KNL


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

Table of contents



us-gaap:CommonStockValue

us-gaap:SharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AwardType

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GrossProfit

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

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

us-gaap:InterestExpense

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

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

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

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

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:ReportingUnit
us-gaap:StatementBusinessSegments
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

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

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

knl:AccountsReceivableAllowanceRecoveryOfBadDebtsAndOther

knl:AccountsReceivableCreditLossExpenseOther

knl:Baddebtandcustomercredits
dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType
knl:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableCashPaidPerAcquirerShare
dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType
knl:BusinessCombinationModificationOfAcquireeShareBasedCompensationAwardsPerformanceMeasurementAchievementPercentage
us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:SubsequentEventType
knl:BusinessCombinationPotentialTerminationFee
us-gaap:AwardType
knl:CumulativePerformanceTargetIncreaseDecreasePercentage
us-gaap:DerivativeInstrumentRisk
knl:DerivativeLiabilityDecreaseInNotionalAmount

knl:NonCashRestructuringCharges

knl:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentDueToLongTermIntercompanyNotesNetOfTax

knl:RestructuringAndOtherCharges

knl:ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketBasedRestrictedStockUnitsAmendedTermsReductionOfNumberSharesEarnedPercentage
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityBeneficialOwnershipRequirement
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityChangeInControlRedemptionPricePercentage
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityCommonStockVolumeWeightedAveragePricePerShareCompanyConversionElectionThreshold
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityConversionPriceAfterEightAnniversary
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityConversionPriceAfterSeventhAnniversary
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityConversionPriceAfterSixthAnniversary
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
knl:TemporaryEquityDividendRatePercentage
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
knl:TemporaryEquityDividendsShares

us-gaap:AssetImpairmentCharges

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
us-gaap:BusinessAcquisition

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:DebtInstrumentPeriodicPayment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStockCash
us-gaap:StatementClassOfStock
us-gaap:DividendsPreferredStockCash
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfLeasehold

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:InventoryWriteDown

us-gaap:OperatingLeaseImpairmentLoss

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentForContingentConsiderationLiabilityInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForRestructuring
us-gaap:RestructuringCostAndReserve

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PensionExpenseReversalOfExpenseNoncash
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:ProceedsFromIssuanceOfConvertiblePreferredStock
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

us-gaap:ProceedsFromLinesOfCredit
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualWarrantiesIssued

us-gaap:ProductWarrantyExpense

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated
us-gaap:SubsequentEventType

us-gaap:RestructuringCharges
us-gaap:IncomeStatementLocation
us-gaap:IncomeStatementLocation, us-gaap:RestructuringCostAndReserve
us-gaap:StatementBusinessSegments
us-gaap:StatementScenario, us-gaap:RestructuringCostAndReserve, us-gaap:SubsequentEventType

us-gaap:RestructuringReserveAccrualAdjustment1
us-gaap:RestructuringCostAndReserve
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:SaleOfStockConsiderationReceivedOnTransaction
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

knl:DeferredTaxAssetOperatingLeaseLiabilities

knl:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesAndOther

knl:DeferredTaxLiabilitiesRightOfUseAssets

knl:DefinedBenefitPlanBenefitObligationHealthCareCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanBenefitObligationHealthCareCostUltimateTrendRate

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostUltimateTrendRate

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostUltimateTrendRate

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostUltimateTrendRate

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementDiscountRate

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementRoyaltyRate
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
knl:IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount
us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

knl:LesseeOperatingLeaseLeaseNotYetCommencedLiability

knl:LesseeOperatingLeaseLeaseNotYetCommencedRightOfUseAsset
us-gaap:RetirementPlanType
knl:LiabilityDefinedBenefitPlanOtherNoncurrent

knl:OperatingLeaseRightOfUseAssetFairValue

knl:RestructuringAndRelatedCostExpectedCostToBePaidWithinNextTwelveMonths

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:BusinessAcquisition, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput
us-gaap:BalanceSheetLocation
us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CashEquivalentsAtCarryingValue

us-gaap:ContractWithCustomerLiability

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

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:Range, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:RetirementPlanType
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityNotionalAmount

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityFairValueOfAmountOutstanding
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

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

us-gaap:OtherLongTermDebtCurrent

us-gaap:OtherSundryLiabilitiesCurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PrepaidExpenseCurrent

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrualClassifiedCurrent
us-gaap:ReportingUnit
us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount

us-gaap:RestructuringAndRelatedCostExpectedCost1

us-gaap:RestructuringAndRelatedCostExpectedCostRemaining1

us-gaap:RestructuringReserve
us-gaap:RestructuringCostAndReserve
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:SaleOfStockPricePerShare
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:TemporaryEquityCarryingAmountAttributableToParent
us-gaap:StatementClassOfStock
us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:TemporaryEquityLiquidationPreferencePerShare
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:TemporaryEquityRedemptionPricePerShare

us-gaap:TemporaryEquitySharesIssued

us-gaap:TemporaryEquitySharesOutstanding
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
InventoryNet
Inventory Work In Process Net Of Reserves

Tables

  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▄▄▄▄▄▄0.50.50.50.50.50.5NA0.50.50.4940.495NANA0.4930.4930.4930.4940.4910.4910.491NA0.4880.4880.4880.4890.4870.487NA0.4840.4830.482NA0.4820.4790.4790.4790.4790.477NA0.478NA0.47NANANA
us-gaap:SharesOutstanding NA50.645NA50.71849.06348.879NA48.86448.84548.70592648.69495348694.048607.048.497942NANANA48.102328NANANA47.828079NANANA47.48751NANANA47.059458NANANA46.774573NANANA46.362147NANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 49.264NA49.44149.08449.708NA49.57449.31436449.190288NA49.23149.13110649.204776NA48.97949.37650649.383NA48.84555348.66431848.594NA48.48762348.50954648.353047NA48.07263247.97455948.048994NA47.679422NA47.572486NA47.03878547.0174447.09599NA46.79222546.90401546.874899NANA46.0413NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 49.264NA49.11249.08448.973NA48.87348.85506448.775NA48.69443848.67214448.556686NA48.46848.46460548.456225NA48.05383648.01873347.904593NA47.76446247.76096147.647961NA47.37660547.3657847.200099NA46.91566NA46.833216NA46.66735946.62089746.496144NA46.25036246.24577646.160748NANA45.631958NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 10.6NA8.01.20.11NANA0.00.11NA0.0010.00.001NA0.0340.00.012NA0.0080.00.0NA0.00.00.0NA0.1240.1380.164NA0.164NA0.164NA0.6060.6060.262NA0.227NANANANANANA
us-gaap:EarningsPerShareBasic ▂▂▃▁▄▄▆▆▆▇▆▅▅█▆▅▅▆▆▆▆▅▆▆▆▅▅▄▄▃▄▄▄▆▅▅▄▆▆▅▄▅▄▄▃-0.08-0.050000000000000020.11-0.20.220.210.360.440.370.50.420.270.310.670.390.270.320.450.450.440.360.280.370.360.370.260.330.230.170.020.180.170.130.370.260.280.160.380.40.280.20.240.140.190.05
us-gaap:EarningsPerShareDiluted ▂▂▃▁▄▄▅▆▆▇▆▅▅█▆▅▅▆▆▆▆▅▆▆▆▅▅▄▄▃▄▄▄▆▅▅▄▆▆▅▄▄▄▄▃-0.08-0.050000000000000020.11-0.20.220.210.350.440.370.50.410.270.310.670.390.260.310.440.440.440.360.280.370.360.360.260.330.230.170.020.180.160.130.370.260.280.150.370.390.280.20.230.140.190.05
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,knl:LifestyleSegmentNANA2.22.22.3NA2.22.62.5NANA3.12.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,knl:OfficeSegmentNANANA0.10.3NA0.60.50.40.1860.4490.50.50.2750.3320.450.2740.6330.4660.4880.581NANA0.415NANANANANANANANANANANANANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▃▄▅▁▄▇██▇█▇▆▆▄▇▆▆███▇▆▇▇▆▅▆▆▄▃▅▄▄▇▆▆▅▇▆2.36.919.3-10.111.430.036.733.929.235.00132.9224.822.512.5830.12522.2323.03435.78235.20333.47431.84921.85228.70428.25522.29919.50723.31522.23811.8251.80617.05112.60510.29428.12523.52220.80315.45227.81625.015NANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▃▆▇▃▂▇▄▆▅▄▆▅▅▇▇▆▆▅▆▇▆▆▆▆▄▁▅▆▄█▅-6.221.024.2-0.9-13.027.03.521.714.47.10420.86110.914.524.04624.89815.14215.73911.93219.70122.73421.59818.2418.50718.7395.826-18.5418.22914.6494.43132.96913.51NA4.5055.03916.7837.8999.9045.2669.7316.38815.284NANANANA
us-gaap:CostOfGoodsAndServicesSold ▄▆▆▄▇█▇█▇█▆▆▅▆▅▄▃▅▄▅▄▅▃▄▄▅▄▄▂▃▂▂▁▄▂▂▁▂▃▃▂168.5201.6196.0178.4217.7227.4216.1226.6209.0222.893204.943204.2188.9203.785184.646168.736161.146181.519179.296180.636176.865191.309162.381167.431171.189183.825173.335168.669152.856156.221144.559144.431136.959167.351145.578146.611133.609152.497160.692162.157152.457NANA129.235NA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA-0.2NANA0.0-0.40.00.00.0-0.0450.0-1.40.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▄▅▆▄▆███▆▇▆▆▅▅▅▄▄▅▅▆▅▆▅▅▄▅▄▄▃▂▂▂▂▃▂▂▂▂▃▃▂▃▂▂▁95.7111.3113.495.7122.3144.1140.4140.7123.8131.732122.794119.287107.711112.337106.6199.95895.674111.347112.801114.064107.764114.425101.207101.19195.309102.8594.96297.27476.47574.23572.33969.88163.62782.67574.21674.40763.05370.6578.85176.49368.40177.19667.45263.0456.661
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▃▃▅▁▄▅▆▇▇█▇▆▆▅▇▆▆███▇▆▇▇▇▆▇▆▅▄▅▅▅▇▆▆▅▇▇▆▅-1.71.514.2-15.87.014.023.528.924.531.98627.48717.721.09.97527.31920.14221.1634.63933.22631.98227.69120.83328.81126.20427.57120.8324.7117.59412.6582.51813.34313.29410.0927.06119.10120.42811.74626.71327.86619.67814.569NANA9.848NA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest▆▆▆▇█▁▂▇▇-1.9-2.4-1.7-0.91.0-10.7-9.8-0.50.1NANA-4.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▅▆▇▄▅▆▇▇▇▇▇▆▇▁▇▇▇███▇▇█▇▇▇▇▇▆▆▆▆▆▇▇▇▆▇▇▇▆0.22.17.2-6.2-3.93.66.07.26.57.4447.1644.65.7-22.7048.1587.1825.76413.19511.60810.67810.287.40310.958.98210.1368.8999.0886.7534.4661.7724.7935.4814.0169.5696.9047.3734.4899.2689.4776.7035.367NANA1.172NA
us-gaap:InterestExpense ▄▅▆▇▇████▇▇█▆▂▂▂▂▁▁▁▂▂▂▂▂▂▂▂▂▁▂▂▂▂▂▂▂▁▁▅▆3.03.84.14.64.95.55.55.55.25.0995.0325.34.11.9621.9911.8591.6711.2481.2961.3071.5541.4791.651.8511.8851.8641.8991.9441.6711.4451.4841.5171.4951.5721.6351.6371.5061.1381.2263.3724.017NANA4.41NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁▂█-3.8-2.55.6NA10.910.417.5NANANANANANANANA12.93815.40421.44221.60721.29817.413.44817.86117.22217.43512.28815.62210.8558.1920.7468.557.8136.07417.49212.19713.0557.25717.44318.38912.9759.20210.7936.348.6762.215
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted -3.8NA5.6NA10.9NA17.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▄▄▄▃▅▃▆▅▅▆▄▇█▃▃▄▄▄▃▄▁▄▆▄0.60.20.5-0.31.2-0.299999999999999542.51.00.72.5830.2272.84.0-0.643-0.815-0.229-0.2030.105-0.681-0.185-2.6040.461.757-0.2NANA3.294-2.72.5042.157-2.2242.2061.291NANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▃▄▅▁▄▇██▇█▇▆▆▄▇▆▆███▇▆▇▇▆▅▆▆▄▃▅▄▄▇▆▆▅▇▆▆▆2.36.919.3-10.111.430.036.733.929.235.00132.9224.822.512.5830.12522.2323.03435.78235.20333.47431.84921.85228.70428.25522.29919.50723.31522.23811.8251.80617.05112.60510.29428.12523.52220.80315.45227.81625.01523.32520.914NANA11.94NA
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ███▇▁█▆▃▅1.11.11.20.4-4.61.1-0.4-2.8-1.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄█▇▆▁-4.321.617.28.7-23.9NANA0.0-3.6-17.479NANANA-8.6625.7372.1820.343NANANANANA0.6741.5-11.617NA-7.4243.794-3.755NA4.96NA-1.569NANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes▁██▆▄-8.88.57.53.6-1.6NANA2.0-4.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest█▇▆▅▁7.24.33.10.8-8.4NANA0.40.1-6.462NANANA-8.386-0.139-0.138-0.137NA-0.136NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges███▇▁1.11.11.20.4-4.6NANA-2.8-1.5-3.164NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment-3.8NANA3.9-9.3NANA0.41.90.247NANANA-0.2765.8762.320.48NA-1.781NANANA-4.2280.118-12.999NANANA-3.819NANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▂▂▄▁▄▄▅▆▆▇▆▅▅█▆▅▅▆▆-1.9-0.6000000000000017.0-9.610.910.317.521.718.024.54220.32313.12315.26732.67919.16112.9615.39621.44421.618NANA13.4317.86117.22217.43511.93115.98110.4818.1920.672NANANANANANANANANA12.975NANANA8.676NA
 us-gaap:ProfitLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest▆▆▆▇█▁▂▇▇-1.5-1.7-1.3-0.70.8-7.9-7.1-0.30.1NANA-3.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent-1.9NA7.0-9.610.9NA17.521.718.024.542NA13.115.332.69319.13212.93415.40421.44222.086NANA13.44817.83317.23917.44311.903NANA8.186NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-1.9NA7.0-9.610.9NA17.521.718.024.542NA13.115.332.69319.13212.93415.40421.44222.086NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆▇▇▆▇███▇█▇▇▇▇▆▆▆▇▁▇▆▇▁▁▁▆▁▁▁▅▁▅▅▆▅▅▅▅▅▅▅▅▅▅▄264.2312.9309.4274.1340.0371.5356.5367.3332.8354.625327.737323.351296.559316.122291.256268.694256.82292.8663.793294.7284.629305.7343.4953.4383.791286.4534.854.8334.398230.4564.839214.312200.586250.026219.794221.018196.662223.148239.543238.65220.858239.784202.149192.275175.259
us-gaap:Revenues ▆▇▇▆▇███▇█▇▇▇▇▆▆▆▇▁▇▆▇▁▁▁▆▁▁▁▅▁▅▅▆▅▅▅▅▅▅▅▅▅▅▄264.2312.9309.4274.1340.0371.5356.5367.3332.8354.625327.737323.351296.559316.122291.256268.694256.82292.8663.793294.7284.629305.7343.4953.4383.791286.4534.854.8334.398230.4564.839214.312200.586250.026219.794221.018196.662223.148239.543238.65220.858239.784202.149192.275175.259
us-gaap:SellingGeneralAndAdministrativeExpense ▆▇▆▅████▇▇▆▆▅▅▄▄▄▄▅▅▄▅▄▄▄▄▄▄▃▂▂▂▂▂▁▂▁▁▂▂▁89.896.690.884.8103.3107.0103.6106.894.596.68188.67493.684.781.28976.48575.57872.6475.56577.59880.5975.91581.46872.06272.93673.0175.69971.64774.83364.6558.42555.28857.27653.33354.5550.69453.60447.60148.2853.85452.92547.016NANA48.953NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▆▆▃▁█▁1451.31453.11389.61361.41496.31357.9NA1333.51314.11226.9491212.288NANA861.041875.192864.648856.579858.613849.055849.0NA856.085842.26851.366869.893868.943837.867NA804.43677.334673.37NA664.656695.053668.784664.812676.256688.091NA678.356NA687.432NANANA
us-gaap:Liabilities ▂▂▁▅█▄847.9840.2798.7956.71092.6930.3NA925.1921.3840.439827.232NANA502.312535.083544.322545.402549.144546.331561.066NA600.611599.292622.575657.04655.725598.157NA580.233448.892472.713NA474.995506.953479.712488.73505.887522.668NA522.441NA561.046NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▆▆▃▁█▁1451.31453.11389.61361.41496.31357.9NA1333.51314.11226.9491212.288NANA861.041875.192864.648856.579858.613849.055849.0NA856.085842.26851.366869.893868.943837.867NA804.43677.334673.37NA664.656695.053668.784664.812676.256688.091NA678.356NA687.432NANANA
us-gaap:StockholdersEquity ▆█▅▁▁▅436.5447.8427.8404.7403.7427.6NA408.4392.8386.304384.798NANA358.478339.844320.09310.963309.247302.504287.725NA255.282242.758228.609212.654213.011239.531NA223.973228.442200.657NA189.661188.1189.072176.082170.369165.423NANANA126.386NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▁▂▂▁█▁348.0364.8356.5344.4490.5340.6NA337.4324.3331.615322.641NANA278.27282.609276.52272.227276.808287.476299.345NA308.772288.89297.582318.053311.819282.385NA263.147236.199228.541NA225.856258.522237.676235.059245.207264.893NA251.915NA261.16NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▃▁▁█▁10.837.314.57.8130.68.5NA2.92.41.567.317NANA2.2035.8335.9243.0359.85411.1873.5485.3484.1929.75710.34214.67519.02115.78.4739.13412.02613.513NA12.70129.95610.6911.47311.74828.26310.73813.4814.5926.935NA10.418NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▁▃▂▁█▁▁▁▁▁10.837.314.57.8130.68.58.32.92.41.6NA1.416.22.2NANANA9.9NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▁▂▄▄█▇77.683.491.791.7114.2107.4NA118.8109.1120.157110.814NANA86.68791.8977.76283.08184.42583.25899.383NA116.53293.145104.374121.721114.55194.565NA95.703104.17190.511NA89.935105.87799.631103.414114.214126.078NA124.137NA126.78NANANA
us-gaap:InventoryNet █▁▇▆▇▂206.5193.1205.4202.7203.9195.9NA182.0177.2170.549170.42NANA144.945149.026150.076146.2142.072146.1146.475NA140.798148.509143.44144.786140.835138.728138.728127.21896.44994.102NA96.81798.195101.94196.75798.38389.244NA91.611NA85.216NANANA
us-gaap:OtherAssetsCurrent █▁40.837.3NA15.311.411.6NA12.614.513.72514.73NANA15.16310.69113.95712.4812.996NANANA11.967NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent NANA44.9NANA28.8NANANANANANANANANANANANA28.39929.541NA26.76522.68924.41122.03321.54422.158NA19.66412.14516.349NA12.35111.43314.74512.74810.15810.62NANANA11.722NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross NA514.2NANANA520.6NANANA493.334NANANA469.94NANANA445.821NANANA404.606NANANA405.264NANANA391.726NANANA378.392NANANA367.218NANANA362.975NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovementsNA55.8NANANA71.9NANANA68.852NANANA67.465NANANA63.749NANANA63.122NANANA66.262NANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNA39.3NANANA35.0NANANA52.73NANANA32.481NANANA55.89NANANA32.967NANANA23.684NANANA18.683NANANA11.886NANANA11.623NANANA4.42NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndBuildingNA12.9NANANA16.0NANANA11.985NANANA12.489NANANA11.93NANANA11.826NANANA120.165NANANA117.653NANANA108.841NANANA106.891NANANA105.272NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNA67.9NANANA62.9NANANA59.604NANANA54.995NANANA46.125NANANA41.897NANANA40.765NANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:MachineryAndEquipmentNA230.7NANANA236.4NANANA237.194NANANA243.939NANANA232.777NANANA226.198NANANA261.415NANANA255.39NANANA257.665NANANA248.704NANANA253.283NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:OfficeEquipmentNA33.3NANANA27.2NANANA19.533NANANA18.193NANANA35.35NANANA28.596NANANA26.095NANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCostsNA74.3NANANA71.2NANANA43.436NANANA40.378NANANA20.91NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NA277.1NANANA281.6NANANA278.381NANANA269.31NANANA248.737NANANA232.464NANANA240.245NANANA253.833NANANA253.554NANANA245.426NANANA240.756NANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▂▂▁█236.9237.1227.6226.0224.9239.0NA221.8215.8214.953203.781NANA200.63209.566204.693200.371197.084184.69179.872NA172.142166.013164.649161.901165.019162.228NA147.469137.893133.281NA127.285124.838121.715120.33122.27121.792NA123.66NA122.219NANANA
us-gaap:Goodwill ▅█▅▂▁▂341.1349.8340.3332.4328.0332.1NA319.7317.1320.759323.085NANA142.113142.158141.759141.471141.391134.241128.142NA127.671127.916128.379128.278128.918128.684NA125.82279.95180.25NA80.35580.33280.66780.3482.17276.571NA76.383NA76.101NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass knl:TradeNameDatesWeiserNA2.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass knl:TradeNameHollyHuntNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass knl:TradeNameKnollNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass knl:TradenameMuutoNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNamesNA278.4NANANA277.6NANANANA287.073NANA225.6NANANANANANANANANANANANANANANA17.226.1NANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁█▇▄▄█340.1347.9346.6343.7343.4348.2NA350.1349.9353.946358.71NANA238.581239.403240.226241.048241.87239.742238.565NA240.169251.641252.451252.944253.739254.539NA259.885214.695222.203NA222.583222.498222.709222.674219.735220.679NA221.205NA222.246NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass knl:VariousIntangibleAssetsNA18.2NANANA16.7NANANA2.4922.519NANA2.059NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationshipsNA51.3NANANA53.9NANANA59.96463.071NANA10.922NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset █▅▃▂▂▁181.8150.0116.2112.6107.194.4NA94.497.70.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇▇▂▁▂█3.43.52.42.32.43.6NA10.19.31.4314.071NANA1.4471.4561.4231.4361.4341.091.11NA5.0774.9885.3555.5966.176.231NA4.0074.3464.637NA4.9525.1633.4023.6293.9270.908NA1.164NA1.199NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▃▃▁▂▆█103.7101.191.297.4122.3131.9NA131.7118.2126.748118.272NANA108.922103.57399.88589.92397.51881.91380.289NA89.55267.18375.73882.401114.91497.477NA94.27991.37875.84NA67.78183.673.5765.84578.19983.824NA86.369NA101.206NANANA
us-gaap:ContractWithCustomerLiabilityCurrent NA33.8NANANA32.5NANANA37.740.6NANA30.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▆▂▂▁▅█276.0256.4257.1250.5274.8290.0NA293.8274.7272.778251.697NANA223.08215.217204.872194.37222.373209.06195.915NA216.04178.721182.021192.317231.774209.581NA177.879168.303145.438NA143.17175.945148.159142.461150.293183.128NA164.05NA191.918NANANA
us-gaap:LongTermDebtCurrent ▁▁▁███14.514.614.517.117.017.1NA17.117.117.18517.242NANA10.010.010.010.010.010.010.0NA10.010.010.010.010.010.0NANA0.0NANANANANANANANANA0.15NA0.135NANANA
us-gaap:OperatingLeaseLiabilityCurrent █▆▆▅▄▁29.827.226.826.424.920.7NA21.121.10.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent █▂▇▁▁▅128.0113.5124.6109.6110.6120.3NA123.9118.3128.845114.321NANA104.158101.60394.95594.403114.774117.147105.626NA114.908101.53896.28388.48493.96591.679NA82.32576.67667.635NA74.46886.01874.02774.50169.80184.679NA68.645NA85.054NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebtNoncurrent ▁▂▂▅█▄269.3295.2294.0462.4589.3428.9NA430.2444.3443.898463.075NANA181.048208.882223.716232.549208.383183.217198.051NA212.0247.5264.0290.0248.0251.5NA268.0173.0183.0NA193.0193.0203.0218.0228.0212.0NA230.0NA245.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▂▁▁▅96.093.980.277.577.187.5NANANA86.585.644NANA54.671NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:PensionPlansDefinedBenefitNA24.2NANANA22.0NANANA13.93NANANA21.671NANANA17.166NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▃███▃▁18.329.329.329.419.214.9NA13.28.520.03523.955NANA18.26716.94317.30317.77718.98220.38120.784NA26.87726.02726.3326.86632.21330.957NA29.38217.39615.543NA8.93211.7858.6728.7646.8586.778NA6.688NA7.218NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent █▅▃▂▂▁173.1141.2107.7104.398.787.0NA87.190.70.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NA30.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NA27.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NA24.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NA18.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NA59.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▆█▅▁▁▅436.5447.8427.8404.7403.7427.6NA408.4392.8386.304384.798NANA358.478339.844320.09310.963309.247302.504287.725NA255.282242.758228.609212.654213.011239.531NA223.973228.442200.657NA189.661188.1189.072176.082170.369165.423NANANA126.386NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest NA447.8NANA403.7427.6406.1408.4392.8386.51385.056369.1366.4358.729340.109320.326311.177309.469302.724287.934NA255.474242.968228.791212.853213.218239.71NA224.197228.442NANANA182.314NANANA158.63NA155.915NA126.386NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital██▇▆▅▆▅▄▄▄▃▃▃▃▂▁▁▃▂▂75.275.471.567.764.466.863.760.958.458.7756.84854.654.954.45552.46650.1748.66755.14852.88650.635NA47.165NANANA41.143NANANA37.258NANANA27.751NANANA23.631NANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:CommonStock█████████▃▄██▃▃▃▃▁▁▁0.50.50.50.50.50.50.50.50.50.4940.4950.50.50.4930.4930.4930.4940.4910.4910.491NA0.488NANANA0.487NANANA0.483NANANA0.479NANANA0.477NANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:Parent██▇▆▆▇▆▆▆▅▅▅▄▄▃▂▂▂▂▁436.5447.8427.8404.7403.7427.6406.1408.4392.8386.304384.798368.8366.1358.478339.844320.09310.963309.247302.504287.725NA255.282242.758228.609212.654213.011239.531NA223.973228.442NANANA182.314NANANA158.63NANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▇▇█████▇▇▆▆▅▅▄▃▃▃▂▂▁410.9417.7423.2421.1432.1429.7427.9419.0405.9395.434379.9366.7361.5347.304322.026310.305304.862297.011283.018268.573NA244.947NANANA204.063NANANA180.949NANANA180.862NANANA150.408NANANANANANANA
us-gaap:CommonStockValue ▄▄▄▄▄▄0.50.50.50.50.50.5NA0.50.50.4940.495NANA0.4930.4930.4930.4940.4910.4910.491NA0.4880.4880.4880.4890.4870.487NA0.4840.4830.482NA0.4820.4790.4790.4790.4790.477NA0.478NA0.47NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ██▆▃▁▃75.275.471.567.764.466.8NA60.958.458.7756.848NANA54.45552.46650.1748.66755.14852.88650.635NA47.16545.49843.99640.9441.14338.62NA34.15837.25835.51NA30.5927.75128.02326.07323.46523.631NA19.587NA14.087NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▃▅▄█▇410.9417.7423.2421.1432.1429.7NA419.0405.9395.434379.9NANA347.304322.026310.305304.862297.011283.018268.573NA244.947238.897226.924215.524204.063201.908NA187.184184.799189.927NA185.038184.75172.996166.542158.281155.818NA129.516NA114.99NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇█▅▂▁▅-50.1-45.8-67.4-84.6-93.3-69.4NA-72.0-72.0-68.394-52.445NANA-43.774-35.141-40.878-43.06-43.403-33.891-31.974NA-37.318-42.125-42.799-44.299-32.682-1.484NA2.1475.902-25.262NA-26.449-24.88-12.426-17.012-11.856-14.503NA6.334NA-3.161NANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅█▆▄▁██▇▅█▆▆▄█14.641.329.95.9-16.440.142.236.819.144.41330.09528.15.644.33NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████▇█████▁█-9.1-15.4-7.32.1-10.3-17.4-41.4-12.7-9.2-18.94-9.232-7.9-312.2-11.154NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▁▅▃▃▃▃▃▃▂█▂-31.6-5.0-16.2-131.0149.1-22.74.7-23.6-9.1-20.013-23.583-37.0320.4-35.548NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▅▅▁█▅▅▅▅-26.522.86.7-122.8122.10.25.40.50.8NANA-14.814.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▄█▄▄▁0.69.90.70.0-6.3NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▄▄10.710.7NANA11.110.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInAccountsPayable ▆▇▄▂▄▆▄▇▄▆▅▆▅▆▆▇▅▇▆▄▆█▄▄▁█▆▆▅█3.88.1-8.8-23.0-6.83.6-9.311.8-7.56.284-1.6298.0-0.22.6183.48711.12-5.10512.7771.923-11.4081.29918.228-8.082-7.081-29.31817.9561.8723.538-0.36415.85NANA-16.0469.7547.153-9.802-7.6685.541-6.865-10.379-5.992NANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▄▃▄▁▆▄▃▆▃▆▅▅▅▄▇▃▄▅▂▃▃█▃▂▆█▃▆▃▆-5.4-9.2-1.0-22.49.4-4.9-7.711.0-11.410.2713.2065.26.3-0.28914.209-6.544-1.8762.406-12.781-7.646-8.5724.171-10.631-17.8028.55421.463-9.7939.281-9.72712.804NANA-15.7416.116-4.218-9.954-12.075-3.9247.077-15.55411.41NANANANA
us-gaap:IncreaseDecreaseInInventories █▁▅▄▇▅▆▅▆▄▅▅▇▃▄▅▅▃▄▄▆▃▅▄▆▅▆▅▆▅15.1-12.22.3-0.610.23.35.84.77.1-0.0012.5744.09.6-3.566-1.24.0464.765-4.650.397-0.9387.348-5.7225.122-0.6265.7072.7078.273.7916.5342.92NANA-1.223-3.8634.664-0.5767.287-4.3553.186-1.5136.84NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅█▆▄▁██▇▅█▆▆▄█14.641.329.95.9-16.440.142.236.819.144.41330.09528.15.644.33NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▂▂▄▁▄▄▅▆▆▇▆▅▅█▆▅▅▆▆-1.9-0.6000000000000017.0-9.610.910.317.521.718.024.54220.32313.12315.26732.67919.16112.9615.39621.44421.618NANA13.4317.86117.22217.43511.93115.98110.4818.1920.672NANANANANANANANANA12.975NANANA8.676NA
 us-gaap:ProfitLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest▆▆▆▇█▁▂▇▇-1.5-1.7-1.3-0.70.8-7.9-7.1-0.30.1NANA-3.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent-1.9NA7.0-9.610.9NA17.521.718.024.542NA13.115.332.69319.13212.93415.40421.44222.086NANA13.44817.83317.23917.44311.903NANA8.186NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-1.9NA7.0-9.610.9NA17.521.718.024.542NA13.115.332.69319.13212.93415.40421.44222.086NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ██▇▆▂▅▅▄▃▄▃▃▄▃▃▂▆▆▄▄▃▄▃▃▁▃▃▂▂▄4.24.13.93.31.63.13.12.42.22.4732.2382.12.42.3442.2711.6993.3443.2232.6542.4542.1382.5162.0762.1891.3852.1932.2111.9841.6742.462NANA2.8232.5152.4832.7262.6322.5392.262.7112.161NANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████▇█████▁█-9.1-15.4-7.32.1-10.3-17.4-41.4-12.7-9.2-18.94-9.232-7.9-312.2-11.154NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquireProductiveAssets 8.9NA7.310.110.717.510.512.79.218.945.3497.58.511.1548.67710.10610.6514.66310.3858.047.01710.1037.1677.4764.8649.59414.2519.9277.8148.578NANA6.6266.4573.6153.4493.0245.5922.4635.151.97NANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▁▅▃▃▃▃▃▃▂█▂-31.6-5.0-16.2-131.0149.1-22.74.7-23.6-9.1-20.013-23.583-37.0320.4-35.548NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▃▃▄▃▃▃▃▃▃▁▄▃█▂3.63.700000000000007353.74.34.24.34.24.34.3-46.21252.3496.8165.0-7.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ▃▂▂▁█▇▇▇▇▆▆▇▇▆▆▆█▆▆▇▆▆▅▅▅▅▅▅▅▅3.63.03.02.08.98.38.48.37.87.2577.3277.77.77.1937.2717.3028.4277.2717.2197.5317.1967.175.6925.7735.7295.7275.6525.6845.6795.641NANA5.6295.6125.6024.6624.6614.6364.6254.6252.772NANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0494000.0495000.0493000.0493000.0493000.0494000.0491000.0491000.0491000.0488000.0488000.0488000.0489000.0487000.0487000.0484000.0483000.0482000.0482000.0479000.0479000.0479000.0479000.0477000.0478000.0470000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Shares Outstanding

us-gaap:SharesOutstanding

us-gaap:SharesOutstanding


Shares
Period End2020-12-312020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value5050494848484848486944860748484747474646
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-06-30
Value49494949494949494949484949484848484848484748474747474746464646
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-06-30
Value49494948484848484848484848484847474747474747464646464646464645
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value108.01.20.110.00.110.0010.00.0010.0340.00.0120.0080.00.00.00.00.00.1240.1380.1640.1640.1640.6060.6060.2620.227
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AwardType

knl:CommonStockRestrictedStockAndRestrictedStockUnits


Antidilutive
Period End2021-03-312020-09-30
Value0.60.4
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount5.75.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.08-0.050.11-0.20.220.210.360.440.370.50.420.270.310.670.390.270.320.450.450.440.360.280.370.360.370.260.330.230.170.020.180.170.130.370.260.280.160.380.40.280.20.240.140.190.05
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.08-0.050.11-0.20.220.210.350.440.370.50.410.270.310.670.390.260.310.440.440.440.360.280.370.360.360.260.330.230.170.020.180.160.130.370.260.280.150.370.390.280.20.230.140.190.05
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-6.22124-0.9-13.0273.521147.10420101424241515111922211818185.826-18.5418.229144.43132134.5055.039167.8999.9045.2669.731615
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.30.07.8-0.3-3.87.31.05.94.32.06.43.44.97.68.55.66.14.1519.47.77.66.0529.5545.1153.7-6.5169.7303.1100.814.3279.22.22.07.63.65.02.44.16.96.9

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value168201196178217227216226209222204204188203184168161181179180176191162167171183173168152156144144136167145146133152160162152129
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.80.063.365.164.061.260.661.762.862.962.563.263.764.563.462.862.762.04727.061.362.162.64646.14870.04515.764.23573.93489.93475.667.82987.467.468.366.966.266.367.968.367.167.969.067.2

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-200000.00-400000.0000-45000.00-1400000.00
Percentage of GainsLossesOnExtinguishmentOfDebt100.00.0100.00.00.00.0100.00.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.0-0.10.00.00.0-0.00.0-0.50.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value951111139512214414014012313112211910711210699951111121141071141011019510294977674726963827474637078766877676356
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.20.036.734.936.038.839.438.337.237.137.536.936.335.536.637.237.338.02973.938.737.937.42895.82943.32514.135.91958.02012.71738.932.21494.932.631.733.133.833.732.131.732.932.131.032.233.432.832.3

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value-1.71.514-15.87.014232824312717219.9752720213433312720282627202417122.51813131027192011262719149.848
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.60.04.6-5.82.13.86.67.97.49.08.45.57.13.29.47.58.211.8876.010.99.76.8824.3762.2727.37.3509.5364.0287.81.1275.76.25.010.88.79.26.012.011.68.26.65.1

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

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-1.9-2.4-1.7-0.91.0-10.7-9.8-0.50.1-4.7
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments111.8-160.0-12.05.714.3-76.4-41.7-1.70.4-26.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.70.0-0.5-0.30.3-2.9-2.7-0.10.0-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value0.22.17.2-6.2-3.93.66.07.26.57.4447.1644.65.7-22.7048.1587.1825.764131110107.403108.982108.8999.0886.7534.4661.7724.7935.4814.0169.5696.9047.3734.4899.2689.4776.7035.3671.172
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.02.3-2.3-1.11.01.72.02.02.12.21.41.9-7.22.82.72.24.5306.03.63.62.4313.3261.3267.43.1187.4139.7101.50.899.02.62.03.83.13.32.34.24.02.82.40.6

us-gaap:IncomeTaxExpenseBenefit us-gaap:DerivativeInstrumentRisk

us-gaap:InterestRateContract


Income
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-30
Value0.30.40.1-1.6-0.2-1.0-0.50.0
Percentage of IncomeTaxExpenseBenefit150.05.6-1.641.0-3.3-13.9-7.70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.0-0.5-0.1-0.3-0.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateContract0.00.00.00.00.00.00.00.0

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

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-0.4-0.7-0.4-0.20.2-2.8-2.7-0.20.0-1.3
Percentage of IncomeTaxExpenseBenefit-200.0-33.3-5.63.2-5.1-77.8-45.0-2.80.0-28.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.0-0.1-0.10.1-0.8-0.8-0.10.0-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value3.03.84.14.64.95.55.55.55.25.0995.0325.34.11.9621.9911.8591.6711.2481.2961.3071.5541.4791.651.8511.8851.8641.8991.9441.6711.4451.4841.5171.4951.5721.6351.6371.5061.1381.2263.3724.0174.41
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.01.31.71.41.51.51.51.61.41.51.61.40.60.70.70.70.434.20.40.50.547.253.849.70.739.240.238.00.630.70.70.70.60.70.70.80.50.51.41.82.3

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.8-2.55.6101017121521212117131717171215108.1920.7468.557.8136.0741712137.2571718129.202106.348.6762.215
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.40.01.83.22.84.94.86.07.3569.77.26.14.4511.0500.9459.94.3322.1224.6186.30.3176.73.63.07.05.55.93.77.87.75.44.24.53.14.51.3

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-03-312020-09-302020-03-312019-09-30
Value-3.85.61017
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.41.83.24.9

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value600000.0200000.0500000.0-300000.01200000.0-300000.02500000.01000000.0700000.02583000.0227000.02800000.04000000.0-643000.0-815000.0-229000.0-203000.0105000.0-681000.0-185000.0-2604000.0460000.01757000.0-200000.03294000.0-2700000.02504000.02157000.0-2224000.02206000.01291000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.00.2-0.10.4-0.10.70.30.20.70.10.91.3-0.2-0.3-0.1-0.10.0-18.0-0.1-0.90.250.3-5.867.9-55.956.90.9-46.01.00.6

us-gaap:NonoperatingIncomeExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterest


Nonoperating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-400000.0-400000.0-400000.0-300000.0-300000.0-500000.0-100000.0-200000.0-100000.0-300000.0
Percentage of NonoperatingIncomeExpense-66.7-200.0-80.0100.0-25.0166.7-4.0-20.0-14.3-10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.0-0.1-0.1-0.1-0.1-0.0-0.1-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterest


Nonoperating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-100000.0400000.00-200000.001200000.0-100000.0-200000.0-200000.0-200000.0
Percentage of NonoperatingIncomeExpense-16.7200.00.066.70.0-400.0-4.0-20.0-28.6-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.00.0-0.10.00.3-0.0-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value2.36.919-10.1113036332935322422123022233535333121282822192322111.806171210282320152725232011
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.06.2-3.73.48.110.39.28.89.910.07.77.64.010.38.39.012.2928.111.411.27.1821.3821.8588.26.8480.7460.1268.90.8352.45.95.111.210.79.47.912.510.49.89.56.2

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-6.9-9.6-2.1-20.0-6.1-6.3-6.6-6.0-5.6-5.967-5.268-6.5-6.6-2.745-4.043-3.278-3.617-2.482-4.854-4.405-5.189
Percentage of OperatingIncomeLoss-300.0-139.1-10.9198.0-53.5-21.0-18.0-17.7-19.2-17.0-16.0-26.2-29.3-21.8-13.4-14.7-15.7-6.9-13.8-13.2-16.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.60.0-0.7-7.3-1.8-1.7-1.9-1.6-1.7-1.7-1.6-2.0-2.2-0.9-1.4-1.2-1.4-0.8-128.0-1.5-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, knl:LifestyleSegment


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value1218169.113182525202020
Percentage of OperatingIncomeLoss556.5263.882.9-90.1119.363.068.175.570.984.389.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.80.05.23.34.05.17.07.06.26.56.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:LifestyleSegment11.20.013.89.711.00.018.217.815.816.218.1

us-gaap:OperatingSegments, knl:OfficeSegment


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-30
Value-3.6-1.75.40.83.9171814141515108.9-2.824154.3958.776172013199.099
Percentage of OperatingIncomeLoss-156.5-24.628.0-7.934.258.049.942.248.343.748.341.939.6-22.451.619.838.149.957.940.662.332.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.40.01.70.31.14.75.13.94.24.34.83.23.0-0.95.31.63.46.1537.64.67.0264.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:OfficeSegment-2.40.02.80.41.80.08.46.47.00.08.05.34.80.08.10.00.00.00.00.00.00.0

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1100000.01100000.01200000.0400000.0-4600000.01100000.0-400000.0-2800000.0-1500000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.00.40.1-1.40.3-0.1-0.8-0.5

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:DerivativeInstrumentRisk

us-gaap:InterestRateContract


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-30
Value1100000.01200000.0400000.0-4600000.0-400000.0-2800000.0-1500000.01200000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.40.1-1.4-0.1-0.8-0.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateContract0.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-31
Value-4.321178.7-23.90.0-3.6-17.479-8.6625.7372.1820.3430.6741.5-11.617-7.4243.794-3.7554.96-1.569
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.60.05.63.2-7.00.0-1.1-4.9-2.72.00.80.119.343.6-306.4-153.178.5-85.4102.5-0.8

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-8.88.57.53.6-1.62.0-4.1
Percentage of OtherComprehensiveIncomeLossNetOfTax204.739.443.641.46.70.0113.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.30.02.41.3-0.50.5-1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes0.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-09-30
Value7.24.33.10.8-8.40.40.1-6.462-8.386-0.139-0.138-0.137-0.136
Percentage of OtherComprehensiveIncomeLossNetOfTax-167.419.918.09.235.10.0-2.837.096.8-2.4-6.3-39.90.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.70.01.00.3-2.50.10.0-1.8-2.7-0.0-0.1-0.1-3.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-31
Value1.11.11.20.4-4.6-2.8-1.5-3.164
Percentage of OtherComprehensiveIncomeLossNetOfTax-25.65.17.04.619.20.041.718.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.00.40.1-1.4-0.8-0.5-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-03-312020-06-302020-03-312019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-09-302015-09-302015-06-302015-03-312014-03-31
Value-3.83.9-9.30.41.90.247-0.2765.8762.320.48-1.781-4.2280.118-12.999-3.819
Percentage of OtherComprehensiveIncomeLossNetOfTax88.444.838.90.0-52.8-1.43.2102.4106.3139.90.0-627.37.9111.9101.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.41.4-2.70.10.60.1-0.12.00.90.2-47.0-121.03.4-342.9-86.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312011-06-302010-06-30
Value-1.9-0.6000000000000017.0-9.6101017211824201315321912152121131717171115108.1920.672128.676
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.70.02.3-3.53.22.84.95.95.46.96.24.15.110.36.64.86.07.3569.94.4511.0500.9459.94.2329.5216.9186.30.35.44.5

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

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-1.5-1.7-1.3-0.70.8-7.9-7.1-0.30.1-3.4
Percentage of ProfitLoss78.9283.3-18.67.37.3-76.7-40.6-1.40.6-25.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.60.0-0.4-0.30.2-2.1-2.0-0.10.0-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:Parent


Profit
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-03-31
Value-1.97.0-9.61017211824131532191215212213171717118.186
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.099.8100.2100.099.899.8100.1100.0102.2100.199.8100.1100.099.899.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.72.3-3.53.24.95.95.46.94.15.210.36.64.86.07.3582.34.4510.2501.4460.14.2186.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1.97.0-9.610172118241315321912152122
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.099.8100.2100.099.899.8100.1100.0102.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.72.3-3.53.24.95.95.46.94.15.210.36.64.86.07.3582.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2643123092743403713563673323543273232963162912682562923.7932942843053.4953.4383.7912864.854.8334.3982304.839214200250219221196223239238220239202192175
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Revenue
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-30
Value264309274340356367332354327323296316291268256292292294284268
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.07700.9100.0100.07813.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.07700.9100.0100.07813.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, knl:LifestyleSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value11312711693123142137144130128111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.140.637.634.236.438.338.539.239.239.837.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.140.637.634.236.438.338.539.239.239.837.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:LifestyleSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, knl:OfficeSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value150185193180216229219223202211197194185210192
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.959.462.465.863.661.761.560.860.859.860.360.262.466.566.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.959.462.465.863.661.761.560.860.859.860.360.262.466.566.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments

knl:Commercial, knl:LifestyleSegment


Revenue
Period End2021-03-312020-03-31
Value3858
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.417.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.417.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:Commercial knl:LifestyleSegment100.0100.0

knl:Commercial, knl:OfficeSegment


Revenue
Period End2021-03-312020-03-31
Value123211
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.662.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.662.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:Commercial knl:OfficeSegment100.0100.0

knl:Residential, knl:LifestyleSegment


Revenue
Period End2021-03-312020-03-31
Value7554
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.716.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.716.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:Residential knl:LifestyleSegment100.0100.0

knl:Residential, knl:OfficeSegment


Revenue
Period End2021-03-312020-03-31
Value2716
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.34.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.34.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:Residential knl:OfficeSegment100.0100.0

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

knl:FilesAndStorage, knl:OfficeSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1718202526262725242321222822
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.97.67.47.07.37.57.76.97.36.67.58.97.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.97.67.47.07.37.57.76.97.36.67.58.97.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:FilesAndStorage knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:OfficeSystems, knl:OfficeSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value908483100117111114106116111106104118109
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.927.430.329.731.531.231.331.932.833.932.835.137.637.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.927.430.329.731.531.231.331.932.833.932.835.137.637.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:OfficeSystems knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:OtherProducts, knl:OfficeSegment


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value129.710131613129.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.53.13.64.44.23.83.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.53.13.64.44.23.83.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:OtherProducts knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0

knl:ProductsAndServicesAncillary, knl:OfficeSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5352454941363025272420182118
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.216.916.614.511.310.38.27.77.87.56.56.26.86.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.216.916.614.511.310.38.27.77.87.56.56.26.86.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:ProductsAndServicesAncillary knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:ProductsAndServicesCoverings, knl:LifestyleSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1919192725283029262827272626
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.47.08.06.98.18.48.77.48.88.69.28.49.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.47.08.06.98.18.48.77.48.88.69.28.49.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:ProductsAndServicesCoverings knl:LifestyleSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:ProductsAndServicesStudio, knl:LifestyleSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value107967496116108113101116101101847972
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.331.227.328.331.330.530.830.532.830.931.228.425.224.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.331.227.328.331.330.530.830.532.830.931.228.425.224.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:ProductsAndServicesStudio knl:LifestyleSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:Seating, knl:OfficeSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2325213033323430352934313233
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.58.37.88.99.09.19.49.310.19.110.510.510.311.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.58.37.88.99.09.19.49.310.19.110.510.510.311.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:Seating knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

knl:LifestyleSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1131271169312314213714413014213012811110698
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.140.637.634.236.438.338.539.239.240.239.739.837.633.534.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.140.637.634.236.438.338.539.239.240.239.739.837.633.534.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:LifestyleSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:OfficeSegment


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value150185193180216229219223202211197194185210192
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.959.462.465.863.661.761.560.860.859.860.360.262.466.566.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.959.462.465.863.661.761.560.860.859.860.360.262.466.566.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax knl:OfficeSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2643123092743403713563673323543273232963162912682562923.7932942843053.4953.4383.7912864.854.8334.3982304.839214200250219221196223239238220239202192175
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-30
Value2.22.32.62.83.02.92.9853.0153.52.93.1953.1622.5923.3235.2913.7934.2494.1333.438
Percentage of Revenues0.70.80.80.80.80.90.80.91.11.01.01.11.01.31.8100.01.41.5100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.80.80.80.80.90.80.91.11.01.01.11.01.31.8100.01.41.5100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.70.80.80.80.80.90.80.91.11.01.01.11.01.31.81.31.41.51.3

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

us-gaap:OperatingSegments, knl:LifestyleSegment


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value2.22.22.32.22.62.53.12.4
Percentage of Revenues0.70.80.70.60.70.81.00.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.80.70.60.70.81.00.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:LifestyleSegment1.92.31.91.61.81.92.42.2

us-gaap:OperatingSegments, knl:OfficeSegment


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-30
Value0.00.10.30.60.50.40.1860.4490.50.50.2750.3320.450.2740.6330.4660.4880.5810.415
Percentage of Revenues0.00.00.10.20.10.10.10.10.20.20.10.10.20.10.212.30.20.212.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.20.10.10.10.10.20.20.10.10.20.10.212.30.20.212.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments knl:OfficeSegment0.00.10.10.30.20.20.10.20.30.30.10.20.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-30
Value8996908410310710310694968893848176757275778075817272737571746458555753545053474853524748
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.030.929.330.930.428.829.129.128.427.327.128.928.625.726.328.128.325.82045.827.326.726.62061.92121.51925.926.41477.31548.41470.025.41142.626.726.621.823.124.324.221.622.522.221.325.5

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-312009-12-31
Value1451145313891361149613571333131412261212861875864856858849849856842851869868837804677673664695668664676688678687655
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value8478407989561092930925921840827502535544545549546561600599622657655598580448472474506479488505522522561
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets58.457.857.570.373.068.569.470.168.568.258.361.163.063.764.064.366.170.271.273.175.575.571.472.166.370.271.572.971.773.574.876.077.081.6

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value1451145313891361149613571333131412261212861875864856858849849856842851869868837804677673664695668664676688678687
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-31
Value4364474274044034274083923863843583393203103093022872552422282122132392232282001891881891761701651268944
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.130.830.829.727.031.530.629.931.531.741.638.837.036.336.035.633.929.828.826.924.424.528.627.833.729.828.527.128.326.525.224.018.413.70.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value348364356344490340337324331322278282276272276287299308288297318311282263236228225258237235245264251261
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.025.125.725.332.825.125.324.727.026.632.332.332.031.832.233.935.336.134.335.036.635.933.732.734.933.934.037.235.535.436.338.537.138.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-312008-12-31
Value1037147.81308.52.92.41.567.3172.2035.8335.9243.0359.854113.5485.3484.1929.757101419158.4739.134121312291011112810134.5926105.96114
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.72.61.00.68.70.60.20.20.10.60.30.70.70.41.11.30.40.00.51.21.21.72.21.90.01.11.82.01.94.31.61.71.74.10.02.00.03.90.00.90.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312016-12-31
Value1037147.81308.58.32.92.41.61.4162.29.9
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.72.61.00.68.70.60.00.20.20.10.00.00.31.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value7783919111410711810912011086917783848399116931041211149495104908910599103114126124126
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.76.66.77.67.98.98.39.89.110.110.59.09.79.89.811.713.611.112.314.013.211.311.915.413.413.515.214.915.616.918.318.318.4

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value206193205202203195182177170170144149150146142146146140148143144140138138127969496981019698899185
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.213.314.814.913.614.413.613.513.914.116.817.017.417.116.517.217.316.417.616.816.616.216.60.015.814.214.014.614.115.214.614.513.013.512.4

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-03-312020-12-312020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value403715111112141314151013121211
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.82.61.10.80.90.91.11.11.21.81.21.61.51.51.4

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2020-09-302019-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value4428282926222422212219121612111412101011
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.22.13.33.53.12.72.92.52.52.62.41.82.41.91.62.21.91.51.51.7

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value514520493469445404405391378367362
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.438.340.254.651.947.346.657.854.453.452.8

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value55716867636366
Percentage of PropertyPlantAndEquipmentGross10.913.814.014.414.315.616.4
Percentage of Assets3.85.35.67.87.47.47.6
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value393552325532231811114.42
Percentage of PropertyPlantAndEquipmentGross7.66.710.76.912.58.15.84.83.13.21.2
Percentage of Assets2.72.64.33.86.53.92.72.81.71.70.6
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndBuilding


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value121611121111120117108106105
Percentage of PropertyPlantAndEquipmentGross2.53.12.42.72.72.929.730.028.829.129.0
Percentage of Assets0.91.21.01.51.41.413.817.415.715.515.3
Percentage of Assets us-gaap:LandAndBuilding0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value67625954464140
Percentage of PropertyPlantAndEquipmentGross13.212.112.111.710.310.410.1
Percentage of Assets4.74.64.96.45.44.94.7
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.0

us-gaap:MachineryAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value230236237243232226261255257248253
Percentage of PropertyPlantAndEquipmentGross44.945.448.151.952.255.964.565.268.167.769.8
Percentage of Assets15.917.419.328.327.126.430.137.737.136.136.8
Percentage of Assets us-gaap:MachineryAndEquipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OfficeEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value33271918352826
Percentage of PropertyPlantAndEquipmentGross6.55.24.03.97.97.16.4
Percentage of Assets2.32.01.62.14.13.33.0
Percentage of Assets us-gaap:OfficeEquipment0.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7471434020
Percentage of PropertyPlantAndEquipmentGross14.413.78.88.64.7
Percentage of Assets5.15.23.54.72.4
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value277281278269248232240253253245240
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.120.722.731.329.027.227.637.536.535.735.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-312009-12-31
Value236237227226224239221215214203200209204200197184179172166164161165162147137133127124121120122121123122135
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.316.316.416.615.017.616.616.417.516.823.323.923.723.423.021.821.220.119.719.318.619.019.418.320.419.819.218.018.218.118.117.718.217.820.6

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:CA


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value282826292620252729293133
Percentage of PropertyPlantAndEquipmentNet12.212.112.514.613.412.215.620.323.323.925.724.5
Percentage of Assets2.02.12.23.43.12.43.04.14.24.24.65.1
Percentage of Assets country:CA0.00.00.00.00.00.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1861911721571571371239480777583
Percentage of PropertyPlantAndEquipmentNet78.880.080.378.780.180.175.068.864.863.461.661.7
Percentage of Assets12.914.114.118.318.416.114.214.011.611.210.912.7
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.00.0

srt:Europe


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2118151312
Percentage of PropertyPlantAndEquipmentNet9.07.97.26.76.5
Percentage of Assets1.51.41.31.61.5
Percentage of Assets srt:Europe0.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312014-02-032013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value3413493403323283323193173203231421421411411411341281271271281281281281254679808080808082767676
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.524.124.524.421.924.524.024.126.126.716.516.216.416.516.515.815.114.915.215.114.714.815.415.60.011.811.912.111.612.112.112.211.111.311.1

us-gaap:Goodwill us-gaap:ReportingUnit

knl:LifestyleSegment


Goodwillus-gaap:
Period End2020-10-01
Value98
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:LifestyleSegment0.0

knl:Muuto


Goodwillus-gaap:
Period End2020-10-01
Value183
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:Muuto0.0

knl:OfficeSegment


Goodwillus-gaap:
Period End2020-10-01
Value58
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:OfficeSegment0.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

knl:LifestyleSegment


Goodwillus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302017-12-31
Value240249286278274277287105
Percentage of Goodwill70.471.284.183.883.683.688.974.5
Percentage of Assets16.617.120.620.418.320.523.712.3
Percentage of Assets knl:LifestyleSegment0.00.00.00.00.00.00.00.0

knl:OfficeSegment


Goodwillus-gaap:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312014-12-312014-09-302014-03-312013-12-312012-12-312011-12-31
Value100545454535439393536363535363737373837
Percentage of Goodwill29.615.615.916.216.416.412.312.411.111.125.525.227.828.628.929.647.047.549.5
Percentage of Assets6.93.83.94.03.64.03.03.02.93.04.24.24.14.24.44.65.55.55.5
Percentage of Assets knl:OfficeSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

knl:StudioSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value2952772802772856868555554515.4145.2022.2062.2
Percentage of Goodwill84.483.687.787.688.948.548.643.242.742.441.06.86.52.92.9
Percentage of Assets20.320.521.021.123.28.08.06.46.36.56.40.80.70.30.3
Percentage of Assets knl:StudioSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

knl:TradeNameDatesWeiser


Indefinite
Period End2020-12-31
Value2.3
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0
Percentage of Assets0.2
Percentage of Assets knl:TradeNameDatesWeiser0.0

knl:TradeNameHollyHunt


Indefinite
Period End2020-10-01
Value23
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:TradeNameHollyHunt0.0

knl:TradeNameKnoll


Indefinite
Period End2020-10-01
Value187
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:TradeNameKnoll0.0

knl:TradenameMuuto


Indefinite
Period End2020-10-01
Value62
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.0
Percentage of Assets0.0
Percentage of Assets knl:TradenameMuuto0.0

us-gaap:TradeNames


Indefinite
Period End2020-12-312019-12-312018-09-302017-12-312013-12-312013-09-30
Value2782772872251726
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill12104.30.00.00.00.00.0
Percentage of Assets19.220.423.726.22.53.9
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value340347346343343348350349353358238239240241241239238240251252252253254259214222222222222222219220221222
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.423.924.925.222.925.626.326.628.829.627.727.427.828.128.228.228.128.129.929.729.129.230.432.331.733.033.532.033.333.532.532.132.632.3

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

knl:VariousIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value18162.4922.5192.059
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0
Percentage of Assets1.31.20.20.20.2
Percentage of Assets knl:VariousIntangibleAssets0.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value5153596310
Percentage of FiniteLivedIntangibleAssetsNet281.9322.82406.32503.8530.5
Percentage of Assets3.54.04.95.21.3
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value1811501161121079494970.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets12.510.38.48.37.27.07.17.40.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value3.43.52.42.32.43.6109.31.4314.0711.4471.4561.4231.4361.4341.091.115.0774.9885.3555.5966.176.2314.0074.3464.6374.9525.1633.4023.6293.9270.9081.1641.199
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.30.80.70.10.30.20.20.20.20.20.10.10.60.60.60.60.70.70.50.60.70.70.70.50.50.60.10.20.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value10310191971221311311181261181081039989978180896775821149794917567837365788386101
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.17.06.67.28.29.79.99.010.39.812.711.811.610.511.49.69.510.58.08.99.513.211.611.713.511.310.212.011.09.911.612.212.714.7

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value3332374030
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0
Percentage of Assets2.32.43.13.33.5

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value276256257250274290293274272251223215204194222209195216178182192231209177168145143175148142150183164191
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.017.618.518.418.421.422.020.922.220.825.924.623.722.725.924.623.125.221.221.422.126.725.022.124.821.621.525.322.221.422.226.624.227.9

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312011-06-302010-12-31
Value1414141717171717171710.010.010.010.010.010.010.010.010.010.010.010.010.00.00.150.135
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of Assets1.01.01.01.31.11.31.31.31.41.41.21.11.21.21.21.21.21.21.21.21.11.21.20.00.00.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value29272626242021210.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.11.91.91.91.71.51.61.60.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value1281131241091101201231181281141041019494114117105114101968893918276677486747469846885
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.87.89.08.17.48.99.39.010.59.412.111.611.011.013.413.812.413.412.111.310.210.810.910.211.310.011.212.411.111.210.312.310.112.4

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value269295294462589428430444443463181208223232208183198212247264290248251268173183193193203218228212230245
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.620.321.234.039.431.632.333.836.238.221.023.925.927.124.321.623.324.829.431.033.328.530.033.325.527.229.027.830.432.833.730.833.935.6

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302017-12-31
Value969380777787868554
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.66.55.85.75.26.47.17.16.3

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2422132117
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.12.52.0
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value182929291914138.52023181617171820202626262632302917158.932118.6728.7646.8586.7786.6887.218
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.32.02.12.21.31.11.00.61.62.02.11.92.02.12.22.42.43.13.13.13.13.73.73.72.62.31.31.71.31.31.01.01.01.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value173141107104988787900.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets11.99.77.87.76.66.46.56.90.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value30
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets2.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value27
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets1.9

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value24
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets1.7

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value18
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets1.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value59
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets4.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-06-302019-03-31
Value168107108111
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets11.67.98.18.5

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value194
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets13.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value26
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets1.8

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-31
Value4364474274044034274083923863843583393203103093022872552422282122132392232282001891881891761701651268944
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.130.830.829.727.031.530.629.931.531.741.638.837.036.336.035.633.929.828.826.924.424.528.627.833.729.828.527.128.326.525.224.018.413.70.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312012-12-312011-12-312011-06-302010-12-31
Value447403427406408392386385369366358340320311309302287255242228212213239224228182158155126
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.827.031.50.030.629.931.531.80.00.041.738.937.036.336.035.733.929.828.826.924.524.528.627.933.726.223.123.018.4

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-312016-12-31
Value-3.85.0-3.5-11.0-14.6-13.0-10.2-8.10.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.01.10.00.0-3.6-3.0-2.5-2.10.00.0
Percentage of Assets-0.30.3-0.3-0.8-1.0-1.0-0.8-0.70.00.0
Percentage of Assets knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-312016-12-312016-09-302016-06-302015-12-31
Value-29.0-36.2-40.5-43.6-44.4-36.0-39.8-40.3-38.2-29.4-23.24-23.104-22.832
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-8.10.00.0-11.0-8.4-9.7-10.4-10.6-9.5-7.7-8.0-8.9
Percentage of Assets-2.0-2.5-2.9-3.2-3.0-2.7-3.0-3.3-4.4-3.4-2.7-2.7-2.7
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-312016-12-31
Value-5.6-6.7-7.8-9.0-9.4-4.8-5.5-1.20.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-1.50.00.0-2.3-1.1-1.3-0.30.00.0
Percentage of Assets-0.4-0.5-0.6-0.7-0.6-0.4-0.4-0.10.00.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value-50.1-45.8-67.4-84.6-93.3-69.4-86.0-72.0-72.0-68.394-52.445-53.0-50.8-43.774-35.141-40.878-43.06-43.403-33.891-31.974-37.318-32.6825.137-26.778-15.886
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-10.20.00.0-23.1-16.2-21.2-17.6-18.3-17.7-13.6-14.4-13.9-12.2-10.3-12.8-13.8-14.0-11.2-11.1-14.6-15.32.2-14.7-10.0
Percentage of Assets-3.5-3.2-4.9-6.2-6.2-5.10.0-5.4-5.5-5.6-4.30.00.0-5.1-4.0-4.7-5.0-5.1-4.0-3.8-4.4-3.80.8-3.9-2.3
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-312016-12-312016-09-302016-06-302015-12-31
Value-11.7-7.9-15.6-21.0-24.9-15.6-16.5-18.8-5.6-14.0-10.651-8.87-14.486
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-1.80.00.0-6.2-3.6-4.0-4.9-1.6-4.5-3.5-3.1-5.7
Percentage of Assets-0.8-0.5-1.1-1.5-1.7-1.1-1.2-1.5-0.7-1.6-1.3-1.0-1.7
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value75757167646663605858565454545250485552504741372723
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.016.80.00.016.015.615.714.914.915.214.814.815.015.215.415.715.617.817.517.618.519.316.315.214.9
Percentage of Assets5.25.25.15.04.34.90.04.64.44.84.70.00.06.36.05.85.76.46.26.05.54.75.54.03.4
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-312016-12-31
Value-50.1-45.8-67.4-84.6-93.3-69.4-72.0-68.4-43.8-43.4
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-10.20.00.0-23.1-16.2-17.6-17.7-12.2-14.0
Percentage of Assets-3.5-3.2-4.9-6.2-6.2-5.1-5.4-5.6-5.1-5.1
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.50.50.50.50.50.50.50.50.50.4940.4950.50.50.4930.4930.4930.4940.4910.4910.4910.4880.4870.4830.4790.477
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.10.00.00.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.30.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312012-12-312011-12-31
Value436447427404403427406408392386384368366358339320310309302287255242228212213239223228182158
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0100.00.00.0100.0100.0100.0100.0100.099.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.999.9100.0100.0100.0
Percentage of Assets30.130.830.829.727.031.50.030.629.931.531.70.00.041.638.837.036.336.035.633.929.828.826.924.424.528.627.833.726.223.1
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value410417423421432429427419405395379366361347322310304297283268244204180180150
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.093.30.00.0107.0100.5105.4102.6103.3102.398.799.398.796.894.796.998.096.093.593.395.995.779.299.294.8
Percentage of Assets28.328.730.530.928.931.60.031.430.932.231.30.00.040.336.835.935.634.633.331.628.623.526.726.021.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0494000.0495000.0493000.0493000.0493000.0494000.0491000.0491000.0491000.0488000.0488000.0488000.0489000.0487000.0487000.0484000.0483000.0482000.0482000.0479000.0479000.0479000.0479000.0477000.0478000.0470000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value75757167646660585856545250485552504745434041383437353027282623231914
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.25.25.15.04.34.94.64.44.84.76.36.05.85.76.46.26.05.55.45.24.74.74.64.25.55.34.64.04.23.93.53.42.92.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value410417423421432429419405395379347322310304297283268244238226215204201187184189185184172166158155129114
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.328.730.530.928.931.631.430.932.231.340.336.835.935.634.633.331.628.628.426.724.823.524.123.327.328.227.826.625.925.123.422.619.116.7

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-312009-12-312008-12-31
Value-50.1-45.8-67.4-84.6-93.3-69.4-72.0-72.0-68.394-52.445-43.774-35.141-40.878-43.06-43.403-33.891-31.974-37.318-42.125-42.799-44.299-32.682-1.4842.1475.902-25.262-26.449-24.88-12.426-17.012-11.856-14.5036.334-3.161-10.227-29.447
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-3.5-3.2-4.9-6.2-6.2-5.1-5.4-5.5-5.6-4.3-5.1-4.0-4.7-5.0-5.1-4.0-3.8-4.4-5.0-5.0-5.1-3.8-0.20.30.9-3.8-4.0-3.6-1.9-2.6-1.8-2.10.9-0.5-1.60.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1441295.9-16.4404236194430285.644
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.513.29.72.2-4.810.811.810.05.712.59.28.71.914.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-9100000.0-15400000.0-7300000.02100000.0-10300000.0-17400000.0-41400000.0-12700000.0-9200000.0-18940000.0-9232000.0-7900000.0-312200000.0-11154000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.4-4.9-2.40.8-3.0-4.7-11.6-3.5-2.8-5.3-2.8-2.4-105.3-3.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-31.6-5.0-16.2-131.0149-22.74.7-23.6-9.1-20.013-23.583-37.0320-35.548
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.0-1.6-5.2-47.843.9-6.11.3-6.4-2.7-5.6-7.2-11.4108.0-11.2

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-26.5226.7-122.81220.25.40.50.8-14.814
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.07.32.2-44.835.90.11.50.10.2-4.64.7

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.69.90.70.0-6.30.00.0
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.00.0100.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-03-312020-12-312020-03-312019-12-31
Value10101110
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3.88.1-8.8-23.0-6.83.6-9.311-7.56.284-1.6298.0-0.22.6183.48711-5.105121.923-11.4081.29918-8.082-7.081-29.318171.8723.538-0.36415-16.0469.7547.153-9.802-7.6685.541-6.865-10.379-5.992
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-5.4-9.2-1.0-22.49.4-4.9-7.711-11.4103.2065.26.3-0.28914-6.544-1.8762.406-12.781-7.646-8.5724-10.631-17.8028.55421-9.7939.281-9.72712-15.7416.116-4.218-9.954-12.075-3.9247.077-15.55411
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value15-12.22.3-0.6103.35.84.77.1-0.0012.5744.09.6-3.566-1.24.0464.765-4.650.397-0.9387.348-5.7225.122-0.6265.7072.7078.273.7916.5342.92-1.223-3.8634.664-0.5767.287-4.3553.186-1.5136.84
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1441295.9-16.4404236194430285.644
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.513.29.72.2-4.810.811.810.05.712.59.28.71.914.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312011-06-302010-06-30
Value-1.9-0.6000000000000017.0-9.6101017211824201315321912152121131717171115108.1920.672128.676
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-0.22.3-3.53.22.84.95.95.46.96.24.15.110.36.64.86.07.3569.94.4511.0500.9459.94.2329.5216.9186.30.35.44.5

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

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value-1.5-1.7-1.3-0.70.8-7.9-7.1-0.30.1-3.4
Percentage of ProfitLoss78.9283.3-18.67.37.3-76.7-40.6-1.40.6-25.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.5-0.4-0.30.2-2.1-2.0-0.10.0-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:Parent


Profit
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-03-31
Value-1.97.0-9.61017211824131532191215212213171717118.186
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.099.8100.2100.099.899.8100.1100.0102.2100.199.8100.1100.099.899.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.72.3-3.53.24.95.95.46.94.15.210.36.64.86.07.3582.34.4510.2501.4460.14.2186.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1.97.0-9.610172118241315321912152122
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.099.8100.2100.099.899.8100.1100.0102.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.72.3-3.53.24.95.95.46.94.15.210.36.64.86.07.3582.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value4.24.13.93.31.63.13.12.42.22.4732.2382.12.42.3442.2711.6993.3443.2232.6542.4542.1382.5162.0762.1891.3852.1932.2111.9841.6742.4622.8232.5152.4832.7262.6322.5392.262.7112.161
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-9100000.0-15400000.0-7300000.02100000.0-10300000.0-17400000.0-41400000.0-12700000.0-9200000.0-18940000.0-9232000.0-7900000.0-312200000.0-11154000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.4-4.9-2.40.8-3.0-4.7-11.6-3.5-2.8-5.3-2.8-2.4-105.3-3.5

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value8.97.310101710129.2185.3497.58.5118.677101014108.047.017107.1677.4764.8649.594149.9277.8148.5786.6266.4573.6153.4493.0245.5922.4635.151.97
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-31.6-5.0-16.2-131.0149-22.74.7-23.6-9.1-20.013-23.583-37.0320-35.548
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.0-1.6-5.2-47.843.9-6.11.3-6.4-2.7-5.6-7.2-11.4108.0-11.2

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.63.7000000000000073534.34.24.34.24.34.3-46.212526.8165-7.5
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:CreditFacility, us-gaap:DebtInstrument

knl:TermLoan, knl:AmendedCreditAgreement


Repayments
Period End2020-09-30
Value50
Percentage of RepaymentsOfLongTermDebt93.1

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3.63.03.02.08.98.38.48.37.87.2577.3277.77.77.1937.2717.3028.4277.2717.2197.5317.1967.175.6925.7735.7295.7275.6525.6845.6795.6415.6295.6125.6024.6624.6614.6364.6254.6252.772
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value8.842.350.70.397-0.546-25.44225.40.2510.266-0.01-0.0020.260.271-0.328-0.0050.0410.2720.0090.349-0.0170.371-0.0020.380.3430.3680.0160.3680.3840.3530.020.3590.398-0.0040.3610.3610.38200.340.3410.368
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2020-12-312019-12-312018-12-31
Value110000.0110000.020000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-31
Value20.8320.8322.59
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value91858654765510999959493
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6831252844596034575550
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value700000.0800000.0875000.0875000.0875000.04407000.04922000.04611000.01152000.02044000.01953000.01821000.01673000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3800000.04300000.04789000.04789000.06161000.06317000.07901000.08991000.07798000.09454000.09378000.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:AccountsReceivableAllowanceRecoveryOfBadDebtsAndOther

knl:AccountsReceivableAllowanceRecoveryOfBadDebtsAndOther


Accounts
Period End2021-03-31
Value100000.0
Percentage of AccountsReceivableAllowanceRecoveryOfBadDebtsAndOther100.0

knl:AccountsReceivableCreditLossExpenseOther

knl:AccountsReceivableCreditLossExpenseOther


Accounts
Period End2020-09-302020-06-302020-03-31
Value-300000.0100000.0200000.0
Percentage of AccountsReceivableCreditLossExpenseOther100.0100.0100.0

knl:Baddebtandcustomercredits

knl:Baddebtandcustomercredits


Baddebtandcustomercredits
Period End2020-09-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value200000.0-200000.0600000.0300000.0712000.0-1289000.0300000.0400000.03019000.0247000.0-1141000.0-509000.01449000.03572000.01191000.091000.0722000.0371000.0
Percentage of Baddebtandcustomercredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableCashPaidPerAcquirerShare dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType

knl:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableCashPaidPerAcquirerShare

knl:HermanMillerInc, srt:ScenarioForecast, us-gaap:SubsequentEvent


Business
Period End2021-09-30
Value11.0
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableCashPaidPerAcquirerShare100.0

knl:BusinessCombinationModificationOfAcquireeShareBasedCompensationAwardsPerformanceMeasurementAchievementPercentage dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType

knl:BusinessCombinationModificationOfAcquireeShareBasedCompensationAwardsPerformanceMeasurementAchievementPercentage

knl:HermanMillerInc, srt:ScenarioForecast, us-gaap:SubsequentEvent


Business
Period End2021-09-30
Value100.0
Percentage of BusinessCombinationModificationOfAcquireeShareBasedCompensationAwardsPerformanceMeasurementAchievementPercentage100.0

knl:BusinessCombinationPotentialTerminationFee us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:SubsequentEventType

knl:BusinessCombinationPotentialTerminationFee

knl:HermanMillerInc, srt:ScenarioForecast, us-gaap:SubsequentEvent


Business
Period End2021-09-30
Value43
Percentage of BusinessCombinationPotentialTerminationFee100.0

knl:CumulativePerformanceTargetIncreaseDecreasePercentage us-gaap:AwardType

knl:CumulativePerformanceTargetIncreaseDecreasePercentage

knl:RestrictedStockUnitsPerformanceBased


Cumulative
Period End2020-09-30
Value-30.0
Percentage of CumulativePerformanceTargetIncreaseDecreasePercentage100.0

knl:DerivativeLiabilityDecreaseInNotionalAmount us-gaap:DerivativeInstrumentRisk

knl:DerivativeLiabilityDecreaseInNotionalAmount

us-gaap:InterestRateSwap


Derivative
Period End2021-03-312020-12-31
Value500.0
Percentage of DerivativeLiabilityDecreaseInNotionalAmount100.00.0

knl:NonCashRestructuringCharges

knl:NonCashRestructuringCharges


Non
Period End2021-03-312020-03-31
Value900000.0300000.0
Percentage of NonCashRestructuringCharges100.0100.0

knl:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentDueToLongTermIntercompanyNotesNetOfTax

knl:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentDueToLongTermIntercompanyNotesNetOfTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-8.88.57.53.6-1.64.3-7.12.0-4.1-5.6163.094-5.1-0.50.00.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentDueToLongTermIntercompanyNotesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

knl:RestructuringAndOtherCharges

knl:RestructuringAndOtherCharges


Restructuring
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302014-12-312014-06-302014-03-312013-12-312013-06-302013-03-31
Value3.63.38.67.60.10.00.11.20.80.50.00.02.150.00.00.00.50.40.70.2030.5925.1040.00.0
Percentage of RestructuringAndOtherCharges100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0

knl:ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketBasedRestrictedStockUnitsAmendedTermsReductionOfNumberSharesEarnedPercentage

knl:ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketBasedRestrictedStockUnitsAmendedTermsReductionOfNumberSharesEarnedPercentage


Share
Period End2021-02-12
Value50.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketBasedRestrictedStockUnitsAmendedTermsReductionOfNumberSharesEarnedPercentage100.0

knl:TemporaryEquityBeneficialOwnershipRequirement us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityBeneficialOwnershipRequirement

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value50.0
Percentage of TemporaryEquityBeneficialOwnershipRequirement100.0

knl:TemporaryEquityChangeInControlRedemptionPricePercentage us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityChangeInControlRedemptionPricePercentage

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value100.0
Percentage of TemporaryEquityChangeInControlRedemptionPricePercentage100.0

knl:TemporaryEquityCommonStockVolumeWeightedAveragePricePerShareCompanyConversionElectionThreshold us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityCommonStockVolumeWeightedAveragePricePerShareCompanyConversionElectionThreshold

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value29.312
Percentage of TemporaryEquityCommonStockVolumeWeightedAveragePricePerShareCompanyConversionElectionThreshold100.0

knl:TemporaryEquityConversionPriceAfterEightAnniversary us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityConversionPriceAfterEightAnniversary

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value100.0
Percentage of TemporaryEquityConversionPriceAfterEightAnniversary100.0

knl:TemporaryEquityConversionPriceAfterSeventhAnniversary us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityConversionPriceAfterSeventhAnniversary

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value105.0
Percentage of TemporaryEquityConversionPriceAfterSeventhAnniversary100.0

knl:TemporaryEquityConversionPriceAfterSixthAnniversary us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityConversionPriceAfterSixthAnniversary

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value110.0
Percentage of TemporaryEquityConversionPriceAfterSixthAnniversary100.0

knl:TemporaryEquityDividendRatePercentage us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

knl:TemporaryEquityDividendRatePercentage

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value4.5
Percentage of TemporaryEquityDividendRatePercentage100.0

knl:TemporaryEquityDividendsShares us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

knl:TemporaryEquityDividendsShares

us-gaap:ConvertiblePreferredStock, us-gaap:PreferredStock


Temporary
Period End2021-03-31
Value2000.0
Percentage of TemporaryEquityDividendsShares100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-03-312019-12-312017-12-31
Value0.96.516
Percentage of AssetImpairmentCharges100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1


Business
Period End2020-09-30
Value0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset10.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1


Business
Period End2020-12-312020-09-302020-06-302019-06-302018-12-312017-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0.10.0120.00.00.00.00.0-5.00.00.00.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1100.00.0100.00.00.00.00.00.0100.00.00.00.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 us-gaap:BusinessAcquisition

knl:FHILLC


Business
Period End2021-03-312020-09-302020-06-30
Value1.10.012
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability10.00.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value193.12.47.4192.10.2-54.529
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentPeriodicPayment us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DebtInstrumentPeriodicPayment

knl:MulticurrencyTermLoan, knl:AmendedCreditAgreement


Debt
Period End2021-03-31
Value700000.0
Percentage of DebtInstrumentPeriodicPayment100.0

knl:TermLoan, knl:AmendedCreditAgreement


Debt
Period End2021-03-31
Value2800000.0
Percentage of DebtInstrumentPeriodicPayment400.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-400000.0-400000.0-400000.0-300000.0-300000.0-400000.0-100000.0-200000.0-100000.0-183000.0-73000.0-400000.0-400000.0-242000.0-154000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-100000.000-200000.00-200000.0-100000.0-200000.0-200000.0-184000.0-182000.0-200000.0-200000.0-372000.0-371000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets


Defined
Period End2020-09-30
Value5.75
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.32.42.52.62.73.63.94.04.04.3653.9974.64.64.5994.615
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.10.00.00.10.00.0-0.10.10.10.030.030.00.00.0440.043
Percentage of DefinedBenefitPlanInterestCost100.00.00.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.11.21.21.61.51.62.52.42.52.542.6122.52.52.2852.39
Percentage of DefinedBenefitPlanInterestCost1100.00.00.01600.00.00.0-2500.02400.02500.08466.78706.70.00.05193.25558.1

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-0.10.0-0.3-0.2-0.1-0.1-0.171-0.17-0.2-0.2-0.328-0.327
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.82.00.40.1-0.2108.5-0.9-0.8-0.203-0.6842.9-1.50.79-2.071
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.00.00.0-100.00.0-3566.7-4250.0900.0800.0118.7402.4-1450.0750.0-240.9633.3

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-1.6-2.0-1.3-0.8-0.7109.80.50.2-0.5-0.6-4.6-2.2
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.6-2.0-1.3-0.8-0.7-10.6-9.8-0.5-0.2
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.0100.0100.0100.0-101.0-100.0-100.0-100.0

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred


Derivative
Period End2021-03-312020-12-31
Value-4700000.010400000.0
Percentage of DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStockCash

us-gaap:Parent


Dividends
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-03-31
Value3.13.51.48.58.68.67.57.5197.97.37.4157.4117.4917.5537.4497.5077.3955.815.8895.9855.8975.679
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividends
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.13.51.48.58.68.67.57.5197.97.37.4157.4117.4917.5537.4497.507
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash us-gaap:StatementClassOfStock

us-gaap:DividendsPreferredStockCash

us-gaap:ConvertiblePreferredStock


Dividends
Period End2021-03-31
Value1800000.0
Percentage of DividendsPreferredStockCash100.0

us-gaap:DividendsPreferredStockCash us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:ConvertiblePreferredStock, us-gaap:AdditionalPaidInCapital


Dividends
Period End2021-03-31
Value1800000.0
Percentage of DividendsPreferredStockCash100.0

us-gaap:DividendsPreferredStockCash us-gaap:StatementEquityComponents

us-gaap:Parent


Dividends
Period End2021-03-312020-09-30
Value1800000.01400000.0
Percentage of DividendsPreferredStockCash100.00.0

us-gaap:RetainedEarnings


Dividends
Period End2021-03-312020-09-30
Value1800000.01400000.0
Percentage of DividendsPreferredStockCash100.00.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-400000.01900000.0300000.0200000.0-300000.0200000.0-100000.0002000000.0200000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

us-gaap:ForeignCurrencyTransactionGainLossUnrealized


Foreign
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-500000.00-700000.0700000.0-1300000.0-700000.0-158000.0-2175000.0-200000.02000000.073000.0-1492000.0110000.012000.0497000.0281000.0-343000.0-1262000.01616000.0355000.0-453000.07271000.02960000.03228000.0-2256000.02708000.02401000.01123000.0659000.0-2053000.01414000.0-1358000.0-1254000.05753000.0-533000.0-1415000.0
Percentage of ForeignCurrencyTransactionGainLossUnrealized100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2020-09-302020-06-302018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-03-312013-12-312013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value200000.01200000.0-2635000.0-129000.0-54000.0-4000.0-25000.0-1000.0-3000.06000.0-7000.0-837000.0-165000.0-464000.00-2000.0-2000.0491000.0-43000.035000.0-41000.0-37000.0-6000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-31
Value-8.79.57.89999999999999954.4-4.12.6-3.7-2.412
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

knl:LifestyleSegment


Goodwill
Period End2021-03-312020-09-302020-06-302020-03-31
Value-8.87.7000000000000014.1-3.5
Percentage of GoodwillForeignCurrencyTranslationGainLoss101.197.593.285.4

knl:OfficeSegment


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-31
Value0.10.30.20.3-0.60.20.1-0.387
Percentage of GoodwillForeignCurrencyTranslationGainLoss-1.13.22.56.814.67.7-2.716.0

us-gaap:ImpairmentOfLeasehold

us-gaap:ImpairmentOfLeasehold


Impairment
Period End2021-03-31
Value300000.0
Percentage of ImpairmentOfLeasehold100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7100000.04100000.0-7300000.0-8800000.0-1000000.014500000.0-10100000.0
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value3.227-12.04.10.8-5.3-1.72.6-1.82.2-3.08.841-7.2983.263-1.45612-1.12710-7.7494.008-0.3480.5361.229-0.393-0.0485.124-1.0820.1181.0990.2261.5162.867-0.6890.839-2.237
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value25000.0329000.00735000.086000.0701000.0459000.0415000.013000.0537000.0459000.0648000.0-24000.0511000.0912000.0927000.060000.0792000.0645000.0689000.0-25000.0724000.0749000.0705090.03000.0696000.0609000.0848900.09000.0763000.0739000.0-32000.0372000.0396000.0600000.0-54000.0542000.0658000.0714000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet


Interest
Period End2021-03-312020-09-302020-06-302019-06-30
Value-1300000.0-1600000.0-1300000.0-100000.0
Percentage of InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet100.0100.0100.0100.0

us-gaap:InventoryWriteDown

us-gaap:InventoryWriteDown


Inventory
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1500000.0600000.0300000.01000000.0300000.0400000.0-6000.0860000.0300000.0500000.0446000.0233000.0459000.0744000.0190000.0763000.0776000.0647000.01146000.0646000.0
Percentage of InventoryWriteDown100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseImpairmentLoss

us-gaap:OperatingLeaseImpairmentLoss


Operating
Period End2021-03-31
Value600000.0
Percentage of OperatingLeaseImpairmentLoss100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-30
Value-7.2-4.3-3.1-0.88.4-6.32.5-0.4-0.16.417-1.182-7.7-0.24.8250.1390.1380.1376.1650.1360.136-0.138-8.828-0.353-1.382-1.38225-0.064-0.064-0.064-33.947-0.913-0.956120.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-3800000.05400000.03900000.0-9300000.04900000.0-4000000.0400000.01900000.0-2191000.0-4649000.0-6000000.0-400000.0-3808000.05876000.02320000.0480000.0-3347000.0-1781000.01566000.04049000.0528000.0-4228000.0118000.0-12999000.0-4694000.0-7488000.03730000.0-3819000.0-1650000.04047000.0-2525000.0-95000.04586000.0-5156000.02647000.0-740000.0-8659000.02234000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value-4.719156.9-30.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax us-gaap:StatementEquityComponents

knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value-8.88.57.53.6-1.6
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax187.243.448.752.25.3

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value7.83.32.50.2-12.3
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax-166.016.816.22.941.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.10.10.0-0.8-6.8
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax-2.10.50.0-11.622.7

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-03-312020-06-302020-03-31
Value-3.83.9-9.3
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax80.956.531.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value-1.523189.1-28.4
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax us-gaap:StatementEquityComponents

knl:AccumulatedForeignCurrencyTranslationAdjustmentOnLongtermIntercompanyNotes


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value-8.88.57.53.6-1.6
Percentage of OtherComprehensiveIncomeLossBeforeTax586.736.040.139.65.6

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value9.75.74.21.1-11.3
Percentage of OtherComprehensiveIncomeLossBeforeTax-646.724.222.512.139.8

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.41.69999999999999951.60000000000000050.5-6.2
Percentage of OtherComprehensiveIncomeLossBeforeTax-93.37.28.65.521.8

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-03-312020-06-302020-03-31
Value-3.83.9-9.3
Percentage of OtherComprehensiveIncomeLossBeforeTax253.342.932.7

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:InterestRateContract


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1400000.01600000.0500000.0-6200000.0-600000.0-3800000.0-2000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:InterestRateContract


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value100000.00-800000.0-6800000.0-900000.0-3900000.0-2100000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.00.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:InterestRateContract


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-30
Value-1300000.0-1600000.0-1300000.0-600000.0-300000.0-100000.0-100000.00
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302013-12-312013-09-302013-03-312012-12-312012-09-302012-03-31
Value-4.321178.7-23.916-14.00.0-3.6-17.4380.538-2.2-0.8-8.6335.7372.1820.343-9.512-1.9171.434.1874.8070.6741.5324.96-1.569-12.4534.5862.647
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4.3178.7-23.9-14.0-3.6-17.438-2.2-0.8-8.6335.7372.1820.343-9.512-1.917
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4.3178.7-23.9-14.00.0-3.6-17.438-2.2-0.8-8.6335.7372.1820.343-9.512-1.917
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-300000.00600000.02300000.0-1400000.0-1600000.0-2400000.03600000.0-1400000.0-165000.0-216000.0-11000.0-339000.0-97000.0-72000.042000.0-131000.0-7000.0434000.0-7000.0-14000.0-1000.0282000.0-406000.0-8000.0-7000.0
Percentage of OtherNoncashIncomeExpense100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityInvestingActivities

us-gaap:PaymentForContingentConsiderationLiabilityInvestingActivities


Payment
Period End2021-03-31
Value1200000.0
Percentage of PaymentForContingentConsiderationLiabilityInvestingActivities100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value200000.0200000.0100000.0-800000.0400000.000
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.00.00.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


Payments
Period End2021-03-312020-12-312020-09-302015-12-312015-09-302015-06-302015-03-312014-12-31
Value1.85.05.00.2690.6430.0850.2360.915
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve

knl:NorthAmericaOperationsOptimization


Payments
Period End2021-03-312020-12-312020-09-30
Value0.61.82.7
Percentage of PaymentsForRestructuring33.336.054.0

knl:WorkforceReductionAndOtherCostInitiatives


Payments
Period End2021-03-312020-12-312020-09-30
Value1.23.22.3
Percentage of PaymentsForRestructuring66.764.046.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-03-31
Value0100000.01400000.00074000.078000.004500000.0010000.008000.016000.01914000.0009000.02000.02806000.0
Percentage of PaymentsOfFinancingCosts0.0100.0100.00.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4300000.0300000.00200000.03800000.00300000.003000000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.00.0100.0100.00.0100.00.0100.0

us-gaap:PensionExpenseReversalOfExpenseNoncash

us-gaap:PensionExpenseReversalOfExpenseNoncash


Pension
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.62.01.30.80.7109.80.50.20.4990.6284.60.02.1620.0
Percentage of PensionExpenseReversalOfExpenseNoncash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:PensionExpenseReversalOfExpenseNoncash us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, knl:AccumulatedDefinedBenefitPlansAdjustmentPensionSettlementChargeIncludingPortionAttributabletoNoncontrollingInterest


Pension
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-30
Value1.6-7.61.30.80.7-31.29.80.50.24.6
Percentage of PensionExpenseReversalOfExpenseNoncash100.0-380.0100.0100.0100.0-294.3100.0100.0100.0100.0

us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:PreferredStockDividendsAndOtherAdjustments


Preferred
Period End2021-03-312020-12-312020-09-30
Value1900000.01900000.01400000.0
Percentage of PreferredStockDividendsAndOtherAdjustments100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfConvertiblePreferredStock

us-gaap:ProceedsFromIssuanceOfConvertiblePreferredStock


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromIssuanceOfConvertiblePreferredStock0.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Proceeds
Period End2020-07-21
Value161
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value92741031821967152871118170572826.090841301248074997960691019784423185756371717834276859083
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:RevolvingCreditFacility, knl:CreditAgreement, us-gaap:LondonInterbankOfferedRateLIBOR


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value412.0-121.0-109.5289
Percentage of ProceedsFromLinesOfCredit44.62.7-117.5-608.3131.9

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-03-31
Value-100000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2020-09-302020-06-30
Value0.112
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualPayments


Product
Period End2021-03-312020-12-312012-03-312011-03-31
Value1000000.0900000.01850000.01631000.0
Percentage of ProductWarrantyAccrualPayments100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualWarrantiesIssued

us-gaap:ProductWarrantyAccrualWarrantiesIssued


Product
Period End2021-03-312012-03-312011-03-31
Value800000.01717000.01657000.0
Percentage of ProductWarrantyAccrualWarrantiesIssued100.0100.0100.0

us-gaap:ProductWarrantyExpense

us-gaap:ProductWarrantyExpense


Product
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value800000.01900000.02000000.02000000.02100000.02700000.01900000.01600000.01900000.001700000.01700000.01106000.01700000.01800000.01600000.01700000.02000000.01700000.01900000.01700000.01600000.01600000.01700000.01600000.01400000.01700000.01900000.01600000.0
Percentage of ProductWarrantyExpense100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2020-09-302020-06-302020-03-31
Value200000.0400000.0600000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax


Reclassification
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-3200000.0-4000000.0-3300000.0-2200000.0-1600000.0-4800000.04100000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Reclassification
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-1900000.0-2400000.0-1700000.0-900000.0-1000000.0-400000.0-100000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax59.460.051.540.962.58.3-2.4

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Reclassification
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-1300000.0-1600000.0-1600000.0-1300000.0-600000.0-2200000.02000000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax40.640.048.559.137.545.848.8

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:ReclassificationFromAociCurrentPeriodTax


Reclassification
Period End2021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-2800000.0-1500000.0-400000.04500000.01000000.0500000.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest


Reclassification
Period End2021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-2500000.0-1100000.0-300000.02900000.000
Percentage of ReclassificationFromAociCurrentPeriodTax89.373.375.064.40.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Reclassification
Period End2021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-300000.0-400000.0-100000.01600000.01000000.0500000.0
Percentage of ReclassificationFromAociCurrentPeriodTax10.726.725.035.6100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1127222414253771339810595767913234105931069995869911476955910088425908563818688326819810286
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated

knl:NonProductionRelated


Restructuring
Period End2020-09-30
Value-40.0
Percentage of RestructuringAndRelatedCostNumberOfPositionsEliminated100.0

us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Restructuring
Period End2020-10-06
Value200.0
Percentage of RestructuringAndRelatedCostNumberOfPositionsEliminated0.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312017-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302011-12-312011-09-302011-06-302010-06-30
Value3.66.43.3108.20.60.10.12.20.4550.4410.00.02.3140.00.2030.5925.10.00.0-0.0180.2432.147
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.80.6
Percentage of RestructuringCharges0.00.07.57.3

us-gaap:OperatingExpense


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-31
Value6.43.39.87.6
Percentage of RestructuringCharges100.0100.092.592.7

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

us-gaap:CostOfSales, knl:AcceleratedDepreciationEquipment


Restructuring
Period End2020-09-302020-06-302020-03-31
Value0.00.80.6
Percentage of RestructuringCharges0.07.57.3

us-gaap:RestructuringCharges us-gaap:StatementBusinessSegments

knl:LifestyleSegment


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.20.10.00.00.7
Percentage of RestructuringCharges5.61.60.00.08.5

knl:OfficeSegment


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-312014-12-312014-09-302014-06-302013-12-31
Value2.23.62.17.17.50.00.10.11.20.80.50.00.4551.996-0.5970.22.7
Percentage of RestructuringCharges61.156.263.667.091.50.0100.00.00.00.00.00.0100.086.30.098.552.9

us-gaap:RestructuringCharges us-gaap:StatementScenario, us-gaap:RestructuringCostAndReserve, us-gaap:SubsequentEventType

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


Restructuring
Period End2020-10-06
Value10.0
Percentage of RestructuringCharges0.0

srt:ScenarioForecast, us-gaap:FacilityClosing, us-gaap:SubsequentEvent


Restructuring
Period End2020-10-06
Value5.0
Percentage of RestructuringCharges0.0

srt:ScenarioForecast, us-gaap:OneTimeTerminationBenefits, us-gaap:SubsequentEvent


Restructuring
Period End2020-10-06
Value5.0
Percentage of RestructuringCharges0.0

us-gaap:RestructuringReserveAccrualAdjustment1

us-gaap:RestructuringReserveAccrualAdjustment1


Restructuring
Period End2021-03-312020-12-312020-09-30
Value2.76.43.3
Percentage of RestructuringReserveAccrualAdjustment1100.0100.0100.0

us-gaap:RestructuringReserveAccrualAdjustment1 us-gaap:RestructuringCostAndReserve

knl:NorthAmericaOperationsOptimization


Restructuring
Period End2021-03-312020-12-312020-09-30
Value0.81.52.1
Percentage of RestructuringReserveAccrualAdjustment129.623.463.6

knl:WorkforceReductionAndOtherCostInitiatives


Restructuring
Period End2021-03-312020-12-312020-09-30
Value1.94.91.2
Percentage of RestructuringReserveAccrualAdjustment170.476.636.4

us-gaap:SaleOfStockConsiderationReceivedOnTransaction dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

knl:HermanMillerInc, knl:InvestindustrialVIILP, srt:ScenarioForecast, us-gaap:PreferredStock, us-gaap:SubsequentEvent


Sale
Period End2021-09-30
Value253
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Sale
Period End2020-07-21
Value164
Percentage of SaleOfStockConsiderationReceivedOnTransaction0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost


Share
Period End2021-03-31
Value700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4200000.03800000.03300000.01600000.03100000.02400000.02200000.0-6739000.02100000.02400000.0-7318000.02271000.05047000.0-3000.000
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:Parent


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4200000.03800000.03300000.01600000.03100000.02400000.02200000.0-6736000.02100000.02400000.0-7310000.02271000.05039000.04000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.099.8-133.3

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-03-312019-09-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.44.00.33.0-0.0012.42.00.380.00.222100.9610.6
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:Parent


Stock
Period End2021-03-312020-03-312019-09-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-03-31
Value4.44.00.33.0-0.0012.42.00.380.00.222100.9610.61.2471.4110.06.0672.5623.691
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.00.00.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonStock


Entity
Period End2021-02-262020-08-062020-05-072020-02-192019-08-052019-05-092019-02-252018-11-062018-02-232017-11-072017-08-072017-05-082016-11-042016-08-052016-02-262015-11-052015-07-302015-05-072015-02-272014-11-062014-05-072013-11-072013-05-06
Value5050504949494949494949494949494848484848484848
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Entity
Period End2020-08-062020-05-072020-02-192019-08-052019-05-092019-02-252018-11-062018-02-232017-11-072017-08-072017-05-082016-11-042016-08-052016-02-262015-11-052015-07-302015-05-072015-02-272014-11-062014-05-072013-11-072013-05-06
Value1.5947511.5819520.7425590.8961810.9132730.9343570.7132640.9046140.871610.853360.891611.0396381.0421291.2882341.0139341.0342591.0444341.0920741.2584041.270071.1084881.281415
Percentage of EntityCommonStockSharesOutstanding3.13.11.51.81.81.91.41.81.81.71.82.12.12.62.12.12.12.22.62.62.32.7

knl:DeferredTaxAssetOperatingLeaseLiabilities

knl:DeferredTaxAssetOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value3525
Percentage of DeferredTaxAssetOperatingLeaseLiabilities100.0100.0

knl:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesAndOther

knl:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesAndOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5500000.08300000.08350000.03886000.08537000.08195000.09247000.07956000.04755000.04037000.04218000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilitiesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

knl:DeferredTaxLiabilitiesRightOfUseAssets

knl:DeferredTaxLiabilitiesRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value3021
Percentage of DeferredTaxLiabilitiesRightOfUseAssets100.0100.0

knl:DefinedBenefitPlanBenefitObligationHealthCareCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanBenefitObligationHealthCareCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-31
Value6.0
Percentage of DefinedBenefitPlanBenefitObligationHealthCareCostTrendRateAssumedNextFiscalYear100.0

knl:DefinedBenefitPlanBenefitObligationHealthCareCostUltimateTrendRate

knl:DefinedBenefitPlanBenefitObligationHealthCareCostUltimateTrendRate


Defined
Period End2020-12-31
Value4.5
Percentage of DefinedBenefitPlanBenefitObligationHealthCareCostUltimateTrendRate100.0

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-31
Value7.9
Percentage of DefinedBenefitPlanBenefitObligationPrescriptionDrugCostTrendRateAssumedNextFiscalYear100.0

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostUltimateTrendRate

knl:DefinedBenefitPlanBenefitObligationPrescriptionDrugCostUltimateTrendRate


Defined
Period End2020-12-31
Value4.5
Percentage of DefinedBenefitPlanBenefitObligationPrescriptionDrugCostUltimateTrendRate100.0

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-31
Value6.3
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostTrendRateAssumedNextFiscalYear100.0

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostUltimateTrendRate

knl:DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostUltimateTrendRate


Defined
Period End2020-12-31
Value4.5
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostHealthCareCostUltimateTrendRate100.0

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostTrendRateAssumedNextFiscalYear

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-31
Value8.4
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostTrendRateAssumedNextFiscalYear100.0

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostUltimateTrendRate

knl:DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostUltimateTrendRate


Defined
Period End2020-12-31
Value4.5
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostPrescriptionDrugCostUltimateTrendRate100.0

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementDiscountRate

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementDiscountRate


Indefinite
Period End2020-10-01
Value13.0
Percentage of IndefiniteLivedIntangibleAssetImpairmentTestMeasurementDiscountRate100.0

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementRoyaltyRate

knl:IndefiniteLivedIntangibleAssetImpairmentTestMeasurementRoyaltyRate


Indefinite
Period End2020-10-01
Value1.5
Percentage of IndefiniteLivedIntangibleAssetImpairmentTestMeasurementRoyaltyRate100.0

knl:IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

knl:IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount

knl:TradeNameHollyHunt


Indefinite
Period End2020-10-01
Value1.0
Percentage of IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount100.0

knl:TradeNameKnoll


Indefinite
Period End2020-10-01
Value25.0
Percentage of IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount2500.0

knl:IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

srt:Maximum, knl:Muuto


Indefinite
Period End2020-10-01
Value200000.0
Percentage of IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount20000000.0

srt:Minimum, knl:Muuto


Indefinite
Period End2020-10-01
Value100000.0
Percentage of IndefiniteLivedIntangibleAssetsPercentageOfFairValueInExcessOfCarryingAmount10000000.0

knl:LesseeOperatingLeaseLeaseNotYetCommencedLiability

knl:LesseeOperatingLeaseLeaseNotYetCommencedLiability


Lessee
Period End2020-12-31
Value37
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedLiability100.0

knl:LesseeOperatingLeaseLeaseNotYetCommencedRightOfUseAsset

knl:LesseeOperatingLeaseLeaseNotYetCommencedRightOfUseAsset


Lessee
Period End2020-12-31
Value37
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedRightOfUseAsset100.0

knl:LiabilityDefinedBenefitPlanOtherNoncurrent us-gaap:RetirementPlanType

knl:LiabilityDefinedBenefitPlanOtherNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Liability
Period End2020-12-312019-12-312018-12-31
Value3900000.03600000.03300000.0
Percentage of LiabilityDefinedBenefitPlanOtherNoncurrent100.0100.0100.0

knl:OperatingLeaseRightOfUseAssetFairValue

knl:OperatingLeaseRightOfUseAssetFairValue


Operating
Period End2021-03-31
Value1800000.0
Percentage of OperatingLeaseRightOfUseAssetFairValue100.0

knl:RestructuringAndRelatedCostExpectedCostToBePaidWithinNextTwelveMonths

knl:RestructuringAndRelatedCostExpectedCostToBePaidWithinNextTwelveMonths


Restructuring
Period End2020-12-31
Value6000000.0
Percentage of RestructuringAndRelatedCostExpectedCostToBePaidWithinNextTwelveMonths100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value4.84.95.25.34.84.04.33.93.7244.3724.0395.2746.1087.4888.059129.1977.9197.197
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

knl:FHILLC


Business
Period End2021-03-312020-09-302019-08-20
Value131515
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationContingentConsiderationLiability

knl:FHILLC, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value131414142.02.00.0
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.00.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition, us-gaap:FairValueByMeasurementFrequency

knl:FHILLC, us-gaap:FairValueMeasurementsRecurring


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value131414142.02.0
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent


Business
Period End2021-03-312020-12-312018-09-302017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-31
Value111.20.751.11.11.17.15.05.00.0
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent us-gaap:BalanceSheetLocation

us-gaap:OtherCurrentLiabilities


Business
Period End2021-03-312020-09-30
Value111.2
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.00.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:OtherCurrentLiabilities, us-gaap:FairValueInputsLevel3


Business
Period End2020-12-31
Value1.2
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput

knl:FHILLC, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Business
Period End2020-12-31
Value2.5
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent us-gaap:BalanceSheetLocation

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent

us-gaap:OtherNoncurrentLiabilities


Business
Period End2021-03-312020-09-30
Value2.313
Percentage of BusinessCombinationContingentConsiderationLiabilityNoncurrent100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:OtherNoncurrentLiabilities, us-gaap:FairValueInputsLevel3


Business
Period End2020-12-31
Value13
Percentage of BusinessCombinationContingentConsiderationLiabilityNoncurrent0.0

us-gaap:CashEquivalentsAtCarryingValue

us-gaap:CashEquivalentsAtCarryingValue


Cash
Period End2020-12-312019-12-312018-12-31
Value378.51.6
Percentage of CashEquivalentsAtCarryingValue100.0100.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value443335383532414037
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-31
Value287313312483610450451465465484192220222
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value416159180304138
Percentage of DebtInstrumentCarryingAmount14.319.518.937.249.930.8

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

knl:MulticurrencyTermLoan


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value52565481808390
Percentage of DebtInstrumentCarryingAmount18.417.917.416.813.218.619.4

knl:TermLoan


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302017-12-312016-12-312015-12-31
Value193196199221225228330336165175185
Percentage of DebtInstrumentCarryingAmount67.462.663.745.936.950.771.169.485.979.583.3

us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-312018-12-312018-09-302017-12-312016-12-312015-12-31
Value61138134148274537
Percentage of DebtInstrumentCarryingAmount19.530.828.930.614.120.516.7

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DebtWeightedAverageInterestRate

knl:MulticurrencyTermLoan, knl:AmendedCreditAgreement


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1.51.51.750.01750.0150.0150.0175
Percentage of DebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0

knl:TermLoan, knl:AmendedCreditAgreement


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1.611.651.90.01930.02490.0330.0427
Percentage of DebtWeightedAverageInterestRate107.3110.0108.6110.3166.0220.0244.0

us-gaap:LetterOfCredit, knl:CreditAgreement


Debt
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.51.51.750.01750.015
Percentage of DebtWeightedAverageInterestRate100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsGross

knl:TermLoan, knl:AmendedCreditAgreement


Deferred
Period End2020-08-21
Value300000.0
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value3200000.03400000.03700000.03800000.04000000.04300000.03700000.03900000.04219000.04394000.01000000.01118000.01284000.01451000.01617000.01783000.0-1949000.02300000.02900000.02000000.02600000.0900000.0
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-31
Value159138
Percentage of DeferredIncomeTaxLiabilities100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7236303251656843656460
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsInventory


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7000000.05900000.05939000.05939000.08294000.04707000.03883000.03649000.03340000.02762000.03344000.0
Percentage of DeferredTaxAssetsInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.35.06.8987.466.6647.268.6268.8178.4331010
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value100000.01200000.0696000.03063000.04928000.05131000.04218000.03364000.03209000.03103000.03429000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.35.82.1215.5917.63725273.136312617
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1.11.00.9351.3122.2672.1313.7063.774.1874.46710
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5300000.04800000.03722000.02972000.06493000.05813000.05794000.07347000.04966000.07343000.04883000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1800000.01400000.0-32000.0858000.02985000.02949000.02750000.02127000.01986000.01514000.01365000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2700000.02700000.02055000.01779000.03222000.03245000.02893000.02880000.02781000.03459000.02884000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9492855886848682848280
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3324262434292216111113
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent


Defined
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value1524303233221213132.86121111315175161636973727021185.615576264545555563734
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value206203243295280
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.1-0.4-1.537-2.295-2.175
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4949556050
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax49000.0-12300.0-3638.5-2625.5-2313.9

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-1500000.0-1100000.0-1043000.0-1015000.0-1302000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-49000000.0-49200000.0-55923000.0-60256000.0-50327000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax3266.74472.75361.75936.63865.4

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-1400000.0-1500000.0-2580000.0-3310000.0-3477000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:Range, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

srt:Maximum, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.350.03150.03660.0420.0451
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.40.02020.02480.02350.023
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate17.064.167.856.051.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value2.680.0334
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate114.0106.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.23.93.6023.8065.7366.294
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value206203243295280273
Percentage of DefinedBenefitPlanBenefitObligation4914.35223.16763.37765.84884.84350.3

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.31.31.2351.243
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value56597989
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter4323.14592.36425.97196.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.20.3010.231
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value12131618
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths4300.06500.05620.98200.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.30.2630.24
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value12121719
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive4200.04300.06475.78111.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.30.2620.241
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value12131719
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour4200.04333.36628.28074.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.30.2630.234
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value12131719
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree4233.34466.76589.48297.4

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.30.2540.235
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value12131719
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo4300.04433.36789.88090.2

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value300000.0200000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:CorporateBondSecurities, us-gaap:FairValueInputsLevel12And3, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value635771
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

us-gaap:CorporateBondSecurities, us-gaap:FairValueInputsLevel2, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value635771
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

us-gaap:ShortTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value7.54.67.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.87.910.5

us-gaap:ShortTermInvestments, us-gaap:FairValueInputsLevel12And3, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value7.54.67.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.87.910.5

us-gaap:USGovernmentDebtSecurities, us-gaap:FairValueInputsLevel12And3, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value141937
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21.934.252.0

us-gaap:USGovernmentDebtSecurities, us-gaap:FairValueInputsLevel2, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value141937
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21.934.252.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType

us-gaap:FairValueInputsLevel1, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value7.54.67.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.87.910.5

us-gaap:FairValueInputsLevel12And3, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value8582121
Percentage of DefinedBenefitPlanFairValueOfPlanAssets133.7142.1169.8

us-gaap:FairValueInputsLevel2, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value7777114
Percentage of DefinedBenefitPlanFairValueOfPlanAssets121.9134.2159.4

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value9699112
Percentage of DefinedBenefitPlanFairValueOfPlanAssets151.9171.7156.8

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value182181233273263210
Percentage of DefinedBenefitPlanFairValueOfPlanAssets285.6313.8326.70.00.00.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4200000.0-3900000.0-3602000.0-3806000.0-5736000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-24200000.0-22000000.0-9685000.0-21671000.0-17166000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan576.2564.1268.9569.4299.3

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

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

knl:GrowthAssetFunds, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value54.00.54
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0

us-gaap:FixedIncomeFunds, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value46.00.46
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage85.285.2

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

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

knl:GrowthAssetFunds, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value55.00.540.48
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0

us-gaap:FixedIncomeFunds, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value45.00.460.620.580.46
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations81.885.2129.20.00.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations181.8185.2208.30.00.0

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

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherCurrentLiabilities, us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value4.75.15.35.65.52.62.10.70.255
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value2.93.95.36.67.34.05.42.91.434
Percentage of DerivativeFairValueOfDerivativeLiability61.776.5100.0117.9132.7153.8257.1414.3562.4

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateSwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value7.69.01012126.67.53.61.7
Percentage of DerivativeFairValueOfDerivativeLiability161.7176.5200.0217.9232.7253.8357.1514.3666.7

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateSwap, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value7.69.01012126.67.53.61.7
Percentage of DerivativeFairValueOfDerivativeLiability161.7176.5200.0217.9232.7253.8357.1514.3666.7

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312017-12-31
Value7.69.01012126.67.51.6890.0
Percentage of DerivativeFairValueOfDerivativeLiability161.7176.5200.0217.9232.7253.8357.1662.40.0

us-gaap:DerivativeLiabilityNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilityNotionalAmount

us-gaap:InterestRateSwap


Derivative
Period End2021-03-312020-12-312020-09-302019-12-312018-12-31
Value200200250250300
Percentage of DerivativeLiabilityNotionalAmount100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2125312019372827403641372946443531333634
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-12-312014-12-312012-12-312011-12-312010-12-31
Value1816121610
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value5039302721
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

knl:VariousIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value1814111010
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization35.436.236.238.646.4

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value3225181611
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization64.663.860.557.953.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value6900000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value8200000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value9800000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value10000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

knl:VariousIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value3630131312
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value8478787922
Percentage of FiniteLivedIntangibleAssetsGross232.6255.3580.2595.4186.1

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure


Indefinite
Period End2020-12-31
Value0.9
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure100.0

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, knl:TradeNameDatesWeiser


Indefinite
Period End2020-12-31
Value0.9
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value398387384386260
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value1461371411331371291139997977991827974747774817780797468403740404241433536
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves


Inventory
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value524955605858586765645850595960636158595856545652494948505247484641
Percentage of InventoryRawMaterialsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves


Inventory
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value7.66.77.88.58.48.110108.2827.9256.9437.287.837.3277.1867.7627.7777.477.6257.2946.9377.2658.2326.5796.5987.0187.0437.6267.697.1397.1736.9267.218
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value33
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:RevolvingCreditFacility, knl:CreditAgreement


Letters
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312017-12-312016-12-31
Value5100000.05100000.05100000.05100000.05100000.05100000.05200000.05200000.05167000.05367000.05766000.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityFairValueOfAmountOutstanding us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityFairValueOfAmountOutstanding

us-gaap:RevolvingCreditFacility, knl:CreditAgreement


Line
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312017-12-312016-12-31
Value4161591803041381291401342745
Percentage of LineOfCreditFacilityFairValueOfAmountOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility, knl:CreditAgreement


Line
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312017-12-312016-12-31
Value35333333521490256265254260267249
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value14
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value269
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value14
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value14
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value3.84.9
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:ForeignCountry


Operating
Period End2020-12-31
Value18
Percentage of OperatingLossCarryforwards100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-31
Value1.2
Percentage of OperatingLossCarryforwards6.6

us-gaap:OtherLongTermDebtCurrent

us-gaap:OtherLongTermDebtCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value14171710.010.010.010.010.010.010.010.010.010.00.0
Percentage of OtherLongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4043474145404440402722202121202018171620
Percentage of OtherSundryLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.30.30.3010.2310.612
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.23.93.6023.8065.736
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value24229.6852117
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent576.2564.1268.9569.4299.3

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-03-312020-12-312020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value121326191721212519292528272714
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrual


Product
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-312009-12-312008-12-31
Value101010101010109.79.6239.5989.1748.898.9448.858.9068.9458.788.5138.3878.3538.2238.188.2978.1788.2148.1637.9697.8527.9547.9258.1278.1468.1458.099.77311
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualClassifiedCurrent

us-gaap:ProductWarrantyAccrualClassifiedCurrent


Product
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value101010101010109.79.6239.5989.1748.898.9448.9068.5138.188.2147.8528.1468.09
Percentage of ProductWarrantyAccrualClassifiedCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount us-gaap:ReportingUnit

us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount

knl:LifestyleSegment


Reporting
Period End2020-10-01
Value20.0
Percentage of ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount100.0

knl:Muuto


Reporting
Period End2020-10-01
Value5.0
Percentage of ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount25.0

knl:OfficeSegment


Reporting
Period End2020-10-01
Value10.0
Percentage of ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount50.0

us-gaap:RestructuringAndRelatedCostExpectedCost1

us-gaap:RestructuringAndRelatedCostExpectedCost1


Restructuring
Period End2021-03-312020-12-312020-09-302020-01-31
Value2.8363718
Percentage of RestructuringAndRelatedCostExpectedCost1100.0100.0100.0100.0

us-gaap:RestructuringAndRelatedCostExpectedCostRemaining1

us-gaap:RestructuringAndRelatedCostExpectedCostRemaining1


Restructuring
Period End2020-12-31
Value31
Percentage of RestructuringAndRelatedCostExpectedCostRemaining1100.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302019-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3000000.02100000.0700000.02400000.0200000.0725000.0539000.0741000.0826000.01062000.01240000.03134000.05696000.00253000.01629000.01774000.01445000.0
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:RestructuringReserve us-gaap:RestructuringCostAndReserve

knl:NorthAmericaOperationsOptimization


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value300000.0100000.0400000.01000000.00
Percentage of RestructuringReserve10.04.857.141.70.0

knl:WorkforceReductionAndOtherCostInitiatives


Restructuring
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value2700000.02000000.0300000.01400000.0200000.0
Percentage of RestructuringReserve90.095.242.958.3100.0

us-gaap:SaleOfStockPricePerShare dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:StatementScenario, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:SaleOfStockPricePerShare

knl:HermanMillerInc, knl:InvestindustrialVIILP, srt:ScenarioForecast, us-gaap:PreferredStock, us-gaap:SubsequentEvent


Sale
Period End2021-09-30
Value25.06
Percentage of SaleOfStockPricePerShare100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

knl:RestrictedStockUnitsMarketBased


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value13.2613.2912.4614.411.9610.128.180
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.00.0

knl:RestrictedStockUnitsPerformanceBased


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value19.6221.0720.9220.4418.4518.2817.360
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue148.0158.5167.9141.9154.3180.6212.20.0

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value20.7621.2721.0320.4118.017.3416.3818.32
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue156.6160.0168.8141.7150.5171.3200.20.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

knl:StockCompensationPlans


Share
Period End2020-12-31
Value900000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2020-12-31
Value20000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value22.59
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:TemporaryEquityCarryingAmountAttributableToParent

us-gaap:TemporaryEquityCarryingAmountAttributableToParent


Temporary
Period End2021-03-312020-12-312020-09-30
Value166165163
Percentage of TemporaryEquityCarryingAmountAttributableToParent100.0100.0100.0

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests us-gaap:StatementClassOfStock

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests

us-gaap:ConvertiblePreferredStock


Temporary
Period End2021-03-312020-12-31
Value166165
Percentage of TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests100.0100.0

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:ConvertiblePreferredStock, us-gaap:AdditionalPaidInCapital


Temporary
Period End2021-03-312020-12-31
Value166164
Percentage of TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests99.999.9

us-gaap:TemporaryEquityLiquidationPreferencePerShare us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:TemporaryEquityLiquidationPreferencePerShare

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value1000.0
Percentage of TemporaryEquityLiquidationPreferencePerShare100.0

us-gaap:TemporaryEquityRedemptionPricePerShare us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:TemporaryEquityRedemptionPricePerShare

us-gaap:ConvertiblePreferredStock, knl:InvestmentAgreement


Temporary
Period End2020-07-21
Value16.75
Percentage of TemporaryEquityRedemptionPricePerShare100.0

us-gaap:TemporaryEquitySharesIssued

us-gaap:TemporaryEquitySharesIssued


Temporary
Period End2021-03-312020-12-312020-09-30
Value169169165
Percentage of TemporaryEquitySharesIssued100.0100.0100.0

us-gaap:TemporaryEquitySharesOutstanding

us-gaap:TemporaryEquitySharesOutstanding


Temporary
Period End2021-03-312020-12-312020-09-30
Value169169165
Percentage of TemporaryEquitySharesOutstanding100.0100.0100.0

us-gaap:TemporaryEquitySharesOutstanding us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:ConvertiblePreferredStock, us-gaap:PreferredStock


Temporary
Period End2021-03-312020-12-31
Value0.1690.167
Percentage of TemporaryEquitySharesOutstanding0.10.1

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
Value4900000.04000000.03724000.04039000.08059000.07919000.0
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowanceOfDeferredTaxAssets


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3800000.04300000.04789000.04789000.06161000.06317000.07901000.08991000.07798000.09454000.09378000.08890000.09241000.0
Percentage of ValuationAllowancesAndReservesBalance77.6107.5128.6118.676.479.80.00.00.00.00.00.00.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:NonoperatingIncomeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
('us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome', None)
Nonoperating Income Expenseus-gaap: Reclassification Out Of Accumulated Other Comprehensive Income, us-gaap: Statement Equity Components
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
Other Comprehensive Income Loss Net Of Taxus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'knl:LifestyleSegment')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'knl:OfficeSegment')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components