0
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

country:GB


Defined
Period End2020-12-312019-12-312018-12-31
Value1.280.020.028
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0

country:PH


Defined
Period End2020-12-312019-12-312018-12-31
Value4.00.050.0825
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate312.5250.0294.6

country:TW


Defined
Period End2020-12-312019-12-312018-12-31
Value0.250.00750.0125
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate19.537.544.6

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.270.01970.02780.0240.026
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate99.298.599.30.00.0

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country:GB


Defined
Period End2020-12-312019-12-312018-12-31
Value4.20.04250.044
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0

country:PH


Defined
Period End2020-12-312019-12-312018-12-31
Value4.00.050.06
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease95.2117.6136.4

country:TW


Defined
Period End2020-12-312019-12-312018-12-31
Value4.00.040.0425
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease95.294.196.6

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.180.04240.04410.04460.0455
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease99.599.8100.20.00.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value746453575251
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

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us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value13
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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanSponsorLocation

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us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value2000000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value2600000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value2100000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value1800000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

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Defined
Period End2020-12-31
Value1900000.0
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us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:ForeignPlan


Defined
Period End2020-12-31
Value1500000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

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Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.30.40.30.10.2
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0

us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel2, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1817132118
Percentage of DefinedBenefitPlanFairValueOfPlanAssets6300.04425.04466.721900.09350.0

us-gaap:FixedIncomeFunds, us-gaap:FairValueInputsLevel1, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.42.41.92.32.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1133.3600.0633.32300.01250.0

us-gaap:FixedIncomeFunds, us-gaap:FairValueInputsLevel2, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2421181210
Percentage of DefinedBenefitPlanFairValueOfPlanAssets8300.05475.06166.712700.05250.0

us-gaap:OtherInvestments, us-gaap:FairValueInputsLevel1, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7.96.75.76.85.1
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2633.31675.01900.06800.02550.0

us-gaap:OtherInvestments, us-gaap:FairValueInputsLevel2, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.34.33.63.63.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1766.71075.01200.03600.01750.0

us-gaap:RealEstateFunds, us-gaap:FairValueInputsLevel2, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.04.03.63.50.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1666.71000.01200.03500.00.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation

us-gaap:CashAndCashEquivalents, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.31.21.11.03.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0300.0366.71000.01750.0

us-gaap:EquitySecurities, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1817132118
Percentage of DefinedBenefitPlanFairValueOfPlanAssets6300.04425.04466.721900.09350.0

us-gaap:FixedIncomeFunds, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2824201513
Percentage of DefinedBenefitPlanFairValueOfPlanAssets9433.36075.06800.015000.06500.0

us-gaap:OtherInvestments, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value13119.3108.6
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4400.02750.03100.010400.04300.0

us-gaap:RealEstateFunds, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.04.03.63.50.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1666.71000.01200.03500.00.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanSponsorLocation

us-gaap:FairValueInputsLevel1, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value119.57.99.27.8
Percentage of DefinedBenefitPlanFairValueOfPlanAssets3866.72375.02633.39200.03900.0

us-gaap:FairValueInputsLevel2, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5448394236
Percentage of DefinedBenefitPlanFairValueOfPlanAssets18033.312175.013300.042600.018000.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanSponsorLocation

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value655847514345
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21900.014550.015933.351800.021900.00.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-8800000.0-5900000.0-5900000.0-6100000.0-8600000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value653226
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4337313431
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3431242824
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7439313532
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation100.0100.0100.0100.0100.0

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

us-gaap:DerivativeAssets

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


Derivative
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2100000.0900000.0100000.0300000.0300000.0200000.0001000000.0600000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.00.00.0100.0100.0

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

us-gaap:DerivativeLiabilities

us-gaap:PrepaidExpensesAndOtherCurrentAssets, kn:ForeignCurrencyEconomicHedge, us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedge, us-gaap:Nondesignated


Derivative
Period End2020-12-312019-12-312018-12-312017-12-31
Value400000.0500000.0200000.00
Percentage of DerivativeLiabilities100.0100.0100.00.0

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

us-gaap:DerivativeNotionalAmount

us-gaap:ForeignCurrencyGainLoss, us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedge, us-gaap:Nondesignated


Derivative
Period End2020-12-312019-12-312019-09-302018-12-31
Value77412919
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:ForeignExchangeForward, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312019-09-302018-12-31
Value69615141
Percentage of DerivativeNotionalAmount89.5146.2174.0210.1

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable

us-gaap:DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable


Disposal
Period End2021-03-31
Value300000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities us-gaap:DisposalGroupClassification

us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities

us-gaap:DiscontinuedOperationsDisposedOfBySale


Disposal
Period End2020-12-312019-12-312017-12-312016-12-31
Value600000.0600000.00900000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities100.0100.00.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value30223026212132302822403430233130292434312824373430283838392940
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStockOption


Employee
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
Value4.05.04.75.66.68.65.56.88.39.65.87.18.6107.39.31114121518211619202212131415
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares


Employee
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
Value14163.03.33.77.86.38.010106.37.58.46.62.02.22.42.5
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized357.5338.063.858.956.190.7114.5117.6121.7106.2108.6105.697.765.327.423.720.517.6

us-gaap:RestrictedStockUnitsRSU


Employee
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
Value26281619233221273438232733372326303619212521151812128.69.4399.95410
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized650.0578.0346.8353.6362.1373.3398.2400.0410.8401.0398.3384.5383.7369.3316.4289.2261.5253.5162.5145.3136.8100.090.594.262.658.168.367.968.168.3

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-312019-12-312019-09-302019-06-30
Value8.19.39.710
Percentage of FinanceLeaseLiability100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2020-12-312019-12-31
Value2600000.02400000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-12-312019-12-31
Value5500000.06900000.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value9000000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths


Finance
Period End2020-12-31
Value2600000.0
Percentage of FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value1400000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value2500000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value2500000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value900000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-31
Value1011
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-31
Value5.55.6
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value565249454239363432333130282625246245252249246241235229319308295290283276266266
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6.75.75.24.94.44.03.63.22.82.52.01.71.31.00.7154153153152152149146143230222213210204198190181
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization11.910.910.610.710.310.210.09.38.57.46.35.64.63.72.862.562.760.861.361.862.062.262.472.072.172.372.372.171.971.468.1

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1.00.80.70.50.40.20.10.10.00.00.00.00.00.00.03.13.13.13.13.13.13.13.13.53.11.51.61.5211.4761.4321.389
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization1.81.51.41.10.90.50.30.30.00.00.00.00.00.00.01.31.31.21.21.31.31.31.31.11.00.50.60.50.50.50.5

us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value383736353332313029282625242322222120191816151416151312109.6468.35417
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization68.271.273.576.379.383.087.388.389.083.384.685.186.087.087.79.38.98.17.77.37.06.66.35.24.94.64.23.93.53.16.6

us-gaap:Trademarks


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.40.40.40.30.30.20.20.10.30.30.20.20.20.20.20.20.20.20.20.20.20.20.22.12.01.91.91.8121.7521.6381.503
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.70.80.80.70.70.50.60.30.90.90.60.70.70.70.80.10.10.10.10.10.10.10.10.70.60.60.70.60.60.60.6

us-gaap:UnpatentedTechnology


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value9.88.26.75.23.72.30.70.60.52.82.72.62.52.32.266667573727170686766646464646464
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.415.613.611.38.75.81.91.71.58.38.58.68.88.68.726.927.129.829.629.529.629.729.921.021.421.922.322.923.524.324.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value8.69.7133.2
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value106.66.67.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value117.07.07.1
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value117.17.17.7
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value117.77.713
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1269292929292925757595656565646272272298294294294294294543518511529538549547552
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value39121212121212121212101010103.3159159159156156156156156389391387404414425429429
Percentage of FiniteLivedIntangibleAssetsGross31.413.013.013.013.013.013.021.020.920.018.818.818.818.87.158.658.653.553.053.053.053.053.071.675.475.776.576.977.478.577.7

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.41.81.81.81.81.81.80.20.20.20.20.20.20.20.03.13.13.13.13.13.13.13.14.63.61.61.61.5641.5641.5641.564
Percentage of FiniteLivedIntangibleAssetsGross1.92.02.02.02.02.02.00.40.30.30.40.40.40.40.01.11.11.01.11.11.11.11.10.80.70.30.30.30.30.30.3

us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value40404040404040404040404040404042424242424242425050505049484247
Percentage of FiniteLivedIntangibleAssetsGross32.244.344.344.344.344.344.371.571.168.172.272.272.272.287.215.715.814.414.614.514.514.614.69.39.79.89.49.18.97.78.6

us-gaap:Trademarks


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.01.01.01.01.01.01.00.91.21.20.50.50.50.50.30.30.30.30.30.30.30.30.37.17.17.07.57.8198.1588.268.264
Percentage of FiniteLivedIntangibleAssetsGross1.61.11.11.11.11.11.11.62.12.00.90.90.90.90.60.10.10.10.10.10.10.10.11.31.41.41.41.51.51.51.5

us-gaap:UnpatentedTechnology


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value413636363636363.23.25.74.44.44.44.42.466669292929292929266656565656565
Percentage of FiniteLivedIntangibleAssetsGross32.939.639.639.639.639.639.65.65.69.57.87.87.87.85.124.424.430.931.331.331.331.331.317.012.812.812.412.212.012.011.9

us-gaap:InventoryGross

us-gaap:InventoryGross


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value199182169197194187167173184185166182187168148180175152143165177165192212212209197194191183177
Percentage of InventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterials

us-gaap:InventoryRawMaterials


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8993891061089482787980707072686573676464707073766973746966636055
Percentage of InventoryRawMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserves

us-gaap:InventoryValuationReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value37403937312625222526262726242231323434393838404041383533352928
Percentage of InventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcess

us-gaap:InventoryWorkInProcess


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value35333130273230323232303426232128242018211816173331393535322829
Percentage of InventoryWorkInProcess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Investments

us-gaap:Investments


Investments
Period End2020-12-31
Value2500000.0
Percentage of Investments100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths


Lessee
Period End2020-12-31
Value11
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.30.60.60.60.60.60.00.21.92.35.60.01.95.46.06.2293653
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification

us-gaap:DiscontinuedOperationsDisposedOfBySale


Liabilities
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.60.00.00.60.00.00.00.00.21.92.35.623
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation100.00.00.0100.00.00.00.00.0100.0100.0100.0100.0395.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent


Liabilities
Period End2021-03-31
Value0.3
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1500000.04200000.03500000.06500000.04900000.05700000.06100000.06400000.0
Percentage of LiabilityForUncertainTaxPositionsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCredit

kn:CreditFacilityDueJanuary22024, us-gaap:LineOfCredit


Line
Period End2020-09-30
Value50
Percentage of LineOfCredit100.0

kn:CreditFacilitydueOctober112022, us-gaap:LineOfCredit


Line
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value501001000.00.019199.040505050
Percentage of LineOfCredit100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

kn:CreditFacilitydueOctober112022, us-gaap:LineOfCredit


Long
Period End2020-09-30
Value50
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-09-30
Value172
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:LongTermLineOfCredit us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermLineOfCredit

kn:CreditFacilityDueJanuary22024, us-gaap:LineOfCredit


Long
Period End2020-09-30
Value50
Percentage of LongTermLineOfCredit100.0

us-gaap:LongtermDebtWeightedAverageInterestRate us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:LongtermDebtWeightedAverageInterestRate

kn:CreditFacilities, us-gaap:LondonInterbankOfferedRateLIBOR


Longterm
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2.20.03980.03560.03580.03230.02320.0171
Percentage of LongtermDebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value4.24.3
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2427303412874
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1413379314310396371
Percentage of OperatingLossCarryforwards59.647.41231.5918.7242.2533.90.0

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:OtherSundryLiabilitiesNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5100000.01700000.03500000.04200000.04400000.05800000.02400000.01900000.0
Percentage of OtherSundryLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value200000.0500000.0900000.0200000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrual


Product
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.40.90.52.12.03.7153.83.4
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualClassifiedCurrent

us-gaap:ProductWarrantyAccrualClassifiedCurrent


Product
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.40.90.52.12.03.7153.7
Percentage of ProductWarrantyAccrualClassifiedCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1.01.72.64.46.72.21.41.21.32.01.10.90.92.95.15.57.47.73.83.61010.0107.37.88.51315214.7175.5343.00.1
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve us-gaap:BalanceSheetLocation

kn:OtherAccruedExpenses


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1.01.72.44.06.11.81.41.21.32.00.90.70.72.74.85.27.27.53.63.4109.9106.97.88.113145.534
Percentage of RestructuringReserve100.0100.092.390.991.081.8100.0100.0100.0100.081.877.877.893.194.194.597.397.494.794.497.299.099.194.5100.095.393.591.9100.0

us-gaap:OtherLiabilities


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value0.20.40.60.40.00.00.00.00.20.20.20.20.30.30.20.20.20.20.30.10.10.40.00.40.91.2641.8370.0
Percentage of RestructuringReserve7.79.19.018.20.00.00.00.018.222.222.26.95.95.52.72.65.35.62.81.00.95.50.04.76.58.18.50.0

us-gaap:RestructuringReserve us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value0.71.21.93.55.62.11.41.21.32.00.80.60.62.64.75.15.67.33.43.29.69.49.15.15.86.21011164.2035.02.50.0
Percentage of RestructuringReserve70.070.673.179.583.695.5100.0100.0100.0100.072.766.766.789.792.292.775.794.889.588.990.694.084.369.974.472.978.475.076.589.190.483.30.0

us-gaap:FacilityClosing


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value0.30.50.70.91.10.10.00.00.00.00.30.30.30.30.40.41.80.40.40.41.00.61.72.22.02.33.03.9065.0520.5140.5340.50.1
Percentage of RestructuringReserve30.029.426.920.516.44.50.00.00.00.027.333.333.310.37.87.324.35.210.511.19.46.015.730.125.627.121.625.023.510.99.616.7100.0

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveCurrent


Restructuring
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2.41.40.94.83.610135.5
Percentage of RestructuringReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserveNoncurrent

us-gaap:RestructuringReserveNoncurrent


Restructuring
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value200000.00200000.0300000.0200000.0100000.0900000.00
Percentage of RestructuringReserveNoncurrent100.00.0100.0100.0100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value21.2721.2716.0416.0416.0116.0815.915.715.715.6114.2714.2714.2714.2615.3215.3215.415.40
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value18.6118.2316.1416.1616.1916.3515.9915.8915.815.5715.1215.1515.0515.1816.5416.5516.716.3414.9414.9315.2316.2324.4121.3523.2123.6328.4128.5728.5628.560
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue87.585.7100.6100.7101.1101.7100.6101.2100.699.7106.0106.2105.5106.5108.0108.0108.4106.10.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value14.9214.9917.8617.92
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value1621125.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value1924155.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:TaxCreditCarryforward

us-gaap:TaxCreditCarryforwardAmount

kn:ForeignTaxCreditCarryforward


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1716143.31.43.83.5
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0100.0100.0100.0100.0

kn:StateTaxCreditCarryforward


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1918161311102.2
Percentage of TaxCreditCarryforwardAmount111.9109.0115.1418.2828.6271.162.9

us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2422187.7119.81.0
Percentage of TaxCreditCarryforwardAmount140.3132.9128.1233.3828.6257.928.6

us-gaap:TaxCreditCarryforwardAmount us-gaap:TaxCreditCarryforward, us-gaap:TaxPeriod

kn:StateTaxCreditCarryforward, kn:AfterTaxYear2034MemberDomain


Tax
Period End2020-12-312019-12-312018-12-31
Value171614
Percentage of TaxCreditCarryforwardAmount98.396.498.6

kn:StateTaxCreditCarryforward, kn:TaxYear2019ThroughTaxYear2034MemberDomain


Tax
Period End2020-12-312019-12-312018-12-31
Value2.42.12.4
Percentage of TaxCreditCarryforwardAmount13.612.616.4

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value1000
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-31
Value300000.0300000.0300000.0200000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-31
Value1500000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.60.80.60.71.51.5
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowanceOfDeferredTaxAssets


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value98851319916118880717464
Percentage of ValuationAllowancesAndReservesBalance6125.010662.521866.714242.910753.312586.70.00.00.00.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:Revenues
us-gaap:StatementGeographical
(None,)
Revenuesus-gaap: Statement Geographical
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:NoncurrentAssets
us-gaap:StatementGeographical
(None,)
Noncurrent Assetsus-gaap: Statement Geographical
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:Goodwill
us-gaap:ReportingUnit
(None,)
Goodwillus-gaap: Reporting Unit
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
Accumulated Other Comprehensive Income Loss Net Of Taxus-gaap: Statement Equity Components