EAF


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

Table of contents



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

us-gaap:PreferredStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic
us-gaap:Restatement

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:PlanName

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit
us-gaap:Restatement

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense
us-gaap:Restatement

us-gaap:InterestExpenseDebt

us-gaap:NetIncomeLoss
us-gaap:Restatement

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:Restatement

us-gaap:ResearchAndDevelopmentExpense
us-gaap:Restatement

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ContractWithCustomerDuration
us-gaap:ProductOrService
us-gaap:Restatement

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:Restatement

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:InventoryNet

us-gaap:InventoryFinishedGoods

us-gaap:InventoryRawMaterialsAndSupplies

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:Land

us-gaap:MachineryAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:ConstructionInProgressGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:Goodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent
us-gaap:ContractWithCustomerDuration
us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:RetirementPlanSponsorLocation
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

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

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:Restatement

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt
us-gaap:SubsequentEventType

us-gaap:PaymentsOfDividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:Range

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

gti:AccretionExpenseonExtinguishedDebt
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:VariableRate
gti:DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

gti:PaymentOfDividendsRelatedParty
us-gaap:StatementEquityComponents

gti:PaymentOfFinancingCostsAndDebtRestructuringCosts

gti:RepaymentsOfRelatedPartyPayable
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:AccretionExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:SubsequentEventType
us-gaap:ContractWithCustomerDuration
us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueModificationOfContract
us-gaap:ContractWithCustomerDuration
us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateIncreaseDecrease
us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
us-gaap:ContractWithCustomerDuration
us-gaap:DeferredRevenueAdditions
us-gaap:ContractWithCustomerDuration
us-gaap:DeferredRevenueRevenueRecognized1
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:DepreciationAndAmortization
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable
us-gaap:ContractWithCustomerDuration
us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInDueToRelatedParties

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InvestmentIncomeInterest
us-gaap:Restatement

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod
us-gaap:DebtInstrument
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaidInKindInterest

us-gaap:PaymentsOfDebtRestructuringCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyExpense

us-gaap:RelatedPartyTransactionAmountsOfTransaction
us-gaap:Restatement

us-gaap:RepaymentsOfSecuredDebt
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:SubordinatedBorrowingInterestRate
us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:ConsolidatedEntities
us-gaap:SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType

dei:EntityCommonStockSharesOutstanding

gti:AccumulatedOtherComprehensiveIncomeLossUnrealizedGainsOnSecuritiesNetOfTax

gti:CapitalExpensesIncurredButNotYetpaid

gti:CapitalizedMaintenanceCost

gti:DeferredTaxAssetOptionAmortization

gti:DeferredTaxAssetsDeferredExpenseCapitalizedResearchAndDevelopmentCosts

gti:DeferredTaxAssetsEnvironmentalReserves

gti:DeferredTaxLiabilitiesInventory
us-gaap:DerivativeInstrumentRisk
gti:DerivativeNotionalAmount1

gti:ParticipatingSecurities

gti:PensionAndRelatedBenefits

gti:UndistributedEarningsofForeignSubsidiariesSubjectedtoOneTimeTransitionFee

us-gaap:AccountsNotesAndLoansReceivableNetCurrent

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedEmployeeBenefitsCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:BuildingsAndImprovementsGross

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossNoncurrent

us-gaap:ContractWithCustomerAssetGross
us-gaap:ContractWithCustomerDuration
us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:StatementScenario
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenue
us-gaap:ContractWithCustomerDuration

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:RetirementPlanSponsorLocation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:FinancialInstrument
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DueToRelatedPartiesCurrent

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesNoncurrent
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:PlanName
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:RetirementPlanType
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:InventoryWorkInProcess

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LongTermDebtFairValue
us-gaap:Range
us-gaap:LossContingencyEstimateOfPossibleLoss

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:OtherDeferredCostsGross

us-gaap:OtherInventoriesSpareParts

us-gaap:OtherLongTermDebtNoncurrent

us-gaap:OtherPrepaidExpenseCurrent
us-gaap:RetirementPlanSponsorLocation
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PostemploymentBenefitsLiabilityNoncurrent

us-gaap:PrepaidTaxes

us-gaap:ProductWarrantyAccrual
us-gaap:Range
us-gaap:RevenueRemainingPerformanceObligation
us-gaap:SubsequentEventType
us-gaap:SaleOfStockPricePerShare
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShortTermBorrowings

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Stockholders Equity
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
Per Share
Common Stock Dividends Per Share Declared
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Inventories
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Noncurrent
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
InventoryNet
Inventory Finished Goods

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▇▇▇▇▇▇▇████████▁▁▁▁2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.0220.00.00.00.0NANANA1.5321.5351.5281.5251.5251.5211.5191.5181.5151.5161.5091.5061.5041.5031.4991.4971.4941.4931.491NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁▂▅▆▆▆▆███267.880752267.257592267.188547267.188547267.188567267.178663270.485308289.658478290.537612290.537612290.537612290.537612302.225923302.225923302.225923NANANA302.225923NANANANANA152.821011NANANA151.929565NANANA150.869146NANANA149.861081NANANA149.063197NANANA
us-gaap:PreferredStockSharesAuthorized ▄▄▄▄▄▄▄300.0300.0300.0300.0300.0300.0300.0NANANA300.0NANANA300.0100.0100.0100.0100.0NANANA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.010.010.010.010.010.010.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁267.807944267.465319NA267.279555267.260395269.236562NA290.127296290.574153290.566163NA296.145453302.231431302.225923NA302.225923302.225923NANANANANA137.252356136.981193NA136.374914135.963054135.729809NA135.331058135.055833134.832558NA135.000665142.053946144.498767NA146.181145.964404145.822NA121.355121.08842120.957
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁267.560712267.31886NA267.265705267.24958269.21682NA290.112233290.565408290.559025NA296.136564302.225923302.225923NA302.225923302.225923NANANANANA137.252356136.981193NA136.374914135.963054135.729809NA135.134144134.854024134.645729NA134.347199141.398901143.795454NA145.413145.165549145.098NA120.559120.340272120.231
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount █▁1.3586961.106823NA1.730961.734611.297661NA1.3038541.2880030.98133NA0.946610.676185NANANANANANANANANANA1.980607NA1.541048NA1.131088NA1.5291.5911.594615NA0.8629770.8841780.461197NA0.2108970.0026NANA0.2270.227NA
us-gaap:EarningsPerShareBasic ▂▅▅▄▄▅▇▇▇▇█▇▇█▃▁▁0.110.370.47000000000000020.350.350.450.62000000000000010.610.680.680.790.670.670.740.19-0.01-0.06NANANANANA-0.15999999999999998-0.41-0.6200000000000001-0.26-1.14-0.08-0.21000000000000002-0.060.030.030.209999999999999960.220.30.120.40.280.20.190.590.220.340.29
us-gaap:EarningsPerShareDiluted ▂▅▅▄▄▅▇▇▇▇█▇▇█▃▁▁0.110.370.47000000000000020.350.350.450.62000000000000010.610.680.680.790.670.670.740.19-0.01-0.06NANANANANA-0.15999999999999998-0.41-0.6200000000000001-0.26-1.14-0.08-0.21000000000000002-0.060.030.030.209999999999999960.220.290.120.390.280.20.190.580.210.340.29
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Gross Margin us-gaap:Restatement srt:ScenarioPreviouslyReportedNANA338.01286.987280.718318.646414.612420.797480.39474.994532.789454.89456.332451.899192.473137.245116.314104.739NANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:Restatement srt:ScenarioPreviouslyReportedNANA338.01286.987280.718318.646414.612420.797480.39474.994532.789454.89456.332451.899192.473137.245116.314104.739NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▄▅▆▅▅▆▇▇▇▇█▇██▄▃▃▃▃▃▃▃▃▂▂▃▁▃▃▃▃▃▄▄▄▄▄▄▄▄▄52.082136.879155.704135.413133.407164.085217.221225.981267.236263.607302.146259.858273.602290.44544.741.901-3.459-11.427-24.447-19.651-22.614-27.42-12.997-45.833-86.012-23.051-139.488-7.069-25.718-8.56915.97315.74442.32143.56346.57724.00731.30357.49139.56937.64631.286NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense █▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁13.40.71.0650.70.60.30.7460.60.50.20.5510.40.20.00.00.0NANANANANANA1.11.61.5771.32.20.5NANANANANANANANA2.82.21.8NA2.51.51.6NA
us-gaap:ComprehensiveIncomeNetOfTax ▅▆▇▆▆▅▇▆██▇███▅▄▄▃▃▃▁▃▄▂▂▃▁▄▃▄▄▄▄▄▄▄▅▄▅▅48.49197.723144.616104.515107.64465.319191.238136.345195.904219.554189.293201.755214.482222.662.3353.627-8.628-21.504-59.523-20.549-129.335-23.738-15.26-84.374-106.447-58.19-155.194-9.445-28.948-1.924-8.7670.43430.61926.38612.83829.05749.758-2.26437.87541.633NANANANA
us-gaap:CostOfGoodsAndServicesSold ▅▃▃▂▂▂▄▄▄▄▅▄▃▃▂▂▁▁▂▂▂▁▃▄▅▆▇▆█▇▆▅▇▆▆▄▇▆▆▆▅▄▄▃201.867146.396162.485131.862130.6138.917179.322178.497197.047195.524214.359180.28165.91145.149133.854120.42106.423102.357136.905113.602120.26697.014149.183186.448228.915242.814266.231255.097303.551266.44252.44205.177286.489240.73231.234174.007264.276253.088245.072233.202213.318179.013178.936146.37
us-gaap:GrossProfit ▄▅▅▅▄▅▆▆▇▇█▇▇█▃▂▁▁▁▁▁▁▂▂▂▂▂▂▁▂▂▂▃▃▃▃▃▃▃▃▃▃▃▃128.883158.001175.525155.125150.118179.729235.29242.3283.343279.47318.43274.61290.422306.7559.78916.5619.6791.085-1.949-6.91-8.405-12.97515.93920.76330.95617.64417.95325.6944.95136.64448.92148.5584.5179.98684.37766.93183.70892.74475.15972.93567.92176.22375.91869.294
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▆▆▆▆▆▇▇████▇█▄▄▃▃▃▃▃▃▃▃▂▃▁▃▃▃▄▄▄▄▄▄▄▄▄▄▄▄▄35.93115.056138.929112.338112.564146.214182.207196.631234.135229.854242.556225.063184.499250.6942.946-5.19-12.408-21.917-28.574-25.89-27.852-34.105-22.618-55.074-96.316-33.125-148.547-16.804-35.606-16.8466.16.2534.51936.10441.11522.74927.13647.49735.29633.36243.43433.07750.288NA
us-gaap:IncomeTaxExpenseBenefit ▅▆▆▆▆▇▅▆█▇▅▇▂▇▃▄▄▄▄▄▄▄▄▄▃▄▅▄▃▃▄▄▅▅▄▅▁▅▅▅▁▅▅▅7.76516.25713.83318.10419.78823.9467.28520.75537.76732.41812.6724.871-17.26428.643-14.031.9630.9250.3610.123-1.789-5.591-0.2950.1990.534-12.8331.8186.886-5.287-7.385-9.2161.7182.045.886.478-0.7325.22-29.9197.26.7276.099-28.7557.049.54111.813
us-gaap:InterestExpense ▄▅▆▅▅▆▆▇▇▇▇▇▆█▂▂▂▂▂▂▂▂▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁15.99422.16729.04822.47420.8825.67228.85931.80332.96933.734.67433.85528.66737.8657.5837.7927.9027.5467.0546.9646.4366.469.1958.9219.8349.0699.1558.9998.9849.0988.9479.0087.5145.8395.1324.7624.5274.7924.5844.4042.0130.8611.2960.906
us-gaap:InterestExpenseDebt ▁█14.08516.865NA20.89319.324.09227.27930.22231.38932.1233.09332.27822.55412.9195.8776.0976.2175.875.3885.3064.8194.8975.2825.1715.2585.4485.3455.3225.3345.3725.4345.4494.0722.5771.8871.6371.371.7351.3971.2110.5420.0870.162NA
us-gaap:NetIncomeLoss ▄▆▆▆▆▆▇▇▇▇█▇▇█▅▄▄▃▃▃▁▃▃▃▂▃▁▄▃▄▄▄▄▄▅▄▅▅▄▄▅▄▅▄28.16598.799125.09694.23492.776122.268174.922175.876196.368197.436229.632199.466201.448223.67355.628-3.919-17.383-26.344-48.103-22.967-128.399-36.375-22.817-55.608-83.483-34.943-155.433-11.517-28.221-7.634.3824.2128.63929.62641.84717.52957.05540.29728.56927.26373.33126.03740.74734.953
us-gaap:OperatingIncomeLoss ▄▅▆▅▅▆▇▇▇▇█▇██▄▃▃▃▃▃▃▃▃▂▂▃▁▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▄▄52.082136.879155.704135.413133.407164.085217.221225.981267.236263.607302.146259.858273.602290.44544.741.901-3.459-11.427-24.447-19.651-22.614-27.42-12.997-45.833-86.012-23.051-139.488-7.069-25.718-8.56915.97315.74442.32143.56346.57724.00731.30357.49139.56937.64631.28642.47340.79744.626
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▇▄█▇▇▃▇▄▇▅▆▅▃▇▆▇▇▇▄▆▆█▇▁▄▂▆▆▆▇▄▅▆▆▂█8.854-13.43112.6517.4553.63-17.1687.148-13.5973.617-3.539-1.012-3.601-18.8185.041.8877.5468.7554.84-11.42.3-0.8312.5047.515-29.611-12.609-22.579-0.242.387-2.0795.23-9.823-7.3092.0340.712-22.5239.848NANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax █▆█▇▇▁▇▃▆█▂▆▇▆▇▇▇▆▅▆▆▇▇▃▄▄▆▆▆▇▅▆▆▆▃▇20.326-1.07619.5210.28114.868-56.94916.316-39.531-0.46422.118-40.3392.28913.034-1.0736.7067.5468.7554.84-11.422.418-0.93612.6377.557-28.766-22.964-23.2470.2392.072-0.7275.706-13.149-3.7761.98-3.24-29.00911.528NANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▅▅▃▅▅▆▃▅▄▅▄▄▅▄▇▅▄▄▆▅▅▅▅▅▅▄▅▄▄▅▄▅▅▄▅▆▅▃▅▅▆▁█▆-0.3570.354-5.639-0.694-0.3113.314-4.5610.688-0.863-0.467-0.828-1.5020.974-2.0056.4260.643-1.186-3.0672.7380.5671.198-0.237-0.699-0.393-0.543-1.1490.041-0.794-0.9450.772-0.975-0.55-0.371-1.653-0.3943.4230.299-5.3210.196-0.0093.024-10.1118.5963.259
 us-gaap:OtherNonoperatingIncomeExpense us-gaap:Restatement srt:ScenarioPreviouslyReportedNANA-5.639-0.694-0.3113.314-4.5610.688-0.863-0.467-0.828-1.5020.974-2.0051.9760.643-1.186-3.067NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ▂▂▃▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▁▁▁▁▃▃█▄▄▄▂▄▄▄▅▄▄▆▇▄▄▄▅▅▄▃1.0180.9691.9030.650.710.7120.7230.6110.7130.6370.6010.5180.5810.4290.3731.3380.9430.8290.570.5260.7860.6511.9142.4316.32.8712.9032.771.5632.9942.7873.0933.8772.7782.9424.1995.122.8522.9343.073.3693.4353.0912.435
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▄▅▄▄▅▆▆▇▇█▇▇▇▃▂▁▁▁▁▁▁▂▃▄▄▄▄▄▄▄▄▅▅▅▃▅▅▅▄▄▄▄▃330.75304.397338.01286.987280.718318.646414.612420.797480.39474.994532.789454.89456.332451.899192.473137.245116.314104.739115.433111.59115.36595.576165.122207.211259.871260.458284.184280.791308.502303.084301.361253.727370.999320.716315.611240.938347.984345.832320.231306.137281.239255.236254.854215.664
us-gaap:SellingGeneralAndAdministrativeExpense █▂▂▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▂▃▄▃▃▃▂▃▃▃▄▃▄▄▅▃▃▃▃▃▃▂75.78320.15317.91819.06216.00114.93217.34615.70815.39415.22615.68314.23416.23915.87615.38913.32212.19511.68319.08512.21513.42313.79425.25326.2935.15426.9832.13729.90723.54327.62630.16129.71338.31233.64534.85838.72547.28532.40132.65632.21933.26630.31532.0322.233
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▃▃▃▃▃▃▃▅▅▃▃▃▄▃▁▁▁▁▁▂▂▃▅▅▅▆▆▇████████▇▇▇▆▆1397.141378.1211432.7121467.5891533.4361534.2161526.1641825.6691726.3541529.6991505.4911502.7071566.9151467.1781199.1031120.0081149.2731163.6271172.2761238.611272.2731400.541712.9741725.6631833.8051961.4452043.8382209.4912217.8482275.6212296.2182262.1472297.9152276.0982256.6642239.7012168.3662074.7952081.6071996.1891913.183NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▃▃▃▃▃▃▃▅▅▃▃▃▄▃▁▁▁▁▁▂▂▃▅▅▅▆▆▇████████▇▇▇▆▆1397.141378.1211432.7121467.5891533.4361534.2161526.1641825.6691726.3541529.6991505.4911502.7071566.9151467.1781199.1031120.0081149.2731163.6271172.2761238.611272.2731400.541712.9741725.6631833.8051961.4452043.8382209.4912217.8482275.6212296.2182262.1472297.9152276.0982256.6642239.7012168.3662074.7952081.6071996.1891913.183NANANA
us-gaap:StockholdersEquity ▄▃▃▃▂▂▂▂▂▂▁▁▁▃▆▆▆▆▆▆▆▆▇▇▇▇▇██████████████-176.56-233.841-329.385-472.107-574.714-680.379-691.073-606.892-709.838-881.618-1076.769-1038.484-991.019-276.185613.215550.88547.253555.881577.385636.907657.456786.791909.476922.7511004.5261108.3791164.3821313.8121320.7491348.7421347.0611353.7091349.8511317.6511299.4531372.6441339.9441318.4921316.3151275.2281229.726NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▆▄▄▃▂▁▅▄▇▇▅██▇▇-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.67715.85416.318-5.834.53932.2519.21620.289NANANA-7.558NANANANANA-336.524NANANA-292.624NANANA-280.678NANANA-261.937NANANA-309.565NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▂▁▁▁▁▁▂▆▆▆▆▆███773.552759.055758.354757.576756.812756.103765.419818.72820.485819.915819.622819.127851.496851.315851.315NANANA851.315NANANANANA1825.88NANANA1820.451NANANA1812.592NANANA1798.161NANANA1782.859NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁▂▅▆▆▆▆███2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.022NANANA3.022NANANANANA1.528NANANA1.519NANANA1.509NANANA1.499NANANA1.491NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▅▅▄▄▃▃▃▂▂▁▁▁▄█-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411NANANA-269.394NANANANANA-245.751NANANA39.625NANANA66.884NANANA-50.757NANANA-130.134NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▄▄▄▅▅▅▅█▇▅▄▄▅▄▂▁▁▁▁▂▂▂▄▄▄▅▅▆▆▆▆▆▆▆▆▆▅▅▅▄▃604.34583.73629.167657.571712.973706.192682.581000.757881.339671.087638.051630.641694.25631.076354.542296.429325.312328.781330.933371.121397.615408.487589.776600.696644.995681.314742.383795.565775.658805.344831.691796.374823.001820.236810.71786.722731.95682.537676.389613.407545.884NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▃▄▄▄▄▂█▅▂▂▃▄▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▃114.13196.446145.442158.841187.656152.10980.935381.164205.25542.28949.88102.507166.14138.37313.36516.37611.9318.48111.6112.14713.4099.83214.50510.96117.5510.87820.72817.32411.88811.4710.98611.30417.31716.1937.13712.81712.42911.349.29611.24813.09666.50363.37688.532
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▂▃▃▄▃▂█▄▁▁114.13196.446145.442158.841187.656152.10980.935381.164205.25542.28949.88NA166.14138.37313.365NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet ▃▃▃▄▄▄▄▄▄▄▃▃▃▂▁▁▁▁▁▁▂▃▅▅▅▆▆▇▇▇██▇███▆▅▅▅▄257.338250.81265.964299.236312.298322.623313.648314.955314.873299.794293.717261.984251.328202.518174.151164.568164.424159.393156.111166.683187.24282.27375.633364.152382.903418.477450.421491.275490.414519.011540.773538.222513.065545.779554.571555.045444.062408.327402.042374.788340.418NANANA
us-gaap:InventoryFinishedGoods ▁▁▃▅▅▅▄▅▄▃▄▅▄▃▂▁▂▂▂▃▃▅▇▅▆▇▆▆▅▆▆▆▅█▇█▅▄▄39.47642.41254.53577.42780.88176.48871.59877.29269.81163.17968.01575.77968.88859.54848.86543.72744.71547.37749.26359.40462.10575.10195.71878.99984.54497.06385.78583.42678.44687.38188.58384.1973.293105.95292.852104.72473.82167.59763.901NA64.075NANANA
us-gaap:InventoryRawMaterialsAndSupplies ▃▃▃▃▃▄▃▃▃▃▃▂▂▁▁▂▁▁▂▁▂▂▄▄▄▅▆▆▆▇▇██▇▇▇▆▅▆98.69195.987101.09895.136106.696121.191104.8294.47199.24197.95199.93578.08273.34949.39239.43455.49250.47251.03754.46951.16660.0873.557111.519112.416122.218150.34168.232174.255184.42202.161209.593226.232230.057209.038203.432211.652168.982159.387173.166NA118.691NANANA
us-gaap:OtherAssetsCurrent NANA3.381NANANA4.332NANANA4.699NANANA5.73NANANA2.585NANANANANA3.437NANANA2.117NANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▅▄▄▃▃▅▅▆▆▆█▇▄▅▁▂▁▁59.46240.54435.11435.29931.71132.51740.94640.48147.57550.59446.16860.36854.30435.56344.87219.97824.34522.43621.665NANANANANA81.623NANANANANANANANANANANANANANANANANANANA
us-gaap:Land NANA50.285NANANA46.548NANANA45.947NANANA46.599NANANA43.737NANANANANA36.375NANANA37.416NANANA36.744NANANA34.896NANANA33.484NANANA
us-gaap:MachineryAndEquipmentGross NANA621.478NANANA567.715NANANA532.084NANANA495.069NANANA460.892NANANANANA1212.12NANANA1278.655NANANA1172.045NANANA1105.44NANANA1053.197NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross ██▇▇▆▆▆▅▅▄▄▄▄▃▃▂▂▁▁800.973786.124784.902765.822749.575734.118733.417708.267706.135692.186688.842685.352667.664662.004642.651627.582610.939594.394585.704NANANA1477.361453.081500.8211573.9951621.4611596.0061588.881583.4441548.0881537.4881532.3591502.8261469.6251479.9931431.4321388.1081424.7521374.5631328.004NANANA
us-gaap:ConstructionInProgressGross NANA33.098NANANA47.37NANANA42.131NANANA41.375NANANA25.635NANANANANA58.899NANANA76.007NANANA140.732NANANA115.508NANANA73.374NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▆▆▆▅▅▄▄▄▃▃▃▂▂▁▁299.212287.666278.685264.304246.969231.244220.397207.444197.606185.121175.137165.711152.923143.862129.81118.118104.19189.58976.849NANANA842.689819.741846.781908.44938.677797.627767.895737.243711.412705.785698.452689.273672.432680.784654.548652.579684.414661.703635.53NANANA
us-gaap:AmortizationOfIntangibleAssets ▄▄▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇█▇▇▇▇▇████████▃▁▁2.72.72.72.82.92.93.03.03.13.13.13.23.33.33.33.43.53.53.63.53.64.04.44.34.74.75.54.85.15.05.25.25.65.65.65.65.95.75.75.71.90.10.1NA
us-gaap:PropertyPlantAndEquipmentNet ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▄▄▄▄▄▅▇▇████▇▇▇▇▆▆▅▅501.761498.458506.217501.518502.606502.874513.02500.823508.529507.065513.705519.641514.741518.142512.841509.464506.748504.805508.855532.917537.298636.962634.671633.339654.04665.555682.784798.379820.985846.201836.676831.703833.907813.553797.193799.209776.884735.529740.338712.86692.474NANANA
us-gaap:Goodwill ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▆▆▆████████████████171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117171.117173.117384.432384.436420.129495.944496.335496.801496.81497.073497.162497.681498.261498.471498.54499.097498.681498.656500.688499.475499.238NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▁▂▂▂▃▃▃▄▄▅▅▅▆▆▇▇██66.94369.68772.42975.17178.00580.92983.85486.77989.79392.90196.00699.113102.31105.597108.886112.173115.553119.021122.491NANANA75.09875.09875.09894.85794.85794.85794.85799.972106.914112.103117.293122.861128.431134.0139.569142.866148.577NA158.673NANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA7.164NANANA7.9947.2287.5457.37NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▁▁▂▂▂▂▂▃▃▄▃▅▄▄▅▄▄▅▆▆▆█▁▁▂▃▃▃▃▄▄▅▅▅▆▆▇▇▇██87.42792.3793.6696.61697.7197.133104.23104.735116.121121.67110.911135.163126.452127.165129.835123.778126.756138.609141.568143.131147.767164.82386.97992.37397.822105.018110.277108.629114.061119.54124.577130.513136.589137.209142.937147.03152.92152.267158.715164.511168.7NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▅▅▄▂▂▂▄▄▅▅▅▄▅▄▃▂▁▁▁▁▁▁▄▄▅▆██▇▆▇▆▂▂▃▄▄▃▃▂▃89.19282.59470.98949.05650.86252.06778.69773.85692.64285.21988.09780.6288.11279.17869.1158.37647.25344.71847.66341.98245.23347.24672.13679.75686.40998.722122.428118.865115.212103.519111.37994.43758.79756.64363.64971.58874.2864.19365.71252.08369.93NANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ContractWithCustomerDuration us-gaap:ShortTermContractWithCustomerNANA13.056NANANA11.776NANANA5.38NANANA20.784NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▄▄▄▄▅▄▄▆▅▄▇▆▆▃▂▂▁▁▁▁▁▁▇██▃▃▄▄▄▄▄▅▄▅▅▆▅▄▅▄215.429203.52198.093212.132230.187222.543220.206276.192260.093215.09327.127282.682271.387189.38151.959125.773106.246112.016112.407100.656112.056100.4330.414339.101351.901182.897187.628201.695215.875215.299211.098196.664245.384211.395228.039260.014277.253230.416220.969232.461220.643NANANA
us-gaap:LongTermDebtCurrent ▁▁▁▁▁▁▁▃▃▂▅▅▅▃▂▁▁▁▁▁▂▁███0.1290.1270.1310.1478.1410.1380.14170.86143.46215.492106.323106.325106.37852.39416.47413.2828.00710.3568.8526.46516.4829.779199.215191.446188.104NANANA1.161NANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA4.102NANANA4.475NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▅▅▃▄▄▅▃▃▂▂▃▂▂▂▃▂▁▂▁▁▁▂▁▂▂▂▂▃▂▃▃▃█▆▇██▆▆▇▆83.70683.67956.50165.05864.56373.59748.33548.70742.02142.82750.45241.00736.27132.50853.22634.02727.27933.71730.59429.46925.06336.9531.25241.94643.31944.21138.44746.33540.93952.95350.30158.784120.27693.31102.735113.715114.54598.35694.555113.04595.58NANANA
us-gaap:TaxesPayableCurrent ▄▃▅▇█▇▆▅▅▅▇▅▄▂▁▁▁▁▁▁▁▁▂▂▃▃▃▃▃▃▃▃▃▃▃▄▄▃▃▃▃38.4833.19848.7281.75690.45380.62665.17658.91658.11647.782.25551.04337.86522.4519.7378.1317.5395.9095.2565.5775.5624.61220.41217.32124.50626.07323.01926.31730.68727.81428.04728.68230.92335.06228.26638.88944.3327.67225.44331.15930.019NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▄▅▅▆▆▇▇▇▇▇███▅▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▁▁▁▁1225.0261273.1231420.1311564.5781712.6621814.4041812.8232036.3622034.8072033.2082156.6342183.3282210.0061473.659339.374333.712375.963379.602365.432370.597380.457369.817349.335336.321341.615539.509551.533554.512541.593559.643581.723551.886535.709593.453570.758443.187387.624336.122348.73NA275.799NANANA
us-gaap:LongTermDebtNoncurrent ▅▅▅▆▆▇▇▇█████▅▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁1224.8971272.9961420.01564.4311704.5211814.2661812.6821965.5011991.3452017.7162050.3112077.0032103.6281421.265322.9320.43367.956369.246356.58364.132363.975360.038349.335336.321341.615539.509551.533554.512541.593559.643581.723551.886535.709593.453570.758443.187387.624336.122348.73296.254275.799NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▃▁▁▂▆▃█45.22342.98643.42844.25148.14244.78549.773NANANA45.825NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation country:USNANA24.263NANANA27.551NANANA26.71NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation us-gaap:ForeignPlanNANA13.597NANANA9.917NANANA7.008NANANA6.643NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▂▂▂▂▃▃▁▂▁▁▁▁▁▂▁▂▂▂▃▃▄▄▄▅▅▃▄▄▄▇▆▇▇▇▇██▆▆▆▆72.97577.28481.47876.40382.82190.52272.56277.75970.74869.47172.51968.45571.00680.17668.90778.97681.1481.16882.14889.18191.17794.85199.512100.983107.56689.98495.89296.7497.947117.847117.432121.587125.005120.07124.55127.113131.3111.915115.247115.688114.728NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANA3.195NANANA3.598NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA1.377NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA1.024NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA0.872NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA0.449NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▄▃▃▃▂▂▂▂▂▂▁▁▁▃▆▆▆▆▆▆▆▆▇▇▇▇▇██████████████-176.56-233.841-329.385-472.107-574.714-680.379-691.073-606.892-709.838-881.618-1076.769-1038.484-991.019-276.185613.215550.88547.253555.881577.385636.907657.456786.791909.476922.7511004.5261108.3791164.3821313.8121320.7491348.7421347.0611353.7091349.8511317.6511299.4531372.6441339.9441318.4921316.3151275.2281229.726NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▆▄▄▃▂▁▅▄▇▇▅██▇▇-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.67715.85416.318-5.834.53932.2519.21620.289NANANA-7.558NANANANANA-336.524NANANA-292.624NANANA-280.678NANANA-261.937NANANA-309.565NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▂▁▁▁▁▁▂▆▆▆▆▆███773.552759.055758.354757.576756.812756.103765.419818.72820.485819.915819.622819.127851.496851.315851.315NANANA851.315NANANANANA1825.88NANANA1820.451NANANA1812.592NANANA1798.161NANANA1782.859NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁▂▅▆▆▆▆███2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.022NANANA3.022NANANANANA1.528NANANA1.519NANANA1.509NANANA1.499NANANA1.491NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▅▅▄▄▃▃▃▂▂▁▁▁▄█-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411NANANA-269.394NANANANANA-245.751NANANA39.625NANANA66.884NANANA-50.757NANANA-130.134NANANA
us-gaap:CommonStockValue ▇▇▇▇▇▇▇████████▁▁▁▁2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.0220.00.00.00.0NANANA1.5321.5351.5281.5251.5251.5211.5191.5181.5151.5161.5091.5061.5041.5031.4991.4971.4941.4931.491NANANA
us-gaap:AdditionalPaidInCapital ▂▁▁▁▁▁▂▅▆▆▆▅███████773.552759.055758.354757.576756.812756.103765.419818.72820.485819.915819.622819.127851.496851.315851.315854.337854.337854.337854.337NANANA1829.3911827.6721825.881826.9351826.7761822.0821820.4511822.6031818.8331816.1331812.5921810.61806.8451802.9511798.1611796.1931790.7241787.2651782.859NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▅▅▅▄▄▃▃▃▂▂▁▁▁▄█████-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411-317.04-313.121-295.738-269.394NANANA-324.176-301.359-245.751-162.268-127.32528.10839.62567.84675.47671.09466.88438.2458.619-33.228-50.757-107.812-148.109-176.678-130.134NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▄▄▃▂▁▅▄▇▇▅██▇▇▇▆▅▅-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.67715.85416.318-5.834.53932.2519.21620.28913.5836.037-2.718-7.558NANANA-357.733-365.29-336.524-313.56-290.313-290.552-292.624-291.897-297.603-284.454-280.678-282.658-279.418-250.409-261.937-254.64-212.082-221.388-309.565NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▆▅▆▅██▇▆███▅▂▂▂▂▁▂▂▂▂▂▃▂▂▂▃▃▁▂▄▃▁▁▃▃▁▁▄▃▁▂86.33122.425146.981129.009148.373139.283220.544225.749202.206156.817224.359234.569237.122140.5532.99230.1081.6561.817-5.91617.5461.4619.7241.50222.71838.01426.98933.8122.0951.65953.532-6.35317.99987.79445.073-16.093-15.37447.30147.259-16.87-1.09390.89540.092-6.50720.442
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▁▇▇▇-11.81-14.023-5.086-6.32-10.451-13.839-19.929-14.838-14.622-14.495-20.529-18.872-14.605-13.289-10.02718.117-2.661-7.62812.272-7.439-7.041-8.263-12.103-20.683-15.978-21.673-24.158-17.143-24.288-22.751-25.787-10.975-34.063-31.297-26.854-27.748-61.648-35.512-34.505-30.301-276.821-20.778-19.41-4.543
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▅▅▅▅▆▁▆▆▅▄▃▄▇▇▆▆▇▆▆▇▇▇▆▆▆▆▇▆▆▇▆▆▆▇▇▇▆▇▇█▆▇▇-57.85-156.762-156.096-151.858-102.725-53.004-501.135-34.104-24.696-149.696-256.323-278.899-193.222-2.63.922-43.99-5.39312.466-6.794-11.5369.0460.96714.178-7.374-14.91-14.227-6.2580.318-26.577-30.43632.291-12.923-52.492-4.79437.98943.40915.663-8.89549.29729.396132.564-18.941.65422.962
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfFinancingCosts ▃▆█▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▂▂▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂1.3374.0316.0851.0321.0311.0311.0311.0321.0311.0311.0321.0280.7550.6620.0780.0770.0760.0770.0760.0770.0460.00.6520.5431.4230.5210.7620.6330.6320.7290.5880.5550.5150.4270.3930.3770.3630.3860.3850.3870.3840.3750.676NA
us-gaap:DeferredIncomeTaxExpenseBenefit ▆▆▆▆▇▇▅▇█▇▄▆▂█▅▆▆▆▆▆▅▆▅▆▅▆▆▆▄▆▆▆▇▆▆▆▁▆▆▆▃▇▆▅-1.355-2.844.0042.2477.6426.348-11.1937.41314.8566.427-18.8943.827-41.80219.791-12.646-2.056-0.232-0.761-0.324-2.647-8.606-0.485-7.922.973-11.06-3.219-0.502-1.222-19.806-2.841.937-1.666.224-1.8193.943-0.218-49.873-0.7192.0243.515-31.39711.376-0.118-8.121
us-gaap:IncreaseDecreaseInInventories ▃▃▃▃▃▄▃▃▄▃▄▄▅▄▄▃▃▃▅▃▃▃▄▃▃▃▂▃▃▃▄▄▃▃█▁█▃▃▃▄▃▃▃3.825-11.648-34.262-13.295-14.31217.2361.6413.80911.3944.70532.611.1953.88628.67924.237-2.589-3.281-2.71894.947-24.277-12.251-4.8718.704-11.978-31.451-4.126-41.343-0.955-26.305-21.4039.59523.789-28.995-8.543205.526-100.674187.602-22.377-23.359-30.47125.3333.939-21.874-21.039
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▅▅▅▅▅▄▅▅▄▅█▁▄▅▅▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄0.9451.1661.54810.953.0750.8970.3563.2542.835-3.9563.34665.827-64.832-3.7583.5112.355-3.9382.7243.1792.4862.4711.2312.3966.432.1735.5858.2651.7538.1582.0682.1833.2183.8776.5682.436.3928.4810.518-2.143-0.919-0.858-0.117-2.533-1.785
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▅▆▅▆▅██▇▆███▅▂▂▂▂▁▂▂▂▂▂▃▂▂▂▃▃▁▂▄▃▁▁▃▃▁▁▄▃▁▂86.33122.425146.981129.009148.373139.283220.544225.749202.206156.817224.359234.569237.122140.5532.99230.1081.6561.817-5.91617.5461.4619.7241.50222.71838.01426.98933.8122.0951.65953.532-6.35317.99987.79445.073-16.093-15.37447.30147.259-16.87-1.09390.89540.092-6.50720.442
us-gaap:NetIncomeLoss ▄▆▆▆▆▆▇▇▇▇█▇▇█▅▄▄▃▃▃▁▃▃▃▂▃▁▄▃▄▄▄▄▄▅▄▅▅▄▄▅▄▅▄28.16598.799125.09694.23492.776122.268174.922175.876196.368197.436229.632199.466201.448223.67355.628-3.919-17.383-26.344-48.103-22.967-128.399-36.375-22.817-55.608-83.483-34.943-155.433-11.517-28.221-7.634.3824.2128.63929.62641.84717.52957.05540.29728.56927.26373.33126.03740.74734.953
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▁▇▇▇-11.81-14.023-5.086-6.32-10.451-13.839-19.929-14.838-14.622-14.495-20.529-18.872-14.605-13.289-10.02718.117-2.661-7.62812.272-7.439-7.041-8.263-12.103-20.683-15.978-21.673-24.158-17.143-24.288-22.751-25.787-10.975-34.063-31.297-26.854-27.748-61.648-35.512-34.505-30.301-276.821-20.778-19.41-4.543
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▁▁▂▂▃▂▂▂▃▃▂▂▂▂▁▁▁▁▁▁▂▂▂▃▄▃▄▄▄▂▅▅▅▅█▆▆▄▅▃▃▂11.87814.1745.3876.33310.45413.90120.0514.85414.6314.56920.58918.89714.7114.02511.6369.5835.4497.9965.6017.1176.7268.41412.01913.60115.66722.8524.73621.72823.64624.1825.36213.15634.90131.25130.15231.42454.59840.19538.06323.7634.59421.17319.51810.764
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▅▅▅▅▆▁▆▆▅▄▃▄▇▇▆▆▇▆▆▇▇▇▆▆▆▆▇▆▆▇▆▆▆▇▇▇▆▇▇█▆▇▇-57.85-156.762-156.096-151.858-102.725-53.004-501.135-34.104-24.696-149.696-256.323-278.899-193.222-2.63.922-43.99-5.39312.466-6.794-11.5369.0460.96714.178-7.374-14.91-14.227-6.2580.318-26.577-30.43632.291-12.923-52.492-4.79437.98943.40915.663-8.89549.29729.396132.564-18.941.65422.962
us-gaap:RepaymentsOfLongTermDebt NANANA149.186100.0280.0225.140.00.0125.028.24728.1250.00.00.1590.0360.0350.0360.1850.0350.0350.0340.0340.0330.0340.0320.0340.0920.0360.0490.0410.0990.0430.0430.0420.0970.0440.0620.0290.0870.00.00.00.056
 us-gaap:RepaymentsOfLongTermDebt us-gaap:SubsequentEventType us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ▅▅▅▅▅▅▅▅▅▅▁▅▅█▅▅▅▅2.0241.3941.050.9480.6795.9265.1085.1185.1915.194-1260.57324.695179.4941112.00.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.030.0991.3849.4840.00.00.0NANANA0.0NANANANANANANA0.0220.0410.2740.1850.2940.1410.9810.1350.5280.1810.38917.983.9711.18530.2570.0280.0710.5840.2490.0440.01.138
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2679000.02673000.02672000.02672000.02672000.02672000.02705000.02897000.02905000.02905000.02905000.02905000.03022000.03022000.03022000.000001532000.01535000.01528000.01525000.01525000.01521000.01519000.01518000.01515000.01516000.01509000.01506000.01504000.01503000.01499000.01497000.01494000.01493000.01491000.01240000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value267267267267267267270289290290290290302302302302302153152151150149149124122105
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Preferred Stock Shares Authorized

us-gaap:PreferredStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value30030030030030030030030030010010010010010010010010010010010010010010010010010010010.010.010.010.010.010.010.0
Percentage of PreferredStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value267267267267269290290290296302302302302137136136135135135135134135142144146145145121121120
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value267267267267269290290290296302302302302137136136135135135134134134141143145145145120120120
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302015-03-312014-09-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302010-09-302010-06-30
Value1358700.01106800.01731000.01734600.01297700.01303900.01288000.0981330.0946610.0676180.01980600.01541000.01131100.01529000.01591000.01594600.0862980.0884180.0461200.0210900.02600.0227000.0227000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.110.370.470.350.350.450.620.610.680.680.790.670.670.740.19-0.01-0.06-0.16-0.41-0.62-0.26-1.14-0.08-0.21-0.060.030.030.210.220.30.120.40.280.20.190.590.220.340.29
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasic us-gaap:Restatement

srt:ScenarioPreviouslyReported


Earnings
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value470.0350.0350.0450.0610.0610.0680.0680.0790.0670.0670.0740.0
Percentage of EarningsPerShareBasic100000.0100000.0100000.0100000.098387.1100000.0100000.0100000.0100000.0100000.0100000.0100000.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.110.370.470.350.350.450.620.610.680.680.790.670.670.740.19-0.01-0.06-0.16-0.41-0.62-0.26-1.14-0.08-0.21-0.060.030.030.210.220.290.120.390.280.20.190.580.210.340.29
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value130.71.0650.70.60.30.7460.60.50.20.5510.40.20.00.00.00.0121.11.61.5771.32.20.52.82.21.82.51.51.6
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.10.20.30.20.20.10.20.10.10.00.10.10.00.00.00.00.00.00.70.80.60.50.80.20.80.60.60.90.60.6

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

gti:OmnibusEquityIncentivePlan


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value150.80.80.70.40.70.60.30.50.2
Percentage of AllocatedShareBasedCompensationExpense114.2114.3114.3116.7133.3116.7120.0150.0125.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.60.30.30.20.10.20.10.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gti:OmnibusEquityIncentivePlan0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value489714410410765191136195219189201214222623.627-8.628-21.504-59.523-20.549-129.335-23.738-15.26-84.374-106.447-58.19-155.194-9.445-28.948-1.924-8.7670.4343026122949-2.2643741
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.732.142.836.438.320.546.132.440.846.235.544.447.049.332.42.6-7.4-20.5-51.6-18.4-112.1-24.8-9.2-40.7-41.0-22.3-54.6-3.4-9.4-0.6-2.90.28.38.24.112.114.3-0.711.813.6

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20114616213113013817917819719521418016514513312010610213611312097149186228242266255303266252205286240231174264253245233213179178146
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.048.148.145.946.543.643.342.441.041.240.239.636.432.169.587.791.597.7118.6101.8104.2101.590.390.088.193.293.790.898.487.983.880.977.275.173.372.275.973.276.576.275.870.170.267.9

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12815817515515017923524228327931827429030659169.6791.085-1.949-6.91-8.405-12.9751520301717254.951364848847984668392757267767569
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.051.951.954.153.556.456.757.659.058.859.860.463.667.931.112.18.31.0-1.7-6.2-7.3-13.69.710.011.96.86.39.21.612.116.219.122.824.926.727.824.126.823.523.824.229.929.832.1

us-gaap:GrossProfit us-gaap:Restatement

srt:ScenarioPreviouslyReported


Gross
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value17515515017923524228327931827429030660169.6791.085
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0101.4100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.954.153.556.456.757.659.058.859.860.463.667.931.512.18.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported51.954.153.556.456.757.659.058.859.860.463.667.931.512.18.31.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3511513811211214618219623422924222518425042-5.19-12.408-21.917-28.574-25.89-27.852-34.105-22.618-55.074-96.316-33.125-148.547-16.804-35.606-16.8466.16.253436412227473533433350
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.937.841.139.140.145.943.946.748.748.445.549.540.455.522.3-3.8-10.7-20.9-24.8-23.2-24.1-35.7-13.7-26.6-37.1-12.7-52.3-6.0-11.5-5.62.02.59.311.313.09.47.813.711.010.915.413.019.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.76516131819237.2852037321224-17.26428-14.031.9630.9250.3610.123-1.789-5.591-0.2950.1990.534-12.8331.8186.886-5.287-7.385-9.2161.7182.045.886.478-0.7325.22-29.9197.26.7276.099-28.7557.049.54111
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.35.34.16.37.07.51.84.97.96.82.45.5-3.86.3-7.31.40.80.30.1-1.6-4.8-0.30.10.3-4.90.72.4-1.9-2.4-3.00.60.81.62.0-0.22.2-8.62.12.12.0-10.22.83.75.5

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-08-142015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value15222922202528313233343328377.5837.7927.9027.5467.0546.9646.4366.463.7019.0029.1958.9219.8349.0699.1558.9998.9849.0988.9479.0087.5145.8395.1324.7624.5274.7924.5844.4042.0130.8611.2960.906
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.87.38.67.87.48.17.07.66.97.16.57.46.38.43.95.76.87.26.16.25.66.80.00.05.64.33.83.53.23.22.93.03.03.62.01.81.62.01.31.41.41.40.70.30.50.4

us-gaap:InterestExpense us-gaap:Restatement

srt:ScenarioPreviouslyReported


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value292220252831323334332837
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.67.87.48.17.07.66.97.16.57.46.38.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported8.67.87.48.17.07.66.97.16.57.46.38.4

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-08-142015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value141620192427303132333222125.8776.0976.2175.875.3885.3064.8194.8972.9282.525.2825.1715.2585.4485.3455.3225.3345.3725.4345.4494.0722.5771.8871.6371.371.7351.3971.2110.5420.0870.162
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.35.57.36.97.66.67.26.56.86.27.14.92.93.14.45.35.64.74.84.25.10.00.03.22.52.02.11.91.91.71.81.82.11.10.80.60.70.40.50.40.40.20.00.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2898125949212217417519619722919920122355-3.919-17.383-26.344-48.103-22.967-128.399-36.375-22.817-55.608-83.483-34.943-155.433-11.517-28.221-7.634.3824.21282941175740282773264034
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.532.537.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2-41.7-20.6-111.3-38.1-13.8-26.8-32.1-13.4-54.7-4.1-9.1-2.51.51.77.79.213.37.316.411.78.98.926.110.216.016.2

us-gaap:NetIncomeLoss us-gaap:Restatement

srt:ScenarioPreviouslyReported


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value125949212217417519619722919920122355-3.919-17.383-26.344
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported37.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52136155135133164217225267263302259273290441.901-3.459-11.427-24.447-19.651-22.614-27.42-12.997-45.833-86.012-23.051-139.488-7.069-25.718-8.5691515424346243157393731424044
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.745.046.147.247.551.552.453.755.655.556.757.160.064.323.21.4-3.0-10.9-21.2-17.6-19.6-28.7-7.9-22.1-33.1-8.9-49.1-2.5-8.3-2.85.36.211.413.614.810.09.016.612.412.311.116.616.020.7

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value8.854-13.431127.4553.63-17.1687.148-13.5973.617-3.539-1.012-3.601-18.8185.041.8877.5468.7554.84-11.42.3-0.83127.515-29.611-12.609-22.579-0.242.387-2.0795.23-9.823-7.3092.0340.712-22.5239.848
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.7-4.43.72.61.3-5.41.7-3.20.8-0.7-0.2-0.8-4.11.11.05.57.54.6-9.92.1-0.713.14.6-14.3-4.9-8.7-0.10.9-0.71.7-3.3-2.90.50.2-7.14.1

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-31
Value8.854-13.4317.4553.63-17.168-13.5973.617-3.539-3.601-18.8185.045.04
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.7-4.42.61.3-5.4-3.20.8-0.7-0.8-4.11.14.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value20-1.076191014-56.94916-39.531-0.46422-40.3392.28913-1.0736.7067.5468.7554.84-11.422.418-0.936127.557-28.766-22.964-23.2470.2392.072-0.7275.706-13.149-3.7761.98-3.24-29.00911
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.1-0.45.83.65.3-17.93.9-9.4-0.14.7-7.60.52.9-0.23.55.57.54.6-9.92.2-0.813.24.6-13.9-8.8-8.90.10.7-0.21.9-4.4-1.50.5-1.0-9.24.8

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-31
Value20-1.0761014-56.949-39.531-0.464222.28913-1.073-1.073
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-22.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.1-0.43.65.3-17.9-9.4-0.14.70.52.9-0.2-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.3570.354-5.639-0.694-0.3113.314-4.5610.688-0.863-0.467-0.828-1.5020.974-2.0056.4260.643-1.186-3.0672.7380.5671.198-0.237-0.699-0.393-0.543-1.1490.041-0.794-0.9450.772-0.975-0.55-0.371-1.653-0.3943.4230.299-5.3210.196-0.0093.024-10.1118.5963.259
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.1-1.7-0.2-0.11.0-1.10.2-0.2-0.1-0.2-0.30.2-0.43.30.5-1.0-2.92.40.51.0-0.2-0.4-0.2-0.2-0.40.0-0.3-0.30.3-0.3-0.2-0.1-0.5-0.11.40.1-1.50.1-0.01.1-4.03.41.5

us-gaap:OtherNonoperatingIncomeExpense us-gaap:Restatement

srt:ScenarioPreviouslyReported


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-5.639-0.694-0.3113.314-4.5610.688-0.863-0.467-0.828-1.5020.974-2.0051.9760.643-1.186-3.067
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.030.8100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.7-0.2-0.11.0-1.10.2-0.2-0.1-0.2-0.30.2-0.41.00.5-1.0-2.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported-1.7-0.2-0.11.0-1.10.2-0.2-0.1-0.2-0.30.2-0.41.00.5-1.0-2.9

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.0180.9691.9030.650.710.7120.7230.6110.7130.6370.6010.5180.5810.4290.3731.3380.9430.8290.570.5260.7860.6511.9142.4316.32.8712.9032.771.5632.9942.7873.0933.8772.7782.9424.1995.122.8522.9343.073.3693.4353.0912.435
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.60.20.30.20.20.10.10.10.10.10.10.10.21.00.80.80.50.50.70.71.21.22.41.11.01.00.51.00.91.21.00.90.91.71.50.80.91.01.21.31.21.1

us-gaap:ResearchAndDevelopmentExpense us-gaap:Restatement

srt:ScenarioPreviouslyReported


Research
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.9030.650.710.7120.7230.6110.7130.6370.6010.5180.5810.4290.1591.3380.9430.829
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.042.6100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.20.30.20.20.10.10.10.10.10.10.10.11.00.80.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported0.60.20.30.20.20.10.10.10.10.10.10.10.11.00.80.8

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value33030433828628031841442048047453245445645119213711610411511111595165207259260284280308303301253370320315240347345320306281255254215
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerDuration

us-gaap:LongTermContractWithCustomer


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value253245298250245276329334377396364359345272
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax76.780.788.387.187.386.779.579.478.683.468.579.075.760.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax76.780.788.387.187.386.779.579.478.683.468.579.075.760.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:LongTermContractWithCustomer100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermContractWithCustomer


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value654730323030696776471597796167
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.715.59.111.310.79.716.816.115.910.029.817.021.237.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.715.59.111.310.79.716.816.115.910.029.817.021.237.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ShortTermContractWithCustomer100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

gti:ByProduct


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value11114.6735.59711182631181412
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.81.62.03.64.55.56.74.03.12.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.81.62.03.64.55.56.74.03.12.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gti:ByProduct100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Restatement

srt:ScenarioPreviouslyReported


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value338286280318414420480474532454456451192137116104
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7520171916141715151515141615151312111912131325263526322923273029383334384732323233303222
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.96.65.36.65.74.74.23.73.23.22.93.13.63.58.09.710.511.216.510.911.614.415.312.713.510.411.310.77.69.110.011.710.310.511.016.113.69.410.210.511.811.912.610.3

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:Restatement

srt:ScenarioPreviouslyReported


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value17191614171515151514161512131211
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.079.8100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.65.74.74.23.73.23.22.93.13.63.56.49.710.511.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported5.36.65.74.74.23.73.23.22.93.13.63.56.49.710.511.2

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1397137814321467153315341526182517261529150515021566146711991120114911631172123812721400142215101712172518331961204322092217227522962262229722762256223921682074208119961913892
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1397137814321467153315341526182517261529150515021566146711991120114911631172123812721400142215101712172518331961204322092217227522962262229722762256223921682074208119961913892
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-08-142015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-176.56-233.841-329.385-472.107-574.714-680.379-691.073-606.892-709.838-881.618-1076.769-1038.484-991.019-276.185613550547555577636657786810840102090992210041108116413131320134813471353134913171299137213391318131612751229577504138
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-12.6-17.0-23.0-32.2-37.5-44.3-45.3-33.2-41.1-57.6-71.5-69.1-63.2-18.851.149.247.647.849.351.451.756.257.055.70.053.153.554.856.557.059.559.659.358.759.858.757.957.661.361.863.563.263.964.364.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.6771516-5.834321920-7.558-10.257-363.198-336.524-292.624-280.678-261.937-309.565-305.644-355.96-278.316
Percentage of StockholdersEquity0.28.96.08.38.69.51.13.9-2.2-1.90.5-3.3-3.3-7.03.3-1.3-1.3-35.6-33.5-22.2-20.8-19.5-25.2-53.0-70.5-201.1
Percentage of Assets-0.0-1.5-1.4-2.7-3.2-4.2-0.5-1.30.91.1-0.42.32.11.31.7-0.6-0.70.0-18.4-13.2-12.2-12.1-16.2-34.20.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value773759758757756756765818820819819819851851851851851195618251820181217981782130012901025
Percentage of StockholdersEquity-438.1-324.6-230.2-160.5-131.7-111.1-110.8-134.9-115.6-93.0-76.1-78.9-85.9-308.2138.8147.4105.0191.7181.8137.8134.3134.2145.0225.3255.7741.3
Percentage of Assets55.455.152.951.649.449.350.244.847.553.654.454.554.358.071.072.659.90.099.682.178.982.993.2145.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.0223.0223.0221.5321.5281.5191.5091.4991.4911.241.2261.052
Percentage of StockholdersEquity-1.5-1.1-0.8-0.6-0.5-0.4-0.4-0.5-0.4-0.3-0.3-0.3-0.3-1.10.50.50.40.20.20.10.10.10.10.20.20.8
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.00.10.10.10.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411-269.394-33.551-366.4-245.7513966-50.757-130.134-305.202-317.752-518.267
Percentage of StockholdersEquity539.4416.9325.1252.7223.5202.1210.1231.5218.2195.2175.8182.5189.5416.3-42.6-46.7-4.1-35.9-24.53.05.0-3.8-10.6-52.9-63.0-374.5
Percentage of Assets-68.2-70.7-74.7-81.3-83.8-89.6-95.1-76.9-89.7-112.5-125.8-126.1-119.8-78.4-21.8-23.0-2.40.0-13.41.82.9-2.3-6.8-34.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6045836296577127066821000881671638630694631354296325328330371397408426513589600644681742795775805831796823820810786731682676613545428
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.342.443.944.846.546.044.754.851.143.942.442.044.343.029.626.528.328.328.230.031.329.230.034.034.434.835.234.736.336.035.035.436.235.235.836.035.935.133.832.932.530.728.548.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value11496145158187152803812054249102166138131611181112139.8326.927131410171020171111101117167.1371212119.2961113666388501154
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.27.010.210.812.29.95.320.911.92.83.36.810.69.41.11.51.01.61.01.01.10.70.50.90.80.61.00.61.00.80.50.50.50.50.80.70.30.60.60.50.40.60.70.00.00.05.60.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value1149614515818715280381205424916613813
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.27.010.210.812.29.95.320.911.92.83.310.69.41.1

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value257250265299312322313314314299293261251202174164164159156166187282295322375364382418450491490519540538513545554555444408402374340245
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.418.218.620.420.421.020.617.318.219.619.517.416.013.814.514.714.313.713.313.514.720.220.821.321.921.120.921.322.022.222.122.823.623.822.324.024.624.820.519.719.318.817.827.5

Inventory Finished Goods

us-gaap:InventoryFinishedGoods

us-gaap:InventoryFinishedGoods


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value39425477807671776963687568594843444749596275788895788497858378878884731059210473676364
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.13.85.35.35.04.74.24.04.14.55.04.44.14.13.93.94.14.24.84.95.45.55.95.64.64.64.94.23.83.53.83.93.73.24.74.14.73.43.33.13.3

Inventory Raw Materials And Supplies

us-gaap:InventoryRawMaterialsAndSupplies

us-gaap:InventoryRawMaterialsAndSupplies


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9895101951061211049499979978734939555051545160738091111112122150168174184202209226230209203211168159173118
Percentage of InventoryRawMaterialsAndSupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.17.07.16.57.07.96.95.25.76.46.65.24.73.43.35.04.44.44.64.14.75.35.76.16.56.56.77.78.27.98.38.99.110.010.09.29.09.57.87.78.36.2

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3381000.04332000.04699000.05730000.02585000.02290000.03437000.02117000.0
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.30.50.20.20.20.1

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value594035353132404047504660543544192422212181
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.32.92.52.42.12.12.72.22.83.33.14.03.52.43.71.82.11.91.81.54.5

Land

us-gaap:Land

us-gaap:Land


Land
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5046454643543637363433
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.03.13.93.73.82.01.71.61.61.8

Machinery And Equipment Gross

us-gaap:MachineryAndEquipmentGross

us-gaap:MachineryAndEquipmentGross


Machinery
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value62156753249546048612121278117211051053
Percentage of MachineryAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.437.235.341.339.334.266.157.751.051.055.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8007867847657497347337087066926886856676626426276105945856601477145315001573162115961588158315481537153215021469147914311388142413741328982
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.357.054.852.248.947.848.138.840.945.245.845.642.645.153.656.053.251.150.046.586.284.281.880.279.372.271.669.667.468.066.766.065.166.166.066.968.468.969.4110.0

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value334742412544587614011573
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.33.12.83.52.23.13.23.46.15.33.8

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2992872782642462312202071971851751651521431291181048976842819846908938797767737711705698689672680654652684661635610
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.420.919.518.016.115.114.411.411.412.111.611.09.89.810.810.59.17.76.649.247.546.246.345.936.134.632.431.031.230.430.329.830.430.231.532.933.133.268.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.72.72.72.82.92.93.03.03.13.13.13.23.33.33.33.43.53.53.63.53.64.04.44.34.74.75.54.85.15.05.25.25.65.65.65.65.95.75.75.71.90.10.1
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value501498506501502502513500508507513519514518512509506504508532537636637650634633654665682798820846836831833813797799776735740712692371
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.936.235.334.232.832.833.627.429.533.134.134.632.935.342.845.544.143.443.443.042.245.544.843.137.136.735.733.933.436.137.037.236.436.836.335.735.335.735.835.535.635.736.241.7

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:BR


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4.3095.6943.323.5476.18.7879.49226475456
Percentage of PropertyPlantAndEquipmentNet0.91.10.60.71.21.41.53.25.77.08.2
Percentage of Assets0.30.40.20.30.50.60.51.22.12.53.0
Percentage of Assets country:BR0.00.00.00.00.00.00.00.00.00.00.0

country:ES


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value10610210310387937082787677
Percentage of PropertyPlantAndEquipmentNet21.020.020.120.217.214.610.810.09.49.811.2
Percentage of Assets7.46.76.88.77.56.53.93.73.43.54.1
Percentage of Assets country:ES0.00.00.00.00.00.00.00.00.00.00.0

country:FR


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9288918069774961555252
Percentage of PropertyPlantAndEquipmentNet18.317.317.715.613.712.17.67.56.76.77.6
Percentage of Assets6.55.86.06.75.95.42.72.82.42.42.8
Percentage of Assets country:FR0.00.00.00.00.00.00.00.00.00.00.0

country:MX


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1321411461471511588983797571
Percentage of PropertyPlantAndEquipmentNet26.227.628.628.929.724.913.710.29.59.710.3
Percentage of Assets9.39.39.812.312.911.24.93.83.53.53.7
Percentage of Assets country:MX0.00.00.00.00.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value169174169177
Percentage of PropertyPlantAndEquipmentNet33.434.033.034.6
Percentage of Assets11.811.411.214.8
Percentage of Assets country:US0.00.00.00.0

gti:OtherCountries


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.5610.3070.1510.1830.0440.160.6156.9347.2677.6396.502
Percentage of PropertyPlantAndEquipmentNet0.10.10.00.00.00.00.10.80.91.00.9
Percentage of Assets0.00.00.00.00.00.00.00.30.30.40.3
Percentage of Assets gti:OtherCountries0.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1711711711711711711711711711711711711711711711711711711711711711731721703843844204954964964964974974974984984984994984985004994999.037
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.212.411.911.711.211.211.29.49.911.211.411.410.911.714.315.314.914.714.613.813.412.412.111.322.422.322.925.324.322.522.421.821.722.021.721.922.122.323.024.024.125.026.11.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6669727578808386899296991021051081121151191227575759494949499106112117122128134139142148158
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.85.15.15.15.15.35.54.85.26.16.46.66.57.29.110.010.110.210.44.44.44.14.84.64.34.34.44.75.05.15.45.76.06.46.97.18.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

gti:CustomerRelatedIntangible


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value383940414243454647484950515253545657584850535659636669727679838690949599106
Percentage of FiniteLivedIntangibleAssetsNet57.556.856.155.554.954.353.753.152.652.051.551.050.550.049.549.048.548.147.664.267.871.459.762.866.569.769.568.168.067.867.867.767.667.667.066.967.0
Percentage of Assets2.82.92.82.82.82.93.02.52.73.23.33.43.33.64.54.94.94.95.02.83.02.92.92.92.93.03.13.23.43.53.73.94.04.34.64.85.6
Percentage of Assets gti:CustomerRelatedIntangible0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value18202122232426272830313334363839414344151618192123242627293032333536383942
Percentage of FiniteLivedIntangibleAssetsNet28.328.829.329.730.230.731.231.732.232.733.133.634.034.534.935.435.836.236.720.522.524.521.022.624.526.126.326.026.126.326.326.326.426.426.826.826.7
Percentage of Assets1.41.51.51.51.51.61.71.51.72.02.12.22.22.53.23.53.63.73.80.91.01.01.01.01.11.11.21.21.31.31.41.51.61.71.81.92.2
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9.5541010111112121313141415151616171818192.7462.9143.0833.4053.6363.7373.9564.2244.4934.7615.035.3475.6665.9846.3026.6717.0397.776
Percentage of FiniteLivedIntangibleAssetsNet14.314.414.614.714.915.015.115.215.315.315.415.515.515.615.615.615.715.715.73.73.94.13.63.83.94.24.24.24.24.34.44.44.54.54.74.74.9
Percentage of Assets0.70.70.70.80.80.80.80.70.80.91.01.01.01.11.41.61.61.61.60.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.4
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value7164000.07994000.07228000.07545000.07370000.07500000.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.40.40.50.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8792939697971041041161211101351261271291231261381411431471641701628692971051101081141191241301361371421471521521581641687.298
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.36.76.56.66.46.36.85.76.78.07.49.08.18.710.811.111.011.912.111.611.611.812.010.85.15.45.35.45.44.95.15.35.45.85.96.06.36.67.17.37.68.28.80.8

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value898270495052787392858880887969584744474145474961727986981221181151031119458566371746465526933
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.46.05.03.33.33.45.24.05.45.65.95.45.65.45.85.24.13.84.13.43.63.43.54.14.24.64.75.06.05.45.24.54.94.22.62.52.83.23.43.13.22.63.73.8

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ContractWithCustomerDuration

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ShortTermContractWithCustomer


Contract
Period End2020-12-312019-12-312018-12-312017-12-31
Value13115.3820
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0
Percentage of Assets0.90.80.41.7
Percentage of Assets us-gaap:ShortTermContractWithCustomer0.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21520319821223022222027626021532728227118915112510611211210011210096131330339351182187201215215211196245211228260277230220232220180
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.414.813.814.515.014.514.415.115.114.121.718.817.312.912.711.29.29.69.68.18.87.26.88.719.319.719.29.39.29.19.79.59.28.710.79.310.111.612.811.110.611.611.520.2

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value0.1290.1270.1310.1478.1410.1380.1417043151061061065216138.007108.8526.465169.7794.7729.61991911881.161
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.50.00.03.92.51.07.17.16.83.61.41.20.70.90.80.51.30.70.30.611.611.110.30.1

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-31
Value4102000.04475000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.30.3

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value838356656473484842425041363253342733302925362937314143443846405250581209310211311498941139591
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.06.13.94.44.24.83.22.72.42.83.42.72.32.24.43.02.42.92.62.42.02.62.12.51.82.42.42.31.92.11.82.32.22.65.24.14.65.15.34.74.55.75.010.3

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value38334881908065585847825137229.7378.1317.5395.9095.2565.5775.5624.6129.039172017242623263027282830352838442725313038
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.82.43.45.65.95.34.33.23.43.15.53.42.41.50.80.70.70.50.40.50.40.30.61.21.21.01.31.31.11.21.41.21.21.31.31.51.31.72.01.31.21.61.64.4

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12251273142015641712181418122036203420332156218322101473339333375379365370380369367378349336341539551554541559581551535593570443387336348275
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets87.792.499.1106.6111.7118.3118.8111.5117.9132.9143.3145.3141.0100.428.329.832.732.631.229.929.926.425.825.020.419.518.627.527.025.124.424.625.324.423.326.125.319.817.916.216.814.4

us-gaap:LongTermDebt us-gaap:LongtermDebtType

gti:A2018CreditAgreement


Long
Period End2020-09-302019-12-31
Value15631812
Percentage of LongTermDebt100.0100.0
Percentage of Assets106.6118.7
Percentage of Assets gti:A2018CreditAgreement0.00.0

us-gaap:OtherDebtSecurities


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.6750.640.6190.6190.7380.7630.7450.7510.8990.9311.0060.5960.6770.5910.5390.5690.5550.4961.4271.41.6161.3351.3211.6151.6891.8131.841.9181.9141.8911.9032.0262.0242.0372.1282.1822.2542.3922.395
Percentage of LongTermDebt0.00.00.00.00.00.00.00.00.00.00.10.20.20.20.10.20.10.10.40.40.40.40.40.50.30.30.30.40.30.30.30.40.30.40.50.60.70.70.9
Percentage of Assets0.00.00.00.00.00.00.00.00.10.10.10.00.10.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:OtherDebtSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value122412721420156417041814181219651991201720502077210314213223203673693563643633603623683493363415395515545415595815515355935704433873363482962751.467
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets87.792.499.1106.6111.2118.3118.8107.7115.3131.9136.2138.2134.396.926.928.632.031.730.429.428.625.725.524.420.419.518.627.527.025.124.424.625.324.423.326.125.319.817.916.216.814.814.40.2

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4542434448444945
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.13.03.03.12.93.33.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

country:US


Pension
Period End2020-12-312019-12-312018-12-31
Value242726
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0
Percentage of Assets1.71.81.8
Percentage of Assets country:US0.00.00.0

us-gaap:ForeignPlan


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value139.9177.0086.643
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent56.036.026.20.0
Percentage of Assets0.90.60.50.6
Percentage of Assets us-gaap:ForeignPlan0.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7277817682907277706972687180687881818289919495899910010789959697117117121125120124127131111115115114108
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.25.65.75.25.45.94.84.34.14.54.84.64.55.55.77.17.17.07.07.27.26.86.75.95.85.95.94.64.74.44.45.25.15.45.45.35.55.76.15.45.55.86.012.1

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312019-12-31
Value3195000.03598000.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0
Percentage of Assets0.20.2

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value1377000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value1024000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value872000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value449000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value7297000.08073000.07214000.07556000.07361000.07500000.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.40.40.50.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value7846000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value549000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-08-142015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-176.56-233.841-329.385-472.107-574.714-680.379-691.073-606.892-709.838-881.618-1076.769-1038.484-991.019-276.185613550547555577636657786810840102090992210041108116413131320134813471353134913171299137213391318131612751229577504138
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-12.6-17.0-23.0-32.2-37.5-44.3-45.3-33.2-41.1-57.6-71.5-69.1-63.2-18.851.149.247.647.849.351.451.756.257.055.70.053.153.554.856.557.059.559.659.358.759.858.757.957.661.361.863.563.263.964.364.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.6771516-5.834321920-7.558-10.257-363.198-336.524-292.624-280.678-261.937-309.565-305.644-355.96-278.316
Percentage of StockholdersEquity0.28.96.08.38.69.51.13.9-2.2-1.90.5-3.3-3.3-7.03.3-1.3-1.3-35.6-33.5-22.2-20.8-19.5-25.2-53.0-70.5-201.1
Percentage of Assets-0.0-1.5-1.4-2.7-3.2-4.2-0.5-1.30.91.1-0.42.32.11.31.7-0.6-0.70.0-18.4-13.2-12.2-12.1-16.2-34.20.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value773759758757756756765818820819819819851851851851851195618251820181217981782130012901025
Percentage of StockholdersEquity-438.1-324.6-230.2-160.5-131.7-111.1-110.8-134.9-115.6-93.0-76.1-78.9-85.9-308.2138.8147.4105.0191.7181.8137.8134.3134.2145.0225.3255.7741.3
Percentage of Assets55.455.152.951.649.449.350.244.847.553.654.454.554.358.071.072.659.90.099.682.178.982.993.2145.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value2.6792.6732.6722.6722.6722.6722.7052.8972.9052.9052.9052.9053.0223.0223.0223.0223.0221.5321.5281.5191.5091.4991.4911.241.2261.052
Percentage of StockholdersEquity-1.5-1.1-0.8-0.6-0.5-0.4-0.4-0.5-0.4-0.3-0.3-0.3-0.3-1.10.50.50.40.20.20.10.10.10.10.20.20.8
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.00.10.10.10.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-08-142014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411-269.394-33.551-366.4-245.7513966-50.757-130.134-305.202-317.752-518.267
Percentage of StockholdersEquity539.4416.9325.1252.7223.5202.1210.1231.5218.2195.2175.8182.5189.5416.3-42.6-46.7-4.1-35.9-24.53.05.0-3.8-10.6-52.9-63.0-374.5
Percentage of Assets-68.2-70.7-74.7-81.3-83.8-89.6-95.1-76.9-89.7-112.5-125.8-126.1-119.8-78.4-21.8-23.0-2.40.0-13.41.82.9-2.3-6.8-34.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2679000.02673000.02672000.02672000.02672000.02672000.02705000.02897000.02905000.02905000.02905000.02905000.03022000.03022000.03022000.000001532000.01535000.01528000.01525000.01525000.01521000.01519000.01518000.01515000.01516000.01509000.01506000.01504000.01503000.01499000.01497000.01494000.01493000.01491000.01240000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value77375975875775675676581882081981981985185185185485485485418291827182518261826182218201822181818161812181018061802179817961790178717821300
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.455.152.951.649.449.350.244.847.553.654.454.554.358.071.076.374.373.472.9106.8105.999.693.189.482.582.180.179.280.378.979.580.180.582.986.686.089.593.2145.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-952.4-974.852-1070.77-1193.194-1284.756-1374.844-1451.836-1404.832-1549.082-1720.756-1893.496-1895.055-1877.787-1149.738-261.411-317.04-313.121-295.738-269.394-324.176-301.359-245.751-162.268-127.325283967757166388.619-33.228-50.757-107.812-148.109-176.678-130.134-305.202
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-68.2-70.7-74.7-81.3-83.8-89.6-95.1-76.9-89.7-112.5-125.8-126.1-119.8-78.4-21.8-28.3-27.2-25.4-23.0-18.9-17.5-13.4-8.3-6.21.31.83.03.33.12.91.70.4-1.5-2.3-5.2-7.1-8.9-6.8-34.2

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-0.391-20.717-19.641-39.161-49.442-64.31-7.361-23.6771516-5.834321920136.037-2.718-7.558-357.733-365.29-336.524-313.56-290.313-290.552-292.624-291.897-297.603-284.454-280.678-282.658-279.418-250.409-261.937-254.64-212.082-221.388-309.565-305.644
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.0-1.5-1.4-2.7-3.2-4.2-0.5-1.30.91.1-0.42.32.11.31.71.20.5-0.2-0.6-20.9-21.2-18.4-16.0-14.2-13.2-13.2-12.8-13.0-12.6-12.2-12.4-12.4-11.2-12.1-12.3-10.2-11.1-16.2-34.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value861221461291481392202252021562242342371402.992301.6561.817-5.916171.4619.7241.50222382633225153-6.353178745-16.093-15.3744747-16.87-1.0939040-6.50720
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.140.243.545.052.943.753.253.642.133.042.151.652.031.11.621.91.41.7-5.115.71.310.20.911.014.610.411.97.916.717.7-2.17.123.714.1-5.1-6.413.613.7-5.3-0.432.315.7-2.69.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-11.81-14.023-5.086-6.32-10.451-13.839-19.929-14.838-14.622-14.495-20.529-18.872-14.605-13.289-10.02718-2.661-7.62812-7.439-7.041-8.263-12.103-20.683-15.978-21.673-24.158-17.143-24.288-22.751-25.787-10.975-34.063-31.297-26.854-27.748-61.648-35.512-34.505-30.301-276.821-20.778-19.41-4.543
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.6-4.6-1.5-2.2-3.7-4.3-4.8-3.5-3.0-3.1-3.9-4.1-3.2-2.9-5.213.2-2.3-7.310.6-6.7-6.1-8.6-7.3-10.0-6.1-8.3-8.5-6.1-7.9-7.5-8.6-4.3-9.2-9.8-8.5-11.5-17.7-10.3-10.8-9.9-98.4-8.1-7.6-2.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-57.85-156.762-156.096-151.858-102.725-53.004-501.135-34.104-24.696-149.696-256.323-278.899-193.222-2.63.922-43.99-5.39312-6.794-11.5369.0460.96714-7.374-14.91-14.227-6.2580.318-26.577-30.43632-12.923-52.492-4.794374315-8.8954929132-18.941.65422
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.5-51.5-46.2-52.9-36.6-16.6-120.9-8.1-5.1-31.5-48.1-61.3-42.3-0.62.0-32.1-4.611.9-5.9-10.37.81.08.6-3.6-5.7-5.5-2.20.1-8.6-10.010.7-5.1-14.1-1.512.018.04.5-2.615.49.647.1-7.40.610.6

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-08-142015-06-302015-03-312014-12-312014-09-302014-04-232014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1337000.04031000.06085000.01032000.01031000.01031000.01031000.01032000.01031000.01031000.01032000.01028000.0755000.0662000.078000.077000.076000.077000.076000.077000.046000.000922000.0652000.0543000.01423000.0521000.0300000.0762000.0633000.0632000.0729000.0588000.0555000.0515000.0427000.0393000.0377000.0363000.0386000.0385000.0387000.0384000.0375000.0676000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCosts us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCredit, gti:A2018CreditAgreement


Amortization
Period End2021-06-302021-02-28
Value300000.0900000.0
Percentage of AmortizationOfFinancingCosts22.40.0

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

gti:A2018TermLoanFacility, us-gaap:SeniorSubordinatedNotes


Amortization
Period End2021-03-312020-12-31
Value900000.05200000.0
Percentage of AmortizationOfFinancingCosts22.385.5

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.355-2.844.0042.2477.6426.348-11.1937.413146.427-18.8943.827-41.80219-12.646-2.056-0.232-0.761-0.324-2.647-8.606-0.485-7.922.973-11.06-3.219-0.502-1.222-19.806-2.841.937-1.666.224-1.8193.943-0.218-49.873-0.7192.0243.515-31.39711-0.118-8.121
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.825-11.648-34.262-13.295-14.312171.6413.809114.7053211532824-2.589-3.281-2.71894-24.277-12.251-4.8718.704-11.978-31.451-4.126-41.343-0.955-26.305-21.4039.59523-28.995-8.543205-100.674187-22.377-23.359-30.471253.939-21.874-21.039
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.9451.1661.548103.0750.8970.3563.2542.835-3.9563.34665-64.832-3.7583.5112.355-3.9382.7243.1792.4862.4711.2312.3966.432.1735.5858.2651.7538.1582.0682.1833.2183.8776.5682.436.3928.4810.518-2.143-0.919-0.858-0.117-2.533-1.785
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value861221461291481392202252021562242342371402.992301.6561.817-5.916171.4619.7241.50222382633225153-6.353178745-16.093-15.3744747-16.87-1.0939040-6.50720
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.140.243.545.052.943.753.253.642.133.042.151.652.031.11.621.91.41.7-5.115.71.310.20.911.014.610.411.97.916.717.7-2.17.123.714.1-5.1-6.413.613.7-5.3-0.432.315.7-2.69.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2898125949212217417519619722919920122355-3.919-17.383-26.344-48.103-22.967-128.399-36.375-22.817-55.608-83.483-34.943-155.433-11.517-28.221-7.634.3824.21282941175740282773264034
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.532.537.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2-41.7-20.6-111.3-38.1-13.8-26.8-32.1-13.4-54.7-4.1-9.1-2.51.51.77.79.213.37.316.411.78.98.926.110.216.016.2

us-gaap:NetIncomeLoss us-gaap:Restatement

srt:ScenarioPreviouslyReported


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value125949212217417519619722919920122355-3.919-17.383-26.344
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioPreviouslyReported37.032.833.038.442.241.840.941.643.143.844.149.528.9-2.9-14.9-25.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-11.81-14.023-5.086-6.32-10.451-13.839-19.929-14.838-14.622-14.495-20.529-18.872-14.605-13.289-10.02718-2.661-7.62812-7.439-7.041-8.263-12.103-20.683-15.978-21.673-24.158-17.143-24.288-22.751-25.787-10.975-34.063-31.297-26.854-27.748-61.648-35.512-34.505-30.301-276.821-20.778-19.41-4.543
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.6-4.6-1.5-2.2-3.7-4.3-4.8-3.5-3.0-3.1-3.9-4.1-3.2-2.9-5.213.2-2.3-7.310.6-6.7-6.1-8.6-7.3-10.0-6.1-8.3-8.5-6.1-7.9-7.5-8.6-4.3-9.2-9.8-8.5-11.5-17.7-10.3-10.8-9.9-98.4-8.1-7.6-2.1

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11145.3876.33310132014141420181414119.5835.4497.9965.6017.1176.7268.41412131522242123242513343130315440382334211910
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-57.85-156.762-156.096-151.858-102.725-53.004-501.135-34.104-24.696-149.696-256.323-278.899-193.222-2.63.922-43.99-5.39312-6.794-11.5369.0460.96714-7.374-14.91-14.227-6.2580.318-26.577-30.43632-12.923-52.492-4.794374315-8.8954929132-18.941.65422
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.5-51.5-46.2-52.9-36.6-16.6-120.9-8.1-5.1-31.5-48.1-61.3-42.3-0.62.0-32.1-4.611.9-5.9-10.37.81.08.6-3.6-5.7-5.5-2.20.1-8.6-10.010.7-5.1-14.1-1.512.018.04.5-2.615.49.647.1-7.40.610.6

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1491000.02250.00.012528280.00.00.1590.0360.0350.0360.1850.0350.0350.0340.0340.0330.0340.0320.0340.0920.0360.0490.0410.0990.0430.0430.0420.0970.0440.0620.0290.0870.00.00.00.056
Percentage of RepaymentsOfLongTermDebt100.0100.00.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Repayments
Period End2020-10-20
Value60
Percentage of RepaymentsOfLongTermDebt0.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.0241.3941.050.9480.6795.9265.1085.1185.1915.194-1260.5732417911120.00.00.00.0
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:PaymentsOfDividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.651.2770.9480.6795.9265.1185.1915.194
Percentage of PaymentsOfDividends32.191.6100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.00.0301.3849.4840.00.00.00.00.0220.0410.2740.1850.2940.1410.9810.1350.5280.1810.38917831.185300.0280.0710.5840.2490.0440.01.138
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value21.614.116.10.1760.1640.1060.1610.1410.111-0.0940.114-0.378-0.075-0.0160.0690.2010.009-0.009-0.01-0.055-0.0460.3150.5470.2820.3260.179-0.0180.2290.1520.1910.1830.2130.19
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value13.6615.1715.6813.1613.1913.213.1512.8412.111.96
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:Range

srt:Maximum


Share
Period End2020-12-312019-12-312018-12-31
Value20.011.1415.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice146.473.495.7

srt:Minimum


Share
Period End2020-12-312019-12-312018-12-31
Value7.2820.020.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice53.3131.8127.6

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value10251074138135123142
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value638499676.58413311010780
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.1250.1841.992.4923.33.93.717.2039.76916132010
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1213581509520262574
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:AccretionExpenseonExtinguishedDebt

gti:AccretionExpenseonExtinguishedDebt


Accretion
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.5721.2710.5490.5490.5490.00.00.00.00.00.00.0191.6281.6181.6091.599
Percentage of AccretionExpenseonExtinguishedDebt100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0

gti:DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:VariableRate

gti:DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease

us-gaap:LineOfCredit, gti:A2018TermLoanFacility, us-gaap:SubsequentEvent, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-02-12
Value-0.5
Percentage of DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease100.0

gti:DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:LineOfCredit, gti:A2018TermLoanFacility, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-02-17
Value-0.5
Percentage of DebtInstrumentBasisSpreadOnVariableRateIncreaseDecrease0.0

gti:PaymentOfDividendsRelatedParty

gti:PaymentOfDividendsRelatedParty


Payment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.651.2771.6221.7241.993161919191918019
Percentage of PaymentOfDividendsRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:PaymentOfDividendsRelatedParty us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Payment
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.0241.3941.7241.99316191919
Percentage of PaymentOfDividendsRelatedParty311.4109.2100.0100.0100.0100.0100.0100.0

gti:PaymentOfFinancingCostsAndDebtRestructuringCosts

gti:PaymentOfFinancingCostsAndDebtRestructuringCosts


Payment
Period End2021-06-302021-03-31
Value113000.02971000.0
Percentage of PaymentOfFinancingCostsAndDebtRestructuringCosts100.0100.0

gti:RepaymentsOfRelatedPartyPayable

gti:RepaymentsOfRelatedPartyPayable


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0210.00.00.027
Percentage of RepaymentsOfRelatedPartyPayable0.0100.00.00.00.0100.0

us-gaap:AccretionExpense us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:AccretionExpense

us-gaap:LineOfCredit, gti:A2018CreditAgreement


Accretion
Period End2021-06-30
Value400000.0
Percentage of AccretionExpense100.0

us-gaap:AccretionExpense us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gti:A2018TermLoanFacility, us-gaap:SeniorSubordinatedNotes


Accretion
Period End2021-03-312020-12-31
Value1500000.03200000.0
Percentage of AccretionExpense0.00.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value16-48.36-14.201-29.1693572-300.52176162-7.374-52.493-63.20229124
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2600000.05000000.0-600000.02300000.05200000.0500000.0-3800000.0-2300000.01200000.08400000.01600000.02600000.02200000.0600000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-04-232018-06-302018-03-31
Value0.010.010.010.010.0850.0850.0850.0850.0850.850.850.06450.0850.0645
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:RelatedPartyTransactionsByRelatedParty

srt:AffiliatedEntity


Common
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.010.010.010.010.0850.090.090.0850.090.593.68
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0105.9105.9100.010.6694.15705.4

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Common
Period End2021-08-042021-05-032021-02-032020-11-022020-08-052020-05-052020-02-052019-11-062019-07-302019-04-292019-02-072018-11-022018-07-31
Value0.010.010.010.010.010.010.0850.0850.0850.0850.0850.090.09
Percentage of CommonStockDividendsPerShareDeclared0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueModificationOfContract us-gaap:ContractWithCustomerDuration

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueModificationOfContract

us-gaap:LongTermContractWithCustomer


Contract
Period End2021-06-302021-03-31
Value-11233000.0-3550000.0
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueModificationOfContract100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:ContractWithCustomerDuration

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ShortTermContractWithCustomer


Contract
Period End2020-12-312020-09-30
Value2.5861.357
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0

us-gaap:DebtInstrumentInterestRateIncreaseDecrease us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateIncreaseDecrease

us-gaap:LineOfCredit, gti:A2018TermLoanFacility


Debt
Period End2021-02-17
Value-1.0
Percentage of DebtInstrumentInterestRateIncreaseDecrease100.0

us-gaap:DebtInstrumentInterestRateIncreaseDecrease us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument

srt:Minimum, us-gaap:LineOfCredit, gti:A2018TermLoanFacility


Debt
Period End2021-02-17
Value-0.5
Percentage of DebtInstrumentInterestRateIncreaseDecrease50.0

us-gaap:DebtInstrumentInterestRateIncreaseDecrease us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

srt:Minimum, us-gaap:LineOfCredit, gti:A2018TermLoanFacility, us-gaap:SubsequentEvent


Debt
Period End2021-02-12
Value-0.5
Percentage of DebtInstrumentInterestRateIncreaseDecrease0.0

us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed

us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed


Debt
Period End2021-06-302021-03-31
Value030.0
Percentage of DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed0.0100.0

us-gaap:DeferredRevenueAdditions us-gaap:ContractWithCustomerDuration

us-gaap:DeferredRevenueAdditions

us-gaap:ShortTermContractWithCustomer


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.09132-0.4250.8440.5029.189
Percentage of DeferredRevenueAdditions100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueRevenueRecognized1 us-gaap:ContractWithCustomerDuration

us-gaap:DeferredRevenueRevenueRecognized1

us-gaap:LongTermContractWithCustomer


Deferred
Period End2021-06-302021-03-312020-03-312019-09-302019-06-302019-03-312018-03-31
Value3.8580.5460.00.00.00.0272
Percentage of DeferredRevenueRevenueRecognized1100.0100.00.00.00.00.0100.0

us-gaap:ShortTermContractWithCustomer


Deferred
Period End2021-06-302021-03-312020-03-312019-09-302019-06-302019-03-31
Value3.8580.5460.02.9630.2191.424
Percentage of DeferredRevenueRevenueRecognized1100.0100.00.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1283000.01282000.01284000.01339000.01338000.01338000.01502000.01502000.01502000.01389000.01389000.01389000.01307000.01310000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value180000.0174000.0191000.0236000.0239000.0242000.0229000.0251000.0251000.0241000.0241000.0241000.0272000.0272000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1033000.01032000.01033000.01316000.01316000.01316000.01239000.01241000.01241000.01385000.01385000.01385000.01498000.01498000.0
Percentage of DefinedBenefitPlanInterestCost573.9593.1540.8557.6550.6543.8541.0494.4494.4574.7574.7574.7550.7550.7

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0.180.1740.1910.2360.2390.2420.2320.2510.2510.2420.2420.2420.2730.273
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0.3730.3680.3710.5510.5530.5530.2350.2370.2370.4920.4920.4920.6970.696
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost207.2211.5194.2233.5231.4228.5101.394.494.4203.3203.3203.3255.3254.9

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value623000.0618000.0622000.0574000.0575000.0575000.0498000.0498000.0498000.0496000.0496000.0496000.0506000.0508000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1616171614141515151518161516151715172019231918202626263951262420232120162120201913108.61310
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

gti:CommodityForwardDerivatives, us-gaap:DesignatedAsHedgingInstrument, us-gaap:CostOfSales


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value4498000.0549000.01100000.0-1295000.0-1130000.0-2809000.0-1898000.0-3145000.02000000.0-1848000.0421000.00
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

gti:ForeignCurrencyDerivatives, us-gaap:Nondesignated, gti:CostOfGoodSoldOtherExpenseIncome


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value264000.01629000.0-1712000.0-243000.0-217000.0-499000.0142000.0173000.0144000.0-677000.0-363000.0-717000.0
Percentage of DerivativeGainLossOnDerivativeNet5.9296.7-155.618.819.217.8-7.5-5.57.236.60.0-170.3

us-gaap:CommodityContract, us-gaap:Nondesignated, us-gaap:CostOfSales


Derivative
Period End2021-06-302020-06-302020-03-31
Value-242000.0164000.0-139000.0
Percentage of DerivativeGainLossOnDerivativeNet-5.4-14.54.9

us-gaap:CommodityContract, us-gaap:Nondesignated, us-gaap:InterestExpense


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-209000.0-207000.025000.0-139000.000
Percentage of DerivativeGainLossOnDerivativeNet-19.016.0-2.24.90.0-0.0

us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value289000.01330000.01538000.01537000.01521000.0-206000.0-727000.0-323000.0000
Percentage of DerivativeGainLossOnDerivativeNet6.4242.3139.8-118.7-134.67.338.310.30.0-0.00.0

us-gaap:InterestRateSwap, us-gaap:Nondesignated, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-31
Value0866000.0
Percentage of DerivativeGainLossOnDerivativeNet0.0157.7

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1015000.0-636000.0802000.0354000.0350000.0-1266000.0291000.0-898000.078000.0-217000.0-134000.0-431000.0-1528000.0344000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-25.9481614-19.695-17.97-40.743-20.323-44.41333143-14.655-22.09413231-0.8254.662-5.79813-4.4749.038-14.249-33.818-1.041.227-7.535-27.8425.684-6.395-2.89519-47.7673111-104.17767123-7.815-30.037-17.0622.5292.26-36.976-7.593
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value18441227-7.631-45.2455.785-19.5487.517-5.30511-16.73922-1.6942612-1.572-3.92713-5.4739.289-4.586-9.323-2.483-14.777-10.788-6.796.5069.343-17.86.855-36.59621-1.131-67.8521435-12.374105.438-8.29224-13.039-17.79
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.607-18.368-28.452-9.06310149.978-0.51310-38.3333114136.5331.602
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredRevenue us-gaap:ContractWithCustomerDuration

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:ShortTermContractWithCustomer


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-20000.030000.0-54000.0-119000.0-751000.0004000.0
Percentage of IncreaseDecreaseInDeferredRevenue100.0100.0100.0100.0100.00.00.0100.0

us-gaap:IncreaseDecreaseInDueToRelatedParties

us-gaap:IncreaseDecreaseInDueToRelatedParties


Increase
Period End2020-09-302020-03-31
Value213.3
Percentage of IncreaseDecreaseInDueToRelatedParties100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInInterestPayableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-5337000.05727000.0502000.0-18000.0-13000.0-41000.0-47000.0-697000.0-58000.0864000.0-696000.0-6735000.03432000.01886000.0-4814000.04670000.0-4785000.04815000.0-4786000.04811000.0-4812000.04862000.0-4763000.04777000.0-4779000.04783000.0-4828000.04808000.0-4792000.04673000.0-4475000.04870000.01775000.062000.0-360000.0220000.0166000.0-41000.0229000.0-99000.0-273000.0027000.01000.0
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncreaseDecreaseInOperatingCapital


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-25.247-25.187-1.34-51.012-34.2160.13-32.624-22.238317134-14.8938.06115042-22.048.489-8.646-14.625-29.499-7.983-16.523-8.404-21.991-8.269-18.161-37.0816.665-52.383-30.613428.934-22.1410.708174-47.11282-16.797-68.471-54.55137-18.255-47.565-13.347
Percentage of IncreaseDecreaseInOperatingCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value101.512.4090.6951.279-7.4111.774-2.3954.117-7.4250.7120.4562.47-10.75410-1.3220.7510.758-2.594-1.41-0.2932.8731.287-7.525-0.662-3.1134.67-10.84-5.313151.186-0.934-3.2945.2021.3077.4320.98-4.651-1.6791.1350.03-1.751-1.133
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value247230.0146460.01698.013850.010815.019742.05753.015063.08745.07138.0570.08889.05508.00000000000174330.0196910.0201810.0186830.0522390.0653470.0655040.0703310.0426360.0768290.0798860.0723860.073374.0795570.0748150.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value199000.037000.0168000.093000.0348000.01141000.01799000.01765000.0731000.0414000.0589000.0562000.0391000.0115000.075000.058000.0139000.0123000.0189000.0158000.0012000.0273000.073000.073000.0144000.055000.058000.041000.049000.049000.064000.083000.033000.064000.081000.061000.0119000.0115000.0129000.0105000.0160000.0507000.0561000.0
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest us-gaap:Restatement

srt:ScenarioPreviouslyReported


Investment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value168000.093000.0348000.01141000.01799000.01765000.0731000.0414000.0589000.0562000.0391000.0115000.0
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod


Line
Period End2021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value3.504.455-0.0024-0.0036-0.0010.060.00280.00150.01020.0457-0.01420.00010.00240.05740.00240.01060.00780.03440.00230.0008-0.00070.02440.00010-0.00240.0240.0024-0.0001-0.00010.022-0.00020.002300.02
Percentage of LineOfCreditFacilityInterestRateDuringPeriod100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod us-gaap:DebtInstrument

gti:A2018CreditAgreement


Line
Period End2021-06-302021-03-31
Value-1.04.5
Percentage of LineOfCreditFacilityInterestRateDuringPeriod0.0128.6

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:InterestRateSwap


Other
Period End2021-06-302021-03-312020-12-31
Value-0.52.4-4.3
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0001000.0-163000.0-92000.0-33000.03000.0000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax0.00.00.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-31
Value7.158113.85212-37.577-23.456-2.472275.8931-6.113-6.113
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-31
Value7.158113.85212-37.577-23.456-2.472275.8931-6.113-6.113
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1.921-3.144-1.009-3.199106.3060.603-7.295-9.8710.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-4314000.0-695000.01026000.0894000.02204000.02478000.01609000.01456000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-4314000.0-695000.01026000.0894000.02204000.02478000.01609000.01456000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1158000.0-187000.0269000.0236000.0605000.0666000.0393000.0392000.0000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value11126.8692.82611-39.7819.168-25.934-4.08125-39.3275.8931-6.1134.8190.00.00.0-0.020.118-0.1060.1330.0420.845-10.355-0.6680.479-0.3151.3520.476-3.3263.533-0.054-3.952-6.4861.68
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.079-3.332-1.825-0.74-2.96310-2.611-6.9720.966-6.9030.8020.00.00.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00001000.0-163000.061000.0-92000.0-33000.00-288000.00
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax0.00.00.00.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:CommodityContract


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.66.2-6.7-5.1-19.733-13.53.0-6.320-30.268-25.9-1.9
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1005000.0-2349000.0-8191000.0-2495000.0-678000.0838000.0-4142000.0-6531000.0-7890000.0-3268000.0-6109000.0-2773000.0-4305000.0-2574000.014484000.0253000.0-3082000.0-2048000.0-1307000.0-604000.01896000.0750000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaidInKindInterest

us-gaap:PaidInKindInterest


Paid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.895.3091.4241.5871.5871.5941.581.5881.5881.5881.5731.5861.0321.1291.7161.7071.6961.6861.6791.6691.6271.5763.9353.7644.5883.6343.8263.6453.5933.543.4863.4333.2793.1493.0972.9752.9482.9272.8872.8451.20.3910.7030.326
Percentage of PaidInKindInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtRestructuringCosts

us-gaap:PaymentsOfDebtRestructuringCosts


Payments
Period End2021-03-31
Value1600000.0
Percentage of PaymentsOfDebtRestructuringCosts100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value3799000.0275000.00025000.046000.000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.00.00.0100.0100.00.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Payments
Period End2021-03-312020-06-302020-03-31
Value-65000.0-9000.0-21000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation-23.6-36.0-45.7

us-gaap:RetainedEarnings


Payments
Period End2021-03-312020-06-302020-03-31
Value210000.016000.025000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation76.464.054.3

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-989000.0-1120000.0-46000.0-2796000.0-54000.0-60000.093000.00918000.01996000.0-766000.0-793000.0-5647000.05757000.0149000.0-564000.0-127000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-312014-06-302014-03-31
Value68000.0151000.0301000.013000.03000.062000.0121000.016000.08000.074000.060000.025000.0105000.0736000.01173000.0882000.02788000.0368000.0436000.0128000.0153000.0404000.0117000.0521000.0628000.01895000.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualPayments


Product
Period End2021-06-302021-03-312020-12-31
Value296000.0497000.0445000.0
Percentage of ProductWarrantyAccrualPayments100.0100.0100.0

us-gaap:ProductWarrantyExpense

us-gaap:ProductWarrantyExpense


Product
Period End2021-06-302021-03-312020-12-31
Value558000.0164000.0300000.0
Percentage of ProductWarrantyExpense100.0100.0100.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction

us-gaap:RelatedPartyTransactionAmountsOfTransaction


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.00.047-17.7440.00.0-3.3463.3930.00.00.0240.0610.00.00.0
Percentage of RelatedPartyTransactionAmountsOfTransaction0.0100.0100.00.00.0100.0100.00.00.00.0100.00.0100.00.00.00.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:Restatement

srt:ScenarioPreviouslyReported


Related
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-17.744-3.3463.3930.00.00.0240.0610.0
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0100.0100.00.00.00.0100.00.0100.00.0

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSecuredDebt


Repayments
Period End2021-06-302021-03-31
Value50150
Percentage of RepaymentsOfSecuredDebt100.0100.0

us-gaap:RepaymentsOfSecuredDebt us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCredit, gti:A2018CreditAgreement


Repayments
Period End2021-06-302020-12-31
Value50500
Percentage of RepaymentsOfSecuredDebt100.00.0

us-gaap:RepaymentsOfSecuredDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

gti:A2018TermLoanFacility, us-gaap:SeniorSubordinatedNotes


Repayments
Period End2021-02-172021-02-282020-12-31
Value150150500
Percentage of RepaymentsOfSecuredDebt0.00.00.0

us-gaap:RepaymentsOfSecuredDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

gti:A2018TermLoanFacility, us-gaap:SeniorSubordinatedNotes, us-gaap:SubsequentEvent


Repayments
Period End2021-02-12
Value150
Percentage of RepaymentsOfSecuredDebt0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

gti:DeferredandRestrictedStockUnits, gti:OmnibusEquityIncentivePlan


Share
Period End2021-06-302021-03-31
Value0.0111.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

gti:DeferredandRestrictedStockUnits, gti:OmnibusEquityIncentivePlan


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value0.2710.69-2.09012.27
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

gti:DeferredStockUnits


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value13861.011811.020027.012091.012552.016176.06665.0280.09286.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2000.0477500.04000.02000.0298000.0050000.0157000.067000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross14.44042.820.016.52374.10.0750.256071.4721.5

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1500.0514460.016729.02602.0309390.01551.051714.0181900.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross10.84355.883.521.52464.99.6775.964966.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption, gti:OmnibusEquityIncentivePlan


Share
Period End2021-06-302021-03-31
Value011.49
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption, gti:OmnibusEquityIncentivePlan


Sharebased
Period End2021-06-302021-03-31
Value1.5710.39
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue100.0100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:CommonStock


Shares
Period End2021-03-312020-06-302020-03-31
Value-23090.0-3113.0-7465.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value150.7670.7640.7180.4050.7050.570.2930.4750.181
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value150.7660.7640.7180.4050.7050.570.2930.4750.181
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation99.999.9100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-31
Value0.0090.001
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation0.10.1

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value917410.092135.013017.029394.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock


Stock
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-09-302018-08-132018-09-30
Value0.294250.00.00.03.3285740.8791342311
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.00.00.00.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-03-312019-09-302018-09-30
Value0.7579.72.4732
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302020-03-312019-09-302018-09-30
Value0.0030.0330.0080.117
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.40.30.30.4

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-03-312019-09-302018-09-30
Value3.0390.21207.006192
Percentage of StockRepurchasedAndRetiredDuringPeriodValue401.50.0210.0283.6584.7

us-gaap:SubordinatedBorrowingInterestRate

us-gaap:SubordinatedBorrowingInterestRate


Subordinated
Period End2020-12-222015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value4.6250000.070000.070000.070000.07
Percentage of SubordinatedBorrowingInterestRate100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:SubordinatedBorrowingInterestRate us-gaap:LongtermDebtType

us-gaap:SecuredDebt


Subordinated
Period End2020-12-22
Value4.625
Percentage of SubordinatedBorrowingInterestRate100.0

us-gaap:SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions dei:LegalEntity, us-gaap:ConsolidatedEntities

us-gaap:SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions

gti:Brookfield, gti:GrafTechInternationalLtd


Subsidiary
Period End2021-05-262021-06-302021-03-312020-12-312020-07-222020-09-30
Value24.0-12.736.6-9.765.064.25
Percentage of SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions100.0100.0100.0100.0100.0100.0

us-gaap:SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType

gti:Brookfield, gti:GrafTechInternationalLtd, us-gaap:SubsequentEvent


Subsidiary
Period End2021-01-202020-07-22
Value47.80.65
Percentage of SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions0.01.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-07-312021-04-302021-02-162020-10-31
Value267267267267
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

gti:AccumulatedOtherComprehensiveIncomeLossUnrealizedGainsOnSecuritiesNetOfTax

gti:AccumulatedOtherComprehensiveIncomeLossUnrealizedGainsOnSecuritiesNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.911-4.561-16.916-23.785-26.611-37.8491.932-7.2361822-2.878-8.2912.5680.5337.0721.039
Percentage of AccumulatedOtherComprehensiveIncomeLossUnrealizedGainsOnSecuritiesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:CapitalExpensesIncurredButNotYetpaid

gti:CapitalExpensesIncurredButNotYetpaid


Capital
Period End2020-12-312019-12-312018-12-31
Value8.91113
Percentage of CapitalExpensesIncurredButNotYetpaid100.0100.0100.0

gti:CapitalizedMaintenanceCost

gti:CapitalizedMaintenanceCost


Capitalized
Period End2020-12-312018-12-312017-12-31
Value109.80.0
Percentage of CapitalizedMaintenanceCost100.0100.00.0

gti:DeferredTaxAssetOptionAmortization

gti:DeferredTaxAssetOptionAmortization


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-31
Value1031000.01080000.01144000.01204000.02214000.00
Percentage of DeferredTaxAssetOptionAmortization100.0100.0100.0100.0100.00.0

gti:DeferredTaxAssetsDeferredExpenseCapitalizedResearchAndDevelopmentCosts

gti:DeferredTaxAssetsDeferredExpenseCapitalizedResearchAndDevelopmentCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3.8975.5667.6959.41723200.9991.7122.67
Percentage of DeferredTaxAssetsDeferredExpenseCapitalizedResearchAndDevelopmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:DeferredTaxAssetsEnvironmentalReserves

gti:DeferredTaxAssetsEnvironmentalReserves


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1111000.01110000.0976000.0493000.03366000.03503000.04057000.03935000.05021000.0
Percentage of DeferredTaxAssetsEnvironmentalReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:DeferredTaxLiabilitiesInventory

gti:DeferredTaxLiabilitiesInventory


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8.573127.7515.1286.8659.2129.5315.5753.95
Percentage of DeferredTaxLiabilitiesInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:DerivativeNotionalAmount1 us-gaap:DerivativeInstrumentRisk

gti:DerivativeNotionalAmount1

gti:ForeignCurrencyDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value80607163513978
Percentage of DerivativeNotionalAmount1100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommodityContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value38486167768599
Percentage of DerivativeNotionalAmount147.779.886.3105.8148.1215.3126.3

gti:ParticipatingSecurities

gti:ParticipatingSecurities


Participating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value122460.0110650.077157.065062.053204.032981.036546.027796.021413.05592.0
Percentage of ParticipatingSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:PensionAndRelatedBenefits

gti:PensionAndRelatedBenefits


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3737333645556554737560
Percentage of PensionAndRelatedBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gti:UndistributedEarningsofForeignSubsidiariesSubjectedtoOneTimeTransitionFee

gti:UndistributedEarningsofForeignSubsidiariesSubjectedtoOneTimeTransitionFee


Undistributed
Period End2020-12-31
Value1000
Percentage of UndistributedEarningsofForeignSubsidiariesSubjectedtoOneTimeTransitionFee100.0

us-gaap:AccountsNotesAndLoansReceivableNetCurrent

us-gaap:AccountsNotesAndLoansReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value17319518216418119824726431327824820422025211680817480121155162163177205199205206188261230217189253239237203179117
Percentage of AccountsNotesAndLoansReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedEmployeeBenefitsCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7.1287.4166.9774.684117.8428.93210101111
Percentage of AccruedEmployeeBenefitsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedEmployeeBenefitsCurrentAndNoncurrent

us-gaap:AccruedEmployeeBenefitsCurrentAndNoncurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value131117144.8024.5886.1519.337.4617.62420
Percentage of AccruedEmployeeBenefitsCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value564850533029434012011495
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value-7.302-16.156-2.725-15.376-22.831-26.461-9.293-16.441-2.844-6.461-2.922-328.233-295.192-281.211-271.282-239.08
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-08-152015-08-142015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-31
Value8177000.09065000.08243000.08973000.08247000.07385000.05474000.04163000.01036000.01036000.01129000.01097000.0367000.0367000.0365000.0326000.0304000.06459000.006314000.06459000.06582000.07471000.008563000.06718000.06718000.07203000.06860000.06336000.07571000.05227000.04794000.04525000.04153000.03892000.04545000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BuildingsAndImprovementsGross

us-gaap:BuildingsAndImprovementsGross


Buildings
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value807168595576193196182175167
Percentage of BuildingsAndImprovementsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent


Contract
Period End2021-06-302021-03-312020-12-31
Value1800000.01600000.01500000.0
Percentage of ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent100.0100.0100.0

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossNoncurrent

us-gaap:ContractWithCustomerAssetAccumulatedAllowanceForCreditLossNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312019-12-31
Value300000.0800000.01200000.01200000.0
Percentage of ContractWithCustomerAssetAccumulatedAllowanceForCreditLossNoncurrent100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetGross

us-gaap:ContractWithCustomerAssetGross


Contract
Period End2021-06-302021-03-312020-12-312020-09-30
Value2100000.02400000.02700000.0800000.0
Percentage of ContractWithCustomerAssetGross100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:ContractWithCustomerDuration

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:LongTermContractWithCustomer


Contract
Period End2020-12-312019-12-312018-12-312017-12-31
Value5662000.03858000.07716000.00
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.00.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

gti:A2018CreditAgreement


Debt
Period End2021-03-312020-12-312019-12-31
Value7939431843
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0

gti:SeniorSecuredCreditFacility


Debt
Period End2021-06-302020-12-31
Value743943
Percentage of DebtInstrumentCarryingAmount0.0100.0

us-gaap:OtherDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value0.5960.5910.6150.705
Percentage of DebtInstrumentCarryingAmount0.00.10.10.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentInterestRateEffectivePercentage


Debt
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302016-09-302016-06-302015-12-31
Value4.24.25.10.0510.0510.05280.04220.0249
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:StatementScenario

us-gaap:ScenarioPlan


Debt
Period End2021-06-302021-03-312020-12-312019-12-312019-09-30
Value3.953.954.850.04850.0485
Percentage of DebtInstrumentInterestRateEffectivePercentage94.094.095.195.195.1

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

gti:UnamortizedFinancingCostsMember


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value19212431
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible


Decrease
Period End2020-12-31
Value100000.0
Percentage of DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible100.0

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value8.96.9108.9
Percentage of DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value32323240495655
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value73787478
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0

us-gaap:DeferredRevenue

us-gaap:DeferredRevenue


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value13115.3820
Percentage of DeferredRevenue100.0100.0100.0100.0

us-gaap:DeferredRevenue us-gaap:ContractWithCustomerDuration

us-gaap:LongTermContractWithCustomer


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1.2585.1165.6623.8583.8583.8583.8587.4967.7527.6997.7167.6140.0
Percentage of DeferredRevenue0.00.043.40.00.00.032.80.00.00.0143.40.00.0

us-gaap:ShortTermContractWithCustomer


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value344213171820112.9224.6514.2575.386.97320
Percentage of DeferredRevenue0.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-31
Value15
Percentage of DeferredTaxAssetsDeferredIncome100.0

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsDerivativeInstruments


Deferred
Period End2020-12-312019-12-31
Value3552000.0768000.0
Percentage of DeferredTaxAssetsDerivativeInstruments100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7698158218179153136132155
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsInventory


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7.38114147.933191613115.146
Percentage of DeferredTaxAssetsInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign


Deferred
Period End2020-12-31
Value9100000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3646000.01872000.04270000.01536000.06288000.05889000.09052000.07148000.07899000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-31
Value3755111
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign


Deferred
Period End2020-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value171111756446545785
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value181818194341514846
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-31
Value0.0960.2320.3510.5021717
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7.5526.9963.6680.01.04610111332
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3254000.02468000.03138000.02031000.03761000.02204000.02340000.0730000.01424000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value54565968591091029087
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value176162147158157158237213230218189
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

country:US


Defined
Period End2020-12-312019-12-312018-12-31
Value-24.686-27.978-27.14
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-13.634-9.923-6.978-6.789
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet55.235.525.70.0

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us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value13000.037000.0147000.00
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.00.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.780.02590.03710.0320.03610.0386
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.460.0150.01740.01570.01570.0184
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanBenefitObligation

country:US


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value140135126139
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3828222018
Percentage of DefinedBenefitPlanBenefitObligation27.621.317.614.60.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:PostemploymentRetirementBenefits


Defined
Period End2020-12-312019-12-31
Value1718
Percentage of DefinedBenefitPlanBenefitObligation12.313.3

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

country:US


Defined
Period End2020-12-312019-12-31
Value4243
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value139.1688.223
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter31.321.30.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

country:US


Defined
Period End2020-12-312019-12-31
Value9254000.09271000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value1102000.0884000.0858000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths11.99.50.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

country:US


Defined
Period End2020-12-312019-12-31
Value8976000.09012000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value1330000.02340000.0955000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive14.826.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

country:US


Defined
Period End2020-12-312019-12-31
Value9022000.09145000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value2763000.01038000.0824000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour30.611.40.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

country:US


Defined
Period End2020-12-312019-12-31
Value9149000.09195000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value1229000.0905000.0824000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree13.49.80.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

country:US


Defined
Period End2020-12-312019-12-31
Value9211000.09240000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value1087000.0870000.0755000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo11.89.40.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear

country:US


Defined
Period End2020-12-312019-12-31
Value2363000.04419000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value886000.0737000.0744000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear37.516.70.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets


Defined
Period End2020-12-312019-12-312018-12-312017-12-312014-12-312013-12-312012-12-31
Value140126115123777271
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

country:US


Defined
Period End2020-12-312019-12-312018-12-31
Value-24686000.0-27978000.0-27140000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-13634000.0-9923000.0-6978000.0-6789000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan55.235.525.70.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation

country:US


Defined
Period End2020-12-312019-12-312018-12-31
Value140135126
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value37272120
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation26.920.616.90.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

country:US


Defined
Period End2020-12-312019-12-312018-12-31
Value140135126
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value35262018
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation25.219.816.20.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets

country:US


Defined
Period End2020-12-312019-12-312018-12-31
Value11510799
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets100.0100.0100.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value24171413
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets20.916.714.40.0

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

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:DefinedBenefitPlanEquitySecurities, country:US


Defined
Period End2020-12-312019-12-31
Value20.00.2
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0

us-gaap:FixedIncomeSecurities, country:US


Defined
Period End2020-12-312019-12-31
Value80.00.8
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations400.0400.0

us-gaap:FixedIncomeSecurities, us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value100.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations500.0500.00.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:RetirementPlanSponsorLocation

country:US


Defined
Period End2020-12-312019-12-31
Value100.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations500.0500.0

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value100.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations500.0500.00.0

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

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherNoncurrentAssets, us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.5710.0630.00.00.3690.0499.428110.2623131.8622.808
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncurrentAssets, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-30
Value2.7753.2910.00.02.6840.022
Percentage of DerivativeFairValueOfDerivativeAsset0.0576.40.00.0727.444.9

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value125.5920.5180.0010.00.00.1040.0064.8129.0350.0918152.4362.518
Percentage of DerivativeFairValueOfDerivativeAsset0.0979.3822.20.00.00.028.212.251.078.734.675.3119.5130.889.7

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

us-gaap:OtherNoncurrentAssets, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-31
Value0.0630.3690.26
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets, gti:ForeignCurrencyDerivatives, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-06-302015-03-312014-12-31
Value0.1370.1460.0060.8170.1660.090.2390.1890.3690.0670.00.030.0230.110.0090.010.0760.1810.0170.08
Percentage of DerivativeFairValueOfDerivativeAsset0.025.69.50.00.00.064.8385.73.90.60.00.10.25.90.30.00.00.00.00.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-31
Value0.5180.1040.09
Percentage of DerivativeFairValueOfDerivativeAsset822.228.234.6

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2020-09-302020-06-302020-03-312019-12-31
Value0.1650.2940.00.376
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.0101.9

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

us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value159.4540.5810.0010.00.03.411.1114200.3541284.2985.326
Percentage of DerivativeFairValueOfDerivativeAsset0.01655.7922.20.00.00.0924.12265.3151.0178.7134.6175.3219.5230.8189.7

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.5813.410.355.326
Percentage of DerivativeFairValueOfDerivativeAsset922.2924.1134.6189.7

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312015-06-302015-03-312014-12-31
Value0.1370.1460.0060.9820.460.090.6150.080.080.017
Percentage of DerivativeFairValueOfDerivativeAsset0.025.69.50.00.00.0166.70.00.00.0

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

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.8884.6536.733181.8729.290.00.0014.630.00.00.2850.0
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.0

us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.8440.8484.085.735.9145.8690.00.0
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0459.5123.187.832.60.00.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.8984.2617.312152.2557.940.0430.06.3930.00.0585.8880.581
Percentage of DerivativeFairValueOfDerivativeLiability213.791.6108.687.4120.585.50.00.0138.10.00.02066.00.0

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value6.9037.6098.2157.9220.0720.317
Percentage of DerivativeFairValueOfDerivativeLiability777.4163.5122.044.03.83.4

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

gti:OtherAccruedLiabilities, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-31
Value0.8881.8724.63
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0

gti:OtherAccruedLiabilities, us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-31
Value4.080.0
Percentage of DerivativeFairValueOfDerivativeLiability459.50.0

us-gaap:OtherCurrentLiabilities, gti:ForeignCurrencyDerivatives, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-06-302015-03-312014-12-31
Value0.2720.4290.1110.1610.190.1350.0810.9710.0880.080.0430.0090.0340.0710.090.1880.0110.4740.3250.428
Percentage of DerivativeFairValueOfDerivativeLiability0.00.012.53.52.80.74.310.50.08000.00.90.00.024.90.00.00.00.00.00.0

us-gaap:OtherCurrentLiabilities, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2020-12-312020-06-302020-03-312019-12-31
Value0.9520.00.450.0
Percentage of DerivativeFairValueOfDerivativeLiability107.20.02.50.0

us-gaap:OtherCurrentLiabilities, us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
Period End2020-12-31
Value0.952
Percentage of DerivativeFairValueOfDerivativeLiability107.2

us-gaap:OtherNoncurrentLiabilities, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-31
Value1.8982.2556.393
Percentage of DerivativeFairValueOfDerivativeLiability213.7120.5138.1

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


Derivative
Period End2020-12-312019-12-31
Value6.9030.072
Percentage of DerivativeFairValueOfDerivativeLiability777.43.8

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument

us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:SeparatedHostFinancialInstrumentFairValueOption


Derivative
Period End2021-06-302021-03-31
Value2.83.1
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:SeparatedHostFinancialInstrumentFairValueOption


Derivative
Period End2021-06-302021-03-31
Value5.76.4
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0

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

us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.8440.848132228474.199170.0430.001110.00.0586.1730.581
Percentage of DerivativeFairValueOfDerivativeLiability0.00.01550.6478.3418.4264.0224.3188.90.0100.0238.10.00.02166.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:FinancialInstrument

us-gaap:SeparatedHostFinancialInstrumentFairValueOption


Derivative
Period End2021-06-302021-03-31
Value8.59.5
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-312017-12-31
Value134.199110.581
Percentage of DerivativeFairValueOfDerivativeLiability1550.6224.3238.10.0

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312015-06-302015-03-312014-12-31
Value0.2720.4291.0630.1610.190.5850.0810.4280.4280.325
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0119.73.52.83.24.30.00.00.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

gti:ForeignCurrencyDerivatives


Derivative
Period End2020-12-312019-12-31
Value7178
Percentage of DerivativeNotionalAmount100.0100.0

us-gaap:CommodityContract


Derivative
Period End2020-12-312019-12-31
Value6199
Percentage of DerivativeNotionalAmount86.3126.3

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

us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
Period End2020-12-31
Value250
Percentage of DerivativeNotionalAmount352.1

us-gaap:DueToRelatedPartiesCurrent

us-gaap:DueToRelatedPartiesCurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3.9223.92221161616272323230.0
Percentage of DueToRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1919405858588986
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToRelatedPartiesNoncurrent

us-gaap:DueToRelatedPartiesNoncurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value151519424242626262628661610.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of DueToRelatedPartiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

gti:ShareBasedPaymentArrangementAwardWithAcceleratedVestingProvision, gti:OmnibusEquityIncentivePlan


Employee
Period End2021-06-302021-03-31
Value1415
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0

gti:ShareBasedPaymentArrangementAwardWithAcceleratedVestingProvisionScenario1, gti:OmnibusEquityIncentivePlan


Employee
Period End2021-06-302021-03-31
Value1314
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized93.993.4

gti:ShareBasedPaymentArrangementAwardWithAcceleratedVestingProvisionScenario2, gti:OmnibusEquityIncentivePlan


Employee
Period End2021-06-302021-03-31
Value0.91.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized6.16.6

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:PlanName

gti:OmnibusEquityIncentivePlan


Employee
Period End2021-06-302021-03-312020-09-30
Value0.8168.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized5.4106.60.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

gti:DeferredandRestrictedStockUnits


Employee
Period End2020-12-312019-12-312018-12-31
Value7900000.07600000.05400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:RetirementPlanType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FairValueInputsLevel3, gti:FixedInsuranceContracts, us-gaap:PensionPlansDefinedBenefit


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2417141211
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7572696764615855524946433936333026231986868667-67.19-67.1967-62.075-58.653-53.46448-42.706-37.136312520143.047
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

gti:CustomerRelatedIntangible


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2624232221201918171615131211109.5278.4127.2956.1776259575451474441373431-27.545-23.8572016128.811.258
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization34.534.334.133.933.733.533.333.132.932.732.632.332.232.031.831.631.531.331.271.968.965.880.7-76.2-71.066.5-66.6-64.7-64.764.764.564.263.963.462.460.941.3

us-gaap:TechnologyEquipment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value363534323130292726242322201817151312102726242321201817151412-11.047-9.548.0336.5265.0153.5080.497
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization48.348.548.849.149.349.649.850.150.350.550.851.051.351.551.751.952.252.352.532.130.428.734.9-32.7-29.927.7-27.5-26.5-26.326.025.925.725.425.124.924.316.3

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1212111110109.8619.3368.8048.2627.7217.1796.6296.0715.5124.9544.3863.8113.2355.1544.9864.8174.4954.2644.1633.9443.6763.4073.1392.87-2.553-2.2341.9161.5981.2290.8610.124
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.217.117.117.017.016.916.916.816.816.716.716.616.616.516.516.416.416.416.35.95.75.56.7-6.3-6.25.9-5.9-5.8-5.95.96.06.06.16.16.16.04.1

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value10101010
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value5300000.08000000.02700000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value7300000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value7300000.07300000.08000000.08000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value8000000.08000000.09200000.09200000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value9.29.21010
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value142142142142142142142142142142142142142142142142142142142162162162162162162162162165165165165165165165163163161
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

gti:CustomerRelatedIntangible


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value64646464646464646464646464646464646464110110110110110110110110110110110110110110110108108107
Percentage of FiniteLivedIntangibleAssetsGross45.345.345.345.345.345.345.345.345.345.345.345.345.345.345.345.345.345.345.368.468.468.468.468.468.468.468.466.966.966.966.966.966.966.966.466.466.5

us-gaap:TechnologyEquipment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value55555555555555555555555555555555555555434343434343434343434343434343434342
Percentage of FiniteLivedIntangibleAssetsGross38.938.938.938.938.938.938.938.938.938.938.938.938.938.938.938.938.938.938.926.826.826.826.826.826.826.826.826.226.226.226.226.226.226.226.626.626.5

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value222222222222222222222222222222222222227.97.97.97.97.97.97.97.97.97.97.97.97.97.97.97.97.97.9
Percentage of FiniteLivedIntangibleAssetsGross15.815.815.815.815.815.815.815.815.815.815.815.815.815.815.815.815.815.815.84.94.94.94.94.94.94.94.94.84.84.84.84.84.84.84.84.84.9

us-gaap:InventoryWorkInProcess

us-gaap:InventoryWorkInProcess


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1191121101261241241371431451381251081099385656960525665133136142168172176191222251245241251234213236262243205186168160
Percentage of InventoryWorkInProcess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value4124000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel3


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value126012961453157616891813
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyEstimateOfPossibleLoss us-gaap:Range

us-gaap:LossContingencyEstimateOfPossibleLoss

srt:Maximum


Loss
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value757070758590909090
Percentage of LossContingencyEstimateOfPossibleLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Minimum


Loss
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value655555556065656565
Percentage of LossContingencyEstimateOfPossibleLoss86.778.678.673.370.672.272.272.272.2

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value5.825.61
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-31
Value255
Percentage of OperatingLossCarryforwards100.0

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2317201314162211251213
Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherDeferredCostsGross

us-gaap:OtherDeferredCostsGross


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1820240.40.09.9137.59.36.4
Percentage of OtherDeferredCostsGross100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:OtherInventoriesSpareParts

us-gaap:OtherInventoriesSpareParts


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value11121111
Percentage of OtherInventoriesSpareParts100.0100.0100.0100.0

us-gaap:OtherLongTermDebtNoncurrent

us-gaap:OtherLongTermDebtNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2718221217201618212525
Percentage of OtherLongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherPrepaidExpenseCurrent

us-gaap:OtherPrepaidExpenseCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value9.2429.986109.5056.0969.2979.9239.554
Percentage of OtherPrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanSponsorLocation

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

country:US


Pension
Period End2020-12-312019-12-312018-12-31
Value423000.0427000.0430000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0

us-gaap:ForeignPlan


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value50000.043000.0117000.0146000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities11.810.127.20.0

us-gaap:PostemploymentBenefitsLiabilityNoncurrent

us-gaap:PostemploymentBenefitsLiabilityNoncurrent


Postemployment
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1516162019202424302929
Percentage of PostemploymentBenefitsLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidTaxes

us-gaap:PrepaidTaxes


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1013191812103925
Percentage of PrepaidTaxes100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrual


Product
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-08-142015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1926000.01664000.01997000.02142000.01602000.01752000.01835000.01572000.01458000.01594000.01528000.0998000.01517000.0870000.0349000.0469000.0671000.0575000.0969000.0995000.0792000.0821000.0942000.01332000.0797000.01576000.0943000.0923000.01050000.01462000.01678000.01165000.01485000.01498000.01904000.01636000.01531000.02316000.01840000.02653000.0
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:Range

us-gaap:RevenueRemainingPerformanceObligation

srt:Maximum


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5257751025108011001100
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0

srt:Minimum


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value4256759251000950950
Percentage of RevenueRemainingPerformanceObligation81.087.190.292.686.486.4

us-gaap:SaleOfStockPricePerShare us-gaap:SubsequentEventType

us-gaap:SaleOfStockPricePerShare

us-gaap:SubsequentEvent


Sale
Period End2021-01-20
Value10.9
Percentage of SaleOfStockPricePerShare100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

gti:DeferredandRestrictedStockUnits


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value10.4112.8312.880
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

gti:DeferredandRestrictedStockUnits, gti:OmnibusEquityIncentivePlan


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value13.9610.9810.4110.4310.5510.5912.8312.9512.9513.3812.88
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue0.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2020-12-312019-12-31
Value342570.0181820.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value15.38
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-31
Value500000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-31
Value13.0115.0615.680
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeStockOption, gti:OmnibusEquityIncentivePlan


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value17.1712.6213.0113.0313.1513.4215.0615.1315.215.415.6815.6815.360
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0

us-gaap:ShortTermBorrowings

us-gaap:ShortTermBorrowings


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value0.1290.1270.1310.1478.1410.1380.1417043151061061065216138.007108.8526.465169.7794.7729.61991911881.1440.1420.1681.1614.3442.7772.1028.4260.178.27111418112.6450.1551.113
Percentage of ShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value1200
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:ValuationAllowancesAndReservesBalance


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302012-12-312011-12-312010-12-312009-12-312008-12-31
Value12135815024416520262026257410642
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ContractWithCustomerDuration
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Contract With Customer Duration
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Indefinite Lived Intangible Assets By Major Class
us-gaap:LongTermDebt
us-gaap:LongtermDebtType
(None,)
Long Term Debtus-gaap: Longterm Debt Type
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanSponsorLocation
(None,)
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrentus-gaap: Retirement Plan Sponsor Location
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components