WRK


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementGeographical
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:Revenues

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ConsolidatedEntities

us-gaap:GrossProfit
us-gaap:ConsolidatedEntities

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidatedEntities

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities

us-gaap:IncomeTaxesPaidNet

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableNetCurrent
us-gaap:ConsolidatedEntities

us-gaap:InventoryNet
us-gaap:ConsolidatedEntities

us-gaap:InventoryFinishedGoodsAndWorkInProcess

us-gaap:InventoryLIFOReserve

us-gaap:OtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities

us-gaap:Goodwill
us-gaap:ConsolidatedEntities

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:ConsolidatedEntities

us-gaap:OtherAssetsNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:DebtCurrent
us-gaap:ConsolidatedEntities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebtCurrent

us-gaap:AccountsPayableCurrent
us-gaap:ConsolidatedEntities

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

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities

us-gaap:OtherLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities

us-gaap:DepreciationDepletionAndAmortization
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:ConsolidatedEntities

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:StatementBusinessSegments

us-gaap:BusinessCombinationIntegrationRelatedCosts
us-gaap:StatementBusinessSegments

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities

us-gaap:CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanContributionsByEmployer
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanCurtailments
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStockCash

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:ConsolidatedEntities

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainLossOnDispositionOfAssets1
us-gaap:ConsolidatedEntities

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:InterestIncomeExpenseNonoperatingNet
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:InterestPaidNet

us-gaap:LeaseCost

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent
us-gaap:StatementEquityComponents
us-gaap:NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification

us-gaap:OperatingLeaseCost

us-gaap:OtherAssetImpairmentCharges

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherRestructuringCosts

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:ConsolidatedEntities

us-gaap:PaymentsOfDividendsMinorityInterest
us-gaap:ConsolidatedEntities

us-gaap:PaymentsToAcquireInterestInSubsidiariesAndAffiliates
us-gaap:ConsolidatedEntities

us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:ConsolidatedEntities

us-gaap:PensionAndOtherPostretirementBenefitExpense
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromInsuranceSettlementInvestingActivities
us-gaap:ConsolidatedEntities
us-gaap:LiabilityForCatastropheClaimsByCatastrophicEvent, us-gaap:StatementBusinessSegments

us-gaap:ProceedsFromIssuanceOfDebt
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromRepaymentsOfCommercialPaper
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:RestructuringAndRelatedCostIncurredCost
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross

us-gaap:SubleaseIncome

us-gaap:TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired
us-gaap:IncomeTaxAuthorityName
us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

wrk:AdditionalAccrualsAndAdjustmentsToAccruals

wrk:AdditionalReceivableForExpectedRecoveryAndInterest

wrk:CostOfRealEstateSold
us-gaap:RetirementPlanType
wrk:DefinedBenefitPlanNetPeriodicBenefitCostCompany
us-gaap:Range
wrk:EffectiveTaxRateNetOfTaxComponentsOfOtherComprehensiveIncome
us-gaap:ConsolidatedEntities
wrk:EquityInIncomeOfConsolidatedEntities

wrk:GainOnSaleOfCertainClosedFacilities
us-gaap:StatementEquityComponents
wrk:IncomeLossExcludingPortionAttributableToRedeemableNoncontrollingInterest
us-gaap:ConsolidatedEntities
wrk:IntercompanyCapitalInvestmentNonCashInvestingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyCapitalReceiptNonCashFinancingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyDividendsPaidNonCashFinancingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyInterestIncomeExpenseNet
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesBorrowingNonCashFinancingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesIssuedNonCashInvestingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesPayments
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesPaymentsNonCashFinancingActivities
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesProceeds
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesProceedsNonCashInvestingActivities
us-gaap:StatementEquityComponents
wrk:IssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings

wrk:IssuancesOfCommonStockNetOfRelatedMinimumTaxWithholdings
us-gaap:ConsolidatedEntities
us-gaap:RetirementPlanType
wrk:MultiemployerAndOtherPlansPeriodCost

wrk:MultiemployerPensionWithdrawalIncomeExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
wrk:NonAllocatedExpenses

wrk:PensionFundingMoreLessThanExpense

wrk:ReductionOfCostOfGoodsSold

wrk:ReductionOfInterestExpense

wrk:RestructuringAndOtherCosts

wrk:RestructuringAndOtherCostsNet
us-gaap:ConsolidatedEntities

wrk:RestructuringAndOtherCostsNetEquipmentAndInventoryRelocationCosts

wrk:RestructuringAndOtherCostsNetFacilityCarryingCosts

wrk:RestructuringAndOtherCostsNetPropertyPlantAndEquipment

wrk:RestructuringAndOtherCostsNetSeveranceAndOtherEmployeeCosts

wrk:RestructuringAndOtherCostsOther
us-gaap:StatementBusinessSegments

wrk:RestructuringAndOtherCostsReserveAccrualAdjustment

wrk:RestructuringAndOtherCostsReservePeriodExpense

wrk:RestructuringAndOtherCostsReserveSettledWithCash
us-gaap:ConsolidationItems
wrk:SegmentReportingInformationSegmentIncome
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

wrk:SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization
us-gaap:ConsolidatedEntities

wrk:SellingGeneralAndAdministrativeIntangibleAmortization
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents
wrk:StockIssuedDuringPeriodIssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings

wrk:VariableAndShortTermLeaseCost

us-gaap:AccrualForEnvironmentalLossContingencies
us-gaap:BalanceSheetLocation

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:ConsolidatedEntities

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:DebtInstrumentFairValue

us-gaap:DebtLongtermAndShorttermCombinedAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:FIFOInventoryAmount

us-gaap:FinanceLeaseLiability

us-gaap:InventoryRawMaterials
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LoansAndLeasesReceivableCollateralForSecuredBorrowings

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:ConsolidatedEntities

us-gaap:MultiemployerPlansWithdrawalObligation

us-gaap:OperatingLeaseLiability

us-gaap:OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:ConsolidatedEntities

us-gaap:RestructuringAndRelatedCostCostIncurredToDate1
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:RestructuringAndRelatedCostExpectedCost1
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
wrk:BorrowingsOutstanding
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
wrk:DebtInstrumentMaximumBorrowingCapacityAmount
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesPayable
us-gaap:ConsolidatedEntities
wrk:IntercompanyNotesReceivable
us-gaap:ConsolidatedEntities
wrk:IntercompanyPayables
us-gaap:ConsolidatedEntities
wrk:IntercompanyReceivables

wrk:InventoriesSuppliesAndSpareParts
us-gaap:ConsolidatedEntities
wrk:InvestmentsInConsolidatedSubsidiaries
us-gaap:MultiemployerPlanName
wrk:MultiemployerPlansWithdrawalObligationAccumulatedFundingDeficiency

wrk:NonRecourseLiabilitiesHeldBySpecialPurposeEntities
us-gaap:ConsolidatedEntities

wrk:RestrictedAssetsHeldBySpecialPurposeEntities
us-gaap:ConsolidatedEntities

wrk:RestructuringAndOtherCostsReserve

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
us-gaap:CommonStockValue ▄▄▄▄▄▄▄2222222NANANA2NANANA
us-gaap:CommonStockSharesOutstanding █▇▆▆▄▃▁259258257257256255253NANANA254NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▆▆▄▃▁▃▄▂▂259258257257256255253255256254254NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁260259NA258259259NA260260259NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁259258NA257256254NA256256255NANANANA
us-gaap:EarningsPerShareBasic ▁▁▃▂▂▁▂▂▂█▂▃▁▁0.570.541.210.980.630.551.11.050.874.450.771.30.410.32
us-gaap:EarningsPerShareDiluted ▁▁▃▂▂▁▂▂▂█▂▃▁▁0.570.531.20.980.620.541.081.030.864.380.761.290.40.32
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▆███▆▅▅▄▄▄▂▂▁44474423465146904620432742364137401738944060369536563447
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▄▁▅▅▅▄██▅▃630589637643639623676673633608NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiaries▇▇███▃▅▅▄▁4479446047164676463839014249413840343477NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems us-gaap:OperatingSegments▆▆██▇▅▄▃▂▁4498446546884731465943664286417940553932NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:MajorCustomers,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wrk:UnaffiliatedCustomers,wrk:ConsumerPackaging▄▁▇▆▆▄█▇15851513165016281647159716841649NANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:MajorCustomers,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wrk:UnaffiliatedCustomers,wrk:CorrugatedPackaging▆▆▇█▇▄▂▁28612891300130532971271525132423NANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wrk:ConsumerPackaging▄▁▆▆▆▄█▆▅▄1616153616681650166816181709166916371601NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wrk:CorrugatedPackaging▆▆██▇▅▃▂▂▁2882290930193072299027332537244423912319NANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments wrk:ConsumerPackaging▅▁█▇█▅161615361668165016681618NANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments wrk:CorrugatedPackaging▄▅▇█▆▁288229093019307229902733NANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical srt:NorthAmerica▄▃▇█▆▁399539654147422741343829NANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,wrk:ConsumerPackaging▆▁▇██▄128111981295130613081247NANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,wrk:CorrugatedPackaging▄▅▇█▆▁276527882888295428652606NANANANANANANANA
us-gaap:Revenues ▇▆███▆▅▅▄▄▄▂▂▁44474423465146904620432742364137401738944060369536563447
us-gaap:CostOfGoodsAndServicesSold ▇▇▇██▇▅▄▄▃▄▂▂▁36423614357237013720354532943264322031113282300029802855
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▆▄▇▄█▆▇█▇▁502481522475526500514529512445NANANANA
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 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▇▄▄█▆▁▆▆▃▄460-17-3642322-519308336-195-73NANANANA
 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities srt:ParentCompany▆▅▅▆█▇▁▁12210410711117114700NANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇▇█▁▇███-228-360-378-350-277-3572-755-102-250-190NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:ConsolidationEliminations▆▆▆▆▆▁▆█▅▆0-3-2-730-26081745-746-83NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▄▄▄▅▄▄▄▁█▅0862242-9-41544384NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▁▁▂█▁▁▂▂568-61-559-365-1912896-335-356-16-45NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiaries▇▆▅▇▆▁▅█▃▅48848-147498159-1245-130672-757-53NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:SubsidiaryIssuer▆▄▁█▅█▂▂▄▃202-8-308419176470-202-246-3-109NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▃▆▅▂▂█▄▁▁1674319107343613031285661228245NANANANA
 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▇▄▄█▆▁▆▆▃▄460-17-3642322-519308336-195-73NANANANA
 us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities srt:ParentCompany▆▅▅▆█▇▁▁12210410711117114700NANANANANANA
us-gaap:NetIncomeLoss ▁▁▃▂▂▁▂▂▂█▂▃▁▁148138310252160139279268223113519632810380
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▂▂▃▁▂▃▂▂▂█123132339-151692321811851391030NANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiaries▁▁▃▂▁▁▂▂▂█187196356301217167265255232984NANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities srt:ParentCompany▄▄█▇▅▄▁▁▁148138310252160139-800NANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities srt:SubsidiaryIssuer▁▁▃▂▁▁▂▂▂█2001744302151381562882682231135NANANANA
us-gaap:ProfitLoss ▁▁▃▂▂▁▂▂▂█▂▃▁▁14813931225316113928027122411331953269878
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▂▂▃▁▂▃▂▂▂█123132339-151692321811851391030NANANANA
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiaries▁▁▃▂▁▁▂▂▂█188197358302219167265259234983NANANANA
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:ParentCompany▄▄█▇▅▄▁▁▁148138310252160139-800NANANANANA
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:SubsidiaryIssuer▁▁▃▂▁▁▂▂▂█2001744302151381562882682231135NANANANA
us-gaap:DepreciationDepletionAndAmortization ▇████▆▂▂▂▁374381383385383359314315316306NANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments wrk:ConsumerPackaging▁█133135NANA139138NANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments wrk:CorrugatedPackaging▁█239244NANA242218NANANANANANANANA
us-gaap:IncreaseDecreaseInInventories ▂█▇▂▃▇▅▁▄▇-208371-28-37131-42974NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇▇█▁▇███-228-360-378-350-277-3572-755-102-250-190NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:ConsolidationEliminations▆▆▆▆▆▁▆█▅▆0-3-2-730-26081745-746-83NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiaries▄▄▄▅▄▄▄▁█▅0862242-9-41544384NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▁▁▂█▁▁▂▂568-61-559-365-1912896-335-356-16-45NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiaries▇▆▅▇▆▁▅█▃▅48848-147498159-1245-130672-757-53NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:SubsidiaryIssuer▆▄▁█▅█▂▂▄▃202-8-308419176470-202-246-3-109NANANANA
us-gaap:PaymentsOfDividendsCommonStock ██▆▆▆▅▂▂▁▁120120117117117116111110109109NANANANA
 us-gaap:PaymentsOfDividendsCommonStock us-gaap:ConsolidatedEntities srt:ParentCompany██▃▃▃▁120120117117117116NANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value22222222
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value259258257257256255253254
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value259258257257256255253255256254254251257
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value260259258259259260260259
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value259258257256254256256255
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.570.541.210.980.630.551.11.050.874.450.771.30.410.32
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.570.531.20.980.620.541.081.030.864.380.761.290.40.32
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value44474423465146904620432742364137401738944060369536563447
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-662-626-702-629-657-197-688-673-651-191
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.9-14.2-15.1-13.4-14.2-4.6-16.3-16.3-16.2-4.9
Percentage of Revenues-14.9-14.2-15.1-13.4-14.2-4.6-16.3-16.3-16.2-4.9
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value630589637643639623676673633608
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.213.313.713.713.814.416.016.315.815.6
Percentage of Revenues14.213.313.713.713.814.416.016.315.815.6
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4479446047164676463839014249413840343477
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.7100.8101.499.7100.490.2100.3100.0100.489.3
Percentage of Revenues100.7100.8101.499.7100.490.2100.3100.0100.489.3
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-51-41-36-41-39-39-49-41-38-38
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-0.9-0.8-0.9-0.9-0.9-1.2-1.0-1.0-1.0
Percentage of Revenues-1.2-0.9-0.8-0.9-0.9-0.9-1.2-1.0-1.0-1.0
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4498446546884731465943664286417940553932
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax101.2100.9100.8100.9100.9100.9101.2101.0101.0101.0
Percentage of Revenues101.2100.9100.8100.9100.9100.9101.2101.0101.0101.0
Percentage of Revenues us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, wrk:UnaffiliatedCustomers, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value15851513165016281647159716841649
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.734.235.534.735.736.939.739.9
Percentage of Revenues35.734.235.534.735.736.939.739.9
Percentage of Revenues us-gaap:OperatingSegments wrk:UnaffiliatedCustomers wrk:ConsumerPackaging0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wrk:UnaffiliatedCustomers, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value28612891300130532971271525132423
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.365.464.565.164.362.859.358.6
Percentage of Revenues64.365.464.565.164.362.859.358.6
Percentage of Revenues us-gaap:OperatingSegments wrk:UnaffiliatedCustomers wrk:CorrugatedPackaging0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wrk:UnaffiliatedCustomers, wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value018080133964
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.00.20.00.30.91.6
Percentage of Revenues0.00.40.00.20.00.30.91.6
Percentage of Revenues us-gaap:OperatingSegments wrk:UnaffiliatedCustomers wrk:LandAndDevelopment0.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-30-23-18-21-20-21-25-19-16-19
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-0.5-0.4-0.5-0.4-0.5-0.6-0.5-0.4-0.5
Percentage of Revenues-0.7-0.5-0.4-0.5-0.4-0.5-0.6-0.5-0.4-0.5
Percentage of Revenues us-gaap:IntersegmentElimination wrk:ConsumerPackaging0.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-20-18-18-19-19-18-24-21-22-19
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.4-0.4-0.4-0.4-0.4-0.6-0.5-0.5-0.5
Percentage of Revenues-0.5-0.4-0.4-0.4-0.4-0.4-0.6-0.5-0.5-0.5
Percentage of Revenues us-gaap:IntersegmentElimination wrk:CorrugatedPackaging0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1616153616681650166816181709166916371601
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.334.735.935.236.137.440.340.440.841.1
Percentage of Revenues36.334.735.935.236.137.440.340.440.841.1
Percentage of Revenues us-gaap:OperatingSegments wrk:ConsumerPackaging0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2882290930193072299027332537244423912319
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.865.864.965.564.763.259.959.159.559.6
Percentage of Revenues64.865.864.965.564.763.259.959.159.559.6
Percentage of Revenues us-gaap:OperatingSegments wrk:CorrugatedPackaging0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0180801339642611
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.00.20.00.30.91.60.70.3
Percentage of Revenues0.00.40.00.20.00.30.91.60.70.3
Percentage of Revenues us-gaap:OperatingSegments wrk:LandAndDevelopment0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementGeographical

us-gaap:IntersegmentElimination, srt:AsiaPacific



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value00000-1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.0-0.00.0-0.0
Percentage of Revenues-0.0-0.0-0.0-0.00.0-0.0
Percentage of Revenues us-gaap:IntersegmentElimination srt:AsiaPacific0.00.00.00.00.00.0

us-gaap:IntersegmentElimination, srt:NorthAmerica



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-51-41-36-41-39-37
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-0.9-0.8-0.9-0.9-0.9
Percentage of Revenues-1.2-0.9-0.8-0.9-0.9-0.9
Percentage of Revenues us-gaap:IntersegmentElimination srt:NorthAmerica0.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value161615361668165016681618
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.334.735.935.236.137.4
Percentage of Revenues36.334.735.935.236.137.4
Percentage of Revenues wrk:ConsumerPackaging0.00.00.00.00.00.0

wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value288229093019307229902733
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.865.864.965.564.763.2
Percentage of Revenues64.865.864.965.564.763.2
Percentage of Revenues wrk:CorrugatedPackaging0.00.00.00.00.00.0

wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value01808013
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.00.20.00.3
Percentage of Revenues0.00.40.00.20.00.3
Percentage of Revenues wrk:LandAndDevelopment0.00.00.00.00.00.0

us-gaap:StatementGeographical

srt:AsiaPacific



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7684908488100
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.91.91.81.92.3
Percentage of Revenues1.71.91.91.81.92.3
Percentage of Revenues srt:AsiaPacific0.00.00.00.00.00.0

srt:Europe



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value255246276259269269
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.85.65.95.55.86.2
Percentage of Revenues5.85.65.95.55.86.2
Percentage of Revenues srt:Europe0.00.00.00.00.00.0

srt:NorthAmerica



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value399539654147422741343829
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax89.989.689.290.189.588.5
Percentage of Revenues89.989.689.290.189.588.5
Percentage of Revenues srt:NorthAmerica0.00.00.00.00.00.0

srt:SouthAmerica



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value119127137117127128
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.72.92.92.52.83.0
Percentage of Revenues2.72.92.92.52.83.0
Percentage of Revenues srt:SouthAmerica0.00.00.00.00.00.0

us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

srt:AsiaPacific, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value627376707283
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.71.61.51.61.9
Percentage of Revenues1.41.71.61.51.61.9
Percentage of Revenues srt:AsiaPacific wrk:ConsumerPackaging0.00.00.00.00.00.0

srt:AsiaPacific, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value131114141518
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.30.30.30.4
Percentage of Revenues0.30.30.30.30.30.4
Percentage of Revenues srt:AsiaPacific wrk:CorrugatedPackaging0.00.00.00.00.00.0

srt:Europe, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value253244275259269269
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.55.95.55.86.2
Percentage of Revenues5.75.55.95.55.86.2
Percentage of Revenues srt:Europe wrk:ConsumerPackaging0.00.00.00.00.00.0

srt:Europe, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value2100
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.00.0
Percentage of Revenues0.10.00.00.0
Percentage of Revenues srt:Europe wrk:CorrugatedPackaging0.00.00.00.0

srt:NorthAmerica, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value128111981295130613081247
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.827.127.927.828.328.8
Percentage of Revenues28.827.127.927.828.328.8
Percentage of Revenues srt:NorthAmerica wrk:ConsumerPackaging0.00.00.00.00.00.0

srt:NorthAmerica, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value276527882888295428652606
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.263.062.163.062.060.2
Percentage of Revenues62.263.062.163.062.060.2
Percentage of Revenues srt:NorthAmerica wrk:CorrugatedPackaging0.00.00.00.00.00.0

srt:NorthAmerica, wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value01808013
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.00.20.00.3
Percentage of Revenues0.00.40.00.20.00.3
Percentage of Revenues srt:NorthAmerica wrk:LandAndDevelopment0.00.00.00.00.00.0

srt:SouthAmerica, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value182021141719
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.50.50.30.40.5
Percentage of Revenues0.40.50.50.30.40.5
Percentage of Revenues srt:SouthAmerica wrk:ConsumerPackaging0.00.00.00.00.00.0

srt:SouthAmerica, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value100107116102109108
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.42.52.22.42.5
Percentage of Revenues2.32.42.52.22.42.5
Percentage of Revenues srt:SouthAmerica wrk:CorrugatedPackaging0.00.00.00.00.00.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value44474423465146904620432742364137401738944060369536563447
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value36423614357237013720354532943264322031113282300029802855
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues81.981.776.878.980.581.977.878.980.279.980.881.281.582.8

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-654-618-693-619-657-197-688-673-651-191
Percentage of CostOfGoodsAndServicesSold-18.0-17.1-19.4-16.7-17.7-5.6-20.9-20.6-20.2-6.1
Percentage of Revenues-14.7-14.0-14.9-13.2-14.2-4.6-16.3-16.3-16.2-4.9
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value502481522475526500514529512445
Percentage of CostOfGoodsAndServicesSold13.813.314.612.914.214.115.616.215.914.3
Percentage of Revenues11.310.911.210.111.411.612.212.812.711.4
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3794375137433844385032423478341433662866
Percentage of CostOfGoodsAndServicesSold104.2103.8104.8103.9103.591.5105.6104.6104.592.1
Percentage of Revenues85.384.880.582.083.474.982.182.583.873.6
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit



Period End2020-03-312019-03-31
Value804899
Percentage of GrossProfit100.0100.0
Percentage of Revenues18.119.5

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-31
Value-8
Percentage of GrossProfit-1.0
Percentage of Revenues-0.2
Percentage of Revenues srt:ConsolidationEliminations0.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-03-31
Value128112
Percentage of GrossProfit16.012.5
Percentage of Revenues2.92.4
Percentage of Revenues srt:GuarantorSubsidiaries0.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-03-31
Value684787
Percentage of GrossProfit85.087.5
Percentage of Revenues15.417.0
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value27425249042130527751838528395
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.25.710.59.06.66.412.29.37.12.4

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-30
Value-8-8-9-9
Percentage of OperatingIncomeLoss-3.0-3.2-1.9-2.3
Percentage of Revenues-0.2-0.2-0.2-0.2
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7653221157183111966698
Percentage of OperatingIncomeLoss27.721.04.627.323.630.121.425.023.4103.6
Percentage of Revenues1.71.20.52.51.61.92.62.31.72.5
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2082094783172371933152912203
Percentage of OperatingIncomeLoss76.082.997.575.377.869.960.975.877.74.1
Percentage of Revenues4.74.710.36.85.14.57.47.15.50.1
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-2-1-1-1-40-3-3-2-7
Percentage of OperatingIncomeLoss-0.8-0.7-0.2-0.2-1.4-0.0-0.7-0.8-1.0-7.7
Percentage of Revenues-0.0-0.0-0.0-0.0-0.1-0.0-0.1-0.1-0.1-0.2
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-343-3-20912
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.0-0.10.10.1-0.1-0.1-0.00.20.00.1

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0139-35-10-17-821
Percentage of OtherNonoperatingIncomeExpense-22.2-29.7829.8-951.430.3-22.22983.3-91.8236.468.0
Percentage of Revenues0.00.00.8-0.8-0.00.0-0.4-0.20.10.0
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1-4-33381-21718-20
Percentage of OtherNonoperatingIncomeExpense133.3129.7-706.41051.4-33.3100.0-2883.3194.8-190.916.0
Percentage of Revenues-0.0-0.1-0.70.80.0-0.10.40.5-0.10.0
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-31
Value0
Percentage of OtherNonoperatingIncomeExpense-11.1
Percentage of Revenues0.0
Percentage of Revenues srt:ParentCompany0.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-343-3-20912
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.0-0.10.10.1-0.1-0.1-0.00.20.00.1
Percentage of Revenues us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value20618640133120920237535524360
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.64.28.67.14.54.78.98.66.11.5

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-247.4-270.6-280.6-151.3-251.6-274.5-119.2-123.9-152.9-3342.8
Percentage of Revenues-11.5-11.4-24.2-10.7-11.4-12.8-10.6-10.7-9.3-51.8
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value127130329-13168234169190139906
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest61.869.982.0-4.180.8115.745.253.457.21503.2
Percentage of Revenues2.92.97.1-0.33.75.44.04.63.523.3
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25926447939628124338634225935
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest125.6142.0119.2119.6134.4120.2102.996.1106.558.2
Percentage of Revenues5.86.010.38.46.15.69.18.36.50.9
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value148138310252160139-1200
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest71.674.577.476.276.768.7-3.2-0.2-0.0
Percentage of Revenues3.33.16.75.43.53.2-0.3-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1821564091971241412792652171134
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest88.484.2102.059.659.769.974.374.689.21881.4
Percentage of Revenues4.13.58.84.22.73.36.66.45.429.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Income Loss From Continuing Operations Attributable To Noncontrolling Entity

Nonoperating Income Expense

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5746-89774762-95-84-181073
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.31.1-1.91.71.01.4-2.3-2.0-0.527.6

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4-2-10101-1240-124
Percentage of IncomeTaxExpenseBenefit6.9-4.911.62.4-1.32.912.9-5.8-0.5-11.6
Percentage of Revenues0.1-0.1-0.20.0-0.00.0-0.30.10.0-3.2
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value71661209361751208325-948
Percentage of IncomeTaxExpenseBenefit123.0142.6-135.2120.6131.1120.9-126.1-98.3-133.0-88.3
Percentage of Revenues1.61.52.62.01.31.82.82.00.6-24.3
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-17-17-21-17-14-14-9-3-60
Percentage of IncomeTaxExpenseBenefit-29.9-37.623.5-23.1-29.9-23.810.04.133.5-0.1
Percentage of Revenues-0.4-0.4-0.5-0.4-0.3-0.3-0.2-0.1-0.2-0.0
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value304548833855-48392841
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.71.01.01.80.81.3-1.10.90.71.1

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value14813931225316113928027122411331953269878
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.33.26.75.43.53.26.66.65.629.14.88.82.72.3

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of ProfitLoss-343.5-360.9-360.8-197.5-325.0-397.6-159.8-162.6-165.7-177.8
Percentage of Revenues-11.5-11.4-24.2-10.7-11.4-12.8-10.6-10.7-9.3-51.8
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value123132339-151692321811851391030
Percentage of ProfitLoss83.194.9108.7-6.1104.7166.264.968.261.990.9
Percentage of Revenues2.83.07.3-0.33.75.44.34.53.526.5
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value188197358302219167265259234983
Percentage of ProfitLoss126.6141.9114.7119.2135.4120.095.095.5104.386.7
Percentage of Revenues4.24.57.76.54.73.96.36.35.825.2
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value148138310252160139-800
Percentage of ProfitLoss99.599.399.599.599.199.5-3.2-0.2-0.0
Percentage of Revenues3.33.16.75.43.53.2-0.2-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2001744302151381562882682231135
Percentage of ProfitLoss134.3124.8137.984.885.8111.9103.099.199.5100.1
Percentage of Revenues4.53.99.34.63.03.66.86.55.629.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-236246-6328218979258352791094
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-5.35.6-1.46.04.11.86.10.96.928.1

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value622-826-22-589-616-377-40215-502-1930
Percentage of ComprehensiveIncomeNetOfTax-263.9-335.534.9-208.4-325.2-474.7-155.542.4-180.1-176.3
Percentage of Revenues14.0-18.7-0.5-12.6-13.4-8.7-9.50.4-12.5-49.6
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-247236-2912201173160-38213985
Percentage of ComprehensiveIncomeNetOfTax105.096.046.34.2106.3217.661.9-107.376.690.0
Percentage of Revenues-5.65.3-0.60.34.44.03.8-0.95.325.3
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-190306-433224710724123288944
Percentage of ComprehensiveIncomeNetOfTax80.6124.47.1117.5130.2135.393.564.9103.586.3
Percentage of Revenues-4.36.9-0.17.15.32.55.70.67.224.3
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-236246-6328218979-800
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0-3.4-1.7-0.0
Percentage of Revenues-5.35.6-1.46.04.11.8-0.2-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1842835524416897267362791094
Percentage of ComprehensiveIncomeNetOfTax78.3115.2-88.486.688.7121.9103.4101.7100.0100.0
Percentage of Revenues-4.26.41.25.23.62.26.30.97.028.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value010110031-1
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.00.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.10.0-0.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-235247-6228419080258382801093
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-5.35.6-1.36.14.11.96.10.97.028.1

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value148138310252160139279268223113519632810380
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.33.16.75.43.53.26.66.55.629.14.88.92.82.3

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of NetIncomeLoss-345.3-363.5-362.7-198.5-328.0-399.6-160.0-164.4-166.6-177.6
Percentage of Revenues-11.5-11.4-24.2-10.7-11.4-12.8-10.6-10.7-9.3-51.8
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value123132339-151692321811851391030
Percentage of NetIncomeLoss83.595.6109.3-6.1105.7167.165.069.062.390.8
Percentage of Revenues2.83.07.3-0.33.75.44.34.53.526.5
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value187196356301217167265255232984
Percentage of NetIncomeLoss126.7142.2114.8119.3135.7120.195.095.4104.386.8
Percentage of Revenues4.24.57.76.44.73.96.36.25.825.3
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value148138310252160139-800
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0-3.2-0.2-0.0
Percentage of Revenues3.33.16.75.43.53.2-0.2-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2001744302151381562882682231135
Percentage of NetIncomeLoss135.0125.7138.685.286.6112.5103.2100.2100.0100.0
Percentage of Revenues4.53.99.34.63.03.66.86.55.629.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1483102521601392792682231134
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.36.75.43.53.26.66.55.629.1

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value148-76313271601392792682231134
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.3-16.428.33.53.26.66.55.629.1

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value011110031-1
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.10.0-0.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value011110031-1
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.10.0-0.0
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-100-100-2-11
Percentage of NetIncomeLossAttributableToNoncontrollingInterest-37.5-100.0-56.2-75.0-73.3-42.9125.0-83.9-84.6-68.8
Percentage of Revenues-0.0-0.0-0.0-0.0-0.0-0.00.0-0.1-0.00.0
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302016-09-30
Value309603093630156308123069330666253602508923038
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-56485-56259-55507-55106-53645-52816-32916
Percentage of Assets-182.4-181.9-184.1-178.8-174.8-172.2-129.8
Percentage of Assets-182.4-181.9-184.1-178.8-174.8-172.2-129.8
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value23953236582335923389233512357119031
Percentage of Assets77.476.577.575.976.176.975.0
Percentage of Assets77.476.577.575.976.176.975.0
Percentage of Assets srt:GuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value32202320293140731300307893035625153
Percentage of Assets104.0103.5104.1101.6100.399.099.2
Percentage of Assets104.0103.5104.1101.6100.399.099.2
Percentage of Assets srt:NonGuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1198312219119731203611797116073
Percentage of Assets38.739.539.739.138.437.90.0
Percentage of Assets38.739.539.739.138.437.90.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value19305192881892219191183991794814087
Percentage of Assets62.462.362.762.359.958.555.6
Percentage of Assets62.462.362.762.359.958.555.6
Percentage of Assets srt:SubsidiaryIssuer100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value3096030936301563081230693306662536025089
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-56485-56259-55507-55106-53645-52816-32916
Percentage of LiabilitiesAndStockholdersEquity-182.4-181.9-184.1-178.8-174.8-172.2-129.8
Percentage of Assets-182.4-181.9-184.1-178.8-174.8-172.2-129.8
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value23953236582335923389233512357119031
Percentage of LiabilitiesAndStockholdersEquity77.476.577.575.976.176.975.0
Percentage of Assets77.476.577.575.976.176.975.0
Percentage of Assets srt:GuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value32202320293140731300307893035625153
Percentage of LiabilitiesAndStockholdersEquity104.0103.5104.1101.6100.399.099.2
Percentage of Assets104.0103.5104.1101.6100.399.099.2
Percentage of Assets srt:NonGuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1198312219119731203611797116073
Percentage of LiabilitiesAndStockholdersEquity38.739.539.739.138.437.90.0
Percentage of Assets38.739.539.739.138.437.90.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value19305192881892219191183991794814087
Percentage of LiabilitiesAndStockholdersEquity62.462.362.762.359.958.555.6
Percentage of Assets62.462.362.762.359.958.555.6
Percentage of Assets srt:SubsidiaryIssuer100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value11482118251166911827116401160311469113931154711353103429728
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.138.238.738.437.937.845.20.00.00.041.242.2

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-50848-51407-50474-50458-49811-48910-28003
Percentage of StockholdersEquity-442.8-434.7-432.5-426.6-427.9-421.5-244.2
Percentage of Assets-164.2-166.2-167.4-163.8-162.3-159.5-110.4
Percentage of Assets srt:ConsolidationEliminations90.091.490.991.692.992.685.1

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value17162174111711117139169931645711731
Percentage of StockholdersEquity149.5147.2146.6144.9146.0141.8102.3
Percentage of Assets55.456.356.755.655.453.746.3
Percentage of Assets srt:GuarantorSubsidiaries71.673.673.373.372.869.861.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value22025221512186221874215762139116271
Percentage of StockholdersEquity191.8187.3187.3184.9185.3184.4141.9
Percentage of Assets71.171.672.571.070.369.864.2
Percentage of Assets srt:NonGuarantorSubsidiaries68.469.269.669.970.170.564.7

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value114821182511669118271164011603-9
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0-0.1
Percentage of Assets37.138.238.738.437.937.8-0.0
Percentage of Assets srt:ParentCompany95.896.897.598.398.7100.0-291.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value11661118441150011443112421106111479
Percentage of StockholdersEquity101.6100.298.596.896.695.3100.1
Percentage of Assets37.738.338.137.136.636.145.3
Percentage of Assets srt:SubsidiaryIssuer60.461.460.859.661.161.681.5

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value54924952497451935214522647854490
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.716.016.516.917.017.018.917.9

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2192-1460-1618-1280-695-768-1123
Percentage of AssetsCurrent-39.9-29.5-32.5-24.6-13.3-14.7-23.5
Percentage of Assets-7.1-4.7-5.4-4.2-2.3-2.5-4.4
Percentage of Assets srt:ConsolidationEliminations3.92.62.92.31.31.53.4

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value77130031528648810751223
Percentage of AssetsCurrent14.06.16.35.59.420.625.6
Percentage of Assets2.51.01.00.91.63.54.8
Percentage of Assets srt:GuarantorSubsidiaries3.21.31.31.22.14.66.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6534588960385531526648784656
Percentage of AssetsCurrent119.0118.9121.4106.5101.093.497.3
Percentage of Assets21.119.020.018.017.215.918.4
Percentage of Assets srt:NonGuarantorSubsidiaries20.318.419.217.717.116.118.5

srt:ParentCompany



Period End2020-03-312019-06-302019-03-312018-12-31
Value0000
Percentage of AssetsCurrent0.00.00.00.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3782232396551543928
Percentage of AssetsCurrent6.94.54.812.63.00.80.6
Percentage of Assets1.20.70.82.10.50.10.1
Percentage of Assets srt:SubsidiaryIssuer2.01.21.33.40.80.20.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value640156151179154260636298
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.10.50.50.60.50.92.51.2

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value469817121950490
Percentage of CashAndCashEquivalentsAtCarryingValue73.45.611.77.012.719.377.1
Percentage of Assets1.50.00.10.00.10.21.9
Percentage of Assets srt:GuarantorSubsidiaries2.00.00.10.10.10.22.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value170147133166134210145
Percentage of CashAndCashEquivalentsAtCarryingValue26.694.488.393.087.380.722.9
Percentage of Assets0.60.50.40.50.40.70.6
Percentage of Assets srt:NonGuarantorSubsidiaries0.50.50.40.50.40.70.6

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value22222061219323982367231520101886
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.26.77.37.87.77.67.97.5

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-33-30-39-32-33-26-26
Percentage of AccountsReceivableNetCurrent-1.5-1.5-1.8-1.4-1.4-1.1-1.3
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets srt:ConsolidationEliminations0.10.10.10.10.10.00.1

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value26163125182176196
Percentage of AccountsReceivableNetCurrent1.20.81.41.17.77.69.8
Percentage of Assets0.10.10.10.10.60.60.8
Percentage of Assets srt:GuarantorSubsidiaries0.10.10.10.10.80.71.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2229207622012404221721651840
Percentage of AccountsReceivableNetCurrent100.3100.7100.4100.393.793.591.5
Percentage of Assets7.26.77.37.87.27.17.3
Percentage of Assets srt:NonGuarantorSubsidiaries6.96.57.07.77.27.17.3

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value21252189210720742096210118291797
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.97.17.06.76.86.97.27.2

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value266266254241254240233
Percentage of InventoryNet12.512.112.111.612.211.412.8
Percentage of Assets0.90.90.80.80.80.80.9
Percentage of Assets srt:GuarantorSubsidiaries1.11.11.11.01.11.01.2

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1859192318531832184218611596
Percentage of InventoryNet87.587.987.988.487.888.687.2
Percentage of Assets6.06.26.15.96.06.16.3
Percentage of Assets srt:NonGuarantorSubsidiaries5.86.05.95.96.06.16.3

Inventory Finished Goods And Work In Process

us-gaap:InventoryFinishedGoodsAndWorkInProcess



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value9821000938930956921867905
Percentage of InventoryFinishedGoodsAndWorkInProcess100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.23.13.03.13.03.43.6

Inventory L I F O Reserve

us-gaap:InventoryLIFOReserve



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value11812012915016414513582
Percentage of InventoryLIFOReserve100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.50.50.50.50.3

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value501537496515562508248329
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.71.61.71.81.71.01.3

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value7811681117
Percentage of OtherAssetsCurrent1.41.62.41.31.52.26.9
Percentage of Assets0.00.00.00.00.00.00.1
Percentage of Assets srt:GuarantorSubsidiaries0.00.00.10.00.00.00.1

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value493528483508553497230
Percentage of OtherAssetsCurrent98.598.497.498.598.397.892.9
Percentage of Assets1.61.71.61.61.81.60.9
Percentage of Assets srt:NonGuarantorSubsidiaries1.51.71.51.61.81.60.9

srt:ParentCompany



Period End2020-03-312019-06-302019-03-312018-12-31
Value0000
Percentage of OtherAssetsCurrent0.10.00.10.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.0

Noncurrent Assets

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1766417811174611721116848165311441913682
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.157.657.955.954.953.956.954.5

us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LandAndBuilding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value24912476244224392360234920782034
Percentage of PropertyPlantAndEquipmentGross14.113.914.014.214.014.214.414.9
Percentage of Assets8.08.08.17.97.77.78.28.1
Percentage of Assets us-gaap:LandAndBuilding0.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value10210110099100998859
Percentage of PropertyPlantAndEquipmentGross0.60.60.60.60.60.60.60.4
Percentage of Assets0.30.30.30.30.30.30.40.2
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.0

us-gaap:MachineryAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1492115057147431448714206138891206411349
Percentage of PropertyPlantAndEquipmentGross84.584.584.484.284.384.083.783.0
Percentage of Assets48.248.748.947.046.345.347.645.2
Percentage of Assets us-gaap:MachineryAndEquipment0.00.00.00.00.00.00.00.0

us-gaap:TransportationEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value2830313131303030
Percentage of PropertyPlantAndEquipmentGross0.20.20.20.20.20.20.20.2
Percentage of Assets0.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:TransportationEquipment0.00.00.00.00.00.00.00.0

wrk:ForestLandsAndMineralRights



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value120146144152149162158208
Percentage of PropertyPlantAndEquipmentGross0.70.80.80.90.91.01.11.5
Percentage of Assets0.40.50.50.50.50.50.60.8
Percentage of Assets wrk:ForestLandsAndMineralRights0.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value66286530627160415818556253374564
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.421.120.819.619.018.121.018.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value11036112811118911169110291096990829118
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.636.537.136.235.935.835.836.3

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value15151819222121
Percentage of PropertyPlantAndEquipmentNet0.10.10.20.20.20.20.2
Percentage of Assets0.00.00.10.10.10.10.1
Percentage of Assets srt:GuarantorSubsidiaries0.10.10.10.10.10.10.1

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1102111265111701115011007109479061
Percentage of PropertyPlantAndEquipmentNet99.999.999.899.899.899.899.8
Percentage of Assets35.636.437.036.235.935.735.7
Percentage of Assets srt:NonGuarantorSubsidiaries34.235.235.635.635.736.136.0

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-302016-09-30
Value726473277285732173007320557755284778
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.523.724.223.823.823.922.022.020.7

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1158115811581151115111511151
Percentage of Goodwill15.915.815.915.715.815.720.6
Percentage of Assets3.73.73.83.73.83.84.5
Percentage of Assets srt:GuarantorSubsidiaries4.84.95.04.94.94.96.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6105616861276170614961694426
Percentage of Goodwill84.184.284.184.384.284.379.4
Percentage of Assets19.719.920.320.020.020.117.5
Percentage of Assets srt:NonGuarantorSubsidiaries19.019.319.519.720.020.317.6

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value38453968405941744277435231223329
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.412.813.513.513.914.212.313.3

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1434145814851511153715631589
Percentage of IntangibleAssetsNetExcludingGoodwill37.336.836.636.235.935.950.9
Percentage of Assets4.64.74.94.95.05.16.3
Percentage of Assets srt:GuarantorSubsidiaries6.06.26.46.56.66.68.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2411250925742663274027881532
Percentage of IntangibleAssetsNetExcludingGoodwill62.763.263.463.864.164.149.1
Percentage of Assets7.88.18.58.68.99.16.0
Percentage of Assets srt:NonGuarantorSubsidiaries7.57.88.28.58.99.26.1

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1772187811481213114510911092966
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.76.13.83.93.73.64.33.9

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-91-64-76-10-9-8-7
Percentage of OtherAssetsNoncurrent-5.2-3.4-6.6-0.9-0.8-0.8-0.7
Percentage of Assets-0.3-0.2-0.3-0.0-0.0-0.0-0.0
Percentage of Assets srt:ConsolidationEliminations0.20.10.10.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value241232185190181163172
Percentage of OtherAssetsNoncurrent13.612.416.115.715.815.015.8
Percentage of Assets0.80.80.60.60.60.50.7
Percentage of Assets srt:GuarantorSubsidiaries1.01.00.80.80.80.70.9

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value155316409711018959922910
Percentage of OtherAssetsNoncurrent87.787.384.684.083.884.683.4
Percentage of Assets5.05.33.23.33.13.03.6
Percentage of Assets srt:NonGuarantorSubsidiaries4.85.13.13.33.13.03.6

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value69696715141312
Percentage of OtherAssetsNoncurrent3.93.75.91.21.21.31.1
Percentage of Assets0.20.20.20.00.00.00.0
Percentage of Assets srt:SubsidiaryIssuer0.40.40.40.10.10.10.1

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value31393446343535904046372933333009
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.111.111.411.713.212.213.112.0

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2192-1460-1618-1280-695-768-1123
Percentage of LiabilitiesCurrent-69.8-42.4-47.1-35.6-17.2-20.6-33.7
Percentage of Assets-7.1-4.7-5.4-4.2-2.3-2.5-4.4
Percentage of Assets srt:ConsolidationEliminations3.92.62.92.31.31.53.4

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value181412771291132074811401413
Percentage of LiabilitiesCurrent57.837.137.636.818.530.642.4
Percentage of Assets5.94.14.34.32.43.75.6
Percentage of Assets srt:GuarantorSubsidiaries7.65.45.55.63.24.87.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2782305032932938291827062617
Percentage of LiabilitiesCurrent88.688.595.981.872.172.678.5
Percentage of Assets9.09.910.99.59.58.810.3
Percentage of Assets srt:NonGuarantorSubsidiaries8.69.510.59.49.58.910.4

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value501394303209157413
Percentage of LiabilitiesCurrent16.011.48.85.83.90.10.4
Percentage of Assets1.61.31.00.70.50.00.1
Percentage of Assets srt:ParentCompany4.23.22.51.71.30.0391.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value234185165402918647413
Percentage of LiabilitiesCurrent7.55.44.811.222.717.412.4
Percentage of Assets0.80.60.51.33.02.11.6
Percentage of Assets srt:SubsidiaryIssuer1.21.00.92.15.03.62.9

Debt Current

us-gaap:DebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value43256556177914221092740608
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.81.92.54.63.62.92.4

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value106107108110603607609
Percentage of DebtCurrent24.619.019.414.242.455.682.3
Percentage of Assets0.30.30.40.42.02.02.4
Percentage of Assets srt:GuarantorSubsidiaries0.40.50.50.52.62.63.2

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value146330316314413257131
Percentage of DebtCurrent33.958.556.540.429.023.617.7
Percentage of Assets0.51.11.11.01.30.80.5
Percentage of Assets srt:NonGuarantorSubsidiaries0.51.01.01.01.30.80.5

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value179127135354405228
Percentage of DebtCurrent41.622.524.145.528.520.9
Percentage of Assets0.60.40.41.11.30.7
Percentage of Assets srt:SubsidiaryIssuer0.90.70.71.82.21.3

Long Term Debt Current

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtCurrent

wrk:CooperatieveRabobankUANewYorkBranchRevolvingLineofCredit, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-30
Value0155175
Percentage of LongTermDebtCurrent0.0100.0100.0
Percentage of Assets0.00.50.6
Percentage of Assets wrk:CooperatieveRabobankUANewYorkBranchRevolvingLineofCredit us-gaap:UnsecuredDebt0.00.00.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value16961781183117061702167917161492
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.55.86.15.55.55.56.85.9

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-33-30-39-32-33-26-26
Percentage of AccountsPayableCurrent-2.0-1.7-2.2-1.9-2.0-1.6-1.5
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets srt:ConsolidationEliminations0.10.10.10.10.10.00.1

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value33283132343640
Percentage of AccountsPayableCurrent2.01.61.71.92.02.22.3
Percentage of Assets0.10.10.10.10.10.10.2
Percentage of Assets srt:GuarantorSubsidiaries0.10.10.10.10.10.20.2

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1695178118391705169916631701
Percentage of AccountsPayableCurrent99.9100.1100.499.999.999.199.1
Percentage of Assets5.55.86.15.55.55.46.7
Percentage of Assets srt:NonGuarantorSubsidiaries5.35.65.95.45.55.56.8

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1101150
Percentage of AccountsPayableCurrent0.10.10.00.10.10.30.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets srt:SubsidiaryIssuer0.00.00.00.00.00.00.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value629725571676541592476492
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.31.92.21.81.91.92.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value77112831299912977
Percentage of OtherLiabilitiesCurrent12.315.514.719.118.321.916.3
Percentage of Assets0.30.40.30.40.30.40.3
Percentage of Assets srt:GuarantorSubsidiaries0.30.50.40.60.40.60.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value528566469500435430395
Percentage of OtherLiabilitiesCurrent83.978.182.174.080.472.683.0
Percentage of Assets1.71.81.61.61.41.41.6
Percentage of Assets srt:NonGuarantorSubsidiaries1.61.81.51.61.41.41.6

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value234618477323
Percentage of OtherLiabilitiesCurrent3.86.43.37.01.35.50.7
Percentage of Assets0.10.10.10.20.00.10.0
Percentage of Assets srt:SubsidiaryIssuer0.10.20.10.20.00.20.0

Long Term Debt

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebt

us-gaap:RevolvingCreditFacility, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-30
Value35000
Percentage of LongTermDebt100.00.00.0
Percentage of Assets1.10.00.0
Percentage of Assets us-gaap:RevolvingCreditFacility us-gaap:UnsecuredDebt0.00.00.0

wrk:CooperatieveRabobankUANewYorkBranchRevolvingLineofCredit, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302018-09-30
Value310330350370355
Percentage of LongTermDebt88.60.00.00.00.0
Percentage of Assets1.01.11.21.21.4
Percentage of Assets wrk:CooperatieveRabobankUANewYorkBranchRevolvingLineofCredit us-gaap:UnsecuredDebt0.00.00.00.00.0

wrk:ReceivablesSecuritizationFacility, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302018-09-30
Value4755000
Percentage of LongTermDebt135.70.00.00.0
Percentage of Assets1.50.20.00.0
Percentage of Assets wrk:ReceivablesSecuritizationFacility us-gaap:SecuredDebt0.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value104249649950297599373972856745946
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.731.231.531.730.531.722.423.7

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value28782891287829652955293223213410
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.39.39.59.69.69.69.213.6

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-91-64-76-10-9-8-7
Percentage of DeferredTaxLiabilitiesNoncurrent-3.2-2.2-2.6-0.4-0.3-0.3-0.3
Percentage of Assets-0.3-0.2-0.3-0.0-0.0-0.0-0.0
Percentage of Assets srt:ConsolidationEliminations0.20.10.10.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value265252278255267275291
Percentage of DeferredTaxLiabilitiesNoncurrent9.28.79.78.69.09.412.5
Percentage of Assets0.90.80.90.80.90.91.1
Percentage of Assets srt:GuarantorSubsidiaries1.11.11.21.11.11.21.5

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2704270326752721269726662037
Percentage of DeferredTaxLiabilitiesNoncurrent94.093.593.091.791.390.987.8
Percentage of Assets8.78.78.98.88.88.78.0
Percentage of Assets srt:NonGuarantorSubsidiaries8.48.48.58.78.88.88.1

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1515141312111343
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.00.10.2

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value15151413121113
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.00.1
Percentage of Assets srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.1

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value145015131053111611191113994737
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.74.93.53.63.63.63.92.9

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value176178131133135130106
Percentage of OtherLiabilitiesNoncurrent12.211.812.412.012.111.710.7
Percentage of Assets0.60.60.40.40.40.40.4
Percentage of Assets srt:GuarantorSubsidiaries0.70.80.60.60.60.60.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value12611321909968969967872
Percentage of OtherLiabilitiesNoncurrent87.087.386.386.786.686.987.7
Percentage of Assets4.14.33.03.13.23.23.4
Percentage of Assets srt:NonGuarantorSubsidiaries3.94.12.93.13.13.23.5

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value12121214141516
Percentage of OtherLiabilitiesNoncurrent0.90.91.21.31.31.41.6
Percentage of Assets0.00.00.00.00.00.10.1
Percentage of Assets srt:SubsidiaryIssuer0.10.10.10.10.10.10.1

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value11482118251166911827116401160311469113931154711353103429728
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.138.238.738.437.937.845.20.00.00.041.242.2

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-50848-51407-50474-50458-49811-48910-28003
Percentage of StockholdersEquity-442.8-434.7-432.5-426.6-427.9-421.5-244.2
Percentage of Assets-164.2-166.2-167.4-163.8-162.3-159.5-110.4
Percentage of Assets srt:ConsolidationEliminations90.091.490.991.692.992.685.1

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value17162174111711117139169931645711731
Percentage of StockholdersEquity149.5147.2146.6144.9146.0141.8102.3
Percentage of Assets55.456.356.755.655.453.746.3
Percentage of Assets srt:GuarantorSubsidiaries71.673.673.373.372.869.861.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value22025221512186221874215762139116271
Percentage of StockholdersEquity191.8187.3187.3184.9185.3184.4141.9
Percentage of Assets71.171.672.571.070.369.864.2
Percentage of Assets srt:NonGuarantorSubsidiaries68.469.269.669.970.170.564.7

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value114821182511669118271164011603-9
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0-0.1
Percentage of Assets37.138.238.738.437.937.8-0.0
Percentage of Assets srt:ParentCompany95.896.897.598.398.7100.0-291.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value11661118441150011443112421106111479
Percentage of StockholdersEquity101.6100.298.596.896.695.3100.1
Percentage of Assets37.738.338.137.136.636.145.3
Percentage of Assets srt:SubsidiaryIssuer60.461.460.859.661.161.681.5

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value11498118401168411841116531161511482114121158211393103869830
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.138.338.738.438.037.945.30.00.00.041.442.7

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-50848-51407-50474-50458-49811-48910-28003
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-442.2-434.2-432.0-426.1-427.4-421.1-243.9
Percentage of Assets-164.2-166.2-167.4-163.8-162.3-159.5-110.4
Percentage of Assets srt:ConsolidationEliminations90.091.490.991.692.992.685.1

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value17162174111711117139169931645711731
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest149.3147.1146.4144.7145.8141.7102.2
Percentage of Assets55.456.356.755.655.453.746.3
Percentage of Assets srt:GuarantorSubsidiaries71.673.673.373.372.869.861.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value22040221662187621888215882140316284
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest191.7187.2187.2184.8185.3184.3141.8
Percentage of Assets71.271.772.571.070.369.864.2
Percentage of Assets srt:NonGuarantorSubsidiaries68.469.269.769.970.170.564.7

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value114821182511669118271164011603-9
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest99.999.999.999.999.999.9-0.1
Percentage of Assets37.138.238.738.437.937.8-0.0
Percentage of Assets srt:ParentCompany95.896.897.598.398.7100.0-291.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value11661118441150011443112421106111479
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest101.4100.098.496.696.595.2100.0
Percentage of Assets37.738.338.137.136.636.145.3
Percentage of Assets srt:SubsidiaryIssuer60.461.460.859.661.161.681.5

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value-1419-1034-1069-695-725-754-695-674-441-497-457-626-780
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-12.3-8.7-9.2-5.9-6.2-6.5-6.1-5.9-3.8-4.4-4.4-6.40.0
Percentage of Assets-4.6-3.3-3.5-2.3-2.4-2.5-2.70.00.00.0-1.8-2.70.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value10784107701073910715106921072010588106371068410651106241045810767
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest93.891.091.990.591.892.392.293.292.393.5102.3106.40.0
Percentage of Assets34.834.835.634.834.835.041.80.00.00.042.345.40.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value2222222222222
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value1515141312111319344043101132
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.10.10.10.10.20.30.40.41.00.0
Percentage of Assets0.10.00.00.00.00.00.10.00.00.00.20.40.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value2114208719971805167116351573142713021196172-1051661
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest18.417.617.115.214.314.113.712.511.210.51.7-1.10.0
Percentage of Assets6.86.76.65.95.45.36.20.00.00.00.7-0.50.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value22222222
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1078410770107391071510692107201058810624
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.834.835.634.834.835.041.842.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value2114208719971805167116351573172
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.86.76.65.95.45.36.20.7

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value-1419-1034-1069-695-725-754-695-674-441-497-457-626
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.6-3.3-3.5-2.3-2.4-2.5-2.70.00.00.0-1.8-2.7

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value-752-762-698-452-457-460-465-454-458-462-462-523
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax53.173.765.365.063.061.067.067.3103.992.8101.183.6
Percentage of Assets-2.4-2.5-2.3-1.5-1.5-1.5-1.80.00.00.0-1.8-2.3
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value-7-10000000000
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.50.1-0.10.00.00.00.00.00.00.10.20.0
Percentage of Assets-0.0-0.00.0-0.0-0.0-0.0-0.00.00.00.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value-658-271-371-242-268-294-229-22017-365-102
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax46.426.234.834.937.039.033.032.6-3.97.4-1.116.3
Percentage of Assets-2.1-0.9-1.2-0.8-0.9-1.0-0.90.00.00.00.0-0.4
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value1515141312111343
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.00.10.2

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value15151413121113
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.00.1
Percentage of Assets srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1674319107343613031285661228245
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.89.719.615.77.87.030.316.05.76.3

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value460-17-3642322-519308336-195-73
Percentage of NetCashProvidedByUsedInOperatingActivities274.9-4.0-0.487.589.0-171.224.050.8-85.5-30.0
Percentage of Revenues10.4-0.4-0.113.77.0-12.07.38.1-4.9-1.9
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-213335498-173441163282-8071292248
Percentage of NetCashProvidedByUsedInOperatingActivities-127.577.854.7-23.612.4383.922.0-122.0566.0101.4
Percentage of Revenues-4.87.610.7-3.71.026.96.7-19.532.26.4
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12210410711117114700
Percentage of NetCashProvidedByUsedInOperatingActivities73.324.211.815.247.448.60.00.0
Percentage of Revenues2.82.42.32.43.73.40.00.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-2028308-419-17683204847-598110
Percentage of NetCashProvidedByUsedInOperatingActivities-120.71.933.9-57.0-48.927.515.9128.0-262.144.8
Percentage of Revenues-4.50.26.6-8.9-3.81.94.820.5-14.92.8
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-228-360-378-350-277-3572-755-102-250-190
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-5.1-8.2-8.1-7.5-6.0-82.6-17.8-2.5-6.2-4.9

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-3-2-730-26081745-746-83
Percentage of NetCashProvidedByUsedInInvestingActivities0.00.80.620.90.273.0-0.2-725.4298.043.9
Percentage of Revenues-0.0-0.1-0.1-1.6-0.0-60.30.018.0-18.6-2.1
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0862242-9-41544384
Percentage of NetCashProvidedByUsedInInvestingActivities-0.0-2.2-1.8-6.4-1.7-0.11.3404.3-177.2-44.2
Percentage of Revenues0.00.20.10.50.10.1-0.2-10.011.12.2
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-228-365-383-299-281149-260168-549-191
Percentage of NetCashProvidedByUsedInInvestingActivities100.0101.4101.285.5101.4-4.234.5-164.1219.2100.3
Percentage of Revenues-5.1-8.3-8.2-6.4-6.13.4-6.24.1-13.7-4.9
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value568-61-559-365-1912896-335-356-16-45
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues12.8-1.4-12.0-7.8-4.266.9-7.9-8.6-0.4-1.2

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value032-49903180-1-10301020123
Percentage of NetCashProvidedByUsedInFinancingActivities0.0-4.9-0.4136.7-0.3109.80.4288.8-6075.6-271.6
Percentage of Revenues0.00.10.1-10.60.073.5-0.0-24.925.43.2
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value48848-147498159-1245-130672-757-53
Percentage of NetCashProvidedByUsedInFinancingActivities86.0-79.126.4-136.6-83.4-43.039.0-188.34511.3118.2
Percentage of Revenues11.01.1-3.210.63.5-28.8-3.116.2-18.9-1.4
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-122-104-107-111-17141500
Percentage of NetCashProvidedByUsedInFinancingActivities-21.6170.519.230.689.514.30.0-0.0
Percentage of Revenues-2.8-2.4-2.3-2.4-3.79.6-0.00.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value202-8-308419176470-202-246-3-109
Percentage of NetCashProvidedByUsedInFinancingActivities35.613.555.2-114.7-92.216.260.169.119.0240.7
Percentage of Revenues4.6-0.2-6.68.93.810.9-4.8-6.0-0.1-2.8
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1674319107343613031285661228245
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.89.719.615.77.87.030.316.05.76.3

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value460-17-3642322-519308336-195-73
Percentage of NetCashProvidedByUsedInOperatingActivities274.9-4.0-0.487.589.0-171.224.050.8-85.5-30.0
Percentage of Revenues10.4-0.4-0.113.77.0-12.07.38.1-4.9-1.9
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-213335498-173441163282-8071292248
Percentage of NetCashProvidedByUsedInOperatingActivities-127.577.854.7-23.612.4383.922.0-122.0566.0101.4
Percentage of Revenues-4.87.610.7-3.71.026.96.7-19.532.26.4
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12210410711117114700
Percentage of NetCashProvidedByUsedInOperatingActivities73.324.211.815.247.448.60.00.0
Percentage of Revenues2.82.42.32.43.73.40.00.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-2028308-419-17683204847-598110
Percentage of NetCashProvidedByUsedInOperatingActivities-120.71.933.9-57.0-48.927.515.9128.0-262.144.8
Percentage of Revenues-4.50.26.6-8.9-3.81.94.820.5-14.92.8
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value148138310252160139279268223113519632810380
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.33.16.75.43.53.26.66.55.629.14.88.92.82.3

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of NetIncomeLoss-345.3-363.5-362.7-198.5-328.0-399.6-160.0-164.4-166.6-177.6
Percentage of Revenues-11.5-11.4-24.2-10.7-11.4-12.8-10.6-10.7-9.3-51.8
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value123132339-151692321811851391030
Percentage of NetIncomeLoss83.595.6109.3-6.1105.7167.165.069.062.390.8
Percentage of Revenues2.83.07.3-0.33.75.44.34.53.526.5
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value187196356301217167265255232984
Percentage of NetIncomeLoss126.7142.2114.8119.3135.7120.195.095.4104.386.8
Percentage of Revenues4.24.57.76.44.73.96.36.25.825.3
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value148138310252160139-800
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0-3.2-0.2-0.0
Percentage of Revenues3.33.16.75.43.53.2-0.2-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2001744302151381562882682231135
Percentage of NetIncomeLoss135.0125.7138.685.286.6112.5103.2100.2100.0100.0
Percentage of Revenues4.53.99.34.63.03.66.86.55.629.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value14813931225316113928027122411331953269878
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.33.26.75.43.53.26.66.65.629.14.88.82.72.3

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of ProfitLoss-343.5-360.9-360.8-197.5-325.0-397.6-159.8-162.6-165.7-177.8
Percentage of Revenues-11.5-11.4-24.2-10.7-11.4-12.8-10.6-10.7-9.3-51.8
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value123132339-151692321811851391030
Percentage of ProfitLoss83.194.9108.7-6.1104.7166.264.968.261.990.9
Percentage of Revenues2.83.07.3-0.33.75.44.34.53.526.5
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value188197358302219167265259234983
Percentage of ProfitLoss126.6141.9114.7119.2135.4120.095.095.5104.386.7
Percentage of Revenues4.24.57.76.54.73.96.36.35.825.2
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value148138310252160139-800
Percentage of ProfitLoss99.599.399.599.599.199.5-3.2-0.2-0.0
Percentage of Revenues3.33.16.75.43.53.2-0.2-0.0-0.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2001744302151381562882682231135
Percentage of ProfitLoss134.3124.8137.984.885.8111.9103.099.199.5100.1
Percentage of Revenues4.53.99.34.63.03.66.86.55.629.1
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value374381383385383359314315316306
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-03-312018-12-31
Value1112
Percentage of DepreciationDepletionAndAmortization0.50.40.50.6

wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-03-312018-12-31
Value133135139138
Percentage of DepreciationDepletionAndAmortization35.635.536.338.6

wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-03-312018-12-31
Value239244242218
Percentage of DepreciationDepletionAndAmortization64.064.163.360.8

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-208371-28-37131-42974
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-228-360-378-350-277-3572-755-102-250-190
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-5.1-8.2-8.1-7.5-6.0-82.6-17.8-2.5-6.2-4.9

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-3-2-730-26081745-746-83
Percentage of NetCashProvidedByUsedInInvestingActivities0.00.80.620.90.273.0-0.2-725.4298.043.9
Percentage of Revenues-0.0-0.1-0.1-1.6-0.0-60.30.018.0-18.6-2.1
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0862242-9-41544384
Percentage of NetCashProvidedByUsedInInvestingActivities-0.0-2.2-1.8-6.4-1.7-0.11.3404.3-177.2-44.2
Percentage of Revenues0.00.20.10.50.10.1-0.2-10.011.12.2
Percentage of Revenues srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-228-365-383-299-281149-260168-549-191
Percentage of NetCashProvidedByUsedInInvestingActivities100.0101.4101.285.5101.4-4.234.5-164.1219.2100.3
Percentage of Revenues-5.1-8.3-8.2-6.4-6.13.4-6.24.1-13.7-4.9
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value568-61-559-365-1912896-335-356-16-45
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues12.8-1.4-12.0-7.8-4.266.9-7.9-8.6-0.4-1.2

us-gaap:ConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value032-49903180-1-10301020123
Percentage of NetCashProvidedByUsedInFinancingActivities0.0-4.9-0.4136.7-0.3109.80.4288.8-6075.6-271.6
Percentage of Revenues0.00.10.1-10.60.073.5-0.0-24.925.43.2
Percentage of Revenues srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value48848-147498159-1245-130672-757-53
Percentage of NetCashProvidedByUsedInFinancingActivities86.0-79.126.4-136.6-83.4-43.039.0-188.34511.3118.2
Percentage of Revenues11.01.1-3.210.63.5-28.8-3.116.2-18.9-1.4
Percentage of Revenues srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-122-104-107-111-17141500
Percentage of NetCashProvidedByUsedInFinancingActivities-21.6170.519.230.689.514.30.0-0.0
Percentage of Revenues-2.8-2.4-2.3-2.4-3.79.6-0.00.0
Percentage of Revenues srt:ParentCompany0.00.00.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value202-8-308419176470-202-246-3-109
Percentage of NetCashProvidedByUsedInFinancingActivities35.613.555.2-114.7-92.216.260.169.119.0240.7
Percentage of Revenues4.6-0.2-6.68.93.810.9-4.8-6.0-0.1-2.8
Percentage of Revenues srt:SubsidiaryIssuer0.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value120120117117117116111110109109
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value120120117117117116
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.280.250.2340.2260.310.2370.077-17.798
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0

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

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

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15131215181717151914
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-31
Value683696
Percentage of OperatingLeaseRightOfUseAsset100.0100.0

Cash And Cash Equivalents Period Increase Decrease

us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16131215181717151914
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302017-12-31
Value1011000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000032427351
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000032427351
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationIntegrationRelatedCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value851110740649
Percentage of BusinessCombinationIntegrationRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value851110746649
Percentage of BusinessCombinationIntegrationRelatedCosts100.0100.0100.0100.0100.0100.01000.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4834-2724-106-376184180-398
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value460-95-7-30-440297169-234
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect95.3-189.6-19.3-28.528.9117.1161.393.959.659.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2213-3232-7564-11311-152
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect4.7289.6119.3128.571.1-17.1-61.56.139.134.9

us-gaap:CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value612606529485485470390399414369
Percentage of CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.4650.4650.455000000000000070.4550.4550.4550.429999999999999940.430.430.43
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value830-32514936011-1234
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000000000
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-11-11-5-6-5-7-5-6-4-4
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-5900.0-5950.0-1160.0-900.0-1350.0-1750.05300.02233.3-4600.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000000-1-1-1-1
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2111111111
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-300.0-200.0-185.7-185.7-185.7-185.7-100.0-118.2-110.0-100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value12212222
Percentage of DefinedBenefitPlanContributionsByEmployer100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value4865410128
Percentage of DefinedBenefitPlanContributionsByEmployer241.2425.0300.0323.5148.1469.6610.0303.6

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanCurtailments

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-06-302019-03-31
Value400000.0100000.0900000.0
Percentage of DefinedBenefitPlanCurtailments100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value90908585858281828282
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1111211222
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value49495858585650515150
Percentage of DefinedBenefitPlanInterestCost2750.02772.23084.23094.72935.02973.72827.82452.42565.02545.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1110110111
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-12-14-7-10-8-7-198-8-12166
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-1033.3-1092.3-645.5-1528.6-675.0-636.4-22022.2-517.6-976.912838.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000000000
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1413101011101191211
Percentage of DefinedBenefitPlanServiceCost4733.33275.02575.05100.03800.03633.33766.72350.03125.02900.0

us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStockCash

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value121121118118124117111112111110
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-23-4051-3-4-220-1
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-23-4051-3-4-2200
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0102.4100.0100.090.0

us-gaap:FinanceLeaseInterestExpense



Period End2020-03-31
Value2
Percentage of FinanceLeaseInterestExpense100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization



Period End2020-03-31
Value2
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0

us-gaap:GainLossOnDispositionOfAssets1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value513-6043-3-2-2-1
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value0000000
Percentage of GainLossOnDispositionOfAssets1-1.87.70.01.52.9-0.03.6

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value513-6043-3-2-2-1
Percentage of GainLossOnDispositionOfAssets1101.892.3100.098.50.0100.097.1100.096.4100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value503-6243-2-1
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnExtinguishmentOfDebt



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-30-1000-1020
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value000000000
Percentage of GainsLossesOnExtinguishmentOfDebt20.0-0.03.10.05.3100.0-11.1-100.010.0

srt:SubsidiaryIssuer



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000-10000
Percentage of GainsLossesOnExtinguishmentOfDebt80.0100.025.00.094.7-200.00.0-700.090.0

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us-gaap:CorporateNonSegment



Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0-30-100-1
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value431106215113
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value431106210111
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.067.7100.034.2

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-59-4787175-1481915622-89
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value214-153-1792352-169-30414926828
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-65-35-61127-32-87-8116-8-78
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value20-236-2-15-1147-10-24118
Percentage of IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6171-474211117-976359-3
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNonoperatingNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-97-93-114-111-111-94-74-76-78-64
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-33-35-34-36-42-49-42-43-43-44
Percentage of InterestIncomeExpenseNonoperatingNet34.537.630.433.237.652.957.856.155.668.2

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value06-11-7-42-8-11-6-5
Percentage of InterestIncomeExpenseNonoperatingNet-0.1-6.89.76.94.3-2.610.815.07.88.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-63-64-68-66-65-47-11-21-28-15
Percentage of InterestIncomeExpenseNonoperatingNet65.669.259.959.958.149.815.428.236.523.6

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-97-93-114-111-111-94-74-76-78-64
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1515316247177251331610727
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost



Period End2020-03-31
Value81
Percentage of LeaseCost100.0

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-26100000.0-26700000.0-19300000.0-18900000.0-18700000.0-17300000.0-24800000.0-21300000.0-24600000.0-24600000.0
Percentage of NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-03-312018-12-31
Value073043
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification0.0100.00.0100.0

us-gaap:OperatingLeaseCost



Period End2020-03-31
Value50
Percentage of OperatingLeaseCost100.0

us-gaap:OtherAssetImpairmentCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value02270721146
Percentage of OtherAssetImpairmentCharges0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-387100-1292525-64-9-23754-41
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-100000000
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value100000000
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-100000000
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax-100.0-100.0-100.0-100.0-100.0-100.00.0-100.00.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-300000.0-200000.0-200000.0-100000.0-200000.0-100000.0200000.0-100000.00.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-39599-3782525-64-24-23754-44
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312018-12-312017-12-31
Value-8000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax2.2-0.5-0.00.2

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-387100-1292525-64-9-23754-42
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax97.8100.534.1100.0100.0100.037.099.9100.095.5

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-384107-3743028-59-21-23256-40
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-384107-3733029-59-21-23255-40
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value99-245435-11430
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-2.48.465.715.911.6-9.156.7-2.15.7-1.2

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-6-100000
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent1.7-1.7-0.0-0.0-0.00.2-1.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-384107-3733029-59-21-23255-40
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-387100-1292525-64-9-23754-42
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.893.234.584.188.4109.143.3102.196.8104.2

us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:InterestRateContract, us-gaap:Parent



Period End2020-03-312019-12-31
Value00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0

wrk:NaturalGasCommodityHedge, us-gaap:Parent



Period End2020-03-312019-12-31
Value3-1
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax-1233.3157.1

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:CashFlowHedging, us-gaap:Parent



Period End2020-03-312019-12-31
Value3-1
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax-1133.3257.1

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-2100000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.00.00.00.00.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:Parent



Period End2020-03-312019-12-31
Value00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax12.0-38.5

wrk:NaturalGasCommodityHedge, us-gaap:Parent



Period End2020-03-312019-12-31
Value20
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax-108.0-61.5

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:CashFlowHedging, us-gaap:Parent



Period End2020-03-312019-12-31
Value2-1
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax-96.0-100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax

us-gaap:InterestRateContract, us-gaap:Parent



Period End2020-03-312019-12-31
Value-400000.0200000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax100.0100.0

wrk:NaturalGasCommodityHedge, us-gaap:Parent



Period End2020-03-312019-12-31
Value1000000.0300000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax-250.0150.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:CashFlowHedging, us-gaap:Parent



Period End2020-03-312019-12-31
Value1000000.0500000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax-250.0250.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-12-12-6-6-4-737-7-4-4
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11116546-36644
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-8-8-4-4-3-4-3-5-3-3
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value884434-26433
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax-98.8-98.9-97.8-97.8-93.8-100.0825.0-94.2-100.0-97.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value33-101111111
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-964-5-4-3-526-5-3-3
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-3-76-1-1-1-110-2-1-1
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax



Period End2020-03-312018-12-312017-12-31
Value-800
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.00.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1900000.0-13200000.0-18700000.0-15200000.0-28000000.0-18300000.0-38300000.0-31600000.07400000.0-23000000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherRestructuringCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1010204021
Percentage of OtherRestructuringCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic



Period End2020-03-312018-12-312017-12-31
Value100000.00.0200000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic100.00.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted



Period End2020-03-312018-12-312017-12-31
Value100000.00.0200000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted100.00.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0-4900000.0-300000.0-19800000.0-6100000.0-4100000.014400000.0-38100000.0-7600000.0-600000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0-4900000.0-2000000.0-19600000.0-4800000.0-3800000.013700000.0-25700000.0-6000000.0-600000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.0100.0666.799.078.792.795.167.578.9100.0

us-gaap:PaymentsOfDividendsMinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00000261871
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00000261871
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInterestInSubsidiariesAndAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-31
Value00010300110
Percentage of PaymentsToAcquireInterestInSubsidiariesAndAffiliates100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-31
Value00010300110
Percentage of PaymentsToAcquireInterestInSubsidiariesAndAffiliates100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value241374392351303322334238212214
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value241374394351302320337234212214
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.6100.099.799.5101.098.399.8100.0

us-gaap:PensionAndOtherPostretirementBenefitExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-26-26-19-18-18-17-24-21-24-24
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1111116000
Percentage of PensionAndOtherPostretirementBenefitExpense-7.3-7.1-8.8-7.4-9.1-9.8-26.6-0.0-0.8-0.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-28-28-21-20-20-19-31-21-24-24
Percentage of PensionAndOtherPostretirementBenefitExpense107.3107.1108.8107.4109.1109.8126.6100.0100.8100.4

us-gaap:ProceedsFromInsuranceSettlementInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-31
Value01971131
Percentage of ProceedsFromInsuranceSettlementInvestingActivities0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-31
Value01971131
Percentage of ProceedsFromInsuranceSettlementInvestingActivities0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForCatastropheClaimsByCatastrophicEvent, us-gaap:StatementBusinessSegments

us-gaap:Hurricane, wrk:CorrugatedPackaging



Period End2020-03-312019-12-31
Value01
Percentage of ProceedsFromInsuranceSettlementInvestingActivities0.0100.0

us-gaap:ProceedsFromIssuanceOfDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value478101620483151380610377475
Percentage of ProceedsFromIssuanceOfDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value478101619184150510375475
Percentage of ProceedsFromIssuanceOfDebt100.0100.099.838.199.30.1100.0100.099.3100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10-815-109-6130-250
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10-815-1912130-10
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.717.8104.3-198.494.1100.06.2100.0

us-gaap:ProceedsFromRepaymentsOfCommercialPaper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-31
Value-4510-106-142140447-491554
Percentage of ProceedsFromRepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-31
Value-4510-106-142140447-491554
Percentage of ProceedsFromRepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value137103178806312
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-31
Value00
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment0.01.3

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value137103178806312
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.098.7100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-11-7-4-4-3-5-3-5-1-3
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-9-9-5-4-3-5-3-5-3-3
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax79.7116.7104.2100.0100.0100.0100.0100.0183.386.5

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-2100000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax20.3-16.7-0.0-0.0-0.0-0.013.5

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent

us-gaap:Parent



Period End2020-03-312019-12-312019-03-312018-12-31
Value161047
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:Parent



Period End2020-03-312019-12-312019-03-312018-12-31
Value11653-5
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:Parent



Period End2020-03-312019-12-312019-03-312018-12-31
Value47611
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0

us-gaap:RestructuringAndRelatedCostIncurredCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value824546242576214
Percentage of RestructuringAndRelatedCostIncurredCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value171527140040
Percentage of RestructuringAndRelatedCostIncurredCost23.831.228.639.132.154.9-2.911.620.315.9

us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve

us-gaap:CorporateNonSegment, us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1715251400
Percentage of RestructuringAndRelatedCostIncurredCost15.031.228.037.523.055.3-2.913.0

us-gaap:CorporateNonSegment, wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0002000
Percentage of RestructuringAndRelatedCostIncurredCost8.80.51.69.1-0.40.0-1.4

us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value52021512200260
Percentage of RestructuringAndRelatedCostIncurredCost63.883.040.181.252.780.212.936.231.6-4.5

wrk:EquipmentAndInventoryRelocationCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0011100021
Percentage of RestructuringAndRelatedCostIncurredCost11.22.03.528.15.82.78.68.712.743.2

wrk:FacilityCarryingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0010100011
Percentage of RestructuringAndRelatedCostIncurredCost5.02.42.412.54.53.512.913.05.727.3

wrk:NetPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0227-1332231
Percentage of RestructuringAndRelatedCostIncurredCost3.810.950.2-26.615.612.131.431.917.536.4

wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1020502060
Percentage of RestructuringAndRelatedCostIncurredCost16.21.63.84.721.41.634.310.132.5-2.3

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value75212011
Percentage of RestructuringAndRelatedCostIncurredCost92.523.13.718.811.9-0.425.724.6

us-gaap:EmployeeSeverance, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-37414600
Percentage of RestructuringAndRelatedCostIncurredCost-43.828.78.425.016.925.7-4.3-2.9

wrk:EquipmentAndInventoryRelocationCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00000000
Percentage of RestructuringAndRelatedCostIncurredCost0.00.40.23.11.61.28.64.3

wrk:EquipmentAndInventoryRelocationCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00111000
Percentage of RestructuringAndRelatedCostIncurredCost11.21.63.325.04.11.60.04.3

wrk:FacilityCarryingCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00100100
Percentage of RestructuringAndRelatedCostIncurredCost5.02.42.49.43.74.310.011.6

wrk:NetPropertyPlantAndEquipment, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-06-302019-03-312018-09-302018-06-30
Value000001
Percentage of RestructuringAndRelatedCostIncurredCost0.02.03.1-0.88.626.1

wrk:NetPropertyPlantAndEquipment, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0226-14310
Percentage of RestructuringAndRelatedCostIncurredCost3.88.949.3-29.716.512.122.95.8

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00002000
Percentage of RestructuringAndRelatedCostIncurredCost5.00.81.54.711.11.9-11.410.1

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0010000
Percentage of RestructuringAndRelatedCostIncurredCost2.50.81.8-1.61.22.91.4

us-gaap:StatementBusinessSegments

wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value76326034120
Percentage of RestructuringAndRelatedCostIncurredCost97.526.36.232.824.71.948.666.758.5-9.1

wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-11035110111143
Percentage of RestructuringAndRelatedCostIncurredCost-21.242.565.228.142.443.617.120.320.384.1

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0002000
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardGross100.0100.00.0100.00.00.0100.0

us-gaap:SubleaseIncome



Period End2020-03-31
Value1
Percentage of SubleaseIncome100.0

us-gaap:TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect



Period End2020-03-312019-12-31
Value0.0-73400000.0
Percentage of TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect0.0100.0

us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

us-gaap:AccountingStandardsUpdate201802, us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-31
Value0.0-73400000.0
Percentage of TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect0.0100.0

us-gaap:AccountingStandardsUpdate201802, us-gaap:Parent



Period End2020-03-312019-12-31
Value0.0-73400000.0
Percentage of TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect0.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-31
Value0.0-73400000.0
Percentage of TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect0.0100.0

us-gaap:TreasuryStockSharesAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000111100
Percentage of TreasuryStockSharesAcquired0.00.00.00.0100.0100.0100.0100.00.00.0

us-gaap:IncomeTaxAuthorityName

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

wrk:BrazilAdministrativeCouncilOfTaxAppeals



Period End2020-03-312019-12-31
Value3682
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value11124444
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0

wrk:AdditionalAccrualsAndAdjustmentsToAccruals



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value52022414144211-1
Percentage of AdditionalAccrualsAndAdjustmentsToAccruals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:AdditionalReceivableForExpectedRecoveryAndInterest



Period End2020-03-312019-12-31
Value133
Percentage of AdditionalReceivableForExpectedRecoveryAndInterest100.0100.0

wrk:CostOfRealEstateSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value016060113756197
Percentage of CostOfRealEstateSold0.0100.00.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

wrk:DefinedBenefitPlanNetPeriodicBenefitCostCompany

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-12-14-9-9-8-7-14-13-13-13
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Range

wrk:EffectiveTaxRateNetOfTaxComponentsOfOtherComprehensiveIncome

srt:Maximum



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.0100000000000000090.260.0-0.0100000000000000090.270.009999999999999953-0.0099999999999999530.29
Percentage of EffectiveTaxRateNetOfTaxComponentsOfOtherComprehensiveIncome100.0100.00.0100.0100.0100.0100.0100.0

srt:Minimum



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.0100000000000000090.250.00.00.250.010000000000000009-0.0100000000000000090.28
Percentage of EffectiveTaxRateNetOfTaxComponentsOfOtherComprehensiveIncome100.096.20.0-0.092.6100.0100.096.6

us-gaap:ConsolidatedEntities

wrk:EquityInIncomeOfConsolidatedEntities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-511-503-1127-501-526-555-447-441-371-2015
Percentage of EquityInIncomeOfConsolidatedEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value111138331-19168228161159129863
Percentage of EquityInIncomeOfConsolidatedEntities-21.7-27.5-29.43.9-32.1-41.1-36.1-36.1-34.8-42.8

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value148138310252160139
Percentage of EquityInIncomeOfConsolidatedEntities-28.9-27.5-27.6-50.4-30.5-25.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2522264852681961882852812421152
Percentage of EquityInIncomeOfConsolidatedEntities-49.3-45.0-43.0-53.5-37.4-33.8-63.9-63.9-65.2-57.2

wrk:GainOnSaleOfCertainClosedFacilities



Period End2020-03-312019-12-312019-03-312018-12-31
Value50050
Percentage of GainOnSaleOfCertainClosedFacilities100.0100.00.0100.0

us-gaap:StatementEquityComponents

wrk:IncomeLossExcludingPortionAttributableToRedeemableNoncontrollingInterest

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1481383102521601392792682231135
Percentage of IncomeLossExcludingPortionAttributableToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyCapitalInvestmentNonCashInvestingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00-8-1357-91-217230
Percentage of IntercompanyCapitalInvestmentNonCashInvestingActivities0.0100.0100.0100.0100.0100.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0088969158920
Percentage of IntercompanyCapitalInvestmentNonCashInvestingActivities0.0-100.0-100.0-66.1-100.0-27.10.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyCapitalReceiptNonCashFinancingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00-8-1357-91-217230
Percentage of IntercompanyCapitalReceiptNonCashFinancingActivities0.0100.0100.0100.0100.0100.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0089219163490
Percentage of IntercompanyCapitalReceiptNonCashFinancingActivities0.0-100.0-100.0-67.9-100.0-29.20.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyDividendsPaidNonCashFinancingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-12-18-15-11490-5720
Percentage of IntercompanyDividendsPaidNonCashFinancingActivities100.0100.0100.0100.00.0100.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value12181584705720
Percentage of IntercompanyDividendsPaidNonCashFinancingActivities-100.0-100.0-100.0-73.70.0-100.00.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyInterestIncomeExpenseNet

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-30
Value8899
Percentage of IntercompanyInterestIncomeExpenseNet100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-24-25-27-33-27-27-35-19-16-15
Percentage of IntercompanyInterestIncomeExpenseNet-295.1-315.0-301.1-336.40.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19202225272427111010
Percentage of IntercompanyInterestIncomeExpenseNet235.4258.8247.3261.60.00.00.00.00.00.0

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-3-3-4-2037865
Percentage of IntercompanyInterestIncomeExpenseNet-40.2-43.8-46.2-25.30.00.00.00.00.00.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesBorrowingNonCashFinancingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-26-2-2063-8040-163770
Percentage of IntercompanyNotesBorrowingNonCashFinancingActivities100.0100.0100.0100.00.0100.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2620146012119
Percentage of IntercompanyNotesBorrowingNonCashFinancingActivities-100.0-100.0-0.0-18.20.0-74.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesIssuedNonCashInvestingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-26-2-2063-8040-163770
Percentage of IntercompanyNotesIssuedNonCashInvestingActivities100.0100.0100.0100.00.0100.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value262014604519
Percentage of IntercompanyNotesIssuedNonCashInvestingActivities-100.0-100.0-0.0-18.20.0-27.6

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesPayments

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-3-2-730-3809082-85-1
Percentage of IntercompanyNotesPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0323090021
Percentage of IntercompanyNotesPayments-100.0-100.0-104.2-4.1-100.0-0.3-100.00.9-2.5-100.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesPaymentsNonCashFinancingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1-10-2079-5020-132970
Percentage of IntercompanyNotesPaymentsNonCashFinancingActivities100.0100.0100.0100.00.0100.00.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value110170012839
Percentage of IntercompanyNotesPaymentsNonCashFinancingActivities-100.0-100.0-0.8-0.00.0-96.6

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesProceeds

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0-3-2-730-3809082-85-1
Percentage of IntercompanyNotesProceeds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0323000021
Percentage of IntercompanyNotesProceeds-100.0-100.0-100.0-4.1-116.7-0.0-100.00.9-2.5-100.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesProceedsNonCashInvestingActivities

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1-10-2079-5020-132970
Percentage of IntercompanyNotesProceedsNonCashInvestingActivities100.0100.0100.0100.00.0100.00.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value11017004519
Percentage of IntercompanyNotesProceedsNonCashInvestingActivities-100.0-100.0-0.8-0.00.0-34.0

us-gaap:StatementEquityComponents

wrk:IssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-117117-184571312
Percentage of IssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:IssuancesOfCommonStockNetOfRelatedMinimumTaxWithholdings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-21595-91235611
Percentage of IssuancesOfCommonStockNetOfRelatedMinimumTaxWithholdings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-21595-912
Percentage of IssuancesOfCommonStockNetOfRelatedMinimumTaxWithholdings100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

wrk:MultiemployerAndOtherPlansPeriodCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000000000
Percentage of MultiemployerAndOtherPlansPeriodCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:MultiemployerPensionWithdrawalIncomeExpense



Period End2020-03-312019-09-302019-06-302018-06-302017-12-31
Value041-4-180
Percentage of MultiemployerPensionWithdrawalIncomeExpense100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-31
Value0
Percentage of MultiemployerPensionWithdrawalIncomeExpense11.1

srt:NonGuarantorSubsidiaries



Period End2020-03-31
Value0
Percentage of MultiemployerPensionWithdrawalIncomeExpense88.9

us-gaap:ConsolidationItems

wrk:NonAllocatedExpenses

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value171815242419-2132115
Percentage of NonAllocatedExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:PensionFundingMoreLessThanExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value17231717141222242523
Percentage of PensionFundingMoreLessThanExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:ReductionOfCostOfGoodsSold



Period End2020-03-312019-12-31
Value023
Percentage of ReductionOfCostOfGoodsSold100.0100.0

wrk:ReductionOfInterestExpense



Period End2020-03-312019-12-31
Value010
Percentage of ReductionOfInterestExpense100.0100.0

wrk:RestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16306617345440173116
Percentage of RestructuringAndOtherCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1630661734544017311638591881
Percentage of RestructuringAndOtherCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value14286416305437142514
Percentage of RestructuringAndOtherCostsNet87.894.796.491.688.899.893.581.978.988.3

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-31
Value212132320
Percentage of RestructuringAndOtherCostsNet12.25.33.57.811.26.017.57.94.9

wrk:RestructuringAndOtherCostsNetEquipmentAndInventoryRelocationCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0011100021
Percentage of RestructuringAndOtherCostsNetEquipmentAndInventoryRelocationCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsNetFacilityCarryingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0010100011
Percentage of RestructuringAndOtherCostsNetFacilityCarryingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsNetPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0227-1332231
Percentage of RestructuringAndOtherCostsNetPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsNetSeveranceAndOtherEmployeeCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000050100
Percentage of RestructuringAndOtherCostsNetSeveranceAndOtherEmployeeCosts0.0100.0100.0100.0100.0100.0100.0100.00.0100.0

wrk:RestructuringAndOtherCostsOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value851211102833101011
Percentage of RestructuringAndOtherCostsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value851211102833101011
Percentage of RestructuringAndOtherCostsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsReserveAccrualAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-31000-1-1-15-3
Percentage of RestructuringAndOtherCostsReserveAccrualAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsReservePeriodExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value81922515165362
Percentage of RestructuringAndOtherCostsReservePeriodExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsReserveSettledWithCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8182381495698
Percentage of RestructuringAndOtherCostsReserveSettledWithCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

wrk:SegmentReportingInformationSegmentIncome

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value335331584485396324490457373363
Percentage of SegmentReportingInformationSegmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value90461359185761301269494
Percentage of SegmentReportingInformationSegmentIncome27.114.023.118.821.523.726.627.525.325.9

us-gaap:OperatingSegments, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value244283449392310246385321262269
Percentage of SegmentReportingInformationSegmentIncome72.985.677.080.978.476.178.670.370.474.3

us-gaap:OperatingSegments, wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value010100-29160
Percentage of SegmentReportingInformationSegmentIncome0.00.4-0.10.30.10.2-0.62.24.3-0.2

wrk:SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value418425427442444400336380395380
Percentage of SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value27286626141323202424
Percentage of SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization6.76.815.65.93.23.37.15.56.36.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value390396362416429387364359370356
Percentage of SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization93.393.284.694.296.796.7108.494.593.693.6

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00000100
Percentage of SellingGeneralAndAdministrativeExpenseExcludingIntangibleAmortization0.00.0-0.10.10.00.30.00.1

wrk:SellingGeneralAndAdministrativeIntangibleAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1001011021021029273757572
Percentage of SellingGeneralAndAdministrativeIntangibleAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value24262626262626262626
Percentage of SellingGeneralAndAdministrativeIntangibleAmortization24.525.525.425.525.728.135.534.534.735.9

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value75757676766647494946
Percentage of SellingGeneralAndAdministrativeIntangibleAmortization75.574.574.674.574.371.964.565.565.364.1

us-gaap:StatementEquityComponents

wrk:StockIssuedDuringPeriodIssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0000020000
Percentage of StockIssuedDuringPeriodIssuanceOfClassCommonStockNetOfStockReceivedForMinimumTaxWithholdings0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wrk:VariableAndShortTermLeaseCost



Period End2020-03-31
Value27
Percentage of VariableAndShortTermLeaseCost100.0

us-gaap:AccrualForEnvironmentalLossContingencies



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9101010101110
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation

us-gaap:OtherCurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5554444
Percentage of AccrualForEnvironmentalLossContingencies61.150.048.139.338.036.638.0

us-gaap:OtherNoncurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3556676
Percentage of AccrualForEnvironmentalLossContingencies38.950.051.960.762.063.462.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value5853535046474945
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value372526333959173
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value372526333959
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value640156151179154260636452272312298340228
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value46981712195049019324484341
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations73.45.611.77.012.719.377.142.89.015.414.512.2

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-30
Value170147133166134210145259248263260305
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations26.694.488.393.087.380.722.957.291.084.487.589.6

srt:SubsidiaryIssuer



Period End2020-03-312019-06-302019-03-312018-09-302017-12-312016-09-30
Value0000019
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations0.00.00.00.00.25.7

us-gaap:ContractWithCustomerAssetNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value198195188193194188183
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value232271112107
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value10900108001060011000110001080064006800
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value10856102141006310538107951082064156554
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

wrk:InternationalAndOtherDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value137120705832333670
Percentage of DebtLongtermAndShorttermCombinedAmount1.31.20.70.60.30.30.61.1

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:CommercialPaper, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value304350339445588447
Percentage of DebtLongtermAndShorttermCombinedAmount2.83.43.44.25.44.1

wrk:FinanceLeaseObligations, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-30
Value280284185
Percentage of DebtLongtermAndShorttermCombinedAmount2.62.81.8

wrk:NotesDueFiscal2020To2022, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-30
Value505506507
Percentage of DebtLongtermAndShorttermCombinedAmount4.75.05.0

wrk:NotesDueFiscal2023To2028, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value37713770376937683271327825341368
Percentage of DebtLongtermAndShorttermCombinedAmount34.736.937.535.830.330.339.520.9

wrk:NotesDueFiscal2029To2033, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value219121942197220017071710964
Percentage of DebtLongtermAndShorttermCombinedAmount20.221.521.820.915.815.815.0

wrk:NotesDueFiscal2037To2047, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value178178179179179179178178
Percentage of DebtLongtermAndShorttermCombinedAmount1.61.81.81.71.71.72.82.7

wrk:ReceivablesSecuritization, us-gaap:SecuredDebt



Period End2020-03-312019-12-31
Value47550
Percentage of DebtLongtermAndShorttermCombinedAmount4.40.5

wrk:RevolvingCreditAndSwingFacilities, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value807356396405527490355436
Percentage of DebtLongtermAndShorttermCombinedAmount7.43.53.93.84.94.55.56.7

wrk:TermLoanFacilities, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value2096229522952506290529065991622
Percentage of DebtLongtermAndShorttermCombinedAmount19.322.522.823.826.926.99.324.8

us-gaap:DebtInstrument, us-gaap:ShortTermDebtType

wrk:SupplierFinancingAndCommercialCardPrograms, wrk:ShortTermUnsecuredDebt



Period End2020-03-312019-12-312019-09-30
Value108107123
Percentage of DebtLongtermAndShorttermCombinedAmount1.01.01.2

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtWeightedAverageInterestRate

us-gaap:CommercialPaper, us-gaap:UnsecuredDebt



Period End2020-03-312019-09-30
Value0.0220.024
Percentage of DebtWeightedAverageInterestRate100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value274286294246251253261279
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value142143147135135135135
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent52.150.250.254.953.953.452.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value131142146110115118125
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent47.949.849.845.146.146.648.0

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value278257224463447428420368
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value278257224463447428420
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value381375470427380365399416
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value14141410101010
Percentage of EmployeeRelatedLiabilitiesCurrent3.83.93.12.42.72.82.7

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value366360455417370354388
Percentage of EmployeeRelatedLiabilitiesCurrent96.296.096.997.697.397.297.3

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value000000
Percentage of EmployeeRelatedLiabilitiesCurrent0.10.10.00.00.00.1

us-gaap:FIFOInventoryAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value22432309223722242261224719651879
Percentage of FIFOInventoryAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability



Period End2020-03-312019-12-31
Value280284
Percentage of FinanceLeaseLiability100.0100.0

us-gaap:InventoryRawMaterials



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value766825818808844862730614
Percentage of InventoryRawMaterials100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:RevolvingCreditFacility, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-11-212019-11-202019-09-302019-06-302019-03-312018-12-31
Value23002300230020002000200020002000
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LoansAndLeasesReceivableCollateralForSecuredBorrowings

wrk:ReceivablesSecuritizationFacility, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302018-09-30
Value1081879959887
Percentage of LoansAndLeasesReceivableCollateralForSecuredBorrowings100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value104249649950297599373972856745946
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1975197919821986210124632460
Percentage of LongTermDebtAndCapitalLeaseObligations19.020.520.920.422.425.343.4

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value168710609111078104710411035
Percentage of LongTermDebtAndCapitalLeaseObligations16.211.09.611.111.210.718.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6761660966086694622362232179
Percentage of LongTermDebtAndCapitalLeaseObligations64.968.569.568.666.464.038.4

us-gaap:MultiemployerPlansWithdrawalObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value24124023724024023924760
Percentage of MultiemployerPlansWithdrawalObligation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiability



Period End2020-03-312019-12-31
Value739752
Percentage of OperatingLeaseLiability100.0100.0

us-gaap:OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value152164162142141139134153
Percentage of OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value25252527282828
Percentage of OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent16.615.515.919.519.820.220.8

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value127138136114113110106
Percentage of OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent83.484.584.180.580.279.879.2

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value11133344
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1113334
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringAndRelatedCostCostIncurredToDate1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value341333640585578554568
Percentage of RestructuringAndRelatedCostCostIncurredToDate1100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5553157142139131117
Percentage of RestructuringAndRelatedCostCostIncurredToDate116.216.024.624.324.123.720.7

us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve

us-gaap:CorporateNonSegment, us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302018-09-30
Value4746138122100
Percentage of RestructuringAndRelatedCostCostIncurredToDate113.813.821.621.017.7

us-gaap:CorporateNonSegment, wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302018-09-30
Value87181715
Percentage of RestructuringAndRelatedCostCostIncurredToDate12.42.22.83.02.7

us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value150145250230225212197
Percentage of RestructuringAndRelatedCostCostIncurredToDate144.043.639.239.439.038.334.7

wrk:EquipmentAndInventoryRelocationCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value15141816151314
Percentage of RestructuringAndRelatedCostCostIncurredToDate14.54.42.92.92.62.52.5

wrk:FacilityCarryingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value21203433323140
Percentage of RestructuringAndRelatedCostCostIncurredToDate16.36.35.55.75.65.77.0

wrk:NetPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value128128273244246242256
Percentage of RestructuringAndRelatedCostCostIncurredToDate137.638.442.841.842.543.745.1

wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value25246259595460
Percentage of RestructuringAndRelatedCostCostIncurredToDate17.67.49.710.210.29.810.6

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value51443939
Percentage of RestructuringAndRelatedCostCostIncurredToDate115.113.26.26.7

us-gaap:EmployeeSeverance, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value38415954
Percentage of RestructuringAndRelatedCostCostIncurredToDate111.112.59.39.3

wrk:EquipmentAndInventoryRelocationCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value6666
Percentage of RestructuringAndRelatedCostCostIncurredToDate11.81.81.01.1

wrk:EquipmentAndInventoryRelocationCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value981210
Percentage of RestructuringAndRelatedCostCostIncurredToDate12.82.62.01.8

wrk:FacilityCarryingCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value1122
Percentage of RestructuringAndRelatedCostCostIncurredToDate10.60.60.30.4

wrk:FacilityCarryingCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value19193231
Percentage of RestructuringAndRelatedCostCostIncurredToDate15.75.75.15.4

wrk:NetPropertyPlantAndEquipment, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value30304038
Percentage of RestructuringAndRelatedCostCostIncurredToDate18.89.06.36.5

wrk:NetPropertyPlantAndEquipment, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value9696230203
Percentage of RestructuringAndRelatedCostCostIncurredToDate128.328.835.934.7

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value982625
Percentage of RestructuringAndRelatedCostCostIncurredToDate12.72.74.14.4

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value551413
Percentage of RestructuringAndRelatedCostCostIncurredToDate11.61.62.32.3

us-gaap:StatementBusinessSegments

wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9891114111109114116
Percentage of RestructuringAndRelatedCostCostIncurredToDate128.927.317.919.018.920.620.4

wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value169170349313311290316
Percentage of RestructuringAndRelatedCostCostIncurredToDate149.551.254.553.653.852.355.7

wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18181818181818
Percentage of RestructuringAndRelatedCostCostIncurredToDate15.45.62.93.23.23.33.3

us-gaap:RestructuringAndRelatedCostExpectedCost1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value345338649591588559572
Percentage of RestructuringAndRelatedCostExpectedCost1100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5553157142139131117
Percentage of RestructuringAndRelatedCostExpectedCost116.015.824.324.023.723.520.5

us-gaap:ConsolidationItems, us-gaap:RestructuringCostAndReserve

us-gaap:CorporateNonSegment, us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302018-09-30
Value4746138122100
Percentage of RestructuringAndRelatedCostExpectedCost113.713.621.320.817.6

us-gaap:CorporateNonSegment, wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302018-09-30
Value87181715
Percentage of RestructuringAndRelatedCostExpectedCost12.32.22.83.02.7

us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value150145250230226213198
Percentage of RestructuringAndRelatedCostExpectedCost143.643.038.639.038.538.134.7

wrk:EquipmentAndInventoryRelocationCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value16162018171415
Percentage of RestructuringAndRelatedCostExpectedCost14.85.03.23.13.02.62.6

wrk:FacilityCarryingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value22223634343441
Percentage of RestructuringAndRelatedCostExpectedCost16.56.85.55.95.86.27.3

wrk:NetPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value128128273244246242256
Percentage of RestructuringAndRelatedCostExpectedCost137.237.942.141.441.943.344.8

wrk:OtherCostsRelatedToRestructuringAndOtherCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value27256862635460
Percentage of RestructuringAndRelatedCostExpectedCost17.97.410.610.610.99.710.6

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value51443939
Percentage of RestructuringAndRelatedCostExpectedCost114.913.06.16.6

us-gaap:EmployeeSeverance, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value38415954
Percentage of RestructuringAndRelatedCostExpectedCost111.012.39.19.3

wrk:EquipmentAndInventoryRelocationCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value6666
Percentage of RestructuringAndRelatedCostExpectedCost11.91.91.01.0

wrk:EquipmentAndInventoryRelocationCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value10101412
Percentage of RestructuringAndRelatedCostExpectedCost13.03.12.22.1

wrk:FacilityCarryingCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value1222
Percentage of RestructuringAndRelatedCostExpectedCost10.60.70.30.4

wrk:FacilityCarryingCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value20203332
Percentage of RestructuringAndRelatedCostExpectedCost15.96.15.25.5

wrk:NetPropertyPlantAndEquipment, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value30304038
Percentage of RestructuringAndRelatedCostExpectedCost18.78.96.26.4

wrk:NetPropertyPlantAndEquipment, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value9696230203
Percentage of RestructuringAndRelatedCostExpectedCost128.028.435.434.4

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value1092625
Percentage of RestructuringAndRelatedCostExpectedCost13.02.74.14.4

wrk:OtherCostsRelatedToRestructuringAndOtherCosts, wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-30
Value552116
Percentage of RestructuringAndRelatedCostExpectedCost11.71.73.32.8

us-gaap:StatementBusinessSegments

wrk:ConsumerPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value10091114111110115117
Percentage of RestructuringAndRelatedCostExpectedCost129.027.117.718.918.920.620.6

wrk:CorrugatedPackaging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value171174358319319294318
Percentage of RestructuringAndRelatedCostExpectedCost149.651.655.254.054.352.655.7

wrk:LandAndDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18181818181818
Percentage of RestructuringAndRelatedCostExpectedCost15.45.52.93.13.23.33.2

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

wrk:BorrowingsOutstanding

us-gaap:CommercialPaper, us-gaap:UnsecuredDebt



Period End2020-03-312019-09-302018-09-30
Value3043390
Percentage of BorrowingsOutstanding100.0100.00.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

wrk:DebtInstrumentMaximumBorrowingCapacityAmount

wrk:ReceivablesSecuritizationFacility, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302018-09-30
Value678505592571
Percentage of DebtInstrumentMaximumBorrowingCapacityAmount100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesPayable

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-3352-3327-3338-3357-3128-3128-3782
Percentage of IntercompanyNotesPayable100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2390239023902390294129412865
Percentage of IntercompanyNotesPayable-71.3-71.8-71.6-71.2-94.0-94.0-75.8

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value325300311330186187917
Percentage of IntercompanyNotesPayable-9.7-9.0-9.3-9.8-6.0-6.0-24.2

us-gaap:ConsolidatedEntities

wrk:IntercompanyNotesReceivable

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-3352-3327-3338-3357-3128-3128-3782
Percentage of IntercompanyNotesReceivable100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value170145156175313233
Percentage of IntercompanyNotesReceivable-5.1-4.4-4.7-5.2-1.0-1.0-0.9

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3026302630263026294129412865
Percentage of IntercompanyNotesReceivable-90.3-91.0-90.7-90.2-94.0-94.0-75.8

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value155154155155155155884
Percentage of IntercompanyNotesReceivable-4.6-4.7-4.6-4.6-5.0-5.0-23.4

us-gaap:ConsolidatedEntities

wrk:IntercompanyPayables

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2159-1429-1578-1247-662-742-1097
Percentage of IntercompanyPayables100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value15831014105210380357675
Percentage of IntercompanyPayables-73.3-70.9-66.7-83.2-0.1-48.1-61.5

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-03-312018-09-30
Value441021100
Percentage of IntercompanyPayables-2.1-0.7-13.4-0.0-0.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value501394303209157313
Percentage of IntercompanyPayables-23.2-27.6-19.2-16.8-23.7-0.5-1.2

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value291010504381408
Percentage of IntercompanyPayables-1.4-0.7-0.7-76.1-51.4-37.2

us-gaap:ConsolidatedEntities

wrk:IntercompanyReceivables

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2159-1429-1578-1247-662-742-1097
Percentage of IntercompanyReceivables100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-03-312018-12-312018-09-30
Value1023598285
Percentage of IntercompanyReceivables-0.1-0.0-3.5-80.6-26.0

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value177912051340592485104784
Percentage of IntercompanyReceivables-82.4-84.3-84.9-47.5-73.3-14.1-71.4

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3782232386541543927
Percentage of IntercompanyReceivables-17.5-15.6-15.1-52.5-23.2-5.3-2.5

wrk:InventoriesSuppliesAndSpareParts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value494483479485460463368360
Percentage of InventoriesSuppliesAndSpareParts100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

wrk:InvestmentsInConsolidatedSubsidiaries

srt:ConsolidationEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-50848-51407-50474-50458-49811-48910-28003
Percentage of InvestmentsInConsolidatedSubsidiaries100.0100.0100.0100.0100.0100.0100.0

srt:GuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value20161203472003920055199381956314840
Percentage of InvestmentsInConsolidatedSubsidiaries-39.7-39.6-39.7-39.7-40.0-40.0-53.0

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value119831221911973120361179711607
Percentage of InvestmentsInConsolidatedSubsidiaries-23.6-23.8-23.7-23.9-23.7-23.7

srt:SubsidiaryIssuer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18703188401846018366180751773913162
Percentage of InvestmentsInConsolidatedSubsidiaries-36.8-36.6-36.6-36.4-36.3-36.3-47.0

us-gaap:MultiemployerPlanName

wrk:MultiemployerPlansWithdrawalObligationAccumulatedFundingDeficiency

wrk:PaceIndustryUnionManagementPensionFund



Period End2020-02-292019-10-31
Value512
Percentage of MultiemployerPlansWithdrawalObligationAccumulatedFundingDeficiency100.0100.0

wrk:NonRecourseLiabilitiesHeldBySpecialPurposeEntities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value11401143114511471149115111531161
Percentage of NonRecourseLiabilitiesHeldBySpecialPurposeEntities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1140114311451147114911511153
Percentage of NonRecourseLiabilitiesHeldBySpecialPurposeEntities100.0100.0100.0100.0100.0100.0100.0

wrk:RestrictedAssetsHeldBySpecialPurposeEntities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-09-30
Value12701272127412761277127912811287
Percentage of RestrictedAssetsHeldBySpecialPurposeEntities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1270127212741276127712791281
Percentage of RestrictedAssetsHeldBySpecialPurposeEntities100.0100.0100.0100.0100.0100.0100.0

wrk:RestructuringAndOtherCostsReserve



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302015-09-30
Value30343233363631333836474421
Percentage of RestructuringAndOtherCostsReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

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


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems


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


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidatedEntities


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


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


us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities


us-gaap:GrossProfit us-gaap:ConsolidatedEntities


us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities


us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidatedEntities


us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidatedEntities


us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities


us-gaap:ProfitLoss us-gaap:ConsolidatedEntities


us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities


us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities


us-gaap:Assets us-gaap:ConsolidatedEntities


us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities


us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities


us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities


us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities


us-gaap:AccountsReceivableNetCurrent us-gaap:ConsolidatedEntities


us-gaap:InventoryNet us-gaap:ConsolidatedEntities


us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities


us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType


us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities


us-gaap:Goodwill us-gaap:ConsolidatedEntities


us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:ConsolidatedEntities


us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidatedEntities


us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities


us-gaap:DebtCurrent us-gaap:ConsolidatedEntities


us-gaap:AccountsPayableCurrent us-gaap:ConsolidatedEntities


us-gaap:OtherLiabilitiesCurrent us-gaap:ConsolidatedEntities


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


us-gaap:DeferredTaxLiabilitiesNoncurrent us-gaap:ConsolidatedEntities


us-gaap:OtherLiabilitiesNoncurrent us-gaap:ConsolidatedEntities


us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities


us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents


us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities


us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents


us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities


us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities


us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities


us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities


us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities


us-gaap:ProfitLoss us-gaap:ConsolidatedEntities


us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments


us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities


us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities