MCK


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:ConversionOfStockByUniqueDescription
us-gaap:CommonStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

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

us-gaap:Revenues

us-gaap:CostOfRevenue

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:Ownership
us-gaap:StatementEquityComponents

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

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:InventoryLIFOReserve

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:Land

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:LongTermDebt
us-gaap:BalanceSheetLocation
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:MinorityInterest
us-gaap:StatementEquityComponents

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:StatementBusinessSegments
mck:AssetImpairmentChargeNetofTax

mck:CorporateOperatingExpenseandOtherIncomeNet
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
mck:DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDuetoSettlementNetofTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
mck:EquityMethodInvestmentOtherthanTemporaryImpairmentNetofTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
mck:EquityMethodInvestmentRealizedGainLossonDisposalNetofTax

mck:ExchangeOfferSharesDistributed
us-gaap:ConversionOfStockByUniqueDescription

mck:InventoryLIFOReservePeriodChargeNetofTax

mck:NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
mck:NoncontrollingInterestIncreaseDecreaseDuetoOther
us-gaap:StatementEquityComponents
mck:ReclassificationofTemporaryEquitytoLiability
us-gaap:Ownership, us-gaap:SubsequentEventType
mck:RepurchaseofRedeemableNoncontrollingInterestSharesRepurchased
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
mck:RestructuringChargesNetofTax

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AssetImpairmentCharges
us-gaap:StatementBusinessSegments

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee
us-gaap:LitigationCase
us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillOtherIncreaseDecrease
us-gaap:StatementBusinessSegments

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccruedTaxesPayable

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InventoryLIFOReservePeriodCharge

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents
us-gaap:Ownership
us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:Ownership, us-gaap:SubsequentEventType
us-gaap:PaymentsForRepurchaseOfRedeemableNoncontrollingInterest

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireSoftware

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromShortTermDebt

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction

us-gaap:RepaymentsOfShortTermDebt
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:RestructuringCharges
us-gaap:RestructuringPlan
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedDuringPeriodShares

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesRetired

mck:AccountsReceivableCustomerAccountsGross
us-gaap:ConversionOfStockByUniqueDescription
mck:CommonStockConversionBasisNumberofSharesIssuedForEachShareConverted
us-gaap:LitigationCase, us-gaap:LitigationStatus, us-gaap:SubsequentEventType, dei:LegalEntity
mck:LossContingencySettlementAgreementTermsNumberofCompaniestoAdoptAntiDiversionProgramsChanges
us-gaap:Ownership
mck:NoncontrollingInterestsPutRightExercisePrice

mck:OtherCapital
us-gaap:RetirementPlanName, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
mck:PensionAndOtherPostretirementDefinedBenefitPlansPlanAssetValue
us-gaap:Ownership
mck:RedeemableNoncontrollingInterestsMaximumRedemptionValue

mck:SECSchedule1209ValuationAllowancesandReservesCurrentAmount
us-gaap:LossContingenciesByNatureOfContingency
mck:SiteContingencyNumberofSites

us-gaap:AccountsReceivableGrossCurrent
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:AccrualForEnvironmentalLossContingenciesGross

us-gaap:AccruedLiabilitiesCurrent
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:AdditionalPaidInCapital

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:DisposalGroupClassification
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationLiability

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization

us-gaap:CapitalizedComputerSoftwareNet
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DebtInstrumentFairValue

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeLiabilityNotionalAmount
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestments

us-gaap:FinanceLeaseLiability

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:StatementBusinessSegments
us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:DisposalGroupClassification
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:LitigationCase
us-gaap:LossContingencyPendingClaimsNumber
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:Ownership, us-gaap:SubsequentEventType

us-gaap:NotesAndLoansPayable

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:OtherReceivablesGrossCurrent
us-gaap:DisposalGroupClassification, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:PercentageOfLIFOInventory

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:RedeemableNoncontrollingInterestEquityCommonCarryingAmount
us-gaap:StatementEquityComponents

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:RestructuringPlan
us-gaap:RestructuringAndRelatedCostCostIncurredToDate1
us-gaap:Range, us-gaap:RestructuringPlan
us-gaap:RestructuringAndRelatedCostExpectedCost1
us-gaap:BalanceSheetLocation, us-gaap:RestructuringPlan
us-gaap:RestructuringReserve
us-gaap:ConsolidationItems, us-gaap:RestructuringPlan
us-gaap:ConsolidationItems, us-gaap:RestructuringPlan, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:RestructuringPlan
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
us-gaap:ShareRepurchaseProgram
us-gaap:StockRepurchaseProgramAuthorizedAmount1

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockShares
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ValuationAllowancesAndReservesType

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:CommonStockValue ▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄████████████████████23333333333333333344444444444444444444NANA4NANANA
 us-gaap:CommonStockParOrStatedValuePerShare us-gaap:ConversionOfStockByUniqueDescription mck:SeparationofChangeHealthcareJVNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▃▃▃▁▁▁███272272272271271271275275275NANANA273NANANA271NANANA384NANANA381NANANA376NANANA373NANANA369NANANA359NANANA
us-gaap:CommonStockSharesIssued ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██████████▇█▇▇▇▇▇▇▇▇272272272271271271275275275274274274273273272272271271385385384383383383381380380379376377376375373372371371369365NANA359NANANA
us-gaap:EarningsPerShareBasic ▅▃▁▃▁▃▄▃▁▄▃▃█▄▃▃▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃5.891.04-3.992.25-4.172.412.52-0.68-5.584.350.011.4616.922.871.362.411.92.762.662.490.572.032.021.751.610.281.761.861.121.271.71.612.141.221.21.151.650.611.271.121.291.211.131.07
us-gaap:EarningsPerShareDiluted ▅▃▁▃▁▄▄▃▁▄▃▃█▄▃▃▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃5.851.03-3.992.24-4.172.42.51-0.68-5.584.330.011.4516.762.851.342.381.882.732.632.450.562.01.991.721.580.281.741.831.11.241.671.582.091.21.181.131.620.61.251.11.261.191.111.06
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▅▃▁▃▁▃▄▃▁▄▃▃█▄▃▄▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃5.861.06-3.992.28-4.172.422.52-0.69-5.584.340.011.4616.952.891.362.911.992.742.682.531.722.042.081.811.590.681.821.841.131.31.691.61NA1.221.2NA1.650.610.991.121.291.21NANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▅▃▁▃▁▄▄▃▁▄▃▃█▄▃▄▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃5.821.06-3.992.27-4.172.412.51-0.69-5.584.320.011.4416.792.861.352.881.972.712.652.51.692.012.051.781.560.671.791.811.111.271.661.58NA1.21.18NA1.620.60.971.11.26000000000000021.19NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ███▇▇▇▇▇▆▇▆▆▆▆▆▆▅▆▆▅▅▅▅▅▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254700544758440583814134306329543220830620311872985030798316993083930216299802885328247275342745026643282722713026657
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems us-gaap:OperatingSegments██▇▆▅▇▅▅▄▅▅▄▃▄▄▄▂▃▃▃▁▂▁5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254648444160NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mck:EuropeanPharmaceuticalSolutions█▆▃▄▄▆▃▆█▆▄▁715169316598671067576911663969357176698967736382NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mck:U.S.PharmaceuticalandSpecialtySolutions▇█▇▅▂▅▃▂▁▃▂▂462744692345979441654089744279416104097739733419694060340282NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical country:US██▇▅▂▆▃▂▁▃▂▂487854931048292463214311046523437744289041426438494255842093NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical us-gaap:NonUs▅▆▃▄▃▅▃▅█▆▄▁9750986293249407931996859301971710202976895038958NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ███▇▇▇▇▇▆▇▆▆▆▆▆▆▅▆▆▅▅▅▅▅▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254700544758440583814134306329543220830620311872985030798316993083930216299802885328247275342745026643282722713026657
us-gaap:CostOfRevenue ███▇▆▇▆▆▆▇▆▆▅▆▆▅▅▅▅▅▄▅▄▄▂▂▁▁55199561395474952941492285323850271498284855350902492274849145917473184720146826438264502745917446984047544063418354126135601324663094530288NA295192813029198NA292732856928471271022678626168260582506026817NANA
us-gaap:CostOfGoodsAndServicesSold ███▇▆▇▆▆▆▇▆▆▅▆▆▅▅▅▅▅▄▅▄▄▂▂▁▁55199561395474952941492285323850271498284855350902492274849145917473184720146826438264502745917446984047544063418354126135601324663094530288NA295192813029198NA292732856928471271022678626168260582506026817NANA
us-gaap:GrossProfit █▇▆▆█▇▆▆▇▆▆▅▆▆▆▇▆▆▆▆▇▇▇▆▅▃▃▃▃▂▂▂▃▂▂▂▃▂▁▁▂▂▁▁33363033286727873201297028042779307527152834256027962812275629072852287228442848291729422923279725401840200919201996166817201600184515661647150917511461136613921583145513351303
us-gaap:OperatingExpenses ▆▆▅▅▇▅▅▆█▅▅▅▁▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄246726732241215337702287211526964502198420091927-1640198118861935211219521890191720372162213521091984135513301273NA118311091021NA10741169103711281154949NA1010946NANA
us-gaap:OperatingIncomeLoss ▃▃▃▃▁▃▃▂▁▃▂▃█▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃869360626634-56968368983-9448342396334726831580972740920954931712780788688556485679647NA485611579NA492478472623307417474573509NANA
us-gaap:OtherNonoperatingIncomeExpense █▆▁6926-78NA-1008420NA-952069NA-342323NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▆▆▆▆▅▆▅▅▆██▇▄▅▄▇▄▄█▁▄▂▆▆▆▆▆-12143-324426-11326-129-9130303382138-398-109-255255-246-243347-860-416-6779869-55100-61NA-1671-41NA20-12811NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperations ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▄▃▄▄▄▃▃▃▃▃▃▃▃1015191-729429-796470498-139-114890213073595636308655452629623586401474483417367156416420NA306399379NA300296NA422155255NA348326NANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▃▁▃▂▃▃▂▁▃▃▃█▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃1201294-970619-6336505876-10946971784584674780525912669846880855641696713607465408629594NA436566531NA426420416NA261376440NANANANA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▄▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃1072247-676483-744527552-81-1087960563633630649325673465642636599411513491425362156416420263306399379NANANANA422155327298348326301288
us-gaap:IncomeTaxExpenseBenefit ▃▃▁▃▃▃▃▃▃▁▃▃█▃▄▄▄▄▄▄▄▃▄▃▃▄▄▃12947-2941361111233587-7-263122951044131200239204204244256228183222182103252213174NA138165151NA126124130136106121142184161NANA
us-gaap:ProfitLoss ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃1078242-677477-744526553-80-108596156365362364632456044464763058914451147741136664404424259298401380NANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▄▃▂▃▁▃▃▂▁▄▃▃█▃▃▃▄▃▃▄▂▃▃▃▃▃▃▃981227-656494-819405538-222-11378872275143675259192364715433407855-77793-6351343612506371NA287477345NA323172302NANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▅▆▅▅▅▅▅▅▆▆▆█▅▄▄▃▅▄▄▅▃▄▁▄▄▄▄▄626635604146472185708817251-1718-4840-18-757-64-13-131-416000NANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▄▃▂▃▁▃▃▂▁▄▃▄█▃▃▃▄▃▃▄▁▃▂▃▃▃▃▃1043293-621554-778451585-201-10529573156863726242210316755415400912-84180-19450945113506371NANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▃▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃1021186-730423-796469499-138-11469031309358863330754243163461757613247246940337164404424259298401380521300296286422155327298NANANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest █▇▇▇▇█▇███▇▇▅▃▃▃▃▃▃▃▃▆▂▂▁▂▂▂▂▂▂▂5756535452575458615855563513171813131313123988-50000000NANANANANANANANANANANANA
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:Ownership mck:VantageandClarusOneSourcingServicesLLC▆▄▂▃▁▅▃▅█▅▃▆484542434146434650464447NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest█▇▇▇▇▇▇▇█▇▇█▄▁▁▂48454243414643465046444724357NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:Assets ▇▇▇▇▇▇▇▇▇███▇▇▇▇▆▆▆▆▆▆▆▆▅▂▂▂▂▂▂▁▂▂▁▁▁▁6124760873589946168059672610116142161282603816421363846618166096957874583155790456563550875581955925538705511052232530065175936479359473549134786334333296831748330933315731907310173088630396NANA28189NANANA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mck:EuropeanPharmaceuticalSolutions9499NANANA7829NANANA10467NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mck:U.S.PharmaceuticalandSpecialtySolutions34927NANANA32310NANANA31431NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:AllOtherSegments7944NANANA11006NANANA11509NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Liabilities us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary82NANANA64NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇▇▇▇▇▇▇███▇▇▇▇▆▆▆▆▆▆▆▆▅▂▂▂▂▂▂▁▂▂▁▁▁▁6124760873589946168059672610116142161282603816421363846618166096957874583155790456563550875581955925538705511052232530065175936479359473549134786334333296831748330933315731907310173088630396NANA28189NANANA
us-gaap:StockholdersEquity ▁▂▂▄▄▅▅▆▆█▇█▇▄▆▅▅▅▅▅▄▅▅▅▅50926174648278748094918593269407980411734111431130311095769294499249892488768788885380019084893189798522NANANA7070NANANA68317456711669177220NANANA7532NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:AssetsCurrent █▇▆▇▇▇▇▇▆▇▇▆▆▇█▇▇▇▇▇▆▆▅▅▅▂▂▂▂▂▁▁▂▂▂▁▁▁4222239390373533842838465383193854438214371364019539794376973694839268413383903838437382613874938571366703714133879339733257325234245452406723170234392309122054236032456923262223742235721693NANA21504NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▂▁▂▄▂▂▂▃▃▃▃▃▃█▆▅▄███▆▅▅▆▃▄▄▃▃▃▂▄▆▅▄▅▄▄▄▅▄401520651356194729811849211821992672261925632339278324345464465940483406535956355341458738044105419324312960290524562726283120133149419139433116361232133050326537313428NANA
us-gaap:ReceivablesNetCurrent █▇▇█▇▇█▇▇██▇▇▇▇▇▇▆▆▆▅▆▅▅▄▂▂▂▂▂▂▂▂▂▂▁▁▁199501883118984192871824618932192131909317711200151962719132182151819818308183341798017402167981668415914165811539114920141931075010321100139975996298239564997796739525937291878647NANA8075NANANA
us-gaap:InventoryNet ██▇████▇▇██▇▆▇▆▇▆▇▇▆▆▆▅▅▅▃▂▂▂▂▂▂▂▂▁▁▁▁167341702016356166041670916951166711636416310171031688515498152781612115273155001533516411155871493214296153781406314124133081146210484103321033510390100701005910073103769426953092259547NANA9441NANANA
us-gaap:InventoryLIFOReserve 444NANANA696NANANA906NANANA1005NANANA1012NANANA768NANANA431NANANA120NANANA107NANANA96NANANA93NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▃▃▃▃▂▃▃▃▂▂▄▄▃▂▂▃▆▆▆█▇▃▃▄▅▃▄▄▂▁▁▂▂▁▁▁▁61761865759052958754255844345871972867251352654510741042100513201119595621824879591780817404361367418404329368356333NANANANANANANA
us-gaap:Land 151NANANA172NANANA187NANANA166NANANA228NANANA207NANANA221NANANA129NANANANANANANA70NANANA50NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:PropertyPlantAndEquipmentGross 4194NANANA4326NANANA3933NANANA3803NANANA3784NANANA3444NANANA3401NANANA2529NANANA2175NANANA2043NANANA1858NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 1829NANANA1778NANANA1469NANANA1511NANANA1506NANANA1399NANANA1179NANANA1208NANANA1132NANANA1052NANANA1007NANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇███████▇▇▇▇▇▇▇▇▆▆▆▆▆▆▇▇▃▃▃▃▂▂▂▁▁▁▁▁▁23652408249324662548250324882483246424012348234922922411230024302278211221082100204521562174220922221359134813331321124712231221104310151006988991934NANA851NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical country:US1642NANANA1698NANANA1529NANANA1383NANANA1500NANANA1273NANANA1246NANANA1205NANANA952NANANA901NANANA764NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical us-gaap:NonUs723NANANA850NANANA935NANANA909NANANA778NANANA772NANANANANANANANANANANANANANANANANANANANANANANA
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 us-gaap:Goodwill us-gaap:StatementBusinessSegments mck:U.S.PharmaceuticalandSpecialtySolutions▂▄▁▅▄▃▄▄█406740784060408840784074408340784110NANANA3391NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Goodwill us-gaap:StatementBusinessSegments us-gaap:AllOtherSegments▁▆▄▆▄▃█▆█277728622833285528292806288928642894NANANA2337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▄▅▅▅▅▆▆▆▆▆▆▆▅▅▄▄▄▄▄▅▅▆▆▇█▂▂▂▂▁▁3156336434893600368939204128425841024094420642383665358330613143302131033254342634413864409943905022206621502196227017991699NA1750NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▄▅▅▆▆▇██▆▆▇▆▃▃▁▂▁17001810187419602017212422392314206920222094201915981518125313861328NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:ServiceAgreements▁▂▂▂▂▂▃▃▃▄▄▄▄▄▄▄▄▄▄▅▅▅▆▆▆▇▇▇███514544558575587597621628651677690691693682668676690692705734742773807825822842864879904924923NA970NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksAndTradeNames▆▆▆▇▇▇▇██████▇▄▃▂▂▂▂▂▂▃▃▃▁▁▁▁566598601649655651702731745743754734721659376292218210225238233270287309312148154155162NANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▄▃▃▃▃▃▃▃▃▃▃▃█▃▂▃▇▂▂▂▂▃▃▃▃▁▁▁▁▁▂▂▂▂▂▁▁▂22582099208220972099218420252070202719911971192734152000192321663041191018971879189719931985200320151520158116331620163818271770166517351769164915661699NANA1481NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:LiabilitiesCurrent █▇▆▇▇▆▇▇▆▇▇▆▆▇▆▆▆▆▆▆▅▅▄▄▄▂▂▂▂▁▂▁▂▂▁▁▁▁4262440055371453795237626374243886338348366853765237765357993561238174370513657435071344793477534673334973277829337292452950121904213792148121357202082075020097216862071519845191421872619685NANA17012NANANA
us-gaap:AccountsPayableCurrent █▇▇▇▇▆▇▆▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▄▃▂▂▂▂▁▂▁▂▂▁▁▁▁3719532744325603402133853320913322732063321773300933580320153102230811310373042428585268542715126319251662520522656228122142916638164351665416108150471550115151161141567714895145471409013581NANA13255NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:LongTermDebt ▁▂▂▂▁▄▂▂▂▃▂▂▃▂▃▃▃▄▅▆▆▇▇██73877700764476927595873676947719788080458000794983627700810781108147871192009700970910000100001020010373NANANA4873NANANA3580NANANA4004NANANA2296NANANA
 us-gaap:LongTermDebt us-gaap:BalanceSheetLocation mck:LongtermDebtCurrentMaturities▄▄▁▁▁▄▄▄▄▂▂▂▄▆██▆▄11001000302310330112011261127112953152552510571748216621681612996NANA1529NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship,us-gaap:LongtermDebtType mck:EuroDenominatedNotes,us-gaap:NetInvestmentHedging,us-gaap:LoansPayable▄▄17001700NANA1950NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation,us-gaap:RetirementPlanType country:US,us-gaap:PensionPlansDefinedBenefit9NANANA9NANANA121NANANA203NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation,us-gaap:RetirementPlanType us-gaap:ForeignPlan,us-gaap:PensionPlansDefinedBenefit189NANANA355NANANA360NANANA317NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▂▂▂▁▁▂▂▂▂▂▂▂▁▁▁▂▁▁▁▁▁▁▇██217211210194193204208240253238219210178160174242848485868472159517861796NANANA0NANANANANANANANANANANANANANANA
 us-gaap:MinorityInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▇▆▆▆▆▆▆▇█▇▇▆▅▄▅█▁21721121019419320420824025323821921017816017424284NANANA84NANANA1796NANANA0NANANA0NANANA0NANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▂▃▄▄▄▅▅▆▆▇▄▄▃▃▃▃▃▆▆▇▇▇▇▇█▄▄▄▃▂▁▁▂▁▁▁▁▁16621836195020162103219521972448262528072082193817741684172717681809255526252741272227342749285529912027205820801838160314301376150414081368138313531326NANA1352NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:StockholdersEquity ▁▂▂▄▄▅▅▆▆█▇█▇▄▆▅▅▅▅▅▄▅▅▅▅50926174648278748094918593269407980411734111431130311095769294499249892488768788885380019084893189798522NANANA7070NANANA68317456711669177220NANANA7532NANANA
us-gaap:CommonStockValue ▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄████████████████████23333333333333333344444444444444444444NANA4NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▇▆▆▆▆▇▇▇▇█▇▇▇▃▂▂▂▁█▇▆▆▆▅▅▅▅▄▄▄▃▃▃▂▂▂▁▁1302212075119651277012409132761335412932129861420213370134421318996639088884383607995137801322712705126281221111800114531113811130107801040210384101359783945189818731848682507876NANA7236NANANA
us-gaap:TreasuryStockValue █▇▆▆▅▅▅▅▄▄▄▃▃▃▂▂▁▁▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▄▄▄▃▃1289210853103539603890285878678809876556997665862825982578037793778372130681056110061995696129611961195079505950595049363879384338375820471787178705764706006NANA4458NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▃▃▂▂▂▂▂▃▃▃▂▁▁▂▂▃▂▃▃▃▅▆██▇█▇▇█████████-1703-1663-1704-1778-1849-1826-1762-1801-1717-1726-1710-1936-2141-2228-1854-1739-1561-1845-1644-1434-1713-804-425107-3-68-16-118-653546-3052-211038751NANA6NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities █▂▂▂▇▂▄▁▆▂▃▃▄▃▄▅▆▁▃▃▅▄▂▃▆4654-121-108-513895-1771379-10613022-165987411435381106918593106-68579745418831064-171822664NANA716NANANA-552NANANA3261000NANA528591NANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ███████▇▆████▅█▆▆███████▁-170-124-156-129-230-168-108-875-1039-87-267-129-177-2273-192-1154-1329-159-52-17-238-132-195-112-4624NANA-184NANANA-150NANANA-154-158NANA-79-106NANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▃▃▁▄▂▆▂▄▄▃▃▃▄▄▃▃▃▄▃▄▄▄█-2480949-331-872-2544119-13431541-1937125-141-1131-924-1031-32-82-1206-1057-987-203-716-84-1-1673692NANA-73NANANA-425NANANA-668-445NANA-903-184NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities █▂▂▂▇▂▄▁▆▂▃▃▄▃▄▅▆▁▃▃▅▄▂▃▆4654-121-108-513895-1771379-10613022-165987411435381106918593106-68579745418831064-171822664NANA716NANANA-552NANANA3261000NANA528591NANANA
us-gaap:NetIncomeLoss ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▃▃▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃1021186-730423-796469499-138-11469031309358863330754243163461757613247246940337164404424259298401380521300296286422155327298NANANANA
us-gaap:ProfitLoss ▄▃▂▃▂▃▃▂▁▄▃▃█▄▃▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃1078242-677477-744526553-80-108596156365362364632456044464763058914451147741136664404424259298401380NANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▅▂▇▂▄▄█▅▂▄▅▆▃▆█▃▅▃▆▆▁▄█▆2560-250173-229-66-43270-8-227-263991-116117273-18138-139145123-322-10326061NANA285NANANA284NANANA7048NANA90-24NANANA
us-gaap:IncreaseDecreaseInInventories ▃▇▄▄▃▅▅▄▂▅▇▄▂▅▃▄▁▇▆▆▃█▅▆▄-3131020-186-145-388358284114-952193115859-694536-283121-1146928834635-5101493260901-186NANA60NANANA4NANANA303-345NANA28577NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ███████▇▆████▅█▆▆███████▁-170-124-156-129-230-168-108-875-1039-87-267-129-177-2273-192-1154-1329-159-52-17-238-132-195-112-4624NANA-184NANANA-150NANANA-154-158NANA-79-106NANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▄▁▃▄▅▃▃▅▄▃▂▆▃▂▂█▃▃▃▃▃▄▃▃1201163987117131771011361058975158957576216941017790951058686NANA68NANANA46NANANA5876NANA5262NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▃▃▁▄▂▆▂▄▄▃▃▃▄▄▃▃▃▄▃▄▄▄█-2480949-331-872-2544119-13431541-1937125-141-1131-924-1031-32-82-1206-1057-987-203-716-84-1-1673692NANA-73NANANA-425NANANA-668-445NANA-903-184NANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt 0NANANA0NANANA1522NANANANANANANA0000-84164068000891892NANANANANANA1689NANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▃▄▃▂▃▃▂▄▂▂▂▂█▁▁▃▂▃▁▂▁▁▁▁34997517012515005813077582504013002512002058652355500105344131022NA0127NANANA53NANANA672NANANA1016NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value233333333333333333444444444444444444444
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

us-gaap:ConversionOfStockByUniqueDescription

us-gaap:CommonStockParOrStatedValuePerShare

mck:SeparationofChangeHealthcareJV



Period End2020-03-10
Value0.001
Percentage of CommonStockParOrStatedValuePerShare100.0

Shares Outstanding

us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-04-012019-03-312018-12-312018-09-302018-06-302018-04-012018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value272272272271271271271275275275275273271384381376373369359351
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value272272272271271271275275275274274274273273272272271271385385384383383383381380380379376377376375373372371371369365359
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

Weighted Average Number Of Shares Outstanding Basic

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5.891.04-3.992.25-4.172.412.52-0.68-5.584.350.011.4616.922.871.362.411.92.762.662.490.572.032.021.751.610.281.761.861.121.271.71.612.141.221.21.151.650.611.271.121.291.211.131.07
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5.851.03-3.992.24-4.172.42.51-0.68-5.584.330.011.4516.762.851.342.381.882.732.632.450.562.01.991.721.580.281.741.831.11.241.671.582.091.21.181.131.620.61.251.11.261.191.111.06
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value5.861.06-3.992.28-4.172.422.52-0.69-5.584.340.011.4616.952.891.362.911.992.742.682.531.722.042.081.811.590.681.821.841.131.31.691.611.221.21.650.610.991.121.291.21
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value5.821.06-3.992.27-4.172.412.51-0.69-5.584.320.011.4416.792.861.352.881.972.712.652.51.692.012.051.781.560.671.791.811.111.271.661.581.21.181.620.60.971.11.26000000000000021.19
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254700544758440583814134306329543220830620311872985030798316993083930216299802885328247275342745026643282722713026657
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254648444160
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.998.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.998.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value715169316598671067576911663969357176698967736382
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.211.711.512.012.912.312.513.213.913.013.012.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.211.711.512.012.912.312.513.213.913.013.012.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mck:EuropeanPharmaceuticalSolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mck:MedicalSurgicalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value220521412056190319552012194817031725169316601533
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.83.63.63.43.73.63.73.23.33.23.23.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.83.63.63.43.73.63.73.23.33.23.23.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mck:MedicalSurgicalSolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value462744692345979441654089744279416104097739733419694060340282
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.179.379.879.378.078.878.477.977.078.378.078.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.179.379.879.378.078.878.477.977.078.378.078.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments mck:U.S.PharmaceuticalandSpecialtySolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value290531772983295028203006287829922994296630252854
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.45.25.35.45.35.45.75.85.55.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.45.25.35.45.35.45.75.85.55.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

country:US



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value487854931048292463214311046523437744289041426438494255842093
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.383.383.883.182.282.882.581.580.281.881.782.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.383.383.883.182.282.882.581.580.281.881.782.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9750986293249407931996859301971710202976895038958
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.716.716.216.917.817.217.518.519.818.218.317.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.716.716.216.917.817.217.518.519.818.218.317.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5853559172576165572852429562085307552607516285361752061510514871350130499574973346678478994876147546449254700544758440583814134306329543220830620311872985030798316993083930216299802885328247275342745026643282722713026657
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Cost Of Revenue

us-gaap:CostOfRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value55199561395474952941492285323850271498284855350902492274849145917473184720146826438264502745917446984047544063418354126135601324663094530288295192813029198292732856928471271022678626168260582506026817
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax94.394.995.095.093.994.794.794.794.094.994.695.094.394.494.594.293.994.094.294.090.193.793.593.793.394.693.994.094.794.294.894.994.595.093.994.895.094.994.194.9

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value55199561395474952941492285323850271498284855350902492274849145917473184720146826438264502745917446984047544063418354126135601324663094530288295192813029198292732856928471271022678626168260582506026817
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax94.394.995.095.093.994.794.794.794.094.994.695.094.394.494.594.293.994.094.294.090.193.793.593.793.394.693.994.094.794.294.894.994.595.093.994.895.094.994.194.9

Gross Profit

us-gaap:GrossProfit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value33363033286727873201297028042779307527152834256027962812275629072852287228442848291729422923279725401840200919201996166817201600184515661647150917511461136613921583145513351303
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.15.05.06.15.35.35.36.05.15.45.05.75.65.55.86.16.05.86.06.56.36.56.36.75.46.16.06.55.35.85.25.85.15.55.06.15.25.05.15.95.14.94.9

Operating Expenses

us-gaap:OperatingExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-31
Value246726732241215337702287211526964502198420091927-1640198118861935211219521890191720372162213521091984135513301273118311091021107411691037112811549491010946
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.53.93.97.24.14.05.18.73.73.93.8-3.44.03.83.94.54.13.94.04.54.64.84.85.23.94.04.03.83.73.33.53.93.53.94.13.43.83.3

Operating Costs And Expenses

Research And Development Expense

General And Administrative Expense

Selling General And Administrative Expense

Selling And Marketing Expense

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value869360626634-56968368983-9448342396334726831580972740920954931712780788688556485679647485611579492478472623307417474573509
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.50.61.11.1-1.11.21.30.2-1.81.60.51.29.71.71.22.01.61.92.02.01.61.71.81.61.51.42.12.01.62.01.91.61.61.62.21.11.51.72.21.8

Interest Expense

Interest And Debt Expense

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-03-312016-12-312016-09-30
Value6926-78-1008420-952069-342323
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.0-0.1-0.20.10.0-0.20.00.1-0.10.00.0

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value-12143-324426-11326-129-9130303382138-398-109-255255-246-243347-860-416-6779869-55100-61-1671-4120-12811
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.1-0.10.10.0-0.20.0-0.2-0.20.10.60.70.3-0.8-0.2-0.50.5-0.5-0.50.7-1.9-0.9-1.50.20.2-0.20.3-0.2-0.10.2-0.10.1-0.40.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-03-312010-12-312010-09-302010-03-312009-12-31
Value1015191-729429-796470498-139-114890213073595636308655452629623586401474483417367156416420306399379300296422155255348326
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.70.3-1.30.8-1.50.80.9-0.3-2.21.70.00.67.41.30.61.31.01.31.31.20.91.01.10.91.00.51.31.31.01.31.21.01.01.50.50.91.31.2

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value1201294-970619-6336505876-10946971784584674780525912669846880855641696713607465408629594436566531426420416261376440
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.10.5-1.71.1-1.21.21.10.0-2.11.30.30.99.61.61.11.81.41.81.81.81.41.51.61.41.21.21.91.81.41.91.71.41.41.40.91.41.6

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1072247-676483-744527552-81-1087960563633630649325673465642636599411513491425362156416420263306399379422155327298348326301288
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.4-1.20.9-1.40.91.0-0.2-2.11.80.10.77.51.30.71.41.01.31.31.30.91.11.11.00.90.51.31.30.91.01.31.21.50.51.21.11.31.21.11.1

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value12947-2941361111233587-7-263122951044131200239204204244256228183222182103252213174138165151126124130136106121142184161
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.1-0.50.20.20.20.10.2-0.0-0.50.20.22.10.30.40.50.40.40.50.50.50.40.50.40.30.70.60.50.40.60.50.40.40.40.50.40.40.50.70.6

Income Taxes Paid Net

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1078242-677477-744526553-80-108596156365362364632456044464763058914451147741136664404424259298401380
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.4-1.20.9-1.40.91.0-0.2-2.11.80.10.77.41.30.61.11.01.41.31.20.31.11.10.91.00.21.21.30.81.01.31.2

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value981227-656494-819405538-222-11378872275143675259192364715433407855-77793-6351343612506371287477345323172302
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.70.4-1.10.9-1.60.71.0-0.4-2.21.70.41.07.50.50.40.71.50.90.81.8-1.70.2-0.11.21.10.01.51.20.91.61.11.00.61.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value626635604146472185708817251-1718-4840-18-757-64-13-131-416000
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.00.20.10.20.30.1-0.00.0-0.10.1-0.0-0.00.1-0.1-0.0-0.3-0.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value1043293-621554-778451585-201-10529573156863726242210316755415400912-84180-19450945113506371
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.5-1.11.0-1.50.81.1-0.4-2.01.80.61.37.60.50.40.61.60.90.81.9-1.90.2-0.41.21.20.01.51.2

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1021186-730423-796469499-138-11469031309358863330754243163461757613247246940337164404424259298401380521300296286422155327298
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.70.3-1.30.8-1.50.80.9-0.3-2.21.70.00.67.41.30.61.10.91.31.31.20.31.01.00.91.00.21.21.30.81.01.31.21.61.01.01.01.50.51.21.1

Net Income Loss Available To Common Stockholders Basic

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value5756535452575458615855563513171813131313123988-50000000
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.10.00.0-0.00.00.00.00.00.00.00.0

us-gaap:Ownership

mck:VantageandClarusOneSourcingServicesLLC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value484542434146434650464447
Percentage of NetIncomeLossAttributableToNoncontrollingInterest84.280.479.279.678.880.779.679.382.079.380.083.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax mck:VantageandClarusOneSourcingServicesLLC0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value48454243414643465046444724357
Percentage of NetIncomeLossAttributableToNoncontrollingInterest84.280.479.279.678.880.779.679.382.079.380.083.968.623.129.438.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-03-31
Value61247608735899461680596726101161421612826038164213638466181660969578745831557904565635508755819559255387055110522325300651759364793594735491347863343332968317483309333157319073101730886303962818925267
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-03-31
Value695896
Percentage of Assets1.11.5
Percentage of Assets1.11.5
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value34823267273136526363
Percentage of Assets5.75.54.56.011.2
Percentage of Assets5.75.54.56.011.2
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-03-312018-03-31
Value9499782910467
Percentage of Assets15.513.117.3
Percentage of Assets15.513.117.3
Percentage of Assets us-gaap:OperatingSegments mck:EuropeanPharmaceuticalSolutions100.0100.0100.0

us-gaap:OperatingSegments, mck:MedicalSurgicalSolutions



Period End2020-03-312019-03-312018-03-31
Value539552604243
Percentage of Assets8.88.87.0
Percentage of Assets8.88.87.0
Percentage of Assets us-gaap:OperatingSegments mck:MedicalSurgicalSolutions100.0100.0100.0

us-gaap:OperatingSegments, mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-03-312018-03-31
Value349273231031431
Percentage of Assets57.054.152.1
Percentage of Assets57.054.152.1
Percentage of Assets us-gaap:OperatingSegments mck:U.S.PharmaceuticalandSpecialtySolutions100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-03-312018-03-31
Value79441100611509
Percentage of Assets13.018.419.1
Percentage of Assets13.018.419.1
Percentage of Assets us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0

Liabilities

us-gaap:ConsolidatedEntities

us-gaap:Liabilities

us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-03-31
Value8264
Percentage of Liabilities100.0100.0
Percentage of Assets0.10.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary11.87.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value612476087358994616805967261011614216128260381642136384661816609695787458315579045656355087558195592553870551105223253006517593647935947354913478633433329683174833093331573190731017308863039628189
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-12-312011-09-302011-06-302011-03-312010-03-312009-03-31
Value5092617464827874809491859326940798041173411143113031109576929449924989248876878888538001908489318979852270706831745671166917722075326193
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.310.111.012.813.615.115.215.416.218.317.518.318.213.316.216.015.816.115.715.814.916.517.116.916.520.320.622.522.322.323.426.724.5

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value422223939037353384283846538319385443821437136401953979437697369483926841338390383843738261387493857136670371413387933973325732523424545240672317023439230912205423603245692326222374223572169321504
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets68.964.763.362.364.562.862.862.461.562.662.361.060.667.970.967.468.069.569.469.068.167.464.964.162.969.268.367.866.670.170.069.571.374.172.972.172.471.476.3

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-312008-03-31
Value40152065135619472981184921182199267226192563233927832434546446594048340653595635534145873804410541932431296029052456272628312013314941913943311636123213305032653731342821091362
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.63.42.33.25.03.03.43.64.44.14.03.84.64.29.48.07.26.29.610.19.98.37.37.78.16.78.28.27.18.28.66.39.512.612.410.011.710.60.00.013.20.08.30.0

Accounts Receivable Net Current

Receivables Net Current

us-gaap:ReceivablesNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value1995018831189841928718246189321921319093177112001519627191321821518198183081833417980174021679816684159141658115391149201419310750103211001399759962982395649977967395259372918786478075
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.630.932.231.330.631.031.331.229.331.230.730.929.931.431.431.731.831.630.129.829.530.129.528.127.429.528.728.228.729.829.830.130.129.229.930.229.728.428.6

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value1673417020163561660416709169511667116364163101710316885154981527816121152731550015335164111558714932142961537814063141241330811462104841033210335103901007010059100731037694269530922595479441
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.328.027.726.928.027.827.126.727.026.626.425.125.127.926.226.827.129.827.926.726.527.926.926.625.731.429.229.129.731.130.531.730.431.329.530.729.931.433.5

Inventory L I F O Reserve

us-gaap:InventoryLIFOReserve



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value444696906100510127684311201079693
Percentage of InventoryLIFOReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.71.21.51.61.81.40.80.30.30.30.3

Other Assets Current

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value61761865759052958754255844345871972867251352654510741042100513201119595621824879591780817404361367418404329368356333
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.01.11.00.91.00.90.90.70.71.11.21.10.90.90.91.91.91.82.42.11.11.21.61.71.62.22.31.21.11.11.31.21.01.21.11.1

Land

us-gaap:Land



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312011-03-312010-03-31
Value1511721871662282072211297050
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.30.30.40.40.40.40.20.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value41944326393338033784344434012529217520431858
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.87.26.56.26.76.46.67.36.66.66.6

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value18291778146915111506139911791208113210521007
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.03.02.42.52.72.62.33.53.43.43.6

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-03-31
Value23652408249324662548250324882483246424012348234922922411230024302278211221082100204521562174220922221359134813331321124712231221104310151006988991934851796
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.94.04.24.04.34.14.14.14.13.73.73.83.84.23.94.24.03.83.83.83.83.94.24.24.33.73.73.83.83.73.73.83.23.13.23.23.23.13.03.2

us-gaap:StatementGeographical

country:US



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value16421698152913831500127312461205952901764
Percentage of PropertyPlantAndEquipmentNet69.466.662.160.365.862.256.191.291.390.989.8
Percentage of Assets2.72.82.52.32.72.42.43.52.92.92.7
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonUs



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value723850935909778772
Percentage of PropertyPlantAndEquipmentNet30.633.437.939.734.237.8
Percentage of Assets1.21.41.51.51.41.4
Percentage of Assets us-gaap:NonUs0.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-03-31
Value9360945694089441935810519106271058510924118281173211750105861061296931112797869701981199499817995610095104319927630063236262640553105128502550324497448744394364432135683528
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.315.515.915.315.717.217.317.318.118.418.419.017.418.316.619.217.317.617.617.818.218.119.319.719.217.317.617.618.415.915.615.815.213.614.114.314.114.212.714.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value63635740011931210121318502789
Percentage of Goodwill0.70.70.60.40.011.311.411.516.926.3
Percentage of Assets0.10.10.10.10.02.02.02.03.14.6
Percentage of Assets mck:EuropeanPharmaceuticalSolutions0.00.00.00.00.00.00.00.00.00.0

mck:MedicalSurgicalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value2453245324582458245124462445243020702069
Percentage of Goodwill26.225.926.126.026.223.323.023.018.919.5
Percentage of Assets4.04.04.24.04.14.04.04.03.43.4
Percentage of Assets mck:MedicalSurgicalSolutions0.00.00.00.00.00.00.00.00.00.0

mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value4067407840604088407840744083407841103391
Percentage of Goodwill43.543.143.243.343.638.738.438.537.632.0
Percentage of Assets6.66.76.96.66.86.76.66.76.85.6
Percentage of Assets mck:U.S.PharmaceuticalandSpecialtySolutions0.00.00.00.00.00.00.00.00.00.0

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value2777286228332855282928062889286428942337
Percentage of Goodwill29.730.330.130.230.226.727.227.126.522.1
Percentage of Assets4.54.74.84.64.74.64.74.74.83.8
Percentage of Assets us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-31
Value31563364348936003689392041284258410240944206423836653583306131433021310332543426344138644099439050222066215021962270179916991750
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.25.55.95.86.26.46.76.96.86.46.66.96.06.25.25.45.35.65.86.16.47.07.88.39.75.76.06.26.55.45.25.3

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value17001810187419602017212422392314206920222094201915981518125313861328
Percentage of FiniteLivedIntangibleAssetsNet53.953.853.754.454.754.254.254.350.449.449.847.643.642.440.944.144.0
Percentage of Assets2.83.03.23.23.43.53.63.83.43.13.33.32.62.62.12.42.3
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LicensingAgreements



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value260304488591736809
Percentage of FiniteLivedIntangibleAssetsNet8.28.211.916.124.423.5
Percentage of Assets0.40.50.81.01.31.5
Percentage of Assets us-gaap:LicensingAgreements0.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-31
Value525964707984919686931011065758581003644526161808810711344474951434245
Percentage of FiniteLivedIntangibleAssetsNet1.61.81.81.92.12.12.22.32.12.32.42.51.61.61.93.21.21.41.61.81.82.12.12.42.32.12.22.22.22.42.52.6
Percentage of Assets0.10.10.10.10.10.10.10.20.10.10.20.20.10.10.10.20.10.10.10.10.10.10.20.20.20.10.10.10.10.10.10.1
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ServiceAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-31
Value514544558575587597621628651677690691693682668676690692705734742773807825822842864879904924923970
Percentage of FiniteLivedIntangibleAssetsNet16.316.216.016.015.915.215.014.715.916.516.416.318.919.021.821.522.822.321.721.421.620.019.718.816.440.840.240.039.851.454.355.4
Percentage of Assets0.80.90.90.91.01.01.01.01.11.11.11.11.11.21.11.21.21.31.31.31.41.41.51.61.62.32.42.52.62.82.82.9
Percentage of Assets us-gaap:ServiceAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyBasedIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value6465704347505559636977805241013162023293139414664
Percentage of FiniteLivedIntangibleAssetsNet2.01.92.01.21.31.31.31.41.51.71.81.90.10.10.10.30.40.50.60.70.80.81.00.90.92.8
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.10.10.10.10.10.2
Percentage of Assets us-gaap:TechnologyBasedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TrademarksAndTradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value566598601649655651702731745743754734721659376292218210225238233270287309312148154155162
Percentage of FiniteLivedIntangibleAssetsNet17.917.817.218.017.816.617.017.218.218.117.917.319.718.412.39.37.26.86.96.96.87.07.07.06.27.27.27.17.1
Percentage of Assets0.91.01.01.11.11.11.11.21.21.21.21.21.21.10.60.50.40.40.40.40.40.50.50.60.60.40.40.40.5
Percentage of Assets us-gaap:TrademarksAndTradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value225820992082209720992184202520702027199119711927341520001923216630411910189718791897199319852003201515201581163316201638182717701665173517691649156616991481
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.43.53.43.53.63.33.43.43.13.13.15.63.53.33.75.43.53.43.43.53.63.83.83.94.24.44.64.74.95.55.65.05.25.55.35.15.65.3

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value426244005537145379523762637424388633834836685376523776535799356123817437051365743507134479347753467333497327782933729245295012190421379214812135720208207502009721686207151984519142187261968517012
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets69.665.863.061.563.161.363.362.660.858.659.257.958.466.063.563.262.062.662.362.062.259.556.255.257.060.059.560.561.460.462.963.365.562.562.261.760.664.860.3

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value371953274432560340213385332091332273206332177330093358032015310223081131037304242858526854271512631925166252052265622812214291663816435166541610815047155011515116114156771489514547140901358113255
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.753.855.255.256.752.654.152.353.351.452.651.850.953.253.252.550.548.748.647.146.745.743.443.041.445.645.746.946.345.047.047.748.747.346.746.945.644.747.0

Other Liabilities Current

Liabilities Noncurrent

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value738777007644769275958736769477197880804580007949836277008107811081478711920097009709100001000010200103734873358040042296
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.613.012.512.714.312.512.613.112.512.512.913.713.313.914.014.415.816.517.318.018.119.119.220.014.010.813.08.1

us-gaap:BalanceSheetLocation

mck:LongtermDebtCurrentMaturities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-03-31
Value110010003023103301120112611271129531525525105717482166216816129961529
Percentage of LongTermDebt14.913.04.04.04.312.814.614.614.36.66.66.612.622.726.726.719.811.415.7
Percentage of Assets1.81.60.50.50.61.81.81.81.90.80.80.81.73.03.73.72.81.82.8
Percentage of Assets mck:LongtermDebtCurrentMaturities0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType

mck:EuroDenominatedNotes, us-gaap:NetInvestmentHedging, us-gaap:LoansPayable



Period End2020-03-312019-12-312019-03-31
Value170017001950
Percentage of LongTermDebt23.022.125.7
Percentage of Assets2.82.83.3
Percentage of Assets mck:EuroDenominatedNotes us-gaap:NetInvestmentHedging us-gaap:LoansPayable0.00.00.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

mck:FloatingRateEuroNotesDueFebruaryTwelveTwoThousandandTwenty, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value02803370
Percentage of LongTermDebt0.03.74.30.0
Percentage of Assets0.00.50.60.0
Percentage of Assets mck:FloatingRateEuroNotesDueFebruaryTwelveTwoThousandandTwenty us-gaap:LoansPayable0.00.00.00.0

mck:FourPointEightEightPercentNotesDueMarchFifteenthTwoThousandFortyFour, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value411411411800
Percentage of LongTermDebt5.65.45.29.6
Percentage of Assets0.70.70.71.3
Percentage of Assets mck:FourPointEightEightPercentNotesDueMarchFifteenthTwoThousandFortyFour us-gaap:LoansPayable0.00.00.00.0

mck:FourPointSevenFivePercentNotesDuesMarchOneTwoThousandTwentyOne, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value323323323599
Percentage of LongTermDebt4.44.34.17.2
Percentage of Assets0.50.50.51.0
Percentage of Assets mck:FourPointSevenFivePercentNotesDuesMarchOneTwoThousandTwentyOne us-gaap:LoansPayable0.00.00.00.0

mck:NotesDueMay302029, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-31
Value4004000
Percentage of LongTermDebt5.45.30.0
Percentage of Assets0.70.70.0
Percentage of Assets mck:NotesDueMay302029 us-gaap:LoansPayable0.00.00.0

mck:NotesDueNovember302020, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-31
Value7007000
Percentage of LongTermDebt9.59.20.0
Percentage of Assets1.11.20.0
Percentage of Assets mck:NotesDueNovember302020 us-gaap:LoansPayable0.00.00.0

mck:OnePointFiveZeroPercentEuroNotesDueNovemberTwoThousandTwentyFive, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value659670691635
Percentage of LongTermDebt8.98.88.87.6
Percentage of Assets1.11.11.11.0
Percentage of Assets mck:OnePointFiveZeroPercentEuroNotesDueNovemberTwoThousandTwentyFive us-gaap:LoansPayable0.00.00.00.0

mck:OnePointSixThreePercentEuroNotesDueOctoberTwoThousandTwentySix, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value5525606690
Percentage of LongTermDebt7.57.48.50.0
Percentage of Assets0.90.91.10.0
Percentage of Assets mck:OnePointSixThreePercentEuroNotesDueOctoberTwoThousandTwentySix us-gaap:LoansPayable0.00.00.00.0

mck:SevenPointSixFivePercentDebenturesDueMarchOneTwoThousandTwentySeven, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value167167167175
Percentage of LongTermDebt2.32.22.12.1
Percentage of Assets0.30.30.30.3
Percentage of Assets mck:SevenPointSixFivePercentDebenturesDueMarchOneTwoThousandTwentySeven us-gaap:LoansPayable0.00.00.00.0

mck:SixPercentNotesDueMarchOneTwoThousandFortyOne, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value282282282493
Percentage of LongTermDebt3.83.73.65.9
Percentage of Assets0.50.50.50.8
Percentage of Assets mck:SixPercentNotesDueMarchOneTwoThousandFortyOne us-gaap:LoansPayable0.00.00.00.0

mck:ThreePointNineFivePercentNotesDueFebruarySixteenthTwoThousandTwentyEight, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value6006006000
Percentage of LongTermDebt8.17.97.60.0
Percentage of Assets1.01.01.00.0
Percentage of Assets mck:ThreePointNineFivePercentNotesDueFebruarySixteenthTwoThousandTwentyEight us-gaap:LoansPayable0.00.00.00.0

mck:ThreePointOneThreePercentSterlingNotesDueFebruaryTwoThousandTwentyNine, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value557586630564
Percentage of LongTermDebt7.57.78.06.7
Percentage of Assets0.91.01.00.9
Percentage of Assets mck:ThreePointOneThreePercentSterlingNotesDueFebruaryTwoThousandTwentyNine us-gaap:LoansPayable0.00.00.00.0

mck:ZeroPointSixThreePercentEuroNotesDueAugustTwoThousandTwentyOne, us-gaap:LoansPayable



Period End2020-03-312019-03-312018-03-312017-03-31
Value662673695638
Percentage of LongTermDebt9.08.98.87.6
Percentage of Assets1.11.11.21.0
Percentage of Assets mck:ZeroPointSixThreePercentEuroNotesDueAugustTwoThousandTwentyOne us-gaap:LoansPayable0.00.00.00.0

us-gaap:LongtermDebtType

mck:LeaseandOtherObligations



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value17443757544143
Percentage of LongTermDebt2.40.61.00.90.51.5
Percentage of Assets0.30.10.10.10.10.3
Percentage of Assets mck:LeaseandOtherObligations0.00.00.00.00.00.0

Long Term Debt Noncurrent

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value99121203
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0
Percentage of Assets0.00.00.20.3
Percentage of Assets country:US us-gaap:PensionPlansDefinedBenefit0.00.00.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value189355360317
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent2100.03944.4297.5156.2
Percentage of Assets0.30.60.60.5
Percentage of Assets us-gaap:ForeignPlan us-gaap:PensionPlansDefinedBenefit0.00.00.00.0

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value2172112101941932042082402532382192101781601742428484858684721595178617960
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.30.40.30.30.30.30.40.40.40.30.30.30.30.30.40.10.20.20.20.20.13.13.43.50.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value21721121019419320420824025323821921017816017424284841796000
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
Percentage of Assets0.40.30.40.30.30.30.30.40.40.40.30.30.30.30.30.40.10.23.50.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value166218361950201621032195219724482625280720821938177416841727176818092555262527412722273427492855299120272058208018381603143013761504140813681383135313261352
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.73.03.33.33.53.63.64.04.34.43.33.12.92.93.03.13.24.64.74.95.15.05.35.45.85.65.75.95.34.84.34.34.54.24.34.54.44.44.8

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-12-312011-09-302011-06-302011-03-312010-03-312009-03-31
Value5092617464827874809491859326940798041173411143113031109576929449924989248876878888538001908489318979852270706831745671166917722075326193
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.310.111.012.813.615.115.215.416.218.317.518.318.213.316.216.015.816.115.715.814.916.517.116.916.520.320.622.522.322.323.426.724.5

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value233333333333333333444444444444444444444
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value13022120751196512770124091327613354129321298614202133701344213189966390888843836079951378013227127051262812211118001145311138111301078010402103841013597839451898187318486825078767236
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.319.820.320.720.821.821.721.121.522.120.921.721.616.715.615.314.814.524.723.723.622.923.422.322.130.531.030.429.931.130.730.828.627.127.427.426.725.925.7

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value12892108531035396038902858786788098765569976658628259825780377937783721306810561100619956961296119611950795059505950493638793843383758204717871787057647060064458
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.017.817.515.614.914.114.113.212.710.910.410.29.810.06.56.56.65.618.918.018.517.418.418.118.426.126.426.826.926.325.626.424.821.622.522.820.919.815.8

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value-1703-1663-1704-1778-1849-1826-1762-1801-1717-1726-1710-1936-2141-2228-1854-1739-1561-1845-1644-1434-1713-804-425107-3-68-16-118-653546-3052-2110387516
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-2.8-2.7-2.9-2.9-3.1-3.0-2.9-2.9-2.8-2.7-2.7-3.1-3.5-3.8-3.2-3.0-2.8-3.3-2.9-2.6-3.2-1.5-0.80.2-0.0-0.2-0.0-0.3-0.20.10.1-0.10.00.0-0.10.30.30.20.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value4654-121-108-513895-1771379-10613022-165987411435381106918593106-68579745418831064-171822664716-5523261000528591
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.0-0.2-0.2-0.17.4-0.32.6-2.05.9-0.01.11.52.90.82.13.76.7-1.41.61.04.22.3-0.00.47.02.2-1.81.13.51.92.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-170-124-156-129-230-168-108-875-1039-87-267-129-177-2273-192-1154-1329-159-52-17-238-132-195-112-4624-184-150-154-158-79-106
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-0.2-0.3-0.2-0.4-0.3-0.2-1.7-2.0-0.2-0.5-0.3-0.4-4.5-0.4-2.3-2.8-0.3-0.1-0.0-0.5-0.3-0.4-0.3-12.1-0.6-0.5-0.5-0.5-0.3-0.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-2480949-331-872-2544119-13431541-1937125-141-1131-924-1031-32-82-1206-1057-987-203-716-84-1-1673692-73-425-668-445-903-184
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.21.6-0.6-1.6-4.90.2-2.52.9-3.80.2-0.3-2.2-1.9-2.1-0.1-0.2-2.6-2.2-2.0-0.4-1.6-0.2-0.0-0.49.7-0.2-1.4-2.2-1.5-3.3-0.7

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value4654-121-108-513895-1771379-10613022-165987411435381106918593106-68579745418831064-171822664716-5523261000528591
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.0-0.2-0.2-0.17.4-0.32.6-2.05.9-0.01.11.52.90.82.13.76.7-1.41.61.04.22.3-0.00.47.02.2-1.81.13.51.92.2

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1021186-730423-796469499-138-11469031309358863330754243163461757613247246940337164404424259298401380521300296286422155327298
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.70.3-1.30.8-1.50.80.9-0.3-2.21.70.00.67.41.30.61.10.91.31.31.20.31.01.00.91.00.21.21.30.81.01.31.21.61.01.01.01.50.51.21.1

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1078242-677477-744526553-80-108596156365362364632456044464763058914451147741136664404424259298401380
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.4-1.20.9-1.40.91.0-0.2-2.11.80.10.77.41.30.61.11.01.41.31.20.31.11.10.91.00.21.21.30.81.01.31.2

Depreciation Depletion And Amortization

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value2560-250173-229-66-43270-8-227-263991-116117273-18138-139145123-322-10326061285284704890-24
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-3131020-186-145-388358284114-952193115859-694536-283121-1146928834635-5101493260901-186604303-34528577
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-170-124-156-129-230-168-108-875-1039-87-267-129-177-2273-192-1154-1329-159-52-17-238-132-195-112-4624-184-150-154-158-79-106
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-0.2-0.3-0.2-0.4-0.3-0.2-1.7-2.0-0.2-0.5-0.3-0.4-4.5-0.4-2.3-2.8-0.3-0.1-0.0-0.5-0.3-0.4-0.3-12.1-0.6-0.5-0.5-0.5-0.3-0.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value1201163987117131771011361058975158957576216941017790951058686684658765262
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-2480949-331-872-2544119-13431541-1937125-141-1131-924-1031-32-82-1206-1057-987-203-716-84-1-1673692-73-425-668-445-903-184
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.21.6-0.6-1.6-4.90.2-2.52.9-3.80.2-0.3-2.2-1.9-2.1-0.1-0.2-2.6-2.2-2.0-0.4-1.6-0.2-0.0-0.49.7-0.2-1.4-2.2-1.5-3.3-0.7

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-03-312018-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-052014-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-042012-12-312011-02-282011-03-312009-02-28
Value0015220000-841640684068411400089189289216731689699
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

Payments Of Dividends

Payments Of Dividends

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302012-06-302011-06-302010-06-30
Value349975170125150058130775825040130025120020586523555001053441310220127536721016
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value2334456789161926
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value180.48166.72161.27145.76118.9595.0178.0765.7956.8849.0141.2639.2848.59
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

Share Based Compensation

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-12-312010-03-31
Value219626862718305829402983284428252755375236502884263227892675-2602-280131142495-2261170-1845
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value98967880111561272118913321247133512971187
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-09-302015-06-302015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value95810521183486555548497616647560595635619526496
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value833870751503267229270118101-99-97
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-30
Value1886201320022031
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-31
Value40232065135619472981184921182199267226192565234142544992
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mck:AssetImpairmentChargeNetofTax

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-31
Value1353
Percentage of AssetImpairmentChargeNetofTax100.0100.0

mck:CorporateOperatingExpenseandOtherIncomeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value267211364175214190167123227120108109
Percentage of CorporateOperatingExpenseandOtherIncomeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

mck:DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDuetoSettlementNetofTax

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-30
Value0-78-12
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDuetoSettlementNetofTax0.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

mck:EquityMethodInvestmentOtherthanTemporaryImpairmentNetofTax

mck:ChangeHealthcareLLCChangeHealthcare, us-gaap:CorporateJointVenture



Period End2020-03-312019-09-30
Value0864
Percentage of EquityMethodInvestmentOtherthanTemporaryImpairmentNetofTax0.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

mck:EquityMethodInvestmentRealizedGainLossonDisposalNetofTax

mck:ChangeHealthcareLLCChangeHealthcare, us-gaap:AllOtherSegments



Period End2020-03-31
Value414
Percentage of EquityMethodInvestmentRealizedGainLossonDisposalNetofTax100.0

mck:ExchangeOfferSharesDistributed



Period End2020-03-09
Value176
Percentage of ExchangeOfferSharesDistributed100.0

us-gaap:ConversionOfStockByUniqueDescription

mck:SeparationofChangeHealthcareJV



Period End2020-03-09
Value176
Percentage of ExchangeOfferSharesDistributed100.0

mck:InventoryLIFOReservePeriodChargeNetofTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-101-49-25-11-109-15-17-15
Percentage of InventoryLIFOReservePeriodChargeNetofTax100.0100.0100.0100.0100.0100.0100.0100.0

mck:NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1069231-688466-755515542-92
Percentage of NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4845424341464346
Percentage of NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest4.519.5-6.19.2-5.48.97.9-50.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1021186-730423-796469499-138
Percentage of NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest95.580.5106.190.8105.491.192.1150.0

us-gaap:StatementEquityComponents

mck:NoncontrollingInterestIncreaseDecreaseDuetoOther

mck:RedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value033000000000-1000
Percentage of NoncontrollingInterestIncreaseDecreaseDuetoOther0.0100.0100.00.00.00.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-3-511-3-11-13-335-10-1-63-2-25-6-1
Percentage of NoncontrollingInterestIncreaseDecreaseDuetoOther0.0-166.7366.70.00.00.00.00.00.00.00.00.0200.00.00.00.0

us-gaap:StatementEquityComponents

mck:ReclassificationofTemporaryEquitytoLiability

mck:RedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value911111111111112111211911101211
Percentage of ReclassificationofTemporaryEquitytoLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Ownership, us-gaap:SubsequentEventType

mck:RepurchaseofRedeemableNoncontrollingInterestSharesRepurchased

mck:MckessonEuropeSubsidiary, us-gaap:SubsequentEvent



Period End2020-04-30
Value1
Percentage of RepurchaseofRedeemableNoncontrollingInterestSharesRepurchased100.0

us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

mck:RestructuringChargesNetofTax

mck:EmployeeRetentionExpensesAssetImpairmentsandAcceleratedDepreciation, mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquarters



Period End2020-03-312019-12-312019-09-30
Value7109
Percentage of RestructuringChargesNetofTax100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2530342621222425
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2530342621222425
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value119113118112120122121122133123126121112102115115102108109112108125131130130707071534851495048
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value-83307519035161005390
Percentage of AssetImpairmentCharges100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-31
Value1864
Percentage of AssetImpairmentCharges-21.7213.3

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1958709-591-10341132-269-81-4735354224-1913
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-12-312019-09-302019-07-312019-06-302019-06-302019-03-312018-12-312018-09-302018-07-312018-06-302018-03-312017-12-312017-07-262017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-07-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-07-262013-07-252013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-04-302011-03-312010-12-312010-09-302010-05-312010-06-302010-03-312009-12-312009-01-31
Value0.410000000000000140.410.410.410.390.390.38999999999999990.390.390.390.340.34000000000000010.340.340.340.280.280000000000000140.280.280.280.280.280.280.280.240.240.240.240.240.240.240.240.20.240.20.20.20.20.20.20.20.180.179999999999999940.180.180.180.180.120.120.12
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-30
Value0-244105-17
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements10.0100.0100.0100.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7373757376757869
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7373757376757869
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-46541811-43-9-787343475
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

mck:ChangeHealthcareLLCChangeHealthcare, us-gaap:CorporateJointVenture



Period End2020-03-312019-09-30
Value01157
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal

mck:ChangeHealthcareLLCChangeHealthcare



Period End2020-03-09
Value414
Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

mck:ChangeHealthcareLLCChangeHealthcare, us-gaap:AllOtherSegments



Period End2020-03-31
Value414
Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal0.0

us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee

us-gaap:CorporateJointVenture



Period End2020-03-312019-09-30
Value0-246
Percentage of GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee0.0100.0

us-gaap:LitigationCase

us-gaap:GainLossRelatedToLitigationSettlement

mck:ForTwoCountiesInreNationalPrescriptionOpiateLitigation



Period End2020-03-312019-09-30
Value0-82
Percentage of GainLossRelatedToLitigationSettlement0.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-11653-503523-1056-1706917188230-77121742162
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-64-1014-27-10-98
Percentage of GoodwillForeignCurrencyTranslationGainLoss5.27.52.00.060.925.7-166.757.6

mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1118-279-13-9-4-36
Percentage of GoodwillForeignCurrencyTranslationGainLoss9.534.054.025.7-56.58.6-66.721.2

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-9931-222622-6920-36
Percentage of GoodwillForeignCurrencyTranslationGainLoss85.358.544.074.395.765.7333.321.2

us-gaap:GoodwillImpairmentLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-03-312015-12-312015-09-302013-03-31
Value020012062105701388035000029000036
Percentage of GoodwillImpairmentLoss0.0100.00.00.0100.0100.00.0100.0100.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-03-312018-12-312018-09-302018-06-30
Value0120600570
Percentage of GoodwillImpairmentLoss0.0100.00.00.0100.0

us-gaap:AllOtherSegments



Period End2020-03-312019-03-312018-12-312018-09-302018-06-30
Value002100
Percentage of GoodwillImpairmentLoss0.00.0100.00.00.0

us-gaap:GoodwillOtherIncreaseDecrease



Period End2020-03-31
Value0.0
Percentage of GoodwillOtherIncreaseDecrease0.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-31
Value0.0
Percentage of GoodwillOtherIncreaseDecrease0.0

mck:MedicalSurgicalSolutions



Period End2020-03-31
Value0.0
Percentage of GoodwillOtherIncreaseDecrease0.0

mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-31
Value0.0
Percentage of GoodwillOtherIncreaseDecrease0.0

us-gaap:AllOtherSegments



Period End2020-03-31
Value0.0
Percentage of GoodwillOtherIncreaseDecrease0.0

us-gaap:GoodwillPurchaseAccountingAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value01294-4251052713-6-4543-1452000814165-26445
Percentage of GoodwillPurchaseAccountingAdjustments0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0031-1-510
Percentage of GoodwillPurchaseAccountingAdjustments0.00.0150.011.1-25.0125.04.00.0

mck:MedicalSurgicalSolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value000751150
Percentage of GoodwillPurchaseAccountingAdjustments0.00.00.077.8125.0-25.060.00.0

mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value01-110094
Percentage of GoodwillPurchaseAccountingAdjustments0.0100.0-50.011.10.0-0.036.040.0

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00000006
Percentage of GoodwillPurchaseAccountingAdjustments0.00.00.00.00.0-0.00.060.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value6-5-1-60-1112102-7-3-1-113-215-6-10-267-2-14-144-92-124-4-821
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-03-312010-12-312010-09-302010-06-30
Value0.03-0.020.0-0.030.0-0.010.00.010.00.010.00.0-0.03-0.020.0-0.5-0.090.02-0.02-0.04-1.15-0.01-0.06-0.060.02-0.4-0.060.02-0.01-0.030.010.00.00.00.280.0
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare100.0100.00.0100.00.0100.00.0100.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-03-312010-12-312010-09-302010-06-30
Value0.03-0.030.0-0.030.0-0.010.00.010.00.010.00.01-0.03-0.01-0.01-0.5-0.090.02-0.02-0.05-1.13-0.01-0.06-0.060.02-0.39-0.050.02-0.01-0.030.010.00.00.00.280.0
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1514-28-14544205-50-56-5623-90-61-12030000
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mck:ChangeHealthcareLLCChangeHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-44-28-514-32-50-56-5623-90-61-120
Percentage of IncomeLossFromEquityMethodInvestments-2.9100.03.5100.0-15.6100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

mck:ChangeHealthcareLLCChangeHealthcare, us-gaap:CorporateJointVenture



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-44-28-514-32-50-56-5623-90
Percentage of IncomeLossFromEquityMethodInvestments-2.9100.03.5100.0-15.6100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value4881274-13301271801-1022116532-932-6051345463179-28162315491607-2659571003554266213413681828592-93644548180209
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedTaxesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-30
Value-19-59-128236-32-38-61-18603104-1894-995695-192-89-2205-19-13768-1346433-14243
Percentage of IncreaseDecreaseInAccruedTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-30
Value-457396-16-19-110-15-452188943-85-760-212121-31-34-70-23-1165525-13570-98-170-31
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value1450178-1951061-576-1622911414-2221234449363108-3357300290630288749-11129783669920145-444195475-172-282
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value110101100111112112222223
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.00.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryLIFOReservePeriodCharge



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-138-66-33-15-146-21-22-21-94-2-2926144-155-43472933919150959498125142440
Percentage of InventoryLIFOReservePeriodCharge100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3939373941374264
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value393937394137426425262918
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:Ownership

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

mck:MckessonEuropeSubsidiary



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9111111111111121112119
Percentage of NetIncomeLossAttributableToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mck:RedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value911111111111112111211911101211
Percentage of NetIncomeLossAttributableToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-3345-2364-38-7629-12131-5258320100-406-115-267307-247
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mck:AccumulatedDefinedBenefitPlansAdjustmentAmortizationofActuarialLossPriorServiceCostandTransitionObligationIncludingPortionAttributabletoNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2-211413121113213
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-6.1-4.4-4.31.6-10.5-1.310.3-0.86.5-20.00.40.33.0-0.5-0.9-1.1

mck:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceandNetGainLossIncludingPortionAttributabletoNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value300-96-5100025000-20000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-90.90.039.19.4134.2-0.00.0-0.080.6-0.00.00.0-20.0-0.0-0.0-0.0

mck:AccumulatedDefinedBenefitPlansForeignCurrencyAdjustmentIncludingPortionAttributabletoNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value5-6520217-50-4-6-11608
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-15.2-13.3-21.73.1-0.0-2.63.4-5.8-16.1-0.0-1.6-1.9-11.0-1.5-0.0-3.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value35-6-48-51218-6
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-106.1-13.317.412.5134.2-2.63.4-6.6-1.9

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-208101-1147025-1885-2738930303382138-398-109-275
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax630.3224.4495.7109.4-65.8247.417.2225.6287.1-600.0117.4119.4138.098.094.8103.0

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value87-5882-2617521144-53-19-38-70-8000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-263.6-128.9-356.5-40.6-2.6-98.772.4-119.0-171.0380.0-14.7-21.9-8.0-0.0-0.0-0.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value31-2129-9-14277-51-17-9-25-44-5000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5381312-133520-25-16
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-35515677-34-7532-12133-4259321103-404-114-244311-232-230323-985-431-6719886-52102-53
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3307521-47348221-3-5-288111
Percentage of OtherComprehensiveIncomeLossNetOfTax-94.30.0133.927.3138.2-4.012.5-6.666.7-25.0-1.2-1.6-27.2-2.0-0.9-4.5

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value3307521-47348-5
Percentage of OtherComprehensiveIncomeLossNetOfTax-94.30.0133.927.3138.2-4.012.5-6.6-1.6

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-208101-1147025-1885-2738930303382138-398-109-255
Percentage of OtherComprehensiveIncomeLossNetOfTax594.3198.0-203.690.9-73.5250.715.6225.6269.7-750.0117.0119.0134.098.595.6104.5

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value87-5882-2617521144-53-19-38-70-8000
Percentage of OtherComprehensiveIncomeLossNetOfTax-248.6-113.7146.4-33.8-2.9-100.065.6-119.0-160.6475.0-14.7-21.8-7.8-0.0-0.0-0.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value510-186-11-11-7-3724123311616-301-6627-31
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mck:RedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-110-186-11-11-7-3724123311617-301-66
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest-20.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0106.2100.0100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value3-210-70021
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest60.0-20.0-5.60.063.6-0.0-0.0-5.40.9

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value212-196-4-11-7-39291233115
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest40.0120.0105.6100.036.4100.0100.0105.4120.8100.0100.099.1

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value-40417471-23-6439-849-1622620587-374-115-178284-20186-52102-53-1176-3523-12416
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value3027421-40346-6
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-75.04.9100.029.6173.9-4.710.3-7.1-2.9

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-21089-956429-17712-2346018270267
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent525.0217.1-128.490.1-126.1276.630.8278.6666.7-112.5119.5130.2

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value87-5882-2617521144-53-19-38-70
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-217.5-141.5110.8-36.6-4.3-117.253.8-171.4-588.9118.8-16.8-34.1

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-40417471-23-6439-84
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-30
Value-330-75-2147-3-4-8-22-13528-8-1-11-52-15-112811616-6-2-21-4-4-7-5-3-6
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302010-06-30
Value-73-398-23-121-68-1225979-13010436-8-38-4524-2931-132-3831-10071-4-14-47-326-39-12
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value3-3234-28592037-96-181028-2518-15355121213-25-32525-212910-42-6038-855
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Ownership, us-gaap:SubsequentEventType

us-gaap:PaymentsForRepurchaseOfRedeemableNoncontrollingInterest

mck:MckessonEuropeSubsidiary, us-gaap:SubsequentEvent



Period End2020-04-30
Value46
Percentage of PaymentsForRepurchaseOfRedeemableNoncontrollingInterest100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302010-06-30
Value7274737576776871707159626163636665655559565656596053534733
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-03-31
Value3624946392614826914105389148563213322218191514561309171445187410810600
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:PaymentsToAcquireSoftware



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-30
Value483834243526264452324843353451384449534350384833333233
Percentage of PaymentsToAcquireSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-30
Value24115622298162218315627311439362625343837493234275043
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-302011-03-312010-06-302010-03-31
Value-22-50-111-118-99-55-69-132-46-30-35-74-301-31478-28-6722-5621-3226-545738-575242
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-30
Value558571826060261068731065710699903678434235618222825491279337293197053164966187391759951000
Percentage of ProceedsFromShortTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2-6-79-13-4-1-30-2-1-1-1-3-2-1-23-4-15
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value4-8-78-1200000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax200.0133.398.792.3-0.0-0.0-0.00.0-0.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value2-6-79-13-4-1-30-1
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value000000000000000-20
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.087.0

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-683-2750000
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.00.00.00.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

mck:McKessonFoundation



Period End2020-03-31
Value20
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0

us-gaap:RepaymentsOfShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302012-06-302011-06-30
Value76945621551226107922110041133770058592379058802463671913883142016796753482575581375959721004000
Percentage of RepaymentsOfShortTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:RestructuringCharges

mck:EmployeeRetentionExpensesAssetImpairmentsandAcceleratedDepreciation, mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquarters



Period End2020-03-312019-12-312019-09-30
Value101412
Percentage of RestructuringCharges100.0100.0100.0

us-gaap:RestructuringPlan

mck:StrategicGrowthInitiativePlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value121334170505358
Percentage of RestructuringCharges1210.021.425.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-03-312018-12-31
Value0.00.01000000.00.01000000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans0.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302011-03-312010-12-312010-03-312009-12-31
Value21115652881611-3-2-2-2
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value241156222981622
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan114.3100.0100.0440.0103.6100.0100.0200.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-300-17-100-11
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan-14.30.00.0-340.0-3.60.00.0-100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodShares

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value03653343
Percentage of StockRepurchasedDuringPeriodShares0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302016-09-30
Value05007506842505005802970
Percentage of StockRepurchasedDuringPeriodValue0.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0500750684315450580432
Percentage of StockRepurchasedDuringPeriodValue0.0100.0100.0100.0126.090.0100.0145.5

us-gaap:StockholdersEquityOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value38-10271334-6
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value35-113111333-5
Percentage of StockholdersEquityOther100.062.5110.0150.0157.1100.097.183.3

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312018-09-302018-06-30
Value13-11
Percentage of StockholdersEquityOther33.337.5-2.9-16.7

us-gaap:TreasuryStockSharesRetired



Period End2020-03-092013-03-31
Value151
Percentage of TreasuryStockSharesRetired100.0100.0

mck:AccountsReceivableCustomerAccountsGross



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value17201149411434914602145191311712169
Percentage of AccountsReceivableCustomerAccountsGross100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConversionOfStockByUniqueDescription

mck:CommonStockConversionBasisNumberofSharesIssuedForEachShareConverted

mck:SeparationofChangeHealthcareJV



Period End2020-03-10
Value1.0
Percentage of CommonStockConversionBasisNumberofSharesIssuedForEachShareConverted100.0

us-gaap:LitigationCase, us-gaap:LitigationStatus, us-gaap:SubsequentEventType, dei:LegalEntity

mck:LossContingencySettlementAgreementTermsNumberofCompaniestoAdoptAntiDiversionProgramsChanges

mck:InreNationalPrescriptionOpiateLitigation, us-gaap:PendingLitigation, us-gaap:SubsequentEvent, mck:ThreeLargestU.S.PharmaceuticalDistributors



Period End2020-01-06
Value3.0
Percentage of LossContingencySettlementAgreementTermsNumberofCompaniestoAdoptAntiDiversionProgramsChanges100.0

us-gaap:Ownership

mck:NoncontrollingInterestsPutRightExercisePrice

mck:MckessonEuropeSubsidiary



Period End2020-03-312019-03-312018-09-19
Value22.9922.9923.5
Percentage of NoncontrollingInterestsPutRightExercisePrice100.0100.0100.0

mck:OtherCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0221222111342
Percentage of OtherCapital0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanName, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

mck:PensionAndOtherPostretirementDefinedBenefitPlansPlanAssetValue

mck:NorwegianPublicServicePensionFundSPK, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value29353837
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansPlanAssetValue100.0100.0100.0100.0

us-gaap:Ownership

mck:RedeemableNoncontrollingInterestsMaximumRedemptionValue

mck:MckessonEuropeSubsidiary



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value1220124012001250123012581270128013471210
Percentage of RedeemableNoncontrollingInterestsMaximumRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mck:SECSchedule1209ValuationAllowancesandReservesCurrentAmount



Period End2020-03-312019-03-312018-03-31
Value265279216
Percentage of SECSchedule1209ValuationAllowancesandReservesCurrentAmount100.0100.0100.0

us-gaap:LossContingenciesByNatureOfContingency

mck:SiteContingencyNumberofSites

mck:EnvironmentalLitigation



Period End2020-03-31
Value5.0
Percentage of SiteContingencyNumberofSites100.0

us-gaap:AccountsReceivableGrossCurrent



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value202151852517927184951823016082125438683856279827256
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingenciesByNatureOfContingency

us-gaap:AccrualForEnvironmentalLossContingenciesGross

mck:EnvironmentalLitigation



Period End2020-03-31
Value10
Percentage of AccrualForEnvironmentalLossContingenciesGross100.0

us-gaap:AccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value33403359337232483443316531163125331632953291297730043113297331623948364436503892376932242992312134782108200619081912170515031587214921201980182018611559
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:UnfundedPlan, country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-31
Value112
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value095121115117118120
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax0.00.01008.30.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value666366146573648364356321641163726188625361416080602860375994592358455793721271216968687567596686655264426357622960786005594858095571564155735376533951534756
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value265279216280250168130131122136
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent



Period End2020-03-312019-12-312019-03-312016-12-312016-09-302016-03-31
Value906856020021767635
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.00.0100.0100.0100.0

us-gaap:DisposalGroupClassification

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations



Period End2020-03-312019-12-31
Value906856
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, mck:GermanWholesaleBusiness



Period End2020-03-312019-12-31
Value842813
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent92.995.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationLiability

mck:CoverMyMedsLLC



Period End2020-03-312019-03-312018-03-312017-04-03
Value069124113
Percentage of BusinessCombinationContingentConsiderationLiability0.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value13001246118211771130111210041011902778
Percentage of CapitalizedComputerSoftwareAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value400394425455435435514465445446
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value200012057994782413288022841036805
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DebtInstrumentFairValue

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-31
Value78008200830081007900900077007800810085008500840087008000880088008600900096009900104001050010500107001080051005200520055004100
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet



Period End2020-03-312019-03-31
Value5958
Percentage of DeferredIncomeTaxAssetsNet100.0100.0

us-gaap:DeferredIncomeTaxLiabilities



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value31853618355648063947-3791-4133-3114
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-03-31
Value225529982804283337243678
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value18221548155216591539141816021365143613961284
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value109216279222275266289264256241235
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value828885811594367316430341400494481
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value331377345593710681641553447409349
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value7270581241108310684444856
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value194720161869281826192333216320891635-1450-1363
Percentage of DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-12-312010-03-31
Value53151364492198110731531734544-532339-209
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value08858147730
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates0.0100.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value5634717021611182453-58-63
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value202170158224326324321267263-221-210
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value10439485513
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value856949990902
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation8560.0216.2204.1175.8

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value1133134157
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value146182157157
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax14600.0136.8117.2100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-1-133-134-157
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-149-186-162-160
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax14900.0139.8120.9101.9

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-3-4-5-3
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-10-117-150-220
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-302-348-348-320
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet3020.0297.4232.0145.5

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value07100
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent0.0100.0100.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value4920194
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent0.0285.7190.00.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value0.03080.03650.03690.0339
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value0.02030.02130.02350.0235
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate65.958.463.769.3

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:UnfundedPlan, country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value10124160176
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0

us-gaap:UnfundedPlan, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value298293297276
Percentage of DefinedBenefitPlanBenefitObligation2980.0236.3185.6156.8

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value10439485513535
Percentage of DefinedBenefitPlanBenefitObligation100.0354.0303.1291.50.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value8969901035943899
Percentage of DefinedBenefitPlanBenefitObligation8960.0798.4646.9535.80.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value6573788298
Percentage of DefinedBenefitPlanBenefitObligation650.058.948.846.60.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-5-11914
Percentage of DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear100.0100.0100.0100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-10-117-150-220
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value-302-348-348-320
Percentage of DefinedBenefitPlanFundedStatusOfPlan3020.0297.4232.0145.5

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

us-gaap:DerivativeAssetNotionalAmount

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-31
Value2432221655146253213284613919898139680493
Percentage of DerivativeAssetNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-31
Value0.0
Percentage of DerivativeAssetNotionalAmount0.0

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

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherNoncurrentAssets, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-312016-09-302016-06-30
Value1825968159117344450901307449
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-31
Value112244937040312600211170
Percentage of DerivativeFairValueOfDerivativeAsset61.540.772.1246.70.023.170.557.80.00.00.00.018.90.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-31
Value016171617191516151413161717161614
Percentage of DerivativeFairValueOfDerivativeAsset0.027.125.0106.718.711.034.135.60.00.00.00.018.923.032.70.00.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-31
Value230000000011126237
Percentage of DerivativeFairValueOfDerivativeAsset1.15.10.00.00.00.00.00.00.00.00.00.01.12.712.20.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-03-31
Value29499134681082501051032941415715619914062
Percentage of DerivativeFairValueOfDerivativeAsset161.5167.8197.1453.3118.7144.5238.6228.90.00.00.00.0173.3153.1189.20.0

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2300000000111526232526170322
Percentage of DerivativeFairValueOfDerivativeAsset1.15.10.00.00.00.00.00.00.00.00.00.01.13.82.712.20.00.00.00.00.00.00.00.00.0

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

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherCurrentLiabilities, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1914128181612107
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentLiabilities, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-31
Value000000000014000079
Percentage of DerivativeFairValueOfDerivativeLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-03-31
Value039561334911511522216313226080
Percentage of DerivativeFairValueOfDerivativeLiability0.0278.641.7762.5183.3306.2958.31150.03171.40.00.00.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-03-31
Value195317695165127125229163132260008
Percentage of DerivativeFairValueOfDerivativeLiability100.0378.6141.7862.5283.3406.21058.31250.03271.40.00.00.00.00.00.00.0

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00000000001400000107517934472614
Percentage of DerivativeFairValueOfDerivativeLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:DerivativeLiabilityNotionalAmount

mck:OtherNoncurrentAssetsLiabilities, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-03-31
Value33135283
Percentage of DerivativeLiabilityNotionalAmount100.0100.0

mck:PrepaidExpensesandOtherAssetsOtherAccruedLiabilities, us-gaap:CurrencySwap, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-03-31
Value12790
Percentage of DerivativeLiabilityNotionalAmount38.60.0

us-gaap:OtherCurrentLiabilities, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-31
Value51423314415716621205374591961262
Percentage of DerivativeLiabilityNotionalAmount0.20.00.00.00.30.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

currency:GBP, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated



Period End2020-03-312019-03-31
Value2928
Percentage of DerivativeNotionalAmount100.0100.0

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

mck:November2018CrossCurrencySwaps, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value15001500149914991499
Percentage of DerivativeNotionalAmount5172.40.00.00.05353.6

us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

mck:RestrictedStockUnitsandPerformancebasedStockUnits



Period End2020-03-312019-03-312018-03-31
Value15511997
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0

us-gaap:EmployeeStockOption



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value6151521202229
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized3.912.615.50.00.00.00.0

us-gaap:EquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-31
Value02143216736173513356636093672372837043795385540630
Percentage of EquityMethodInvestments0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-30
Value16616315693
Percentage of FinanceLeaseLiability100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value323630623152308229753146306629352579238424302250209319811909221121192059196618911763168515801465133112261158112410771015961910865821773728-680-631-545
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value19501792191318711801185617971724155014581378139212951225118213831324
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization60.358.560.760.760.559.058.658.760.161.256.761.961.961.861.962.662.5

us-gaap:LicensingAgreements



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value23220919615012165
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization7.27.07.67.25.73.7

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value22121921121220920119718917617016315514414114513412711911611410189816652423837383535333128282624
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.87.26.76.97.06.46.46.46.87.16.76.96.97.17.66.16.05.85.96.05.75.35.14.53.93.43.33.33.53.43.63.63.63.43.63.6-3.5

us-gaap:ServiceAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value48047946144743041440639238636635133231630028728326925124023021520720218917315714512911498806552463422-110
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization14.815.614.614.514.513.213.213.415.015.414.414.815.115.115.012.812.712.212.212.212.212.312.812.913.012.812.511.510.69.78.37.16.05.64.43.01.6-0.0

us-gaap:TechnologyBasedIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value111108108989489868784797471646362185182193189187184182178177173207
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization3.43.53.43.23.22.82.83.03.33.33.03.23.13.23.28.48.69.49.69.910.410.811.312.113.019.2

us-gaap:TrademarksAndTradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value242235251244232233223207187171156136124111999996909087827973685953514746
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization7.57.78.07.97.87.47.37.17.37.26.46.05.95.65.24.54.54.44.64.64.74.74.64.64.44.34.44.24.3

us-gaap:FiniteLivedIntangibleAssetsGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value639264266641668266647066719471936681647866366488575855644970535451405162522053175204554956795855635332923308332033472814266025882615216221562142213622271096
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value36503602378738313818398040364038361934803472341128932743243527692652
Percentage of FiniteLivedIntangibleAssetsGross57.156.157.057.357.356.356.156.154.253.752.352.650.249.349.051.751.6

us-gaap:LicensingAgreements



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value492513684741857874
Percentage of FiniteLivedIntangibleAssetsGross7.77.710.212.916.716.8

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value273278275282288285288285262263264261201199203234163163168175162169169173165868586897877787676767676
Percentage of FiniteLivedIntangibleAssetsGross4.34.34.14.24.34.04.04.03.94.14.04.03.53.64.14.43.23.23.23.33.13.03.03.02.62.62.62.62.72.82.93.02.93.53.53.53.6

us-gaap:ServiceAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value994102310191022101710111027102010371043104110231009982955959959943945964957980100910149959991009100810181022100399410227016966887237230
Percentage of FiniteLivedIntangibleAssetsGross15.615.915.315.315.314.314.314.215.516.115.715.817.517.619.217.918.718.318.118.118.417.717.817.315.730.330.530.430.436.337.738.439.132.432.332.133.832.50.0

us-gaap:TechnologyBasedIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value175173178141141139141146147148151151696566195195209209210213213217218219271
Percentage of FiniteLivedIntangibleAssetsGross2.72.72.72.12.12.02.02.02.22.32.32.31.21.21.33.63.84.04.03.94.13.83.83.73.48.1

us-gaap:TrademarksAndTradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value808833852893887884925938932914910870845770475391314300315325315349360377371201205202208
Percentage of FiniteLivedIntangibleAssetsGross12.613.012.813.413.312.512.913.014.014.113.713.414.713.89.67.36.15.86.06.16.16.36.36.45.86.16.26.16.2

us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3100291329431736177617931299
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllOtherSegments



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value478470461452456448456
Percentage of GoodwillImpairedAccumulatedImpairmentLoss15.416.115.726.025.725.035.1

us-gaap:GuaranteeObligationsByNature

us-gaap:GuaranteeObligationsMaximumExposure

mck:GuaranteeObligationsCustomersDebt



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value12911510498139183
Percentage of GuaranteeObligationsMaximumExposure100.0100.0100.0100.0100.0100.0

mck:GuaranteeObligationsInventoryRepurchaseGuarantees



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value274251234226201185204
Percentage of GuaranteeObligationsMaximumExposure212.4218.3225.0230.6144.6101.10.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent



Period End2020-03-312019-12-312019-03-312016-12-312016-09-302016-03-31
Value6834710694604660
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.00.0100.0100.0100.0

us-gaap:DisposalGroupClassification

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations



Period End2020-03-312019-12-31
Value683471
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, mck:GermanWholesaleBusiness



Period End2020-03-312019-12-31
Value656453
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent96.096.2

us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302015-11-30
Value400040004000350035003500350035003500350035003500350035003500
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312010-12-312010-03-31
Value63357265675173056535818089494521452145224521397330733072307223052293
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312010-12-312010-03-31
Value10523301129105716121529142435335335235250650850850817573
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LitigationCase

us-gaap:LossContingencyPendingClaimsNumber

mck:InreNationalPrescriptionOpiateLitigation



Period End2020-03-312019-12-312019-09-302019-06-30
Value2800.02700.02300.02000.0
Percentage of LossContingencyPendingClaimsNumber100.0100.0100.0100.0

us-gaap:LossContingenciesByNatureOfContingency

mck:InvestigationintoFactorsContributingtoIncreaseinOpioidrelatedHospitalizationsandDeaths



Period End2020-03-312019-03-31
Value385.0240.0
Percentage of LossContingencyPendingClaimsNumber13.80.0

us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByParent

mck:MckessonEuropeSubsidiary



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value0.770.770.770.770.770.770.770.770.770.76
Percentage of MinorityInterestOwnershipPercentageByParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Ownership, us-gaap:SubsequentEventType

mck:MckessonEuropeSubsidiary, us-gaap:SubsequentEvent



Period End2020-04-30
Value0.78
Percentage of MinorityInterestOwnershipPercentageByParent0.0

us-gaap:NotesAndLoansPayable



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value7400760079008400810097001040049004900490049004500360036003600
Percentage of NotesAndLoansPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-30
Value2014214521252178
Percentage of OperatingLeaseLiability100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-30
Value354365362373
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-30
Value1660178017631805
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0

us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value7592111126354453106
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value1900214318061367889711935309
Percentage of OperatingLossCarryforwards2533.32329.31627.01084.92540.01615.91764.2291.5

us-gaap:StateAndLocalJurisdiction



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value33003551278720991790193025242697
Percentage of OperatingLossCarryforwards4400.03859.82510.81665.95114.34386.44762.32544.3

us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:ForeignCountry, us-gaap:CapitalLossCarryforward



Period End2020-03-31
Value739
Percentage of OperatingLossCarryforwards985.3

us-gaap:OtherReceivablesGrossCurrent



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value3014358435783893371129651780142315371341
Percentage of OtherReceivablesGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-31
Value151
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0

us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

country:US, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value11153917
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities0.70.00.00.0

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value1621377
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities107.30.00.00.0

us-gaap:PercentageOfLIFOInventory



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value0.60.620.630.70.740.730.670.80.880.870.87
Percentage of PercentageOfLIFOInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOther



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312011-03-312010-03-31
Value4043415437463637355632373180240019731808
Percentage of PropertyPlantAndEquipmentOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RedeemableNoncontrollingInterestEquityCommonCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-31
Value14021397138413991393140414151420145914351423139013271311134113401406137814101430138614610
Percentage of RedeemableNoncontrollingInterestEquityCommonCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

mck:RedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value14021397138413991393140414151422145914351423139013271311134113401406
Percentage of RedeemableNoncontrollingInterestEquityCommonCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value80015009390
Percentage of RestrictedCashAndCashEquivalents100.00.00.0100.0100.00.0

us-gaap:RestructuringPlan

us-gaap:RestructuringAndRelatedCostCostIncurredToDate1

mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquarters



Period End2020-03-312019-12-312019-09-302019-06-30
Value77675341
Percentage of RestructuringAndRelatedCostCostIncurredToDate1100.0100.0100.0100.0

us-gaap:Range, us-gaap:RestructuringPlan

us-gaap:RestructuringAndRelatedCostExpectedCost1

srt:Maximum, mck:StrategicGrowthInitiativePlanAdditionalGlobalReorganizationandBusinessConsolidationPrograms



Period End2020-03-31
Value350
Percentage of RestructuringAndRelatedCostExpectedCost1100.0

srt:Minimum, mck:StrategicGrowthInitiativePlanAdditionalGlobalReorganizationandBusinessConsolidationPrograms



Period End2020-03-31
Value300
Percentage of RestructuringAndRelatedCostExpectedCost185.7

us-gaap:BalanceSheetLocation, us-gaap:RestructuringPlan

us-gaap:RestructuringReserve

us-gaap:AccruedLiabilities, mck:StrategicGrowthInitiativePlan



Period End2020-03-312019-03-31
Value99117
Percentage of RestructuringReserve100.0100.0

us-gaap:OtherNoncurrentLiabilities, mck:StrategicGrowthInitiativePlan



Period End2020-03-312019-03-312018-12-31
Value113331
Percentage of RestructuringReserve11.128.20.0

us-gaap:ConsolidationItems, us-gaap:RestructuringPlan

us-gaap:CorporateNonSegment, mck:StrategicGrowthInitiativePlan



Period End2020-03-312019-03-312018-12-312018-03-31
Value3937310
Percentage of RestructuringReserve39.431.60.00.0

us-gaap:ConsolidationItems, us-gaap:RestructuringPlan, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mck:StrategicGrowthInitiativePlan, mck:EuropeanPharmaceuticalSolutions



Period End2020-03-312019-03-312018-03-31
Value24380
Percentage of RestructuringReserve24.232.50.0

us-gaap:OperatingSegments, mck:StrategicGrowthInitiativePlan, mck:MedicalSurgicalSolutions



Period End2020-03-312019-03-312018-12-312018-03-31
Value181590
Percentage of RestructuringReserve18.212.80.00.0

us-gaap:OperatingSegments, mck:StrategicGrowthInitiativePlan, mck:U.S.PharmaceuticalandSpecialtySolutions



Period End2020-03-312019-03-312018-12-312018-03-31
Value223140
Percentage of RestructuringReserve22.226.50.00.0

us-gaap:OperatingSegments, mck:StrategicGrowthInitiativePlan, us-gaap:AllOtherSegments



Period End2020-03-312019-03-312018-12-312018-03-31
Value729360
Percentage of RestructuringReserve7.124.80.00.0

us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

mck:SeveranceandLeaseExitCosts, mck:Fiscal2018McKessonEuropePlan



Period End2020-03-312019-03-312018-03-31
Value41942
Percentage of RestructuringReserve4.016.20.0

us-gaap:RestructuringPlan

mck:OtherRestructuringPlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value4348486087
Percentage of RestructuringReserve43.40.00.00.074.4

mck:StrategicGrowthInitiativePlan



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-31
Value1101508058370
Percentage of RestructuringReserve111.1128.20.00.00.00.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

mck:RestrictedStockUnitsandPerformancebasedStockUnits



Period End2020-03-312019-03-31
Value32
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

mck:RestrictedStockUnitsandPerformancebasedStockUnits



Period End2020-03-312019-03-31
Value135.57142.77
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

us-gaap:EmployeeStock



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value2121212121212116
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:EmployeeStock



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value33344551
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PlanName

mck:A2013StockPlan



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value20252828293033
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant666.7833.3933.3700.0725.0600.0672.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value14369720153947326022626939433298
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value1222223345
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

mck:RangeOne



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value0112222113
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions0.050.050.0100.0100.0100.066.733.325.060.0

mck:RangeTwo



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value1000000.01000000.01000000.00.00.00.01000000.01000000.01000000.01000000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions100.050.050.00.00.00.033.333.325.020.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value2334456789
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

mck:RangeOne



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value1112343234
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions50.033.333.350.075.080.050.028.637.544.4

mck:RangeTwo



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-31
Value1222113111
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions50.066.766.750.025.020.050.014.312.511.1

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

mck:RangeOne



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value148.62119.65106.0593.1378.0168.853.7639.6736.52
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1100.0100.0100.0100.0100.0100.0100.0100.0100.0

mck:RangeTwo



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value199.88199.08199.13196.78180.24155.8784.8158.6446.36
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1134.5166.4187.8211.3231.0226.6157.8147.8126.9

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

mck:RangeOne



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value148.36133.54108.1795.7483.6279.3855.739.9538.09
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1100.0100.0100.0100.0100.0100.0100.0100.0100.0

mck:RangeTwo



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value198.25197.98190.18196.35206.58182.3896.3558.6445.99
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1133.6148.3175.8205.1247.0229.8173.0146.8120.7

us-gaap:ShareRepurchaseProgram

us-gaap:StockRepurchaseProgramAuthorizedAmount1

mck:AcceleratedShareRepurchase



Period End2020-03-312018-12-312018-03-31
Value600250500
Percentage of StockRepurchaseProgramAuthorizedAmount1100.0100.0100.0

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-12-312015-09-302015-03-312014-03-312013-03-312012-03-31
Value15353500110027461000160000340340299
Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-12-312010-03-312009-03-312008-03-31
Value5309638566928068828793899534964710057119721136211513112737852962394919008896088738939808591561052610765103188027798974087070764977157203683172207080753261936121
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-03-312015-03-31
Value-110-140-142-216-237-197-200-204-210-235-229-226-272
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-2.1-2.2-2.1-2.7-2.9-2.1-2.1-2.1-2.1-2.0-2.0-2.5-3.4

us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-03-312014-03-31
Value-1780-1570-1659-1564-1628-1657-1480-1492-1258-1318-1336-1606-1873-1323-1420168
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-33.5-24.6-24.8-19.4-19.6-17.6-15.5-15.5-12.5-11.0-11.8-13.9-16.6-14.7-17.61.6

us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-03-312014-03-31
Value49-37-59-61-61-36-20-17-31-12-21-11
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.9-0.4-0.6-0.6-0.6-0.3-0.2-0.1-0.3-0.1-0.3-0.1

us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-03-31
Value13851109275352-23-44-188-135-116-78-800
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest2.60.81.60.30.60.6-0.2-0.5-1.9-1.1-1.0-0.7-0.10.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value-1703-1663-1704-1778-1849-1826-1762-1801-1717-1726-1710-1936-2141-1561-1713-3-655876-179152
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-32.1-26.0-25.5-22.0-22.3-19.4-18.5-18.7-17.1-14.4-15.1-16.8-19.0-17.3-21.2-0.0-0.90.11.20.1-2.92.5

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value6663661465736483643563216411637261886028584569686552607855715339475644174252
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest125.5103.698.280.477.767.367.266.161.553.564.986.263.586.081.673.963.171.369.5

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value2333333333344444444
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.1

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-31
Value2172112101941932042082402531788484179600
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest4.13.33.12.42.32.22.22.52.51.60.91.017.40.00.0

us-gaap:OtherAdditionalCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value0-2-2-1-2-2-2-1-1-2-2-72314410-12-7-10
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.10.20.20.10.1-0.2-0.1-0.2

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value13022120751196512770124091327613354129321298613189836012705114531040294518250723661035586
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest245.3189.1178.8158.3149.7141.4140.1134.1129.1117.092.8157.1111.0147.1138.4114.396.198.591.3

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value-12892-10853-10353-9603-8902-8587-8678-8098-7655-5982-3721-9956-9507-9363-8204-6470-4458-4144-3860
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-242.8-170.0-154.7-119.0-107.4-91.5-91.0-83.9-76.1-53.1-41.3-123.1-92.1-132.4-120.1-89.6-59.2-66.9-63.1

us-gaap:TreasuryStockShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value110959286817980767368666462614646464215515315215115115115015015015014914414013913812612612511711188
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-04-012019-03-312018-12-312018-09-302018-06-302018-04-012018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value11095928681817980767373624615215014913811788
Percentage of TreasuryStockShares100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued



Period End2020-03-312019-03-312018-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-03-31
Value9168374543414977787575122161161179131
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value282297226285253174136136125140155164172
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesType

mck:OtherAllowances



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-312008-03-31
Value3024394241332315141624129
Percentage of ValuationAllowancesAndReservesBalance10.68.117.314.716.219.016.911.011.211.415.57.35.2

us-gaap:AllowanceForCreditLoss



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value252273187243212
Percentage of ValuationAllowancesAndReservesBalance89.491.982.785.383.8

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount



Period End2020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value1400110011001100110012001200
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

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


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical


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


us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical


us-gaap:Goodwill us-gaap:StatementBusinessSegments


us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass


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


us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType