MTZ


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

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

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

us-gaap:Liabilities
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:AssetsNoncurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:StatementGeographical
us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNi

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

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:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

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:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:Range
mtz:ChangesInContractEstimatesCostToCostMeasureOfProgressFinancialEffectPercentage

mtz:EBITDA
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

mtz:EffectOfRepurchasesOnWeightedAverageSharesOutstanding

mtz:EmployeeServiceShareBasedCompensationNetTaxBenefitDeficiencyFromVestingOfShareBasedPaymentAwards

mtz:EmployeeStockPurchasePlanWeightedAveragePerShareGrantDateFairValue
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
mtz:FinitelivedIntangibleAssetsTransferInOut
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
mtz:IndefinitelivedIntangibleAssetsTransferInOut

mtz:IntangibleAssetsAcquiredGrossExcludingGoodwill

mtz:IntangibleAssetsExcludingGoodwillPurchaseAccountingAdjustments

mtz:IntangibleAssetsGrossExcludingGoodwillTranslationAdjustments

mtz:NumberOfCustomers1
us-gaap:Range
mtz:RetainagePercentOfContractBillings

mtz:WeightedAveragePricePerSharePurchasedUnderEmployeeStockPurchasePlans

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
us-gaap:AwardType
us-gaap:CompensationExpenseExcludingCostOfGoodAndServiceSold
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:TimingOfTransferOfGoodOrService
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod

us-gaap:CostOfGoodsAndServicesSoldAmortization

us-gaap:CostOfGoodsAndServicesSoldDepreciation
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:ContingentConsiderationByType
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
us-gaap:ContingentConsiderationByType
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases
us-gaap:ContingentConsiderationByType
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
us-gaap:ContingentConsiderationByType, us-gaap:FairValueByLiabilityClass

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FinitelivedIntangibleAssetsAcquired1

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges

us-gaap:GoodwillAcquiredDuringPeriod
us-gaap:BalanceSheetLocation
us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:ContingentConsiderationByType

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:InterestRevenueExpenseNet
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityPeriodicPaymentPrincipal
us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:MinorityInterestDecreaseFromRedemptions
us-gaap:StatementEquityComponents

us-gaap:MultiemployerPlanEmployerContributionCost
us-gaap:RetirementPlanType
us-gaap:Range
us-gaap:MultiemployerPlanNumberOfEmployeesCovered

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:OperatingLeaseExpense

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities
us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:PaymentsForAdvanceToAffiliate
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:PaymentsToAcquireEquityMethodInvestments
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
us-gaap:AwardType

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsToMinorityShareholders

us-gaap:ProceedsFromRepaymentsOfOtherLongTermDebt

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
us-gaap:MajorCustomers, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfUnsecuredDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesOther
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueOther
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:TreasuryStockSharesAcquired
us-gaap:ShareRepurchaseProgram
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:ShareRepurchaseProgram
us-gaap:StatementEquityComponents

us-gaap:VariableLeaseCost

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:WriteOffOfDeferredDebtIssuanceCost

dei:EntityCommonStockSharesOutstanding
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtz:BeneficialOwnershipInterestPercentage
us-gaap:Range, us-gaap:LongtermDebtType
mtz:ConsolidatedInterestCoverageRatio

mtz:ContractRetainage

mtz:ContractWithCustomerLiabilityDeferredRevenueCurrent

mtz:DeferredTaxLiabilitiesRevenueRecognition
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtz:EquityInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
mtz:EquityInvestmentWithoutReadilyDeterminableFairValueOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtz:EquityMethodInvestmentNegativeAmount
us-gaap:GuaranteeObligationsByNature
mtz:EstimatedCostsToCompleteProjectsSecuredByBonds

mtz:FinanceLeaseAndOtherObligations

mtz:FinanceLeaseLiabilityTobePaidafterYearFour
us-gaap:Range, us-gaap:MeasurementInputType
mtz:GoodwillImpairmentTestingMeasurementInput

mtz:LesseeOperatingLeaseLiabilityTobePaidafterYearFour

mtz:LongtermDebtandFinanceLeaseObligationsIncludingCurrentMaturitiesGross
us-gaap:ProductOrService, us-gaap:LossContingenciesByNatureOfContingency
mtz:LossContingencyRangeOfPossibleLossMaximumPerEmployee

mtz:NoncontrollingInterestPercentageOfVotingInterestsAcquired
us-gaap:Ownership, us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty
mtz:ProportionatelyConsolidatedJointVentureOwnershipPercentage
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableGrossCurrent
us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsReceivableRelatedParties
us-gaap:MajorCustomers, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccruedPayrollTaxesCurrentAndNoncurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired
us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent
us-gaap:Range, us-gaap:MeasurementInputType
us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:CapitalizedComputerSoftwareGross

us-gaap:CapitalizedComputerSoftwareNet
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCostNet
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractsReceivableClaimsAndUncertainAmountsExpectedToBeCollectedWithinOneYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:ContractualObligation
us-gaap:Range, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:Range, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FairValueByAssetClass
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueFromAffiliates

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
us-gaap:BalanceSheetLocation, us-gaap:ContingentConsiderationByType
us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations
us-gaap:ContingentConsiderationByType
us-gaap:ContingentConsiderationByType, us-gaap:FairValueByLiabilityClass

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

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

us-gaap:GoodwillGross
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
us-gaap:StatementBusinessSegments
us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsMaximumExposure
us-gaap:ProductOrService, us-gaap:GuaranteeObligationsByNature, us-gaap:LossContingenciesByNatureOfContingency

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:InterestPayableCurrent

us-gaap:InventoryValuationReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:GuaranteeObligationsByNature, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:ProductOrService, us-gaap:GuaranteeObligationsByNature, us-gaap:LossContingenciesByNatureOfContingency
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases
us-gaap:CreditFacility, us-gaap:GuaranteeObligationsByNature, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:Range, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:NotesPayableFairValueDisclosure

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:PrepaidExpenseCurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ProductOrService, us-gaap:LossContingenciesByNatureOfContingency
us-gaap:SelfInsuranceReserve
us-gaap:ProductOrService, us-gaap:BalanceSheetLocation, us-gaap:LossContingenciesByNatureOfContingency
us-gaap:SelfInsuranceReserveNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:StatementEquityComponents
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
us-gaap:ShareRepurchaseProgram

us-gaap:TreasuryStockCommonShares
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockCommonValue

us-gaap:UnbilledContractsReceivable

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ValuationAllowancesAndReservesType

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Inventory Net
Current Assets
Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Proceeds From Payments For Other Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue █████▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁9.3269.3259.3119.2769.2679.2629.1919.1659.1639.1599.1339.119.1089.1069.0949.0849.0839.0799.0639.0459.048.8368.828.7958.7938.7838.7628.7118.7048.78.6728.6698.6198.6268.5928.5448.5338.5268.5168.4838.471NA7.822NANANA
us-gaap:CommonStockSharesIssued NA93.25326893.1074492.76104192.66509792.61803291.9094391.65415891.62698691.59139891.32700991.10407191.0802891.06369990.93558490.84333990.82553190.78759690.63477190.45218290.40341690.31437388.19747487.95104987.93375187.8272687.61495587.10604287.03619286.99398886.72537286.68638586.1942986.25638785.91555285.43543885.32876985.2843885.16252784.83317584.655474NA78.215189NANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStockNA93.25326893.1074492.76104192.66509792.61803291.9094391.65415891.62698691.59139891.32700991.10407191.0802891.06369990.935584NANANA90.634771NANANA88.197474NANANA87.614955NANANA86.725372NANANA85.915552NANANA85.162527NANANA78.215189NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁73.97673.846NA73.09572.77775.413NA75.93475.74775.578NA79.20180.06282.221NA82.38682.29282.157NA81.54581.26680.156NA80.44879.8382.397NA85.82486.7386.622NA85.46484.55884.094NA79.52682.47483.906NA89.31787.63483.633NA90.50790.641NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁72.50172.439NA72.13872.04574.738NA75.21775.18374.991NA78.09678.98481.15NA80.95380.92580.697NA80.46280.35180.156NA79.84579.8382.397NA81.81178.26977.345NA77.09376.74176.608NA76.19480.24980.615NA84.73282.75378.426NA76.10476.073NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA0.022527NANANANANANANANANANANANANANANANANANANANANANANANANA0.3044860.30460.061226NA0.00.1230770.0NANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▆▅▇▇▅▄▆▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▄▃▃▄▅▄▄▅▅▄▄▄▄▄▄▄▄▅▄▄▄▄▄1.040.911.561.610.790.481.341.711.590.570.421.551.020.331.980.791.010.510.670.70.3-0.03-0.950.1-0.05-0.080.260.550.410.210.540.60.460.240.480.350.370.180.10.380.540.270.50.390.190.1
us-gaap:EarningsPerShareDiluted ▆▅▇▇▅▄▇▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▄▃▃▄▅▄▄▄▅▄▄▄▄▄▄▄▄▅▄▄▄▄▄1.020.891.541.590.780.481.331.691.580.570.411.521.010.321.950.770.990.50.660.690.3-0.03-0.950.09-0.05-0.080.250.530.370.190.490.540.410.220.450.340.370.170.10.360.510.260.440.350.180.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▆▆▇█▅▄▇██▅▅▇▆▄▅▆▇▅▆▆▄▃▁▃▃▃▄▅▄▄▅▅▅▄▅▅▄▄▃▄▅▄102.82795.429153.709157.40577.56536.485122.455173.385159.95955.1465.898145.633116.18337.58957.496107.579138.76667.98593.40295.34642.039-4.968-68.26813.639-2.376-10.7446.77573.77251.77726.10669.60681.63357.30731.66862.53359.57649.43523.51814.98851.52972.92734.584NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense █▇█▇▇▅▅▅▅▅▄▄▄▄▆▄▄▅▅▅▅▄▄▄▃▄▅▅▅▄▄▄▅▃▁▂▂▁▁▁▁▁6.15.56.45.65.84.04.34.24.23.73.4143.53.43.1825.1053.43.3933.7733.7813.8863.8823.5232.9093.1662.7453.5754.3664.1044.23.263.2973.04.32.3571.0821.21.20.9930.7941.00.90.882NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▅▆▇▇▅▄▆▇▇▄▄▇▆▄█▅▆▅▅▅▄▃▁▃▃▃▄▄▅▄▄▅▄▄▄▄▄▄▄▄▅▄72.82979.859120.584118.71454.8412.973107.327121.154111.09137.5522.314125.03381.77733.753161.79765.20179.53342.78468.64354.47819.758-5.078-83.061-5.712-0.391-28.29112.46232.32739.72810.68838.11348.98228.30217.76736.14329.38528.80215.54110.01328.54144.5521.107NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▃▃▂▃▂▂▁▆▃▂▂▂▂▂▂▃▆▁█▃▃▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂0.3140.463-0.1970.394-0.178-0.168-0.2311.4860.513-0.005-0.116-0.124-0.091-0.097-0.0990.4491.664-0.3432.3580.2530.35-0.189-0.173-0.176-0.12-0.125-0.4220.139-0.1360.0450.0940.0620.1060.003-0.001-0.004-0.003-0.0020.002-0.012-0.009-0.01NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▅▆▇▇▅▄▆▇▇▄▄▇▆▄█▅▆▅▅▅▄▃▁▃▃▃▄▄▅▄▄▅▄▄▄▄▄▄▄▄▅▄73.14380.322120.387119.10854.66212.805107.096122.64111.60437.54522.198124.90981.68633.656161.69865.6581.19742.44171.00154.73120.108-5.267-83.234-5.888-0.511-28.41612.0432.46639.59210.73338.20749.04428.40817.7736.14229.38128.79915.53910.01528.52944.54121.097NANANANA
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization █▅▂▃▃▁▄█▇▂▇█▃▁1675.2321513.8591322.21380.5221341.8251226.2971434.21690.5581633.41312.01654.01681.4381366.61237.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.0-5.569NANANANANANANANANANANANANANANANANANANANANANA0.00.00.00.00.00.00.0-5.6240.00.00.00.0NANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType mtz:FourPointEightSevenFivePercentSeniorNotes,us-gaap:SeniorNotesNANANA5.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense █▆▇▆██▇▇▆▆▇▇▆▅▆▆▆▅▆▆▆▅▅▅▆▇▆▅▄▄▄▅▄▃▂▂▂▂▂▂▂▁▂▁▁84.9673.10876.02972.6984.95985.51478.91977.14670.81972.61675.74380.31167.60263.62273.10266.39770.82364.78166.40267.13167.85260.058.83363.79869.2574.0370.85159.88954.23753.32755.64158.97651.948.88539.33242.51439.59140.80938.95439.41937.5632.49937.15730.84630.983NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆▆▇█▅▄▇██▅▅▇▆▄▅▆▇▅▆▆▄▃▁▃▃▃▄▅▄▄▅▅▅▄▅▅▄▄▃▄▅▄▅▄▄102.82795.429153.709157.40577.56536.485122.455173.385159.95955.1465.898145.633116.18337.58957.496107.579138.76667.98593.40295.34642.039-4.968-68.26813.639-2.376-10.7446.77573.77251.77726.10669.60681.63357.30731.66862.53359.57649.43523.51814.98851.52972.92734.58466.13250.69924.72NA
us-gaap:IncomeTaxExpenseBenefit ▇▇▇▇▆▆▇▇▇▆▇▇▇▆▁▇█▇▇▇▆▅▆▆▆▅▆▇▆▆▇▇▇▆▇▇▆▆▆▆▇▆▇▆▆27.06229.31740.78440.5220.7380.42321.7743.30339.73612.03334.07325.09135.78211.126-103.22843.37855.43427.35837.45338.81617.601-2.18.6696.1971.444-4.35218.75828.04219.7149.91626.7231.69821.77612.34824.85123.47819.6399.3486.42719.69928.44213.48827.70120.69810.159NA
us-gaap:IncomeTaxesPaidNet NANA52.5610.6221.756-0.28732.74634.08536.582.837-8.7141.23914.763-28.7381.120.974.8611.77244.2018.014.8362.295-3.3050.4123.9561.47330.55216.52217.97311.92829.7828.09733.388.24521.74918.32317.0121.8849.2339.9217.6940.9552.2350.674NANA
us-gaap:InterestPaidNet ▁▅▁▆▂▅▂█▄▇▄█▃▅▃▅6.71221.6897.91824.05211.56721.47911.40130.46816.88226.2215.44229.7214.71321.35511.99421.42NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▅▅▇▇▅▄▆▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▃▃▃▄▅▄▄▄▅▄▄▄▄▄▄▄▄▅▄▄▄▄▃75.45165.649113.1116.49157.00536.23100.9128.596119.7143.11231.9120.66680.49226.56160.863.75281.66840.9753.656.27724.088-2.692-76.77.618-3.7-6.26321.145.27132.0516.02341.546.13834.94118.3736.326.82130.09214.1728.55931.84244.49421.10638.5130.00614.6017.411
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▃▃▂▃▂▂▁▆▃▂▂▂▂▂▂▃▆▁█▃▃▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂0.3140.463-0.1970.394-0.178-0.168-0.2311.4860.513-0.005-0.116-0.124-0.091-0.097-0.0990.4491.664-0.3432.3580.2530.35-0.189-0.173-0.176-0.12-0.125-0.40.139-0.1360.0450.10.0620.1060.0030.0-0.004-0.003-0.0020.002-0.012-0.009-0.01-0.08-0.005-0.04NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▄75.451NANANA57.005NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA30.09214.172NANA44.49421.106NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▄75.451NANANA57.005NANANANANANANANANANANANANANANANANANANANANANA45.29132.11816.10141.5846.21735.0218.44736.41826.89930.16914.258.63831.92444.57121.355NANANANA
us-gaap:NonoperatingIncomeExpense ▆▅▆▅▆▅▅▄▄▄▄▄▄▅▆▅▄▄▄▅▄▆▆▄▅▄▅▅▅▅▅▅▄▅▄▃▅▅▁▄█▄▄▄▄14.0892.5968.996.61210.5271.3422.278-8.002-4.812-3.507-0.196-0.323-0.7883.0898.8884.677-0.146-0.429-6.0080.971-1.52413.35611.821-6.7022.3530.0072.6921.4162.0511.9552.9052.778-0.3220.826-0.028-8.8150.360.454-28.954-0.59329.5650.165-1.3550.228-0.588NA
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▅█▆▆▅▁▇▄▄▄▄▆▆▇-3.46513.8394.2962.839-1.325-22.9616.279-7.108-8.732-5.462-7.9273.1372.9377.716NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName mtz:WahaJVs▅█▆▆▅▁▇▄▄▄▄▆▆▇-3.713.13.91.9-1.3-23.06.3-7.1-8.7-5.5-7.93.12.97.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅█▇▆▅▁▇▄▄▄▄▆▆▇-2.62214.217.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193NANANANANANANANANANANANA-10.117-12.9447.678-5.335-3.3882.844-6.639-0.603-0.198NANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▅█▇▆▅▁▇▄▄▄▄▆▆▇-2.62214.217.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:Parent▅█▇▆▅▁▇▄▄▄▄▆▆▇-2.62214.217.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▅▅▇▇▅▄▆▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▃▃▃▄▅▄▄▄▅▄▄▄▄▄▄▄▄▅▄▄▄▄75.76566.112112.9116.88556.82736.062100.7130.082120.22343.10731.8120.54280.40126.463160.764.20183.33240.62755.956.5324.438-2.881-76.9377.442-3.82-6.38822.15745.4131.91416.06841.59546.235.04718.37336.3426.81730.08914.178.56131.8344.48521.09638.43130.00114.561NA
us-gaap:Revenues █▇▆▇▆▅▇██▆██▆▅▆█▇▄▅▆▄▃▄▄▄▃▄▅▄▃▄▅▃▃▃▄▃▂▂▃▂▂▂▂▁▁1962.6581775.4241636.81698.2791569.2971416.6041709.32016.6181939.0061518.341917.61977.2271617.8041396.8341602.91955.7521890.181158.1841341.91586.1811232.404974.2251027.41111.011066.6291003.2681231.31309.5961104.556964.0291159.11269.385977.624918.648932.31067.3992.244778.476774.23865.313750.942618.492730.74631.947495.113450.231
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▇▆▆▆▆▆▆▅▆▆▅▅▄▄▃▃▃▃▃▃▃▃▃▄▄▄▃▃▃▂▂▂▁▁▁▁▁▁5901.6285538.3035227.8495201.7494989.9854893.5484997.0064858.6524797.3714860.3934439.9534974.8064582.1574154.3484066.5763942.1753823.4853115.8343183.1323214.0463123.9432986.6282940.1973245.7863356.9033351.0163563.983470.1263395.873013.4072919.6382954.3382820.9062540.8662407.9342195.92227.3222070.2922081.1452084.3521996.319NA1655.828NANANA
us-gaap:Liabilities █▇▇▇▇▇▇▆▇▇▆▇▆▅▅▅▅▃▄▄▄▃▃▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁3740.2593449.3283222.3243324.6043239.1493203.7353205.3153179.3483246.0333426.6613047.9293484.9863151.7592780.1512633.2232639.132590.3231968.0282079.4982184.4662153.7272042.7671996.8062221.3022329.7522317.5362415.9052341.2392304.5561976.561898.581975.2511900.5931655.2111545.9991379.9341411.6521241.2391269.9381215.3361156.619NA1002.666NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▆▆▆▆▆▆▅▆▆▅▅▄▄▃▃▃▃▃▃▃▃▃▄▄▄▃▃▃▂▂▂▁▁▁▁▁▁5901.6285538.3035227.8495201.7494989.9854893.5484997.0064858.6524797.3714860.3934439.9534974.8064582.1574154.3484066.5763942.1753823.4853115.8343183.1323214.0463123.9432986.62940.1973245.7863356.9033351.0163563.983470.1263395.873013.4072919.6382954.3382820.9062540.8662407.9342195.92227.3222070.2922081.1452084.3521996.319NA1655.828NANANA
us-gaap:StockholdersEquity ██▇▇▆▆▆▅▅▄▄▅▄▄▄▄▃▃▂▂▂▂▂▂▂▂▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁2158.3622084.9092001.9221873.3451746.7111685.511787.221674.6011548.1211431.6111389.8981487.5781428.0321371.741430.7991295.4531226.0191142.3271096.5311024.835965.724940.229939.571020.491022.9821029.1911143.6611124.0491086.6161031.8311016.089974.212915.441880.889857.172815.923815.623829.003811.155868.965839.637NA653.081NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▇█▇▇▆▆▆▆▆▆▆█▇▅▅▅▅▃▃▃▃▃▂▃▃▃▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁2408.2892550.4242359.0152334.0752137.0482079.7792173.5592198.6962127.0122262.0592168.9892668.9622281.771907.5951852.3661747.7471790.7071267.0991402.4861422.4271321.8421198.51132.9021238.3141354.2651358.1731531.7511573.9521489.6521357.9361305.9831332.3161272.2421145.7491047.0681025.5621059.588823.728822.51857.352788.54NA721.674NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄█▇▄▂▂▂▂▂▂▁▂▁▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▄▃▃▂237.271512.407423.118238.17448.63871.66371.42743.09559.17643.19427.42268.48420.68440.23540.32643.82218.2315.68738.7679.4278.7583.8854.9847.1544.75528.69124.0597.06715.9249.26122.9272.84813.295109.24726.38210.47216.81420.13120.2816.36378.456197.991177.604119.77269.032NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▄█▇▄▁▂▂▁▁▁▁237.271512.407423.118238.17448.63871.66371.42743.09559.17643.19427.422NANANA40.326NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▂▂▂▂▂▂▂▆▆▇▆█▇▅▅▅▅▃▃▃▃▃▂▃▃▃▄▄▄▃▃▄▃▂▂▂▂▁▁▂▁865.235876.715784.488917.099927.764796.12850.3261953.341841.7681986.3351923.972368.5972077.4871705.1261598.0151534.791569.3921086.1081156.0311215.9541091.025970.9911.1061023.6631126.9271132.8321303.5521389.9031288.6721195.6031134.3371225.1221115.991902.426877.131873.102899.131667.064664.629711.24583.062NA444.363NANANA
us-gaap:InventoryNet ▄▄▄▃▆▆▅▆█▇▇█▅▃▃▃▅▅▆▆▇▅▄▄▅▅▆▆▇▄▂▁▁▂▃▄▆▅▄▅▄87.35592.67789.64585.541104.893106.586100.069106.69126.965121.648113.709125.815100.23180.48376.99284.4695.54199.652111.031108.444115.79999.40590.59990.512103.299100.379112.804105.038115.62789.14670.18563.25567.01570.39583.93991.037107.795100.82788.99296.89289.433NA57.483NANANA
us-gaap:OtherAssetsCurrent ▄▄▂▁▄▆█▅▅▆▄▄▃▁▂▂▁▁▅▅▆█▇44.81550.73631.3929.01745.72861.30275.16955.06955.00758.23447.3347.29940.15227.67435.76330.84327.27429.78555.10956.33661.18673.76868.19NANANA44.463NANANANANA17.24.9677.1996.43511.60311.22315.93513.25814.486NA13.058NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesNANA1395.4NANANA1359.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross NA2275.52169.72127.62059.11981.61923.51836.81789.11696.41613.51570.21536.01489.01455.61426.11347.61235.41182.21163.71143.61103.91086.91138.61139.31099.31088.71060.71035.7899.3863.4857.0797.7686.2631.3547.3527.2495.1482.5NANANA350.2NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovementsNA43.740.540.840.436.935.835.034.133.030.329.628.426.626.725.726.224.024.222.322.021.921.721.021.120.519.919.219.017.618.018.117.915.515.413.513.412.512.5NANANA11.1NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNA23.026.129.824.963.626.131.230.226.120.125.126.215.112.58.912.318.29.514.523.713.710.810.814.615.412.017.218.316.911.0NANANA6.6NANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNA228.3221.6216.3211.1205.9197.3181.3174.8172.1166.7160.3157.3156.9149.9149.6148.9147.0146.1142.9140.0140.3136.9135.6130.3126.9126.1118.1114.4108.0102.5105.499.7100.592.890.283.480.677.1NANANA59.9NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNA8.46.06.06.04.94.94.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.84.84.84.84.84.64.64.64.7NANANA4.7NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:MachineryAndEquipmentNA1972.11875.51834.71776.71670.31659.41584.71545.41460.61391.81350.61319.51285.81261.91237.31155.61041.6997.8979.4953.3923.4912.9966.6968.7931.9926.1901.6879.4752.2727.1728.7675.3565.3518.3439.0425.8397.4388.2NANANA274.5NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NA1251.01187.41133.41086.91044.31017.7973.9936.3896.9865.7833.8796.6779.2749.1734.7699.1664.9633.1609.2584.5555.9528.2551.6524.5491.3465.6446.3417.0389.7375.3352.7327.2303.0280.9259.8244.6230.1215.9NANANA169.4NANANA
us-gaap:AmortizationOfIntangibleAssets █▄▄▄▄▂▃▁▁▁▁▁▂▁▂▂▁▁▂▁▂▂▂▂▂▂▃▂▂▁▂▂▂▁20.011.210.511.29.87.48.84.74.74.85.25.25.44.95.96.04.94.15.65.25.35.36.96.97.37.38.16.65.84.66.05.85.34.2NANA2.92.8NANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet NA1024.509982.328994.193972.177937.309905.835862.923852.804799.479747.808736.447739.425709.806706.506691.43648.456570.479549.084554.513559.057548.0558.667586.993614.826608.019623.118614.359618.672509.585488.132504.313470.544383.174350.355287.529282.561264.968266.583253.375240.636NA180.786NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical country:USNA1000.0959.5971.4949.1911.5874.7831.1819.8764.1707.4697.5698.6658.1649.5629.2583.8502.2475.3476.2469.9453.8464.6482.4498.1491.8494.1NANANA436.9NANANA337.5NANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical us-gaap:NonUsNA22.222.822.823.125.831.131.833.135.440.438.940.851.757.062.264.768.373.878.389.294.294.1104.6NANA129.0NANANA51.2NANANANANANANANANANANANANANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures █▇▄▂▁▁▁248.0242.0220.0205.0197.0195.0196.0NANANANANANANANANANANANANANA20.416.7NANANANANA19.3NA15.8NANANANANANANANANANANANANANANA
us-gaap:Goodwill █▇▇▇▇▇▇▆▆▆▅▆▆▆▆▆▅▄▄▄▄▄▄▅▅▅▅▄▄▃▃▃▃▂▂▁▁▂▂▂▂1331.6991262.7181243.0341231.7171227.4051221.1471221.441140.8741144.1761140.5181100.351149.7951146.5991145.4341137.7381135.451040.302996.383995.874997.199998.089991.975988.5111064.8221073.111070.2941082.4661000.024983.133912.885899.364891.266860.207824.014820.341724.347724.596810.586807.85801.392794.949NA613.369NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNames▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇█▁▁██34.534.534.534.534.534.534.534.534.534.534.534.534.534.534.534.534.534.534.534.834.834.834.834.834.834.834.834.834.834.834.834.834.934.734.928.328.335.335.3NANANA35.3NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill █▃▂▂▃▃▃▂▂▃▂▂▂▂▂▃▂▂▂▂▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁521.033225.566184.043191.673202.165200.788211.528184.938190.149193.192169.37177.211181.515187.442191.142195.454185.932176.031179.711186.515192.583197.503199.379218.761230.076236.231250.373222.212230.592171.562165.606172.833168.701132.885137.1102.229105.091115.107117.946122.199126.101NA78.19NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA149.5NANANA104.1NANANA60.9NANANA79.0NANANA70.6NANANA91.2NANANA122.3NANANA71.4NA74.266.870.936.138.941.944.7NANANA36.3NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:ContractualRights▇▇▇███▁58.861.063.264.867.168.80.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelatedIntangibleAssets█▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▁▁▁367.8119.579.485.092.789.295.368.372.676.154.459.464.268.970.674.267.959.563.268.172.577.280.887.694.7101.3109.577.384.068.060.766.6NANA61.4NANANA38.2NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssets█▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂59.910.66.97.47.98.38.86.87.27.76.56.97.27.68.48.87.37.17.48.09.09.410.411.011.612.012.812.112.510.510.711.2NANA9.5NANANA6.4NANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:US█▄▄▄▄▄▄▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁1800.01400.01400.01400.01400.01400.01400.01300.01300.01300.01200.01200.01200.01200.01200.01200.01100.01100.01100.01100.01100.01100.01100.01100.01100.01100.01100.0NANANA1000.0NANANA900.0NANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical us-gaap:NonUs▁▁▁▁▁▁▁▂▂▂▂▄▄▄▄▄▄▄▄▄▄▄▄█48.249.450.550.351.451.456.462.163.162.361.5108.4107.0109.5112.8114.3110.6108.2107.8111.1113.6113.7107.3193.9NANA227.7NANANA92.9NANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇▆▆▆▇▇███▇▁215.554162.359176.573187.531198.844210.637229.903233.423241.493223.1060.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ██▇▇▆▆▆▆▆▆▆▆▆▅▅▄▄▃▂▂▂▁▂▄▂▂▂▂▂▂▂▂▁▁▁▁▂▂▂▁▁323.819312.727282.856262.56252.346243.888254.741237.798241.737242.039253.436242.391232.848204.071178.824172.094158.088105.84255.97753.39252.37250.65760.738136.89684.62678.29976.27259.57973.82161.43960.55353.6141.69647.37445.42247.03855.48655.90366.25634.98229.885NA30.84NANANA
 us-gaap:EquitySecuritiesFvNi us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:FinancialInstrument mtz:AVCT,us-gaap:CommonStock█▆▆▁19.017.017.011.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▆▆▅▅▆▅▅▆▆▅▇█▅▄▂▄▃▁▂▃▃▂▂▂▃▃▄▄▄▃▃▄▂▂▃▃▃▂▁▂▁629.91632.088571.269582.849630.456533.509535.029625.008633.245558.696669.712744.305544.398457.832377.954457.213429.623294.284363.668435.652440.972363.142348.543376.836434.436393.456485.347481.84494.09440.152424.917475.742383.372360.649394.06431.864435.925327.286306.996335.97294.775NA196.363NANANA
us-gaap:AccruedLiabilitiesCurrent ▇█▆▅▅▄▃▄▅▄▄▄▆▄▅▄▄▄▃▃▂▁▁▂▂▂▂▂▁▁▁▁207.571236.753187.647169.748163.629125.77115.581139.883158.318130.095133.033146.252187.394137.063148.971128.769134.801126.686112.291118.3585.03559.24569.36981.36389.66592.84789.34382.05469.40160.58171.46564.645NANA45.814NANANANANANANANANANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▃▄▃█▇▂▂▁▂▃▃▂▄▂▂238.853259.488228.388368.184338.23204.284206.18183.5221.5243.7231.6197.2251.1222.4206.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ██▇▇▇▆▅▆▆▆▆▆▆▄▄▄▃▃▃▄▃▃▂▃▃▃▄▃▃▃▃▃▃▂▂▂▂▁▁▁▁1638.9911632.91415.1991514.1541523.3911260.0331219.1261334.5061391.1531262.6521283.6111372.4971252.7771047.34963.8271002.151928.731813.26839.99942.365866.434811.7752.789787.41852.968881.485980.848910.874868.474820.389825.546882.229798.608691.729705.702749.5719.74578.591580.247577.977553.198NA486.544NANANA
us-gaap:OperatingLeaseLiabilityCurrent █▇▇▇▇██▇▇▇▁85.57369.18472.48174.43978.04480.07681.56179.1577.62973.2790.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ██▆▅▅▅▆█▇▆▆▇▆▅▅█▆▇▅▃▂▃▃▂▂▃▅▁▁▂▂▃▂▃▂▂▁▂▂▁▁103.407101.6874.98871.20368.26771.46674.784100.54188.83173.48580.93785.48984.89972.06265.45598.17173.76188.04670.84640.54534.29247.39143.45934.34135.03343.37366.52722.97617.9424.58824.94539.43635.03442.57429.69928.40723.99830.89932.38120.66222.531NA21.78NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesNANA1024.5NANANA978.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▇▅▅▅▅▆▆▅▆▇▆█▇▆▆▅▆▄▄▄▄▄▄▅▅▅▅▅▅▃▃▃▃▃▂▁▁▁▁▁▁1420.461170.4191157.6321164.4571115.8391297.3421314.031221.1271250.8121539.2941324.2231688.821532.9781343.5491280.7061192.3111313.86893.362961.379950.641998.44938.7945.4641098.5851136.7831078.0191061.1591088.2891088.666841.335765.425779.92806.497685.39546.323410.561467.2426.838460.725426.865400.015NA394.151NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▇▇▅▅▆▅▄▅▅▄▂▁▁323.95304.006302.938301.216267.525276.06296.326277.439256.519274.9263.687258.905206.411197.275204.518NANANA166.6NANANA169.6NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▄▅▄▄▅▅▅▅▄▃▃▃▃▃▃██▆█▅▅▄▅▅▅▅▅▅▅▆▆▅▅▅▅▁▁▁▁▁▁3.0074.0663.6033.84.1254.3034.4714.7033.2172.1212.1262.2422.3662.4572.5547.5927.1435.4797.1034.7454.4923.6323.8213.9944.1694.2894.4144.8384.6985.0164.9694.8754.8724.7664.7630.0430.0470.050.0520.0510.063NA0.081NANANA
us-gaap:OtherLiabilitiesNoncurrent ▇██▇▇██▆▆▇▆▆▅▇▆▆▃▃▄▃▃▃▂▂▂▂▂▂▂▂▂▂▁▂▁▂▂▁▁▁▁214.081235.032230.049219.138198.859226.859221.28186.993178.851195.965176.408164.764159.593191.987184.172170.20394.89886.37399.77498.41590.48277.36168.11965.07263.10266.88866.90745.97843.94940.92940.35642.55638.60639.31638.87440.31941.42136.52631.78925.30524.231NA24.789NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇▅▆▆▇▇▇██▇▁142.777106.971116.506125.639133.535143.441154.553159.283168.698153.850.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▆▁█▇42.927.349.246.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree █▁▅▅30.017.325.423.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour █▁▆▅18.610.816.215.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA10.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA20.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ██▇▇▆▆▆▅▅▄▄▅▄▄▄▄▃▃▂▂▂▂▂▂▂▂▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁2158.3622084.9092001.9221873.3451746.7111685.511787.221674.6011548.1211431.6111389.8981487.5781428.0321371.741430.7991295.4531226.0191142.3271096.5311024.835965.724940.229939.571020.491022.9821029.1911143.6611124.0491086.6161031.8311016.089974.212915.441880.889857.172815.923815.623829.003811.155868.965839.637NA653.081NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ██▇▇▆▆▆▆▅▄▄▅▄▄▄▄▃▃▃▂▂▂▂▂▂▂▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁2161.3692088.9752005.5251877.1451750.8361689.8131791.6911679.3041551.3381433.7321392.0241489.821430.3981374.1971433.3531303.0451233.1621147.8061103.6341029.58970.216943.861943.3911024.4841027.1511033.481148.0751128.8871091.3141036.8471021.058979.087920.313885.655861.935815.966815.67829.053811.207869.016839.7NA653.162NANANA
us-gaap:CommonStockValue █████▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁9.3269.3259.3119.2769.2679.2629.1919.1659.1639.1599.1339.119.1089.1069.0949.0849.0839.0799.0639.0459.048.8368.828.7958.7938.7838.7628.7118.7048.78.6728.6698.6198.6268.5928.5448.5338.5268.5168.4838.471NA7.822NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ███▇▆▆▅▅▅▄▄▄▃▃▃▅▄▄▄▃▃▃▂▂▂▁▁▃▃▇▆▆▅▅▅▄841.19840.567837.453829.495821.584814.425809.753804.487799.162793.748789.009788.473783.825779.449775.387800.297796.065791.91788.914785.879781.251775.717769.996767.881764.661761.168756.688781.4776.301827.863822.836819.073809.336809.082803.166798.108NANA792.096NANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▆▆▆▅▅▅▅▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁1974.6571899.2061833.5571720.4351603.9441546.9391510.7091409.7931281.1981161.4871118.3751086.434965.768885.277857.154696.331632.579550.911509.941456.35400.073375.986378.678455.441447.824451.524457.788435.208389.937357.887341.865300.366254.226219.285200.915164.574137.753107.66193.48984.9353.087NA-12.512NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▃▂▁▁▁▃▂▃▄▄▅▄▄▄▄▄▄▄▂▃▃▃▄▅▄▆▇█▇▇█▇████████-79.856-77.234-91.444-98.906-101.129-98.963-75.706-82.117-74.675-66.056-60.494-50.867-55.234-56.519-63.712-64.686-66.135-64.0-65.814-80.866-79.067-74.7-72.351-66.054-52.723-56.032-34.004-23.887-10.943-18.621-13.286-9.898-12.742-6.104-5.501-5.303-7.866-6.577-7.946-9.399-6.098NA-6.156NANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedGainLossNetCashFlowHedgeParentNANA-27.172NANANA-10.021NANANA5.002NANANA-0.861NANANA-1.336NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustmentNANA-64.272NANANA-65.685NANANA-65.496NANANA-62.851NANANA-64.478NANANA-67.063NANANA-28.716-18.599-5.655-13.333-7.998-3.945-6.88-0.929-0.1060.275NANA-2.029NANANA-0.399NANANA
us-gaap:MinorityInterest ▄▅▄▄▅▅▅▅▄▃▃▃▃▃▃██▆█▅▅▄▅▅▅▅▅▅▅▆▆▅▅▅▅▁▁▁▁▁▁3.0074.0663.6033.84.1254.3034.4714.7033.2172.1212.1262.2422.3662.4572.5547.5927.1435.4797.1034.7454.4923.6323.8213.9944.1694.2894.4144.8384.6985.0164.9694.8754.8724.7664.7630.0430.0470.050.0520.0510.063NA0.081NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▇▆█▆▇▃▄▃▃▂▂▂▁▁6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.182NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders NANA0.00.719NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterestNANA0.00.719NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▅▅▆▅▄▄▇▃█▃▃▄▃▆▁▅▄▄▃▃▄▄▄▄▆▄▄▃▄▄▃▄▄▅▃▄▄▃▃▄▄▄92.178257.164224.796215.956293.236203.266108.88489.933398.268-46.807503.1863.553-60.28483.501-22.362266.618-242.166154.17378.45298.65312.58815.9106.81194.74947.027118.826241.99225.775.713-20.39475.411110.424-17.24931.81657.465133.82-62.59543.44546.223-45.791-44.92750.321117.36272.406NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▆▇▇▆▆▆▇▇▆▇▇▆▇▇▆▆▆▇▇▇▇█▇▆▇▅▇▅▇▇▆▅▇▅▇█▇▇▇▆▇▇▇-541.502-134.612-39.428-40.504-77.933-58.74-118.299-20.722-11.599-111.203-39.662-31.042-80.239-30.856-23.319-100.137-79.673-69.619-46.96-34.189-47.252-12.6241.75-56.222-63.821-50.407-196.557-21.563-164.032-57.11-10.161-72.185-148.769-32.096-163.42-21.47573.481-16.581-12.972-30.784-71.686-31.12-56.545-16.565NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▅▅▅▃▄▆▅▂▇▁▆▆▅▆▄█▄▅▅▆▅▄▅▅▅▅▅▆▆▅▅▆▆▆▄▅▅▅▅▅▅▅▅174.029-33.191-0.62314.568-238.608-145.22437.412-85.218-370.598173.773-504.01875.2121.182-53.45842.533-141.001324.417-107.794-1.857-63.67539.694-3.648-151.76-36.792-7.538-62.83-28.303-12.18994.85364.314-45.265-49.15269.72883.682121.583-118.167-14.098-27.062-29.60914.591-2.9251.154-2.993-5.124NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁▆██▅▅▆▅▅▅-275.13689.289184.944189.536-23.0250.23628.332-16.08115.98215.772NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▆▄▅▆▄▄▅▆▄▅▅▇▅▄▁▅█▅▅▅▅▄▅▅▄▄▅▄▅▅▄▅▅▄18.244-19.838-0.76728.522-7.961-12.61413.61422.736-15.0890.8994.80451.5777.071-7.243-73.91115.60468.1818.403-2.596-2.4945.524-4.36913.0010.95-3.333-6.6939.462-6.8667.8793.281-2.9062.3310.735-3.626NANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization █▇▆▆▅▄▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁107.490.587.282.667.560.561.31155.19659.94459.03156.45254.86351.67649.9449.66550.10145.37942.90442.66642.58440.65739.00841.61442.19643.25442.59842.45641.74736.75533.49437.81737.75633.60231.75326.83422.82121.99220.95421.67619.85818.58515.10914.78314.79614.212NA
us-gaap:IncreaseDecreaseInAccountsReceivable ▄▅▃▄▅▄▃▅▃▅▁▇▇▅▅▄█▄▄▅▅▅▄▄▄▃▂▅▄▅-94.70361.993-137.174-10.444108.583-48.337-112.33116.292-148.47831.455-428.692292.177374.47697.2483.108-54.435462.541-73.723-56.171123.218124.3854.992-109.942-92.949-9.378-150.006-290.723114.102-20.22533.073NANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInInventories ▃▄▄▁▅▃▄▁▅▃▃█▅▄▄▃▃▁▄▃▆▅▄▂▄▂▂▃▇▆▅▄▃▂▃▂▅▄▃▅▇▅▃▆-4.516-0.651-2.259-20.27410.561-5.932-2.758-21.5589.955-9.69-7.65928.4757.8990.651-2.608-5.284-6.891-21.4043.332-7.55417.3649.090.05-13.052.922-12.278-14.932-9.58723.82713.3137.003-3.36-4.957-12.167-5.512-16.6896.969-0.216-7.8238.94319.3238.708-5.61414.929NANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▅▅▆▅▄▄▇▃█▃▃▄▃▆▁▅▄▄▃▃▄▄▄▄▆▄▄▃▄▄▃▄▄▅▃▄▄▃▃▄▄▄92.178257.164224.796215.956293.236203.266108.88489.933398.268-46.807503.1863.553-60.28483.501-22.362266.618-242.166154.17378.45298.65312.58815.9106.81194.74947.027118.826241.99225.775.713-20.39475.411110.424-17.24931.81657.465133.82-62.59543.44546.223-45.791-44.92750.321117.36272.406NANA
us-gaap:NetIncomeLoss ▅▅▇▇▅▄▆▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▃▃▃▄▅▄▄▄▅▄▄▄▄▄▄▄▄▅▄▄▄▄▃75.45165.649113.1116.49157.00536.23100.9128.596119.7143.11231.9120.66680.49226.56160.863.75281.66840.9753.656.27724.088-2.692-76.77.618-3.7-6.26321.145.27132.0516.02341.546.13834.94118.3736.326.82130.09214.1728.55931.84244.49421.10638.5130.00614.6017.411
us-gaap:ProfitLoss ▅▅▇▇▅▄▆▇▇▅▄▇▆▄█▅▆▄▅▅▄▃▁▃▃▃▄▅▄▄▄▅▄▄▄▄▄▄▄▄▅▄▄▄▄75.76566.112112.9116.88556.82736.062100.7130.082120.22343.10731.8120.54280.40126.463160.764.20183.33240.62755.956.5324.438-2.881-76.9377.442-3.82-6.38822.15745.4131.91416.06841.59546.235.04718.37336.3426.81730.08914.178.56131.8344.48521.09638.43130.00114.561NA
us-gaap:ShareBasedCompensation ▇▆█▆▇▃▄▃▃▂▂▂▁▁6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.182NANANANANANANANANANANANANANANANANANANANANANANANANA0.961NANANA1.013NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▆▇▇▆▆▆▇▇▆▇▇▆▇▇▆▆▆▇▇▇▇█▇▆▇▅▇▅▇▇▆▅▇▅▇█▇▇▇▆▇▇▇-541.502-134.612-39.428-40.504-77.933-58.74-118.299-20.722-11.599-111.203-39.662-31.042-80.239-30.856-23.319-100.137-79.673-69.619-46.96-34.189-47.252-12.6241.75-56.222-63.821-50.407-196.557-21.563-164.032-57.11-10.161-72.185-148.769-32.096-163.42-21.47573.481-16.581-12.972-30.784-71.686-31.12-56.545-16.565NANA
us-gaap:PaymentsToAcquireProductiveAssets ▅▅▃▅█▇▄▃▂▄▅▅▇▂▄▃▃▃▃▂▅▁▁▂▃▂▂▂▃▄▂▃▅▂▃▂▁▁48.97148.05830.02150.9772.16160.59441.37827.6423.05934.39646.20646.21765.45222.54540.08226.47727.95228.90128.06425.15750.59313.313.64422.33528.77119.6618.29223.39632.01235.55424.87730.02945.53125.85129.35521.84114.39314.097NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▅▅▅▃▄▆▅▂▇▁▆▆▅▆▄█▄▅▅▆▅▄▅▅▅▅▅▆▆▅▅▆▆▆▄▅▅▅▅▅▅▅▅174.029-33.191-0.62314.568-238.608-145.22437.412-85.218-370.598173.773-504.01875.2121.182-53.45842.533-141.001324.417-107.794-1.857-63.67539.694-3.648-151.76-36.792-7.538-62.83-28.303-12.18994.85364.314-45.265-49.15269.72883.682121.583-118.167-14.098-27.062-29.60914.591-2.9251.154-2.993-5.124NANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.801119.4270.00.00.05.652115.50170.13737.43190.881.5520.00.00.00.00.00.00.00.00.016.73983.2610.00.00.00.00.00.0NANA0.039.913NANA73.05NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:SubsequentEventType mtz:FourPointFivePercentSeniorNotes,us-gaap:SeniorNotes,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9326000.09325000.09311000.09276000.09267000.09262000.09191000.09165000.09163000.09159000.09133000.09110000.09108000.09106000.09094000.09084000.09083000.09079000.09063000.09045000.09040000.08836000.08820000.08795000.08793000.08783000.08762000.08711000.08704000.08700000.08672000.08669000.08619000.08626000.08592000.08544000.08533000.08526000.08516000.08483000.08471000.07822000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.20.30.30.30.30.30.30.30.40.40.40.40.40.40.40.5

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9393929292919191919191919190909090909090908887878787878786868686868585858585848478
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value9393929292919191919191919190908887868585787575
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value73737372757575757980828282828181808079828586868584847982838987839090
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value72727272747575747878818080808080807979828178777776767680808482787676
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value22527.0304490.0304600.061226.00123080.00
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.00.0100.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.040.911.561.610.790.481.341.711.590.570.421.551.020.331.980.791.010.510.670.70.3-0.03-0.950.1-0.05-0.080.260.550.410.210.540.60.460.240.480.350.370.180.10.380.540.270.50.390.190.1
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.020.891.541.590.780.481.331.691.580.570.411.521.010.321.950.770.990.50.660.690.3-0.03-0.950.09-0.05-0.080.250.530.370.190.490.540.410.220.450.340.370.170.10.360.510.260.440.350.180.1
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6.15.56.45.65.84.04.34.24.23.73.4143.53.43.1825.1053.43.3933.7733.7813.8863.8823.5232.9093.1662.7453.5754.3664.1044.23.263.2973.04.32.3571.0821.21.20.9930.7941.00.90.882
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.30.30.40.30.40.30.30.20.20.20.20.20.20.20.30.20.20.30.30.20.30.40.30.30.30.40.40.30.40.30.30.20.40.30.10.10.10.10.10.10.10.1

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value7279120118541210712111137221258133161657942685419-5.078-83.061-5.712-0.391-28.29112323910384828173629281510284421
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.74.57.47.03.50.96.36.05.72.51.26.35.12.410.13.34.23.75.13.41.6-0.5-8.1-0.5-0.0-2.81.02.53.61.13.33.92.91.93.92.82.92.01.33.35.93.4

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value314000.0463000.0-197000.0394000.0-178000.0-168000.0-231000.01486000.0513000.0-5000.0-116000.0-124000.0-91000.0-97000.0-99000.0449000.01664000.0-343000.02358000.0253000.0350000.0-189000.0-173000.0-176000.0-120000.0-125000.0-422000.0139000.0-136000.045000.094000.062000.0106000.03000.0-1000.0-4000.0-3000.0-2000.02000.0-12000.0-9000.0-10000.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.0-0.00.0-0.0-0.0-0.00.10.0-0.0-0.0-0.0-0.0-0.0-0.00.00.1-0.00.20.00.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.00.00.00.00.00.0-0.0-0.0-0.0-0.00.0-0.0-0.0-0.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value7380120119541210712211137221248133161658142715420-5.267-83.234-5.888-0.511-28.41612323910384928173629281510284421
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.74.57.47.03.50.96.36.15.82.51.26.35.02.410.13.44.33.75.33.51.6-0.5-8.1-0.5-0.0-2.81.02.53.61.13.33.92.91.93.92.82.92.01.33.35.93.4

Cost Of Goods And Service Excluding Depreciation Depletion And Amortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value16751513132213801341122614341690163313121654168113661237
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues85.485.380.881.385.586.683.983.884.286.486.385.084.588.6

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0-5569000.00000000-5624000.00000
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.00.00.00.00.00.00.00.0100.00.00.00.00.0
Percentage of Revenues0.0-0.30.00.00.00.00.00.00.0-0.60.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

mtz:FourPointEightSevenFivePercentSeniorNotes, us-gaap:SeniorNotes


Gains
Period End2020-09-30
Value5600000.0
Percentage of GainsLossesOnExtinguishmentOfDebt-100.6
Percentage of Revenues0.3
Percentage of Revenues mtz:FourPointEightSevenFivePercentSeniorNotes us-gaap:SeniorNotes0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value847376728485787770727580676373667064666767605863697470595453555851483942394038393732373030
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.34.14.64.35.46.04.63.83.74.83.94.14.24.64.63.43.75.64.94.25.56.25.75.76.57.45.84.64.95.54.84.65.35.34.24.04.05.25.04.65.05.35.14.96.3

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1029515315777361221731595565145116375710713867939542-4.968-68.26813-2.376-10.7446735126698157316259492314517234665024
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.25.49.49.34.92.67.28.68.23.63.47.47.22.73.65.57.35.97.06.03.4-0.5-6.61.2-0.2-1.13.85.64.72.76.06.45.93.46.75.65.03.01.96.09.75.69.18.05.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value27294040200.4232143391234253511-103.228435527373817-2.18.6696.1971.444-4.3521828199.916263121122423199.3486.427192813272010
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.41.72.52.41.30.01.32.12.00.81.81.32.20.8-6.42.22.92.42.82.41.4-0.20.80.60.1-0.41.52.11.81.02.32.52.21.32.72.22.01.20.82.33.82.23.83.32.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value52101.756-0.2873234362.837-8.7141.23914-28.7381.120.9741.772448.014.8362.295-3.3050.4123.9561.47330161711298.097338.2452118171.8849.2339.9217.6940.9552.2350.674
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.20.60.1-0.01.91.71.90.2-0.50.10.9-2.10.10.04.00.23.30.50.40.2-0.30.00.40.12.51.31.61.22.60.63.40.92.31.71.70.21.21.11.00.20.30.1

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.712217.91824112111301626152914211121
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.31.20.51.40.71.50.71.50.91.70.81.50.91.50.71.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7565113116573610012811943311208026160638140535624-2.692-76.77.618-3.7-6.2632145321641463418362630148.5593144213830147.411
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.910.03.34.33.54.03.52.0-0.3-7.50.7-0.3-0.61.73.52.91.73.63.63.62.03.92.53.01.81.13.75.93.45.34.72.91.6

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value314000.0463000.0-197000.0394000.0-178000.0-168000.0-231000.01486000.0513000.0-5000.0-116000.0-124000.0-91000.0-97000.0-99000.0449000.01664000.0-343000.02358000.0253000.0350000.0-189000.0-173000.0-176000.0-120000.0-125000.0-400000.0139000.0-136000.045000.0100000.062000.0106000.03000.00-4000.0-3000.0-2000.02000.0-12000.0-9000.0-10000.0-80000.0-5000.0-40000.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.0-0.00.0-0.0-0.0-0.00.10.0-0.0-0.0-0.0-0.0-0.0-0.00.00.1-0.00.20.00.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.00.00.00.00.00.00.0-0.0-0.0-0.00.0-0.0-0.0-0.0-0.0-0.0-0.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302020-06-302012-06-302012-03-312011-06-302011-03-31
Value755730144421
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.83.63.01.85.93.4

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302020-06-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value755745321641463518362630148.638314421
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.83.63.52.91.73.63.63.62.03.92.53.01.81.13.75.93.5

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value142.5968.996.612101.3422.278-8.002-4.812-3.507-0.196-0.323-0.7883.0898.8884.677-0.146-0.429-6.0080.971-1.5241311-6.7022.3530.0072.6921.4162.0511.9552.9052.778-0.3220.826-0.028-8.8150.360.454-28.954-0.593290.165-1.3550.228-0.588
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.70.10.50.40.70.10.1-0.4-0.2-0.2-0.0-0.0-0.00.20.60.2-0.0-0.0-0.40.1-0.11.41.2-0.60.20.00.20.10.20.20.30.2-0.00.1-0.0-0.80.00.1-3.7-0.13.90.0-0.20.0-0.1

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.465134.2962.839-1.325-22.9616.279-7.108-8.732-5.462-7.9273.1372.9377.716
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.20.80.30.2-0.1-1.60.4-0.4-0.5-0.4-0.40.20.20.6

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:WahaJVs


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.7133.91.9-1.3-23.06.3-7.1-8.7-5.5-7.93.12.97.7
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax106.894.790.866.998.1100.2100.399.999.6100.799.798.898.799.8
Percentage of Revenues-0.20.70.20.1-0.1-1.60.4-0.4-0.4-0.4-0.40.20.20.6
Percentage of Revenues mtz:WahaJVs0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-2.622147.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193-10.117-12.9447.678-5.335-3.3882.844-6.639-0.603-0.198
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.10.80.50.1-0.1-1.60.4-0.4-0.4-0.4-0.50.20.10.5-0.8-1.00.7-0.6-0.30.2-0.7-0.1-0.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.622147.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.10.80.50.1-0.1-1.60.4-0.4-0.4-0.4-0.50.20.10.5
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.622147.4622.223-2.166-23.2576.411-7.442-8.619-5.562-9.6274.3671.2857.193
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.10.80.50.1-0.1-1.60.4-0.4-0.4-0.4-0.50.20.10.5
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7566112116563610013012043311208026160648340555624-2.881-76.9377.442-3.82-6.3882245311641463518362630148.561314421383014
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.93.76.96.93.62.55.96.56.22.81.76.15.01.910.03.34.43.54.23.62.0-0.3-7.50.7-0.4-0.61.83.52.91.73.63.63.62.03.92.53.01.81.13.75.93.45.34.72.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.3140.463-0.1970.394-0.178-0.168-0.2311.4860.513-0.005-0.116-0.124-0.091-0.097
Percentage of ProfitLoss0.40.7-0.20.3-0.3-0.5-0.21.10.4-0.0-0.4-0.1-0.1-0.4
Percentage of Revenues0.00.0-0.00.0-0.0-0.0-0.00.10.0-0.0-0.0-0.0-0.0-0.0
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7565113116573610012811943311208026
Percentage of ProfitLoss99.699.3100.299.7100.3100.5100.298.999.6100.0100.4100.1100.1100.4
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.9
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7565113116573610012811943311208026
Percentage of ProfitLoss99.699.3100.299.7100.3100.5100.298.999.6100.0100.4100.1100.1100.4
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.9
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1962177516361698156914161709201619391518191719771617139616021955189011581341158612329741027111110661003123113091104964115912699779189321067992778774865750618730631495450
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-3.1-2.6-3.0-7.1-3.8-1.0-0.1-0.2-1.0-0.1-0.2-0.7-0.8-0.3-2.6-5.0-1.6-4.3-6.0-7.0-4.6-1.2-2.1-3.9-1.0-0.3-2.3-1.0-0.90.00.0-0.1-1.2-0.9
Percentage of Revenues-0.2-0.1-0.2-0.4-0.2-0.1-0.0-0.0-0.1-0.0-0.0-0.0-0.0-0.0-0.2-0.3-0.1-0.4-0.4-0.4-0.4-0.1-0.2-0.4-0.1-0.0-0.2-0.1-0.10.00.0-0.0-0.1-0.1
Percentage of Revenues-0.2-0.1-0.2-0.4-0.2-0.1-0.0-0.0-0.1-0.0-0.0-0.0-0.0-0.0-0.2-0.3-0.1-0.4-0.4-0.4-0.4-0.1-0.2-0.4-0.1-0.0-0.2-0.1-0.10.00.0-0.0-0.1-0.1
Percentage of Revenues us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0

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

us-gaap:OperatingSegments, mtz:CleanEnergyAndInfrastructure


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value481350345468426286333261
Percentage of Revenues24.519.721.127.627.220.219.513.0
Percentage of Revenues24.519.721.127.627.220.219.513.0
Percentage of Revenues us-gaap:OperatingSegments mtz:CleanEnergyAndInfrastructure100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtz:Communications


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value630568568645654644673679652612649661618627662610592559595624592511521513468469560505528447498543496424
Percentage of Revenues32.132.034.738.041.745.539.433.733.740.433.933.538.244.941.331.231.348.344.439.448.152.550.746.244.046.845.538.647.846.443.042.850.846.3
Percentage of Revenues32.132.034.738.041.745.539.433.733.740.433.933.538.244.941.331.231.348.344.439.448.152.550.746.244.046.845.538.647.846.443.042.850.846.3
Percentage of Revenues us-gaap:OperatingSegments mtz:Communications100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtz:ElectricalTransmission


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value23213312512812412811510310094999984114100819698100101958671757811614213811673
Percentage of Revenues11.87.57.77.67.99.06.85.15.26.35.25.05.28.26.34.25.18.57.56.47.88.96.96.87.311.611.610.610.67.7
Percentage of Revenues11.87.57.77.67.99.06.85.15.26.35.25.05.28.26.34.25.18.57.56.47.88.96.96.87.311.611.610.610.67.7
Percentage of Revenues us-gaap:OperatingSegments mtz:ElectricalTransmission100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtz:OilAndGas1


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value621725599462368359586972936621947103576953674011611140
Percentage of Revenues31.740.936.627.223.525.334.348.248.340.949.452.447.638.446.259.460.3
Percentage of Revenues31.740.936.627.223.525.334.348.248.340.949.452.447.638.446.259.460.3
Percentage of Revenues us-gaap:OperatingSegments mtz:OilAndGas1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.40.10.10.00.10.10.00.0-0.21.60.21.96.6101.91.71.07.63.93.46.93.86.96.68.21.12.72.83.13.53.42.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0-0.00.10.00.10.40.50.10.10.10.50.30.30.70.30.60.70.70.10.20.30.30.30.30.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.0-0.00.10.00.10.40.50.10.10.10.50.30.30.70.30.60.70.70.10.20.30.30.30.30.3
Percentage of Revenues us-gaap:OperatingSegments us-gaap:AllOtherSegments0.00.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:StatementGeographical

country:US


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value190017001600170016001400160020001900140018001900160014001600190018001100130015001200890900100091382010001100992831
Percentage of Revenues96.895.897.8100.1102.098.893.699.298.092.293.996.198.9100.299.897.195.295.096.994.697.491.487.690.085.781.881.284.089.986.3
Percentage of Revenues96.895.897.8100.1102.098.893.699.298.092.293.996.198.9100.299.897.195.295.096.994.697.491.487.690.085.781.881.284.089.986.3
Percentage of Revenues country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33465518144542644778624126335061405956736583123115152183239219
Percentage of Revenues1.72.63.41.10.93.22.53.22.55.23.32.11.72.43.23.12.15.14.24.75.38.612.010.414.318.319.516.8
Percentage of Revenues1.72.63.41.10.93.22.53.22.55.23.32.11.72.43.23.12.15.14.24.75.38.612.010.414.318.319.516.8
Percentage of Revenues us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value590155385227520149894893499748584797486044394974458241544066394238233115318332143123298629403245335633513563347033953013291929542820254024072195222720702081208419961655
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value26749367644801227995
Percentage of Assets5.11.00.81.91.42.73.42.74.0
Percentage of Assets5.11.00.81.91.42.73.42.74.0
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, mtz:CleanEnergyAndInfrastructure


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value653570358
Percentage of Assets12.511.48.1
Percentage of Assets12.511.48.1
Percentage of Assets us-gaap:OperatingSegments mtz:CleanEnergyAndInfrastructure100.0100.0100.0

us-gaap:OperatingSegments, mtz:Communications


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1941195814611314115610321197973843
Percentage of Assets37.139.232.932.336.335.133.633.335.0
Percentage of Assets37.139.232.932.336.335.133.633.335.0
Percentage of Assets us-gaap:OperatingSegments mtz:Communications100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtz:ElectricalTransmission


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value541463423471419409489449311
Percentage of Assets10.49.39.511.613.213.913.715.412.9
Percentage of Assets10.49.39.511.613.213.913.715.412.9
Percentage of Assets us-gaap:OperatingSegments mtz:ElectricalTransmission100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtz:OilAndGas1


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16311762196517621267
Percentage of Assets31.235.344.343.339.8
Percentage of Assets31.235.344.343.339.8
Percentage of Assets us-gaap:OperatingSegments mtz:OilAndGas1100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value191192193153273424226.9
Percentage of Assets3.73.84.43.80.91.20.70.80.3
Percentage of Assets3.73.84.43.80.91.20.70.80.3
Percentage of Assets us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assetsus-gaap:
Period End2020-12-312019-12-31
Value15551504
Percentage of Assets29.830.1
Percentage of Assets29.830.1
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value374034493222332432393203320531793246342630473484315127802633263925901968207921842153204219962221232923172415234123041976189819751900165515451379141112411269121511561002
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.462.361.663.964.965.564.165.467.770.568.670.168.866.964.866.967.763.265.368.068.968.467.968.469.469.267.867.567.965.665.066.967.465.164.262.863.460.061.058.357.960.6

us-gaap:Liabilities us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilitiesus-gaap:
Period End2020-12-312019-12-31
Value10801013
Percentage of Liabilities33.531.6
Percentage of Assets20.720.3
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees69.567.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value590155385227520149894893499748584797486044394974458241544066394238233115318332143123298629403245335633513563347033953013291929542820254024072195222720702081208419961655
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2158208420011873174616851787167415481431138914871428137114301295122611421096102496594093910201022102911431124108610311016974915880857815815829811868839653
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.637.638.336.035.034.435.834.532.329.531.329.931.233.035.232.932.136.734.431.930.931.532.031.430.530.732.132.432.034.234.833.032.534.735.637.236.640.039.041.742.139.4

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2408255023592334213720792173219821272262216826682281190718521747179012671402142213211198113212381354135815311573148913571305133212721145104710251059823822857788721
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.846.145.144.942.842.543.545.344.346.548.953.649.845.945.644.346.840.744.144.342.340.138.538.240.340.543.045.443.945.144.745.145.145.143.546.747.639.839.541.139.543.6

us-gaap:AssetsCurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2020-12-312019-12-31
Value160144
Percentage of AssetsCurrent6.86.6
Percentage of Assets3.12.9
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees10.39.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value2375124232384871714359432768204040431815389.4278.7583.8854.9847.1544.75528247.067159.261222.8481310926101620201678197177119698847
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.09.38.14.61.01.51.40.91.20.90.61.40.51.01.01.10.50.51.20.30.30.10.20.20.10.90.70.20.50.30.80.10.54.31.10.50.81.01.00.83.90.010.70.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CorporateJointVenture


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6.97.68.28.4109.1132029261117171817
Percentage of CashAndCashEquivalentsAtCarryingValue2.91.51.93.522.412.718.347.150.061.843.025.386.546.742.9
Percentage of Assets0.10.10.20.20.20.20.30.40.60.50.30.30.40.50.4
Percentage of Assets us-gaap:CorporateJointVenture0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value2375124232384871714359432740
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.09.38.14.61.01.51.40.91.20.90.61.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value865876784917927796850195318411986192323682077170515981534156910861156121510919709111023112611321303138912881195113412251115902877873899667664711583444
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.715.815.017.618.616.317.040.238.440.943.347.645.341.039.338.941.034.936.337.834.932.531.031.533.633.836.640.137.939.738.941.539.635.536.439.840.432.231.934.129.226.8

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8792898510410610010612612111312510080768495991111081159990901031001121051158970636770839110710088968957
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.71.71.62.12.22.02.22.62.52.62.52.21.91.92.12.53.23.53.43.73.33.12.83.13.03.23.03.43.02.42.12.42.83.54.14.84.94.34.64.53.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value445031294561755555584747402735302729555661736844174.9677.1996.435111115131413
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.60.60.91.31.51.11.11.21.11.00.90.70.90.80.71.01.71.82.02.52.31.20.60.20.30.30.50.50.80.60.70.8

Assets Noncurrent

us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:AssetsNoncurrent

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2020-12-312019-12-31
Value13951359
Percentage of AssetsNoncurrent100.0100.0
Percentage of Assets26.727.2
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees89.790.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value2275216921272059198119231836178916961613157015361489145514261347123511821163114311031086113811391099108810601035899863857797686631547527495482350
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.141.540.941.340.538.537.837.334.936.331.633.535.835.836.235.239.637.136.236.637.037.035.133.932.830.530.630.529.829.629.028.327.026.224.923.723.923.221.1

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value434040403635353433302928262625262424222221212121201919191718181715151313121211
Percentage of PropertyPlantAndEquipmentGross1.91.91.92.01.91.91.91.91.91.91.91.81.81.81.81.91.92.01.91.92.02.01.81.91.91.81.81.82.02.12.12.22.32.42.52.52.52.63.2
Percentage of Assets0.80.80.80.80.80.70.70.70.70.70.60.60.60.70.70.70.80.80.70.70.70.70.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.7
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value23262924632631302620252615128.912189.51423131010141512171816116.6
Percentage of PropertyPlantAndEquipmentGross1.01.21.41.23.21.41.71.71.51.21.61.71.00.90.60.91.50.81.22.11.21.00.91.31.41.11.61.81.91.31.0
Percentage of Assets0.40.50.60.51.30.50.60.60.50.50.50.60.40.30.20.30.60.30.50.80.50.40.30.40.50.30.50.50.60.40.3
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value22822121621120519718117417216616015715614914914814714614214014013613513012612611811410810210599100929083807759
Percentage of PropertyPlantAndEquipmentGross10.010.210.210.310.410.39.99.810.110.310.210.210.510.310.511.011.912.412.312.212.712.611.911.411.511.611.111.012.011.912.312.514.614.716.515.816.316.017.1
Percentage of Assets4.14.24.24.24.23.93.73.63.53.83.23.43.83.73.83.94.74.64.44.54.74.74.23.93.83.53.43.43.63.53.63.54.03.94.13.73.93.73.6
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value8.46.06.06.04.94.94.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.64.84.84.84.84.84.64.64.64.74.7
Percentage of PropertyPlantAndEquipmentGross0.40.30.30.30.20.30.30.30.30.30.30.30.30.30.30.30.40.40.40.40.40.40.40.40.40.40.40.40.50.60.60.60.70.80.80.90.91.01.3
Percentage of Assets0.20.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.3
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MachineryAndEquipment


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value19721875183417761670165915841545146013911350131912851261123711551041997979953923912966968931926901879752727728675565518439425397388274
Percentage of PropertyPlantAndEquipmentGross86.786.486.286.384.386.386.386.486.186.386.085.986.486.786.885.884.384.484.283.483.684.084.985.084.885.185.084.983.684.285.084.782.482.180.280.880.380.578.4
Percentage of Assets35.635.935.335.634.133.232.632.230.131.327.128.831.031.031.430.233.431.330.530.530.931.029.828.927.826.026.025.925.024.924.723.922.221.520.019.119.218.716.6
Percentage of Assets us-gaap:MachineryAndEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value125111871133108610441017973936896865833796779749734699664633609584555528551524491465446417389375352327303280259244230215169
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.622.721.821.821.320.420.019.518.519.516.817.418.818.418.618.321.319.919.018.718.618.017.015.614.713.112.912.312.912.911.911.611.911.711.811.011.110.410.2

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value201110119.87.48.84.74.74.85.25.25.44.95.96.04.94.15.65.25.35.36.96.97.37.38.16.65.84.66.05.85.34.22.92.8
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ContractualRights


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value2.72.73.13.13.01.0
Percentage of AmortizationOfIntangibleAssets13.524.129.527.730.613.5
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:ContractualRights0.00.00.00.00.00.0

us-gaap:CustomerRelatedIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value157.96.97.66.35.97.34.34.24.44.84.95.04.55.45.54.63.84.74.34.74.26.46.56.86.87.56.35.24.2
Percentage of AmortizationOfIntangibleAssets77.570.565.767.964.379.783.091.589.491.792.394.292.691.891.591.793.992.783.982.788.779.292.894.293.293.292.695.589.791.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelatedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1.80.60.50.50.50.51.50.40.50.40.40.20.40.40.50.50.30.30.90.90.51.10.50.40.50.50.60.30.60.4
Percentage of AmortizationOfIntangibleAssets9.05.44.84.55.16.817.08.510.68.37.73.87.48.28.58.36.17.316.117.39.420.87.25.86.86.87.44.510.38.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1024982994972937905862852799747736739709706691648570549554559548558586614608623614618509488504470383350287282264266253240180
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.518.819.119.519.218.117.817.816.416.814.816.117.117.417.517.018.317.217.317.918.319.018.118.318.117.517.718.216.916.717.116.715.114.613.112.712.812.812.212.110.9

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:US


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1000959971949911874831819764707697698658649629583502475476469453464482498491494436337
Percentage of PropertyPlantAndEquipmentNet97.697.797.797.697.296.696.396.195.694.694.794.592.791.991.090.088.086.685.984.182.883.282.281.080.979.389.596.3
Percentage of Assets18.118.418.719.018.617.517.117.115.715.914.015.215.816.016.015.316.114.914.815.015.215.814.914.814.713.915.014.0
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonUs


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value2222222325313133354038405157626468737889949410412951
Percentage of PropertyPlantAndEquipmentNet2.22.32.32.42.83.43.73.94.45.45.35.57.38.19.010.012.013.414.116.017.216.817.820.710.5
Percentage of Assets0.40.40.40.50.50.60.70.70.70.90.80.91.21.41.61.72.22.32.42.93.23.23.23.61.8
Percentage of Assets us-gaap:NonUs0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312016-03-312015-12-312014-06-302013-12-31
Value24824222020519719519620161915
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.24.44.23.93.94.03.90.70.60.60.5

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:Confluence


Investments
Period End2021-03-31
Value0.4
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.2
Percentage of Assets0.0
Percentage of Assets mtz:Confluence0.0

mtz:FMTech


Investments
Period End2021-06-302021-03-312020-12-312020-09-30
Value17171616
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures6.97.07.37.8
Percentage of Assets0.30.30.30.3
Percentage of Assets mtz:FMTech0.00.00.00.0

mtz:TelecommunicationsEquityMethodInvestees


Investments
Period End2021-06-302021-03-312020-12-31
Value202119
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures8.18.78.6
Percentage of Assets0.30.40.4
Percentage of Assets mtz:TelecommunicationsEquityMethodInvestees0.00.00.0

mtz:WahaJVs


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value201196175165157156174
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures81.081.079.580.579.780.088.8
Percentage of Assets3.43.53.33.23.13.23.5
Percentage of Assets mtz:WahaJVs0.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1331126212431231122712211221114011441140110011491146114511371135104099699599799899198810641073107010821000983912899891860824820724724810807801794613
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.622.823.823.724.625.024.423.523.923.524.823.125.027.628.028.827.232.031.331.031.933.233.632.832.031.930.428.829.030.330.830.230.532.434.133.032.539.238.838.439.837.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

mtz:A2019Acquisitions


Goodwillus-gaap:
Period End2020-12-312019-12-31
Value120120
Percentage of Goodwill9.79.9
Percentage of Assets2.32.4
Percentage of Assets mtz:A2019Acquisitions0.00.0

mtz:A2021Acquisitions


Goodwillus-gaap:
Period End2021-06-30
Value88
Percentage of Goodwill6.6
Percentage of Assets1.5
Percentage of Assets mtz:A2021Acquisitions0.0

us-gaap:Goodwill us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments

mtz:A2021Acquisitions, mtz:ElectricalTransmission


Goodwillus-gaap:
Period End2021-06-30
Value46
Percentage of Goodwill3.5
Percentage of Assets0.8
Percentage of Assets mtz:A2021Acquisitions mtz:ElectricalTransmission0.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

mtz:CleanEnergyAndInfrastructure


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-31
Value164166152152152143
Percentage of Goodwill12.313.212.312.412.513.0
Percentage of Assets2.83.02.92.93.13.2
Percentage of Assets mtz:CleanEnergyAndInfrastructure0.00.00.00.00.00.0

mtz:Communications


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value584561562551547541541472472469467467467466466462463420420420420414414418418417417326306
Percentage of Goodwill43.944.545.244.844.644.444.341.441.341.242.540.740.840.741.040.744.542.242.242.242.241.842.039.339.039.038.636.337.3
Percentage of Assets9.910.110.810.611.011.110.89.79.99.710.59.410.211.211.511.712.113.513.213.113.513.914.112.912.512.511.711.212.7
Percentage of Assets mtz:Communications0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtz:ElectricalTransmission


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value196150150150150149149149149149149149149149149149149149149149149149149149149149149149129
Percentage of Goodwill14.711.912.112.212.212.312.313.113.113.113.613.013.113.113.213.214.415.015.115.015.015.115.214.114.014.013.816.715.8
Percentage of Assets3.32.72.92.93.03.13.03.13.13.13.43.03.33.63.73.83.94.84.74.74.85.05.14.64.54.54.25.15.4
Percentage of Assets mtz:ElectricalTransmission0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtz:OilAndGas1


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value386384378377377376377375378377339389386385307
Percentage of Goodwill29.030.430.430.630.730.830.932.933.133.130.933.933.733.930.9
Percentage of Assets6.56.97.27.37.67.77.67.77.97.87.67.88.49.59.7
Percentage of Assets mtz:OilAndGas10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mtz:OilAndGas1, mtz:ReportingUnitA


Goodwillus-gaap:
Period End2020-09-30
Value15
Percentage of Goodwill1.2
Percentage of Assets0.3
Percentage of Assets mtz:OilAndGas1 mtz:ReportingUnitA0.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:TradeNames


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value34343434343434343434343434343434343434343434343434343434343434343434342828353535
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.70.70.70.70.70.70.70.70.80.70.80.80.80.90.91.11.11.11.11.21.21.11.01.01.01.01.01.21.21.21.21.41.41.31.31.71.72.1
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value52122518419120220021118419019316917718118719119518517617918619219719921823023625022223017116517216813213710210511511712212678
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.84.13.53.74.14.14.23.84.04.03.83.64.04.54.75.04.95.65.65.86.26.66.86.76.97.07.06.46.85.75.75.96.05.25.74.74.75.65.75.96.34.7

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value14910460797091122717466703638414436
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.92.11.41.92.23.13.42.42.62.62.91.61.72.02.12.2

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ContractualRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5861636467680.0
Percentage of FiniteLivedIntangibleAssetsNet0.00.042.30.00.00.00.0
Percentage of Assets1.01.11.21.21.31.40.0
Percentage of Assets us-gaap:ContractualRights0.00.00.00.00.00.00.0

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value367119798592899568727654596468707467596368727780879410110977846860666138
Percentage of FiniteLivedIntangibleAssetsNet0.00.053.10.00.00.091.50.00.00.089.30.00.00.089.40.00.00.089.50.00.00.088.60.00.00.089.50.00.00.085.00.086.685.5
Percentage of Assets6.22.21.51.61.91.81.91.41.51.61.21.21.41.71.71.91.81.92.02.12.32.62.72.72.83.03.12.22.52.32.12.32.51.8
Percentage of Assets us-gaap:CustomerRelatedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value59106.97.47.98.38.86.87.27.76.56.97.27.68.48.87.37.17.48.09.09.4101111121212121010119.56.4
Percentage of FiniteLivedIntangibleAssetsNet0.00.04.60.00.00.08.50.00.00.010.70.00.00.010.60.00.00.010.50.00.00.011.40.00.00.010.50.00.00.015.00.013.414.3
Percentage of Assets1.00.20.10.10.20.20.20.10.20.20.10.10.20.20.20.20.20.20.20.20.30.30.40.30.30.40.40.30.40.30.40.40.40.3
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical

us-gaap:IntangibleAssetsNetIncludingGoodwill

country:US


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1800140014001400140014001400130013001300120012001200120012001200110011001100110011001100110011001100110011001000900
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.525.326.826.928.128.628.026.827.126.727.024.126.228.929.530.428.835.334.634.235.236.837.433.932.832.830.934.337.4
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonUs


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value484950505151566263626110810710911211411010810711111311310719322792
Percentage of IntangibleAssetsNetIncludingGoodwill2.73.53.63.63.73.74.04.84.94.85.19.08.99.19.49.510.19.89.810.110.310.39.817.620.79.3
Percentage of Assets0.80.91.01.01.01.11.11.31.31.31.42.22.32.62.82.92.93.53.43.53.63.83.66.06.43.2
Percentage of Assets us-gaap:NonUs0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2151621761871982102292332412230.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets3.72.93.43.64.04.34.64.85.04.60.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3233122822622522432542372412422532422322041781721581055553525060136847876597361605341474547555566342930
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.55.65.45.05.15.05.14.95.05.05.74.95.14.94.44.44.13.41.81.71.71.72.14.22.52.32.11.72.22.02.11.81.51.91.92.12.52.73.21.71.51.9

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:EquitySecuritiesFvNi

mtz:AVCT, us-gaap:CommonStock


Equity
Period End2021-06-302021-03-312020-12-312020-09-30
Value19171711
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0
Percentage of Assets0.30.30.30.2
Percentage of Assets mtz:AVCT us-gaap:CommonStock0.00.00.00.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value629632571582630533535625633558669744544457377457429294363435440363348376434393485481494440424475383360394431435327306335294196
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.711.410.911.212.610.910.712.913.211.515.115.011.911.09.311.611.29.411.413.614.112.211.911.612.911.713.613.914.514.614.616.113.614.216.419.719.615.814.816.114.811.9

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value20723618716916312511513915813013314618713714812813412611211885596981899289826960716445
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.54.33.63.33.32.62.32.93.32.73.02.94.13.33.73.33.54.13.53.72.72.02.42.52.72.82.52.42.02.02.42.21.9

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value238259228368338204206183221243231197251222206
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.04.74.47.16.84.24.13.84.65.05.24.05.55.45.1

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value163816321415151415231260121913341391126212831372125210479631002928813839942866811752787852881980910868820825882798691705749719578580577553486
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.829.527.129.130.525.724.427.529.026.028.927.627.325.223.725.424.326.126.429.327.727.225.624.325.426.327.526.225.627.228.329.928.327.229.334.132.327.927.927.727.729.4

us-gaap:LiabilitiesCurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2020-12-312019-12-31
Value5634
Percentage of LiabilitiesCurrent4.02.9
Percentage of Assets1.10.7
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees3.62.3

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value856972747880817977730.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.41.21.41.41.61.61.61.61.61.50.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value103101747168717410088738085847265987388704034474334354366221724243935422928233032202221
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.41.41.41.51.52.11.91.51.81.71.91.71.62.51.92.82.21.31.11.61.51.11.01.31.90.70.50.80.91.31.21.71.21.31.11.51.61.01.11.3

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:LiabilitiesNoncurrent

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2020-12-312019-12-31
Value1024978
Percentage of LiabilitiesNoncurrent100.0100.0
Percentage of Assets19.619.6
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees65.965.0

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value14201170115711641115129713141221125015391324168815321343128011921313893961950998938945109811361078106110881088841765779806685546410467426460426400394
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.121.122.122.422.426.526.325.126.131.729.833.933.532.331.530.234.428.730.229.632.031.432.233.833.932.229.831.432.127.926.226.428.627.022.718.721.020.622.120.520.023.8

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value323304302301267276296277256274263258206197204166169
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.55.55.85.85.45.65.95.75.35.75.95.24.54.75.05.25.8

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3007000.04066000.03603000.03800000.04125000.04303000.04471000.04703000.03217000.02121000.02126000.02242000.02366000.02457000.02554000.07592000.07143000.05479000.07103000.04745000.04492000.03632000.03821000.03994000.04169000.04289000.04414000.04838000.04698000.05016000.04969000.04875000.04872000.04766000.04763000.043000.047000.050000.052000.051000.063000.081000.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.00.00.00.10.10.10.20.20.20.20.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.00.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2142352302191982262211861781951761641591911841709486999890776865636666454340404238393840413631252424
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.64.24.44.24.04.64.43.83.74.04.03.33.54.64.54.32.52.83.13.12.92.62.32.01.92.01.91.31.31.41.41.41.41.51.61.81.91.81.51.21.21.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1421061161251331431541591681530.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.41.92.22.42.72.93.13.33.53.20.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value42274946
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.70.50.90.9

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value30172523
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.50.30.50.5

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value18101615
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.30.20.30.3

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value10
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
Value20
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.4

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-31
Value228176189200236238246227
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.93.23.63.84.74.95.14.7

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value243189204217
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets4.13.43.94.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value14131517
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.20.20.30.3

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2158208420011873174616851787167415481431138914871428137114301295122611421096102496594093910201022102911431124108610311016974915880857815815829811868839653
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.637.638.336.035.034.435.834.532.329.531.329.931.233.035.232.932.136.734.431.930.931.532.031.430.530.732.132.432.034.234.833.032.534.735.637.236.640.039.041.742.139.4

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value2161208820051877175016891791167915511433139214891430137414331303123311471103102997094394310241027103311481128109110361021979920885861815815829811869839653528443
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.637.738.436.135.134.535.934.632.329.531.429.931.233.135.233.132.336.834.732.031.131.632.131.630.630.832.232.532.134.435.033.132.634.935.837.236.640.039.041.742.139.40.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-79.856-77.234-91.444-98.906-101.129-98.963-75.706-82.117-74.675-66.056-60.494-50.867-55.234-56.519-63.712-65.814-72.351-34.004-13.286-5.501-7.946-6.156-6.124-13.412
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-3.7-3.7-4.6-5.3-5.8-5.9-4.2-4.9-4.8-4.6-4.3-3.4-3.9-4.1-4.4-6.0-7.7-3.0-1.3-0.6-1.0-0.9-1.2-3.0
Percentage of Assets-1.4-1.4-1.7-1.9-2.0-2.0-1.5-1.7-1.6-1.4-1.4-1.0-1.2-1.4-1.6-2.1-2.5-1.0-0.5-0.2-0.4-0.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value841840837829821814809804799793789788783779775788769756822803792663629622
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest38.940.241.844.246.948.245.247.951.555.456.752.954.856.754.171.581.665.980.693.297.6101.6119.2140.5
Percentage of Assets14.315.216.015.916.516.616.216.616.716.317.815.817.118.819.124.826.221.228.233.438.140.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value9.3269.3259.3119.2769.2679.2629.1919.1659.1639.1599.1339.119.1089.1069.0949.0638.828.7628.6728.5928.5167.8227.5967.545
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.40.40.50.50.50.50.50.50.60.60.70.60.60.70.60.80.90.80.81.01.01.21.41.7
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.20.30.40.40.50.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3.0074.0663.6033.84.1254.3034.4714.7033.2172.1212.1262.2422.3662.4572.5547.1033.8214.4144.9694.7630.0520.0810.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.20.20.20.20.30.20.30.20.10.20.20.20.20.20.60.40.40.50.60.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.00.00.00.10.10.10.20.10.10.20.20.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value215820842001187317461685178716741548143113891487142813711430109693911431016857811653528443
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest99.999.899.899.899.899.799.899.799.899.999.899.899.899.899.899.499.699.699.599.4100.0100.0100.0100.0
Percentage of Assets36.637.638.336.035.034.435.834.532.329.531.329.931.233.035.234.432.032.134.835.639.039.40.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value19741899183317201603154615101409128111611118108696588585750937845734120093-12.512-103.04-173.788
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest91.490.991.491.791.691.584.384.082.681.080.372.967.564.459.846.240.139.933.523.311.5-1.9-19.5-39.2
Percentage of Assets33.534.335.133.132.131.630.229.026.723.925.221.821.121.321.116.012.912.811.78.34.5-0.80.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStockCommon


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value-586.955-586.955-586.955-586.955-586.955-586.153-466.727-466.727-466.727-466.727-466.125-345.572-275.435-245.573-147.124-145.573-145.573-45.573-150.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-27.2-28.1-29.3-31.3-33.5-34.7-26.0-27.8-30.1-32.6-33.5-23.2-19.3-17.9-10.3-13.2-15.4-4.0-14.7
Percentage of Assets-9.9-10.6-11.2-11.3-11.8-12.0-9.3-9.6-9.7-9.6-10.5-6.9-6.0-5.9-3.6-4.6-5.0-1.3-5.1
Percentage of Assets us-gaap:TreasuryStockCommon0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9326000.09325000.09311000.09276000.09267000.09262000.09191000.09165000.09163000.09159000.09133000.09110000.09108000.09106000.09094000.09084000.09083000.09079000.09063000.09045000.09040000.08836000.08820000.08795000.08793000.08783000.08762000.08711000.08704000.08700000.08672000.08669000.08619000.08626000.08592000.08544000.08533000.08526000.08516000.08483000.08471000.07822000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.20.30.30.30.30.30.30.30.40.40.40.40.40.40.40.5

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value841840837829821814809804799793789788783779775800796791788785781775769767764761756781776827822819809809803798792
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.315.216.015.916.516.616.216.616.716.317.815.817.118.819.120.320.825.424.824.525.026.026.223.722.822.721.222.522.927.528.227.728.731.833.436.338.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value197418991833172016031546151014091281116111181086965885857696632550509456400375378455447451457435389357341300254219200164137107938453-12.512
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.534.335.133.132.131.630.229.026.723.925.221.821.121.321.117.716.517.716.014.212.812.612.914.013.313.512.812.511.511.911.710.29.08.68.37.56.25.24.54.12.7-0.8

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-79856000.0-77234000.0-91444000.0-98906000.0-101130000.0-98963000.0-75706000.0-82117000.0-74675000.0-66056000.0-60494000.0-50867000.0-55234000.0-56519000.0-63712000.0-64686000.0-66135000.0-64000000.0-65814000.0-80866000.0-79067000.0-74700000.0-72351000.0-66054000.0-52723000.0-56032000.0-34004000.0-23887000.0-10943000.0-18621000.0-13286000.0-9898000.0-12742000.0-6104000.0-5501000.0-5303000.0-7866000.0-6577000.0-7946000.0-9399000.0-6098000.0-6156000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.4-1.4-1.7-1.9-2.0-2.0-1.5-1.7-1.6-1.4-1.4-1.0-1.2-1.4-1.6-1.6-1.7-2.1-2.1-2.5-2.5-2.5-2.5-2.0-1.6-1.7-1.0-0.7-0.3-0.6-0.5-0.3-0.5-0.2-0.2-0.2-0.4-0.3-0.4-0.5-0.3-0.4

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-27172000.0-10021000.05002000.0-861000.0-1336000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax29.713.2-8.31.42.0
Percentage of Assets-0.5-0.20.1-0.0-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-31
Value-64272000.0-65685000.0-65496000.0-62851000.0-64478000.0-67063000.0-28716000.0-18599000.0-5655000.0-13333000.0-7998000.0-3945000.0-6880000.0-929000.0-106000.0275000.0-2029000.0-399000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax70.386.8108.398.698.092.784.477.951.771.660.239.954.015.21.9-5.225.56.5
Percentage of Assets-1.2-1.3-1.5-1.5-2.0-2.3-0.8-0.5-0.2-0.4-0.3-0.1-0.2-0.0-0.00.0-0.1-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3007000.04066000.03603000.03800000.04125000.04303000.04471000.04703000.03217000.02121000.02126000.02242000.02366000.02457000.02554000.07592000.07143000.05479000.07103000.04745000.04492000.03632000.03821000.03994000.04169000.04289000.04414000.04838000.04698000.05016000.04969000.04875000.04872000.04766000.04763000.043000.047000.050000.052000.051000.063000.081000.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.00.00.00.10.10.10.20.20.20.20.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.182
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.182
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.182
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2020-12-312020-09-30
Value0719000.0
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders0.0100.0
Percentage of Assets0.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2020-12-312020-09-30
Value0719000.0
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders0.0100.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9225722421529320310889398-46.8075033.553-60.28483-22.362266-242.1661547898121510694471182412575-20.39475110-17.2493157133-62.5954346-45.791-44.9275011772
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.714.513.712.718.714.36.44.520.5-3.126.20.2-3.76.0-1.413.6-12.813.35.86.21.01.610.48.54.411.819.72.06.9-2.16.58.7-1.83.56.212.5-6.35.66.0-5.3-6.08.116.111.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-541.502-134.612-39.428-40.504-77.933-58.74-118.299-20.722-11.599-111.203-39.662-31.042-80.239-30.856-23.319-100.137-79.673-69.619-46.96-34.189-47.252-12.6241-56.222-63.821-50.407-196.557-21.563-164.032-57.11-10.161-72.185-148.769-32.096-163.42-21.47573-16.581-12.972-30.784-71.686-31.12-56.545-16.565
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-27.6-7.6-2.4-2.4-5.0-4.1-6.9-1.0-0.6-7.3-2.1-1.6-5.0-2.2-1.5-5.1-4.2-6.0-3.5-2.2-3.8-1.34.1-5.1-6.0-5.0-16.0-1.6-14.9-5.9-0.9-5.7-15.2-3.5-17.5-2.07.4-2.1-1.7-3.6-9.5-5.0-7.7-2.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value174-33.191-0.62314-238.608-145.22437-85.218-370.598173-504.01875121-53.45842-141.001324-107.794-1.857-63.67539-3.648-151.76-36.792-7.538-62.83-28.303-12.1899464-45.265-49.1526983121-118.167-14.098-27.062-29.60914-2.9251.154-2.993-5.124
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.9-1.9-0.00.9-15.2-10.32.2-4.2-19.111.4-26.33.87.5-3.82.7-7.217.2-9.3-0.1-4.03.2-0.4-14.8-3.3-0.7-6.3-2.3-0.98.66.7-3.9-3.97.19.113.0-11.1-1.4-3.5-3.81.7-0.40.2-0.4-0.8

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-275.13689184189-23.0250.23628-16.0811515
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-14.05.011.311.2-1.50.01.7-0.80.81.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value18-19.838-0.76728-7.961-12.6141322-15.0890.8994.804517.071-7.243-73.91115688.403-2.596-2.4945.524-4.369130.95-3.333-6.6939.462-6.8667.8793.281-2.9062.3310-3.626
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1079087826760615559595654514949504542424240394142434242413633373733312622212021191815141414
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.82.92.62.82.72.82.92.31.82.11.51.61.61.51.41.61.61.71.61.71.71.81.81.81.71.71.71.41.41.21.20.91.00.9
Percentage of DepreciationDepletionAndAmortization2.63.23.03.44.04.64.74.23.03.62.72.93.13.02.83.23.54.03.84.04.24.64.34.33.94.04.03.43.83.63.22.43.02.8

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mtz:CleanEnergyAndInfrastructure


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value107.64.55.04.74.04.43.3
Percentage of DepreciationDepletionAndAmortization9.88.45.26.17.06.67.26.0

us-gaap:OperatingSegments, mtz:Communications


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2321252121191915151414141514131313121312121213131212121010.09.910.09.59.18.2
Percentage of DepreciationDepletionAndAmortization22.224.128.725.531.732.631.528.425.524.926.426.429.629.227.827.529.728.030.729.430.531.531.231.328.728.229.424.227.229.626.425.227.125.8

us-gaap:OperatingSegments, mtz:ElectricalTransmission


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value146.16.16.26.65.95.25.15.24.54.64.85.15.35.55.85.75.86.16.15.85.25.15.55.25.25.25.23.92.8
Percentage of DepreciationDepletionAndAmortization13.16.77.07.59.89.88.59.28.77.68.18.79.910.611.111.612.613.514.314.314.313.312.313.012.012.212.212.510.68.4

us-gaap:OperatingSegments, mtz:OilAndGas1


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5652484732282928343431302625252623
Percentage of DepreciationDepletionAndAmortization52.357.656.157.547.646.448.152.257.258.656.055.850.551.151.551.951.1

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.00.00.00.10.00.00.00.0
Percentage of DepreciationDepletionAndAmortization0.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.20.00.00.00.00.00.00.20.00.00.00.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-94.70361-137.174-10.444108-48.337-112.33116-148.47831-428.6922923749783-54.435462-73.723-56.17112312454-109.942-92.949-9.378-150.006-290.723114-20.22533
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-4.516-0.651-2.259-20.27410-5.932-2.758-21.5589.955-9.69-7.659287.8990.651-2.608-5.284-6.891-21.4043.332-7.554179.090.05-13.052.922-12.278-14.932-9.58723137.003-3.36-4.957-12.167-5.512-16.6896.969-0.216-7.8238.943198.708-5.61414
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9225722421529320310889398-46.8075033.553-60.28483-22.362266-242.1661547898121510694471182412575-20.39475110-17.2493157133-62.5954346-45.791-44.9275011772
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.714.513.712.718.714.36.44.520.5-3.126.20.2-3.76.0-1.413.6-12.813.35.86.21.01.610.48.54.411.819.72.06.9-2.16.58.7-1.83.56.212.5-6.35.66.0-5.3-6.08.116.111.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7565113116573610012811943311208026160638140535624-2.692-76.77.618-3.7-6.2632145321641463418362630148.5593144213830147.411
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.910.03.34.33.54.03.52.0-0.3-7.50.7-0.3-0.61.73.52.91.73.63.63.62.03.92.53.01.81.13.75.93.45.34.72.91.6

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7566112116563610013012043311208026160648340555624-2.881-76.9377.442-3.82-6.3882245311641463518362630148.561314421383014
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.93.76.96.93.62.55.96.56.22.81.76.15.01.910.03.34.43.54.23.62.0-0.3-7.50.7-0.4-0.61.83.52.91.73.63.63.62.03.92.53.01.81.13.75.93.45.34.72.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.3140.463-0.1970.394-0.178-0.168-0.2311.4860.513-0.005-0.116-0.124-0.091-0.097
Percentage of ProfitLoss0.40.7-0.20.3-0.3-0.5-0.21.10.4-0.0-0.4-0.1-0.1-0.4
Percentage of Revenues0.00.0-0.00.0-0.0-0.0-0.00.10.0-0.0-0.0-0.0-0.0-0.0
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7565113116573610012811943311208026
Percentage of ProfitLoss99.699.3100.299.7100.3100.5100.298.999.6100.0100.4100.1100.1100.4
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.9
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7565113116573610012811943311208026
Percentage of ProfitLoss99.699.3100.299.7100.3100.5100.298.999.6100.0100.4100.1100.1100.4
Percentage of Revenues3.83.76.96.93.62.65.96.46.22.81.76.15.01.9
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302010-09-30
Value6.0725.5286.3375.6395.854.0494.3154.1924.223.723.4413.5153.3893.1820.9611.013
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-541.502-134.612-39.428-40.504-77.933-58.74-118.299-20.722-11.599-111.203-39.662-31.042-80.239-30.856-23.319-100.137-79.673-69.619-46.96-34.189-47.252-12.6241-56.222-63.821-50.407-196.557-21.563-164.032-57.11-10.161-72.185-148.769-32.096-163.42-21.47573-16.581-12.972-30.784-71.686-31.12-56.545-16.565
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-27.6-7.6-2.4-2.4-5.0-4.1-6.9-1.0-0.6-7.3-2.1-1.6-5.0-2.2-1.5-5.1-4.2-6.0-3.5-2.2-3.8-1.34.1-5.1-6.0-5.0-16.0-1.6-14.9-5.9-0.9-5.7-15.2-3.5-17.5-2.07.4-2.1-1.7-3.6-9.5-5.0-7.7-2.6

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value4848305072604127233446466522402627282825501313222819182332352430452529211414
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value174-33.191-0.62314-238.608-145.22437-85.218-370.598173-504.01875121-53.45842-141.001324-107.794-1.857-63.67539-3.648-151.76-36.792-7.538-62.83-28.303-12.1899464-45.265-49.1526983121-118.167-14.098-27.062-29.60914-2.9251.154-2.993-5.124
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.9-1.9-0.00.9-15.2-10.32.2-4.2-19.111.4-26.33.87.5-3.82.7-7.217.2-9.3-0.1-4.03.2-0.4-14.8-3.3-0.7-6.3-2.3-0.98.66.7-3.9-3.97.19.113.0-11.1-1.4-3.5-3.81.7-0.40.2-0.4-0.8

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302011-12-31
Value0.00.00.8011190.00.00.05.6521157037901.5520.00.00.00.00.00.00.00.00.016830.00.00.00.00.00.00.03973
Percentage of PaymentsForRepurchaseOfCommonStock0.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

mtz:FourPointFivePercentSeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2020-07-22
Value0.045
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mtz:FourPointFivePercentSeniorNotes us-gaap:SeniorNotes us-gaap:SubsequentEvent0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value26.330.71.425.70.2670.012-0.0110.250.250.220.050.170.310.30.4050.0050.380.3810.38-0.0010.3880.380.390.0010.3940.3970.3980.0070.3690.3920.39
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-03-312020-12-31
Value146680.0309640.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0

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
Value116797967112918573605643
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value18139.48.10.00.00.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.00.00.00.0

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
Value45484040210.30.20.12.02.85.6
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:ChangesInContractEstimatesCostToCostMeasureOfProgressFinancialEffectPercentage us-gaap:Range

mtz:ChangesInContractEstimatesCostToCostMeasureOfProgressFinancialEffectPercentage

srt:Maximum


Changes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value05.004.9500.050000.050000.0500
Percentage of ChangesInContractEstimatesCostToCostMeasureOfProgressFinancialEffectPercentage0.0100.00.0100.00.0100.00.00.00.0100.00.00.00.0100.00.00.0

mtz:EBITDA

mtz:EBITDA


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value224198255253159114202247236136144222188104123175198
Percentage of EBITDA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:EBITDA us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-19.9-40.0-23.9-37.5-31.0-31.9-28.0-38.9-19.2-29.5-81.4-27.6-21.6-25.8-19.5-22.0-29.6
Percentage of EBITDA-8.9-20.2-9.4-14.8-19.4-28.0-13.8-15.7-8.1-21.6-56.3-12.4-11.4-24.7-15.8-12.5-14.9

mtz:EBITDA us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mtz:CleanEnergyAndInfrastructure


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value15101034305.0252.3
Percentage of EBITDA7.05.54.313.618.84.412.70.9

us-gaap:OperatingSegments, mtz:Communications


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7248637976505457524559747382746559
Percentage of EBITDA32.424.624.831.447.844.626.723.022.233.241.333.639.178.560.237.329.9

us-gaap:OperatingSegments, mtz:ElectricalTransmission


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9.33.60.79.1-3.28.39.27.88.73.85.53.1-2.74.66.44.53.5
Percentage of EBITDA4.11.80.33.6-2.07.34.53.13.72.83.81.4-1.44.45.22.61.8

us-gaap:OperatingSegments, mtz:OilAndGas1


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13816719516080741342121791071401551223346108154
Percentage of EBITDA61.684.576.863.250.165.366.485.975.878.796.869.965.031.537.461.777.4

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


E
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8.37.48.27.67.57.47.16.76.46.24.77.06.85.98.2106.8
Percentage of EBITDA3.73.73.23.04.76.53.52.72.74.53.23.13.65.66.75.83.4

mtz:EffectOfRepurchasesOnWeightedAverageSharesOutstanding

mtz:EffectOfRepurchasesOnWeightedAverageSharesOutstanding


Effect
Period End2020-12-312018-12-312018-09-302018-06-30
Value300000.0700000.03500000.02500000.0
Percentage of EffectOfRepurchasesOnWeightedAverageSharesOutstanding100.0100.0100.0100.0

mtz:EmployeeServiceShareBasedCompensationNetTaxBenefitDeficiencyFromVestingOfShareBasedPaymentAwards

mtz:EmployeeServiceShareBasedCompensationNetTaxBenefitDeficiencyFromVestingOfShareBasedPaymentAwards


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value100000.0100000.0600000.0100000.0-100000.0-100000.01600000.0002300000.01300000.0100000.05600000.0
Percentage of EmployeeServiceShareBasedCompensationNetTaxBenefitDeficiencyFromVestingOfShareBasedPaymentAwards100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

mtz:EmployeeStockPurchasePlanWeightedAveragePerShareGrantDateFairValue

mtz:EmployeeStockPurchasePlanWeightedAveragePerShareGrantDateFairValue


Employee
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.470.9-0.247.950.740.430.788.76-0.26
Percentage of EmployeeStockPurchasePlanWeightedAveragePerShareGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:FinitelivedIntangibleAssetsTransferInOut us-gaap:FiniteLivedIntangibleAssetsByMajorClass

mtz:FinitelivedIntangibleAssetsTransferInOut

us-gaap:ContractualRights


Finitelived
Period End2020-09-302020-06-302020-03-31
Value0.00.069
Percentage of FinitelivedIntangibleAssetsTransferInOut0.00.0100.0

mtz:IndefinitelivedIntangibleAssetsTransferInOut us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

mtz:IndefinitelivedIntangibleAssetsTransferInOut

us-gaap:ContractualRights


Indefinitelived
Period End2020-09-302020-06-302020-03-31
Value00-69800000.0
Percentage of IndefinitelivedIntangibleAssetsTransferInOut0.00.0100.0

mtz:IntangibleAssetsAcquiredGrossExcludingGoodwill

mtz:IntangibleAssetsAcquiredGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-31
Value314521.3
Percentage of IntangibleAssetsAcquiredGrossExcludingGoodwill100.0100.0100.0

mtz:IntangibleAssetsExcludingGoodwillPurchaseAccountingAdjustments

mtz:IntangibleAssetsExcludingGoodwillPurchaseAccountingAdjustments


Intangible
Period End2020-12-31
Value0
Percentage of IntangibleAssetsExcludingGoodwillPurchaseAccountingAdjustments0.0

mtz:IntangibleAssetsGrossExcludingGoodwillTranslationAdjustments

mtz:IntangibleAssetsGrossExcludingGoodwillTranslationAdjustments


Intangible
Period End2021-06-302021-03-312020-12-31
Value500000.0500000.01500000.0
Percentage of IntangibleAssetsGrossExcludingGoodwillTranslationAdjustments100.0100.0100.0

mtz:NumberOfCustomers1

mtz:NumberOfCustomers1


Number
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value130.0330.040.055.085.0295.060.035.060.0320.035.040.045.0350.045.080.070.0305.045.040.065.0310.050.050.090.0340.085.070.0
Percentage of NumberOfCustomers1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:RetainagePercentOfContractBillings us-gaap:Range

mtz:RetainagePercentOfContractBillings

srt:Maximum


Retainage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value010.009.900.10000.100
Percentage of RetainagePercentOfContractBillings0.0100.00.0100.00.0100.00.00.00.0100.00.00.0

srt:Minimum


Retainage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value05.004.9500.050000.0500
Percentage of RetainagePercentOfContractBillings0.050.00.050.00.050.00.00.00.050.00.00.0

mtz:WeightedAveragePricePerSharePurchasedUnderEmployeeStockPurchasePlans

mtz:WeightedAveragePricePerSharePurchasedUnderEmployeeStockPurchasePlans


Weighted
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.322.68-2.2127.823.231.713.0434.48-1.38
Percentage of WeightedAveragePricePerSharePurchasedUnderEmployeeStockPurchasePlans100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value0.780.7830.7870.750.7260.7251.5280.9540.2840.4530.7480.3850.7260.7250.7250.760.7450.870.7850.7360.7370.7360.5970.7120.6850.6391.3031.412.282.3623.8272.3622.2892.2392.1712.1712.1252.1282.0921.9971.7381.7250.829
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value816812111759371121271204332121802416264844258593346331638523724
Percentage of BusinessAcquisitionsProFormaNetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:BusinessAcquisitionsProFormaRevenue


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value20001800170017001600140019432015193915181917197716171400160219551924122013851634158913091161964776141711351029
Percentage of BusinessAcquisitionsProFormaRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.51.2-1.7-4.30.4-1.2-7.3-1.5-1.4-6.1-0.5-0.90.52.05.53.21.60.00.2-4.5-9.0-3.82.31.11.07.27.53.51.8
Percentage of BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value271864769634971413539131845766462330.069111120222133891191361418543
Percentage of BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CompensationExpenseExcludingCostOfGoodAndServiceSold us-gaap:AwardType

us-gaap:CompensationExpenseExcludingCostOfGoodAndServiceSold

us-gaap:EmployeeStock


Compensation
Period End2021-06-302021-03-312020-06-302020-03-31
Value200000.0300000.0800000.0400000.0
Percentage of CompensationExpenseExcludingCostOfGoodAndServiceSold100.0100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

mtz:ATT1, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value12.011.015.00.190.240.180.180.230.21
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:CustomerA, us-gaap:AccountsReceivable, us-gaap:CreditConcentrationRisk


Concentration
Period End2021-06-302020-12-31
Value12.015.0
Percentage of ConcentrationRiskPercentage1100.00.0

mtz:CustomerB, us-gaap:AccountsReceivable, us-gaap:CreditConcentrationRisk


Concentration
Period End2020-12-31
Value12.0
Percentage of ConcentrationRiskPercentage10.0

mtz:CustomerWithHighestNetAccountsReceivablePosition1, us-gaap:AccountsReceivable, us-gaap:CreditConcentrationRisk


Concentration
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value14.015.015.00.170.160.170.140.130.230.260.360.390.46
Percentage of ConcentrationRiskPercentage1127.30.0100.089.566.70.077.872.2100.00.0171.40.00.0

mtz:CustomerWithSecondHighestNetAccountsReceivablePosition, us-gaap:AccountsReceivable, us-gaap:CreditConcentrationRisk


Concentration
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10.012.013.00.140.150.130.120.120.150.180.270.180.15
Percentage of ConcentrationRiskPercentage190.90.086.773.762.50.066.766.765.20.0128.60.00.0

mtz:EnbridgeInc, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-06-302020-03-31
Value12.025.01.01.0
Percentage of ConcentrationRiskPercentage1100.0227.3526.3416.7

mtz:EquitransMidstreamCorporationEQTCorporation, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-09-302020-06-302019-09-302019-06-302018-09-30
Value3.00.010.170.120.28
Percentage of ConcentrationRiskPercentage120.05.394.466.7133.3

mtz:Govermment, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.00.020.021.00.010.01
Percentage of ConcentrationRiskPercentage113.310.58.3555.65.64.3

mtz:GovermmentTransactions, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.04.02.02.0
Percentage of ConcentrationRiskPercentage150.036.41052.6833.3

mtz:PermianHighwayPipeline, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302020-06-302019-06-30
Value00.10
Percentage of ConcentrationRiskPercentage10.052.60.0

mtz:TenLargestCustomers1, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value55.068.063.00.660.620.650.650.620.76
Percentage of ConcentrationRiskPercentage1458.3618.2420.0347.4258.3361.1361.1269.6361.9

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments

mtz:Utilities, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk, mtz:Communications


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value20.620.115.70.1490.1520.1490.1540.1560.139
Percentage of ConcentrationRiskPercentage1171.7182.7104.778.463.382.885.667.866.2

us-gaap:ConcentrationRiskPercentage1 us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

mtz:MasterServiceAndOtherServiceAgreements, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value32.028.032.00.360.420.320.330.410.32
Percentage of ConcentrationRiskPercentage1266.7254.5213.3189.5175.0177.8183.3178.3152.4

us-gaap:ConcentrationRiskPercentage1 us-gaap:ProductOrService, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:TimingOfTransferOfGoodOrService

mtz:MasterServiceAndOtherServiceAgreements, us-gaap:SalesRevenueNet, us-gaap:ProductConcentrationRisk, us-gaap:TransferredAtPointInTime


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value4.05.04.00.050.060.040.050.060.06
Percentage of ConcentrationRiskPercentage133.345.526.726.325.022.227.826.128.6

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:NonUs, us-gaap:AccountsReceivable, us-gaap:GeographicConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value3.05.05.04.00.030.040.050.050.060.060.050.030.030.050.08
Percentage of ConcentrationRiskPercentage125.045.50.026.715.816.70.027.833.326.10.014.30.00.00.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-30
Value191462010231051024412515
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value30132.08.85.4176.1132212-17.1725.244
Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfGoodsAndServicesSoldAmortization

us-gaap:CostOfGoodsAndServicesSoldAmortization


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value191110119.7937.3918.8454.6814.6654.805
Percentage of CostOfGoodsAndServicesSoldAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfGoodsAndServicesSoldDepreciation

us-gaap:CostOfGoodsAndServicesSoldDepreciation


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value87797671575352505554
Percentage of CostOfGoodsAndServicesSoldDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRedemptionPricePercentage

mtz:FourPointEightSevenFivePercentSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2020-08-19
Value100.81
Percentage of DebtInstrumentRedemptionPricePercentage100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss

mtz:AVCT


Debt
Period End2020-09-30
Value900000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedGainLoss100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value159000.0-72000.0199000.0-484000.0280000.0934000.0335000.0-74000.0-89000.09000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.21.12.11.41.40.92.61.01.13.22.20.91.00.87.41.31.31.20.01.72.31.60.51.21.31.40.31.81.84.52.04.51.81.50.90.70.40.51.30.91.03.2
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentDividendsOrDistributions

mtz:WahaJVs


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.82.45.22.61.61.52.13.90.03.22.05.7
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

mtz:AVCT


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1.0-1.05.40.93.8
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings us-gaap:ContingentConsiderationByType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

mtz:EarnoutArrangements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value8.90.4-1.40.00.1-1.8-3.4-11.2-29.2-7.2-7.2-5.9-4.40.73.08.6
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases us-gaap:ContingentConsiderationByType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases

mtz:EarnoutArrangements


Fair
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value400.00.07.20.0290.01.0150.00.00.01.51264250.00.00.00.00.00.00.00.0-1.40.0248.70.03.3260.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases100.00.00.0100.00.0100.00.0100.0100.00.00.00.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.00.0100.0100.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements us-gaap:ContingentConsiderationByType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

mtz:EarnoutArrangements


Fair
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value460.00.0500.05.00.0300.00.00.0230.00.00.0180.05.3100.02.85.5320.00.11.3470.05.80.02.00.6
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.00.00.0100.00.0100.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements us-gaap:ContingentConsiderationByType, us-gaap:FairValueByLiabilityClass

mtz:EarnoutArrangements, mtz:MandatorilyRedeemableStock


Fair
Period End2021-06-30
Value2.1
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements4.5

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3838343030302920211717161918
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18191717161514131110.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:ContractualRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value500000.0500000.01500000.0800000.01300000.00
Percentage of FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.00.0

us-gaap:FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-31
Value000-200000.0-6400000.00-400000.00400000.00
Percentage of FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments0.00.00.0100.0100.00.0100.00.0100.00.0

us-gaap:FinitelivedIntangibleAssetsAcquired1 us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FinitelivedIntangibleAssetsAcquired1

us-gaap:CustomerRelatedIntangibleAssets


Finitelived
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value263481.30.0400.01.0260.40.00.02.91.911400.72011-0.4
Percentage of FinitelivedIntangibleAssetsAcquired1100.0100.0100.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherIntangibleAssets


Finitelived
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value514.30.00.03.60.00.01.60.00.00.00.30.11.81.50.02.40.30.3
Percentage of FinitelivedIntangibleAssetsAcquired119.49.00.00.08.80.00.06.20.00.00.010.35.315.53.70.011.62.6-75.0

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4.011.9653.3364.545.9272.4074.2813.5534.0222.0524.0315.1014.1622.7582.61.4621.8160.057-1.5790.799-2.2021.0255.5721.1920.9860.4412.3661.4750.9711.6222.6443.1321.0690.683-0.361
Percentage of GainLossOnSalesOfAssetsAndAssetImpairmentCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillAcquiredDuringPeriod


Goodwill
Period End2021-03-312016-03-312015-03-312014-03-31
Value190.00.014
Percentage of GoodwillAcquiredDuringPeriod100.00.00.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:BalanceSheetLocation

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

mtz:GoodwillAccumulatedImpairmentLoss


Goodwill
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-1600000.0-1600000.0-2100000.0-3800000.08800000.07800000.0-2800000.0-1700000.0-1200000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:GoodwillGross


Goodwill
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1800000.01800000.02400000.04300000.0-9900000.0-1400000.03100000.02000000.02300000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss-112.5-112.5-114.3-113.2-112.5-17.9-110.7-117.6-191.7

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-31
Value0.3-0.20.74.00.60.80.1-3.10.82.22.2-0.6
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:ContingentConsiderationByType

mtz:EarnoutArrangements


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.00.00.01.10.00.00.82.2-0.7
Percentage of GoodwillPurchaseAccountingAdjustments142.90.00.0137.50.00.0100.0100.0-31.8

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312011-12-312010-12-31
Value7.5257.3467.6467.4456.8137.8347.5896.9666.5516.264.7757.6715.8245.5856.2237.3996.061.646-0.021-0.0060.4893.1-4.384-0.371-2.638-0.60.0-0.087
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:Confluence


Income
Period End2021-06-30
Value-0.3
Percentage of IncomeLossFromEquityMethodInvestments-4.0

mtz:WahaJVs


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8.67.78.47.77.67.67.56.96.66.34.87.75.85.66.27.46.1
Percentage of IncomeLossFromEquityMethodInvestments114.3104.8109.9103.4111.697.098.899.1100.7100.6100.5100.499.6100.399.6100.0100.7

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate


Income
Period End2020-12-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-31
Value2.5-5.9-0.5-1.43.7-17.91.5120
Percentage of IncomeTaxReconciliationChangeInEnactedTaxRate100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost


Income
Period End2021-06-302021-03-31
Value02300000.0
Percentage of IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost0.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-92.934153-15.62-54.60813034-197.501-4.286108-134.491-124.70519615326-78.62118188-74.121-106.6534810023-85.694-39.41241-78.7-102.015235.767-14.683-54.2711119-4.844-100.004321367.319-43.066247219-3.53161
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerAsset


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value72-26.799-52.66953-38.01-26.311-203.54779-107.451-6.376
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-30.80214-139.322291282.6030.322-40.259-16.0993.821
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-5.3577.96118-7.495-13.328-17.9066.461-10.454-3.789-2.3985.78624-3.916-55.03355-19.38683-2.193.39-15.605-3.623-25.255-6.26819-8.4282.84119-0.5474.379-9.03412-2.167-10.139-6.8110.05.8152.328-1.7624-0.144-2.5621.744.1542.928
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-10.2083.2931123-19.123-11.0765.09319207.375112.709-0.91611-28.25532-11.4121840154.248-28.518-4.1644.84-12.1423.969-10.7299.248-2.052-1.339-21.21817-14.757116.248111.2351.6158.9921.559-3.0590.4448.413-0.02
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:ContractualRights


Indefinite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000-3100000.0700000.0-500000.0900000.0900000.0-2400000.0800000.0-800000.0-1200000.0-400000.01800000.01300000.0300000.0-1000000.0-700000.0
Percentage of IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRevenueExpenseNet

us-gaap:InterestRevenueExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-13.829-12.459-14.264-13.553-14.808-17.004-18.848-19.297-16.623-22.258-22.388-22.33-20.795-17.058-16.045-17.578-14.791-12.597-12.839-13.097-12.639-12.2-12.21-11.964-12.907-10.973-13.174-12.643-12.949-12.003-11.893-12.666-11.838-10.045-9.493-9.446-9.487-8.951
Percentage of InterestRevenueExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRevenueExpenseNet us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinanceReceivables


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.8-0.8-0.9000000000000005-0.9-1.4-1.8-2.0-2.4-2.8-2.9-2.9-3.2-3.1-1.9
Percentage of InterestRevenueExpenseNet5.86.46.36.69.510.610.612.416.813.013.014.314.911.1

us-gaap:LineOfCreditFacilityPeriodicPaymentPrincipal us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityPeriodicPaymentPrincipal

us-gaap:LoansPayable, us-gaap:DomesticLineOfCredit


Line
Period End2020-12-312018-03-312017-12-31
Value2500000.05000000.03100000.0
Percentage of LineOfCreditFacilityPeriodicPaymentPrincipal100.0100.0100.0

us-gaap:LineOfCreditFacilityPeriodicPaymentPrincipal us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:LongtermDebtType

srt:ScenarioForecast, us-gaap:LoansPayable, us-gaap:DomesticLineOfCredit


Line
Period End2021-12-312020-12-31
Value5000000.02500000.0
Percentage of LineOfCreditFacilityPeriodicPaymentPrincipal0.0100.0

us-gaap:MinorityInterestDecreaseFromRedemptions

us-gaap:MinorityInterestDecreaseFromRedemptions


Minority
Period End2021-06-30
Value6.802
Percentage of MinorityInterestDecreaseFromRedemptions100.0

us-gaap:MinorityInterestDecreaseFromRedemptions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Minority
Period End2021-06-30
Value5.429
Percentage of MinorityInterestDecreaseFromRedemptions79.8

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-30
Value1.373
Percentage of MinorityInterestDecreaseFromRedemptions20.2

us-gaap:Parent


Minority
Period End2021-06-30
Value5.429
Percentage of MinorityInterestDecreaseFromRedemptions79.8

us-gaap:MultiemployerPlanEmployerContributionCost

us-gaap:MultiemployerPlanEmployerContributionCost


Multiemployer
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2924128.99.07.1162423
Percentage of MultiemployerPlanEmployerContributionCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MultiemployerPlanEmployerContributionCost us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Multiemployer
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value8.02.22.01.72.11.71.71.21.5
Percentage of MultiemployerPlanEmployerContributionCost26.98.916.019.123.323.910.15.06.4

us-gaap:PensionPlansDefinedBenefit


Multiemployer
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2122107.26.95.4152321
Percentage of MultiemployerPlanEmployerContributionCost73.191.184.080.976.776.189.995.093.6

us-gaap:MultiemployerPlanNumberOfEmployeesCovered us-gaap:Range

us-gaap:MultiemployerPlanNumberOfEmployeesCovered

srt:Maximum


Multiemployer
Period End2020-09-302020-06-302019-09-302019-06-30
Value1469.01469.05349.05349.0
Percentage of MultiemployerPlanNumberOfEmployeesCovered100.0100.0100.0100.0

srt:Minimum


Multiemployer
Period End2020-09-302020-06-302019-09-302019-06-30
Value1452.01424.03814.02117.0
Percentage of MultiemployerPlanNumberOfEmployeesCovered98.896.971.339.6

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:NetIncomeLossAttributableToParentDiluted


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value65113116573610012811943311208026160638140535624-2.692-76.7647.618-3.7-6.26321493312
Percentage of NetIncomeLossAttributableToParentDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value28272525263529292727
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value843000.0371000.03166000.0-616000.0-840000.0-296000.0132000.0-334000.0113000.0-100000.0-1700000.01230000.0-1652000.0-523000.0-788000.0641000.0595000.01178000.0-1832000.0-1454000.0247000.0-5952000.0-824000.0-380000.02176000.0-995000.01123000.01430000.0-3094000.02000.032000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

mtz:AVCT


Other
Period End2021-06-302021-03-31
Value300000.01000000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

mtz:AVCT


Other
Period End2021-06-302021-03-31
Value200000.0800000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

mtz:WahaJVs


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4.9175.12.5-1.7-30.38.3-9.4-11.6-7.2-10.44.13.910
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2.2585.578-12.9423.464-11.563-0.7341.253-1.384-0.1443.043-3.855-2.369-2.142-0.5447.698-1.73-12.902-0.288-1.499-0.106-2.349-0.8810.246-1.047-0.263-0.473-4.819-0.6980.185-0.623
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


Payment
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-30
Value-29.2820.05.00.00.00.00.00.00.05.25
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities100.00.0100.00.00.00.00.00.00.0100.0

us-gaap:PaymentsForAdvanceToAffiliate us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PaymentsForAdvanceToAffiliate

mtz:A2019Acquisitions, srt:Management


Payments
Period End2020-12-31
Value0
Percentage of PaymentsForAdvanceToAffiliate0.0

us-gaap:PaymentsForAdvanceToAffiliate us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CorporateJointVenture


Payments
Period End2021-06-302021-03-31
Value0700000.0
Percentage of PaymentsForAdvanceToAffiliate0.00.0

us-gaap:PaymentsForAdvanceToAffiliate us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:TelecommunicationsEquityMethodInvestees


Payments
Period End2021-06-302021-03-31
Value0200000.0
Percentage of PaymentsForAdvanceToAffiliate0.00.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-2800000.0150000.03000000.000-4843000.000
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.00.00.0100.00.00.0

us-gaap:PaymentsOfDebtExtinguishmentCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:PaymentsOfDebtExtinguishmentCosts

mtz:FourPointEightSevenFivePercentSeniorNotes, us-gaap:SeniorNotes


Payments
Period End2020-09-30
Value3300000.0
Percentage of PaymentsOfDebtExtinguishmentCosts100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-03-31
Value21000.03753000.022000.021000.021000.0572000.011000.012000.010000.012000.0761000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value50088130.758100.0840.00.963930.00.02.3554.3290.078370.00.00.04.1020.00.00.00.00.1481820.013923-10.879261239.6561351.634114.4980.0287.7026017469.313
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.00.0100.00.0100.0100.00.00.0100.0100.00.0100.0100.00.00.00.0100.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired us-gaap:BusinessAcquisition

mtz:A2020Acquisitions


Payments
Period End2021-03-312020-12-312020-09-30
Value23130.0
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired26.599.90.0

mtz:A2021Acquisitions


Payments
Period End2021-06-302021-03-31
Value49990
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired99.7101.5

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

mtz:A2021Acquisitions, us-gaap:SubsequentEvent


Payments
Period End2021-05-062021-02-10
Value420110
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.00.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:PaymentsToAcquireEquityMethodInvestments

mtz:Confluence


Payments
Period End2021-06-30
Value0.6
Percentage of PaymentsToAcquireEquityMethodInvestments100.0

mtz:FMTech


Payments
Period End2021-03-31
Value2.0
Percentage of PaymentsToAcquireEquityMethodInvestments0.0

mtz:TelecommunicationsEquityMethodInvestees


Payments
Period End2021-06-302021-03-31
Value0.02.0
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.0

us-gaap:PaymentsToAcquireLifeInsurancePolicies us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PaymentsToAcquireLifeInsurancePolicies

srt:BoardOfDirectorsChairman


Payments
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value700000.00600000.0500000.000600000.0500000.000600000.0
Percentage of PaymentsToAcquireLifeInsurancePolicies100.00.0100.0100.00.00.0100.0100.00.00.0100.0

srt:ChiefExecutiveOfficer


Payments
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value500000.000700000.0000700000.0000
Percentage of PaymentsToAcquireLifeInsurancePolicies71.40.00.0140.00.00.00.0140.00.00.00.0

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:PaymentsToAcquireOtherInvestments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1.8474.350.020.6594.777120.00.6172.7822.193.1390.61720140.02.6232153245.6930.541.5184433320.0741.619-1.6711.09814-0.284
Percentage of PaymentsToAcquireOtherInvestments100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.6071.5472.461.4761.2751.0911.2221.067-2.861.1591.0110.916-3.9380.8480.766-0.7610.2620.61.5381.8-0.177-0.1060.9240.9250.7950.8960.873-1.451-0.8764.9481.4452.8383.5680.679-0.4521.2180.6211.2484.1226.551
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions us-gaap:AwardType

us-gaap:EmployeeStock


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.81.41.61.62.41.51.31.01.21.21.1
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions0.00.099.6103.497.6101.6102.091.798.2112.5-38.5

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromIssuanceOfUnsecuredDebt0.0

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromLongTermLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value39618191795606758405577618669957838218166968497913614945023483353724854044391066503581233382266268231327209255166234
Percentage of ProceedsFromLongTermLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1.841-0.502-0.712-11.061-2.9990.00.00.00.00.0-0.061-6.240.0-1.0050.2530.8840.248
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsToMinorityShareholders

us-gaap:ProceedsFromPaymentsToMinorityShareholders


Proceeds
Period End2021-06-302020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value6800000.00-719000.0-1000.0000
Percentage of ProceedsFromPaymentsToMinorityShareholders100.00.0100.0100.00.00.00.0

us-gaap:ProceedsFromRepaymentsOfOtherLongTermDebt

us-gaap:ProceedsFromRepaymentsOfOtherLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-12000.0-33000.0-17000.00-12105000.0-334000.07000.0-6000.0-1597000.0-30000.0
Percentage of ProceedsFromRepaymentsOfOtherLongTermDebt100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.5570.00.00.00.6480.00.04.292100.00.00.05.415101.2980.0120.00.430.6950.0
Percentage of ProceedsFromSaleAndMaturityOfOtherInvestments0.0100.00.00.00.0100.00.00.0100.0100.00.00.00.0100.0100.0100.00.0100.00.0100.0100.00.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value6.9256.0357.333119.4988.3637.9137.535108.6549.683158.5025.3826.3786.2166.8580.5114.415-3.3397.9632.24.1695.6172.7861.364.4513.4525.3793.3737.57-10.69153.4111.5772.01.7942.0141.7711.941.1821.3342.4151.418
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-3.3-7.7-2.1131.9101.60.40.45.12.10.50.81.50.40.20.50.90.41.30.4-0.11.40.20.50.70.30.30.61.71.9-0.8113.3024.4371.20.7270.5480.5380.7040.2640.510.8810.644
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

mtz:CrossCountryInfrastructure, us-gaap:Equipment, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.65.03.61.81.00.3187.79.86.0379.0
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

mtz:ConstructionServices, srt:ExecutiveOfficer


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.10.10.10.00.00.2
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.00.00.0100.0

mtz:EquipmentSuppliesAndServices, srt:Management


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value302015231625362517286834
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty30700.020500.015600.00.00.012650.00.00.00.00.00.00.0

mtz:SubcontractingArrangements, srt:Management


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value16291.30.00.00.71.03.14.61.62.11.1
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty16800.029000.01300.00.00.0350.00.00.00.00.00.00.0

mtz:SubcontractingArrangements, us-gaap:Investee


Related
Period End2020-12-312020-09-302020-06-302020-03-31
Value2.52.73.62.7
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty2500.00.00.01350.0

us-gaap:LeaseAgreements, srt:BoardOfDirectorsChairman


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.60.60.70.60.60.60.40.60.70.70.70.9
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty600.0600.0700.00.00.0300.00.00.00.00.00.00.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

mtz:TelecommunicationsEquityMethodInvestees, mtz:SubcontractingArrangements


Related
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.41.83.62.7
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty2400.01800.00.01350.0

us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty

mtz:A2019Acquisitions, mtz:SubcontractingArrangements, srt:Management


Related
Period End2021-06-302021-03-312020-12-312020-09-30
Value200000.0200000.0300000.0600000.0
Percentage of RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty us-gaap:MajorCustomers, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:RelatedCustomer, srt:ExecutiveOfficer


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0400000.0400000.0400000.0400000.0
Percentage of RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty150.0150.0100.050.00.00.00.00.00.00.00.00.0

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfLongTermLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1528.8691532373067175461710836701362622627747616971421447477545283320501498336404984491306157389301192365203263222195201
Percentage of RepaymentsOfLongTermLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RepaymentsOfUnsecuredDebt


Repayments
Period End2020-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.00.01050.00.00.00.01500.00.00.00.0
Percentage of RepaymentsOfUnsecuredDebt0.00.0100.00.00.00.00.0100.00.00.00.00.0

us-gaap:RepaymentsOfUnsecuredDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

mtz:FourPointEightSevenFivePercentSeniorNotes, us-gaap:SeniorNotes


Repayments
Period End2020-08-19
Value400
Percentage of RepaymentsOfUnsecuredDebt0.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

mtz:ConstructionServices, srt:ExecutiveOfficer


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.90.71.54.05.25.22.3
Percentage of RevenueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0

mtz:EquipmentSuppliesAndServices, srt:Management


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.91.10.89999999999999960.91.31.00.70.70.60.30.93.2
Percentage of RevenueFromRelatedParties0.00.0100.0128.686.725.013.513.526.10.00.00.0

us-gaap:RevenueFromRelatedParties us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:CrossCountryInfrastructure, us-gaap:Equipment, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Revenue
Period End2021-03-312020-12-312020-09-302020-06-30
Value0.10.10.20.6
Percentage of RevenueFromRelatedParties0.011.128.640.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value48502841182642536940278.951325
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value795.5113.37.55.817205412
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-03-312020-12-31
Value8400.010490.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-06-302021-03-312020-12-31
Value0.7829.8-1.01
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-06-302021-03-312020-12-31
Value1.192.293.62
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-03-312020-12-31
Value110660.0188560.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.510100.20.95.6100.20.313140.61.60.1270.10.2112.00.11.20.24.40.20.9
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

mtz:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-06-302021-03-312020-12-31
Value0.6651.440.28
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value130110877472779514411592
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312014-06-302014-03-312013-06-302013-03-31
Value18843.045667.039596.0100660.053399.024122.023038.028244.035732.031047.035134.026968.0348840.067556.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesOther us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesOther

us-gaap:CommonStock


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7747.047252.094553.048489.013823.022801.028092.035531.031027.0-71647.029002.025378.023300.0
Percentage of StockIssuedDuringPeriodSharesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value138080.0299150.01391.0-1424.0694780.0232470.0-920.057.0233360.0-5211.0-8797.0104820.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther

us-gaap:StockIssuedDuringPeriodValueOther


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-19000.0-2400000.01656000.02281000.01314000.0694000.0977000.01135000.01198000.01045000.0-2882000.01135000.0989000.0892000.0
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-20000.0-2400000.01651000.02272000.01309000.0692000.0974000.01133000.01194000.01042000.0-2875000.01132000.0986000.0890000.0
Percentage of StockIssuedDuringPeriodValueOther105.3100.099.799.699.699.799.799.899.799.799.899.799.799.8

us-gaap:CommonStock


Stock
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000.05000.09000.05000.02000.03000.02000.04000.03000.0-7000.03000.03000.02000.0
Percentage of StockIssuedDuringPeriodValueOther-5.30.30.40.40.30.30.20.30.30.20.30.30.2

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-19000.0-2400000.01656000.02281000.01314000.0694000.0977000.01135000.01198000.01045000.0-2882000.01135000.0989000.0892000.0
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0-14000.0-30000.000-69000.0-23000.000-23000.01000.01000.0-10000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value014000.030000.00069000.023000.00023000.0-1000.0-1000.010000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.0-100.0-100.00.00.0-100.0-100.00.00.0-100.0-100.0-100.0-100.0

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockSharesAcquired


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302018-12-312018-09-302018-03-312012-07-312012-06-30
Value0003600000.0002900000.01600000.02000000.02000000.02900000.0
Percentage of TreasuryStockSharesAcquired0.00.00.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockSharesAcquired us-gaap:ShareRepurchaseProgram

mtz:December2018ShareRepurchaseProgram


Treasury
Period End2020-12-312020-09-302020-06-302020-03-31
Value0003000000.0
Percentage of TreasuryStockSharesAcquired0.00.00.083.3

mtz:September2018ShareRepurchaseProgram


Treasury
Period End2020-12-312020-09-302020-06-302020-03-31
Value000600000.0
Percentage of TreasuryStockSharesAcquired0.00.00.016.7

us-gaap:TreasuryStockSharesAcquired us-gaap:StatementEquityComponents

us-gaap:TreasuryStockCommon


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0027085.03569900.000015100.02897000.01600000.0700000.02038700.0
Percentage of TreasuryStockSharesAcquired0.00.00.099.20.00.00.00.099.9100.00.0101.9

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312012-07-312012-06-302012-03-31
Value0.00.00.8021190.00.00.00.60212070299831430.0
Percentage of TreasuryStockValueAcquiredCostMethod0.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:ShareRepurchaseProgram

mtz:December2018ShareRepurchaseProgram


Treasury
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.890
Percentage of TreasuryStockValueAcquiredCostMethod0.00.099.875.9

mtz:September2018ShareRepurchaseProgram


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-03-312018-12-31
Value0.00.00.0280.6120
Percentage of TreasuryStockValueAcquiredCostMethod0.00.00.024.199.7100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:Parent


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.8021190.00.00.00.602120702998
Percentage of TreasuryStockValueAcquiredCostMethod0.00.0100.0100.00.00.00.0100.0100.0100.199.9100.0

us-gaap:TreasuryStockCommon


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.8021190.00.00.00.602120702998
Percentage of TreasuryStockValueAcquiredCostMethod0.00.0100.0100.00.00.00.0100.0100.0100.199.9100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.92.22.02.32.82.92.93.12.12.3
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value1475000.01407000.0957000.0732000.0675000.0717000.0564000.0587000.01105000.01078000.01071000.01433000.01367000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:WriteOffOfDeferredDebtIssuanceCost

mtz:FourPointEightSevenFivePercentSeniorNotes, us-gaap:SeniorNotes


Write
Period End2020-09-30
Value2300000.0
Percentage of WriteOffOfDeferredDebtIssuanceCost100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-05-032021-02-222020-10-26
Value747473
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0

mtz:BeneficialOwnershipInterestPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:BeneficialOwnershipInterestPercentage

mtz:AVCT


Beneficial
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value21.022.021.022.00.210.21
Percentage of BeneficialOwnershipInterestPercentage100.0100.0100.0100.0100.0100.0

mtz:ConsolidatedInterestCoverageRatio us-gaap:Range, us-gaap:LongtermDebtType

mtz:ConsolidatedInterestCoverageRatio

srt:Minimum, us-gaap:DomesticLineOfCredit


Consolidated
Period End2020-12-31
Value3.0
Percentage of ConsolidatedInterestCoverageRatio100.0

mtz:ContractRetainage

mtz:ContractRetainage


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value271314287313290345
Percentage of ContractRetainage100.0100.0100.0100.0100.0100.0

mtz:ContractWithCustomerLiabilityDeferredRevenueCurrent

mtz:ContractWithCustomerLiabilityDeferredRevenueCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value217240203349316181184227
Percentage of ContractWithCustomerLiabilityDeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0

mtz:DeferredTaxLiabilitiesRevenueRecognition

mtz:DeferredTaxLiabilitiesRevenueRecognition


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value22202111
Percentage of DeferredTaxLiabilitiesRevenueRecognition100.0100.0100.0100.0

mtz:EquityInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:EquityInvestmentOwnershipPercentage

mtz:AVCT


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value8.09.09.09.00.090.21
Percentage of EquityInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0

mtz:EquityInvestmentWithoutReadilyDeterminableFairValueOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:EquityInvestmentWithoutReadilyDeterminableFairValueOwnershipPercentage

mtz:CrossCountryInfrastructure, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-03-312019-12-312019-09-30
Value15.015.015.015.00.150.150.15
Percentage of EquityInvestmentWithoutReadilyDeterminableFairValueOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0

mtz:EquityMethodInvestmentNegativeAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:EquityMethodInvestmentNegativeAmount

mtz:CommunityCondotteDeMoyaJVLLC


Equity
Period End2021-06-302021-03-312020-12-312020-09-30
Value-1600000.0-2000000.02000000.0-1700000.0
Percentage of EquityMethodInvestmentNegativeAmount100.0100.0100.0100.0

mtz:EstimatedCostsToCompleteProjectsSecuredByBonds us-gaap:GuaranteeObligationsByNature

mtz:EstimatedCostsToCompleteProjectsSecuredByBonds

us-gaap:PerformanceGuarantee


Estimated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value7247732632261881621941781796153484346
Percentage of EstimatedCostsToCompleteProjectsSecuredByBonds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:FinanceLeaseAndOtherObligations

mtz:FinanceLeaseAndOtherObligations


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value313302288300286298305282255183
Percentage of FinanceLeaseAndOtherObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:FinanceLeaseLiabilityTobePaidafterYearFour

mtz:FinanceLeaseLiabilityTobePaidafterYearFour


Finance
Period End2021-06-302020-09-30
Value1000000.0200000.0
Percentage of FinanceLeaseLiabilityTobePaidafterYearFour100.0100.0

mtz:GoodwillImpairmentTestingMeasurementInput us-gaap:Range, us-gaap:MeasurementInputType

mtz:GoodwillImpairmentTestingMeasurementInput

srt:Maximum, us-gaap:MeasurementInputDiscountRate


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15.00.160.160.1550.145
Percentage of GoodwillImpairmentTestingMeasurementInput100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:MeasurementInputDiscountRate


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value13.00.130.110.130.13
Percentage of GoodwillImpairmentTestingMeasurementInput86.781.268.883.989.7

srt:Minimum, us-gaap:MeasurementInputLongTermRevenueGrowthRate


Goodwill
Period End2020-12-312019-12-312018-12-312016-12-31
Value2.50.030.0240.03
Percentage of GoodwillImpairmentTestingMeasurementInput16.718.815.020.7

mtz:LesseeOperatingLeaseLiabilityTobePaidafterYearFour

mtz:LesseeOperatingLeaseLiabilityTobePaidafterYearFour


Lessee
Period End2021-06-302021-03-312020-09-30
Value241930
Percentage of LesseeOperatingLeaseLiabilityTobePaidafterYearFour100.0100.0100.0

mtz:LongtermDebtandFinanceLeaseObligationsIncludingCurrentMaturitiesGross

mtz:LongtermDebtandFinanceLeaseObligationsIncludingCurrentMaturitiesGross


Longterm
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value15981342131813201253143014441417
Percentage of LongtermDebtandFinanceLeaseObligationsIncludingCurrentMaturitiesGross100.0100.0100.0100.0100.0100.0100.0100.0

mtz:LossContingencyRangeOfPossibleLossMaximumPerEmployee us-gaap:ProductOrService, us-gaap:LossContingenciesByNatureOfContingency

mtz:LossContingencyRangeOfPossibleLossMaximumPerEmployee

us-gaap:GroupPolicies, us-gaap:UninsuredRisk


Loss
Period End2020-12-31
Value600000.0
Percentage of LossContingencyRangeOfPossibleLossMaximumPerEmployee100.0

mtz:NoncontrollingInterestPercentageOfVotingInterestsAcquired

mtz:NoncontrollingInterestPercentageOfVotingInterestsAcquired


Noncontrolling
Period End2021-06-30
Value15.0
Percentage of NoncontrollingInterestPercentageOfVotingInterestsAcquired100.0

mtz:ProportionatelyConsolidatedJointVentureOwnershipPercentage us-gaap:Ownership, us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:ProportionatelyConsolidatedJointVentureOwnershipPercentage

mtz:JointVenturesThatProvideElectricalTransmissionInfrastructureServices, srt:Maximum, us-gaap:CorporateJointVenture


Proportionately
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value90.090.090.090.00.90.90.90.90.90.90.90.90.9
Percentage of ProportionatelyConsolidatedJointVentureOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:JointVenturesThatProvideElectricalTransmissionInfrastructureServices, srt:Minimum, us-gaap:CorporateJointVenture


Proportionately
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value85.085.085.085.00.850.850.850.850.850.850.850.850.85
Percentage of ProportionatelyConsolidatedJointVentureOwnershipPercentage94.494.494.494.494.494.494.494.494.494.494.494.494.4

mtz:ProportionatelyConsolidatedJointVentureOwnershipPercentage us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:CanadianJointVenture, us-gaap:CorporateJointVenture


Proportionately
Period End2020-12-312019-12-31
Value35.00.35
Percentage of ProportionatelyConsolidatedJointVentureOwnershipPercentage38.938.9

mtz:JointVentureCivilConstructionProject, us-gaap:CorporateJointVenture


Proportionately
Period End2020-12-31
Value50.0
Percentage of ProportionatelyConsolidatedJointVentureOwnershipPercentage55.6

mtz:JointVentureCivilConstructionProjectMemberDomain, us-gaap:CorporateJointVenture


Proportionately
Period End2020-09-302020-06-30
Value50.00.5
Percentage of ProportionatelyConsolidatedJointVentureOwnershipPercentage55.655.6

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent

mtz:EquipmentSuppliesAndServices, srt:Management


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.5108.95.97.66.4142017
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtz:SubcontractingArrangements, srt:Management


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value14181.40.10.20.60.23.20.4
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent2980.0178.815.71.72.69.41.415.82.3

mtz:SubcontractingArrangements, us-gaap:Investee


Accounts
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.20.40.42.1
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent2.26.85.332.8

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

mtz:TelecommunicationsEquityMethodInvestees, mtz:SubcontractingArrangements


Accounts
Period End2021-06-302021-03-312020-12-31
Value0.50.30.2
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent100.02.92.2

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:CrossCountryInfrastructure, us-gaap:Equipment, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.14.64.21.61.41.40.2124.9
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent1020.044.247.227.118.421.91.460.628.3

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value87488980593994986016061543157810941164122411009789181032113411411317140613061211115012401129917888880907675672452
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedParties us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableRelatedParties

mtz:A2019Acquisitions, mtz:SubcontractingArrangements, srt:Management


Accounts
Period End2021-06-302021-03-312020-12-312020-09-30
Value400000.0600000.0400000.0200000.0
Percentage of AccountsReceivableRelatedParties100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedParties us-gaap:MajorCustomers, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:RelatedCustomer, srt:ExecutiveOfficer


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value800000.0800000.0900000.01000000.0900000.0900000.0800000.0700000.0600000.0
Percentage of AccountsReceivableRelatedParties200.0133.3225.0500.00.00.00.00.00.0

us-gaap:AccountsReceivableRelatedParties us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:ConstructionServices, srt:ExecutiveOfficer


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value700000.03100000.03600000.03900000.04600000.0
Percentage of AccountsReceivableRelatedParties350.00.00.00.00.0

mtz:EquipmentSuppliesAndServices, srt:Management


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302018-12-31
Value400000.0200000.0500000.0500000.0400000.0100000.0100000.0300000.0
Percentage of AccountsReceivableRelatedParties100.033.3125.0250.00.00.00.00.0

us-gaap:AccountsReceivableRelatedParties us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtz:TelecommunicationsEquityMethodInvestees


Accounts
Period End2021-03-31
Value200000.0
Percentage of AccountsReceivableRelatedParties33.3

us-gaap:AccountsReceivableRelatedParties us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

mtz:TelecommunicationsEquityMethodInvestees, mtz:EmployeeLeasingArrangement


Accounts
Period End2021-06-302021-03-312020-12-31
Value500000.0500000.0400000.0
Percentage of AccountsReceivableRelatedParties125.083.3100.0

us-gaap:AccountsReceivableRelatedParties us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

mtz:CommunityCondotteDeMoyaJVLLC, mtz:SubcontractingArrangements, srt:Management


Accounts
Period End2021-06-302021-03-312020-12-312020-09-30
Value2300000.01900000.01900000.02200000.0
Percentage of AccountsReceivableRelatedParties575.0316.7475.01100.0

mtz:CrossCountryInfrastructure, us-gaap:Equipment, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Accounts
Period End2021-03-312020-09-302020-06-30
Value100000.0200000.0100000.0
Percentage of AccountsReceivableRelatedParties16.7100.00.0

us-gaap:AccruedPayrollTaxesCurrentAndNoncurrent

us-gaap:AccruedPayrollTaxesCurrentAndNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-30
Value59595922
Percentage of AccruedPayrollTaxesCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-31
Value9.2122022229.91014131216119.59.08.29.08.88.68.48.39.67.57.78.68.08.21316181515141314117.68.17.97.78.510
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

mtz:A2020Acquisitions


Business
Period End2020-09-302020-06-30
Value96.00.96
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired100.0100.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:BusinessAcquisition, us-gaap:StatementBusinessSegments

mtz:A2020Acquisitions, mtz:CleanEnergyAndInfrastructure


Business
Period End2021-06-302020-12-312020-06-30
Value91.091.096.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired0.00.010000.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:StatementBusinessSegments

mtz:CleanEnergyAndInfrastructure


Business
Period End2021-03-312020-12-312020-06-30
Value91.091.096.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired0.00.010000.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value8.0
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value74
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount0.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value174179199206256274225217196157173171
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh us-gaap:BusinessAcquisition

mtz:A2018Acquisitions


Business
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4.06.05.06.06.07.0
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh2.22.22.22.83.14.5

mtz:A2019Acquisitions


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5162727182404039
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh28.531.235.027.729.917.818.419.9

mtz:A2020Acquisitions


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1213131312
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh0.07.57.36.55.8

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value86
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh0.0

mtz:AllAcquisitions


Business
Period End2021-06-30
Value189
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh0.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-30
Value564834206054302316
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow us-gaap:BusinessAcquisition

mtz:A2019Acquisitions


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value4.02.02.02.02.0
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow8.35.910.03.33.7

mtz:AllAcquisitions


Business
Period End2021-06-30
Value17
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow0.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationLiability

mtz:A2018Acquisitions


Business
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.51.51.51.51.51.50.80.8
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0

mtz:A2019Acquisitions


Business
Period End2020-12-312019-12-312019-09-302019-06-30
Value22221616
Percentage of BusinessCombinationContingentConsiderationLiability1486.71480.01066.71066.7

mtz:A2020Acquisitions


Business
Period End2021-03-312020-12-312020-09-302020-06-30
Value8.38.37.27.2
Percentage of BusinessCombinationContingentConsiderationLiability0.0553.30.00.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value40
Percentage of BusinessCombinationContingentConsiderationLiability0.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value26
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:Range, us-gaap:MeasurementInputType

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput

srt:Maximum, us-gaap:MeasurementInputDiscountRate


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value23.520.020.023.00.2470.247
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput100.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:MeasurementInputDiscountRate


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value12.012.012.012.00.120.12
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput51.160.060.052.248.648.6

srt:WeightedAverage, us-gaap:MeasurementInputDiscountRate


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value13.013.113.114.00.1530.14
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput55.365.565.560.961.956.7

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value92
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value216
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value89
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value147
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther

mtz:A2019Acquisitions, srt:Management


Business
Period End2020-12-31
Value11
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value27
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value65
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value367
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

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

mtz:A2021Acquisitions, mtz:CustomerRelationshipsAndTradeNames


Business
Period End2021-06-30
Value282
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value95
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value541
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value77
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value2.4
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value56
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value182
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

mtz:A2019Acquisitions


Business
Period End2020-12-31
Value216
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

mtz:A2021Acquisitions


Business
Period End2021-06-30
Value629
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet0.0

us-gaap:CapitalizedComputerSoftwareGross

us-gaap:CapitalizedComputerSoftwareGross


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value16116015414914614413812612312212211711511310910810810810710510310410110097949278
Percentage of CapitalizedComputerSoftwareGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedComputerSoftwareNet


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value35363432333431252324262425252324262830313134333534353327
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNet us-gaap:CapitalizedContractCost

us-gaap:CapitalizedContractCostNet

mtz:MobilizationCosts


Capitalized
Period End2021-06-302021-03-312020-12-31
Value2700000.03700000.05500000.0
Percentage of CapitalizedContractCostNet100.0100.0100.0

us-gaap:CashSurrenderValueOfLifeInsurance us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CashSurrenderValueOfLifeInsurance

srt:ExecutiveOfficer


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value232222222120202018
Percentage of CashSurrenderValueOfLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerAssetNetCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1103958969101996599710241222114312441252185915251034922
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractsReceivableClaimsAndUncertainAmountsExpectedToBeCollectedWithinOneYear

us-gaap:ContractsReceivableClaimsAndUncertainAmountsExpectedToBeCollectedWithinOneYear


Contracts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value975951504035272643385656190280146
Percentage of ContractsReceivableClaimsAndUncertainAmountsExpectedToBeCollectedWithinOneYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:ContractualObligation

us-gaap:LoansReceivable


Contractual
Period End2020-12-312020-09-30
Value3000000.06000000.0
Percentage of ContractualObligation100.0100.0

us-gaap:ContractualObligation us-gaap:Range, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

srt:Maximum, mtz:Confluence


Contractual
Period End2021-06-30
Value2500000.0
Percentage of ContractualObligation0.0

us-gaap:ContractualObligation us-gaap:Range, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

srt:Maximum, mtz:Confluence, us-gaap:LoansReceivable


Contractual
Period End2021-03-31
Value2500000.0
Percentage of ContractualObligation0.0

us-gaap:ContractualObligation us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FairValueByAssetClass

mtz:FMTech, us-gaap:EquityMethodInvestments


Contractual
Period End2021-06-302021-03-312020-12-31
Value3000000.03000000.09000000.0
Percentage of ContractualObligation0.00.0300.0

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

us-gaap:DebtInstrumentCarryingAmount

us-gaap:LoansPayable, us-gaap:DomesticLineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-09-192019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value392395397400400400400400400366371376381386391396400250250237250
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevolvingCreditFacility, us-gaap:DomesticLineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value292453219166332339251344660456815648453377300564186279208
Percentage of DebtInstrumentCarryingAmount74.511.48.25.041.783.284.862.893.8177.6121.2213.4167.5115.895.275.2225.874.7117.983.4

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:ForeignLineOfCredit


Debt
Period End2020-09-302016-12-312015-12-31
Value5.11316
Percentage of DebtInstrumentCarryingAmount1.35.66.6

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

mtz:FourPointFivePercentSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2020-08-04
Value600
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312013-12-312012-12-31
Value1512109.77.64.33.3
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredCompensationPlanAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value141110.09.47.7
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312013-12-312012-12-312011-12-312010-12-31
Value14151616101112138.69.410101112131314159.810111212149.98.211
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value419375342271278260257212177168
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value827067543429179.0101112
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312011-12-31
Value0.10.10.20.20.53.82.5
Percentage of DeferredTaxAssetsOperatingLossCarryforwards0.10.10.30.41.412.721.7

us-gaap:ForeignCountry


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value665750382216123.73.74.5
Percentage of DeferredTaxAssetsOperatingLossCarryforwards80.481.475.069.965.055.271.941.134.939.1

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value151111129.09.65.05.36.94.1
Percentage of DeferredTaxAssetsOperatingLossCarryforwards19.116.317.622.425.832.128.158.965.135.7

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
Value12118.47.91213159.39.99.07.6
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
Value3216157.5241720228.3129.6
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3700000.0900000.02400000.01200000.04700000.03100000.05000000.05800000.03900000.02500000.02800000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance


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
Value3128252431272627221614
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill


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
Value5849555672574744323424
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value3035282832374432263420
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value797467520.0
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.00.0

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
Value151016111516111319146.5
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
Value20517914610412611811492706135
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312011-12-312010-12-31
Value7.07.07.1116.7
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0100.0100.0100.0100.0

us-gaap:DueFromAffiliates us-gaap:BusinessAcquisition, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DueFromAffiliates

mtz:A2019Acquisitions, srt:Management


Due
Period End2020-09-30
Value600000.0
Percentage of DueFromAffiliates100.0

mtz:ConstructionManagementFirmSpecializingInSteelBuildingSystems, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Due
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value100000.0100000.0700000.0500000.0400000.01300000.01000000.01000000.0
Percentage of DueFromAffiliates0.00.00.00.00.00.00.00.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2101761351081181238713312510590123108788911911260679983734680737960826368668163433155544038475333
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

mtz:RestrictedStockAndRestrictedStockUnits


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value40453731
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

mtz:WahaJVs


Equity
Period End2021-06-302021-03-312020-12-312020-09-302018-12-312018-09-302018-06-30
Value33.033.033.033.00.330.330.33
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1818171717181818181818181818
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations us-gaap:BalanceSheetLocation, us-gaap:ContingentConsiderationByType

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations

us-gaap:OtherCurrentLiabilities, mtz:EarnoutArrangements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5847484747525457513029272622
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations us-gaap:ContingentConsiderationByType

mtz:EarnoutArrangements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312013-03-312012-12-312012-09-302011-12-31
Value1191341351321321761731511401401181101021171421437980
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations203.4281.4281.1279.0282.0332.7320.1264.2274.8456.2399.0400.4392.3518.60.00.00.00.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations us-gaap:ContingentConsiderationByType, us-gaap:FairValueByLiabilityClass

mtz:EarnoutArrangements, mtz:MandatorilyRedeemableStock


Fair
Period End2021-06-302020-12-31
Value1618
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations28.539.1

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value312302288295
Percentage of FinanceLeaseLiability100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value145142132128
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value167160155166
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value326317302310
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value127115141131
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value500000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value7.42.1116.4
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value34224738
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value746110191
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-302021-03-312020-09-30
Value8111541
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value13141415
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value466439418406387384375340314271246
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value628591563536502463
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value3.53.73.94.0
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value248208184165143129103796762585452505238
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ContractualRights


Finite
Period End2020-12-312019-12-31
Value100.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization4.30.0

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21819117015213111490674837
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization87.991.692.191.991.988.287.085.282.470.7

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value19171413111513111013
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization7.88.47.98.18.111.813.014.817.626.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value45
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value31
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value11
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value15
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value19
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value25
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ContractualRights


Finite
Period End2020-12-312019-12-31
Value730.0
Percentage of FiniteLivedIntangibleAssetsGross100.00.0

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value29728622422319519519912810975
Percentage of FiniteLivedIntangibleAssetsGross403.70.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value26262121192526221920
Percentage of FiniteLivedIntangibleAssetsGross35.80.00.00.00.00.00.00.00.00.0

us-gaap:GoodwillGross

us-gaap:GoodwillGross


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value14581388136613501343133313421260126412581216122212181218121212101112106710651068107010641057
Percentage of GoodwillGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillGross us-gaap:StatementBusinessSegments

mtz:CleanEnergyAndInfrastructure


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302018-12-31
Value164166152152143
Percentage of GoodwillGross11.312.011.211.311.8

mtz:Communications


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value584561562551547541541472472469467467467466466462463420420420420414414
Percentage of GoodwillGross40.140.541.140.840.740.640.337.537.437.338.538.338.438.338.538.241.639.439.539.439.339.039.3

mtz:ElectricalTransmission


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value196150150150150149149149149149149149149149149149149149149149149149149
Percentage of GoodwillGross13.510.811.011.111.211.211.211.911.911.912.312.312.312.312.412.413.514.014.114.014.014.114.2

mtz:OilAndGas1


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value513509501496493489499494499496455462458460377
Percentage of GoodwillGross35.236.736.736.736.736.737.239.239.539.437.537.837.638.035.4

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value127125123118116112121119120118116727172747572706971727268
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss us-gaap:StatementBusinessSegments

mtz:OilAndGas1


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value12712512311811611212111912011811672717469
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GuaranteeObligationsMaximumExposure us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature

us-gaap:GuaranteeObligationsMaximumExposure

srt:Subsidiaries, us-gaap:PerformanceGuarantee


Guarantee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value19191739764640692577551430453233123112108119
Percentage of GuaranteeObligationsMaximumExposure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GuaranteeObligationsMaximumExposure us-gaap:ProductOrService, us-gaap:GuaranteeObligationsByNature, us-gaap:LossContingenciesByNatureOfContingency

us-gaap:AccidentAndHealthInsuranceSegment, us-gaap:SuretyBond, us-gaap:UninsuredRisk


Guarantee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302017-12-31
Value373737373838383434351515
Percentage of GuaranteeObligationsMaximumExposure1.92.14.95.85.66.77.014.928.231.914.012.7

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-31
Value432420354
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31<