MTX


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostDepreciationAmortizationAndDepletion

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:CostOfRevenue

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NonoperatingIncomeExpense

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ResearchAndDevelopmentExpense

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

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ShortTermInvestments

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:ConsolidationItems, us-gaap:StatementGeographical
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:MinorityInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:Range, us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:ProceedsFromSaleOfShortTermInvestments
us-gaap:Range, us-gaap:DebtInstrument
mtx:DebtInstrumentFinancialCovenantIncreaseDecreaseInBasisSpreadIfNetLeverageRatioIsLessThanCertainThresholds
us-gaap:Range, us-gaap:DebtInstrument
mtx:DebtInstrumentNetLeverageRatio
us-gaap:DebtInstrument
mtx:DebtInstrumentRequiredAnnualAmortization

mtx:IncreaseDecreaseInOperatingCapitalExcludingObligationForPensionAndOtherPostretirementBenefits

mtx:MarketPriceOfCommonStockHigh

mtx:MarketPriceOfCommonStockLow

mtx:OperatingIncomeAsPercentageOfNetSales

mtx:PaymentsToAcquireAssets

mtx:UnrecognizedTaxBenefitsIncreaseDecreaseInIncomeTaxPenaltiesAndInterestExpense

us-gaap:AssetImpairmentCharges
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:BusinessCombinationIntegrationRelatedCosts

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:DebtInstrument, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod
us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanContributionsByEmployer
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations
us-gaap:StatementEquityComponents
us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherNoncashIncomeExpense
us-gaap:StatementBusinessSegments
us-gaap:OtherRestructuringCosts

us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PensionExpenseReversalOfExpenseNoncash

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:PropertyPlantAndEquipmentAdditions
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:RepaymentsOfShortTermDebt

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings
us-gaap:StatementEquityComponents

us-gaap:RestructuringCharges

us-gaap:RestructuringCostsAndAssetImpairmentCharges

us-gaap:SeveranceCosts1
us-gaap:StatementBusinessSegments

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:BusinessAcquisition
dei:EntityNumberOfEmployees

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInUnrecognizedPensionCostsEffectTax
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
mtx:DeferredCompensationPlanAssetFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

mtx:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
mtx:InterestRateSwapAssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:LossContingenciesByNatureOfContingency
mtx:LossContingencyClaimsDismissedCumulativeNumber
us-gaap:LossContingenciesByNatureOfContingency
mtx:LossContingencyCumulativeLitigationExpenses

mtx:MarketPriceOfCommonStockClose

mtx:MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
mtx:SupplementaryPensionPlanAssetFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:EnvironmentalRemediationSite
us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:RetirementPlanType

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationCurrent

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

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

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:RetirementPlanSponsorLocation
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:Range, us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:Dividends, us-gaap:SubsequentEventType
us-gaap:DividendsPayableAmountPerShare
us-gaap:Dividends, us-gaap:SubsequentEventType
us-gaap:DividendsPayableCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestments
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:FairValueHedgeAssetsAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:FairValueHedgeLiabilitiesAtFairValue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeignCurrencyContractAssetFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventorySuppliesNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:DebtInstrument
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:TaxCreditCarryforward

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType

us-gaap:PrepaidExpenseCurrent

us-gaap:RestructuringReserve
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:SharePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AwardType
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShortTermBorrowings
us-gaap:DebtInstrument

us-gaap:TreasuryStockShares

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

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

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Short Term Investments
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Treasury Stock Shares
DividendsAndRepurchase
Dividends
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
InventoryNet
Inventory Work In Process Net Of Reserves
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:CommonStockValue ████████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▂▁4.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.84.84.84.84.84.84.84.84.84.84.84.84.84.7694.756NA4.7534.7234.7174.72.9312.923NA2.923NA2.9132.9122.9112.9092.897NANANA
us-gaap:CommonStockSharesIssued NANA49.051181NANANA48.909662NANANA48.793918NANANA48.644736NANANA48.229826NANANA47.990136NANANA47.855496NANANA47.555927NANANANA47.002939NANANANANA29.134244NANANA28.969244NANANA
us-gaap:CommonStockSharesOutstanding NANA33.882187NANANA34.544307NANANA35.190343NANANA35.374345NANANA34.969987NANANA34.784395NANANA34.649755NANANA34.350186NANANANA34.94962NANANANANA17.654965NANANA18.298551NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁34.134.0NA34.134.134.4NA35.135.335.3NA35.635.635.7NA35.635.635.6NA35.335.134.9NA35.035.034.9NA34.834.834.68NANA34.88135.03135.253NA17.73317.79NA17.8NANA18.01918.290.018415NA18.618.7490.018835
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█33.733.8NA34.134.134.4NA35.035.235.2NA35.335.335.4NA35.335.135.0NA34.934.834.8NA34.734.734.7NA34.534.534.42NANA34.61534.79934.996NA17.6417.724NA17.718NANA17.92818.1770.018276NA18.53618.70.018766
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▁█0.2538950.558734NA1.0544281.4486991.181945NA0.4566930.4703040.748754NA0.3526250.3577710.362443NA0.1845690.1865830.185104NA0.0102390.3720470.375644NA0.3955450.2385050.245128NA0.1730680.1730680.16018NANANANA0.23977NANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▁▁▂▂▂▁▁▁▄▄▂▃▁▄▃▃▃▃▃▃▃1.241.180.910.830.421.120.831.090.761.111.221.191.251.132.141.181.230.991.051.190.610.970.490.840.771.010.621.070.530.450.660.630.630.490.540.51.061.110.561.020.511.110.880.90.860.860.91.010.82
us-gaap:EarningsPerShareDiluted ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▁▁▂▂▂▁▁▁▄▄▂▃▁▄▃▃▃▃▃▃▃1.231.170.910.830.421.120.831.080.751.111.221.181.241.122.121.171.210.971.041.180.60.970.480.830.761.010.611.060.530.450.650.630.630.490.530.51.051.110.561.010.511.110.870.90.860.860.91.010.82
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
 COGS Ratio us-gaap:ProductOrService us-gaap:ProductNANA415.0375.0339.5392.3416.6423.8438.0417.4427.2444.9445.0412.2411.1405.4396.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:ServiceNANA16.813.317.725.223.625.525.820.320.319.219.719.121.119.017.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems us-gaap:OperatingSegments▇▇▆▃▁▅▆▇█▆▇██▆▆▅▅▄▄▄▆▄▆▇█▇455.6452.6431.8388.3357.2417.5440.2449.3463.8437.7447.5464.1464.7431.3432.2424.4414.1405.0401.3399.5427.0410.2430.0451.0463.4453.3NANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtx:EnergyServicesNANA16.813.317.725.223.625.525.820.320.319.219.719.121.119.017.918.720.319.820.025.833.440.949.358.676.185.448.6NANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtx:PerformanceMaterials▆▅▅▄▄▄▅▅▅▅▅▅▅▄▄▄▄▄█▂▃▂▃▂▃▂▃▃▁238.4230.9202.2190.6173.8186.2201.4207.3215.4199.2206.8219.5214.5187.3195.8188.8180.3169.9319.0119.5128.6119.0131.3126.5129.1127.9141.4135.675.8NANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtx:Refractories▅▄▄▂▁▃▄▄▅▄▅▅▅▅▄▃▃▄▃▂▄▄▃▅▅▄███▆▇74.573.973.9000000000000359.355.969.073.473.477.573.877.979.179.675.371.468.968.970.268.063.473.969.268.277.476.473.992.990.491.684.789.4NA86.8NANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtx:SpecialtyMinerals▅▆▅▃▁▄▅▅▅▅▅▅▆▆▅▆▅▅▄▆▆▇▇▇▇▆▇▇█▇█142.7147.8138.9125.1109.8137.1141.8143.1145.1144.4142.5146.3150.9149.6143.9147.7147.0146.2138.0147.3150.6155.6157.7156.5156.5154.0159.6163.0167.9159.7167.3NA167.4NANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments mtx:PerformanceMaterialsNANA202.2190.6173.8186.2NANANANANANANANANANANANA135.7119.5128.6119.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
 TTM Greenblatt ROC _ _▇▇▆▅▂▆▅▆▄▇▇█▇▇▅██▇▆█▄▆▃▅▆▇▄█▃▁▃▃▃▂▂▁▂▂▂▂▂▁▁▁▁▁63.758.854.548.527.257.747.753.545.562.062.368.262.862.645.766.868.561.756.567.339.557.637.749.952.859.942.666.835.823.58433.532.832.75732.37927.13625.727.84829.47630.126.99227.925.225.39425.06724.71422.8NANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:ComprehensiveIncomeNetOfTax ▆▅▆▆▅▄▅▅▄▆▆▅▃▇█▇▇▆▃▆▄▆▄▃▅▄▁▄▅▅▇47.018.934.133.825.80.717.621.86.541.048.123.4-8.258.074.450.756.648.4-9.744.913.144.89.4-4.125.910.6-41.310.223.218.65550.001NA31.43512.0356.7924.35528.5257.349NA28.051NANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▅▄█▆▆▁▅▃▄▆▄▄▁▇▆▅▅▆▂▃▄▅▃▃▄1.30.62.41.51.5-0.31.10.30.81.40.60.6-0.51.81.51.31.21.5-0.10.40.71.20.50.20.7NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▆▅▆▆▅▃▅▅▄▆▆▅▃▇█▇▇▆▃▆▄▆▄▃▅▄▁▄▅▅▆48.319.536.535.327.30.418.722.17.342.448.724.0-8.759.875.952.057.849.9-9.845.313.846.09.9-3.926.69.6-41.110.923.919.08650.711NA32.011.87.171NANANANANANA-21.285-9.5NANANANANANA
us-gaap:CostDepreciationAmortizationAndDepletion ▂▅▄▅▃▁██23.224.123.723.923.422.924.824.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServicesSold ▆▆▅▄▄▅▆▆▆▆▆▆▆▅▅▅▅▄▄▄▅▅▅▆▆▆██▅▁▁340.2340.8320.5289.9268.3310.7332.5338.1351.8328.0334.7344.9348.8317.8317.6305.2294.4291.3289.9284.3305.9297.5320.6332.1337.2336.7383.6398.5318.4189.1197.6NA194.3198.0NANANANANANANANANANANANANANANA
us-gaap:CostOfRevenue ▆▆▅▄▄▅▆▆▆▆▆▆▆▅▅▅▅▄▄▄▅▅▅▆▆▆██▅▁▁340.2340.8320.5289.9268.3310.7332.5338.1351.8328.0334.7344.9348.8317.8317.6305.2294.4291.3289.9284.3305.9297.5320.6332.1337.2336.7383.6398.5318.4189.1197.6NA194.3198.0NANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▆▆▆▅▄▅▅▅▆▅▆▆▆▆▆▆▆▆▆▆▆▆▅▆▇▆▇█▅▁▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁115.4111.8111.398.488.9106.8107.7111.2112.0109.7112.8119.2115.9113.5114.5119.2119.7113.7111.4115.2121.1112.7109.3118.9126.2116.6132.4145.0102.755.31259.059.959.9258.84954.88853.154.99956.34256.854.93755.652.752.9153.67452.94250.652.17855.04551.368
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▇▇▅▅▁▇▄▅▄▇▇▇█▇▄██▆▆▇▃▆▁▅▄▆▃▇▂▂▄52.349.438.635.814.649.035.040.932.249.248.552.054.449.233.754.657.145.545.653.326.245.214.338.232.347.727.351.720.823.27432.894NA31.52330.90727.30424.74627.19828.708NA26.394NA25.86423.73124.26823.87723.0224.77928.04723.003
us-gaap:IncomeTaxExpenseBenefit ▇▇▇▇▆▇▇▇▇▇▇▇▇▇▁██▇▇█▇█▆▇▇█▇█▇▇▇9.88.96.87.00.99.75.82.65.19.35.19.710.39.3-42.212.113.410.18.611.54.510.7-3.08.45.312.16.014.43.47.0039.296NA8.9528.2217.76.5078.0158.469NA7.786NA5.87.3877.1127.1876.3387.318.4146.901
us-gaap:IncomeTaxesPaidNet ▆▅▄▅▅▄▅▄▅▄▆▅▇▄▆▄█▄▄▅▆▄▆▄▅▆▁▄▄▄▄15.18.53.110.88.46.29.66.27.95.814.98.016.94.012.26.224.54.86.57.012.05.113.96.210.213.5-11.35.95.5255.5754.018NA8.9496.8765.6576.1221.2863.509NA10.583NA9.2026.8667.088.7524.4739.118.1893.128
us-gaap:InterestExpense ▅▅▅▅▄▅▅▆▅▆▆▆▆▅▅▅▅▆▆▇▇▇▇▇█▇██▅▁▃9.19.910.710.18.19.39.911.010.911.412.011.711.510.710.910.510.211.813.013.413.914.115.414.515.815.416.616.08.90.85.863NA-0.8-0.8-0.85.621-0.8-0.8NA-0.8NA5.654-0.8-0.8-0.85.736-0.9-0.7NA
us-gaap:InterestPaidNet █▁14.114.0NA7.18.08.9NA10.911.010.9NA12.513.28.9NA6.910.711.3NA16.212.816.6NA10.415.619.9NA17.11.4410.059NANA0.4181.5390.172NA0.0541.579NA0.158NANA0.2371.5830.051NA0.0921.4780.1
us-gaap:NetIncomeLoss ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▁▁▂▂▂▁▁▁▁▂▂▁▁▂▁▁▁▁▁▂▁41.939.931.128.314.438.629.038.026.639.143.141.944.139.975.841.743.034.636.741.621.233.917.029.226.635.121.337.018.515.61522.621.921.86417.1218.75617.718.6319.71519.718.03218.019.615.68816.41315.78115.816.70218.95915.369
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▇▇▅▆▁▆▃▇▆▅▅▆▇█▅█▄▆▄▅▇▅▄▇▅▅▃▄▅▃▆1.11.10.91.00.51.00.71.11.00.90.91.01.11.20.91.20.81.00.80.91.10.90.81.10.90.90.70.80.90.6640.969NA0.6860.6190.848-0.50.5530.524NA0.576NA-0.40.6560.7430.909-0.80.7670.6740.733
us-gaap:NonoperatingIncomeExpense ▅▅▃▄▄▅▄▄▄▄▄▃▆▄▄▄▅▃▅▄▄▄▁▅▂▄▃▄▄██-11.4-9.4-15.9-12.7-12.6-8.7-12.7-12.6-13.3-12.8-13.8-16.2-8.4-13.4-12.0-12.2-11.4-16.2-10.9-14.0-13.3-12.4-23.4-11.7-20.5-12.2-15.3-15.1-15.0-0.31-0.57NA-1.234-1.4720.168-0.979-0.65-0.768NA-0.598NA0.701-1.663-0.799-0.8370.263-0.1770.535-0.049
us-gaap:OperatingIncomeLoss ▇▇▆▅▂▆▅▆▄▇▇█▇▇▅██▇▆█▄▆▃▅▆▇▄█▃▁▃▃▃▂▂▁▂▂▂▂▂▁▁▁▁▁▁▂▁63.758.854.548.527.257.747.753.545.562.062.368.262.862.645.766.868.561.756.567.339.557.637.749.952.859.942.666.835.823.58433.532.832.75732.37927.13625.727.84829.47630.126.99227.925.225.39425.06724.71422.824.95627.51223.052
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax -1.0NANANA-0.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▃█▆▆▂▆▃▄▅▅▃▁▆▆▆▆▆▂▅▄▆▄▂▅▃▃▃▅▅▅2.0-28.939.56.67.9-43.112.3-23.1-18.7-0.4-5.5-23.1-54.515.210.98.013.113.0-42.21.2-9.09.9-10.5-35.8-2.4-27.8-29.5-27.73.62.087-1.492NA7.57-7.826-14.785-0.1168.562-16.066NANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▆▄▆▆▇▃▅▅▄▆▆▄▂▇▆▇▇▇▂▆▅▇▅▃▆▄▁▄▆▆█5.3-21.54.56.012.4-39.2-11.0-17.0-20.32.44.7-18.9-53.918.7-0.89.114.014.3-47.32.8-8.511.2-7.8-34.2-0.9-26.4-63.1-26.94.52.827.2NA9.4-5.9NANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▆▆▃▅▆▆▄▅▄▅▅▅█▄▅▅▅▆▇▆▆▇▁█▆█▇▇▆▆▇-0.10.5-4.2-1.5-0.20.6-2.8-1.6-2.4-1.4-1.0-0.93.1-2.7-1.1-1.7-1.2-0.52.1-0.60.61.7-8.02.8-0.23.21.30.9-0.3-0.21.314NA-1.1-1.4NANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▂▁▂43.041.032.029.314.939.629.639.127.640.044.042.945.241.176.742.943.835.637.542.522.334.817.730.327.536.022.037.819.416.27923.558NA22.5517.73919.60418.23919.18320.239NA18.608NA20.06416.34417.15616.6916.68217.46919.63316.102
us-gaap:ResearchAndDevelopmentExpense ▁▂▁▁▂▂▃▃▁▁▃▂▇▆▅▅▆▅▅▅▆▅▅▆▅▅▇█▇▂▂4.95.04.94.85.15.15.45.24.94.85.25.06.46.15.95.96.15.85.95.96.15.95.86.25.85.96.46.66.35.0945.107NA5.3024.8264.8184.9945.1055.026NA5.047NA4.8414.7234.8974.8694.894.6354.9285.124
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆▆▅▄▄▅▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▆▆▆▇█▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁455.6452.6431.8388.3357.2417.5440.2449.3463.8437.7447.5464.1464.7431.3432.1424.4414.1405.0401.3399.5427.0410.2429.9451.0463.4453.3516.0543.5421.1244.396256.6254.2254.192256.844251.289244.2250.346253.969251.4257.138254.5251.7262.192268.399262.52243.3249.812255.77253.457
us-gaap:SellingGeneralAndAdministrativeExpense ▆▆▆▅▅▅▆▆▆▅▅▅▅▅▆▅▅▅▅▅▅▆▅▆▆▅▆█▆▁▁46.448.049.242.141.843.449.346.948.442.943.545.445.344.448.345.644.144.445.242.445.146.742.747.946.245.550.059.746.321.53322.913NA21.86121.64422.93422.37722.04621.84NA22.898NA22.66622.55323.7123.12922.95522.58722.59222.34
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:Assets ████▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇█████▁▁3253.33213.23209.43214.13056.93069.13112.63125.93149.43163.43087.13112.53128.43006.32970.42983.42917.02896.72863.42938.72944.12981.42980.03148.53201.93159.53226.73273.83300.11237.2441217.547NA1226.8621213.6711211.1191211.1891209.2651185.381NA1186.751NA1164.9551144.3681175.2631143.3591116.105NANANA
us-gaap:Liabilities ▆▆▆▆▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇█████▁▁1714.41710.81710.71740.21616.11657.11678.01692.31727.81736.01701.81770.91811.01674.51691.31781.11778.01814.91832.51897.41951.72002.02042.32223.82274.52260.52337.82348.12386.0342.558343.139NA394.588398.116398.36397.47380.92387.81NA388.921NA396.935352.435353.614333.417333.41NANANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇█████▁▁3253.33213.23209.43214.13056.93069.13112.63125.93149.43163.43087.13112.53128.43006.32970.42983.42917.02896.72863.42938.72944.12981.42980.03148.53201.93159.53226.73273.83300.11237.2441217.547NA1226.8621213.6711211.1191211.1891209.2651185.381NA1186.751NA1164.9551144.3681175.2631143.3591116.105NANANA
us-gaap:StockholdersEquity ███▇▇▇▇▇▇▇▆▆▆▆▅▅▄▃▃▃▂▂▂▂▂▁▁▂▁▁▁1499.71464.01460.81438.11406.51379.81402.71402.71390.91393.51353.51310.21288.91302.81251.71176.31113.61056.01006.51013.4964.8951.2910.5897.9900.4872.3863.0900.2889.3867.681847.538NA808.979792.843789.558790.411802.962772.793NA770.665NA741.612763.821791.995781.337755.523NANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:AssetsCurrent █▇▇▇▄▄▅▅▅▄▄▄▄▄▃▃▂▂▁▂▂▂▂▄▄▃▅▆▆▃▂1085.51044.61033.61047.9884.4897.6919.2920.1931.1903.9876.3903.6899.1884.1852.2860.8804.0786.1751.1810.2806.2808.0803.6878.0901.7869.1924.6970.7987.6834.77815.117NA803.643785.837774.87764.485770.228748.157NA743.525NA720.289718.485739.56706.341675.572NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆▅▅▆▂▂▃▂▂▂▂▂▂▂▂▂▁▁▁▂▂▂▂▂▂▂▃▂▁██403.6371.4367.7379.0232.8214.3241.6213.0214.5202.7208.8206.9203.0223.2212.2211.7177.7168.5188.5199.7201.6211.9229.4224.9224.5193.9249.6202.7191.2493.035490.267NA469.654458.065454.331454.092449.106421.459NA415.005NA395.152382.528396.106380.804367.827361.893336.777325.039
us-gaap:ShortTermInvestments ▃▂▂▂▃▂▁▁▃▂▂▂▂▂▂▂▃▂▁▃▂▂▂▂▂▂▁██▇▇5.34.34.12.85.43.81.61.55.24.33.84.32.93.92.72.84.83.82.05.14.03.52.62.92.92.10.817.716.715.6915.769NA16.29515.89815.58614.17812.719.268NA20.302NA18.49416.69716.76318.52816.707NANANA
us-gaap:AccountsReceivableNetCurrent ▅▆▅▅▅▆▆▆▇▇▆▇▇▆▆▆▆▆▅▅▆▅▅▆▇▇▇██▁▁368.5377.1369.0363.2336.8382.7376.2403.8411.9406.4387.3410.5420.3398.6383.0389.1378.8380.2341.3363.9374.9365.6348.7385.7406.2414.8412.6443.7461.1217.299204.449NA207.221205.917197.834193.328194.24196.509NA198.131NA194.317197.818200.7193.621181.128NANANA
us-gaap:InventoryNet █▇▇▇█▇▇██▇▇▇▇▆▆▆▆▅▅▆▅▅▅▅▆▆▆▇▇▁▁261.9247.3248.2255.2269.8252.0253.3256.9258.4254.4239.2243.4235.5221.2219.3221.2211.9196.3186.9209.1197.5197.2194.9203.6209.0207.4211.8233.7243.591.61489.169NA90.30989.04488.75584.56993.14390.573NA89.556NA90.7697.52597.73189.27386.464NANANA
us-gaap:OtherAssetsCurrent NANA9.2NANANA11.1NANANA5.2NANANA4.9NANANA4.4NANANA3.1NANA23.824.2NANANA5.9NANANANANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▅▅▅▅▃▅▅▅▄▃▃▃▃▃▂▃▂▃▂▂▁▁▁██46.244.544.647.739.644.846.544.941.136.137.238.537.437.235.036.030.837.332.432.428.229.828.060.959.1NA49.872.975.117.13215.463NA20.16416.91318.36418.31821.03920.348NA20.531NA21.56623.91728.26NA23.446NANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:NoncurrentAssets NANA2043.9NANANA2063.2NANANA2129.4NANANA2037.1NANANA2034.8NANANA2098.2NANANA2165.1NANANA372.7NANANANA386.6NANANANANA386.2NANANA404.1NANANA
 us-gaap:NoncurrentAssets us-gaap:ConsolidationItems,us-gaap:StatementGeographical srt:ReportableGeographicalComponents,country:USNANA1723.2NANANA1742.3NANANA1767.7NANANA1774.4NANANA1794.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:ConsolidationItems,us-gaap:StatementGeographical srt:ReportableGeographicalComponents,mtx:CanadaLatinAmericaNANA11.3NANANA13.0NANANA13.7NANANA14.8NANANA14.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:ConsolidationItems,us-gaap:StatementGeographical srt:ReportableGeographicalComponents,mtx:EuropeAfricaNANA182.9NANANA190.7NANANA225.0NANANA115.9NANANA98.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:ConsolidationItems,us-gaap:StatementGeographical srt:ReportableGeographicalComponents,srt:AsiaNANA126.5NANANA117.2NANANA123.0NANANA132.0NANANA127.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical mtx:TotalInternationalNANA320.7NANANA320.9NANANA361.7NANANA262.7NANANA240.3NANANA268.9NANANA299.9NANANA137.5NANANANA150.8NANANANANA146.4NANANA164.2NANANA
us-gaap:PropertyPlantAndEquipmentGross █▇█▅▅▆▇▆▆▇▇▇▇▅▅▃▂▁▁▃▂▄▂2283.32264.92276.92228.82217.92234.52257.02241.72246.82269.02256.02254.52254.22218.52219.62189.12169.82141.22141.42178.32164.32193.62167.3NANA2153.62174.2NANANA1282.3NANANANA1261.952NANANANANA1248.649NANANA1238.422NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ███▇▇▇▇▆▆▆▆▅▅▆▆▅▅▄▄▄▄▄▃▂▂▁▁▂▂▁▁1249.61233.61237.31201.71194.31199.91204.21182.81177.71167.91153.11148.11132.31152.71158.31130.01115.01089.61089.61107.11095.01091.11063.01015.61014.9978.1992.1996.81004.5988.047976.2NA967.765949.973943.676-944.283933.525945.375NA948.112NA-930.515930.089943.336925.717905.625NANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇████▁▁1033.71031.31039.61027.11023.61034.61052.81058.91069.11101.11102.91106.41121.91065.81061.31059.11054.81051.61051.81071.21069.31102.51104.31125.71156.91175.51182.11219.01222.9306.379306.071NA307.882308.803312.436317.669318.891314.595NA316.644NA318.134322.574329.813328.995332.797NANANA
us-gaap:Goodwill █████████████████████████████▁▁806.4806.5808.5806.2805.8805.6807.4806.8807.9812.4812.4808.1810.6779.5779.3779.6779.4778.7778.7780.3780.6781.3781.2789.2781.7768.3770.9767.3769.364.27464.432NA64.68364.59265.08165.82965.73865.316NA65.788NA64.67165.35967.34867.82967.156NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▂▂▃▃▃▄▄▅▆▇▆▆▂▂▃▃▄▄▅▅▆▆▇▇▆▆██190.4192.5195.8197.0198.5200.3203.0204.8207.9211.8214.1210.3212.4194.5196.5198.4200.4202.4204.4206.4208.5210.6212.7214.7217.0210.2212.1217.7219.7NA3.0NANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA50.9NANANA44.844.547.147.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▆▆▆▆▇▆▆▆▆▆▂▃▃▃▂▄▄▂▂▃▄▄▂██▄▄▅▅▁▁113.5114.7106.6113.1121.6107.4107.2112.0108.0109.455.158.058.857.355.585.578.452.250.370.679.579.047.6140.9144.679.081.499.1100.631.82131.927NA50.65454.43958.73263.20654.40857.313NA60.794NA61.86137.9538.54240.19440.58NANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:AccountsPayableCurrent ▆▆▄▄▄▅▅▆▇▆▆▇▇▆▆▇▅▄▄▅▅▅▅▆▇▆▆▇█▂▁177.7167.7148.3140.7139.4158.0163.4176.0188.2178.2169.1184.7195.7177.3179.0181.0164.2147.3144.9155.8156.4159.8152.4176.3183.3169.0170.4184.3204.2109.54694.855NA105.318110.765109.85798.371102.203107.03NA106.979NA103.354105.997107.20690.95780.728NANANA
us-gaap:LiabilitiesCurrent ▃▃▃▃█▅▆▆▆▅▅▆▆▄▄▄▄▃▃▄▄▄▄▅▅▄▅▅▅▁▁293.9288.8295.8272.0509.0381.5398.5409.9405.6390.8381.9420.0432.4298.8310.0323.7298.3297.4295.5321.4327.6314.3318.6366.4377.0314.7352.9355.5371.6180.322180.894NA176.644256.798250.128250.098176.998180.863NA174.479NA180.902183.182172.844152.602155.237NANANA
us-gaap:LongTermDebtCurrent ▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▂▁▁0.90.91.00.9149.21.82.11.82.12.73.33.03.03.83.86.56.56.96.84.64.73.23.12.212.70.40.33.923.88.28.2NA0.5775.56677.2676.9771.9779.976NA8.555NA8.5528.5490.5430.5350.0NANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA11.7NANANA11.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▅▅▃▆▅▅▃▆▅▅▂▅▅▅▂▆▅▆▂▇▇▆▃██▆▃▇▆▂▁114.8120.277.5130.4120.1120.876.9129.1111.1105.254.6124.0115.5111.157.1130.0121.3137.354.9154.7160.5145.575.4181.7175.0139.375.8162.6138.957.82327.364NA63.83563.44655.78524.85667.10858.854NA52.65NA23.37961.6558.59353.82928.138NANANA
us-gaap:TaxesPayableCurrent NANA8.7NANANA4.2NANANA1.6NANANA8.4NANANA21.5NANANA16.7NANANA27.0NANANA7.103NANANANA8.862NANANANANA5.334NANANA6.606NANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:LongTermDebt ▅▅▅█▁935.3934.5934.21013.2796.9NA826.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ▅▅▅▆▄▅▅▅▅▅▅▅▅▅▅▅▆▆▆▆▆▇▇▇▇▇███▁▁934.4933.6933.21012.3647.7824.9824.3844.7874.2893.4907.8946.1966.1960.8959.8990.21019.31050.71069.91117.31166.01217.71255.31325.61364.01418.41455.51512.31529.175.075.0NA83.28.28.28.47883.75383.751NA85.455NA85.44985.72193.7193.69592.621NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▂▂▁████167.1165.8163.7180.7181.4181.7180.6NANANA196.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▇██▄▄▄▄▁▁▁▁▃▄▅▅172.4176.8179.0141.3145.9146.1148.9120.2123.0124.0124.2136.4142.1151.1155.0NANA147.3147.3NANANA141.8NANANA146.5NANA58.05657.893NA105.902107.192108.719108.03590.9793.328NA98.598NA97.318NANANA48.563NANANA
us-gaap:MinorityInterest ██▇▆▆▅▅▄▄▅▄▄▃▃▂▂▁▂▁▃▃▃▂▂▂▂▂▂▁▂▂39.238.437.935.834.332.231.930.930.733.931.831.428.529.027.426.025.425.824.427.927.628.227.226.827.026.725.925.524.827.00526.87NA23.29522.71223.20123.30825.38324.778NA27.165NA26.40828.11229.65428.60527.172NANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▅▅▅▅▄▄▄▅▅▃▄▄▄▄██▃▃███▃███▂▆▆▁▁146.6145.8139.0133.9132.1122.9125.7123.2130.8129.791.1103.9106.9105.0107.1219.4227.783.281.0216.3214.1217.974.6221.4227.9214.368.4161.4168.129.1829.352NA28.84225.92631.31330.85929.19929.868NA30.389NA33.26683.53287.0687.1236.989NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANA49.2NANANA43.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA12.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA9.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA7.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA6.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA24.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:StockholdersEquity ███▇▇▇▇▇▇▇▆▆▆▆▅▅▄▃▃▃▂▂▂▂▂▁▁▂▁▁▁1499.71464.01460.81438.11406.51379.81402.71402.71390.91393.51353.51310.21288.91302.81251.71176.31113.61056.01006.51013.4964.8951.2910.5897.9900.4872.3863.0900.2889.3867.681847.538NA808.979792.843789.558790.411802.962772.793NA770.665NA741.612763.821791.995781.337755.523NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ███▇▇▇▇▇▇▇▆▆▆▆▅▄▄▃▃▃▂▂▂▂▂▁▁▂▁▁▁1538.91502.41498.71473.91440.81412.01434.61433.61421.61427.41385.31341.61317.41331.81279.11202.31139.01081.81030.91041.3992.4979.4937.7924.7927.4899.0888.9925.7914.1894.686874.408NA832.274815.555812.759813.719828.345797.571NA797.83NA768.02791.933821.649809.942782.695NANANA
us-gaap:CommonStockValue ████████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▂▁4.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.84.84.84.84.84.84.84.84.84.84.84.84.84.7694.756NA4.7534.7234.7174.72.9312.923NA2.923NA2.9132.9122.9112.9092.897NANANA
us-gaap:AdditionalPaidInCapitalCommonStock █▇▇▆▆▆▆▅▅▅▅▅▄▄▄▄▂▂▂▁▁466.7459.3453.3448.1445.5442.8442.2438.1435.3432.6431.9429.6426.9423.2422.7420.0405.5402.8400.0395.4390.0NA387.6NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▇▇▆▆▆▆▅▅▅▅▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁2089.72049.52011.31981.81955.31942.61905.71878.41842.21817.41769.11727.91687.71645.31607.21533.21493.31452.01419.11384.21344.41324.91292.71277.41250.01225.11191.81172.21136.91120.1451106.252NA1085.3791065.2491049.871032.8691016.851999.102NA980.275NA963.13944.374929.58914.077899.211NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▁▁▁▁▂▂▃▃▃▃▃▅▄▄▄▄▃▅▄▅▄▅▅▅▆▇███-324.3-329.3-308.3-311.4-316.9-328.2-290.4-279.0-262.8-242.7-233.7-238.8-220.2-167.9-186.1-184.8-193.7-207.3-221.1-174.7-178.1-169.9-180.9-173.3-140.1-139.4-112.9-50.3-23.6-28.224-31.265NA-58.679-68.247-63.162-51.198-37.783-47.691NA-35.312NA-45.331-4.75918.87112.625-3.59NANANA
us-gaap:TreasuryStockValue █▇▆▅▅▅▄▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁737.3720.4700.4685.3682.3682.3659.7639.7628.7618.7618.7613.4610.4602.7597.0597.0596.3596.3596.3596.3596.3596.0593.7593.7593.7593.7593.7593.7593.7593.665593.665NA585.899562.04551.337541.889522.943520.211NA514.234NA514.234511.237489.867-476.023466.23NANANA
us-gaap:MinorityInterest ██▇▆▆▅▅▄▄▅▄▄▃▃▂▂▁▂▁▃▃▃▂▂▂▂▂▂▁▂▂39.238.437.935.834.332.231.930.930.733.931.831.428.529.027.426.025.425.824.427.927.628.227.226.827.026.725.925.524.827.00526.87NA23.29522.71223.20123.30825.38324.778NA27.165NA26.40828.11229.65428.60527.172NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▄▄2.82.8NA2.52.50.1NA2.52.50.6NA2.42.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANA1.7321.8NANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders █▁0.60.1NANA0.5NANA0.13.80.10.21.50.00.20.00.71.50.23.40.11.30.10.20.3NANANANANANANANANANANANANANANANANA-1.2990.0NANANANANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▄█▅▅▂▇▅▆▂▆▄▄▃▅▆▅▁▅▅67.150.992.254.363.830.379.860.267.530.870.253.244.535.757.073.061.715.960.962.1NANA75.380.2NANA120.083.692.02315.17743.963NA33.81932.32624.68935.12539.98740.086NA24.72NA40.78236.18637.62919.06234.35532.59842.29733.169
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇███████████▁█▇█████-21.5-18.6-21.3-21.0-16.8-19.6-11.6-12.8-19.4-18.2-19.1-14.0-147.7-19.2-23.0-18.7-21.1-14.7-13.9-16.1NANA-14.9-19.8NANA-5.2-27.3-1819.894-10.606-11.103NA-11.068-14.368-9.622-15.443-7.184-14.961NA-10.453NA-17.061-16.936-11.251-9.777-13.6-9.829-7.427-10.236
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▁█▃▃▃▃▃▄▃▃█▄▃▃▃▃▃▃-14.3-19.3-94.8110.2-32.4-26.0-43.2-44.1-36.8-19.2-48.5-32.996.2-10.6-35.5-21.7-35.4-25.6-49.4-48.2NANA-50.1-50.5NANA-61.0-38.71425.277-0.777-13.153NA-16.775-13.311-6.973-16.23-7.698-10.655NA0.604NA-4.48-19.631-13.096-5.129-12.756-9.506-12.907-1.265
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▃▂▂█▃▁▃▂▃▂▂▂32.23.7-11.3146.218.5-27.328.6-1.511.8-6.11.93.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▄█▅▅▂▇▅▆▂▆▄▄▃▅▆▅▁▅▅67.150.992.254.363.830.379.860.267.530.870.253.244.535.757.073.061.715.960.962.1NANA75.380.2NANA120.083.692.02315.17743.963NA33.81932.32624.68935.12539.98740.086NA24.72NA40.78236.18637.62919.06234.35532.59842.29733.169
us-gaap:NetIncomeLoss ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▁▁▂▂▂▁▁▁▁▂▂▁▁▂▁▁▁▁▁▂▁41.939.931.128.314.438.629.038.026.639.143.141.944.139.975.841.743.034.636.741.621.233.917.029.226.635.121.337.018.515.61522.621.921.86417.1218.75617.718.6319.71519.718.03218.019.615.68816.41315.78115.816.70218.95915.369
us-gaap:ProfitLoss ▄▄▃▃▁▄▃▄▂▄▄▄▄▄█▄▄▃▄▄▂▃▁▃▂▃▂▄▂▁▂43.041.032.029.314.939.629.639.127.640.044.042.945.241.176.742.943.835.637.542.522.334.817.730.327.536.022.037.819.416.27923.558NA22.5517.73919.60418.23919.18320.239NA18.608NA20.06416.34417.15616.6916.68217.46919.63316.102
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇███████████▁█▇█████-21.5-18.6-21.3-21.0-16.8-19.6-11.6-12.8-19.4-18.2-19.1-14.0-147.7-19.2-23.0-18.7-21.1-14.7-13.9-16.1NANA-14.9-19.8NANA-5.2-27.3-1819.894-10.606-11.103NA-11.068-14.368-9.622-15.443-7.184-14.961NA-10.453NA-17.061-16.936-11.251-9.777-13.6-9.829-7.427-10.236
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▄▆▂▃▄▂▃▄▄▅▂▇▄▆▆▅▂▂▄▃▃▃▆▇▇▅██▁▁22.117.721.014.215.016.613.216.317.917.619.514.324.217.922.521.120.013.113.518.015.215.715.521.824.524.219.425.725.39911.30111.803NA10.36912.9788.68114.28414.01214.48NA9.354NA15.14714.9713.7388.20510.4498.0337.7068.33
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▁█▃▃▃▃▃▄▃▃█▄▃▃▃▃▃▃-14.3-19.3-94.8110.2-32.4-26.0-43.2-44.1-36.8-19.2-48.5-32.996.2-10.6-35.5-21.7-35.4-25.6-49.4-48.2NANA-50.1-50.5NANA-61.0-38.71425.277-0.777-13.153NA-16.775-13.311-6.973-16.23-7.698-10.655NA0.604NA-4.48-19.631-13.096-5.129-12.756-9.506-12.907-1.265
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA0.0NANANANANANANANANANANA0.00.00.00.06.00.00.01.21.61.16.62.50.80.91544.40.075.0NA0.0NANA0.00.00.0NA0.0NA0.00.00.01.5960.00.00.00.0
us-gaap:RepaymentsOfLongTermDebt ▁▁▄█▂▁▂▂▂▂▃▂▁▁▂▂▂▂▃▃▃▃▃▃▃▃▃▂▄▁▄0.30.580.3178.530.80.521.130.520.815.838.920.86.20.434.030.132.522.352.050.151.040.151.450.150.340.061.838.274.30.775.572NA0.0NANA0.2788.0NANANANA0.2750.0NANA0.0NANANA
us-gaap:PaymentsOfDividendsCommonStock ▁▁▁▁▁▁▁██▁██1.71.71.71.71.71.71.71.81.81.71.81.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Dividends ▄▄1.71.7NA1.81.71.7NA1.81.81.71.81.71.71.81.71.81.81.71.81.71.81.71.61.91.71.81.71.75.2-1.7-1.746NA-1.7-1.7-1.8-1.708-0.9-1.0NA-0.8NA-0.902-0.9NANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▆▇▆▂▁█▇▄▄▁▃▂▃▃▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▄16.920.015.13.00.022.620.011.010.00.05.33.17.65.70.00.70.00.00.00.00.22.40.00.00.00.00.00.00.00.08.866NA23.62911.6947.58717.1743.2065.504NA0.0NA4.57220.1413.4999.79312.3795.11410.4290.0
  2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument srt:Minimum,mtx:TermLoanFacilityVariableTranche████▁7.5e-077.5e-077.5e-077.5e-077.5e-09NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value4900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04769000.04756000.04753000.04723000.04717000.04700000.02931000.02923000.02923000.02913000.02912000.02911000.02909000.02897000.02888000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.20.10.10.10.40.40.40.40.40.40.20.20.20.30.30.20.30.30.3

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4948484848474747472928
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3334353534343434341718
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-302013-03-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-042010-04-04
Value343434343435353535353535353535353435353434343434353517171718180.01841518180.018835
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-302013-03-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-042010-04-04
Value333334343435353535353535353534343434343434343434343417171717180.01827618180.018766
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-03-31
Value253900.0558730.01054400.01448700.01181900.0456690.0470300.0748750.0352620.0357770.0362440.0184570.0186580.0185100.010239.0372050.0375640.0395540.0238500.0245130.0173070.0173070.0160180.0239770.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value1.241.180.910.830.421.120.831.090.761.111.221.191.251.132.141.181.230.991.051.190.610.970.490.840.771.010.621.070.530.450.660.630.630.490.540.51.061.110.561.020.511.110.880.90.860.860.91.010.82
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value1.231.170.910.830.421.120.831.080.751.111.221.181.241.122.121.171.210.971.041.180.60.970.480.830.761.010.611.060.530.450.650.630.630.490.530.51.051.110.561.010.511.110.870.90.860.860.91.010.82
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-01
Value47183433250.717216.5414823-8.25874505648-9.74413449.4-4.12510-41.31023185031126.7924.355287.34928
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.34.27.98.77.20.24.04.91.49.410.75.0-1.813.417.211.913.712.0-2.411.23.110.92.2-0.95.62.3-8.01.95.57.619.512.44.72.71.811.42.910.9

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-28
Value1300000.0600000.02400000.01500000.01500000.0-300000.01100000.0300000.0800000.01400000.0600000.0600000.0-500000.01800000.01500000.01300000.01200000.01500000.0-100000.0400000.0700000.01200000.0500000.0200000.0700000.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.10.60.40.4-0.10.20.10.20.30.10.1-0.10.40.30.30.30.4-0.00.10.20.30.10.00.2

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312011-12-312011-10-02
Value48193635270.418227.3424824-8.75975525749-9.84513469.9-3.9269.6-41.11023195032117.171-21.285-9.5
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.64.38.59.17.60.14.24.91.69.710.95.2-1.913.917.612.314.012.3-2.411.33.211.22.3-0.95.72.1-8.02.05.77.819.712.64.62.9-8.5-3.6

Cost Depreciation Amortization And Depletion

us-gaap:CostDepreciationAmortizationAndDepletion

us-gaap:CostDepreciationAmortizationAndDepletion


Cost
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-29
Value2324232323222424
Percentage of CostDepreciationAmortizationAndDepletion100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.15.35.56.26.65.55.65.5

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value340340320289268310332338351328334344348317317305294291289284305297320332337336383398318189197194198
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.775.374.274.775.174.475.575.375.974.974.874.375.173.773.571.971.171.972.271.271.672.574.673.672.874.374.373.375.677.476.976.477.1

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:Product


Cost
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-02
Value308280256294317320334314320332335305303293282
Percentage of CostOfGoodsAndServicesSold96.496.995.694.795.494.894.995.795.996.396.196.095.796.096.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.572.371.870.472.171.372.071.771.771.672.270.770.369.068.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product0.074.975.675.00.075.676.375.20.074.675.374.00.072.371.4

us-gaap:Service


Cost
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-02
Value119.011161517171413121312131211
Percentage of CostOfGoodsAndServicesSold3.63.14.45.34.65.25.14.34.13.73.94.04.34.04.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.72.33.34.03.53.93.83.23.12.82.93.03.22.92.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service0.067.766.165.90.069.069.069.00.066.768.567.00.064.265.4

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value340340320289268310332338351328334344348317317305294291289284305297320332337336383398318189197194198
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.775.374.274.775.174.475.575.375.974.974.874.375.173.773.571.971.171.972.271.271.672.574.673.672.874.374.373.375.677.476.976.477.1

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value11511111198881061071111121091121191151131141191191131111151211121091181261161321451025559595958545354565654555252535250525551
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.324.725.825.324.925.624.524.724.125.125.225.724.926.326.528.128.928.127.828.828.427.525.426.427.225.725.726.724.422.623.023.623.622.921.821.722.022.222.621.421.820.920.220.020.220.820.921.520.3

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value52493835144935403249485254493354574545532645143832472751202332313027242728262523242323242823
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.510.98.99.24.111.78.09.16.911.210.811.211.711.47.812.913.811.211.413.36.111.03.38.57.010.55.39.54.99.512.812.412.010.910.110.911.310.310.39.19.09.19.59.911.09.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value9.88.96.87.00.99.75.82.65.19.35.19.7109.3-42.21213108.6114.510-3.08.45.3126.0143.47.0039.2968.9528.2217.76.5078.0158.4697.7865.87.3877.1127.1876.3387.318.4146.901
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.01.61.80.32.31.30.61.12.11.12.12.22.2-9.82.93.22.52.12.91.12.6-0.71.91.12.71.22.60.82.93.63.53.23.12.73.23.33.02.32.82.62.72.62.93.32.7

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value158.53.1108.46.29.66.27.95.8148.0164.0126.2244.86.57.0125.1136.21013-11.35.95.5255.5754.0188.9496.8765.6576.1221.2863.509109.2026.8667.088.7524.4739.118.1893.128
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.31.90.72.82.41.52.21.41.71.33.31.73.60.92.81.55.91.21.61.82.81.23.21.42.23.0-2.21.11.32.31.63.52.72.32.50.51.44.13.72.62.63.31.83.63.21.2

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value9.19.910108.19.39.91110111211111010101011131313141514151516168.90.85.863-0.8-0.8-0.85.621-0.8-0.8-0.85.654-0.8-0.8-0.85.736-0.9-0.7
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.22.52.62.32.22.22.42.42.62.72.52.52.52.52.52.52.93.23.43.33.43.63.23.43.43.22.92.10.32.3-0.3-0.3-0.32.3-0.3-0.3-0.32.2-0.3-0.3-0.32.4-0.4-0.3

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-302013-03-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-042010-04-04
Value14147.18.08.910111012138.96.91011161216101519171.4410.0590.4181.5390.1720.0541.5790.1580.2371.5830.0510.0921.4780.1
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.11.82.22.12.42.42.52.72.82.11.62.62.84.13.04.02.33.44.43.10.30.00.20.60.10.00.60.10.10.60.00.00.60.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value41393128143829382639434144397541433436412133172926352137181522212117181718191918181915161515161815
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.28.87.27.34.09.26.68.55.78.99.69.09.59.317.59.810.48.59.110.45.08.34.06.55.77.74.16.84.46.48.88.68.66.77.57.27.47.87.87.07.17.86.06.16.06.56.77.46.1

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value1100000.01100000.0900000.01000000.0500000.01000000.0700000.01100000.01000000.0900000.0900000.01000000.01100000.01200000.0900000.01200000.0800000.01000000.0800000.0900000.01100000.0900000.0800000.01100000.0900000.0900000.0700000.0800000.0900000.0664000.0969000.0686000.0619000.0848000.0-500000.0553000.0524000.0576000.0-400000.0656000.0743000.0909000.0-800000.0767000.0674000.0733000.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.30.10.20.20.20.20.20.20.20.20.30.20.30.20.20.20.20.30.20.20.20.20.20.10.10.20.30.40.30.20.3-0.20.20.20.2-0.20.30.30.3-0.30.30.30.3

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value-11400000.0-9400000.0-15900000.0-12700000.0-12600000.0-8700000.0-12700000.0-12600000.0-13300000.0-12800000.0-13800000.0-16200000.0-8400000.0-13400000.0-12000000.0-12200000.0-11400000.0-16200000.0-10900000.0-14000000.0-13300000.0-12400000.0-23400000.0-11700000.0-20500000.0-12200000.0-15300000.0-15100000.0-15000000.0-310000.0-570000.0-1234000.0-1472000.0168000.0-979000.0-650000.0-768000.0-598000.0701000.0-1663000.0-799000.0-837000.0263000.0-177000.0535000.0-49000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.5-2.1-3.7-3.3-3.5-2.1-2.9-2.8-2.9-2.9-3.1-3.5-1.8-3.1-2.8-2.9-2.8-4.0-2.7-3.5-3.1-3.0-5.4-2.6-4.4-2.7-3.0-2.8-3.6-0.1-0.2-0.5-0.60.1-0.4-0.3-0.3-0.20.3-0.6-0.3-0.30.1-0.10.2-0.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value63585448275747534562626862624566686156673957374952594266352333323232272527293026272525252422242723
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.013.012.612.57.613.810.811.99.814.213.914.713.514.510.615.716.515.214.116.89.314.08.811.111.413.28.312.38.59.613.112.912.912.610.810.511.111.612.010.511.010.09.79.39.49.410.010.89.1

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Operating
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-01
Value-2.3-4.1-2.1-1.8-1.1-1.7-3.2-0.8-0.9-1.9
Percentage of OperatingIncomeLoss-3.6-7.0-4.3-6.6-1.9-3.2-7.0-1.3-1.3-3.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.9-0.5-0.5-0.3-0.4-0.7-0.2-0.2-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value666263523758556048626269656450697064617041604353576547724430363433
Percentage of OperatingIncomeLoss104.2107.0117.2107.4137.1101.9116.4113.6107.0101.3100.2101.8104.6103.2110.7103.9102.8103.9109.6105.1105.6105.2114.3107.8108.1108.7110.3109.1125.4130.2107.8105.0104.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.613.914.813.410.414.112.613.510.514.313.915.014.115.011.716.417.015.815.417.79.814.810.011.912.314.49.113.410.712.614.113.513.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments14.613.90.013.410.414.10.013.510.514.30.015.014.115.00.016.417.015.80.017.79.814.80.011.912.314.40.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, mtx:EnergyServices


Operating
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value0.60.01.43.22.52.00.92.41.21.10.71.51.32.30.81.71.12.6-29.5-0.1-13.7-7.9-12.25.80.2105.90.00.00.0
Percentage of OperatingIncomeLoss1.10.05.15.55.23.72.03.91.91.61.12.42.83.41.22.81.93.9-74.7-0.2-36.3-15.8-23.19.70.515.316.50.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.40.80.60.40.20.50.30.20.20.30.30.50.20.40.30.7-6.9-0.0-3.2-1.8-2.61.30.01.91.40.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:EnergyServices0.00.07.912.70.07.83.511.80.05.73.67.90.012.14.59.10.013.1-147.5-0.40.0-19.3-24.79.90.011.912.10.00.00.0

us-gaap:OperatingSegments, mtx:PerformanceMaterials


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value342930282124232620262931292628303228262224232322252318184.30.00.00.0
Percentage of OperatingIncomeLoss54.550.755.658.177.241.848.650.345.542.446.946.647.141.961.545.847.046.747.434.060.841.363.445.548.339.742.328.012.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.66.67.07.35.95.85.36.04.56.06.56.96.46.16.57.27.87.16.75.75.65.85.65.05.55.33.53.41.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:PerformanceMaterials14.612.90.014.812.112.90.013.09.613.20.014.513.814.00.016.217.917.00.019.218.720.00.017.919.818.60.013.85.70.00.00.0

us-gaap:OperatingSegments, mtx:Refractories


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value1112117.35.91110107.11210111012109.9109.29.810106.83.37.98.48.3149.7109.2128.4
Percentage of OperatingIncomeLoss18.420.420.415.121.719.421.819.115.619.517.316.916.420.422.314.815.314.917.315.026.111.88.815.815.913.933.314.528.239.036.125.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.72.61.91.72.72.42.31.52.82.42.52.23.02.42.32.52.32.42.52.41.70.81.81.81.82.81.82.43.84.73.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:Refractories15.716.20.012.310.616.20.013.99.216.40.014.512.917.00.014.415.213.10.015.913.99.80.010.211.011.20.010.711.010.90.09.7

us-gaap:OperatingSegments, mtx:SpecialtyMinerals


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value202121169.0201921202221252524112626242127272525252723242623212426
Percentage of OperatingIncomeLoss31.435.940.234.233.135.240.740.644.035.534.036.740.038.524.139.839.339.538.241.369.944.667.950.151.338.657.338.966.891.271.679.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.75.14.32.54.94.44.84.35.04.75.45.45.62.56.36.56.05.47.06.56.36.05.55.85.14.74.85.78.89.310.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:SpecialtyMinerals14.014.30.013.38.214.80.015.213.815.20.017.116.616.10.018.018.316.70.018.918.316.50.016.017.315.00.016.014.213.50.015.5

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

mtx:PerformanceMaterials


Operating
Period End2020-12-312020-09-272020-06-282020-03-292016-12-312016-10-022016-07-032016-04-03
Value3028222729303328
Percentage of OperatingIncomeLoss56.758.182.447.352.044.984.349.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.27.36.36.57.37.67.86.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:PerformanceMaterials15.314.812.914.721.725.325.923.7

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-07-042020-06-28
Value-1000000.0-800000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.2

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-01
Value2.0-28.9396.67.9-43.112-23.1-18.7-0.4-5.5-23.1-54.515108.01313-42.21.2-9.09.9-10.5-35.8-2.4-27.8-29.5-27.73.62.087-1.4927.57-7.826-14.785-0.1168.562-16.066
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-6.49.11.72.2-10.32.8-5.1-4.0-0.1-1.2-5.0-11.73.52.51.93.23.2-10.50.3-2.12.4-2.4-7.9-0.5-6.1-5.7-5.10.90.9-0.63.0-3.0-5.9-0.03.4-6.3

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value5.3-21.54.56.012-39.2-11.0-17.0-20.32.44.7-18.9-53.918-0.89.11414-47.32.8-8.511-7.8-34.2-0.9-26.4-63.1-26.94.52.8279.4-5.9
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.2-4.81.01.53.5-9.4-2.5-3.8-4.40.51.1-4.1-11.64.3-0.22.13.43.5-11.80.7-2.02.7-1.8-7.6-0.2-5.8-12.2-4.91.11.110.63.7-2.3

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-31
Value4.32.53.85.22.11.61.71.6
Percentage of OtherComprehensiveIncomeLossNetOfTax81.1-11.663.341.9-5.4-9.4-8.466.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.61.01.50.50.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-31
Value-1.04.9-4.3-0.71.84.5-3.31.3
Percentage of OtherComprehensiveIncomeLossNetOfTax-18.9-22.8-71.7-5.6-4.6-26.516.354.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.21.1-1.1-0.20.41.0-0.70.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value5.0-21.03.15.511-37.8-11.4-16.2-20.11.95.1-18.6-52.318-1.38.91313-46.43.4-8.211-7.6-33.2-0.7-26.5-62.6-26.74.73.0279.5
Percentage of OtherComprehensiveIncomeLossNetOfTax94.397.768.991.791.196.4103.695.399.079.2108.598.497.097.3162.597.897.196.598.1121.496.598.297.497.177.8100.499.299.3104.4107.1101.1101.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-4.60.71.43.2-9.1-2.6-3.6-4.30.41.1-4.0-11.34.2-0.32.13.33.4-11.60.9-1.92.7-1.8-7.4-0.2-5.8-12.1-4.91.11.210.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-31
Value1.7-28.46.06.8-41.7-22.3-18.5-1.0
Percentage of OtherComprehensiveIncomeLossNetOfTax32.1132.1100.054.8106.4131.291.1-41.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-6.31.51.9-10.0-5.0-4.0-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Other
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value0.3-0.50.51.1-1.4-0.8-0.20.5-0.4-0.3-1.60.50.50.10.30.6-0.9-0.5-0.40.2-0.2-1.0-0.20.1-0.5-0.2-0.1-0.2-0.3-0.1
Percentage of OtherComprehensiveIncomeLossNetOfTax5.72.38.38.93.64.71.020.8-8.51.63.02.7-62.51.12.14.21.9-17.94.71.82.62.922.2-0.40.80.7-2.2-7.1-1.1-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.10.10.3-0.3-0.2-0.00.1-0.1-0.1-0.30.10.10.00.10.1-0.2-0.1-0.10.0-0.0-0.2-0.00.0-0.1-0.0-0.0-0.1-0.1-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value-100000.0500000.0-4200000.0-1500000.0-200000.0600000.0-2800000.0-1600000.0-2400000.0-1400000.0-1000000.0-900000.03100000.0-2700000.0-1100000.0-1700000.0-1200000.0-500000.02100000.0-600000.0600000.01700000.0-8000000.02800000.0-200000.03200000.01300000.0900000.0-300000.0-200000.01314000.0-1100000.0-1400000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.1-1.0-0.4-0.10.1-0.6-0.4-0.5-0.3-0.2-0.20.7-0.6-0.3-0.4-0.3-0.10.5-0.20.10.4-1.90.6-0.00.70.30.2-0.1-0.10.5-0.4-0.5

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value43413229143929392740444245417642433537422234173027362237191623221719181920182016171616171916
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.49.17.47.54.29.56.78.76.09.19.89.29.79.517.810.110.68.89.310.65.28.54.16.75.97.94.37.04.66.79.28.96.97.87.57.78.07.28.06.26.46.46.97.07.76.4

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value1.11.11.00.51.01.11.00.90.91.01.11.20.91.20.81.00.80.91.10.90.81.10.90.90.70.90.90.60.9210.70.60.90.4220.60.50.60.3330.7
Percentage of ProfitLoss2.62.73.43.42.52.83.62.22.02.32.42.91.22.81.82.82.12.14.92.64.53.63.32.53.22.44.63.73.93.13.44.62.33.12.53.21.74.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.30.10.20.20.20.20.20.20.20.30.20.30.20.20.20.20.30.20.20.20.20.20.10.20.20.20.40.30.20.40.20.20.20.20.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value4139281438382639434144397541433436412133162926352137181522211718171819181915
Percentage of ProfitLoss97.497.396.696.697.597.296.497.898.097.797.697.198.897.298.297.297.997.995.197.495.596.796.797.596.897.995.495.896.196.796.495.997.397.597.396.797.896.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.28.87.34.09.28.55.78.99.69.09.59.317.59.810.48.59.110.45.08.33.96.55.77.74.16.84.46.48.88.66.77.57.37.57.87.07.86.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value4.95.04.94.85.15.15.45.24.94.85.25.06.46.15.95.96.15.85.95.96.15.95.86.25.85.96.46.66.35.0945.1075.3024.8264.8184.9945.1055.0265.0474.8414.7234.8974.8694.894.6354.9285.124
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.11.21.41.21.21.21.11.11.21.11.41.41.41.41.51.41.51.51.41.41.31.41.31.31.21.21.52.12.02.11.91.92.02.02.02.01.91.81.81.92.01.91.92.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value455452431388357417440449463437447464464431432424414405401399427410429451463453516543421244256254254256251244250253251257254251262268262243249255253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-29
Value455452431388357417440449463437447464464431432424414405401399427410430451463453
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, mtx:EnergyServices


Revenue
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value1613172523252520201919192119171820192025334049587685480.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.34.65.15.04.76.37.89.110.612.914.715.711.50.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.34.65.15.04.76.37.89.110.612.914.715.711.50.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:EnergyServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OperatingSegments, mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value238230202190173186201207215199206219214187195188180169319119128119131126129127141135750.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.351.046.849.148.744.645.846.146.445.546.247.346.243.445.344.543.542.079.529.930.129.030.528.027.928.227.424.918.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.351.046.849.148.744.645.846.146.445.546.247.346.243.445.344.543.542.079.529.930.129.030.528.027.928.227.424.918.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OperatingSegments, mtx:Refractories


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value747373595569737377737779797571686870686373696877767392909184898688
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.317.115.315.616.516.716.316.716.917.417.017.117.516.516.216.617.316.915.917.316.915.917.216.516.318.016.621.834.734.834.134.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.317.115.315.616.516.716.316.716.917.417.017.117.516.516.216.617.316.915.917.316.915.917.216.516.318.016.621.834.734.834.134.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:Refractories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value142147138125109137141143145144142146150149143147147146138147150155157156156154159163167159167167168
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.332.732.232.230.732.832.231.831.333.031.831.532.534.733.334.835.536.134.436.935.337.936.734.733.834.030.930.039.965.365.265.965.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.332.732.232.230.732.832.231.831.333.031.831.532.534.733.334.835.536.134.436.935.337.936.734.733.834.030.930.039.965.365.165.965.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

mtx:BuildingMaterials


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-03
Value1513131615151818182019201717161920
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.03.74.03.53.53.93.94.44.84.74.94.34.34.24.65.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.03.74.03.53.53.93.94.44.84.74.94.34.34.24.65.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:BuildingMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:EnvironmentalProducts


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value3926371115162625121521191014242613142122111834170.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.85.710.52.83.63.65.75.42.93.75.14.72.63.66.26.23.33.44.84.82.53.76.34.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.85.710.52.83.63.65.75.42.93.75.14.72.63.66.26.23.33.44.84.82.53.76.34.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:EnvironmentalProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

mtx:GroundCalciumCarbonate


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value25242022222023252220222321182122202020211817192017161819171516181715171817141618
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.35.85.45.14.55.05.45.24.75.35.65.34.65.45.35.04.74.64.64.13.33.64.87.06.37.47.76.86.16.77.46.86.16.67.06.55.96.77.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.35.85.45.14.55.05.45.24.75.35.65.34.65.45.35.04.74.64.64.13.33.64.87.06.37.47.76.86.16.77.46.86.16.67.06.55.96.77.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:GroundCalciumCarbonate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:HouseholdPersonalCareAndSpecialtyProducts


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value102109879674697158484642394139424445464341414142230.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.524.224.623.017.115.615.512.611.310.710.09.610.19.910.510.311.010.79.59.09.28.17.95.60.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.524.224.623.017.115.615.512.611.310.710.09.610.19.910.510.311.010.79.59.09.28.17.95.60.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:HouseholdPersonalCareAndSpecialtyProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

mtx:Metalcasting


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value8081526173837788797873756666636860666371657270390.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.718.114.814.816.718.616.819.118.418.117.318.316.416.715.815.914.615.414.115.514.414.012.99.40.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.718.114.814.816.718.616.819.118.418.117.318.316.416.715.815.914.615.414.115.514.414.012.99.40.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:Metalcasting100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

mtx:MetallurgicalProducts


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value16158.813111212121313121213121215151516161520202321212021211918202020202119161819
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.32.53.22.72.82.72.83.03.22.93.13.33.13.13.53.93.73.73.63.44.03.85.58.88.38.18.38.48.17.58.17.98.17.67.97.56.87.37.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.32.53.22.72.82.72.83.03.22.93.13.33.13.13.53.93.73.73.63.44.03.85.58.88.38.18.38.48.17.58.17.98.17.67.97.56.87.37.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:MetallurgicalProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:PaperPcc


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value85896585919393949795969293929597103107106104105113113115112122119118121118120119121117126123129121121123
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.819.818.320.420.921.020.120.322.522.122.722.323.123.023.922.725.225.023.522.623.221.920.927.446.247.646.946.148.348.648.247.047.346.848.246.149.249.748.748.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.819.818.320.420.921.020.120.322.522.122.722.323.123.023.922.725.225.023.522.623.221.920.927.446.247.546.946.148.348.648.247.047.346.848.246.149.249.748.748.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:PaperPcc100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:RefractoryProducts


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value58584755626566666257565656555158535260595872696863686667626366656971717569686568
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.713.013.213.414.214.614.414.414.413.313.313.514.013.912.813.813.012.213.412.812.914.112.816.325.826.526.126.224.826.026.425.826.928.327.128.126.528.126.226.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.713.013.213.414.214.614.414.414.413.313.313.514.013.912.813.813.012.213.412.812.914.112.816.325.826.526.126.224.826.026.425.826.928.327.128.126.528.126.226.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:RefractoryProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:SpecialtyPcc


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value18201417181516171715161717141617161615161615161716161617161616171615161615131515
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.54.24.24.13.53.63.73.93.53.94.24.23.54.14.04.13.83.53.53.63.03.04.36.76.46.56.76.76.66.66.76.46.16.16.25.95.76.25.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.54.24.24.13.53.63.73.93.53.94.24.23.54.14.04.13.83.53.53.63.03.04.36.76.46.56.76.76.66.66.76.46.16.16.25.95.76.25.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:SpecialtyPcc100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:Talc


Revenue
Period End2021-07-042021-04-042020-06-282020-03-292019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value12138.8111212131313121214141313131514131413131314131212131211111312111112119.91211
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.83.02.52.92.92.82.93.03.03.03.03.43.53.23.53.23.73.33.13.13.02.72.53.45.54.95.05.14.94.54.85.24.74.64.34.74.34.15.04.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.83.02.52.92.92.82.93.03.03.03.03.43.53.23.53.23.73.33.13.13.02.72.53.45.54.95.05.14.94.54.85.24.74.64.34.74.34.15.04.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:Talc100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product


Revenue
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-02
Value415375339392416423438417427444445412411405396
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax96.196.695.094.094.694.394.495.495.595.995.895.695.195.595.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax96.196.695.094.094.694.394.495.495.595.995.895.695.195.595.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service


Revenue
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-02
Value161317252325252020191919211917
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

mtx:BuildingMaterials, mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value151312131316171719151518181820192017
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.02.93.53.74.04.03.84.13.53.53.93.94.44.84.74.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.02.93.53.74.04.03.84.13.53.53.93.94.44.84.74.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:BuildingMaterials mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:EnvironmentalProducts, mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value392627161911142729151626251215211910
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.85.76.34.45.62.83.36.06.33.63.65.75.42.93.75.14.72.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.85.76.34.45.62.83.36.06.33.63.65.75.42.93.75.14.72.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:EnvironmentalProducts mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:GroundCalciumCarbonate, mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value252422232022212324222023252220222321
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.35.36.05.85.44.85.15.35.14.55.05.45.24.75.35.65.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.35.36.05.85.44.85.15.35.14.55.05.45.24.75.35.65.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:GroundCalciumCarbonate mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:HouseholdPersonalCareAndSpecialtyProducts, mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value102109102938796969469746971584846423941
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.524.223.724.224.623.021.920.914.917.115.615.512.611.310.710.09.610.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.524.223.724.224.623.021.920.914.917.115.615.512.611.310.710.09.610.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:HouseholdPersonalCareAndSpecialtyProducts mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:Metalcasting, mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value808177665261736975738377887978737566
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.718.117.917.114.814.816.615.416.316.718.616.819.118.418.117.318.316.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.718.117.917.114.814.816.615.416.316.718.616.819.118.418.117.318.316.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:Metalcasting mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:MetallurgicalProducts, mtx:Refractories


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value161513108.813121216111212121313121213
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.33.12.72.53.22.92.73.62.72.82.72.83.03.22.93.13.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.63.33.12.72.53.22.92.73.62.72.82.72.83.03.22.93.13.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:MetallurgicalProducts mtx:Refractories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:PaperPcc, mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value858983746585939090919393949795969293
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.819.819.319.218.320.421.120.119.420.921.020.120.322.522.122.722.323.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.819.819.319.218.320.421.120.119.420.921.020.120.322.522.122.722.323.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:PaperPcc mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:RefractoryProducts, mtx:Refractories


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value585860484755606161626566666257565656
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.713.014.012.613.213.413.713.613.214.214.614.414.414.413.313.313.514.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.713.014.012.613.213.413.713.613.214.214.614.414.414.413.313.313.514.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:RefractoryProducts mtx:Refractories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:SpecialtyPcc, mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value182019171417161717181516171715161717
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.54.54.54.24.23.63.93.74.13.53.63.73.93.53.94.24.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.54.54.54.24.23.63.93.74.13.53.63.73.93.53.94.24.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:SpecialtyPcc mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:Talc, mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value121313108.811111212121213131312121414
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.83.03.02.62.52.92.62.72.82.92.82.93.03.03.03.03.43.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.83.03.02.62.52.92.62.72.82.92.82.93.03.03.03.03.43.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:Talc mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

mtx:EnergyServices


Revenue
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-30
Value1613172523252520201919192119171820192025334049587685480.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.34.65.15.04.76.37.89.110.612.914.715.711.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.45.06.05.45.75.64.64.54.14.24.44.94.54.34.65.15.04.76.37.89.110.612.914.715.711.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:EnergyServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

mtx:PerformanceMaterials


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-30
Value238230202190173186201207215199206219214187195188180169135119128119131126129127141135750.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.351.046.849.148.744.645.846.146.445.546.247.346.243.445.344.543.542.033.829.930.129.030.528.027.928.227.424.918.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.351.046.849.148.744.645.846.146.445.546.247.346.243.445.344.543.542.033.829.930.129.030.528.027.928.227.424.918.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

mtx:Refractories


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value74737359556973737773777979757168687068637369687776739290918489868688838384858589899191968984838781
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.317.115.315.616.516.716.316.716.917.417.017.117.516.516.216.617.316.915.917.316.915.917.216.516.318.016.621.834.734.934.134.134.533.334.233.833.834.234.835.136.534.736.034.034.833.534.232.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.317.115.315.616.516.716.316.716.917.417.017.117.516.516.216.617.316.915.917.316.915.917.216.516.318.016.621.834.734.934.134.134.533.334.233.833.834.234.835.136.534.736.034.034.833.534.232.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:Refractories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:SpecialtyMinerals


Revenue
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value142147138125109137141143145144142146150149143147147146138147150155157156156154159163167159167167167168167160165168165167165159171171173158166168172
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.332.732.232.230.732.832.231.831.333.031.831.532.534.733.334.835.536.134.436.935.337.936.734.733.834.030.930.039.865.365.165.965.965.566.765.866.166.265.865.264.963.565.364.066.065.266.565.867.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.332.732.232.230.732.832.231.831.333.031.831.532.534.733.334.835.536.134.436.935.337.936.734.733.834.030.930.039.865.365.165.965.965.566.765.866.166.265.865.264.963.565.364.066.065.266.565.867.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value46484942414349464842434545444845444445424546424746455059462122212122222221222222232322222222
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.210.611.410.811.710.411.210.410.49.89.79.89.710.311.210.710.611.011.310.610.611.49.910.610.010.09.711.011.08.88.98.68.49.19.28.88.68.99.08.68.88.89.49.08.88.8

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value32533213320932143056306931123125314931633087311231283006297029832917289628632938294429812980314832013159322632733300123712171226121312111211120911851186116411441175114311161072
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

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1398148434161114233238
Percentage of Assets4.42.61.61.51.42.13.519.219.7
Percentage of Assets4.42.61.61.51.42.13.519.219.7
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3069303130382927282129183112983972
Percentage of Assets95.697.498.498.598.697.996.580.880.3
Percentage of Assets95.697.498.498.598.697.996.580.880.3
Percentage of Assets us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, mtx:EnergyServices


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1071211101101041542280.0
Percentage of Assets3.33.93.63.73.75.27.10.0
Percentage of Assets3.33.93.63.73.75.27.10.0
Percentage of Assets us-gaap:OperatingSegments mtx:EnergyServices100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OperatingSegments, mtx:PerformanceMaterials


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value21112091211919891606162615840.0
Percentage of Assets65.867.268.767.056.154.649.10.0
Percentage of Assets65.867.268.767.056.154.649.10.0
Percentage of Assets us-gaap:OperatingSegments mtx:PerformanceMaterials100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OperatingSegments, mtx:Refractories


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value290293296307283292357378355
Percentage of Assets9.19.49.610.39.99.811.131.129.4
Percentage of Assets9.19.49.610.39.99.811.131.129.4
Percentage of Assets us-gaap:OperatingSegments mtx:Refractories100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtx:SpecialtyMinerals


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value559525511519491505494605617
Percentage of Assets17.416.916.617.517.217.015.349.750.9
Percentage of Assets17.416.916.617.517.217.015.349.750.9
Percentage of Assets us-gaap:OperatingSegments mtx:SpecialtyMinerals100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value17141710171017401616165716781692172717361701177018111674169117811778181418321897195120022042222322742260233723482386342343394398398397380387388396352353333333324
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.753.253.354.152.954.053.954.154.954.955.156.957.955.756.959.761.062.764.064.666.367.168.570.671.071.572.571.772.327.728.232.232.832.932.831.532.732.834.130.830.129.229.930.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value32533213320932143056306931123125314931633087311231283006297029832917289628632938294429812980314832013159322632733300123712171226121312111211120911851186116411441175114311161072
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 End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value14991464146014381406137914021402139013931353131012881302125111761113105610061013964951910897900872863900889867847808792789790802772770741763791781755724
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.145.645.544.746.045.045.144.944.244.143.842.141.243.342.139.438.236.535.234.532.831.930.628.528.127.626.727.526.970.169.665.965.365.265.366.465.264.963.766.767.468.367.767.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-108.1-112.4-114.9-85.0-88.8-94.0-96.1-75.2-76.8-78.5-69.7-78.1-82.8-84.6-86.5-74.3-75.5-76.8-78.0-71.0-72.2-74.8
Percentage of StockholdersEquity-7.2-7.7-7.9-5.9-6.3-6.8-6.9-5.4-5.5-5.6-5.1-6.0-6.4-6.5-6.9-6.3-6.8-7.3-7.7-7.0-7.5-8.2
Percentage of Assets-3.3-3.5-3.6-2.6-2.9-3.1-3.1-2.4-2.4-2.5-2.3-2.5-2.6-2.8-2.9-2.5-2.6-2.7-2.7-2.4-2.5-2.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012017-12-31
Value1.32.3-2.62.77.07.75.98.13.66.96.14.44.94.5
Percentage of StockholdersEquity0.10.2-0.20.20.50.60.40.60.30.50.50.30.40.4
Percentage of Assets0.00.1-0.10.10.20.30.20.30.10.20.20.10.20.2
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-324.3-329.3-308.3-311.4-316.9-328.2-290.4-279.0-262.8-242.7-233.7-238.8-220.2-167.9-186.1-184.8-193.7-207.3-221.1-174.7-178.1-180.9
Percentage of StockholdersEquity-21.6-22.5-21.1-21.7-22.5-23.8-20.7-19.9-18.9-17.4-17.3-18.2-17.1-12.9-14.9-15.7-17.4-19.6-22.0-17.2-18.5-19.9
Percentage of Assets-10.0-10.2-9.6-9.7-10.4-10.7-9.3-8.9-8.3-7.7-7.6-7.7-7.0-5.6-6.3-6.2-6.6-7.2-7.7-5.9-6.0-6.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-217.5-219.2-190.8-229.1-235.1-241.9-200.2-211.9-189.6-171.1-170.1-165.1-142.3-89.4-104.1-114.5-122.1-134.8-147.3-106.0-107.7-108.7
Percentage of StockholdersEquity-14.5-15.0-13.1-15.9-16.7-17.5-14.3-15.1-13.6-12.3-12.6-12.6-11.0-6.9-8.3-9.7-11.0-12.8-14.6-10.5-11.2-11.9
Percentage of Assets-6.7-6.8-5.9-7.1-7.7-7.9-6.4-6.8-6.0-5.4-5.5-5.3-4.5-3.0-3.5-3.8-4.2-4.7-5.1-3.6-3.7-3.6
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value1085104410331047884897919920931903876903899884852860804786751810806808803878901869924970987834815803785774764770748743720718739706675600
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 Assets33.432.532.232.628.929.229.529.429.628.628.429.028.729.428.728.927.627.126.227.627.427.127.027.928.227.528.729.729.967.566.965.564.764.063.163.763.162.761.862.862.961.860.556.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-042009-12-312008-12-312007-12-31
Value403371367379232214241213214202208206203223212211177168188199201211229224224193249202191493490469458454454449421415395382396380367361336325310181128
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 Assets12.411.611.511.87.67.07.86.86.86.46.86.66.57.47.17.16.15.86.66.86.87.17.77.17.06.17.76.25.839.840.338.337.737.537.537.135.635.033.933.433.733.333.00.00.00.029.00.00.0

Short Term Investments

us-gaap:ShortTermInvestments

us-gaap:ShortTermInvestments


Short
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value5.34.34.12.85.43.81.61.55.24.33.84.32.93.92.72.84.83.82.05.14.03.52.62.92.92.10.8171615151615151412192018161618168.94
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.10.10.10.20.10.10.00.20.10.10.10.10.10.10.10.20.10.10.20.10.10.10.10.10.10.00.50.51.31.31.31.31.31.21.11.61.71.61.51.41.61.50.8

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value368377369363336382376403411406387410420398383389378380341363374365348385406414412443461217204207205197193194196198194197200193181173
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.311.711.511.311.012.512.112.913.112.812.513.213.413.312.913.013.013.111.912.412.712.311.712.312.713.112.813.614.017.616.816.917.016.316.016.116.616.716.717.317.116.916.216.2

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value261247248255269252253256258254239243235221219221211196186209197197194203209207211233243918990898884939089909797898682
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 Assets8.17.77.77.98.88.28.18.28.28.07.77.87.57.47.47.47.36.86.57.16.76.66.56.56.56.66.67.17.47.47.37.47.37.37.07.77.67.57.88.58.37.87.77.7

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-292014-12-312013-12-31
Value9.2115.24.94.43.123245.9
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.20.20.20.10.80.70.5

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value4644444739444644413637383737353630373232282928605949727517152016181821202021232823
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.41.51.31.51.51.41.31.11.21.21.21.21.21.21.11.31.11.11.01.00.91.91.81.52.22.31.41.31.61.41.51.51.71.71.71.92.12.42.1

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2043206321292037203420982165372386386404432
Percentage of NoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.766.369.068.671.170.467.130.631.933.236.240.3

us-gaap:NoncurrentAssets us-gaap:ConsolidationItems, us-gaap:StatementGeographical

srt:ReportableGeographicalComponents, country:US


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value17231742176717741794
Percentage of NoncurrentAssets84.384.483.087.188.2
Percentage of Assets53.756.057.359.762.7
Percentage of Assets srt:ReportableGeographicalComponents country:US0.00.00.00.00.0

srt:ReportableGeographicalComponents, mtx:CanadaLatinAmerica


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1113131414
Percentage of NoncurrentAssets0.60.60.60.70.7
Percentage of Assets0.40.40.40.50.5
Percentage of Assets srt:ReportableGeographicalComponents mtx:CanadaLatinAmerica0.00.00.00.00.0

srt:ReportableGeographicalComponents, mtx:EuropeAfrica


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value18219022511598
Percentage of NoncurrentAssets8.99.210.65.74.8
Percentage of Assets5.76.17.33.93.4
Percentage of Assets srt:ReportableGeographicalComponents mtx:EuropeAfrica0.00.00.00.00.0

srt:ReportableGeographicalComponents, srt:Asia


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value126117123132127
Percentage of NoncurrentAssets6.25.75.86.56.3
Percentage of Assets3.93.84.04.44.4
Percentage of Assets srt:ReportableGeographicalComponents srt:Asia0.00.00.00.00.0

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

mtx:TotalInternational


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value320320361262240268299137150146164178
Percentage of NoncurrentAssets15.715.617.012.911.812.813.936.939.037.940.641.3
Percentage of Assets10.010.311.78.88.49.09.311.312.512.614.716.7
Percentage of Assets mtx:TotalInternational0.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-03-292014-12-312013-12-312012-12-312011-12-312010-12-31
Value22832264227622282217223422572241224622692256225422542218221921892169214121412178216421932167215321741282126112481238
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.270.570.969.372.672.872.571.771.371.773.172.472.173.874.773.474.473.974.874.173.573.672.768.267.4105.3104.2107.2111.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

mtx:FurnitureAndFixturesAndOther


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
Value13814413413212320915388859195
Percentage of PropertyPlantAndEquipmentGross6.16.46.06.05.89.77.06.96.87.37.7
Percentage of Assets4.34.64.44.54.37.04.77.37.17.98.5
Percentage of Assets mtx:FurnitureAndFixturesAndOther0.00.00.00.00.00.00.00.00.00.00.0

mtx:MineralRightsAndReserves


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value56557158254554755357539
Percentage of PropertyPlantAndEquipmentGross24.825.325.824.625.625.626.53.1
Percentage of Assets17.618.318.918.419.118.617.83.3
Percentage of Assets mtx:MineralRightsAndReserves0.00.00.00.00.00.00.00.0

us-gaap:Building


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
Value225218219199195179198145145147144
Percentage of PropertyPlantAndEquipmentGross9.99.79.79.09.18.39.111.411.511.811.7
Percentage of Assets7.07.07.16.76.86.06.112.012.012.612.9
Percentage of Assets us-gaap:Building0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4135364938538028273113
Percentage of PropertyPlantAndEquipmentGross1.81.61.62.21.82.53.72.22.22.51.1
Percentage of Assets1.31.11.21.71.31.82.52.32.32.71.2
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


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
Value5047474442394424262727
Percentage of PropertyPlantAndEquipmentGross2.22.12.12.02.01.82.11.92.12.22.2
Percentage of Assets1.61.51.51.51.51.31.42.02.22.32.4
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MachineryAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1254124112351247119311301121956937911918
Percentage of PropertyPlantAndEquipmentGross55.155.054.856.255.752.251.674.674.373.074.2
Percentage of Assets39.139.940.042.041.737.934.878.577.478.382.3
Percentage of Assets us-gaap:MachineryAndEquipment0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-31
Value12491233123712011194119912041182117711671153114811321152115811301115108910891107109510911063101510149789929961004988976967949943-944.283933945948-930.515930943925905
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.438.438.637.439.139.138.737.837.436.937.436.936.238.339.037.938.237.638.137.737.236.635.732.331.731.030.730.430.479.980.278.978.377.9-78.077.279.879.9-79.981.380.381.081.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value10331031103910271023103410521058106911011102110611211065106110591054105110511071106911021104112511561175118212191222306306307308312317318314316318322329328332359
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 Assets31.832.132.432.033.533.733.833.933.934.835.735.535.935.535.735.536.236.336.736.536.337.037.135.836.137.236.637.237.124.825.125.125.425.826.226.426.526.727.328.228.128.829.833.5

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value806806808806805805807806807812812808810779779779779778778780780781781789781768770767769646464646565656565646567676768
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 Assets24.825.125.225.126.426.225.925.825.725.726.326.025.925.926.226.126.726.927.226.626.526.226.225.124.424.323.923.423.35.25.35.35.35.45.45.45.55.55.65.75.75.96.06.4

us-gaap:Goodwill us-gaap:StatementBusinessSegments

mtx:PerformanceMaterials


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value7527517557205445444530.00.0
Percentage of Goodwill93.193.093.092.569.969.758.80.00.0
Percentage of Assets23.424.124.524.319.018.314.00.00.0
Percentage of Assets mtx:PerformanceMaterials0.00.00.00.00.00.00.00.00.0

mtx:Refractories


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value4343444545474949505050515151515150515353
Percentage of Goodwill5.45.45.45.95.96.06.477.677.878.278.879.178.578.578.778.778.778.878.879.4
Percentage of Assets1.41.41.41.51.61.61.54.04.14.14.24.34.34.34.34.44.44.54.54.8
Percentage of Assets mtx:Refractories0.00.00.00.00.00.00.00.013.30.00.00.014.50.00.00.014.30.00.015.7

mtx:SpecialtyMinerals


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value1212121212131314141413131414131413131413
Percentage of Goodwill1.61.51.51.61.61.71.822.422.221.821.220.921.421.421.321.321.321.321.120.5
Percentage of Assets0.40.40.40.40.40.40.41.21.21.11.11.11.21.21.21.21.21.21.21.2
Percentage of Assets mtx:SpecialtyMinerals0.00.00.00.00.00.00.00.02.40.00.00.02.30.00.00.02.30.00.02.4

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value1901921951971982002032042072112142102121941961982002022042062082102122142172102122172193.0
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.96.06.16.16.56.56.56.66.66.76.96.86.86.56.66.76.97.07.17.07.17.17.16.86.86.76.66.66.70.2

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-292019-06-302019-03-31
Value5044444747
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0
Percentage of Assets1.61.41.41.51.5

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value11311410611312110710711210810955585857558578525070797947140144798199100313150545863545760613738404043
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 Assets3.53.63.33.54.03.53.43.63.43.51.81.91.91.91.92.92.71.81.82.42.72.61.64.54.52.52.53.03.02.62.64.14.54.85.24.54.85.15.33.33.33.53.64.1

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value1771671481401391581631761881781691841951771791811641471441551561591521761831691701842041099410511010998102107106103105107908074
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 Assets5.55.24.64.44.65.15.25.66.05.65.55.96.35.96.06.15.65.15.15.35.35.45.15.65.75.35.35.66.28.97.88.69.19.18.18.59.09.08.99.39.18.07.26.9

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value293288295272509381398409405390381420432298310323298297295321327314318366377314352355371180180176256250250176180174180183172152155152
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 Assets9.09.09.28.516.712.412.813.112.912.412.413.513.89.910.410.910.210.310.310.911.110.510.711.611.810.010.910.911.314.614.914.421.220.720.614.615.314.715.516.014.713.313.914.3

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value0.90.91.00.91491.82.11.82.12.73.33.03.03.83.86.56.56.96.84.64.73.23.12.2120.40.33.9238.28.20.577577761.9779.9768.5558.5528.5490.5430.5350.04.6
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Assets0.00.00.00.04.90.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.10.10.10.40.00.00.10.70.70.70.06.26.46.40.20.80.70.70.70.00.00.00.4

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-31
Value1111
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.40.4

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value11412077130120120761291111055412411511157130121137541541601457518117513975162138572763635524675852236158532830
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.72.44.13.93.92.54.13.53.31.84.03.73.71.94.44.24.71.95.35.54.92.55.85.54.42.35.04.24.72.25.25.24.62.15.55.04.42.05.45.04.72.52.8

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8.74.21.68.42116277.1038.8625.3346.606
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.10.30.80.60.80.60.70.50.6

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282019-12-31
Value9359349341013796826
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0
Percentage of Assets28.729.129.131.526.126.6

us-gaap:LongTermDebt us-gaap:DebtInstrument

mtx:JapanLoanFacilities


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282019-12-31
Value3.43.54.14.14.34.5
Percentage of LongTermDebt0.40.40.40.40.50.5
Percentage of Assets0.10.10.10.10.10.1
Percentage of Assets mtx:JapanLoanFacilities0.00.00.00.00.00.0

mtx:NetherlandsTermLoanDue2022


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282019-12-31
Value0.30.40.60.70.71.0
Percentage of LongTermDebt0.00.00.10.10.10.1
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets mtx:NetherlandsTermLoanDue20220.00.00.00.00.00.0

mtx:SeniorNotesDue2028


Long
Period End2021-07-042021-04-042020-12-312020-09-27
Value394394393393
Percentage of LongTermDebt42.142.242.238.9
Percentage of Assets12.112.312.312.2
Percentage of Assets mtx:SeniorNotesDue20280.00.00.00.0

mtx:TermLoanFacilityVariableTranche


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282019-12-312017-02-142015-06-23
Value5375365356146436427881078
Percentage of LongTermDebt57.557.457.360.780.877.70.00.0
Percentage of Assets16.516.716.719.121.120.60.00.0
Percentage of Assets mtx:TermLoanFacilityVariableTranche0.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value934933933101264782482484487489390794696696095999010191050106911171166121712551325136414181455151215297575838.28.28.478838385858593939292
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 Assets28.729.129.131.521.226.926.527.027.828.229.430.430.932.032.333.234.936.337.438.039.640.842.142.142.644.945.146.246.36.16.26.80.70.70.76.97.17.27.37.58.08.28.38.6

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312018-12-31
Value167165163180181181180196
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.25.15.65.95.95.86.4

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-04-022016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312010-12-312009-12-31
Value1721761791411451461481201231241241361421511551471471411465857105107108108909398974845
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.55.64.44.84.84.83.83.93.94.04.44.55.05.25.15.14.84.54.74.88.68.89.08.97.57.98.38.44.44.2

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.35.55.46.48.7
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent2.43.74.34.15.9
Percentage of Assets0.10.20.20.20.3
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value174143118148137
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent97.696.295.795.893.6
Percentage of Assets5.44.63.85.04.8
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value3938373534323130303331312829272625252427272827262726252524272623222323252427262829282723
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.21.21.11.11.01.01.01.01.11.01.00.91.00.90.90.90.90.90.90.90.90.90.90.80.80.80.80.82.22.21.91.91.91.92.12.12.32.32.52.52.52.42.2

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value1461451391331321221251231301299110310610510721922783812162142177422122721468161168292928253130292930338387873633
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 Assets4.54.54.34.24.34.04.03.94.24.13.03.33.43.53.67.47.82.92.87.47.37.32.57.07.16.82.14.95.12.42.42.42.12.62.52.42.52.62.97.37.47.63.33.2

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312019-12-31
Value4943
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0
Percentage of Assets1.51.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value12
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value9500000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value7600000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value6400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value24
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.7

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-09-292019-06-302019-03-31
Value60555758
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets1.91.81.81.8

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value74
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets2.3

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value13
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.4

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value14991464146014381406137914021402139013931353131012881302125111761113105610061013964951910897900872863900889867847808792789790802772770741763791781755724
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.145.645.544.746.045.045.144.944.244.143.842.141.243.342.139.438.236.535.234.532.831.930.628.528.127.626.727.526.970.169.665.965.365.265.366.465.264.963.766.767.468.367.767.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-108.1-112.4-114.9-85.0-88.8-94.0-96.1-75.2-76.8-78.5-69.7-78.1-82.8-84.6-86.5-74.3-75.5-76.8-78.0-71.0-72.2-74.8
Percentage of StockholdersEquity-7.2-7.7-7.9-5.9-6.3-6.8-6.9-5.4-5.5-5.6-5.1-6.0-6.4-6.5-6.9-6.3-6.8-7.3-7.7-7.0-7.5-8.2
Percentage of Assets-3.3-3.5-3.6-2.6-2.9-3.1-3.1-2.4-2.4-2.5-2.3-2.5-2.6-2.8-2.9-2.5-2.6-2.7-2.7-2.4-2.5-2.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012017-12-31
Value1.32.3-2.62.77.07.75.98.13.66.96.14.44.94.5
Percentage of StockholdersEquity0.10.2-0.20.20.50.60.40.60.30.50.50.30.40.4
Percentage of Assets0.00.1-0.10.10.20.30.20.30.10.20.20.10.20.2
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-324.3-329.3-308.3-311.4-316.9-328.2-290.4-279.0-262.8-242.7-233.7-238.8-220.2-167.9-186.1-184.8-193.7-207.3-221.1-174.7-178.1-180.9
Percentage of StockholdersEquity-21.6-22.5-21.1-21.7-22.5-23.8-20.7-19.9-18.9-17.4-17.3-18.2-17.1-12.9-14.9-15.7-17.4-19.6-22.0-17.2-18.5-19.9
Percentage of Assets-10.0-10.2-9.6-9.7-10.4-10.7-9.3-8.9-8.3-7.7-7.6-7.7-7.0-5.6-6.3-6.2-6.6-7.2-7.7-5.9-6.0-6.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value-217.5-219.2-190.8-229.1-235.1-241.9-200.2-211.9-189.6-171.1-170.1-165.1-142.3-89.4-104.1-114.5-122.1-134.8-147.3-106.0-107.7-108.7
Percentage of StockholdersEquity-14.5-15.0-13.1-15.9-16.7-17.5-14.3-15.1-13.6-12.3-12.6-12.6-11.0-6.9-8.3-9.7-11.0-12.8-14.6-10.5-11.2-11.9
Percentage of Assets-6.7-6.8-5.9-7.1-7.7-7.9-6.4-6.8-6.0-5.4-5.5-5.3-4.5-3.0-3.5-3.8-4.2-4.7-5.1-3.6-3.7-3.6
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-312008-12-312007-12-31
Value15381502149814731440141214341433142114271385134113171331127912021139108110301041992979937924927899888925914894874832815812813828797797768791821809782747734773
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.346.846.745.947.146.046.145.945.145.144.943.142.144.343.140.339.037.336.035.433.732.931.529.429.028.527.528.327.772.371.867.867.267.167.268.567.367.265.969.269.970.870.169.70.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value-324.3-329.3-308.3-311.4-316.9-328.2-290.4-279.0-262.8-242.7-233.7-238.8-220.2-167.9-186.1-184.8-193.7-207.3-221.1-174.7-178.1-169.9-180.9-173.3-140.1-139.4-112.9-50.3-23.6-28.3-31.265-58.7-68.2-63.2-51.198-37.8-47.7-35.3-45.331-4.818-3.593.193-31.63445
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-21.1-21.9-20.6-21.1-22.0-23.2-20.2-19.5-18.5-17.0-16.9-17.8-16.7-12.6-14.5-15.4-17.0-19.2-21.4-16.8-17.9-17.3-19.3-18.7-15.1-15.5-12.7-5.4-2.6-3.2-3.6-7.1-8.4-7.8-6.3-4.6-6.0-4.4-5.9-0.62.3-0.50.4-4.35.9
Percentage of Assets-10.0-10.2-9.6-9.7-10.4-10.7-9.3-8.9-8.3-7.7-7.6-7.7-7.0-5.6-6.3-6.2-6.6-7.2-7.7-5.9-6.0-5.7-6.1-5.5-4.4-4.4-3.5-1.5-0.7-2.3-2.6-4.8-5.6-5.2-4.2-3.1-4.0-3.0-3.9-0.41.6-0.30.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value466459453448445442442438435432431429426423422420405402400395390387387382379375373367364364361363353349345343338337335332330323318312294
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest30.330.630.230.430.931.430.830.630.630.331.232.032.431.833.034.935.637.238.838.039.339.641.341.440.941.842.039.739.940.841.343.743.343.042.541.542.542.243.642.040.241.342.642.638.1
Percentage of Assets14.314.314.113.914.614.414.214.013.813.714.013.813.614.114.214.113.913.914.013.513.213.013.012.211.811.911.611.211.129.529.729.629.128.928.628.428.628.428.829.128.129.029.70.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value4.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.94.84.84.84.84.84.84.84.84.84.84.84.84.84.84.7564.84.74.74.72.92.92.9132.92.92.8972.8882.8832.854
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.30.30.30.30.30.30.30.30.30.30.40.40.40.40.40.40.40.40.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.40.40.40.40.40.40.40.40.4
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.20.10.10.10.40.40.40.40.40.40.20.20.30.30.20.30.30.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value393837353432313030333131282927262525242727282726272625252427262322232325242726282927232322
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest2.52.62.52.42.42.32.22.22.22.42.32.32.22.22.12.22.22.42.42.72.82.92.92.92.93.02.92.82.73.03.12.82.82.92.93.13.13.43.43.53.63.53.23.22.9
Percentage of Assets1.21.21.21.11.11.01.01.01.01.11.01.00.91.00.90.90.90.90.90.90.90.90.90.90.80.80.80.80.82.22.21.91.91.91.92.12.12.32.32.52.52.42.20.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value208920492011198119551942190518781842181717691727168716451607153314931452141913841344132412921277125012251191117211361120110610851065104910321016999980963944929899836863802
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest135.8136.4134.2134.5135.7137.6132.8131.0129.6127.3127.7128.8128.1123.5125.7127.5131.1134.2137.7132.9135.5135.3137.9138.1134.8136.3134.1126.6124.4125.2126.5130.4130.6129.2126.9122.8125.3122.9125.4119.3113.1114.9111.8117.5103.7
Percentage of Assets64.263.862.761.764.063.361.260.158.557.557.355.553.954.754.151.451.250.149.647.145.744.443.440.639.038.836.935.834.590.590.988.587.886.785.384.184.382.682.782.579.180.678.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-312007-12-31
Value-737.3-720.4-700.4-685.3-682.3-682.3-659.7-639.7-628.7-618.7-618.7-613.4-610.4-602.7-597.0-597.0-596.3-596.3-596.3-596.3-596.3-596.0-593.7-593.7-593.7-593.7-593.7-593.7-593.7-593.7-593.665-585.9-562.0-551.3-541.889-522.9-520.2-514.234-511.2-489.9466436436393
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-47.9-47.9-46.7-46.5-47.4-48.3-46.0-44.6-44.2-43.3-44.7-45.7-46.3-45.3-46.7-49.7-52.4-55.1-57.8-57.3-60.1-60.9-63.3-64.2-64.0-66.0-66.8-64.1-64.9-66.4-67.9-70.4-68.9-67.8-66.6-63.1-65.2-67.0-64.6-59.659.658.359.450.9
Percentage of Assets-22.7-22.4-21.8-21.3-22.3-22.2-21.2-20.5-20.0-19.6-20.0-19.7-19.5-20.0-20.1-20.0-20.4-20.6-20.8-20.3-20.3-20.0-19.9-18.9-18.5-18.8-18.4-18.1-18.0-48.0-48.8-47.8-46.3-45.5-44.7-43.2-43.9-44.1-44.7-41.741.840.70.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value4900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04900000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04800000.04769000.04756000.04753000.04723000.04717000.04700000.02931000.02923000.02923000.02913000.02912000.02911000.02909000.02897000.02888000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.20.10.10.10.40.40.40.40.40.40.20.20.20.30.30.20.30.30.3

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032015-12-31
Value466459453448445442442438435432431429426423422420405402400395390387
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.314.314.113.914.614.414.214.013.813.714.013.813.614.114.214.113.913.914.013.513.213.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value208920492011198119551942190518781842181717691727168716451607153314931452141913841344132412921277125012251191117211361120110610851065104910321016999980963944929914899836
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets64.263.862.761.764.063.361.260.158.557.557.355.553.954.754.151.451.250.149.647.145.744.443.440.639.038.836.935.834.590.590.988.587.886.785.384.184.382.682.782.579.179.980.678.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-312008-12-31
Value-324.3-329.3-308.3-311.4-316.9-328.2-290.4-279.0-262.8-242.7-233.7-238.8-220.2-167.9-186.1-184.8-193.7-207.3-221.1-174.7-178.1-169.9-180.9-173.3-140.1-139.4-112.9-50.3-23.6-28.224-31.265-58.679-68.247-63.162-51.198-37.783-47.691-35.312-45.331-4.7591812-3.593.193-31.6
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-10.0-10.2-9.6-9.7-10.4-10.7-9.3-8.9-8.3-7.7-7.6-7.7-7.0-5.6-6.3-6.2-6.6-7.2-7.7-5.9-6.0-5.7-6.1-5.5-4.4-4.4-3.5-1.5-0.7-2.3-2.6-4.8-5.6-5.2-4.2-3.1-4.0-3.0-3.9-0.41.61.1-0.30.30.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value737720700685682682659639628618618613610602597597596596596596596596593593593593593593593593593585562551541522520514514511489-476.023466436
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.722.421.821.322.322.221.220.520.019.620.019.719.520.020.120.020.420.620.820.320.320.019.918.918.518.818.418.118.048.048.847.846.345.544.743.243.943.344.144.741.7-41.641.840.7

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value3938373534323130303331312829272625252427272827262726252524272623222323252427262829282723
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.21.21.11.11.01.01.01.01.11.01.00.91.00.90.90.90.90.90.90.90.90.90.90.80.80.80.80.82.22.21.91.91.91.92.12.12.32.32.52.52.52.42.2

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012011-12-312011-10-02
Value2.82.82.52.50.12.52.50.62.42.31.7321.8
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012011-12-312011-10-02
Value2.82.82.52.50.12.52.50.62.42.31.7321.8
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-07-042021-04-042020-06-282019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272011-12-312011-10-02
Value600000.0100000.0500000.0100000.03800000.0100000.0200000.01500000.00200000.00700000.01500000.0200000.03400000.0100000.01300000.0100000.0200000.0300000.0-1299000.00
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-07-042021-04-042020-06-282019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272011-12-312011-10-02
Value600000.0100000.0500000.0100000.03800000.0100000.0200000.01500000.00200000.00700000.01500000.0200000.03400000.0100000.01300000.0100000.0200000.0300000.0-1299000.00
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value6750925463307960673070534435577361156062758012083921543333224353940244036371934324233
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.711.221.414.017.97.318.113.414.67.015.711.59.68.313.217.214.93.915.215.517.517.823.315.421.96.217.113.312.69.814.416.015.89.616.213.814.07.314.113.016.513.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value-21500000.0-18600000.0-21300000.0-21000000.0-16800000.0-19600000.0-11600000.0-12800000.0-19400000.0-18200000.0-19100000.0-14000000.0-147700000.0-19200000.0-23000000.0-18700000.0-21100000.0-14700000.0-13900000.0-16100000.0-14900000.0-19800000.0-5200000.0-27300000.0-1819900000.0-10606000.0-11103000.0-11068000.0-14368000.0-9622000.0-15443000.0-7184000.0-14961000.0-10453000.0-17061000.0-16936000.0-11251000.0-9777000.0-13600000.0-9829000.0-7427000.0-10236000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.7-4.1-4.9-5.4-4.7-4.7-2.6-2.8-4.2-4.2-4.3-3.0-31.8-4.5-5.3-4.4-5.1-3.6-3.5-4.0-3.5-4.4-1.0-5.0-432.2-4.3-4.3-4.4-5.6-3.8-6.3-2.9-5.9-4.1-6.8-6.5-4.2-3.7-5.6-3.9-2.9-4.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value-14.3-19.3-94.8110-32.4-26.0-43.2-44.1-36.8-19.2-48.5-32.996-10.6-35.5-21.7-35.4-25.6-49.4-48.2-50.1-50.5-61.0-38.71425-0.777-13.153-16.775-13.311-6.973-16.23-7.698-10.6550.604-4.48-19.631-13.096-5.129-12.756-9.506-12.907-1.265
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.1-4.3-22.028.4-9.1-6.2-9.8-9.8-7.9-4.4-10.8-7.120.7-2.5-8.2-5.1-8.5-6.3-12.3-12.1-11.7-11.2-11.8-7.1338.5-0.3-5.1-6.6-5.2-2.8-6.6-3.1-4.20.2-1.8-7.5-4.9-2.0-5.2-3.8-5.0-0.5

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-30
Value323.7-11.314618-27.328-1.511-6.11.93.9
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.10.8-2.637.75.2-6.56.5-0.32.5-1.40.40.8

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value6750925463307960673070534435577361156062758012083921543333224353940244036371934324233
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.711.221.414.017.97.318.113.414.67.015.711.59.68.313.217.214.93.915.215.517.517.823.315.421.96.217.113.312.69.814.416.015.89.616.213.814.07.314.113.016.513.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value41393128143829382639434144397541433436412133172926352137181522212117181718191918181915161515161815
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.28.87.27.34.09.26.68.55.78.99.69.09.59.317.59.810.48.59.110.45.08.34.06.55.77.74.16.84.46.48.88.68.66.77.57.27.47.87.87.07.17.86.06.16.06.56.77.46.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value43413229143929392740444245417642433537422234173027362237191623221719181920182016171616171916
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.49.17.47.54.29.56.78.76.09.19.89.29.79.517.810.110.68.89.310.65.28.54.16.75.97.94.37.04.66.79.28.96.97.87.57.78.07.28.06.26.46.46.97.07.76.4

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value1.11.11.00.51.01.11.00.90.91.01.11.20.91.20.81.00.80.91.10.90.81.10.90.90.70.90.90.60.9210.70.60.90.4220.60.50.60.3330.7
Percentage of ProfitLoss2.62.73.43.42.52.83.62.22.02.32.42.91.22.81.82.82.12.14.92.64.53.63.32.53.22.44.63.73.93.13.44.62.33.12.53.21.74.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.30.10.20.20.20.20.20.20.20.30.20.30.20.20.20.20.30.20.20.20.20.20.10.20.20.20.40.30.20.40.20.20.20.20.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value4139281438382639434144397541433436412133162926352137181522211718171819181915
Percentage of ProfitLoss97.497.396.696.697.597.296.497.898.097.797.697.198.897.298.297.297.997.995.197.495.596.796.797.596.897.995.495.896.196.796.495.997.397.597.396.797.896.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.28.87.34.09.28.55.78.99.69.09.59.317.59.810.48.59.110.45.08.33.96.55.77.74.16.84.46.48.88.66.77.57.37.57.87.07.86.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value-21500000.0-18600000.0-21300000.0-21000000.0-16800000.0-19600000.0-11600000.0-12800000.0-19400000.0-18200000.0-19100000.0-14000000.0-147700000.0-19200000.0-23000000.0-18700000.0-21100000.0-14700000.0-13900000.0-16100000.0-14900000.0-19800000.0-5200000.0-27300000.0-1819900000.0-10606000.0-11103000.0-11068000.0-14368000.0-9622000.0-15443000.0-7184000.0-14961000.0-10453000.0-17061000.0-16936000.0-11251000.0-9777000.0-13600000.0-9829000.0-7427000.0-10236000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.7-4.1-4.9-5.4-4.7-4.7-2.6-2.8-4.2-4.2-4.3-3.0-31.8-4.5-5.3-4.4-5.1-3.6-3.5-4.0-3.5-4.4-1.0-5.0-432.2-4.3-4.3-4.4-5.6-3.8-6.3-2.9-5.9-4.1-6.8-6.5-4.2-3.7-5.6-3.9-2.9-4.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value2217211415161316171719142417222120131318151515212424192525111110128.6811414149.3541514138.205108.0337.7068.33
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value-14.3-19.3-94.8110-32.4-26.0-43.2-44.1-36.8-19.2-48.5-32.996-10.6-35.5-21.7-35.4-25.6-49.4-48.2-50.1-50.5-61.0-38.71425-0.777-13.153-16.775-13.311-6.973-16.23-7.698-10.6550.604-4.48-19.631-13.096-5.129-12.756-9.506-12.907-1.265
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.1-4.3-22.028.4-9.1-6.2-9.8-9.8-7.9-4.4-10.8-7.120.7-2.5-8.2-5.1-8.5-6.3-12.3-12.1-11.7-11.2-11.8-7.1338.5-0.3-5.1-6.6-5.2-2.8-6.6-3.1-4.20.2-1.8-7.5-4.9-2.0-5.2-3.8-5.0-0.5

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value0.00.00.00.00.06.00.00.01.21.61.16.62.50.80.915440.0750.00.00.00.00.00.00.00.01.5960.00.00.00.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.0100.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292012-12-312012-09-302011-12-312011-10-022010-12-31
Value0.30.580178300.52130201538206.20.43430322252505140515050406138740.7750.00.2788.00.2750.00.0
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument

mtx:JapanLoanFacilities


Repayments
Period End2021-07-042021-04-042020-12-312020-03-29
Value0.20.30.10.3
Percentage of RepaymentsOfLongTermDebt66.760.00.160.0

mtx:NetherlandsTermLoans


Repayments
Period End2021-07-042021-04-042020-12-312020-03-29
Value0.10.20.11.0
Percentage of RepaymentsOfLongTermDebt33.340.00.1200.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-30
Value1700000.01700000.01700000.01700000.01700000.01700000.01700000.01800000.01800000.01700000.01800000.01800000.0
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value1700000.01700000.01800000.01700000.01700000.01800000.01800000.01700000.01800000.01700000.01700000.01800000.01700000.01800000.01800000.01700000.01800000.01700000.01800000.01700000.01600000.01900000.01700000.01800000.01700000.01700000.05200000.0-1700000.0-1746000.0-1700000.0-1700000.0-1800000.0-1708000.0-900000.0-1000000.0-800000.0-902000.0-900000.0
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-02
Value1700000.01700000.01800000.01700000.01700000.01800000.01800000.01700000.01800000.01700000.01700000.01800000.01700000.01800000.01800000.01700000.01800000.01700000.01800000.01700000.01600000.01900000.01700000.01800000.01700000.01700000.05200000.0-1700000.0-1746000.0-1700000.0-1700000.0-1800000.0-1708000.0-900000.0-1000000.0-800000.0-902000.0-900000.0
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value1620153.00.022201110.00.05.33.17.65.70.00.70.00.00.00.00.22.40.00.00.00.00.00.00.00.08.86623117.587173.2065.5040.04.57220139.793125.114100.0
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range, us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

srt:Minimum, mtx:TermLoanFacilityVariableTranche


Debt
Period End2021-07-042021-04-042020-12-312020-09-272020-06-28
Value0.750.750.750.750.0075
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum mtx:TermLoanFacilityVariableTranche0.00.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-29
Value18.718.0019.60.0620.1980.0060.0640.1580.189-0.0190.1870.1890.19-0.2610.0130.2290.222-0.0070.001-0.0240.237-0.0460-0.0360.254-0.0090.021-0.0620.30.0010.003
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value13815717013321135035929272120
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1141109710214912911949746549
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-07-042021-04-042020-12-312020-09-272019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value7.06.87.68.47.91614134.05.03.94.8143.9126.4738.496
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value202322212428215.95.6666.866.276
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Sale Of Short Term Investments

us-gaap:ProceedsFromSaleOfShortTermInvestments

us-gaap:ProceedsFromSaleOfShortTermInvestments


Proceeds
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012016-12-312016-10-022015-12-312015-09-272014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value2.11.61.72.90.00.70.04.32.50.92.81.51.10.7-7.32.83.13.10.50.618-0.70.0050.6950.6721.0681.3090.00.07.8160.011.4842.211.9192.4872.7640.8671.8771.3810.0
Percentage of ProceedsFromSaleOfShortTermInvestments100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

mtx:DebtInstrumentFinancialCovenantIncreaseDecreaseInBasisSpreadIfNetLeverageRatioIsLessThanCertainThresholds us-gaap:Range, us-gaap:DebtInstrument

mtx:DebtInstrumentFinancialCovenantIncreaseDecreaseInBasisSpreadIfNetLeverageRatioIsLessThanCertainThresholds

srt:Maximum, mtx:RevolvingFacility


Debt
Period End2021-07-042021-04-042020-12-31
Value0-25.00
Percentage of DebtInstrumentFinancialCovenantIncreaseDecreaseInBasisSpreadIfNetLeverageRatioIsLessThanCertainThresholds0.0100.00.0

mtx:DebtInstrumentNetLeverageRatio us-gaap:Range, us-gaap:DebtInstrument

mtx:DebtInstrumentNetLeverageRatio

srt:Maximum, mtx:CreditAgreementFacilities


Debt
Period End2021-07-042021-04-042020-12-31
Value03.50
Percentage of DebtInstrumentNetLeverageRatio0.0100.00.0

mtx:DebtInstrumentRequiredAnnualAmortization us-gaap:DebtInstrument

mtx:DebtInstrumentRequiredAnnualAmortization

mtx:TermLoanFacilityVariableTranche


Debt
Period End2021-07-042021-04-042020-09-27
Value01.01.0
Percentage of DebtInstrumentRequiredAnnualAmortization0.0100.0100.0

mtx:IncreaseDecreaseInOperatingCapitalExcludingObligationForPensionAndOtherPostretirementBenefits

mtx:IncreaseDecreaseInOperatingCapitalExcludingObligationForPensionAndOtherPostretirementBenefits


Increase
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-29
Value3.2211.4-16.837-0.3
Percentage of IncreaseDecreaseInOperatingCapitalExcludingObligationForPensionAndOtherPostretirementBenefits100.0100.0100.0100.0100.0100.0

mtx:MarketPriceOfCommonStockHigh

mtx:MarketPriceOfCommonStockHigh


Market
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value64.1653.3455.4258.9158.1255.3363.261.0167.6577.7576.476.9573.5575.680.283.782.972.5161.6657.1261.868.1574.2174.7477.467.0266.564.4860.449.0349.0343.1243.0439.9236.9933.633.633.9633.9658.068.6370.0968.7366.8159.6859.5356.05
Percentage of MarketPriceOfCommonStockHigh100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:MarketPriceOfCommonStockLow

mtx:MarketPriceOfCommonStockLow


Market
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value51.143.1131.9128.948.9245.5551.7849.4747.8965.7565.166.166.462.9570.572.266.156.052.5337.0345.3546.6966.4959.058.0657.1459.4948.8149.2842.5342.5338.4339.5434.2530.530.8130.8128.7828.7846.7549.2763.0162.4656.4345.7346.946.36
Percentage of MarketPriceOfCommonStockLow100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:OperatingIncomeAsPercentageOfNetSales

mtx:OperatingIncomeAsPercentageOfNetSales


Operating
Period End2020-12-312020-09-272020-06-282020-03-29
Value14.113.811.712.9
Percentage of OperatingIncomeAsPercentageOfNetSales100.0100.0100.0100.0

mtx:PaymentsToAcquireAssets

mtx:PaymentsToAcquireAssets


Payments
Period End2020-12-31
Value0
Percentage of PaymentsToAcquireAssets0.0

mtx:UnrecognizedTaxBenefitsIncreaseDecreaseInIncomeTaxPenaltiesAndInterestExpense

mtx:UnrecognizedTaxBenefitsIncreaseDecreaseInIncomeTaxPenaltiesAndInterestExpense


Unrecognized
Period End2021-07-04
Value100000.0
Percentage of UnrecognizedTaxBenefitsIncreaseDecreaseInIncomeTaxPenaltiesAndInterestExpense100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2020-12-312020-09-272020-06-282019-12-312019-09-292019-06-302018-12-312018-09-302017-12-312017-10-012017-07-022016-12-312016-10-022016-07-032015-12-312015-09-272015-06-282014-12-312014-09-282014-06-29
Value0.01.16.00.00.07.50.70.05.30.00.00.00.018135.315230.00.0
Percentage of AssetImpairmentCharges0.0100.0100.00.00.0100.0100.00.0100.00.00.00.00.0100.0100.0100.0100.0100.00.00.0

us-gaap:AssetImpairmentCharges us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

mtx:PaperPcc, mtx:SpecialtyMinerals


Asset
Period End2020-08-312020-09-272020-06-302020-06-28
Value1.11.16.06.0
Percentage of AssetImpairmentCharges100.00.00.0100.0

us-gaap:AssetImpairmentCharges us-gaap:StatementBusinessSegments

mtx:SpecialtyMinerals


Asset
Period End2020-12-312020-09-272020-06-282019-12-312019-09-292019-06-30
Value0.01.16.00.00.01.6
Percentage of AssetImpairmentCharges0.0100.0100.00.00.021.3

us-gaap:BusinessCombinationIntegrationRelatedCosts

us-gaap:BusinessCombinationIntegrationRelatedCosts


Business
Period End2021-07-04
Value400000.0
Percentage of BusinessCombinationIntegrationRelatedCosts100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-302013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-06-302012-04-012012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value0.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.0250.0250.0250.0250.0250.050.050.050.050.050.050.050.05
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-042010-04-04
Value0.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.05-0.020.050.050.050.050.050.050.050.050.05
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

mtx:NetherlandsTermLoans, mtx:EuroInterbankOfferedRateEuribor


Debt
Period End2021-04-042020-09-272020-06-28
Value2.02.00.02
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0100.0

mtx:RevolvingFacility, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-04-042020-09-272020-06-28
Value1.6251.6250.01625
Percentage of DebtInstrumentBasisSpreadOnVariableRate181.281.281.2

mtx:TermLoanFacilityVariableTranche, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-04-042020-09-272020-06-28
Value2.252.250.0225
Percentage of DebtInstrumentBasisSpreadOnVariableRate1112.5112.5112.5

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod

us-gaap:DebtInstrumentRedemptionPricePercentage

mtx:SeniorNotesDue2028, mtx:RedemptionOfNotesForCashPriorToJuly12023


Debt
Period End2021-07-042021-04-042020-12-31
Value0100.00
Percentage of DebtInstrumentRedemptionPricePercentage0.0100.00.0

mtx:SeniorNotesDue2028, mtx:RedemptionOfNotesIfCompanyExperiencesChangeOfControl


Debt
Period End2021-07-042021-04-042020-12-31
Value0101.00
Percentage of DebtInstrumentRedemptionPricePercentage0.0101.00.0

mtx:SeniorNotesDue2028, mtx:RedemptionOfNotesWithFundsFromOneOrMoreEquityOfferingsPriorToJuly12023


Debt
Period End2021-07-042021-04-042020-12-31
Value0105.00
Percentage of DebtInstrumentRedemptionPricePercentage0.0105.00.0

us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod

us-gaap:DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed

mtx:SeniorNotesDue2028, mtx:RedemptionOfNotesWithFundsFromOneOrMoreEquityOfferingsPriorToJuly12023


Debt
Period End2021-07-042021-04-042020-12-31
Value040.00
Percentage of DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed0.0100.00.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value200000.0200000.0400000.0100000.0200000.0200000.0300000.0200000.0200000.0200000.0300000.0200000.0200000.0200000.0100000.0100000.0100000.0100000.00100000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value-3600000.0-3400000.0-4300000.0-4000000.0-2800000.0-2800000.0-3200000.0-2300000.0-2300000.0-2300000.0-2300000.0-2900000.0-2700000.0-2700000.0-4500000.0-2100000.0-2100000.0-2100000.0-3100000.0-2500000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-1800.0-1700.0-1075.0-4000.0-1400.0-1400.0-1066.7-1150.0-1150.0-1150.0-766.7-1450.0-1350.0-1350.0-4500.0-2100.0-2100.0-2100.00.0-2500.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value100000.0100000.0100000.0100000.0100000.0-300000.0100000.0100000.0100000.0-300000.0100000.0100000.0200000.0-1700000.0500000.0600000.0500000.00200000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DefinedBenefitPlanContributionsByEmployer us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312020-09-272019-12-312019-03-312018-12-312018-09-302017-12-31
Value0.10.20.20.00.00.00.0
Percentage of DefinedBenefitPlanContributionsByEmployer100.0100.0100.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302017-12-31
Value3.09999999999999961.04.92.62.12.51.71.45.66.45.4
Percentage of DefinedBenefitPlanContributionsByEmployer0.00.04900.01300.01050.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value5.45.45.04.75.25.24.34.64.64.65.65.04.84.85.14.54.64.54.74.6
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value0.10.00.10.00.00.10.00.10.10.00.00.10.10.10.10.10.00.1
Percentage of DefinedBenefitPlanInterestCost100.00.0100.00.00.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value2.02.02.19999999999999932.42.92.93.33.63.63.53.73.23.03.03.43.03.13.13.23.1
Percentage of DefinedBenefitPlanInterestCost0.00.02200.00.02900.00.00.03600.00.03500.03700.00.00.03000.03400.03000.03100.03100.00.03100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value-0.1-0.2-0.2-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.4-0.3-0.3-0.3-0.7-0.7-0.7-0.7-0.8-0.7
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value4.52.14.14.86.92.63.23.23.23.13.26.73.03.13.52.53.33.33.82.9
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-4500.0-1050.0-2050.0-4800.0-6900.0-2600.0-1600.0-3200.0-3200.0-3100.0-800.0-2233.3-1000.0-1033.3-500.0-357.1-471.4-471.4-475.0-414.3

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-09-272020-06-282019-09-292019-06-302018-09-30
Value-1100000.0-4300000.000-3600000.0
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.00.00.0100.0

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042020-06-28
Value-2200000.0-4300000.0
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1100.0100.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-07-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value0.10.10.00.00.10.10.00.10.00.00.10.10.10.10.10.10.10.00.1
Percentage of DefinedBenefitPlanServiceCost100.0100.00.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-02
Value2.02.01.91.92.02.01.41.81.81.82.31.92.02.02.41.42.12.11.91.7
Percentage of DefinedBenefitPlanServiceCost2000.00.01900.00.00.02000.01400.00.01800.00.00.01900.02000.02000.02400.01400.02100.02100.00.01700.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents


Effect
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value0.9-9.3122.73.9-12.03.6-4.80.50.5-0.7-2.4-13.25.12.01.44.04.4-8.80.3-1.40.3-5.8-9.54.7-11.2-6.9-6.10.726-1.0260.9065.613-0.913-7.8551.5342.542-8.0164.982-6.617-13.1972.028.821-2.06511-10.225-7.575
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:GainLossRelatedToLitigationSettlement


Gain
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-30
Value0-1500000.0-8300000.0-600000.0-5300000.0-5600000.00
Percentage of GainLossRelatedToLitigationSettlement0.0100.0100.0100.0100.0100.00.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-30
Value500000.0500000.0200000.0500000.01200000.0300000.0500000.0800000.0500000.0100000.0600000.0600000.01100000.01200000.0800000.0400000.0100000.0200000.0500000.0700000.0600000.0300000.0400000.0500000.0500000.0400000.0600000.0300000.0200000.00000
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations


Increase
Period End2020-12-312020-09-272019-12-312019-09-292018-12-312018-09-302017-12-312017-10-01
Value-5300000.0-2600000.0-2100000.0-2500000.0-5600000.0-6300000.0-5400000.0-2300000.0
Percentage of IncreaseDecreaseInPensionAndPostretirementObligations100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Oci
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-30
Value-1.04.9-4.3-0.71.84.5-3.31.30.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Oci
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-31
Value0.7-23.51.76.1-39.9-17.8-21.80.3
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent-70.0-479.6-39.5-871.4-2216.7-395.6660.623.1

us-gaap:AccumulatedTranslationAdjustment


Oci
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-02
Value1.7-28.46.06.8-41.7-22.3-18.5-1.0-22.8-52.9147.612121.7
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent-170.0-579.6-139.5-971.4-2316.7-495.6560.6-76.90.00.00.00.00.00.00.0

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense


Operating
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-29
Value3.13.13.03.13.13.13.13.0
Percentage of OperatingLeaseRightOfUseAssetAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-01
Value-4.3-2.529-3.7-5.3-2.121-1.6-1.7-1.6-8.5-4.6-1.9-1.912-1.0-1.3-1.27.0-1.2-1.3-1.3-2.7-1.6-1.5-1.433-0.8-0.8-0.826281.91.983-1.766-13.2111.8291.831
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-30
Value1.40.81.41.70.60.60.50.61.60.50.50.70.50.50.60.60.70.90.90.90.50.40.41.00.9
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax


Other
Period End2021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-04
Value4900000.0-5200000.0-4300000.0-800000.01800000.0-2300000.04500000.0-3300000.01200000.01700000.0-400000.0-1300000.01600000.0500000.0100000.0-400000.0100000.01900000.0400000.0-800000.00000000100000.0-106000.03000.0-3000.0-72000.0586000.0-584000.0-299000.01213000.0-534000.0429000.01500000.0-400000.0-942000.0620000.0-3600000.03500000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-02
Value-3000000.0-4100000.03300000.0200000.0400000.0-1700000.02000000.04400000.0-2400000.0-2100000.03500000.0-2000000.0900000.01100000.010600000.0-4200000.0-2600000.0-2100000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherRestructuringCosts us-gaap:StatementBusinessSegments

us-gaap:OtherRestructuringCosts

us-gaap:Corporate


Other
Period End2020-09-272020-06-282019-06-30
Value0.10.20.0
Percentage of OtherRestructuringCosts100.0100.00.0

us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1

us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1


Other
Period End2021-07-042021-04-042020-12-312019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-07-022017-04-02
Value0700000.01400000.0900000.0200000.000000300000.000
Percentage of OtherSignificantNoncashTransactionValueOfConsiderationGiven10.0100.0100.0100.0100.00.00.00.00.00.0100.00.00.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


Payments
Period End2021-07-042021-04-042020-12-312013-09-292013-06-302013-03-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-042010-04-04
Value200000.0600000.0400000.0-254000.0000-206000.0-620000.0-604000.0-923000.0-833000.0-1627000.0-1049000.0-1763000.0
Percentage of PaymentsForRestructuring100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312019-12-312019-09-292018-12-312018-09-302017-12-312017-10-012015-12-312015-09-272014-12-312014-09-282013-12-312013-09-29
Value0.00.00.00.10.00.00.00.00.00.00.00.00.0
Percentage of PaymentsOfDebtIssuanceCosts0.00.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-10-02
Value500000.0100000.0200000.00500000.00100000.0200000.03800000.0100000.0200000.01400000.0100000.0100000.00700000.01500000.0200000.03400000.0100000.01300000.0100000.0200000.0300000.0400000.0200000.0003004000.0296000.01637000.00277000.0486000.01206000.0145000.03449000.0-200000.00
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-04-03
Value02800000.00-100000.0100000.02000000.00-200000.001900000.00-100000.003200000.00100000.0300000.03200000.00
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation0.0100.00.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireBusinessesGross

mtx:NormericaInc, us-gaap:SubsequentEvent


Payments
Period End2021-07-26
Value185
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PaymentsToAcquireShortTermInvestments


Payments
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value2.62.52.70.51.83.70.00.83.21.52.13.11.21.3-7.30.81.11.60.14.11.90.60.02.30.71.74.51.80.00.00.01.7672.6990.9411.3280.9880.4912.5834.2023.8850.04.3364.0573.6731.1021.906
Percentage of PaymentsToAcquireShortTermInvestments100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:PensionExpenseReversalOfExpenseNoncash

us-gaap:PensionExpenseReversalOfExpenseNoncash


Pension
Period End2021-07-042020-12-312020-09-272020-06-282019-06-30
Value2200000.01000000.01100000.04300000.00
Percentage of PensionExpenseReversalOfExpenseNoncash100.0100.0100.0100.00.0

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromMinorityShareholders


Proceeds
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-31
Value001000000.0700000.000-200000.0800000.003700000.0000
Percentage of ProceedsFromMinorityShareholders0.00.0100.0100.00.00.0100.0100.00.0100.00.00.00.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value4.65.82.50.00.30.41.50.30.30.10.80.31.30.60.2110.32.21.43.50.10.51.20.00.50.80.60.20.8371.7630.7056.761.8922.7511.9833.8360.272.0840.8340.2570.9193.9020.5820.2660.0910.147
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAdditions

us-gaap:PropertyPlantAndEquipmentAdditions


Property
Period End2020-09-27
Value9200000.0
Percentage of PropertyPlantAndEquipmentAdditions100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-30
Value5.73.35.17.02.72.22.22.26.22.42.41.71.81.71.81.92.02.52.42.31.31.21.22.92.9
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-04-032015-09-272015-06-282015-03-292014-09-28
Value-4300000.0-2500000.0-3800000.0-5200000.0-2100000.0-1600000.0-1700000.0-1600000.0-4700000.0-1800000.0-1900000.0-1200000.0-1300000.0-1200000.0-1300000.0-1600000.0-1600000.0-1400000.0-4200000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


Reclassification
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-31
Value-4300000.0-2500000.0-3800000.0-5200000.0-2100000.0-1600000.0-1700000.0-1600000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-28
Value4.32.53.75.32.11.61.71.64.61.91.91.01.31.21.21.31.31.61.5
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfShortTermDebt

us-gaap:RepaymentsOfShortTermDebt


Repayments
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-30
Value0.01000.60.31.81.10.50.63.09.9
Percentage of RepaymentsOfShortTermDebt0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings


Restricted
Period End2021-04-04
Value-2600000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings100.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Restricted
Period End2021-04-04
Value-2600000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2020-12-312019-12-312019-09-292019-06-302018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-312013-09-292013-06-302012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value0.00.00.0131.80.30.40.0140.40.20.30.9-2.3280.91710160.0315.86.00.00.00.00.00.00.00.00.00.240.00.230.00.00.0130.852
Percentage of RestructuringCharges0.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.00.00.0100.0100.0

us-gaap:RestructuringCostsAndAssetImpairmentCharges

us-gaap:RestructuringCostsAndAssetImpairmentCharges


Restructuring
Period End2020-12-312020-09-272020-06-282019-12-312019-09-292019-06-30
Value-0.41.56.50.00.013
Percentage of RestructuringCostsAndAssetImpairmentCharges100.0100.0100.00.00.0100.0

us-gaap:SeveranceCosts1

us-gaap:SeveranceCosts1


Severance
Period End2020-12-312020-09-272020-06-282019-12-312019-09-292019-06-30
Value-0.30.30.30.00.05.7
Percentage of SeveranceCosts1100.0100.0100.00.00.0100.0

us-gaap:SeveranceCosts1 us-gaap:StatementBusinessSegments

mtx:SpecialtyMinerals


Severance
Period End2020-12-312020-09-272020-06-282019-12-312019-09-292019-06-30
Value-0.30.30.30.00.00.9
Percentage of SeveranceCosts1100.0100.0100.00.00.015.8

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross


Stock
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-01
Value4.65.80.10.20.50.30.20.10.31.40.5
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-01
Value4.65.80.10.20.50.30.20.10.31.40.5
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-07-042021-04-042020-09-272020-03-292019-09-292019-06-302018-12-312018-09-302018-07-012018-04-012017-12-312016-12-312016-10-022016-07-032016-04-032014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302011-12-312011-10-02
Value16203.0221110.05.33.07.75.70.00.00.00.32.30.0-7.776-23.9-10.7-9.4-18.955-2.7-3.004-21.4
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-07-042021-04-042020-09-272020-03-292019-09-292019-06-302018-12-312018-09-302018-07-012018-04-012017-12-312016-12-312016-10-022016-07-032016-04-032014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302011-12-312011-10-02
Value16203.0221110.05.33.07.75.70.00.00.00.32.30.0-7.776-23.9-10.7-9.4-18.955-2.7-3.004-21.4
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense


Unrecognized
Period End2021-04-042020-06-282019-09-292019-06-302018-09-302018-07-012017-10-012017-07-022016-10-022016-07-032015-09-272015-06-282014-09-282014-06-292013-09-292013-06-302012-09-302012-07-012011-10-022011-07-03
Value100000.0100000.0400000.0-100000.0200000.0200000.0-100000.0200000.0100000.0100000.0100000.0200000.0100000.0100000.0100000.0500000.0100000.0100000.0-100000.0-100000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease


Unrecognized
Period End2020-09-27
Value100000.0
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-07-042021-04-042020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-012017-07-022017-04-022016-10-022016-07-032016-04-032015-09-272015-06-282015-03-292014-09-282014-06-292014-03-302013-09-292013-06-302013-03-312012-09-302012-07-012012-04-012011-10-022011-07-032011-04-032010-10-032010-07-04
Value400000.0200000.000100000.0100000.0100000.0300000.0300000.0300000.0300000.0500000.0600000.0400000.0300000.0100000.0300000.0300000.0200000.0300000.0300000.0300000.0300000.0200000.0300000.0100000.00.1100000.0100000.0100000.0100000.0100000.00
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:EntityNumberOfEmployees us-gaap:BusinessAcquisition

dei:EntityNumberOfEmployees

mtx:NormericaInc


Entity
Period End2020-12-31
Value300.0
Percentage of EntityNumberOfEmployees100.0

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value-3100000.0300000.0300000.0700000.01800000.01000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax100.0100.0100.0100.0100.0100.0

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInUnrecognizedPensionCostsEffectTax

mtx:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInUnrecognizedPensionCostsEffectTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value643025303938
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInUnrecognizedPensionCostsEffectTax100.0100.0100.0100.0100.0100.0

mtx:DeferredCompensationPlanAssetFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

mtx:DeferredCompensationPlanAssetFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value14131212101212
Percentage of DeferredCompensationPlanAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

mtx:DeferredCompensationPlanAssetFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value14131212101212
Percentage of DeferredCompensationPlanAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

mtx:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

mtx:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour


Finite
Period End2021-07-042021-04-042020-09-27
Value149149158
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour100.0100.0100.0

mtx:InterestRateSwapAssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

mtx:InterestRateSwapAssetsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-7600000.0-5900000.0300000.02900000.02500000.0
Percentage of InterestRateSwapAssetsFairValueDisclosure100.0100.0100.0100.0100.0

mtx:InterestRateSwapAssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-7600000.0-5900000.0300000.02900000.02500000.0
Percentage of InterestRateSwapAssetsFairValueDisclosure100.0100.0100.0100.0100.0

mtx:LossContingencyClaimsDismissedCumulativeNumber us-gaap:LossContingenciesByNatureOfContingency

mtx:LossContingencyClaimsDismissedCumulativeNumber

mtx:AsbestosCases


Loss
Period End2020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-10-022016-07-03
Value88.083.078.064.061.059.057.057.054.054.054.053.050.050.048.048.048.0
Percentage of LossContingencyClaimsDismissedCumulativeNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:SilicaCases


Loss
Period End2020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-10-022016-07-03
Value1493.01493.01493.01493.01493.01493.01493.01493.01493.01493.01493.01493.01493.01493.01492.01492.01492.0
Percentage of LossContingencyClaimsDismissedCumulativeNumber1696.61798.81914.12332.82447.52530.52619.32619.32764.82764.82764.82817.02986.02986.03108.33108.33108.3

mtx:LossContingencyCumulativeLitigationExpenses us-gaap:LossContingenciesByNatureOfContingency

mtx:LossContingencyCumulativeLitigationExpenses

mtx:ArbitrationForBankruptcyEstateOfNovindaCorp


Loss
Period End2020-09-27
Value11
Percentage of LossContingencyCumulativeLitigationExpenses100.0

mtx:MarketPriceOfCommonStockClose

mtx:MarketPriceOfCommonStockClose


Market
Period End2020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-10-022011-07-032011-04-032010-12-312010-10-032010-07-042010-04-04
Value62.1249.2343.232.4857.6352.7753.5158.7951.3467.675.3566.9568.8570.6573.276.677.2570.6957.3857.1245.8650.3169.0270.6569.4563.4565.0163.5760.0748.9541.3441.5139.9235.4631.8932.756.5349.2767.6668.7365.4158.6546.952.3
Percentage of MarketPriceOfCommonStockClose100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtx:MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans

mtx:MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans


Maximum
Period End2021-07-042021-04-042020-12-312020-09-27
Value22.022.022.021.0
Percentage of MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans100.0100.0100.0100.0

mtx:SupplementaryPensionPlanAssetFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

mtx:SupplementaryPensionPlanAssetFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Supplementary
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value15121011109.89.9
Percentage of SupplementaryPensionPlanAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

mtx:SupplementaryPensionPlanAssetFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Supplementary
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value15121011109.89.9
Percentage of SupplementaryPensionPlanAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:EnvironmentalRemediationSite

us-gaap:AccrualForEnvironmentalLossContingencies

mtx:CanaanConnecticutPlant


Accrual
Period End2020-09-27
Value400000.0
Percentage of AccrualForEnvironmentalLossContingencies100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-31
Value-2600000.05900000.06100000.04500000.04200000.02600000.02600000.02500000.02600000.02600000.02600000.02700000.02100000.02700000.03000000.01800000.02300000.01800000.0300000.01700000.0-300000.01100000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-31
Value114966986787482-50.2-51.0-79.7-81.6-83.6-85.372-73.9-75.7-77.5-50.0-48.9-51.9-52.2-65.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4.2-3.7-4.1-4.8-4.1
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax-3.7-3.9-5.9-5.5-5.3

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value11999739182
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax103.7103.7105.6105.5105.1

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-312008-12-31
Value-190.8-200.2-170.1-104.1-147.3-108.7-33.4191718101732312338294367465532
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value15123.24.27.94.43.61.7153.8373.0082.44
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2020-12-312019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-312009-12-31
Value2423232323232120202222222221212121212222222323231414151414151514151414141414
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationCurrent

us-gaap:AssetRetirementObligationCurrent


Asset
Period End2021-07-042021-04-042020-12-312020-09-27
Value600000.0600000.0400000.0500000.0
Percentage of AssetRetirementObligationCurrent100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


Asset
Period End2021-07-042021-04-042020-12-312020-09-27
Value23232323
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

mtx:TermLoanFacilityVariableTranche


Debt
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282019-12-31
Value101112131416
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsNet

mtx:SeniorNotesDue2028


Deferred
Period End2021-07-042021-04-042020-12-312020-09-27
Value5800000.05900000.06100000.06300000.0
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312018-12-31
Value2323252223232326
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value252267267236361350
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value313334333437259.6111110
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2831282235291814121110
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4639334055555721434019
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value292922284936399.4129.75213
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value696969639698891312-11.387-10.527
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value13171511144.55.41.63.983-4.067-2.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1691811821612512472641410-4.832-6.203
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value501450389435394382393269287250
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4200000.03700000.04100000.04100000.01700000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-119000000.0-99600000.0-73500000.0-91400000.0-82100000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax-2833.3-2691.9-1792.7-2229.3-4829.4

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100000.0100000.0100000.0-100000.0-100000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4.6-5.9-5.7-6.9-9.3
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-176.1-144.4-119.6-149.3-138.6
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet3828.32447.52098.22163.81490.3

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2.010.02750.03750.03160.0360.03890.03660.04370.03770.0430.0570.057
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2.980.02990.03010.03010.02960.03040.03050.0310.03140.0310.0320.032
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.65.95.76.99.39.3
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value534484416469427416
Percentage of DefinedBenefitPlanBenefitObligation11615.28210.27303.56804.34601.14479.6

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.72.32.52.7
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value133134128131
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter7847.15830.45120.04874.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.40.40.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value24252122
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths8000.06250.05400.04580.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.50.50.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value26272426
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive8900.05400.04940.05240.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.50.50.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value27272425
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour9033.35440.04880.05080.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.40.40.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value27272225
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree9100.06750.05725.05100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.40.40.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value25252224
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo8400.06325.05550.04860.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.30.30.30.5
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value11119.715
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear3766.73800.03233.33000.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-01
Value0.30.30.30.30.30.30.30.30.50.50.50.6
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-07-042021-04-042020-09-272020-06-282020-03-292019-09-292019-06-302019-03-312018-09-302018-07-012018-04-012017-10-01
Value11119.09.09.09.79.79.724201510.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear3666.73766.73000.03000.03000.03233.33233.33233.34800.04000.03000.01666.7

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value358340296320289282295240212187
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:CorporateDebtSecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value99981131169498
Percentage of DefinedBenefitPlanFairValueOfPlanAssets27.829.138.336.232.734.7

us-gaap:DefinedBenefitPlanEquitySecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value200187162179
Percentage of DefinedBenefitPlanFairValueOfPlanAssets55.855.154.956.0

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value18172723
Percentage of DefinedBenefitPlanFairValueOfPlanAssets5.05.29.27.2

us-gaap:DefinedBenefitPlanEquitySecuritiesUs


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value182169135156
Percentage of DefinedBenefitPlanFairValueOfPlanAssets50.849.945.648.8

us-gaap:FixedIncomeSecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value999811311694
Percentage of DefinedBenefitPlanFairValueOfPlanAssets27.829.138.336.232.7

us-gaap:OtherDebtSecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5752182218
Percentage of DefinedBenefitPlanFairValueOfPlanAssets16.115.56.17.16.4

us-gaap:RealEstate


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
Value1.00.92.32.41.92.52.21.11.00.20.2
Percentage of DefinedBenefitPlanFairValueOfPlanAssets0.30.30.80.70.70.90.70.50.50.10.0

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

us-gaap:CorporateDebtSecurities, us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value808280826365
Percentage of DefinedBenefitPlanFairValueOfPlanAssets22.424.327.325.621.923.2

us-gaap:CorporateDebtSecurities, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value191632343132
Percentage of DefinedBenefitPlanFairValueOfPlanAssets5.44.811.010.610.811.5

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value18172723
Percentage of DefinedBenefitPlanFairValueOfPlanAssets5.05.29.27.2

us-gaap:DefinedBenefitPlanEquitySecuritiesUs, us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value182169135156
Percentage of DefinedBenefitPlanFairValueOfPlanAssets50.849.945.648.8

us-gaap:OtherDebtSecurities, us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.30.40.30.20.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets0.10.10.10.10.0

us-gaap:OtherDebtSecurities, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value49450.00.00.2
Percentage of DefinedBenefitPlanFairValueOfPlanAssets13.913.40.00.00.1

us-gaap:OtherDebtSecurities, us-gaap:FairValueInputsLevel3


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7.37.0172218
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2.02.16.07.06.4

us-gaap:RealEstate, us-gaap:FairValueInputsLevel3


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1.00.92.32.41.92.51.21.11.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets0.30.30.80.70.70.90.40.50.5

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value280270244261237231217189162
Percentage of DefinedBenefitPlanFairValueOfPlanAssets78.479.682.281.682.082.073.578.776.7

us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value696132343133513031
Percentage of DefinedBenefitPlanFairValueOfPlanAssets19.318.111.010.611.011.717.512.714.6

us-gaap:FairValueInputsLevel3


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value8.37.920242017262018
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2.32.36.77.77.06.39.08.68.7

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanSponsorLocation

country:US


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value271261227241221213
Percentage of DefinedBenefitPlanFairValueOfPlanAssets75.876.976.575.576.775.4

us-gaap:ForeignPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value867869786769
Percentage of DefinedBenefitPlanFairValueOfPlanAssets24.223.123.524.523.324.6

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value358340296320289282
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4.6-5.9-5.76.99.3
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-176.1-144.4-119.6149138
Percentage of DefinedBenefitPlanFundedStatusOfPlan3828.32447.52098.22163.81490.3

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:Range, us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

srt:Maximum, us-gaap:DefinedBenefitPlanEquitySecurities


Defined
Period End2020-12-312019-12-312018-12-31
Value65.00.650.65
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0100.0

srt:Maximum, us-gaap:FixedIncomeSecurities


Defined
Period End2020-12-312019-12-312018-12-31
Value35.00.350.35
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage53.853.853.8

srt:Maximum, us-gaap:OtherDebtSecurities


Defined
Period End2020-12-312019-12-312018-12-31
Value15.00.150.15
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage23.123.123.1

srt:Minimum, us-gaap:DefinedBenefitPlanEquitySecurities


Defined
Period End2020-12-312019-12-312018-12-31
Value55.00.550.55
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage84.684.684.6

srt:Minimum, us-gaap:FixedIncomeSecurities


Defined
Period End2020-12-312019-12-312018-12-31
Value30.00.30.3
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage46.246.246.2

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1


Defined
Period End2020-12-31
Value5.0
Percentage of DefinedBenefitPlanUltimateHealthCareCostTrendRate1100.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value100.01.01.01.01.01.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DefinedBenefitPlanEquitySecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value55.80.5510.5490.56
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations55.855.154.956.0

us-gaap:FixedIncomeSecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value27.80.2910.3830.3620.327
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations27.829.138.336.232.7

us-gaap:OtherDebtSecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16.10.1550.060.070.064
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations16.115.56.07.06.4

us-gaap:RealEstate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.30.0030.0080.0080.0070.0090.0070.0050.005
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations0.30.30.80.80.70.90.70.50.5

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

us-gaap:DerivativeNotionalAmount

mtx:InterestRateSwap1, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-04-042020-12-312020-09-272020-06-282020-03-292016-07-03
Value1429435771300
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPayableAmountPerShare us-gaap:Dividends, us-gaap:SubsequentEventType

us-gaap:DividendsPayableAmountPerShare

us-gaap:DividendDeclared, us-gaap:SubsequentEvent


Dividends
Period End2021-01-31
Value0.05
Percentage of DividendsPayableAmountPerShare100.0

us-gaap:DividendsPayableCurrentAndNoncurrent us-gaap:Dividends, us-gaap:SubsequentEventType

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DividendDeclared, us-gaap:SubsequentEvent


Dividends
Period End2021-01-31
Value1700000.0
Percentage of DividendsPayableCurrentAndNoncurrent100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStockOption


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4700000.04600000.04500000.04500000.03800000.03600000.02700000.02400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6400000.06100000.05100000.05100000.06100000.08400000.04700000.03400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized136.2132.6113.3113.3160.5233.3174.1141.7

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2020-12-312019-12-31
Value1716
Percentage of EquityMethodInvestments100.0100.0

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

us-gaap:FairValueHedgeAssetsAtFairValue

us-gaap:OtherNoncurrentAssets, us-gaap:CrossCurrencyInterestRateContract, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Fair
Period End2021-07-042021-04-042020-12-312020-09-27
Value4.06.10.48.5
Percentage of FairValueHedgeAssetsAtFairValue100.0100.0100.0100.0

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

us-gaap:FairValueHedgeLiabilitiesAtFairValue

us-gaap:OtherCurrentLiabilities, mtx:InterestRateSwap1, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Fair
Period End2020-09-272020-06-28
Value100000.0200000.0
Percentage of FairValueHedgeLiabilitiesAtFairValue100.0100.0

us-gaap:OtherNoncurrentLiabilities, mtx:InterestRateSwap2, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Fair
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-29
Value6000000.06800000.07700000.08500000.09200000.09700000.0
Percentage of FairValueHedgeLiabilitiesAtFairValue0.00.00.08500.04600.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FairValueInputsLevel3


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value8.32120242017262018
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value6462605755535048464441393735333129272523211819171513119.57.56.56.36.26.15.95.85.65.65.35.55.35.14.7
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

mtx:PatentsAndTrademarks


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302012-12-31
Value6.26.26.16.16.06.05.95.65.55.45.35.35.25.04.94.84.74.64.54.44.34.24.14.03.93.83.83.73.63.63.4
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization9.69.910.110.610.811.311.613.414.014.615.116.116.717.218.119.120.321.923.822.324.227.330.634.841.150.758.558.758.159.058.6

us-gaap:CustomerRelationships


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value6.66.15.95.35.24.64.44.13.83.53.23.12.82.42.22.01.81.61.41.21.00.80.60.50.20.10.10.10.00.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization10.29.89.89.29.48.78.78.58.27.97.77.97.56.96.76.46.25.95.65.24.84.23.02.81.30.70.91.10.00.0

us-gaap:TechnologyBasedIntangibleAssets


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value1010.09.69.28.88.48.07.67.26.86.46.05.65.24.84.54.23.93.63.43.12.82.52.21.81.41.00.60.20.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization16.016.015.915.915.915.815.715.715.615.415.315.315.114.914.514.514.414.414.314.714.814.812.712.411.710.48.76.32.70.0

us-gaap:TradeNames


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value414038373534323129282624232220191816151312109.38.06.45.13.72.20.80.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization64.264.364.164.363.964.264.063.963.763.763.662.862.863.162.762.462.261.661.059.758.657.147.244.941.638.132.223.210.70.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value150
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-07-042021-04-042020-12-312020-09-27
Value36369.336
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-07-042021-04-042020-09-27
Value4800000.06900000.02500000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-07-042021-04-042020-12-312020-09-27
Value36369.036
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-07-042021-04-042020-12-312020-09-27
Value36369.036
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-07-042021-04-042020-12-312020-09-27
Value36369.136
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value2552542562542532532532532542552552492492292292292292292292292292292322322322232232272279.3
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value262526252424242425262614144.54.54.54.54.54.54.54.54.54.54.54.54.44.44.34.30.0
Percentage of FiniteLivedIntangibleAssetsGross10.210.110.510.19.89.69.79.69.910.410.45.85.82.02.02.02.02.02.02.02.02.01.91.91.92.02.01.91.90.0

us-gaap:TechnologyBasedIntangibleAssets


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value18181818181818181818181818181818181818181818181818181818180.0
Percentage of FiniteLivedIntangibleAssetsGross7.47.47.37.47.47.47.47.47.47.37.37.57.58.28.28.28.28.28.28.28.28.28.18.18.18.48.48.28.20.0

us-gaap:TradeNames


Finite
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292013-12-31
Value2032032032032032032032032032042042092091991991991991991991991991991991991991911911941940.0
Percentage of FiniteLivedIntangibleAssetsGross79.980.079.680.180.380.580.380.580.279.879.884.184.187.187.187.187.187.187.187.187.187.186.086.086.085.585.585.885.80.0

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Foreign
Period End2020-12-312019-12-312018-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.4103.70.50.03.23.52.6
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Foreign
Period End2020-12-312019-12-312018-12-312014-12-31
Value0.4103.70.5
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value9286858798999598989792979589929587828091848886889085889410728262827262626272626292925
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves


Inventory
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value11310610711311610310510410210293919184828383767081767373798084851039934353533343038373638414034
Percentage of InventoryRawMaterialsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventorySuppliesNetOfReserves

us-gaap:InventorySuppliesNetOfReserves


Inventory
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value474646454545444446434242413936363331303030293030312930282822212021212020192020202019
Percentage of InventorySuppliesNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves


Inventory
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032010-12-31
Value9.48.59.09.59.74.07.29.910.01011127.47.87.96.36.66.35.45.85.55.45.45.76.77.16.76.37.37.26.36.27.26.86.4657.76.45.96.0446.17.56.4
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value14
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:DebtInstrument

us-gaap:LettersOfCreditOutstandingAmount

mtx:RevolvingFacility


Letters
Period End2021-07-042021-04-042020-12-312020-09-27
Value8.98.39.59.5
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

mtx:RevolvingFacility


Line
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282014-05-09
Value300300300300300200
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0

mtx:UncommittedShortTermBankCreditLines


Line
Period End2021-07-042021-04-042020-12-312020-09-272020-06-28
Value2525254241
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity8.48.48.514.113.9

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value400
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value4500000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive0.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value548
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value200000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-31
Value5.0
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value313334333437154.87.26.7
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:TaxCreditCarryforward

mtx:FiniteLivedTaxLossCarryForwards


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1718171517133.32.3
Percentage of OperatingLossCarryforwards56.653.449.746.750.635.621.647.9

mtx:IndefiniteLivedTaxLossCarryForwards


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value131517171724122.5
Percentage of OperatingLossCarryforwards43.446.650.353.349.464.478.452.1

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6050485561
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.30.40.30.50.6
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities0.50.80.60.91.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.41.10.80.80.8
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities2.32.21.71.41.3

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-292014-12-312013-12-31
Value35353230282427259.5
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


Restructuring
Period End2021-07-042021-04-042020-12-312020-09-272020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282013-12-312012-12-312012-09-302012-07-012011-12-31
Value2.83.03.64.14.64.65.05.37.12.32.53.96.47.68.11.20.72.33.63.9126.17.97.09.61114110.00.30.60.61.4
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value201980.0177740.0134580.0180110.0227210.0284240.0175490.0185570.0183660.0252020.0300540.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value58.0762.468.6458.5749.5758.6350.5637.6531.2527.2123.6
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant


Share
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
Value1532200.0529040.0866020.01036500.01202400.01492400.0996590.01145000.01492000.0838870.0949290.01034100.0435850.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value876210.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value56.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0

us-gaap:SharePrice us-gaap:AwardType

us-gaap:SharePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value62.12
Percentage of SharePrice100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-31
Value8900000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares


Sharebased
Period End2021-07-042021-04-042020-06-282020-03-29
Value1415700.01499400.01448700.01492800.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-312019-12-312018-12-31
Value1363400.01227600.01054300.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares0.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares us-gaap:AwardType

mtx:NonvestedStockOptions


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value487160.0438770.0365610.0400390.0431410.0353860.0319590.0373400.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares0.00.00.00.00.00.00.00.0

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1363400.01227600.01054300.0996840.01198700.01091800.0951080.01131400.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares0.00.00.00.00.00.00.00.0

us-gaap:StockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1363400.01227600.01054300.0996840.01198700.01091800.0951080.01131400.01395500.01574000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares0.00.00.00.00.00.00.00.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

mtx:NonvestedStockOptions


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value58.6163.1568.8658.9445.6157.2149.1338.01
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value57.2955.8354.0448.2141.6642.2937.4632.42
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue97.788.478.581.891.373.976.285.3

us-gaap:StockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value57.2955.8354.0448.2141.6642.2937.4632.4228.3127.1
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue97.788.478.581.891.373.976.285.30.00.0

us-gaap:ShortTermBorrowings

us-gaap:ShortTermBorrowings


Short
Period End2021-07-042020-06-282020-03-292019-12-312019-09-292019-06-302019-03-312018-12-312018-09-302018-07-012018-04-012017-12-312017-10-012017-07-022017-04-022016-12-312016-10-022016-07-032016-04-032015-12-312015-09-272015-06-282015-03-292014-12-312014-09-282014-06-292014-03-302013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-07-012012-04-012011-12-312011-10-022011-07-032011-04-032010-12-312009-12-31
Value0.51001001011031041041051081186.66.36.26.35.96.16.36.05.86.56.26.06.05.64.74.74.7535.5046.9217.0217.2267.1115.1174.4175.4945.8465.374.5174.3844.6116.892
Percentage of ShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermBorrowings us-gaap:DebtInstrument

mtx:UncommittedShortTermBankCreditLines


Short
Period End2021-07-042020-06-28
Value0.50.3
Percentage of ShortTermBorrowings100.00.3

us-gaap:TreasuryStockShares

us-gaap:TreasuryStockShares


Treasury
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1514131313131313121110
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value460
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2021-07-042021-04-042020-12-312020-09-272019-03-312018-04-01
Value1900000.01800000.01900000.02300000.02900000.01800000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2021-07-042021-04-042020-12-312020-09-27
Value4500000.04500000.05100000.05600000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value15123.24.27.94.4
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


COGS Ratio
us-gaap:ProductOrService
(None,)
C O G S  Ratious-gaap: Product Or Service
Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)
Cost Of Goods And Services Soldus-gaap: Product Or Service
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
Other Comprehensive Income Loss Net Of Taxus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'mtx:Refractories')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'mtx:SpecialtyMinerals')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'mtx:PerformanceMaterials')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:Assets
us-gaap:ConsolidationItems
(None,)
Assetsus-gaap: Consolidation Items
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:NoncurrentAssets
us-gaap:ConsolidationItems, us-gaap:StatementGeographical
('srt:ReportableGeographicalComponents', None)
Noncurrent Assetsus-gaap: Consolidation Items, us-gaap: Statement Geographical
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType
(None,)
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrentus-gaap: Retirement Plan Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components
us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument
(None,)
Repayments Of Long Term Debtus-gaap: Debt Instrument