MATX


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:AwardType, us-gaap:IncomeStatementLocation
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:CostOfRevenue

us-gaap:CostsAndExpenses
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingCostsAndExpenses

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

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ProfitLoss

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

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ReceivablesNetCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AssetsNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LiabilitiesNoncurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:LongTermDebt
us-gaap:CreditFacility
us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

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:SaleLeasebackTransactionDescription, us-gaap:TypeOfArrangement

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

matx:CapitalExpendituresAndDryDockingIncurredButNotYetPaid
us-gaap:CreditFacility
matx:DebtInstrumentCovenantThresholdLeverageRatio
us-gaap:DebtInstrument
us-gaap:CreditFacility
matx:DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition
us-gaap:DebtInstrument
us-gaap:DebtInstrument
matx:DebtInstrumentThresholdLeverageRatioToTriggerInterestEnhancementPayments

matx:DecreasedInRestrictedCash
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

matx:DeferredLoanFeeReductionDueToPaydown

matx:DilutiveSecuritiesEarningsPerShareEffectOnBasicEarningsPerShare
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
matx:EquityMethodInvestmentIncreaseNewSubsidiaryOfInvestee
us-gaap:ProductOrService
matx:FuelSalesRevenue

matx:IncreaseDecreaseInDeferredDryDockingAmortization

matx:IncreaseDecreaseInDeferredDryDockingPayments

matx:IncreaseDecreaseInOperatingLeaseLiabilities

matx:IncreasedInRestrictedCash
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:ProductOrService
matx:OceanTransportationServicesRevenue

matx:OperatingLeaseRightOfUseAssetsAmortization
us-gaap:ProductOrService
matx:PercentageOfOceanTransportationAndFuelSalesRevenuesDenominatedInForeignCurrency
us-gaap:ProductOrService
matx:PercentageOfTransportationBrokerageAndFreightServicesRevenueDenominatedinforeigncurrency

matx:ProceedsFromJointVenture
us-gaap:TypeOfArrangement
matx:SaleAndLeasebackTransactionTerminationPayment
us-gaap:ProductOrService
matx:ShipManagementServicesRevenue
us-gaap:ProductOrService
matx:SupplyChainManagementAndOtherServicesRevenue
us-gaap:ProductOrService
matx:TerminalAndOtherRelatedServicesRevenue
us-gaap:ProductOrService
matx:TransportationBrokerageAndFreightForwardingServicesRevenue
us-gaap:ProductOrService
matx:VesselManagementAndRelatedServices
us-gaap:ProductOrService
matx:WarehouseAndDistributionServicesRevenue

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:Range, us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:CreditFacility
us-gaap:DebtInstrumentInterestRateDuringPeriod

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:InterestCostsCapitalized

us-gaap:LeaseCost

us-gaap:OperatingLeaseCost

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeOtherNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForConstructionInProcess

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireOtherProductiveAssets

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:VariableLeaseCost

matx:AlternativeMinimumTaxReceivable

matx:CurrentPortionOfMultiemployerPlansWithdrawalLiability
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:CreditFacility
matx:DebtInstrumentCovenantDebtIncurredThresholdAggregatePrincipalAmountOfPriorityDebt
dei:LegalEntity, us-gaap:LongtermDebtType
matx:DebtInstrumentCovenantMinimumWorkingCapital
dei:LegalEntity, us-gaap:LongtermDebtType
matx:DebtInstrumentCovenantRatioMaintenanceOfNetWorth

matx:DeferredChargesAndOther

matx:DeferredLoanFee

matx:DeferredLoanFeeAmortizationExpenseAfterYearFive

matx:DeferredLoanFeeAmortizationExpenseRemainderOfFiscalYear

matx:DeferredLoanFeeAmortizationExpenseYearFive

matx:DeferredLoanFeeAmortizationExpenseYearThree

matx:DeferredLoanFeeAmortizationExpenseYearTwo

matx:DeferredTaxAssetsDeferredCompensation

matx:DeferredTaxAssetsMultiEmployerWithdrawalLiabilities

matx:DeferredTaxAssetsOperatingLeaseLiabilities

matx:DeferredTaxAssetsOperatingLeaseRightOfUseAssets
us-gaap:IncomeTaxAuthority
matx:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxWithNoExpiration

matx:DeferredTaxLiabilitiesDeposits

matx:DeferredTaxLiabilitiesLeaseFinancing
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsLessInterestAmount
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType

matx:DefinedBenefitPlanExpectedFutureBenefitQuarterlyPayments
us-gaap:FairValueByMeasurementBasis, us-gaap:RetirementPlanType
matx:DefinedBenefitPlanPlanAssetsTotal
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
matx:EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndAccruedLiabilities

matx:IncentivesAndOtherBenefitAccrualsCurrent

matx:InsuranceRelatedReceivablesNoncurrent
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
matx:IntangibleAssetsNetExcludingGoodwillRemainingBalance
us-gaap:CreditFacility
matx:LineOfCreditFacilityOptionToIncrease

matx:LongTermDebtExcludingCurrentMaturitiesGross

matx:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour

matx:LongtermPortionOfMultiemployerPlansWithdrawalLiability
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

matx:OperatingLossCarryforwardsNotExpectedToBeRealized

matx:OtherLiabilitiesOtherNoncurrent

matx:PrepaidFuel

matx:PrepaidOperatingExpenses

matx:VesselAndEquipmentSpareParts

us-gaap:AccruedLiabilitiesAndOtherLiabilities
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:BankOverdrafts

us-gaap:CapitalizedComputerSoftwareGross
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:ContractualObligation
us-gaap:CreditFacility
us-gaap:DebtInstrumentFeeAmount
us-gaap:DebtInstrument

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

us-gaap:DeferredCosts

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:Range, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:RetirementPlanType

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
us-gaap:EquityMethodInvestments

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

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:IncomeTaxReceivable

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:StatementBusinessSegments

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongtermDebtPercentageBearingFixedInterestAmount
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongtermDebtPercentageBearingVariableInterestAmount
us-gaap:FairValueByMeasurementBasis
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:MultiemployerPlanPensionInsignificantAccumulatedBenefitObligation
us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName
us-gaap:MultiemployerPlansWithdrawalObligation

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

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PrepaidInsurance

us-gaap:RestrictedCash

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis

us-gaap:SelfInsuranceReserveCurrent

us-gaap:SelfInsuranceReserveNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:ShortTermBorrowings

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Dividends Payable Current And Noncurrent
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Payable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Common Stock Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization

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 ▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▃▃▂▂▂▃▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁██████32.632.632.432.332.332.332.232.232.132.132.032.032.032.031.931.832.332.332.132.132.232.432.632.432.432.432.432.132.132.132.132.132.032.031.931.931.834.034.034.034.034.034.0NANA34.0
us-gaap:CommonStockSharesOutstanding NANA43.2NANANA42.9NANANA42.7NANANA42.5NANANA42.9NANANA43.5NANANA43.2NANANA42.8NANANA42.6NANANA41.7NANANA41.3NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▆▅▅▄▄▄▄▃▂▂▂▂▁▁▆▆▄43.543.443.243.143.143.042.942.942.942.842.742.742.742.742.542.543.243.242.9NANANA43.5NANANA43.2NANANA42.842.842.742.742.642.642.4NA45.3NANANA44.9NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▄▄43.843.8NA43.543.343.3NA43.343.243.1NA43.143.042.9NA43.243.343.4NA43.243.443.8NA44.044.043.9NA43.443.243.3NA43.343.043.0NA42.842.842.3NA42.142.241.8NA41.541.441.3
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁43.543.4NA43.143.143.0NA42.942.842.8NA42.742.742.6NA42.943.143.0NA42.843.143.4NA43.543.543.4NA43.043.042.9NA42.842.742.6NA42.542.341.9NA41.741.741.5NA41.341.241.1
us-gaap:EarningsPerShareBasic █▅▅▄▂▁▂▂▂▁▂▃▂▂█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂3.742.011.991.650.760.090.360.840.430.290.480.970.760.333.930.790.560.160.450.580.420.420.610.950.230.580.650.50.420.080.170.40.470.210.370.450.180.090.040.210.450.120.490.620.70.42
us-gaap:EarningsPerShareDiluted █▅▄▄▂▁▂▂▂▁▂▃▂▂█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂3.711.991.961.630.760.090.360.840.430.290.480.970.760.333.90.790.550.160.440.580.420.410.60.940.230.570.630.50.420.080.170.40.470.210.360.450.180.090.040.210.440.120.480.620.70.42
  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
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁322.2306.1NA273.9243.3278.9NA288.7268.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁322.2306.1NA273.9243.3278.9NA288.7268.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁322.2306.1NA273.9243.3278.9NA288.7268.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems us-gaap:OperatingSegmentsNANA700.1645.2524.1513.9540.7572.1557.9532.4564.9589.4557.1511.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,matx:LogisticsServicesSegmentNANA156.2146.9113.3113.0124.6134.9142.5134.5146.8152.1150.5132.1126.2124.7119.8104.4113.2102.496.888.1NA99.5100.992.7NA112.3115.3NANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,matx:OceanTransportationSegmentNANA543.9498.3410.8400.9416.1437.2415.4397.9418.1437.3406.6379.3389.9419.2392.7370.0406.1398.0370.9366.1NA444.8346.7305.5NA329.5321.1NANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments matx:LogisticsServicesSegment█▅▆▅▃▃▄▄▅▄▅▅▅▄▄▄▃▂▃▂▂▁▁▂▂▁▃▃▃▂▂▂▂▂▂▂▂▁▁▂▂▁192.0151.3156.2146.9113.3113.0124.6134.9142.5134.5146.8152.1150.5132.1126.2124.7119.8104.4113.2102.496.888.193.899.5100.992.7110.3112.3115.397.9101.5104.9106.694.894.694.394.786.692.899.2103.191.3NANANANA
 Operating Margin us-gaap:StatementBusinessSegments matx:OceanTransportationSegment█▆▆▅▄▄▄▄▄▄▄▄▄▃▃▄▃▃▄▄▃▃▄▄▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁682.9560.5543.9498.3410.8400.9416.1437.2415.4397.9418.1437.3406.6379.3389.9419.2392.7370.0406.1398.0370.9366.1401.0444.8346.7305.5333.2329.5321.1294.6309.4310.1310.0299.9303.7307.1299.5279.5282.1281.4274.3238.4NANANANA
  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 _ _█▅▅▄▃▁▂▃▂▁▂▃▂▂▂▃▂▁▂▂▂▂▂▃▂▂▃▂▂▁▂▂▂▂▂▂▂▁▂▂▂▁▂213.9120.2117.798.451.213.025.455.231.017.530.558.646.028.725.361.845.916.436.346.236.134.645.971.833.744.949.445.035.79.917.927.236.518.723.934.232.512.217.836.425.52.742.6NANANA
  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 us-gaap:AwardType,us-gaap:IncomeStatementLocation matx:TimeBasedAndPerformanceBasedShares,us-gaap:SellingGeneralAndAdministrativeExpenses▁█4.74.8NA5.93.03.1NA2.53.03.2NA2.72.82.7NA2.92.32.6NA3.03.42.8NA2.0NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▅▄▄▃▁▂▃▂▂▂▃▂▂█▃▂▁▂▂▂▂▂▃▂▂▁▂▂162.787.172.770.432.93.214.435.717.912.317.641.731.714.4164.433.625.07.716.926.218.819.429.243.111.225.9-3.522.218.6NANANANANANANANANA-12.710.519.5NA13.127.231.6NA
 us-gaap:CostOfRevenue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁284.0273.1NA243.1229.9265.4NA262.6265.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses █▆▆▅▄▄▅▅▅▅▅▅▅▄▄▄▄▃▄▃▃▃▃▄▂▁▂▂▂▂▂▂▂▂▁▁▁▂▃▂▃▁▂▂▁661.0591.6582.4546.8472.9500.9515.3516.9526.9514.9534.4530.8511.1482.7490.8482.1466.6458.0483.0454.2431.6419.6448.9472.5413.9353.3394.1396.8400.7382.6393.0387.8380.1376.0374.4367.2361.7392.8440.3403.8462.7358.4406.6394.3355.6NA
 us-gaap:GrossProfit us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁38.233.0NA30.813.413.5NA26.13.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperations █▅▅▄▂▁▂▂▂▁▂▃▂▂█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁▂▂▂▁▁▂▂▁▂▂▂▁162.587.285.670.932.83.815.636.218.412.520.641.632.614.2166.934.124.07.019.425.018.018.126.641.59.925.027.821.518.13.47.317.220.19.115.719.015.32.83.718.313.21.318.825.622.23.2
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▅▅▄▂▁▂▂▂▁▂▃▂▂▂▃▂▁▂▂▂▂▂▃▂▂▂▂▂▁▁▂▂▁▂▂▂▁▁▂▂▁▂▂▂▁209.9114.3114.495.144.55.020.148.525.713.526.954.941.424.519.955.639.610.129.640.229.629.741.067.129.140.645.140.631.25.814.423.632.915.020.130.230.64.64.529.021.714.531.941.235.45.8
us-gaap:IncomeTaxExpenseBenefit █▇▇▇▇▆▆▇▇▆▇▇▇▇▁▇▇▆▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▇▆▇▇▆▆▇▇▆▇▇▇▆47.427.128.824.211.71.24.512.37.31.06.313.38.810.3-147.021.515.63.110.215.211.611.614.425.619.215.617.319.113.12.47.16.412.85.94.411.215.31.80.810.78.50.913.115.613.23.2
us-gaap:IncomeTaxesPaidNet █▂▃▃▁▂▃▃▁▂▃▃▃▃▃▃▂▃▂▃▃▃▃▃▄▃▃▃▃▂▂▃75.6-0.41.89999999999999813.0-20.7-0.31.50.5-20.8-5.40.60.44.00.22.70.2-0.70.4-0.610.85.5-0.15.87.222.84.28.19.413.6-0.9-12.30.0NANA14.542.3-15.11.010.029.0-14.00.0-86.061.0-21.00.0
us-gaap:InterestExpense ▅▇▄▅██▅▅▅▄▄▄▄▄▅▅▆▆▆▅▆▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▁▅▅▆▅▅▅▆▆▆5.57.34.95.78.28.65.66.26.14.64.34.45.05.05.46.26.36.36.76.06.54.94.94.74.64.34.34.44.54.13.53.63.63.73.84.01.96.16.26.36.16.26.26.36.56.5
us-gaap:InterestPaidNet ▅▅▅▅▆▆▅▆▅▅▅▅▅▅▅▆▆▆▅▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▆▄▆▅█▄▄▁█▅▄4.75.73.84.59.38.65.29.03.04.83.85.63.65.33.47.76.36.54.14.17.44.24.54.64.73.94.64.04.71.94.91.94.92.14.810.8-11.37.04.035.0-7.0-8.0-46.034.0-5.0-8.0
us-gaap:NetIncomeLoss █▅▅▄▂▁▂▂▂▁▂▃▂▂█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂162.587.285.670.932.83.815.636.218.412.520.641.632.614.2166.934.124.07.019.425.018.018.126.641.59.925.027.821.518.13.47.317.220.19.115.619.17.83.81.68.718.75.220.225.728.917.3
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▅▅▄▂▁▂▂▂▁▂▃▂▁█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁162.587.285.670.932.83.815.636.218.412.520.641.632.614.2166.934.124.07.019.425.018.018.126.641.59.925.027.821.518.13.47.317.220.19.1NANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted █▅▅▄▂▁▂▂▂▁▂▃▂▁█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁162.587.285.670.932.83.815.636.218.412.520.641.632.614.2166.934.124.07.019.425.018.018.126.641.59.925.027.821.518.13.47.317.220.19.1NANANANANANANANANANANANA
us-gaap:OperatingCostsAndExpenses █▆▆▅▄▄▄▅▅▅▅▅▄▄▄▄▃▃▄▃▃▂▃▄▂▁▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁615.6544.7533.9495.8426.3448.3465.5472.6472.8467.1484.3485.5465.9439.3446.0436.1422.9412.2441.4411.4389.9376.4402.6424.8364.5318.2355.0363.8366.9347.8361.0353.6344.9342.8342.1337.0329.0329.7336.2324.7323.0NANANANANA
us-gaap:OperatingIncomeLoss █▅▅▄▃▁▂▃▂▁▂▃▂▂▂▃▂▁▂▂▂▂▂▃▂▂▃▂▂▁▂▂▂▂▂▂▂▁▂▂▂▁▂▂▂▁213.9120.2117.798.451.213.025.455.231.017.530.558.646.028.725.361.845.916.436.346.236.134.645.971.833.744.949.445.035.79.917.927.236.518.723.934.232.512.217.836.425.52.742.643.041.211.1
us-gaap:OtherNonoperatingIncomeExpense ▅▅▅▆▅▄▃▂▄▄▄▄▃▄▃█▁▁1.51.41.62.41.50.60.3-0.50.80.60.70.70.40.80.53.5-1.1-0.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁34.328.9NA26.212.313.0NA23.34.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▆▆▅▃▃▄▄▄▃▄▄▄▃▃▄▃▃▃▃▃▂▃▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▂▃▂▂▂▂▁874.9711.8700.1645.2524.1513.9540.7572.1557.9532.4564.9589.4557.1511.4516.1543.9512.5474.4519.3500.4467.7454.2494.8544.3447.6398.2443.5441.8436.4392.5410.9415.0416.6394.7398.3401.4394.2405.0460.2440.2488.2405.6437.6437.3396.8343.1
 us-gaap:Revenues us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁322.2306.1NA273.9243.3278.9NA288.7268.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:SellingGeneralAndAdministrativeExpense █▇██▆▇▇▆▇▇█▇▇▇▇▇▆▆▅▅▅▅▆▆▇▃▄▃▃▂▂▂▂▂▂▁▁▃▄▃▃▃▄▄▃▃58.256.159.458.750.356.652.852.755.056.358.154.554.353.953.753.550.650.748.246.444.745.849.752.254.638.540.336.135.935.033.031.834.433.432.430.628.539.041.137.337.937.742.040.436.938.7
  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 ██▇▇▇▇▇▇▇▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▆▆▆▆▆▆3036.22929.72900.62806.72777.62835.92845.42753.82657.52676.82430.42421.22381.62287.92247.52167.02039.32034.42015.52073.11688.21674.31669.81736.71726.21426.91401.81360.81364.61344.31248.31220.21168.51149.21174.31158.51189.52574.02544.02559.02556.02516.02495.0NANA2495.0
us-gaap:LiabilitiesAndStockholdersEquity ██▇▇▇▇▇▇▇▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▆▆▆▆▆▆3036.22929.72900.62806.72777.62835.92845.42753.82657.52676.82430.42421.22381.62287.92247.52167.02039.32034.42015.52073.11688.21674.31669.81736.71726.21426.91401.81360.81364.61344.31248.31220.21168.51149.21174.31158.51189.52574.02544.02559.02556.02516.02495.0NANA2495.0
us-gaap:StockholdersEquity █▇▆▆▅▅▅▅▅▅▅▅▄▄▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁██████1172.81028.9961.2891.8815.5800.2805.7797.7765.2763.0755.3743.7699.5682.4678.2518.6475.9466.1471.5459.2434.4439.7450.6431.1386.9385.3363.8366.9342.0335.9338.2315.6292.4284.1279.9271.9247.31127.01123.01145.01133.01135.01136.0NANA1136.0
  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 ▅▃▃▃▂▃▃▃▃▃▃▃▂▂▂▃▂▃▂▃▂▂▂▄▃█▇▆▆▆▄▃▂▁▁▁▂▃▂▃▃▂▂402.7313.9305.9289.6273.6308.7289.6299.5289.6306.6318.4301.1283.6268.8266.0303.0281.9287.5274.2310.4253.8258.9277.9348.3322.9555.0519.5464.7478.2457.2348.9312.1253.7215.4234.1210.5236.8289.0275.0286.0298.0283.0264.0NANA264.0
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▇▆▆▆▃▃▂▁▁▁▂▁▁▁▁▁▁17.411.814.412.719.519.921.223.624.015.419.612.112.813.719.824.715.319.513.916.419.220.125.525.515.8325.8293.4230.9223.7229.7114.581.839.111.019.911.535.519.022.017.015.017.014.0NANA14.0
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▅▃▄▂▅▆▇██▅▅▁▁▂▄22.717.119.715.722.525.728.432.332.724.324.512.112.813.719.8NANANA13.9NANANA25.5NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ReceivablesNetCurrent █▆▅▄▃▄▃▄▃▃▄▅▄▃▂▃▃▃▂▄▃▃▃▅▄▃▃▂▂▂▂▁▂▁▁▁▁▁▁▂▂▂▁313.6261.1253.4234.3215.2218.8205.9223.9213.0217.9223.7240.7221.7209.1194.6213.9198.6197.9189.5225.6206.4210.4214.3239.5223.6201.8197.6192.5196.7177.9182.3171.1179.6167.5174.7166.4170.6168.0173.0177.0189.0176.0165.0NANA165.0
us-gaap:OtherAssetsCurrent NANA8.8NANANA9.7NANANA7.7NANANA19.4NANANA18.3NANANA8.8NANANA6.6NANANANANANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▄▃▄▃▇▆▅▅██▅▅▄▅▇▇▇▇▇▂▂▃▄▄▁▁▃▅▄▄▅▂▂▂▂▂▃▃▂▃71.741.038.142.638.970.062.552.052.673.375.148.349.146.051.664.468.070.170.868.428.228.438.141.541.419.620.532.148.840.543.048.324.125.328.626.824.933.032.029.038.0NA33.0NANANA
  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 ███▇▇▇▇▇▆▆▄▄▄▃▃▂▁▁▁2633.52615.82594.72517.12504.02527.22555.82454.32367.92370.22112.02120.12098.02019.11981.51864.01757.41746.91741.3NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross █▇█▇▆▇▇▆▅▅▅▅▅▄▄▃▂▁▁2970.02911.42912.32811.72756.12843.02836.72706.52603.42653.42615.22641.42617.42508.32444.22356.52230.82173.42151.9NANANA1988.9NANANA1798.2NANANA1794.81783.11782.21782.91770.81779.81771.32962.02962.02947.02922.02905.02901.0NANA2901.0
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▆▅▅▄▃▆▅▅▄▆▆▇█▇▇▆▅▅▄▃▂▂▁▂1254.21227.41222.41197.11177.71253.41238.61221.01204.71267.21248.61294.21310.31293.31278.51257.31241.81222.61202.71183.81165.61147.91128.61153.8NANA1107.0NANANA1059.41046.91038.21023.91008.31003.3988.31348.01328.01308.01288.01272.01250.0NANA1250.0
us-gaap:PropertyPlantAndEquipmentNet ███▇▇▇▇▆▆▆▆▆▅▅▄▄▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▂▂▂▂▇▇▇▇▇█1715.81684.01689.91614.61578.41589.61598.11485.51398.71386.21366.61347.21307.11215.01165.71099.2989.0950.8949.2908.1873.3857.4860.3839.9839.2678.7691.2706.3721.4722.9735.4736.2744.0759.0762.5776.5783.01614.01634.01639.01634.01633.01651.0NANA1651.0
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█████▇50.147.548.755.277.574.376.283.786.791.387.079.194.496.793.287.887.387.382.475.872.269.066.468.268.967.864.463.260.157.857.656.659.059.759.659.558.7353.0347.0349.0341.0332.0329.0NANA329.0
us-gaap:Goodwill ████████████████████▆▆▆▆▆▁▁327.8327.8327.8327.8327.8327.8327.8327.8327.8327.8327.8323.7323.7323.7323.7323.7323.7323.7323.7324.1245.1241.6241.6248.3247.127.427.4NANANA27.4NANANA27.0NANANA27.0NANANA27.0NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▁▂▂▃▃▃▄▄▄▅▅▆▆▆▇▇██186.5189.3192.0194.7197.5200.2202.9205.7208.4211.2214.0216.8219.6222.4225.2228.0230.9233.7236.6NANANA139.1NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA164.7NANANANANANANANANANANANANANANA209.3239.1135.4137.2139.1140.9141.7NA2.5NANANA3.8NANANA3.9NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerLists▁▁▂▂▃▃▃▄▄▄▅▅▆▆▆▇▇██159.2162.0164.7167.4170.2172.9175.6178.4181.1183.9186.7189.5192.3195.1197.9200.7203.6206.4209.3NANANANANANANA2.5NANANA3.6NANANA3.5NANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▄█▃▂▂▄▄▂▁▂257.1279.0251.4244.3241.9253.8256.1246.0238.5243.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▂▁▁▁▁▁▂▂▂▂▂▃▄▄▄▁▁▁▁▁▁▁▁▄▄▃▃▅▃▃▃▆▅▆▆▅▅█▇▇▇▇▆38.434.533.030.628.929.337.849.649.950.249.575.679.380.884.530.130.930.129.128.129.129.626.979.478.968.169.396.374.175.475.2115.3111.8115.1118.1112.0111.0164.0144.0150.0154.0141.0126.0NANA126.0
  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:AccountsPayableAndAccruedLiabilitiesCurrent ▇▅█▂▃▇▁279.6259.9283.1245.4247.4275.7235.7NANANA246.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ███▆▆▇▆▆▆▆▅▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▁▂▁▁▁▁▁▁▁▁▃▃▃▃▅▄532.3519.1511.5453.6449.6470.9436.7437.7425.4411.1370.8325.7315.5275.6286.3284.5276.0261.3279.2290.2289.7261.2297.6298.1306.7223.8223.5204.8221.7199.3200.6189.3206.1185.8193.4193.9207.7276.0278.0285.0284.0383.0353.0NANA353.0
us-gaap:LongTermDebtCurrent █▇▇▆▆▆▆▆▆▅▅▅▄▄▃▃▄▄▄▃▂▂▂▂▃▂▂▂▂▁▁65.059.259.253.450.553.448.448.453.645.242.142.136.336.530.829.231.331.631.826.321.821.722.022.224.321.621.617.117.112.512.5NANANA16.4NANANA17.5NANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent ▆█▃▁▁▂▂84.791.072.463.963.565.566.6NANA54.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent NANA2.1NANANA4.5NANANA2.2NANANANANANANANANANANANA58.677.320.726.925.838.930.432.120.325.118.524.022.226.947.042.049.055.0NA50.0NANANA
us-gaap:TaxesPayableCurrent NANA11.7NANANA2.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 ▆▆▇▇▇██▇▇▇▆▆▆▆▆▆▆▆▅▆▃▃▃▄▄▂▂▂▂▂▁▁▁▁▁▁▁▅▅▄▅▃▄1331.11381.71427.91461.31512.51564.81603.01518.41466.91502.71304.31351.81366.61329.91283.01363.91287.41307.01264.81323.7964.1973.4921.61007.51032.6817.8814.5789.1800.9809.1709.5715.3670.0679.3701.0692.7734.51171.01143.01129.01139.0998.01006.0NANA1006.0
us-gaap:LongTermDebt ▅▅▆▇▇██▇▇▇▇▇█▇▇▇▆▆▆▆▃▃▂▃▃▂▂▂▂▂▁▁▁▁▁▁▂▄▄▄661.5698.9760.1823.6890.0924.9958.4883.0844.6868.1856.4908.1932.5903.6857.1839.3753.9780.3738.9812.4462.8481.2429.9481.5516.6371.2373.6377.5379.9383.6286.1289.9292.4301.1319.1328.6372.8541.0559.0570.0NANA522.0NANANA
us-gaap:LongTermDebtNoncurrent ▄▅▆▆▇██▇▇▇▇███▇▇▆▆▆▇▃▃▂▃▃▂▂▂▂▂▁▁▁▁▁▁▂▄▄▄▄▂▂581.5624.3685.6754.5823.5871.5910.0834.6791.0822.9814.3866.0896.2867.1826.3810.1722.6748.7707.1786.1441.0459.5407.9459.3492.3349.6352.0360.4362.8371.1273.6277.4280.0283.7302.7307.2344.4541.0507.0503.0510.0374.0386.0NANA386.0
us-gaap:LongTermDebtAndCapitalLeaseObligations ▅▅▆▆▇██▇▇▇▇███▇▇▆▆▆▇▃▃▂▃▃▂▂▂▂▂▁596.5639.7700.9770.2839.5871.5910.0834.6791.0822.9814.3866.0896.2867.1826.3810.1722.6748.7707.1786.1441.0459.5407.9459.3492.3349.6352.0360.4362.8371.1273.6NANANA302.7NANANA180.0NANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▆▄▂▁▁404.9396.1389.6370.9348.8340.2337.6NANANA312.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent NANA82.0NANANA73.4NANANA79.4NANANA75.166.5106.4104.9108.5103.4107.2106.7109.3115.3117.8119.2118.667.872.674.374.4106.0109.4108.3108.0103.3105.1160.0168.0140.0139.0137.0135.0NANA135.0
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanTaxStatus,us-gaap:RetirementPlanType us-gaap:NonqualifiedPlan,us-gaap:PensionPlansDefinedBenefitNANA2.6NANANA2.3NANANA2.4NANANA2.7NANANA3.3NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanTaxStatus,us-gaap:RetirementPlanType us-gaap:QualifiedPlan,us-gaap:OtherPostretirementBenefitPlansDefinedBenefitNANA28.1NANANA25.0NANANA21.0NANANA26.5NANANA24.1NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanTaxStatus,us-gaap:RetirementPlanType us-gaap:QualifiedPlan,us-gaap:PensionPlansDefinedBenefitNANA51.3NANANA46.1NANANA56.0NANANA45.9NANANA47.6NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▇▇▇▇▇▇▇▇▇▇█████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂162.2163.7165.8147.6153.7155.9157.4157.9163.0165.2177.3174.3170.6171.2171.542.339.541.540.338.537.538.437.739.338.835.735.536.835.436.735.435.038.238.238.433.433.051.050.057.055.055.054.0NANA54.0
us-gaap:OperatingLeaseLiabilityNoncurrent ▁█▃▄▃██▄▄▇182.5197.6186.9188.3186.5197.2198.0190.0189.0196.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA53.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA47.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA31.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA23.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA65.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 █▇▆▆▅▅▅▅▅▅▅▅▄▄▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁██████1172.81028.9961.2891.8815.5800.2805.7797.7765.2763.0755.3743.7699.5682.4678.2518.6475.9466.1471.5459.2434.4439.7450.6431.1386.9385.3363.8366.9342.0335.9338.2315.6292.4284.1279.9271.9247.31127.01123.01145.01133.01135.01136.0NANA1136.0
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:StatementBusinessSegments matx:SsaTerminalsLlc,matx:OceanTransportationSegmentNANA125.7NANANA202.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▃▃▂▂▂▃▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁██████32.632.632.432.332.332.332.232.232.132.132.032.032.032.031.931.832.332.332.132.132.232.432.632.432.432.432.432.132.132.132.132.132.032.031.931.931.834.034.034.034.034.034.0NANA34.0
us-gaap:AdditionalPaidInCapitalCommonStock █▇█▇▇▇▇▇▇▆▆▆▆▆▆▅▆▅▆▅▅▅▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▁▁316.5312.0321.5312.6306.7304.7306.2303.2300.7297.8297.8293.7291.2288.1289.7285.8287.4285.2289.8286.0283.5282.0287.9284.9283.7278.0274.9267.4264.8262.8261.9260.1255.2252.9252.7251.5246.9252.0239.0236.0234.0228.0223.0NANA223.0
us-gaap:RetainedEarningsAccumulatedDeficit ▇▆▆▅▅▅▅▅▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁██████874.4735.2658.1584.8513.9500.7504.2498.0467.6467.8460.0449.5407.9393.0381.5223.4200.6194.0195.7184.7163.5170.9177.0163.3121.9127.3109.889.467.864.267.767.350.143.440.831.412.3942.0953.0964.0956.0964.0972.0NANA972.0
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅▅▆▆▆▇▇▇▇▇▇▇▇██▆▆▆▆▆▆▆▅▅▅▅████▆▆▆▆▆▆▁▁▂▂▂▂-50.7-50.9-50.8-37.9-37.4-37.5-36.9-35.7-35.2-34.7-34.5-31.5-31.6-30.7-24.9-22.4-44.4-45.4-46.1-43.6-44.8-45.6-46.9-49.5-51.1-52.4-53.3-22.0-22.7-23.2-23.5-43.9-44.9-44.2-45.5-42.9-43.7-90.0-92.0-78.0-80.0-80.0-82.0NANA-82.0
us-gaap:StockIssuedDuringPeriodValueNewIssues █▁-0.2-14.1NA-0.1-1.0-4.5NA0.1-0.1-3.1NA-0.20.3-4.2NANA-0.1-6.7NANANANANANANANANANANANA0.12.20.4-1.00.13.2NANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital█▁-0.2-14.3NA-0.1-1.0-4.6NANA-0.1-3.2NA-0.20.3-4.3NANA-0.1-6.9NANANANANANANANANANANANA0.12.10.4-1.10.13.1NANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStockNA0.2NANANA0.1NA0.1NA0.1NANANA0.1NANANA0.2NANANANANANANANANANANANA0.00.10.00.10.00.1NANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁█4.74.8NA6.03.03.1NA2.53.03.2NA2.72.82.7NA2.92.32.6NANANANANANANANANANANANA1.61.51.51.31.11.1NANANANANANANANANANA
  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 ▆▆█▇▄▄▄▄▄▂▅▅▅▂▄▅▄▁▄▁115.9122.9159.0130.272.068.668.472.274.833.4102.083.989.229.977.983.659.44.070.38.7NANANANANANANANANANANANANANANANA40.7-20.044.025.028.0-11.069.042.034.05.0
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇▆▆▇▇▄▅▇▇▇▆▅▆▅▄▇▇█▁-62.5-37.1-81.4-60.5-14.4-20.7-138.6-101.5-33.6-33.2-28.9-51.0-110.6-69.8-92.3-132.2-28.2-24.27.3-263.9NANANANANANANANANANANANANANANANA28.7-19.0-15.0-24.0-22.0-10.0-73.0-26.0-29.0-22.0
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▁▁▁▂▂▄▃▂▃▂▂▃▄▃▄▂▃▁█-47.8-88.4-73.6-76.5-60.8-50.666.328.9-32.8-0.4-60.7-33.620.533.89.558.0-35.425.8-80.1252.4NANANANANANANANANANANANANANANANA-43.236.0-24.01.0-8.024.04.0-38.011.021.0
  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:AmortizationOfFinancingCosts NANA0.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ██▇▆▆▆▆▆▅▅▅▅▅▅▆▅▅▅▅▅▅▅▅▅▃▃▃▃▃▃▃▃▃▃▃▃▁▆▆▆▆▆▆▆▆▆33.434.530.428.928.627.027.025.924.223.323.623.224.023.626.924.625.124.625.324.223.823.824.323.518.816.817.217.317.717.517.617.117.517.516.518.810.227.028.028.026.027.028.027.026.026.0
us-gaap:IncreaseDecreaseInAccountsPayable ▃▄▅▄▁▇▃▅▃▁█▄▆▂▄▆▄▂▂▃▆▂▃▃▃▄▄▃▄▄▃▂▅▃▄▄▂▃-1.95.620.810.0-24.938.9-2.217.9-9.2-20.446.46.429.4-11.05.923.93.9-13.3-10.2-0.521.1-9.9-7.3-0.2-9.37.47.7-1.22.34.7-2.6-12.519.2-1.91.69.5-13.6-5.4NANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▆█▇▄▄▄▄▄▂▅▅▅▂▄▅▄▁▄▁115.9122.9159.0130.272.068.668.472.274.833.4102.083.989.229.977.983.659.44.070.38.7NANANANANANANANANANANANANANANANA40.7-20.044.025.028.0-11.069.042.034.05.0
us-gaap:NetIncomeLoss █▅▅▄▂▁▂▂▂▁▂▃▂▂█▂▂▁▂▂▂▂▂▃▁▂▂▂▂▁▁▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂162.587.285.670.932.83.815.636.218.412.520.641.632.614.2166.934.124.07.019.425.018.018.126.641.59.925.027.821.518.13.47.317.220.19.115.619.17.83.81.68.718.75.220.225.728.917.3
 us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName matx:SsaTerminalsLlc█▁34.328.9NA26.212.313.0NA23.34.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▆▆█▇▄▄▃▃▄▄▅▃▃▃▄▃▃▃▂▄▄▃▃▂▆▃▄▂▂▂▂▂▂▂▁▁▁▁4.74.86.85.93.03.12.62.53.03.23.92.72.82.73.32.92.32.62.03.03.42.82.62.04.82.83.11.91.91.81.61.51.51.31.11.11.00.8NANANANANANANANA
  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 ▆▇▆▆▇▇▄▅▇▇▇▆▅▆▅▄▇▇█▁-62.5-37.1-81.4-60.5-14.4-20.7-138.6-101.5-33.6-33.2-28.9-51.0-110.6-69.8-92.3-132.2-28.2-24.27.3-263.9NANANANANANANANANANANANANANANANA28.7-19.0-15.0-24.0-22.0-10.0-73.0-26.0-29.0-22.0
  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 ▂▁▁▁▂▂▄▃▂▃▂▂▃▄▃▄▂▃▁█-47.8-88.4-73.6-76.5-60.8-50.666.328.9-32.8-0.4-60.7-33.620.533.89.558.0-35.425.8-80.1252.4NANANANANANANANANANANANANANANANA-43.236.0-24.01.0-8.024.04.0-38.011.021.0
us-gaap:PaymentsOfDividendsCommonStock ▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁█▇▇▇█▇▇▇▇▇10.110.110.110.09.69.59.59.59.19.19.19.08.68.78.68.78.28.38.28.27.97.98.07.97.47.57.47.47.06.96.96.96.56.56.46.413.713.013.013.014.013.013.013.013.013.0
  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:LongtermDebtType matx:SecuredBondsPayable1.22PercentThrough2043▄▄1.22e-061.22e-06NANA1.22e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:SecuredBondsPayable1.35PercentThrough2044▄▄1.35e-061.35e-06NANA1.35e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:SecuredBondsPayable5.27PercentThrough2029▄▄5.2699999999999995e-065.2699999999999995e-06NANA5.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-085.2699999999999995e-08NANANA5.2699999999999995e-08NANANA5.2699999999999995e-08NANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:SecuredBondsPayable5.34PercentThrough2028▄▄5.34e-065.34e-06NANA5.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-085.34e-08NANANA5.34e-08NANANA5.34e-08NANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:TermLoansPayable3.14PercentThrough2031▄▄3.14e-063.14e-06NANA3.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-083.1399999999999997e-08NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:TermLoansPayable3.66PercentThrough2023▄▄3.66e-063.66e-06NANA3.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-083.6600000000000003e-08NANANA3.6600000000000003e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:TermLoansPayable3037PercentThrough2027▄▄3.37e-063.37e-06NANA3.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-083.3700000000000004e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:TermLoansPayable4.16PercentThrough2027▄▄4.16e-064.16e-06NANA4.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-084.1599999999999995e-08NANANA4.1599999999999995e-08NANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType matx:TermLoansPayable4.31PercentThrough2032▄▄4.309999999999999e-064.309999999999999e-06NANA4.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-084.31e-08NANANA4.31e-08NANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value323232323232323232323232323231313232323232323232323232323232323232323131313434343434343433
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.11.21.21.11.11.21.21.21.31.31.31.41.41.51.61.61.61.51.91.92.01.91.92.32.32.42.42.42.62.62.72.82.72.82.71.31.31.31.31.41.41.41.4

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value434242424243434242414141
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value43434343434342424242424242424242434342434342424242424242454444
Percentage of CommonStockSharesOutstanding0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0100.0100.0100.00.00.00.0100.00.00.0108.6108.7108.8

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4343434343434343434342434343434343444443434343434343424242424241414141
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4343434343424242424242424343424343434343434342424242424241414141414141
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value3.742.011.991.650.760.090.360.840.430.290.480.970.760.333.930.790.560.160.450.580.420.420.610.950.230.580.650.50.420.080.170.40.470.210.370.450.180.090.040.210.450.120.490.620.70.42
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
Value3.711.991.961.630.760.090.360.840.430.290.480.970.760.333.90.790.550.160.440.580.420.410.60.940.230.570.630.50.420.080.170.40.470.210.360.450.180.090.040.210.440.120.480.620.70.42
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:AwardType, us-gaap:IncomeStatementLocation

us-gaap:AllocatedShareBasedCompensationExpense

matx:TimeBasedAndPerformanceBasedShares, us-gaap:SellingGeneralAndAdministrativeExpenses


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value4.74.85.93.03.12.53.03.22.72.82.72.92.32.63.03.42.82.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.70.90.60.60.40.50.60.50.50.50.50.40.50.60.70.60.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:TimeBasedAndPerformanceBasedShares us-gaap:SellingGeneralAndAdministrativeExpenses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value162877270323.2143517121741311416433257.71626181929431125-3.52218-12.71019132731
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.210.410.96.30.62.76.23.22.33.17.15.72.831.96.24.91.63.35.24.04.35.97.92.56.5-0.85.04.3-2.82.44.03.06.28.0

Cost Of Revenue

us-gaap:CostOfRevenue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:CostOfRevenue

matx:SsaTerminalsLlc


Cost
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value284273243229265262265
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.538.437.743.951.645.947.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:SsaTerminalsLlc0.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value661591582546472500515516526514534530511482490482466458483454431419448472413353394396400382393387380376374367361392440403462358406394355
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.683.183.284.790.297.595.390.494.496.794.690.191.794.495.188.691.096.593.090.892.392.490.786.892.588.788.989.891.897.595.693.491.295.394.091.591.897.095.791.794.888.492.990.289.6

Gross Profit

us-gaap:GrossProfit us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:GrossProfit

matx:SsaTerminalsLlc


Gross
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3833301313263.8
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.64.82.62.64.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:SsaTerminalsLlc0.00.00.00.00.00.00.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value162878570323.8153618122041321416634247.01925181826419.9252721183.47.317209.11519152.83.718131.31825223.2
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.312.211.06.30.72.96.33.32.33.67.15.92.832.36.34.71.53.75.03.84.05.47.62.26.36.34.94.10.91.84.14.82.33.94.73.90.70.84.22.70.34.35.95.60.9

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20911411495445.020482513265441241955391029402929416729404540315.8142332152030304.64.52921143141355.8
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.016.116.314.78.51.03.78.54.62.54.89.37.44.83.910.27.72.15.78.06.36.58.312.36.510.210.29.27.11.53.55.77.93.85.07.57.81.11.06.64.43.67.39.48.91.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value47272824111.24.5127.31.06.3138.810-147.021153.110151111142519151719132.47.16.4125.94.411151.80.8108.50.91315133.2
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.43.84.13.82.20.20.82.11.30.21.12.31.62.0-28.54.03.00.72.03.02.52.62.94.74.33.93.94.33.00.61.71.53.11.51.12.83.90.40.22.41.70.23.03.63.30.9

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value75-0.41.89999999999999813.0-20.7-0.31.50.5-20.8-5.40.60.44.00.22.70.2-0.70.4-0.6105.5-0.15.87.2224.28.19.413-0.9-12.30.01442-15.11.010.029-14.00.0-86.061-21.00.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.6-0.10.30.5-3.9-0.10.30.1-3.7-1.00.10.10.70.00.50.0-0.10.1-0.12.21.2-0.01.21.35.11.11.82.13.1-0.2-3.00.03.610.5-3.80.22.26.6-2.90.0-19.713.9-5.30.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.57.34.95.78.28.65.66.26.14.64.34.45.05.05.46.26.36.36.76.06.54.94.94.74.64.34.34.44.54.13.53.63.63.73.84.01.96.16.26.36.16.26.26.36.56.5
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.00.70.91.61.71.01.11.10.90.80.70.91.01.01.11.21.31.31.21.41.11.00.91.01.11.01.01.01.00.90.90.90.91.01.00.51.51.31.41.21.51.41.41.61.9

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.75.73.84.59.38.65.29.03.04.83.85.63.65.33.47.76.36.54.14.17.44.24.54.64.73.94.64.04.71.94.91.94.92.14.810-11.37.04.035-7.0-8.0-46.034-5.0-8.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.80.50.71.81.71.01.60.50.90.71.00.61.00.71.41.21.40.80.81.60.90.90.81.11.01.00.91.10.51.20.51.20.51.22.7-2.91.70.98.0-1.4-2.0-10.57.8-1.3-2.3

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
Value162878570323.8153618122041321416634247.01925181826419.9252721183.47.317209.115197.83.81.68.7185.220252817
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 RevenueFromContractWithCustomerExcludingAssessedTax18.612.312.211.06.30.72.96.33.32.33.67.15.92.832.36.34.71.53.75.03.84.05.47.62.26.36.34.94.10.91.84.14.82.33.94.82.00.90.32.03.81.34.65.97.35.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1628770323.836181241321434247.07.317209.11519
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.311.06.30.76.33.32.37.15.92.86.34.71.51.84.14.82.33.94.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value162878570323.8153618122041321416634247.01925181826419.9252721183.47.317209.1
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.312.211.06.30.72.96.33.32.33.67.15.92.832.36.34.71.53.75.03.84.05.47.62.26.36.34.94.10.91.84.14.82.3

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value162878570323.8153618122041321416634247.01925181826419.9252721183.47.317209.1
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.312.211.06.30.72.96.33.32.33.67.15.92.832.36.34.71.53.75.03.84.05.47.62.26.36.34.94.10.91.84.14.82.3

Operating Costs And Expenses

us-gaap:OperatingCostsAndExpenses

us-gaap:OperatingCostsAndExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value615544533495426448465472472467484485465439446436422412441411389376402424364318355363366347361353344342342337329329336324323
Percentage of OperatingCostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax70.476.576.376.881.387.286.182.684.787.785.782.483.685.986.480.282.586.985.082.283.482.981.478.081.479.980.082.384.188.687.985.282.886.985.984.083.581.473.173.866.2

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21312011798511325553117305846282561451636463634457133444945359.917273618233432121736252.742434111
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.416.916.815.39.82.54.79.65.63.35.49.98.35.64.911.49.03.57.09.27.77.69.313.27.511.311.110.28.22.54.46.68.84.76.08.58.23.03.98.35.20.79.79.810.43.2

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value117985113255531173058462823614516394636347133444535
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.7100.0100.0100.0109.6100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.815.39.82.54.79.65.63.35.49.98.35.64.511.49.03.57.79.27.77.613.27.511.310.28.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.015.39.82.50.09.65.63.30.09.98.35.60.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, matx:LogisticsServicesSegment


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value9.6118.95.17.611118.19.19.99.54.24.97.26.91.94.93.52.21.62.92.31.02.42.9
Percentage of OperatingIncomeLoss8.212.117.439.229.920.536.546.329.816.920.714.619.411.715.011.613.57.66.14.64.06.82.25.38.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.81.71.01.42.02.01.51.61.71.70.80.91.31.30.40.90.70.50.40.50.50.30.50.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments matx:LogisticsServicesSegment0.08.17.94.50.08.47.96.00.06.56.33.20.05.85.81.80.03.42.31.82.92.31.12.12.5

us-gaap:OperatingSegments, matx:OceanTransportationSegment


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value10886427.91743199.42148362418543914344233336831434232
Percentage of OperatingIncomeLoss91.887.982.660.870.179.563.553.770.283.179.385.472.388.385.088.496.192.493.995.496.093.297.894.791.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.413.48.11.53.37.73.51.83.88.36.64.83.510.07.63.16.78.57.27.312.77.011.09.67.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments matx:OceanTransportationSegment0.017.410.32.00.010.04.72.40.011.19.06.50.013.09.93.90.010.79.19.015.59.114.412.910.2

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value126.19.6118.95.17.611118.19.19.99.54.24.67.26.91.94.63.52.21.62.32.92.31.03.12.42.90.51.91.72.20.2-2.81.31.30.3-0.72.02.11.5
Percentage of OperatingIncomeLoss6.05.18.212.117.439.229.920.536.546.329.816.920.714.618.211.715.011.612.77.66.14.65.04.06.82.26.35.38.15.110.66.26.01.1-11.73.84.02.5-3.95.58.255.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.50.91.41.81.71.01.42.02.01.51.61.71.70.80.91.31.30.40.90.70.50.40.50.50.50.30.70.50.70.10.50.40.50.1-0.70.30.30.1-0.20.50.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:LogisticsServicesSegment6.74.06.18.17.94.56.18.47.96.06.26.56.33.23.65.85.81.84.13.42.31.82.52.92.31.12.82.12.50.51.91.62.10.2-3.01.41.40.3-0.82.02.01.6

matx:OceanTransportationSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value20111410886427.91743199.4214836242054391431423333436831434642329.4162534182632315.81228275.2
Percentage of OperatingIncomeLoss94.094.991.887.982.660.870.179.563.553.770.283.179.385.481.888.385.088.487.392.493.995.495.096.093.297.893.794.791.994.989.493.894.098.9111.796.296.047.570.279.4106.3192.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.016.015.413.48.11.53.37.73.51.83.88.36.64.84.010.07.63.16.18.57.27.38.812.77.011.010.49.67.52.43.96.18.24.76.78.27.91.42.76.65.61.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:OceanTransportationSegment29.420.419.917.410.32.04.310.04.72.45.111.19.06.55.313.09.93.97.810.79.19.010.915.59.114.413.912.910.23.25.28.211.16.28.810.710.42.14.410.39.92.2

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

matx:AccumulatedOther


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-100000.0-200000.0300000.0-500000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.00.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:AccumulatedOther0.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-06-302020-03-312016-09-302016-03-312015-09-302015-06-302015-03-31
Value-100000.0-200000.0300000.0-500000.0600000.0-100000.0800000.0600000.0100000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.00.1-0.10.1-0.00.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1500000.01400000.01600000.02400000.01500000.0600000.0300000.0-500000.0800000.0600000.0700000.0700000.0400000.0800000.0500000.03500000.0-1100000.0-800000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.20.40.30.10.1-0.10.10.10.10.10.10.20.10.6-0.2-0.2

Profit Loss

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ProfitLoss

matx:SsaTerminalsLlc


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3428261213234.2
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.94.14.12.32.54.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:SsaTerminalsLlc0.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value874711700645524513540572557532564589557511516543512474519500467454494544447398443441436392410415416394398401394405460440488405437437396343
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value49333140241927282521222726184912108.7516.71.91.72.43.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.64.74.56.24.63.85.04.94.54.14.04.74.83.69.62.32.11.810.01.30.40.40.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.64.74.56.24.63.85.04.94.54.14.04.74.83.69.62.32.11.810.01.30.40.40.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value700645524513540572557532564589557511
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, matx:LogisticsServicesSegment


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
Value301816171210.0131411101012
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.52.62.32.82.31.92.52.52.12.01.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.52.62.32.82.31.92.52.52.12.01.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination matx:LogisticsServicesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, matx:OceanTransportationSegment


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
Value18151522119.4131413111115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.12.23.52.31.82.52.42.52.12.12.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.12.23.52.31.82.52.42.52.12.12.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination matx:OceanTransportationSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, matx:LogisticsServicesSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value15614611311312413414213414615215013212612411910411310296889910092112115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.322.821.622.023.023.625.525.326.025.827.025.824.522.923.422.021.820.520.719.418.322.523.325.426.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.322.821.622.023.023.625.525.326.025.827.025.824.522.923.422.021.820.520.719.418.322.523.325.426.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments matx:LogisticsServicesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, matx:OceanTransportationSegment


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value543498410400416437415397418437406379389419392370406398370366444346305329321
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.777.278.478.077.076.474.574.774.074.273.074.275.577.176.678.078.279.579.380.681.777.576.774.673.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.777.278.478.077.076.474.574.774.074.273.074.275.577.176.678.078.279.579.380.681.777.576.774.673.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments matx:OceanTransportationSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

matx:Logistics


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value192151156146113113124134142134146152150132
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.921.322.322.821.622.023.023.625.525.326.025.827.025.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.921.322.322.821.622.023.023.625.525.326.025.827.025.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:Logistics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:OceanTransportation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value682560543498410400416437415397418437406379
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.178.777.777.278.478.077.076.474.574.774.074.273.074.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.178.777.777.278.478.077.076.474.574.774.074.273.074.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:OceanTransportation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1921511561461131131241341421341461521501321261241191041131029688939910092110112115971011041069494949486929910391
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.921.322.322.821.622.023.023.625.525.326.025.827.025.824.522.923.422.021.820.520.719.419.018.322.523.324.925.426.424.924.725.325.624.023.823.524.021.420.222.521.122.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.921.322.322.821.622.023.023.625.525.326.025.827.025.824.522.923.422.021.820.520.719.419.018.322.523.324.925.426.424.924.725.325.624.023.823.524.021.420.222.521.122.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:LogisticsServicesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:OceanTransportationSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value682560543498410400416437415397418437406379389419392370406398370366401444346305333329321294309310310299303307299279282281274238
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.178.777.777.278.478.077.076.474.574.774.074.273.074.275.577.176.678.078.279.579.380.681.081.777.576.775.174.673.675.175.374.774.476.076.276.576.069.061.363.956.258.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.178.777.777.278.478.077.076.474.574.774.074.273.074.275.577.176.678.078.279.579.380.681.081.777.576.775.174.673.675.175.374.774.476.076.276.576.069.061.363.956.258.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:OceanTransportationSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:Revenues

matx:SsaTerminalsLlc


Revenuesus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value322306273243278288268
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.843.042.546.454.350.548.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:SsaTerminalsLlc0.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value58565958505652525556585454535353505048464445495254384036353533313433323028394137373742403638
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.77.98.59.19.611.09.89.29.910.610.39.29.710.510.49.89.910.79.39.39.610.110.09.612.29.79.18.28.28.98.07.78.38.58.17.67.29.68.98.57.89.39.69.29.311.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value303629292900280627772835284527532657267624302421238122872247216720392034201520731688167416691736172614261401136013641344124812201168114911741158118925742544255925562516249524952380
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value2900284524302251
Percentage of Assets100.0100.0100.0100.2
Percentage of Assets100.0100.0100.0100.2
Percentage of Assets us-gaap:OperatingSegments100.0100.0100.0100.0

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

us-gaap:OperatingSegments, matx:LogisticsServicesSegment


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value469420358310
Percentage of Assets16.214.814.813.8
Percentage of Assets16.214.814.813.8
Percentage of Assets us-gaap:OperatingSegments matx:LogisticsServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, matx:OceanTransportationSegment


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value2431242420711941
Percentage of Assets83.885.285.286.4
Percentage of Assets83.885.285.286.4
Percentage of Assets us-gaap:OperatingSegments matx:OceanTransportationSegment100.0100.0100.0100.0

us-gaap:Assets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Assetsus-gaap:
Period End2020-12-312019-12-31
Value15431583
Percentage of Assets53.255.7
Percentage of Assets53.255.7
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value303629292900280627772835284527532657267624302421238122872247216720392034201520731688167416691736172614261401136013641344124812201168114911741158118925742544255925562516249524952380
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Liabilities
Period End2020-12-312019-12-31
Value15431583
Percentage of LiabilitiesAndStockholdersEquity53.255.7
Percentage of Assets53.255.7
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value117210289618918158008057977657637557436996826785184754664714594344394504313863853633663423353383152922842792712471127112311451133113511361136108510721130
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.635.133.131.829.428.228.329.028.828.531.130.729.429.830.223.923.322.923.422.225.726.327.024.822.427.026.027.025.125.027.125.925.024.723.823.520.843.844.144.744.345.145.545.545.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value11111214151516192021211718181517-4.0-4.3-4.4-3.4-3.6-3.8-4.7-6.4-6.5-6.8-7.2
Percentage of StockholdersEquity1.01.11.31.61.92.02.02.52.72.82.92.42.62.72.33.4-0.8-0.9-0.9-0.7-0.8-0.9-1.0-1.5-1.7-1.8-2.0
Percentage of Assets0.40.40.40.50.50.60.60.70.80.80.90.70.80.80.70.8-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.4-0.4-0.5-0.5
Percentage of Assets matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-0.6-0.5-0.6-0.4-0.3-0.4-0.4-0.2-0.1-0.1-0.1-0.5-0.4-0.4-0.3-0.4-0.3-0.4-0.4-0.8-0.7-0.8-0.9-1.0-1.0-0.7-0.7
Percentage of StockholdersEquity-0.1-0.0-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.0
Percentage of Assets matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:AccumulatedOther


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-0.8-0.9-0.7-1.5-1.7-1.6-0.9-1.1-0.4-0.3-0.3-0.3-0.40.60.40.40.40.3-0.50.2-0.4-0.4-0.7-0.2
Percentage of StockholdersEquity-0.1-0.1-0.1-0.2-0.2-0.2-0.1-0.1-0.1-0.0-0.0-0.0-0.10.10.10.10.10.1-0.10.0-0.1-0.1-0.2-0.1
Percentage of Assets-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.0-0.00.0-0.0-0.0-0.0-0.0
Percentage of Assets matx:AccumulatedOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-60.6-61.2-61.7-50.7-50.6-51.3-51.9-54.1-55.3-55.5-55.8-48.4-48.9-49.3-40.6-40.1-40.5-41.0-41.4-40.3-40.8-41.3-41.7-43.3-43.9-44.6-45.0
Percentage of StockholdersEquity-5.2-5.9-6.4-5.7-6.2-6.4-6.4-6.8-7.2-7.3-7.4-6.5-7.0-7.2-6.0-7.7-8.5-8.8-8.8-8.8-9.4-9.4-9.3-10.0-11.3-11.6-12.4
Percentage of Assets-2.0-2.1-2.1-1.8-1.8-1.8-1.8-2.0-2.1-2.1-2.3-2.0-2.1-2.2-1.8-1.9-2.0-2.0-2.1-1.9-2.4-2.5-2.5-2.5-2.5-3.1-3.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value-50.7-50.9-50.8-37.9-37.4-37.5-36.9-35.7-35.2-34.7-34.5-31.5-31.6-30.7-24.9-22.4-44.4-45.4-46.1-43.6-44.8-45.6-46.9-49.5-51.1-52.4-53.3-23.5-43.9-44.9-44.2-45.5-42.9-43.7-92.0-82.0-81.0-96.0-4.0
Percentage of StockholdersEquity-4.3-4.9-5.3-4.2-4.6-4.7-4.6-4.5-4.6-4.5-4.6-4.2-4.5-4.5-3.7-4.3-9.3-9.7-9.8-9.5-10.3-10.4-10.4-11.5-13.2-13.6-14.7-6.9-13.9-15.4-15.6-16.3-15.8-17.7-8.2-7.2-7.5-9.0-0.4
Percentage of Assets-1.7-1.7-1.8-1.4-1.3-1.3-1.3-1.3-1.3-1.3-1.4-1.3-1.3-1.3-1.1-1.0-2.2-2.2-2.3-2.1-2.7-2.7-2.8-2.9-3.0-3.7-3.8-1.9-3.6-3.8-3.8-3.9-3.7-3.7-3.6-3.3-3.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value316312321312306304306303300297297293291288289285287285289287274261260255252252251246239223210204200
Percentage of StockholdersEquity27.030.333.435.137.638.138.038.039.339.039.439.541.642.242.755.160.461.261.563.975.677.482.487.389.090.392.599.821.319.619.419.017.7
Percentage of Assets10.410.611.111.111.010.710.811.011.311.112.312.112.212.612.913.214.114.014.417.219.621.021.321.822.021.521.720.89.48.98.80.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value323232323232323232323232323231313232323232323232323131313434333334
Percentage of StockholdersEquity2.83.23.43.64.04.04.04.04.24.24.24.34.64.74.76.16.86.96.87.28.99.510.210.911.311.411.712.93.03.03.03.13.0
Percentage of Assets1.11.11.11.21.21.11.11.21.21.21.31.31.31.41.41.51.61.61.62.02.32.62.62.72.82.72.82.71.31.41.40.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value87473565858451350050449846746746044940739338122320119419517710967675043403112953972934942911
Percentage of StockholdersEquity74.671.568.565.663.062.662.662.461.161.360.960.458.357.656.343.142.341.841.539.330.220.021.317.115.314.611.55.084.985.686.187.980.6
Percentage of Assets28.825.122.720.818.517.717.718.117.617.518.918.617.117.217.010.39.99.69.710.67.85.45.54.33.83.52.71.037.539.039.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value402313305289273308289299289306318301283268266303281287274310253258277348322555519464478457348312253215234210236289275286298283264264307
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.310.710.510.39.910.910.210.910.911.513.112.411.911.711.814.013.814.113.615.015.015.516.620.118.738.937.134.135.034.028.025.621.718.719.918.219.911.210.811.211.711.210.610.612.9

us-gaap:AssetsCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Assets
Period End2020-12-312019-12-31
Value294300
Percentage of AssetsCurrent96.2103.9
Percentage of Assets10.110.6
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment19.119.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value1711141219192123241519121213192415191316192025251532529323022322911481391119113519221715171414161917
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 Assets0.60.40.50.50.70.70.70.90.90.60.80.50.50.60.91.10.81.00.70.81.11.21.51.50.922.820.917.016.417.19.26.73.31.01.71.03.00.70.90.70.60.70.60.60.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value2217191522252832322424121213191325
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.60.70.60.80.91.01.21.20.91.00.50.50.60.90.71.5

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value313261253234215218205223213217223240221209194213198197189225206210214239223201197192196177182171179167174166170168173177189176165165172
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.38.98.78.37.77.77.28.18.08.19.29.99.39.18.79.99.79.79.410.912.212.612.813.813.014.114.114.114.413.214.614.015.414.614.914.414.36.56.86.97.47.06.66.67.2

us-gaap:ReceivablesNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:TradeAccountsReceivable


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value1.71.71.71.71.71.71.71.71.71.71.077124135134175175174174176150
Percentage of ReceivablesNetCurrent0.50.70.70.70.80.80.80.80.80.80.432.156.264.969.382.288.388.392.282.476.3
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.03.25.25.96.08.18.68.68.710.610.8
Percentage of Assets us-gaap:TradeAccountsReceivable0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value8.89.77.719188.86.6
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.90.90.50.5

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value714138423870625252737548494651646870706828283841411920324840434824252826243332293833
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.41.41.31.51.42.52.21.92.02.73.12.02.12.02.33.03.33.43.53.31.71.72.32.42.41.41.52.43.63.03.44.02.12.22.42.32.11.31.31.11.51.3

Assets Noncurrent

us-gaap:AssetsNoncurrent

us-gaap:AssetsNoncurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2633261525942517250425272555245423672370211221202098201919811864175717461741
Percentage of AssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets86.789.389.589.790.189.189.889.189.188.586.987.688.188.388.286.086.285.986.4

us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Assets
Period End2020-12-312019-12-31
Value12491283
Percentage of AssetsNoncurrent48.250.2
Percentage of Assets43.145.1
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment80.981.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value29702911291228112756284328362706260326532615264126172508244423562230217321511988179817941783178217821770177917712962296229472922290529012901
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets97.899.4100.4100.299.2100.399.798.398.099.1107.6109.1109.9109.6108.8108.7109.4106.8106.8119.1128.3143.8146.1152.5155.1150.8153.6148.9115.1116.4115.2114.3115.5116.3116.3

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

matx:TerminalFacilitiesAndOtherProperty


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1191191191171141141148766666665656564585757434239383837
Percentage of PropertyPlantAndEquipmentGross4.04.14.14.24.24.04.03.22.52.52.52.52.52.62.72.52.62.62.02.12.22.22.21.3
Percentage of Assets3.94.14.14.24.14.04.03.22.52.52.72.72.82.92.92.72.82.82.12.52.83.13.31.5
Percentage of Assets matx:TerminalFacilitiesAndOtherProperty0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:VesselConstructionInProgress


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value23019018548838230951248759954343437629617012512430
Percentage of PropertyPlantAndEquipmentGross8.26.96.517.214.111.919.318.622.720.817.315.412.67.75.85.81.5
Percentage of Assets8.26.96.517.213.911.719.120.024.722.819.016.813.78.46.26.21.8
Percentage of Assets matx:VesselConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:Vessels


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value221822002191191418981966165316471629149014891414144214401433143014231420141613841263126012491225
Percentage of PropertyPlantAndEquipmentGross74.775.675.368.168.969.258.360.962.656.256.953.655.157.458.760.763.865.465.869.670.370.270.541.4
Percentage of Assets73.175.175.668.268.369.358.159.861.355.761.358.460.663.063.866.069.869.870.382.990.2101.0106.448.2
Percentage of Assets matx:Vessels0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value473128172748355381705949352926263432316628251415
Percentage of PropertyPlantAndEquipmentGross1.61.11.00.61.01.71.22.03.12.62.31.91.41.21.11.11.51.51.43.31.61.40.80.5
Percentage of Assets1.61.11.00.61.01.71.22.03.12.62.42.01.51.31.21.21.71.61.54.02.02.01.30.6
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Containers


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value584559572532525528544534516514513512530538543543544537536496466470468481
Percentage of PropertyPlantAndEquipmentGross19.719.219.718.919.118.619.219.819.819.419.619.420.321.522.223.124.424.725.024.926.026.226.516.2
Percentage of Assets19.219.119.719.018.918.619.119.419.419.221.121.222.323.524.225.126.726.426.629.733.337.739.918.9
Percentage of Assets us-gaap:Containers0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value12541227122211971177125312381221120412671248129413101293127812571241122212021183116511471128115311071059104610381023100810039881348132813081288127212501250
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 Assets41.341.942.142.742.444.243.544.345.347.351.453.555.056.556.958.060.960.159.757.169.068.667.666.479.084.985.888.889.185.986.683.152.452.251.150.450.650.150.1

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType

matx:TerminalFacilitiesAndOtherProperty


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value45413836353333302826
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.73.33.12.82.93.03.02.92.92.0
Percentage of Assets1.61.51.61.61.82.02.42.52.51.0
Percentage of Assets matx:TerminalFacilitiesAndOtherProperty0.00.00.00.00.00.00.00.00.00.0

matx:Vessels


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value785818847893840787757718679639
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment64.366.167.869.969.969.868.467.867.448.1
Percentage of Assets27.128.834.939.741.747.254.157.557.925.1
Percentage of Assets matx:Vessels0.00.00.00.00.00.00.00.00.00.0

us-gaap:Containers


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value391378362349326307316310300294
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment32.130.629.127.327.227.328.629.329.822.2
Percentage of Assets13.513.314.915.516.218.422.524.925.611.6
Percentage of Assets us-gaap:Containers0.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value171516841689161415781589159814851398138613661347130712151165109998995094990887385786083983967869170672172273573674475976277678316141634163916341633165116511536
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets56.557.558.357.556.856.156.253.952.651.856.255.654.953.151.950.748.546.747.143.851.751.251.548.448.647.649.351.952.953.858.960.363.766.064.967.065.862.764.264.063.964.966.266.264.5

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

matx:TerminalFacilitiesAndOtherProperty


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value747327287.98.66.08.09.711
Percentage of PropertyPlantAndEquipmentNet4.44.62.02.40.81.00.91.11.30.7
Percentage of Assets2.62.61.11.30.40.50.40.60.80.5
Percentage of Assets matx:TerminalFacilitiesAndOtherProperty0.00.00.00.00.00.00.00.00.00.0

matx:Vessels


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1406835642540575597506542569586
Percentage of PropertyPlantAndEquipmentNet83.252.247.046.460.669.473.273.774.735.9
Percentage of Assets48.529.326.424.028.535.836.143.448.523.1
Percentage of Assets matx:Vessels0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value28355926316628251415
Percentage of PropertyPlantAndEquipmentNet1.72.24.32.23.37.74.13.41.91.0
Percentage of Assets1.01.22.41.21.54.02.02.01.30.6
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:Containers


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value180165150194210188150160168186
Percentage of PropertyPlantAndEquipmentNet10.710.411.016.622.121.921.821.822.111.4
Percentage of Assets6.25.86.28.610.411.310.812.814.37.3
Percentage of Assets us-gaap:Containers0.00.00.00.00.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value50474855777476838691877994969387878782757269666868676463605757565959595958353347349341332329329242
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.72.02.82.62.73.03.33.43.63.34.04.24.14.14.34.34.13.74.34.14.03.94.04.84.64.64.44.34.64.65.05.25.15.14.913.713.613.613.313.213.213.210.2

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

matx:SsaTerminalsLlc


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value504748557774768387
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.72.02.82.62.73.03.6
Percentage of Assets matx:SsaTerminalsLlc0.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value32732732732732732732732732732732732332332332332332332332332424524124124824727272727272727
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.811.211.311.711.811.611.511.912.312.213.513.413.614.114.414.915.915.916.115.614.514.414.514.314.31.92.02.22.31.11.11.1

us-gaap:Goodwill us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1051051051051051051051051051051051051051051051051051051051052626262626262627272727
Percentage of Goodwill32.132.132.132.132.132.132.132.132.132.132.132.532.532.532.532.532.532.532.532.610.911.011.010.710.897.197.198.5100.0100.0100.0
Percentage of Assets3.53.63.63.73.83.73.73.84.03.94.34.34.44.64.74.95.25.25.25.11.61.61.61.51.51.91.92.22.31.11.1
Percentage of Assets matx:LogisticsServicesSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.033.90.00.00.035.90.00.00.038.70.00.00.030.333.935.035.336.6

matx:OceanTransportationSegment


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
Value2222222222222222222222222222222222182182182182182182182182182182152152212150.80.80.40.4
Percentage of Goodwill67.967.967.967.967.967.967.967.967.967.967.967.567.567.567.567.567.567.567.567.489.189.089.089.387.02.92.91.51.5
Percentage of Assets7.37.67.77.98.07.87.88.18.48.39.29.09.29.69.710.110.710.710.810.512.912.812.912.812.50.10.10.00.0
Percentage of Assets matx:OceanTransportationSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.011.30.00.00.012.70.00.00.013.40.00.00.00.10.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value186189192194197200202205208211214216219222225228230233236139
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.16.56.66.97.17.17.17.57.87.98.89.09.29.710.010.511.311.511.78.3

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:CustomerLists, matx:LogisticsServicesSegment


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6266707579
Percentage of IntangibleAssetsNetExcludingGoodwill32.332.632.933.333.7
Percentage of Assets2.12.32.93.34.0
Percentage of Assets us-gaap:CustomerLists matx:LogisticsServicesSegment0.00.00.00.00.0

us-gaap:CustomerLists, matx:OceanTransportationSegment


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value102109116122
Percentage of IntangibleAssetsNetExcludingGoodwill53.553.954.354.5
Percentage of Assets3.53.84.85.5
Percentage of Assets us-gaap:CustomerLists matx:OceanTransportationSegment0.00.00.00.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value8993971021072.7
Percentage of IntangibleAssetsNetExcludingGoodwill46.546.145.745.545.21.9
Percentage of Assets3.13.34.04.65.30.2
Percentage of Assets matx:LogisticsServicesSegment0.00.00.033.036.53.9

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value1642092391351371391401412.53.83.9
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.710.411.58.08.28.38.18.20.20.30.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerLists


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312013-12-312012-12-31
Value1591621641671701721751781811831861891921951972002032062092.53.63.5
Percentage of FiniteLivedIntangibleAssetsNet0.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.094.789.7
Percentage of Assets5.25.55.76.06.16.16.26.56.86.97.77.88.18.58.89.310.010.110.40.20.30.3
Percentage of Assets us-gaap:CustomerLists0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value257279251244241253256246238243251
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.59.58.78.78.78.99.08.99.09.10.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value38343330282937494950497579808430303029282929267978686996747575115111115118112111164144150154141126126204
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.21.11.11.01.01.31.81.91.92.03.13.33.53.81.41.51.51.41.41.71.81.64.64.64.84.97.15.45.66.09.49.610.010.19.79.36.45.75.96.05.65.15.18.6

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value279259283245247275235246
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.28.99.88.78.99.78.310.2

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value532519511453449470436437425411370325315275286284276261279290289261297298306223223204221199200189206185193193207276278285284383353353297
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.517.717.616.216.216.615.315.916.015.415.313.513.212.012.713.113.512.813.914.017.215.617.817.217.815.715.915.016.214.816.115.517.616.216.516.717.510.710.911.111.115.214.114.112.5

us-gaap:LiabilitiesCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Liabilities
Period End2020-12-312019-12-31
Value238201
Percentage of LiabilitiesCurrent46.646.2
Percentage of Assets8.27.1
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment15.412.7

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value655959535053484853454242363630293131312621212222242121171712121617
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.02.01.91.81.91.71.82.01.71.71.71.51.61.41.31.51.61.61.31.31.31.31.31.41.51.51.31.30.91.01.40.7

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-31
Value8491726363656654
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.12.52.32.32.32.32.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value2.14.52.25877202625383032202518242226474249555073
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.13.44.51.51.91.92.92.32.61.72.11.62.01.92.31.81.71.92.22.03.1

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2020-12-312019-12-31
Value112.3
Percentage of TaxesPayableCurrent100.0100.0
Percentage of Assets0.40.1

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value1331138114271461151215641603151814661502130413511366132912831363128713071264132396497392110071032817814789800809709715670679701692734117111431129113999810061006998
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.847.249.252.154.555.256.355.155.256.153.755.857.458.157.162.963.164.262.863.957.158.155.258.059.857.358.158.058.760.256.858.657.359.159.759.861.745.544.944.144.639.740.340.341.9

us-gaap:LiabilitiesNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Liabilities
Period End2020-12-312019-12-31
Value11791179
Percentage of LiabilitiesNoncurrent82.673.6
Percentage of Assets40.741.4
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment76.474.5

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value661698760823890924958883844868856908932903857839753780738812462481429481516371373377379383286289292301319328372541559570522
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.823.926.229.332.032.633.732.131.832.435.237.539.239.538.138.737.038.436.739.227.428.725.727.729.926.026.727.727.828.522.923.825.026.227.228.431.321.022.022.320.9

us-gaap:LongTermDebt us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-30
Value25711231783573792902352552352732952542051758599551954454118152
Percentage of LongTermDebt3.69.414.920.038.639.632.827.829.427.430.131.628.123.920.911.312.77.424.09.511.224.529.5
Percentage of Assets0.92.54.46.412.613.310.58.89.59.711.312.411.19.18.14.24.92.79.42.63.26.88.8
Percentage of Assets us-gaap:RevolvingCreditFacility0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

matx:SecuredBondsPayable1.22PercentThrough2043


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value178182182185185
Percentage of LongTermDebt26.926.023.922.620.9
Percentage of Assets5.96.26.36.66.7
Percentage of Assets matx:SecuredBondsPayable1.22PercentThrough20430.00.00.00.00.0

matx:SecuredBondsPayable1.35PercentThrough2044


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value136136139139139
Percentage of LongTermDebt20.719.518.416.915.7
Percentage of Assets4.54.74.85.05.0
Percentage of Assets matx:SecuredBondsPayable1.35PercentThrough20440.00.00.00.00.0

matx:SecuredBondsPayable5.27PercentThrough2029


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value181819192020222223232424252526262727282829293030313133333434353739
Percentage of LongTermDebt2.82.72.62.42.32.32.32.52.72.72.82.72.72.83.13.13.63.53.93.56.46.27.26.46.28.68.88.79.08.912.311.77.1
Percentage of Assets0.60.60.70.70.80.70.80.80.90.91.01.01.11.11.21.21.31.41.41.41.81.81.81.81.82.22.42.42.52.52.83.21.6
Percentage of Assets matx:SecuredBondsPayable5.27PercentThrough20290.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:SecuredBondsPayable5.34PercentThrough2028


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value161617171818191920202222232324242525262627272828292930303131333537
Percentage of LongTermDebt2.52.42.32.12.12.02.12.22.52.42.62.42.52.62.82.93.43.23.63.25.95.76.75.95.78.08.28.28.48.311.511.06.7
Percentage of Assets0.50.60.60.60.70.70.70.70.80.80.90.91.01.01.11.11.21.21.31.31.61.61.71.61.72.12.22.32.32.42.63.01.5
Percentage of Assets matx:SecuredBondsPayable5.34PercentThrough20280.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable3.14PercentThrough2031


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value160160169169178178188188194194200200200200200200200200200200
Percentage of LongTermDebt24.223.022.320.620.119.319.621.323.022.323.422.021.422.123.323.826.525.627.124.6
Percentage of Assets5.35.55.86.06.46.36.66.87.37.28.28.38.48.78.99.29.89.89.99.6
Percentage of Assets matx:TermLoansPayable3.14PercentThrough20310.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable3.66PercentThrough2023


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1822222727313136414141454550505454595963636868727277777777777777
Percentage of LongTermDebt2.83.33.03.33.13.43.34.14.94.74.85.04.95.55.86.57.37.68.07.913.814.215.915.114.120.920.720.520.420.227.124.3
Percentage of Assets0.60.80.81.01.01.11.11.31.51.51.71.91.92.22.22.52.72.92.93.13.84.14.14.24.25.45.55.75.75.86.26.6
Percentage of Assets matx:TermLoansPayable3.66PercentThrough20230.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable4.16PercentThrough2027


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value3134343636393941444444474749495252555555555555555555555555555555
Percentage of LongTermDebt4.74.94.54.54.14.24.14.75.35.15.25.25.15.55.86.27.07.07.46.811.911.412.811.410.614.814.714.614.514.319.217.2
Percentage of Assets1.01.21.21.31.31.41.41.51.71.71.81.92.02.22.22.42.62.72.72.73.33.33.33.23.23.93.94.04.04.14.44.7
Percentage of Assets matx:TermLoansPayable4.16PercentThrough20270.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable4.31PercentThrough2032


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value2627272929303031323232333335353636373737373737373737373737373737
Percentage of LongTermDebt4.04.03.73.53.33.33.23.63.93.83.83.73.63.94.14.34.84.85.14.68.17.88.77.87.310.110.09.99.99.813.111.8
Percentage of Assets0.91.01.01.01.01.11.11.11.21.21.31.41.41.51.61.71.81.81.91.82.22.22.22.22.22.62.72.82.72.83.03.2
Percentage of Assets matx:TermLoansPayable4.31PercentThrough20320.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value581624685754823871910834791822814866896867826810722748707786441459407459492349352360362371273277280283302307344541507503510374386386406
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.221.323.626.929.630.732.030.329.830.733.535.837.637.936.837.435.436.835.137.926.127.424.426.428.524.525.126.526.627.621.922.724.024.725.826.529.021.019.919.720.014.915.515.517.1

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value596639700770839871910834791822814866896867826810722748707786441459407459492349352360362371273302180
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.621.824.227.430.230.732.030.329.830.733.535.837.637.936.837.435.436.835.137.926.127.424.426.428.524.525.126.526.627.621.925.87.1

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value404396389370348340337312
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.313.513.413.212.612.011.912.9

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value827379756610610410810310710610911511711911867727474106109108108103105160168140139137135135116
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.82.63.33.33.15.25.25.45.06.36.46.56.66.88.48.55.05.35.56.08.79.49.49.28.98.86.26.65.55.45.45.45.44.9

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.62.32.42.73.3
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent3.23.13.03.63.0
Percentage of Assets0.10.10.10.10.2
Percentage of Assets us-gaap:NonqualifiedPlan us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2825212624
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent34.334.126.435.322.2
Percentage of Assets1.00.90.91.21.2
Percentage of Assets us-gaap:QualifiedPlan us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5146564547
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent62.662.870.561.143.9
Percentage of Assets1.81.62.32.02.4
Percentage of Assets us-gaap:QualifiedPlan us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value162163165147153155157157163165177174170171171423941403837383739383535363536353538383833335150575555545448
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.65.75.35.55.55.55.76.16.27.37.27.27.57.62.01.92.02.01.92.22.32.32.32.22.52.52.72.62.72.82.93.33.33.32.92.82.02.02.22.22.22.22.22.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value182197186188186197198190189196
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.06.76.46.76.77.07.06.97.17.3

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value53
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets1.8

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value47
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets1.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value31
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets1.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value23
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.8

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value65
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets2.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value259264254246251259
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets8.99.39.29.39.40.0

us-gaap:OperatingLeaseLiability us-gaap:SaleLeasebackTransactionDescription, us-gaap:TypeOfArrangement

matx:VesselCharterSaleLeasebackTransaction, matx:BareboatCharterAgreement


Operating
Period End2020-12-312019-12-31
Value3647
Percentage of OperatingLeaseLiability13.918.1
Percentage of Assets1.21.7
Percentage of Assets matx:VesselCharterSaleLeasebackTransaction matx:BareboatCharterAgreement0.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value302
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets10.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value43
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets1.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value117210289618918158008057977657637557436996826785184754664714594344394504313863853633663423353383152922842792712471127112311451133113511361136108510721130
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.635.133.131.829.428.228.329.028.828.531.130.729.429.830.223.923.322.923.422.225.726.327.024.822.427.026.027.025.125.027.125.925.024.723.823.520.843.844.144.744.345.145.545.545.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value11111214151516192021211718181517-4.0-4.3-4.4-3.4-3.6-3.8-4.7-6.4-6.5-6.8-7.2
Percentage of StockholdersEquity1.01.11.31.61.92.02.02.52.72.82.92.42.62.72.33.4-0.8-0.9-0.9-0.7-0.8-0.9-1.0-1.5-1.7-1.8-2.0
Percentage of Assets0.40.40.40.50.50.60.60.70.80.80.90.70.80.80.70.8-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.4-0.4-0.5-0.5
Percentage of Assets matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-0.6-0.5-0.6-0.4-0.3-0.4-0.4-0.2-0.1-0.1-0.1-0.5-0.4-0.4-0.3-0.4-0.3-0.4-0.4-0.8-0.7-0.8-0.9-1.0-1.0-0.7-0.7
Percentage of StockholdersEquity-0.1-0.0-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.0
Percentage of Assets matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:AccumulatedOther


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-0.8-0.9-0.7-1.5-1.7-1.6-0.9-1.1-0.4-0.3-0.3-0.3-0.40.60.40.40.40.3-0.50.2-0.4-0.4-0.7-0.2
Percentage of StockholdersEquity-0.1-0.1-0.1-0.2-0.2-0.2-0.1-0.1-0.1-0.0-0.0-0.0-0.10.10.10.10.10.1-0.10.0-0.1-0.1-0.2-0.1
Percentage of Assets-0.0-0.0-0.0-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.0-0.00.0-0.0-0.0-0.0-0.0
Percentage of Assets matx:AccumulatedOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-60.6-61.2-61.7-50.7-50.6-51.3-51.9-54.1-55.3-55.5-55.8-48.4-48.9-49.3-40.6-40.1-40.5-41.0-41.4-40.3-40.8-41.3-41.7-43.3-43.9-44.6-45.0
Percentage of StockholdersEquity-5.2-5.9-6.4-5.7-6.2-6.4-6.4-6.8-7.2-7.3-7.4-6.5-7.0-7.2-6.0-7.7-8.5-8.8-8.8-8.8-9.4-9.4-9.3-10.0-11.3-11.6-12.4
Percentage of Assets-2.0-2.1-2.1-1.8-1.8-1.8-1.8-2.0-2.1-2.1-2.3-2.0-2.1-2.2-1.8-1.9-2.0-2.0-2.1-1.9-2.4-2.5-2.5-2.5-2.5-3.1-3.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value-50.7-50.9-50.8-37.9-37.4-37.5-36.9-35.7-35.2-34.7-34.5-31.5-31.6-30.7-24.9-22.4-44.4-45.4-46.1-43.6-44.8-45.6-46.9-49.5-51.1-52.4-53.3-23.5-43.9-44.9-44.2-45.5-42.9-43.7-92.0-82.0-81.0-96.0-4.0
Percentage of StockholdersEquity-4.3-4.9-5.3-4.2-4.6-4.7-4.6-4.5-4.6-4.5-4.6-4.2-4.5-4.5-3.7-4.3-9.3-9.7-9.8-9.5-10.3-10.4-10.4-11.5-13.2-13.6-14.7-6.9-13.9-15.4-15.6-16.3-15.8-17.7-8.2-7.2-7.5-9.0-0.4
Percentage of Assets-1.7-1.7-1.8-1.4-1.3-1.3-1.3-1.3-1.3-1.3-1.4-1.3-1.3-1.3-1.1-1.0-2.2-2.2-2.3-2.1-2.7-2.7-2.8-2.9-3.0-3.7-3.8-1.9-3.6-3.8-3.8-3.9-3.7-3.7-3.6-3.3-3.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value316312321312306304306303300297297293291288289285287285289287274261260255252252251246239223210204200
Percentage of StockholdersEquity27.030.333.435.137.638.138.038.039.339.039.439.541.642.242.755.160.461.261.563.975.677.482.487.389.090.392.599.821.319.619.419.017.7
Percentage of Assets10.410.611.111.111.010.710.811.011.311.112.312.112.212.612.913.214.114.014.417.219.621.021.321.822.021.521.720.89.48.98.80.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value323232323232323232323232323231313232323232323232323131313434333334
Percentage of StockholdersEquity2.83.23.43.64.04.04.04.04.24.24.24.34.64.74.76.16.86.96.87.28.99.510.210.911.311.411.712.93.03.03.03.13.0
Percentage of Assets1.11.11.11.21.21.11.11.21.21.21.31.31.31.41.41.51.61.61.62.02.32.62.62.72.82.72.82.71.31.41.40.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-312008-12-312007-12-31
Value87473565858451350050449846746746044940739338122320119419517710967675043403112953972934942911
Percentage of StockholdersEquity74.671.568.565.663.062.662.662.461.161.360.960.458.357.656.343.142.341.841.539.330.220.021.317.115.314.611.55.084.985.686.187.980.6
Percentage of Assets28.825.122.720.818.517.717.718.117.617.518.918.617.117.217.010.39.99.69.710.67.85.45.54.33.83.52.71.037.539.039.20.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Stockholders
Period End2020-12-312019-12-31
Value125202
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0
Percentage of Assets4.37.1
Percentage of Assets matx:SsaTerminalsLlc matx:OceanTransportationSegment8.112.8

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value323232323232323232323232323231313232323232323232323232323232323232323131313434343434343433
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.11.21.21.11.11.21.21.21.31.31.31.41.41.51.61.61.61.51.91.92.01.91.92.32.32.42.42.42.62.62.72.82.72.82.71.31.31.31.31.41.41.41.4

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value316312321312306304306303300297297293291288289285287285289286283282287284283278274267264262261260255252252251246252239236234228223223210
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.410.611.111.111.010.710.811.011.311.112.312.112.212.612.913.214.114.014.413.816.816.817.216.416.419.519.619.719.419.521.021.321.822.021.521.720.89.89.49.29.29.18.98.98.8

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value87473565858451350050449846746746044940739338122320019419518416317017716312112710989676467675043403112942953964956964972972934
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.825.122.720.818.517.717.718.117.617.518.918.617.117.217.010.39.89.59.78.99.710.210.69.47.18.97.86.65.04.85.45.54.33.83.52.71.036.637.537.737.438.339.039.039.2

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value-50700000.0-50900000.0-50800000.0-37900000.0-37400000.0-37500000.0-36900000.0-35700000.0-35200000.0-34700000.0-34500000.0-31500000.0-31600000.0-30700000.0-24900000.0-22400000.0-44400000.0-45400000.0-46100000.0-43600000.0-44800000.0-45600000.0-46900000.0-49500000.0-51100000.0-52400000.0-53300000.0-22000000.0-22700000.0-23200000.0-23500000.0-43900000.0-44900000.0-44200000.0-45500000.0-42900000.0-43700000.0-90000000.0-92000000.0-78000000.0-80000000.0-80000000.0-82000000.0-82000000.0-81000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.7-1.7-1.8-1.4-1.3-1.3-1.3-1.3-1.3-1.3-1.4-1.3-1.3-1.3-1.1-1.0-2.2-2.2-2.3-2.1-2.7-2.7-2.8-2.9-3.0-3.7-3.8-1.6-1.7-1.7-1.9-3.6-3.8-3.8-3.9-3.7-3.7-3.5-3.6-3.0-3.1-3.2-3.3-3.3-3.4

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-0.2-14.1-0.1-1.0-4.50.1-0.1-3.1-0.20.3-4.2-0.1-6.70.12.20.4-1.00.13.2
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-0.2-14.3-0.1-1.0-4.6-0.1-3.2-0.20.3-4.3-0.1-6.90.12.10.4-1.10.13.1
Percentage of StockIssuedDuringPeriodValueNewIssues100.0101.4100.0100.0102.2100.0103.2100.0100.0102.4100.0103.0100.095.5100.0110.0100.096.9
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stock
Period End2021-03-312020-03-312019-09-302019-03-312018-03-312017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.20.10.10.10.10.20.00.10.00.10.00.1
Percentage of StockIssuedDuringPeriodValueNewIssues-1.4-2.2100.0-3.2-2.4-3.00.04.50.0-10.00.03.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value4.74.86.03.03.12.53.03.22.72.82.72.92.32.61.61.51.51.31.11.1
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value4.74.86.03.03.12.53.03.22.72.82.72.92.42.61.61.51.51.31.11.1
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.3100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1151221591307268687274331028389297783594.0708.740-20.0442528-11.06942345.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.217.322.720.213.713.312.712.613.46.318.114.216.05.815.115.411.60.813.51.710.3-4.99.65.75.7-2.715.89.68.61.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-62.5-37.1-81.4-60.5-14.4-20.7-138.6-101.5-33.6-33.2-28.9-51.0-110.6-69.8-92.3-132.2-28.2-24.27.3-263.928-19.0-15.0-24.0-22.0-10.0-73.0-26.0-29.0-22.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.1-5.2-11.6-9.4-2.7-4.0-25.6-17.7-6.0-6.2-5.1-8.7-19.9-13.6-17.9-24.3-5.5-5.11.4-52.77.3-4.7-3.3-5.5-4.5-2.5-16.7-5.9-7.3-6.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-47.8-88.4-73.6-76.5-60.8-50.66628-32.8-0.4-60.7-33.620339.558-35.425-80.1252-43.236-24.01.0-8.0244.0-38.01121
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.5-12.4-10.5-11.9-11.6-9.812.35.1-5.9-0.1-10.7-5.73.76.61.810.7-6.95.4-15.450.4-11.08.9-5.20.2-1.65.90.9-8.72.86.1

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2020-12-31
Value400000.0
Percentage of AmortizationOfFinancingCosts100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value33343028282727252423232324232624252425242323242318161717171717171717161810272828262728272626
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.95.62010.0-24.938-2.217-9.2-20.4466.429-11.05.9233.9-13.3-10.2-0.521-9.9-7.3-0.2-9.37.47.7-1.22.34.7-2.6-12.519-1.91.69.5-13.6-5.4
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1151221591307268687274331028389297783594.0708.740-20.0442528-11.06942345.0
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.217.322.720.213.713.312.712.613.46.318.114.216.05.815.115.411.60.813.51.710.3-4.99.65.75.7-2.715.89.68.61.5

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
Value162878570323.8153618122041321416634247.01925181826419.9252721183.47.317209.115197.83.81.68.7185.220252817
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 RevenueFromContractWithCustomerExcludingAssessedTax18.612.312.211.06.30.72.96.33.32.33.67.15.92.832.36.34.71.53.75.03.84.05.47.62.26.36.34.94.10.91.84.14.82.33.94.82.00.90.32.03.81.34.65.97.35.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1628770323.836181241321434247.07.317209.11519
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.612.311.06.30.76.33.32.37.15.92.86.34.71.51.84.14.82.33.94.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ProfitLoss

matx:SsaTerminalsLlc


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3428261213234.2
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.94.14.12.32.54.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax matx:SsaTerminalsLlc0.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value4.74.86.85.93.03.12.62.53.03.23.92.72.82.73.32.92.32.62.03.03.42.82.62.04.82.83.11.91.91.81.61.51.51.31.11.11.00.8
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-62.5-37.1-81.4-60.5-14.4-20.7-138.6-101.5-33.6-33.2-28.9-51.0-110.6-69.8-92.3-132.2-28.2-24.27.3-263.928-19.0-15.0-24.0-22.0-10.0-73.0-26.0-29.0-22.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.1-5.2-11.6-9.4-2.7-4.0-25.6-17.7-6.0-6.2-5.1-8.7-19.9-13.6-17.9-24.3-5.5-5.11.4-52.77.3-4.7-3.3-5.5-4.5-2.5-16.7-5.9-7.3-6.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-47.8-88.4-73.6-76.5-60.8-50.66628-32.8-0.4-60.7-33.620339.558-35.425-80.1252-43.236-24.01.0-8.0244.0-38.01121
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.5-12.4-10.5-11.9-11.6-9.812.35.1-5.9-0.1-10.7-5.73.76.61.810.7-6.95.4-15.450.4-11.08.9-5.20.2-1.65.90.9-8.72.86.1

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10101010.09.69.59.59.59.19.19.19.08.68.78.68.78.28.38.28.27.97.98.07.97.47.57.47.47.06.96.96.96.56.56.46.413131313141313131313
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

matx:SecuredBondsPayable1.22PercentThrough2043


Debt
Period End2021-06-302021-03-312020-06-30
Value1.221.220.0122
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:SecuredBondsPayable1.22PercentThrough20430.00.00.0

matx:SecuredBondsPayable1.35PercentThrough2044


Debt
Period End2021-06-302021-03-312020-06-30
Value1.351.350.0135
Percentage of DebtInstrumentInterestRateStatedPercentage110.7110.7110.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:SecuredBondsPayable1.35PercentThrough20440.00.00.0

matx:SecuredBondsPayable5.27PercentThrough2029


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312004-08-31
Value5.275.270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.05270.0527
Percentage of DebtInstrumentInterestRateStatedPercentage432.0432.0432.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:SecuredBondsPayable5.27PercentThrough20290.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:SecuredBondsPayable5.34PercentThrough2028


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312003-09-30
Value5.345.340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.05340.0534
Percentage of DebtInstrumentInterestRateStatedPercentage437.7437.7437.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:SecuredBondsPayable5.34PercentThrough20280.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable3.14PercentThrough2031


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.143.140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.03140.0314
Percentage of DebtInstrumentInterestRateStatedPercentage257.4257.4257.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:TermLoansPayable3.14PercentThrough20310.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable3.66PercentThrough2023


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value3.663.660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.03660.0366
Percentage of DebtInstrumentInterestRateStatedPercentage300.0300.0300.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:TermLoansPayable3.66PercentThrough20230.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable3037PercentThrough2027


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3.373.370.03370.03370.03370.03370.03370.03370.03370.03370.03370.03370.03370.03370.03370.03370.0337
Percentage of DebtInstrumentInterestRateStatedPercentage276.2276.2276.20.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:TermLoansPayable3037PercentThrough20270.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable4.16PercentThrough2027


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value4.164.160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.04160.0416
Percentage of DebtInstrumentInterestRateStatedPercentage341.0341.0341.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:TermLoansPayable4.16PercentThrough20270.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

matx:TermLoansPayable4.31PercentThrough2032


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value4.314.310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.04310.0431
Percentage of DebtInstrumentInterestRateStatedPercentage353.3353.3353.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations matx:TermLoansPayable4.31PercentThrough20320.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:EmployeeStockOption, matx:Plan2007


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1000.0173000.0196000.0235000.0319000.0403000.0657000.0844000.0954000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value20.8422.321.8121.5421.6721.921.2421.2421.15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312011-12-312010-12-31
Value389337312285348310300531530
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value12713376791791718063
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1816151520226.77.28.37.08.08.06.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value10.010111311124.1
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0

matx:CapitalExpendituresAndDryDockingIncurredButNotYetPaid

matx:CapitalExpendituresAndDryDockingIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.18.8181.31.13.5-1.36.1-1.85.53.7-0.40.10.7-0.30.4-1.32.4-8.57.72.82.17.43.21.91.01.1-1.60.81.3-0.90.30.72.04.1-1.6-1.93.6
Percentage of CapitalExpendituresAndDryDockingIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:DebtInstrumentCovenantThresholdLeverageRatio us-gaap:CreditFacility

matx:DebtInstrumentCovenantThresholdLeverageRatio

us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-31
Value3.5
Percentage of DebtInstrumentCovenantThresholdLeverageRatio100.0

matx:DebtInstrumentCovenantThresholdLeverageRatio us-gaap:DebtInstrument

matx:AmendmentTo2021PrivatePlacementTermLoan


Debt
Period End2021-03-31
Value3.5
Percentage of DebtInstrumentCovenantThresholdLeverageRatio100.0

matx:DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition us-gaap:CreditFacility

matx:DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition

us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-31
Value4.0
Percentage of DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition100.0

matx:DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition us-gaap:DebtInstrument

matx:AmendmentTo2021PrivatePlacementTermLoan


Debt
Period End2021-03-31
Value4.0
Percentage of DebtInstrumentCovenantThresholdLeverageRatioInConnectionWithMaterialAcquisition100.0

matx:DebtInstrumentThresholdLeverageRatioToTriggerInterestEnhancementPayments us-gaap:DebtInstrument

matx:DebtInstrumentThresholdLeverageRatioToTriggerInterestEnhancementPayments

matx:AmendmentTo2021PrivatePlacementTermLoan


Debt
Period End2021-03-31
Value3.25
Percentage of DebtInstrumentThresholdLeverageRatioToTriggerInterestEnhancementPayments100.0

matx:DecreasedInRestrictedCash

matx:DecreasedInRestrictedCash


Decreased
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value350.026702841
Percentage of DecreasedInRestrictedCash100.00.0100.0100.0100.0100.0

matx:DecreasedInRestrictedCash us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:TradeAccountsReceivable


Decreased
Period End2021-06-302020-09-302020-06-30
Value310.026
Percentage of DecreasedInRestrictedCash0.00.0100.0

matx:DeferredLoanFeeReductionDueToPaydown

matx:DeferredLoanFeeReductionDueToPaydown


Deferred
Period End2020-12-31
Value0
Percentage of DeferredLoanFeeReductionDueToPaydown0.0

matx:DilutiveSecuritiesEarningsPerShareEffectOnBasicEarningsPerShare

matx:DilutiveSecuritiesEarningsPerShareEffectOnBasicEarningsPerShare


Dilutive
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302017-12-312017-06-302016-12-312016-03-312015-12-312015-09-302015-03-31
Value0.030.020.020.0200.0100.030.0100.010.010.010.01
Percentage of DilutiveSecuritiesEarningsPerShareEffectOnBasicEarningsPerShare100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0

matx:EquityMethodInvestmentIncreaseNewSubsidiaryOfInvestee us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

matx:EquityMethodInvestmentIncreaseNewSubsidiaryOfInvestee

matx:SsaTerminalsLlc


Equity
Period End2020-12-31
Value0
Percentage of EquityMethodInvestmentIncreaseNewSubsidiaryOfInvestee0.0

matx:FuelSalesRevenue us-gaap:ProductOrService

matx:FuelSalesRevenue

matx:OceanTransportation


Fuel
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.81.41.31.32.12.62.23.3
Percentage of FuelSalesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

matx:IncreaseDecreaseInDeferredDryDockingAmortization

matx:IncreaseDecreaseInDeferredDryDockingAmortization


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value6.06.67.36.05.76.160-8.7-9.1-8.1-9.9-9.2-9.1-9.2-10.5-10.1-14.1-11.5-11.1-10.6-9.1-8.1-6.3-5.7-5.6-5.5-5.1-5.4-5.3-5.3-4.9-5.9-5.8-5.4-6.0-6.2-5.5-5.6
Percentage of IncreaseDecreaseInDeferredDryDockingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:IncreaseDecreaseInDeferredDryDockingPayments

matx:IncreaseDecreaseInDeferredDryDockingPayments


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value7.99.55.73.55.02.68.0113.73.28.75.40.54.69.512171515151513111.77.25.11.60.74.57.33.44.64.81.212101011
Percentage of IncreaseDecreaseInDeferredDryDockingPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:IncreaseDecreaseInOperatingLeaseLiabilities

matx:IncreaseDecreaseInOperatingLeaseLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-24600000.0-22500000.0-22200000.0-17700000.0-19100000.0-16900000.0-8200000.0-18400000.0-16600000.0-16700000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:IncreasedInRestrictedCash

matx:IncreasedInRestrictedCash


Increased
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value350.026702841
Percentage of IncreasedInRestrictedCash100.00.0100.0100.0100.0100.0

matx:IncreasedInRestrictedCash us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:TradeAccountsReceivable


Increased
Period End2021-06-302020-09-302020-06-30
Value310.026
Percentage of IncreasedInRestrictedCash0.00.0100.0

matx:OceanTransportationServicesRevenue us-gaap:ProductOrService

matx:OceanTransportationServicesRevenue

matx:OceanTransportation


Ocean
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value674554537490402391407424
Percentage of OceanTransportationServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

matx:OperatingLeaseRightOfUseAssetsAmortization

matx:OperatingLeaseRightOfUseAssetsAmortization


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2523211718178.4181616
Percentage of OperatingLeaseRightOfUseAssetsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:PercentageOfOceanTransportationAndFuelSalesRevenuesDenominatedInForeignCurrency us-gaap:ProductOrService

matx:PercentageOfOceanTransportationAndFuelSalesRevenuesDenominatedInForeignCurrency

matx:OceanTransportation


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value03.00003.00
Percentage of PercentageOfOceanTransportationAndFuelSalesRevenuesDenominatedInForeignCurrency0.0100.00.00.00.0100.00.0

matx:PercentageOfTransportationBrokerageAndFreightServicesRevenueDenominatedinforeigncurrency us-gaap:ProductOrService

matx:PercentageOfTransportationBrokerageAndFreightServicesRevenueDenominatedinforeigncurrency

matx:Logistics


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-2.05.002.9700.030
Percentage of PercentageOfTransportationBrokerageAndFreightServicesRevenueDenominatedinforeigncurrency100.0100.00.0100.00.0100.00.0

matx:ProceedsFromJointVenture

matx:ProceedsFromJointVenture


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value101017300.07.8105.25.34.20.024
Percentage of ProceedsFromJointVenture100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

matx:SaleAndLeasebackTransactionTerminationPayment us-gaap:TypeOfArrangement

matx:SaleAndLeasebackTransactionTerminationPayment

matx:BareboatCharterAgreement


Sale
Period End2021-07-07
Value95
Percentage of SaleAndLeasebackTransactionTerminationPayment100.0

matx:ShipManagementServicesRevenue us-gaap:ProductOrService

matx:ShipManagementServicesRevenue

matx:OceanTransportation


Ship
Period End2020-09-302019-09-30
Value1.11.5
Percentage of ShipManagementServicesRevenue100.0100.0

matx:SupplyChainManagementAndOtherServicesRevenue us-gaap:ProductOrService

matx:SupplyChainManagementAndOtherServicesRevenue

matx:Logistics


Supply
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value7.16.85.94.43.22.72.9000000000000012.9
Percentage of SupplyChainManagementAndOtherServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

matx:TerminalAndOtherRelatedServicesRevenue us-gaap:ProductOrService

matx:TerminalAndOtherRelatedServicesRevenue

matx:OceanTransportation


Terminal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.92.83.65.14.65.85.08.3
Percentage of TerminalAndOtherRelatedServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

matx:TransportationBrokerageAndFreightForwardingServicesRevenue us-gaap:ProductOrService

matx:TransportationBrokerageAndFreightForwardingServicesRevenue

matx:Logistics


Transportation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value174135140133101102126123
Percentage of TransportationBrokerageAndFreightForwardingServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

matx:VesselManagementAndRelatedServices us-gaap:ProductOrService

matx:VesselManagementAndRelatedServices

matx:OceanTransportation


Vessel
Period End2021-06-302021-03-312020-06-302020-03-31
Value1800000.02100000.01500000.01400000.0
Percentage of VesselManagementAndRelatedServices100.0100.0100.0100.0

matx:WarehouseAndDistributionServicesRevenue us-gaap:ProductOrService

matx:WarehouseAndDistributionServicesRevenue

matx:Logistics


Warehouse
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value109.2109.58.28.2-4.68.5
Percentage of WarehouseAndDistributionServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAdditions


Capitalized
Period End2020-12-31
Value500000.0
Percentage of CapitalizedComputerSoftwareAdditions100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5600000.0-2600000.04000000.0-6800000.0-3200000.0-2700000.0-3900000.0-400000.08400000.0-200000.012400000.0-700000.0-900000.0-6100000.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-032021-06-302021-03-042021-03-312020-09-032020-06-042020-06-302020-03-312019-09-302019-06-302019-03-072019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.230.30.230.230.230.220.230.220.220.220.210.210.210.20.20.20.20.190.190.190.190.180.180.180.180.170.170.160.160.150.150.150.150.3150.3150.3150.3150.3150.3150.3150.3150.3150.315
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-242021-06-032020-10-292015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0.30.230.230.180.170.170.170.160.16
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:Range, us-gaap:CreditFacility, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

srt:Maximum, us-gaap:RevolvingCreditFacility, us-gaap:BaseRate


Debt
Period End2021-03-312020-03-31
Value0.750.025
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0

srt:Maximum, us-gaap:RevolvingCreditFacility, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-03-312020-03-31
Value1.750.035
Percentage of DebtInstrumentBasisSpreadOnVariableRate1233.3140.0

srt:Minimum, us-gaap:RevolvingCreditFacility, us-gaap:BaseRate


Debt
Period End2021-03-312020-03-31
Value00.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.030.0

srt:Minimum, us-gaap:RevolvingCreditFacility, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-03-312020-03-31
Value1.00.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate1133.370.0

us-gaap:DebtInstrumentInterestRateDuringPeriod us-gaap:CreditFacility

us-gaap:DebtInstrumentInterestRateDuringPeriod

us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-312020-12-312016-06-30
Value1.58-0.750.0184
Percentage of DebtInstrumentInterestRateDuringPeriod100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8.76.518228.72.71.7126.13.82.8118.26.4-151.2118.12.9
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-300000.0-300000.0-100000.0-100000.0-100000.0-200000.00500000.0-200000.0-200000.0-400000.0-300000.0-400000.0-400000.0-300000.0-300000.0-300000.0-300000.0-300000.0-300000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1200000.0-1300000.0-1100000.0-500000.0-1400000.0-1500000.0-1200000.0-2200000.0-900000.0-900000.0-1200000.0-1000000.0-1300000.0-1100000.0-1300000.0-1300000.0-1300000.0-1200000.0-1400000.0-1500000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses400.0433.31100.0500.01400.0750.00.0-440.0450.0450.0300.0333.3325.0275.0433.3433.3433.3400.0466.7500.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-900000.0-900000.0-900000.0-1000000.0-900000.0-900000.0-1000000.0-900000.0-1000000.0-900000.0-1000000.0-1000000.0-900000.0-900000.0-1000000.0-2800000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-500000.0-600000.0-500000.0-600000.0-600000.0-600000.0-600000.0-500000.0-600000.0-600000.0-600000.0-500000.0-600000.0-600000.0-600000.0-600000.0-500000.0-600000.0-600000.0-600000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit55.666.755.660.066.766.760.055.660.066.760.050.066.766.760.021.40.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.73.63.63.93.33.22.92.73.23.13.43.33.43.43.43.33.43.43.43.3
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.20.20.20.20.20.20.20.10.30.30.20.30.30.20.3-0.60.70.70.70.6
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1.71.52.02.11.91.92.32.42.32.32.22.12.12.22.42.52.42.42.42.5
Percentage of DefinedBenefitPlanInterestCost850.0750.01000.01050.0950.0950.01150.02400.0766.7766.71100.0700.0700.01100.0800.0-416.7342.9342.9342.9416.7

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.3-0.2-0.5-0.6-0.4-0.4-0.7-1.3-0.3-0.3-0.3-0.2-0.1-0.1-0.3-3.51.41.40.01.2
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.2-0.20.3-0.60.70.81.22.70.50.60.50.40.50.40.61.10.70.60.71.1
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost66.7100.0-60.0100.0-175.0-200.0-171.4-207.7-166.7-200.0-166.7-200.0-500.0-400.0-200.0-31.450.042.90.091.7

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value100000.0200000.0100000.0100000.0200000.0100000.0100000.00200000.0100000.0100000.0200000.0100000.0200000.0100000.0-400000.0400000.0400000.0400000.0300000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1100000.01200000.01300000.01300000.01300000.01200000.01200000.01300000.01100000.01100000.01100000.01100000.01100000.01100000.01000000.01100000.0900000.01000000.0900000.01000000.0
Percentage of DefinedBenefitPlanServiceCost1100.0600.01300.01300.0650.01200.01200.00.0550.01100.01100.0550.01100.0550.01000.0-275.0225.0250.0225.0333.3

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2310199.50.2189.1178.7178.36.90.0136.56.46.4
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-302017-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2310199.50.2189.1178.7178.36.90.0136.56.46.4
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value129.2107.73.74.03.08.40.98.58.09.29.1108.97.56.94.96.63.63.02.63.44.55.23.41.23.12.10.21.0-2.4-0.80.20.10.71.6-1.6-2.5-1.1-0.42.0-1.54.4-0.2-0.7
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

matx:SsaTerminalsLlc


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value129.23.74.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:StatementBusinessSegments

matx:OceanTransportationSegment


Income
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value129.27.73.74.08.40.98.59.2
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value527.71919-3.612-18.011-5.0-5.8-17.0191214-19.2150.68.4-14.58.0-4.0-3.9-25.117-10.04.25.1-4.218-4.411-8.512-7.39.3-0.53.1-4.9
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1700000.0-1900000.03600000.0-7100000.0-1900000.0-1500000.0-1700000.0-6100000.0-2400000.0400000.0-6900000.0-500000.00-200000.0300000.0-1800000.0-3400000.0800000.0-39800000.0-2000000.04100000.0400000.0
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value334.8-2.35.6-25.40.20.80.2-20.7-4.8-1.20.05.2-8.2-10.1-5.40.01.1-21.041-0.9-6.4-2.02.613-0.7-7.7-16.67.8-0.8-12.029-0.3-4.95.13.41.40.5
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value300000.0400000.00400000.0200000.0300000.0100000.0400000.0400000.0300000.00400000.0300000.0300000.00300000.0200000.0400000.00400000.0300000.0400000.00500000.0500000.0500000.0100000.0400000.0200000.0400000.00500000.0300000.0400000.00300000.0500000.0400000.00400000.0500000.0300000.0100000.0200000.0200000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized us-gaap:PropertyPlantAndEquipmentByType

us-gaap:InterestCostsCapitalized

matx:VesselConstructionInProgress


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.91.77.44.13.5-6.621-7.55.24.5143.01.91.44.1
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:Vessels


Interest
Period End2020-09-302020-06-302020-03-312019-06-30
Value0.00.0169.9
Percentage of InterestCostsCapitalized0.00.0223.0-150.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value28272624232019191919
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value27252220202019181616
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1200000.0-1100000.0-1200000.0-1200000.0-1100000.0-1200000.0-1200000.0-1000000.0-1200000.0-1100000.0-1200000.0-1100000.0-1100000.0-1300000.0-1100000.0-2200000.0-300000.0-400000.0-400000.0-300000.0-200000.0-400000.0-300000.0-400000.0-200000.0-400000.0-500000.0-300000.0-200000.0-300000.0-300000.0-300000.0-400000.0-300000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax us-gaap:StatementEquityComponents

matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302016-09-302015-06-30
Value-700000.0-700000.0-800000.0-700000.0-600000.0-500000.0-700000.0-700000.0-700000.0-500000.0-900000.0-1700000.0-300000.0100000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax58.363.666.763.650.050.058.363.663.645.569.277.3100.0-50.0

matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent


Other
Period End2021-06-302020-03-312019-09-302019-06-302018-06-302017-09-302016-06-302015-06-30
Value-100000.0-100000.0-100000.0-100000.0-100000.0-100000.0100000.0-100000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax8.38.310.08.39.14.5-50.050.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-400000.0-400000.0-400000.0-400000.0-500000.0-400000.0-500000.0-400000.0-400000.0-500000.0-400000.0-400000.0-300000.0-400000.0-300000.0-300000.0-400000.0-400000.0-200000.0-400000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax33.336.433.336.441.740.041.736.436.445.530.818.2100.0100.0100.0150.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-1200000.0-1100000.0-1200000.0-1100000.0-1200000.0-1000000.0-1200000.0-1100000.0-1100000.0-1100000.0-1300000.0-2200000.0-300000.0-400000.0-300000.0-200000.0-400000.0-400000.0-200000.0-400000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.2-0.1-12.9-0.50.1-0.6-1.2-0.5-0.5-0.2-3.00.1-0.90.2-2.5-0.51.00.7-2.51.20.81.32.61.61.30.9-31.30.70.5
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.2-0.1-0.50.1-0.6-0.5-0.5-0.20.1-0.90.2-0.51.00.7
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1300000.0-1200000.012500000.0-500000.0-1300000.0-1300000.0300000.0-1200000.0-900000.0-900000.01800000.0-1100000.0-500000.0-1300000.01400000.0-1000000.0-1200000.0-900000.01800000.0-900000.0-1000000.0-1100000.01700000.0-1200000.0-900000.0-1400000.0-400000.0-700000.0-700000.0-700000.0-1200000.0-1200000.0-900000.0-1400000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax us-gaap:StatementEquityComponents

matx:AccumulatedDefinedBenefitPostRetirementPlansAdjustmentAttributableToParent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-300000.0-200000.0-300000.0-100000.0-100000.0400000.0-100000.0-200000.0-300000.0-200000.0-300000.0-200000.0-300000.0-100000.0-200000.0-200000.0-200000.0-100000.0-200000.0-400000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax23.116.760.07.77.7-33.311.122.227.340.023.120.025.011.122.220.018.28.322.228.6

matx:AccumulatedNonQualifiedPlansAdjustmentAttributableToParent


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-06-302018-09-302018-06-302018-03-312017-06-302016-09-302016-03-312015-06-30
Value-100000.0100000.0-100000.0-100000.0-100000.0100000.0-100000.0-100000.0-100000.0100000.0-100000.0200000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax8.3-20.07.77.711.1-9.120.07.78.3-11.19.1-22.2

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-1000000.0-900000.0-300000.0-1100000.0-1100000.0-1600000.0-700000.0-700000.0-900000.0-900000.0-900000.0-800000.0-800000.0-800000.0-800000.0-800000.0-800000.0-1000000.0-900000.0-1000000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax76.975.060.084.684.6133.377.877.881.8180.069.280.066.788.988.980.072.783.3100.071.4

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-1300000.0-1200000.0-500000.0-1300000.0-1300000.0-1200000.0-900000.0-900000.0-1100000.0-500000.0-1300000.0-1000000.0-1200000.0-900000.0-900000.0-1000000.0-1100000.0-1100000.0-900000.0-1400000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.7100.0100.0

us-gaap:OtherComprehensiveIncomeOtherNetOfTax

us-gaap:OtherComprehensiveIncomeOtherNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312011-09-302011-06-302010-09-302010-06-30
Value100000.0-200000.0800000.0200000.0-100000.0-700000.0300000.0-700000.0-200000.0100000.0-300000.0200000.0000200000.0-400000.0600000.00-100000.00100000.00100000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.00.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeOtherNetOfTax us-gaap:StatementEquityComponents

matx:AccumulatedOther


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-312017-03-312016-09-302016-03-31
Value200000.0100000.0-400000.0-200000.0-700000.0-200000.0100000.0-300000.0200000.0200000.0600000.0-100000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax200.050.0400.028.6100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-312017-03-312016-09-302016-03-312015-09-30
Value200000.0100000.0-400000.0-200000.0-700000.0-200000.0100000.0-300000.0200000.0200000.0600000.0-100000.0100000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax200.050.0400.028.6100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value100000.0-1100000.00600000.0-100000.0100000.0-1000000.0-600000.0-1500000.00-600000.01000000.03700000.0-2600000.01300000.02700000.0-1600000.0-1600000.0-300000.03300000.0-5200000.0-1100000.0-400000.0300000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForConstructionInProcess

us-gaap:PaymentsForConstructionInProcess


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value30417.49.1110789.720116551095779126441.35526
Percentage of PaymentsForConstructionInProcess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.03.00.00.0153.1
Percentage of PaymentsOfFinancingCosts0.0100.00.00.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.3140.00.11.04.5-0.20.10.13.10.10.20.14.20.20.00.17.1-0.90.50.26.10.00.00.02.90.10.20.01.7
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.0

us-gaap:PaymentsToAcquireOtherProductiveAssets

us-gaap:PaymentsToAcquireOtherProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value623851197.9262824241317191213116.2142217142230
Percentage of PaymentsToAcquireOtherProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-12-312020-09-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.00.00.20.20.00.30.21.50.00.00.40.60.2-0.40.80.8-1.10.61.94.20.80.10.70.02.30.4-1.00.43.18.9121.10.0
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value13310810013530011123817010510757412015111712818655100-172.01116629731382
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.31.4-0.40.30.9140.30.91.01.21052010.01.00.30.51.20.50.83.11.30.31.32.40.80.40.51.11.91.05.90.4-0.51.06.00.04.06.06.0199.00.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfDebt


Repayments
Period End2021-03-312020-03-312019-03-312015-03-312014-03-312013-03-31
Value14118.22.42.542
Percentage of RepaymentsOfDebt100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value158154151190479133149115125876121421106898966956-32.09657243149
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

matx:TimeBasedAndPerformanceBasedShares


Share
Period End2020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302017-09-302017-06-302016-09-30
Value3000.022000.0300.021000.02700.029400.06900.040200.015500.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

matx:TimeBasedAndPerformanceBasedShares


Share
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302017-09-302017-06-302016-09-30
Value-0.0568.4141.8227.336.4538.3636.5829.0924.0232.0936.95
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value0.82.03.74.42.40.10.10.92.52.4
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-312018-03-312017-03-31
Value100000.0200000.0100000.0100000.0100000.0100000.0200000.0300000.0
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.0100.0100.0100.0

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
Value200000.0200000.0200000.0200000.0200000.0200000.0100000.0100000.0100000.0100000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:AlternativeMinimumTaxReceivable

matx:AlternativeMinimumTaxReceivable


Alternative
Period End2020-12-312019-12-312018-12-312017-12-31
Value2.1112150
Percentage of AlternativeMinimumTaxReceivable100.0100.0100.0100.0

matx:CurrentPortionOfMultiemployerPlansWithdrawalLiability

matx:CurrentPortionOfMultiemployerPlansWithdrawalLiability


Current
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1010104.14.14.1
Percentage of CurrentPortionOfMultiemployerPlansWithdrawalLiability100.0100.0100.0100.0100.0100.0

matx:CurrentPortionOfMultiemployerPlansWithdrawalLiability us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Current
Period End2020-12-31
Value4.1
Percentage of CurrentPortionOfMultiemployerPlansWithdrawalLiability38.7

matx:DebtInstrumentCovenantDebtIncurredThresholdAggregatePrincipalAmountOfPriorityDebt us-gaap:CreditFacility

matx:DebtInstrumentCovenantDebtIncurredThresholdAggregatePrincipalAmountOfPriorityDebt

us-gaap:RevolvingCreditFacility


Debt
Period End2020-12-31
Value331
Percentage of DebtInstrumentCovenantDebtIncurredThresholdAggregatePrincipalAmountOfPriorityDebt100.0

matx:DebtInstrumentCovenantMinimumWorkingCapital dei:LegalEntity, us-gaap:LongtermDebtType

matx:DebtInstrumentCovenantMinimumWorkingCapital

matx:MatNav, matx:TitleXiNotes


Debt
Period End2020-12-31
Value1.0
Percentage of DebtInstrumentCovenantMinimumWorkingCapital100.0

matx:DebtInstrumentCovenantRatioMaintenanceOfNetWorth dei:LegalEntity, us-gaap:LongtermDebtType

matx:DebtInstrumentCovenantRatioMaintenanceOfNetWorth

matx:MatNav, matx:TitleXiNotes


Debt
Period End2020-12-31
Value90.0
Percentage of DebtInstrumentCovenantRatioMaintenanceOfNetWorth100.0

matx:DeferredChargesAndOther

matx:DeferredChargesAndOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.73.33.72017
Percentage of DeferredChargesAndOther100.0100.0100.0100.0100.0

matx:DeferredLoanFee

matx:DeferredLoanFee


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value15151515
Percentage of DeferredLoanFee100.0100.0100.0100.0

matx:DeferredLoanFeeAmortizationExpenseAfterYearFive

matx:DeferredLoanFeeAmortizationExpenseAfterYearFive


Deferred
Period End2020-12-312020-09-30
Value9.410
Percentage of DeferredLoanFeeAmortizationExpenseAfterYearFive100.0100.0

matx:DeferredLoanFeeAmortizationExpenseRemainderOfFiscalYear

matx:DeferredLoanFeeAmortizationExpenseRemainderOfFiscalYear


Deferred
Period End2020-12-312020-09-30
Value1500000.0400000.0
Percentage of DeferredLoanFeeAmortizationExpenseRemainderOfFiscalYear100.0100.0

matx:DeferredLoanFeeAmortizationExpenseYearFive

matx:DeferredLoanFeeAmortizationExpenseYearFive


Deferred
Period End2020-12-312020-09-30
Value1000000.01100000.0
Percentage of DeferredLoanFeeAmortizationExpenseYearFive100.0100.0

matx:DeferredLoanFeeAmortizationExpenseYearThree

matx:DeferredLoanFeeAmortizationExpenseYearThree


Deferred
Period End2020-12-312020-09-30
Value1100000.01200000.0
Percentage of DeferredLoanFeeAmortizationExpenseYearThree100.0100.0

matx:DeferredLoanFeeAmortizationExpenseYearTwo

matx:DeferredLoanFeeAmortizationExpenseYearTwo


Deferred
Period End2020-12-312020-09-30
Value1200000.01500000.0
Percentage of DeferredLoanFeeAmortizationExpenseYearTwo100.0100.0

matx:DeferredTaxAssetsDeferredCompensation

matx:DeferredTaxAssetsDeferredCompensation


Deferred
Period End2020-12-312019-12-312018-12-31
Value8200000.05800000.07000000.0
Percentage of DeferredTaxAssetsDeferredCompensation100.0100.0100.0

matx:DeferredTaxAssetsMultiEmployerWithdrawalLiabilities

matx:DeferredTaxAssetsMultiEmployerWithdrawalLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value151616
Percentage of DeferredTaxAssetsMultiEmployerWithdrawalLiabilities100.0100.0100.0

matx:DeferredTaxAssetsOperatingLeaseLiabilities

matx:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value6363
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0

matx:DeferredTaxAssetsOperatingLeaseRightOfUseAssets

matx:DeferredTaxAssetsOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value6161
Percentage of DeferredTaxAssetsOperatingLeaseRightOfUseAssets100.0100.0

matx:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxWithNoExpiration us-gaap:IncomeTaxAuthority

matx:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxWithNoExpiration

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-312019-12-31
Value4000000.06700000.0
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxWithNoExpiration100.0100.0

matx:DeferredTaxLiabilitiesDeposits

matx:DeferredTaxLiabilitiesDeposits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.7127.05411595106833.33.3
Percentage of DeferredTaxLiabilitiesDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:DeferredTaxLiabilitiesLeaseFinancing

matx:DeferredTaxLiabilitiesLeaseFinancing


Deferred
Period End2020-12-312019-12-312018-12-31
Value222326
Percentage of DeferredTaxLiabilitiesLeaseFinancing100.0100.0100.0

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsLessInterestAmount us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsLessInterestAmount

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value23
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsLessInterestAmount100.0

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value80
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal100.0

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.54.84.45.3
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal5.60.00.00.0

matx:DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value10111113
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal13.30.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value148147144140
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal185.50.00.00.0

matx:DefinedBenefitPlanExpectedFutureBenefitQuarterlyPayments

matx:DefinedBenefitPlanExpectedFutureBenefitQuarterlyPayments


Defined
Period End2020-12-31
Value1000000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitQuarterlyPayments100.0

matx:DefinedBenefitPlanPlanAssetsTotal us-gaap:FairValueByMeasurementBasis, us-gaap:RetirementPlanType

matx:DefinedBenefitPlanPlanAssetsTotal

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value212194162
Percentage of DefinedBenefitPlanPlanAssetsTotal100.0100.0100.0

matx:EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndAccruedLiabilities us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

matx:EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndAccruedLiabilities

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value296359221619171515
Percentage of EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

matx:IncentivesAndOtherBenefitAccrualsCurrent

matx:IncentivesAndOtherBenefitAccrualsCurrent


Incentives
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value251419179.62016
Percentage of IncentivesAndOtherBenefitAccrualsCurrent100.0100.0100.0100.0100.0100.0100.0

matx:InsuranceRelatedReceivablesNoncurrent

matx:InsuranceRelatedReceivablesNoncurrent


Insurance
Period End2020-12-312019-12-312018-12-312017-12-31
Value10101112
Percentage of InsuranceRelatedReceivablesNoncurrent100.0100.0100.0100.0

matx:IntangibleAssetsNetExcludingGoodwillRemainingBalance us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

matx:IntangibleAssetsNetExcludingGoodwillRemainingBalance

us-gaap:CustomerLists, matx:LogisticsServicesSegment


Intangible
Period End2020-12-31
Value10
Percentage of IntangibleAssetsNetExcludingGoodwillRemainingBalance100.0

matx:LineOfCreditFacilityOptionToIncrease us-gaap:CreditFacility

matx:LineOfCreditFacilityOptionToIncrease

us-gaap:RevolvingCreditFacility


Line
Period End2021-03-312020-12-312015-07-302012-12-312012-06-30
Value2502501507575
Percentage of LineOfCreditFacilityOptionToIncrease100.0100.0100.0100.0100.0

matx:LongTermDebtExcludingCurrentMaturitiesGross

matx:LongTermDebtExcludingCurrentMaturitiesGross


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value581624685754823910
Percentage of LongTermDebtExcludingCurrentMaturitiesGross100.0100.0100.0100.0100.0100.0

matx:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour

matx:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour


Long
Period End2021-06-302021-03-31
Value400425
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour100.0100.0

matx:LongtermPortionOfMultiemployerPlansWithdrawalLiability

matx:LongtermPortionOfMultiemployerPlansWithdrawalLiability


Longterm
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5254565860
Percentage of LongtermPortionOfMultiemployerPlansWithdrawalLiability100.0100.0100.0100.0100.0

matx:LongtermPortionOfMultiemployerPlansWithdrawalLiability us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Longterm
Period End2020-12-31
Value52
Percentage of LongtermPortionOfMultiemployerPlansWithdrawalLiability100.0

matx:OperatingLossCarryforwardsNotExpectedToBeRealized

matx:OperatingLossCarryforwardsNotExpectedToBeRealized


Operating
Period End2020-12-312019-12-312018-12-31
Value157157152
Percentage of OperatingLossCarryforwardsNotExpectedToBeRealized100.0100.0100.0

matx:OtherLiabilitiesOtherNoncurrent

matx:OtherLiabilitiesOtherNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.62.6148.59.6
Percentage of OtherLiabilitiesOtherNoncurrent100.0100.0100.0100.0100.0

matx:PrepaidFuel

matx:PrepaidFuel


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value10131614119.311
Percentage of PrepaidFuel100.0100.0100.0100.0100.0100.0100.0

matx:PrepaidOperatingExpenses

matx:PrepaidOperatingExpenses


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-31
Value5400000.05700000.06800000.06300000.0
Percentage of PrepaidOperatingExpenses100.0100.0100.0100.0

matx:VesselAndEquipmentSpareParts

matx:VesselAndEquipmentSpareParts


Vessel
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1112131211
Percentage of VesselAndEquipmentSpareParts100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesAndOtherLiabilities


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value10310996908876868993798180857980828576763945446026
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-0.7-0.4-0.1-0.3-0.4
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1216211518
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax-1742.9-4075.0-21700.0-5200.0-4525.0

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-61.7-51.9-55.8-40.6-41.4
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax8814.312975.055800.013533.310350.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value7700000.06500000.06300000.05900000.05900000.04700000.04300000.04800000.04600000.04200000.06600000.05000000.04100000.04700000.05300000.06100000.08100000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BankOverdrafts

us-gaap:BankOverdrafts


Bank
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1913161821131819191314
Percentage of BankOverdrafts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareGross

us-gaap:CapitalizedComputerSoftwareGross


Capitalized
Period End2020-12-31
Value2400000.0
Percentage of CapitalizedComputerSoftwareGross100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1711141219192123241519121213192415191316192025251532529323022322911419
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1711141219192123241519121213192415191316192025251532529323022322911419
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value171114121919212324151912121319241519131619202529323022322911419
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation

us-gaap:ContractualObligation


Contractual
Period End2020-12-31
Value69
Percentage of ContractualObligation100.0

us-gaap:DebtInstrumentFeeAmount us-gaap:CreditFacility

us-gaap:DebtInstrumentFeeAmount

us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-31
Value2200000.0
Percentage of DebtInstrumentFeeAmount100.0

us-gaap:DebtInstrumentFeeAmount us-gaap:DebtInstrument

matx:AmendmentTo2021PrivatePlacementTermLoan


Debt
Period End2021-03-31
Value800000.0
Percentage of DebtInstrumentFeeAmount36.4

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet


Debt
Period End2020-09-302020-06-302019-12-31
Value2500000.02800000.01300000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet100.0100.0100.0

us-gaap:DeferredCosts

us-gaap:DeferredCosts


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-31
Value5753514952525656576067777380899595908976796857475666
Percentage of DeferredCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2020-12-312020-09-302020-06-30
Value151516
Percentage of DeferredFinanceCostsNet100.0100.0100.0

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
Value517471388364528481381380312320
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredRevenueCurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4200000.06900000.05700000.05000000.02900000.03600000.02400000.0
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1371448792191183846367118107
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.91415215268
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsDomestic100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value7500000.07300000.07400000.07400000.07900000.07800000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value102.01.81.93.51.90.8-0.20.310.06.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4.46.75.94.2313.61.51.4
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21194542787963415452
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value5.35.95.66.89.9151110.09.710.010.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4039383653531011108.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7.47.4119.69.9107.74.63.81.07.0
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312011-12-312010-12-31
Value6.67.74.02117
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0

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
Value372319302254339300252278292293287
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value260237215229222
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.80.60.40.60.8
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax100.0100.0100.0100.0100.0

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.42.80.14.64.4
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax550.0466.725.0766.7550.0

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6456614649
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax8025.09366.715450.07816.76137.5

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.10.20.30.30.4
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax100.0100.0100.0100.0100.0

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1619212022
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax16600.09550.07266.76733.35625.0

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.54.36.06.37.7
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax2500.02150.02000.02100.01925.0

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1000000.01000000.0800000.0500000.01000000.0
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate us-gaap:Range, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate

srt:Maximum, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value3.253.75
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate100.0100.0

srt:Minimum, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value0.751.75
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate23.146.7

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value261238215229223
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value292622272560
Percentage of DefinedBenefitPlanBenefitObligation11.110.910.312.011.30.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value263239217232225220
Percentage of DefinedBenefitPlanBenefitObligation100.7100.7100.7101.0101.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value59
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.60.50.12.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter1.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value5.55.75.87.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter9.20.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value76767573
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter127.60.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value4.1
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.72.21.81.8
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths41.50.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.01.01.21.2
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths24.40.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value14131312
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths341.50.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value4.1
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.11.21.21.2
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive26.80.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value14141414
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive363.40.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value4.1
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.11.21.21.2
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour26.80.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value14141413
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour358.50.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value4.1
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312017-12-31
Value2.20.5
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree53.70.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.01.11.21.2
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree24.40.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value14141313
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree356.10.00.00.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Defined
Period End2020-12-31
Value4.1
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.01.01.11.2
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo24.40.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value14131313
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo351.20.00.00.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-29.1-26.0-22.2-27.7-25.2
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-50.3-45.1-55.2-45.4-46.6
Percentage of DefinedBenefitPlanFundedStatusOfPlan172.9173.5248.6163.9184.9

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

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

matx:DomesticEquitySecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value53.00.530.530.53
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0100.0100.0

matx:InternationalEquitySecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value15.00.150.150.15
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage28.328.328.328.3

matx:OtherAssetsAndCash, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value5.00.050.050.05
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage9.49.49.49.4

us-gaap:DebtSecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value22.00.220.220.22
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage41.541.541.541.5

us-gaap:RealEstate, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value5.00.050.050.05
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage9.49.49.49.4

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value100.01.01.01.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage188.7188.7188.7188.7

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.40.0440.0440.0440.0440.044
Percentage of DefinedBenefitPlanUltimateHealthCareCostTrendRate1100.0100.0100.0100.0100.0100.0

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

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

matx:DomesticEquitySecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value60.00.590.570.590.62
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0100.0

matx:InternationalEquitySecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value17.00.170.160.170.13
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations28.328.828.128.821.0

matx:OtherAssetsAndCash, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.00.010.010.010.02
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1.71.71.81.73.2

us-gaap:DebtSecurities, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value17.00.170.190.170.17
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations28.328.833.328.827.4

us-gaap:RealEstate, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.00.060.070.060.06
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations8.310.212.310.29.7

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations166.7169.5175.4169.5161.3

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DividendsPayableCurrentAndNoncurrent


Dividends
Period End2021-06-302020-06-302019-06-302018-06-302017-06-302016-06-302015-06-302014-06-302013-06-302012-06-30
Value1310.09.49.08.78.27.97.46.96.4
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-31
Value29282524232322202322211517151716161516151615151920191919202018
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

matx:NonVestedRestrictedStockUnitsAndPerformanceBasedEquityAwards


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value17111111118.9
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0

matx:TimeBasedAndPerformanceBasedShares


Employee
Period End2021-06-302021-03-312020-09-30
Value303517
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:EquityMethodInvestmentOwnershipPercentage

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Equity
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312016-06-302016-03-312015-12-312015-09-302015-06-30
Value35.035.035.035.00.350.350.350.350.350.350.35
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:EquityMethodInvestments

matx:SsaTerminalsLlc, matx:OceanTransportationSegment


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4876879382666457595652
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312012-12-312011-12-312010-12-31
Value6655443221181614121411109.62317
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerLists


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312013-12-312012-12-312011-12-31
Value716866636057555249464441383532302724217.96.86.25.6
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.066.964.864.624.3

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments

us-gaap:CustomerLists, matx:LogisticsServicesSegment


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2823191510
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization42.643.444.545.748.6

us-gaap:CustomerLists, matx:OceanTransportationSegment


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value37312417
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization57.456.655.554.3

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value28231915108.17.6
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization42.643.444.545.748.665.964.4

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value111
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


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

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:CustomerLists


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312014-12-312013-12-312012-12-312011-12-31
Value23023023023023023023023023023023023023023023010101111
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReceivable

us-gaap:IncomeTaxReceivable


Income
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.312262.623150.014
Percentage of IncomeTaxReceivable100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value25825825825825815110
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill us-gaap:StatementBusinessSegments

matx:LogisticsServicesSegment


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value117117117117117109.8
Percentage of IntangibleAssetsGrossExcludingGoodwill45.545.545.545.545.57.194.2

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value3400000.04900000.05100000.05400000.05800000.03900000.03300000.0
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value80
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2020-12-312016-12-312015-12-31
Value8.11111
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

matx:StandbyAndCommercialLettersOfCredit


Line
Period End2020-12-312020-03-312019-12-312018-12-312017-12-312017-06-302012-12-312012-06-30
Value1001001001001001001000.0001
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevolvingCreditFacility


Line
Period End2021-03-312020-12-312020-03-312019-12-312018-12-312017-12-312017-06-302015-07-302015-06-302012-12-312012-06-30
Value650650650650650650650400375375375
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity0.0650.0650.0650.0650.0650.0650.00.00.0375.0375000000.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility


Line
Period End2021-03-312020-12-312020-09-302020-03-312014-12-312013-12-31
Value6165705181636.05.8
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2020-12-312019-12-312015-12-312014-12-312013-12-31
Value686585443395292
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value688579621652683429373286
Percentage of LongTermDebtFairValue100.298.90.00.00.096.994.497.7

us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value686585584651685443395
Percentage of LongTermDebtFairValue100.0100.00.00.00.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-312020-09-302011-12-31
Value400452157
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2021-06-302021-03-312020-12-312020-09-302011-12-31
Value6565591252
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-312020-09-302011-12-31
Value5151206
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2021-06-302021-03-312020-12-312020-09-302011-12-31
Value5151516045
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2021-06-302021-03-312020-12-312020-09-302011-12-31
Value51516018854
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2021-06-302021-03-312020-12-312020-09-302011-12-31
Value60601365945
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear


Long
Period End2021-06-302021-03-31
Value3244
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear100.0100.0

us-gaap:LongtermDebtPercentageBearingFixedInterestAmount us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:LongtermDebtPercentageBearingFixedInterestAmount

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Longterm
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value648648686697708558585602608594584600616633651664659674685653443447443379378397395393398395292316
Percentage of LongtermDebtPercentageBearingFixedInterestAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtPercentageBearingFixedInterestAmount us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Longterm
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value661673688700712567579593609613621635637649652664668681683617418427429363364371373377379383286295
Percentage of LongtermDebtPercentageBearingFixedInterestAmount101.9103.9100.2100.4100.4101.698.998.4100.3103.2106.3105.8103.4102.5100.1100.0101.4100.999.894.594.495.496.995.796.293.494.495.995.397.097.793.2

us-gaap:EstimateOfFairValueFairValueDisclosure


Longterm
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value648648686697708558585602608594584600616633651664659674685653443447443393398395292316
Percentage of LongtermDebtPercentageBearingFixedInterestAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtPercentageBearingVariableInterestAmount us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:LongtermDebtPercentageBearingVariableInterestAmount

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Longterm
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-12-31
Value2571123178357379290235255235273295254205175859955195445424
Percentage of LongtermDebtPercentageBearingVariableInterestAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtPercentageBearingVariableInterestAmount us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Longterm
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302012-12-31
Value2571123178357379290235255235273295254205175859955195445411815224
Percentage of LongtermDebtPercentageBearingVariableInterestAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Longterm
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-12-31
Value2571123178357379290235255235273295254205175859955195445424
Percentage of LongtermDebtPercentageBearingVariableInterestAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualCarryingValueCurrent us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:SuretyBond


Loss
Period End2020-12-312014-12-312013-12-31
Value331919
Percentage of LossContingencyAccrualCarryingValueCurrent100.0100.0100.0

us-gaap:MultiemployerPlanPensionInsignificantAccumulatedBenefitObligation

us-gaap:MultiemployerPlanPensionInsignificantAccumulatedBenefitObligation


Multiemployer
Period End2020-12-31
Value260
Percentage of MultiemployerPlanPensionInsignificantAccumulatedBenefitObligation100.0

us-gaap:MultiemployerPlansWithdrawalObligation us-gaap:BusinessAcquisition, us-gaap:RetirementPlanName

us-gaap:MultiemployerPlansWithdrawalObligation

matx:HorizonLinesInc, matx:Local153Fund


Multiemployer
Period End2020-12-312019-12-31
Value6.56.7
Percentage of MultiemployerPlansWithdrawalObligation100.0100.0

matx:HorizonLinesInc, matx:MultiEmployerIlaPrssaPensionFund


Multiemployer
Period End2020-12-31
Value56
Percentage of MultiemployerPlansWithdrawalObligation875.4

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312020-03-312019-12-31
Value3.70.0410.042
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value7.671741831901940.0
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.00.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value11141823172014
Percentage of OperatingLossCarryforwards156.619.724.712.99.310.40.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1851841891921921920.0
Percentage of OperatingLossCarryforwards2446.1259.1254.0104.6101.599.10.0

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent


Other
Period End2020-12-312019-12-31
Value3800000.01200000.0
Percentage of OtherAssetsMiscellaneousNoncurrent100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2700000.03100000.03000000.03000000.02100000.02500000.02500000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1700000.02100000.01800000.01800000.01000000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities63.067.760.060.047.6

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1000000.01000000.01200000.01200000.01100000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities37.032.340.040.052.4

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:NonqualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.34.44.24.54.3
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:QualifiedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2926222725
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent676.7590.9528.6615.6586.0

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5045554546
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent1169.81025.01314.31008.91083.7

us-gaap:PrepaidInsurance

us-gaap:PrepaidInsurance


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value7.5131215174.92.9
Percentage of PrepaidInsurance100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2020-12-312019-12-312018-12-312017-12-31
Value5300000.07200000.04900000.00
Percentage of RestrictedCash100.0100.0100.00.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-03-312016-12-312016-09-30
Value5.35.35.33.03.05.87.28.78.78.94.93131110
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5.35.35.33.03.05.87.28.78.78.94.9
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value5.35.35.33.03.05.87.28.78.78.94.90.931
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value5.35.35.33.03.05.87.28.78.78.94.90.931
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:SelfInsuranceReserveCurrent

us-gaap:SelfInsuranceReserveCurrent


Self
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7.0129.91518202124273126252419201515131313117.37.18.08.08.08.010.0
Percentage of SelfInsuranceReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SelfInsuranceReserveNoncurrent

us-gaap:SelfInsuranceReserveNoncurrent


Self
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2526272927
Percentage of SelfInsuranceReserveNoncurrent100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value792000.0778000.0759000.0686000.0720000.0678000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:RestrictedStockUnitsRSU, matx:Plan2007


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value3000.08000.0164000.0377000.0701000.0678000.0678000.0555000.0556000.0571000.0563000.0356000.0352000.0394000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber0.41.021.655.097.4100.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU, matx:Plan2016


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value789000.0770000.0595000.0309000.019000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber99.699.078.445.02.6

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value35.1433.3933.9236.4133.3529.21
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

matx:Plan2016


Share
Period End2020-12-31
Value2500000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:EmployeeStockOption, matx:Plan2007


Share
Period End2020-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1000.0235000.0319000.0403000.0620000.0662000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value20.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value35000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-31
Value35000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:ShortTermBorrowings

us-gaap:ShortTermBorrowings


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6559595350534842
Percentage of ShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value100000.0100000.0400000.0500000.0400000.0400000.0200000.0300000.0400000.0200000.0200000.0
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value186.77.28.37.08.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
Operating Margin
us-gaap:StatementBusinessSegments
(None,)
Operating  Marginus-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments
(None,)
Operating Income Lossus-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents
(None,)
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Taxus-gaap: Statement Equity Components
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Accumulated Depreciation Depletion And Amortization Property Plant And Equipmentus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Netus-gaap: Property Plant And Equipment By Type
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:StatementBusinessSegments
('us-gaap:CustomerLists', None)
Intangible Assets Net Excluding Goodwillus-gaap: Finite Lived Intangible Assets By Major Class, us-gaap: Statement Business Segments
us-gaap:LongTermDebt
us-gaap:LongtermDebtType
(None,)
Long Term Debtus-gaap: Longterm Debt Type
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
('us-gaap:QualifiedPlan', None)
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrentus-gaap: Retirement Plan Tax Status, us-gaap: Retirement Plan Type
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
(None, 'us-gaap:PensionPlansDefinedBenefit')
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrentus-gaap: Retirement Plan Tax Status, us-gaap: Retirement Plan Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents
(None,)
Stock Issued During Period Value New Issuesus-gaap: Statement Equity Components
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:LongtermDebtType
(None,)
Debt Instrument Interest Rate Stated Percentageus-gaap: Longterm Debt Type