0000927653FY2021falseP1YP3YP1YP1YP5YP1YP1Y00009276532020-04-012021-03-310000927653us-gaap:CommonStockMember2020-04-012021-03-310000927653mck:A0.625notesDue2021Member2020-04-012021-03-310000927653mck:A1.500NotesDue2025Member2020-04-012021-03-310000927653mck:A1.625NotesDue2026Member2020-04-012021-03-310000927653mck:A3.125NotesDue2029Member2020-04-012021-03-31iso4217:USD00009276532020-09-30xbrli:shares00009276532021-04-3000009276532019-04-012020-03-3100009276532018-04-012019-03-31iso4217:USDxbrli:shares00009276532021-03-3100009276532020-03-310000927653us-gaap:CommonStockMember2018-03-310000927653us-gaap:AdditionalPaidInCapitalMember2018-03-310000927653us-gaap:OtherAdditionalCapitalMember2018-03-310000927653us-gaap:RetainedEarningsMember2018-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-03-310000927653us-gaap:TreasuryStockMember2018-03-310000927653us-gaap:NoncontrollingInterestMember2018-03-3100009276532018-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2018-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2018-03-310000927653us-gaap:CommonStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:AdditionalPaidInCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:OtherAdditionalCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:TreasuryStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:NoncontrollingInterestMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2018-03-310000927653us-gaap:CommonStockMember2018-04-012019-03-310000927653us-gaap:AdditionalPaidInCapitalMember2018-04-012019-03-310000927653us-gaap:TreasuryStockMember2018-04-012019-03-310000927653us-gaap:NoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-04-012019-03-310000927653us-gaap:RetainedEarningsMember2018-04-012019-03-310000927653us-gaap:OtherAdditionalCapitalMember2018-04-012019-03-310000927653us-gaap:CommonStockMember2019-03-310000927653us-gaap:AdditionalPaidInCapitalMember2019-03-310000927653us-gaap:OtherAdditionalCapitalMember2019-03-310000927653us-gaap:RetainedEarningsMember2019-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-03-310000927653us-gaap:TreasuryStockMember2019-03-310000927653us-gaap:NoncontrollingInterestMember2019-03-3100009276532019-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-03-310000927653us-gaap:CommonStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:AdditionalPaidInCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:OtherAdditionalCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:TreasuryStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:NoncontrollingInterestMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-03-310000927653us-gaap:CommonStockMember2019-04-012020-03-310000927653us-gaap:AdditionalPaidInCapitalMember2019-04-012020-03-310000927653us-gaap:TreasuryStockMember2019-04-012020-03-310000927653us-gaap:NoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-04-012020-03-310000927653us-gaap:RetainedEarningsMember2019-04-012020-03-310000927653us-gaap:OtherAdditionalCapitalMember2019-04-012020-03-310000927653us-gaap:CommonStockMember2020-03-310000927653us-gaap:AdditionalPaidInCapitalMember2020-03-310000927653us-gaap:OtherAdditionalCapitalMember2020-03-310000927653us-gaap:RetainedEarningsMember2020-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-03-310000927653us-gaap:TreasuryStockMember2020-03-310000927653us-gaap:NoncontrollingInterestMember2020-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-03-310000927653us-gaap:CommonStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:AdditionalPaidInCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:OtherAdditionalCapitalMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:TreasuryStockMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:NoncontrollingInterestMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-03-310000927653us-gaap:CommonStockMember2020-04-012021-03-310000927653us-gaap:AdditionalPaidInCapitalMember2020-04-012021-03-310000927653us-gaap:TreasuryStockMember2020-04-012021-03-310000927653us-gaap:NoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-04-012021-03-310000927653us-gaap:RetainedEarningsMember2020-04-012021-03-310000927653us-gaap:CommonStockMember2021-03-310000927653us-gaap:AdditionalPaidInCapitalMember2021-03-310000927653us-gaap:OtherAdditionalCapitalMember2021-03-310000927653us-gaap:RetainedEarningsMember2021-03-310000927653us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-03-310000927653us-gaap:TreasuryStockMember2021-03-310000927653us-gaap:NoncontrollingInterestMember2021-03-31mck:segment00009276532020-07-012021-03-31mck:customer0000927653us-gaap:CustomerConcentrationRiskMemberus-gaap:SalesRevenueNetMember2020-04-012021-03-31xbrli:pure0000927653us-gaap:AccountsReceivableMemberus-gaap:CustomerConcentrationRiskMember2020-04-012021-03-310000927653mck:LargestCustomerMemberus-gaap:CustomerConcentrationRiskMemberus-gaap:SalesRevenueNetMember2020-04-012021-03-310000927653mck:LargestCustomerMemberus-gaap:AccountsReceivableMemberus-gaap:CustomerConcentrationRiskMember2020-04-012021-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2020-04-012021-03-310000927653us-gaap:ShippingAndHandlingMember2020-04-012021-03-310000927653us-gaap:ShippingAndHandlingMember2019-04-012020-03-310000927653us-gaap:ShippingAndHandlingMember2018-04-012019-03-310000927653srt:MinimumMemberus-gaap:BuildingAndBuildingImprovementsMember2020-04-012021-03-310000927653us-gaap:BuildingAndBuildingImprovementsMembersrt:MaximumMember2020-04-012021-03-310000927653mck:MachineryEquipmentAndOtherMembersrt:MinimumMember2020-04-012021-03-310000927653mck:MachineryEquipmentAndOtherMembersrt:MaximumMember2020-04-012021-03-310000927653srt:MinimumMember2020-04-012021-03-310000927653srt:MaximumMember2020-04-012021-03-310000927653mck:DistributionandRetailBusinessMemberus-gaap:ProductConcentrationRiskMemberus-gaap:SalesRevenueNetMember2020-04-012021-03-310000927653mck:DistributionandRetailBusinessMemberus-gaap:ProductConcentrationRiskMemberus-gaap:SalesRevenueNetMember2019-04-012020-03-310000927653us-gaap:ProductConcentrationRiskMembermck:ServicesBusinessMemberus-gaap:SalesRevenueNetMember2019-04-012020-03-310000927653us-gaap:ProductConcentrationRiskMembermck:ServicesBusinessMemberus-gaap:SalesRevenueNetMember2020-04-012021-03-310000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Member2020-04-010000927653us-gaap:CorporateJointVentureMember2017-03-310000927653us-gaap:CorporateJointVentureMembermck:ChangeHealthcareInc.Member2017-03-310000927653mck:ChangeHealthcareInc.Member2019-07-012019-07-010000927653mck:ChangeHealthcareLLCChangeHealthcareMembermck:ChangeHealthcareInc.Member2019-07-012019-07-010000927653us-gaap:IPOMembermck:ChangeHealthcareInc.Member2019-07-010000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2019-07-010000927653mck:ChangeHealthcareLLCChangeHealthcareMembermck:ChangeHealthcareInc.Member2019-07-010000927653us-gaap:CorporateJointVentureMember2019-07-012019-09-300000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2019-07-012019-09-300000927653mck:SeparationofChangeHealthcareJVMember2020-03-092020-03-090000927653mck:ChangeHealthcareLLCChangeHealthcareMember2020-03-092020-03-090000927653mck:SeparationofChangeHealthcareJVMember2020-03-100000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2020-01-012020-03-310000927653us-gaap:RetainedEarningsMemberus-gaap:AccountingStandardsUpdate201409Membersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMembermck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2019-04-010000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2019-04-012020-03-310000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:CorporateJointVentureMember2018-04-012019-03-310000927653mck:TransitionServicesAgreementsTSAMemberus-gaap:CorporateJointVentureMember2019-04-012020-03-310000927653mck:TransitionServicesAgreementsTSAMemberus-gaap:CorporateJointVentureMember2018-04-012019-03-310000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:AllOtherSegmentsMembermck:TaxReceivableAgreementTRAMember2018-04-012019-03-310000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:AllOtherSegmentsMembermck:TaxReceivableAgreementTRAMember2020-03-310000927653mck:ChangeHealthcareLLCChangeHealthcareMemberus-gaap:AllOtherSegmentsMembermck:TaxReceivableAgreementTRAMember2021-03-310000927653mck:TaxReceivableAgreementTRAMember2021-03-310000927653mck:TaxReceivableAgreementTRAMember2020-03-310000927653us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2021-03-310000927653us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2020-03-310000927653mck:WalgreensBootsAllianceJointVentureMember2020-11-010000927653mck:GermanWholesaleBusinessMember2020-11-010000927653mck:GermanPharmaceuticalWholesaleJointVentureMemberus-gaap:CorporateJointVentureMember2021-03-310000927653mck:GermanWholesaleBusinessMember2020-10-012020-12-310000927653mck:InternationalSegmentMembermck:GermanWholesaleBusinessMember2020-04-012021-03-310000927653mck:InternationalSegmentMembermck:GermanWholesaleBusinessMember2019-04-012020-03-310000927653mck:GermanWholesaleBusinessMemberus-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2020-11-010000927653mck:GermanWholesaleBusinessMemberus-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2020-03-310000927653mck:GermanWholesaleBusinessMemberus-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2019-12-122020-03-310000927653srt:MinimumMemberus-gaap:SubsequentEventMember2021-05-120000927653srt:MaximumMemberus-gaap:SubsequentEventMember2021-05-120000927653srt:MinimumMembercountry:GBmck:InternationalSegmentMember2021-03-310000927653srt:MaximumMembercountry:GBmck:InternationalSegmentMember2021-03-310000927653country:GBmck:InternationalSegmentMember2020-04-012021-03-310000927653mck:StrategicGrowthInitiativePlanAdditionalGlobalReorganizationandBusinessConsolidationProgramsMembermck:EmployeeSeveranceAcceleratedDepreciationandProjectConsultingFeesMember2020-04-012021-03-310000927653mck:StrategicGrowthInitiativePlanAdditionalGlobalReorganizationandBusinessConsolidationProgramsMembermck:EmployeeSeveranceAcceleratedDepreciationandProjectConsultingFeesMember2019-04-012020-03-310000927653mck:StrategicGrowthInitiativePlanAdditionalGlobalReorganizationandBusinessConsolidationProgramsMembermck:EmployeeSeveranceAcceleratedDepreciationandProjectConsultingFeesMember2018-04-012019-03-310000927653mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquartersMembermck:EmployeeRetentionExpensesAssetImpairmentsandAcceleratedDepreciationMember2020-04-012021-03-310000927653mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquartersMembermck:EmployeeRetentionExpensesAssetImpairmentsandAcceleratedDepreciationMember2019-04-012020-03-310000927653mck:StrategicGrowthInitiativePlanRelocationofCorporateHeadquartersMembermck:EmployeeRetentionExpensesAssetImpairmentsandAcceleratedDepreciationMember2018-04-012019-03-310000927653mck:OperatingModelAndCostOptimizationProgramsMembermck:EmployeeSeveranceExitrelatedCostsandAssetImpairmentChargesMember2018-04-012019-03-310000927653mck:OperatingModelAndCostOptimizationProgramsMembermck:EmployeeSeveranceExitrelatedCostsandAssetImpairmentChargesMember2019-03-310000927653mck:EmployeeSeveranceExitrelatedCostsandAssetImpairmentChargesMember2019-04-012020-03-310000927653mck:EmployeeSeveranceExitrelatedCostsandAssetImpairmentChargesMember2018-04-012019-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2020-04-012021-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2020-04-012021-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2020-04-012021-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2020-04-012021-03-310000927653us-gaap:CorporateNonSegmentMember2020-04-012021-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2019-04-012020-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2019-04-012020-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2019-04-012020-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2019-04-012020-03-310000927653us-gaap:CorporateNonSegmentMember2019-04-012020-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2018-04-012019-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2018-04-012019-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2018-04-012019-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2018-04-012019-03-310000927653us-gaap:CorporateNonSegmentMember2018-04-012019-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2019-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2019-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2019-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2019-03-310000927653us-gaap:CorporateNonSegmentMember2019-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2020-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2020-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2020-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2020-03-310000927653us-gaap:CorporateNonSegmentMember2020-03-310000927653us-gaap:OperatingSegmentsMembermck:USPharmaceuticalSegmentMember2021-03-310000927653us-gaap:OperatingSegmentsMembermck:InternationalSegmentMember2021-03-310000927653mck:MedicalSurgicalSolutionsSegmentMemberus-gaap:OperatingSegmentsMember2021-03-310000927653us-gaap:OperatingSegmentsMembermck:PrescriptionTechnologySolutionsSegmentMember2021-03-310000927653us-gaap:CorporateNonSegmentMember2021-03-310000927653us-gaap:AccruedLiabilitiesMember2020-03-310000927653us-gaap:OtherNoncurrentLiabilitiesMember2020-03-310000927653us-gaap:AccruedLiabilitiesMember2021-03-310000927653us-gaap:OtherNoncurrentLiabilitiesMember2021-03-310000927653mck:InternationalSegmentMember2020-04-012021-03-310000927653mck:InternationalSegmentMembermck:RetailPharmacyReportingUnitMember2019-04-012020-03-310000927653mck:InternationalSegmentMembermck:RexallHealthMember2019-04-012020-03-310000927653mck:InternationalSegmentMembermck:RetailPharmacyReportingUnitMember2018-04-012019-03-310000927653us-gaap:CustomerRelationshipsMembermck:IntangibleAssetandStoreAssetsImpairmentMembermck:RexallHealthMember2018-04-012019-03-310000927653mck:MedicalSpecialtiesDistributorsLLCMSDMember2018-06-012018-06-010000927653mck:MedicalSpecialtiesDistributorsLLCMSDMember2019-05-310000927653mck:MedicalSpecialtiesDistributorsLLCMSDMember2018-06-012019-05-310000927653mck:CoverMyMedsLLCMember2017-04-032017-04-030000927653mck:CoverMyMedsLLCMember2017-04-030000927653mck:CoverMyMedsLLCMember2019-05-012019-05-310000927653mck:CoverMyMedsLLCMember2018-05-012018-05-310000927653mck:CoverMyMedsLLCMember2020-03-310000927653us-gaap:RestrictedStockUnitsRSUMember2020-04-012021-03-310000927653us-gaap:RestrictedStockUnitsRSUMember2019-04-012020-03-310000927653us-gaap:RestrictedStockUnitsRSUMember2018-04-012019-03-310000927653us-gaap:StockOptionMember2020-04-012021-03-310000927653us-gaap:StockOptionMember2019-04-012020-03-310000927653us-gaap:StockOptionMember2018-04-012019-03-310000927653us-gaap:EmployeeStockMember2020-04-012021-03-310000927653us-gaap:EmployeeStockMember2019-04-012020-03-310000927653us-gaap:EmployeeStockMember2018-04-012019-03-310000927653mck:A2013StockPlanMember2013-07-310000927653mck:A2013StockPlanMember2021-03-310000927653srt:MinimumMemberus-gaap:RestrictedStockUnitsRSUMember2020-04-012021-03-310000927653srt:MaximumMemberus-gaap:RestrictedStockUnitsRSUMember2020-04-012021-03-310000927653us-gaap:RestrictedStockUnitsRSUMembersrt:DirectorMember2021-03-310000927653mck:PerformancebasedStockUnitsMember2020-04-012021-03-310000927653mck:PeRSUsMember2020-04-012021-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2020-04-012021-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2019-04-012020-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2018-04-012019-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2020-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2021-03-310000927653mck:RestrictedStockUnitsandPerformancebasedStockUnitsMember2019-03-310000927653us-gaap:EmployeeStockOptionMember2020-04-012021-03-310000927653us-gaap:EmployeeStockOptionMember2018-04-012019-03-310000927653mck:RangeOneMember2020-04-012021-03-310000927653mck:RangeOneMember2021-03-310000927653mck:RangeTwoMember2020-04-012021-03-310000927653mck:RangeTwoMember2021-03-310000927653us-gaap:EmployeeStockOptionMember2019-04-012020-03-310000927653us-gaap:EmployeeStockOptionMember2021-03-310000927653us-gaap:EmployeeStockOptionMember2020-03-310000927653us-gaap:EmployeeStockOptionMember2019-03-310000927653us-gaap:EmployeeStockMember2021-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMembermck:TerminationofU.SDefinedBenefitPensionPlanMember2019-04-012020-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMembersrt:ExecutiveOfficerMembermck:SettlementofExecutiveRetirementBenefitsMember2019-04-012020-03-310000927653mck:PendingAndFutureOpioidRelatedClaimsMember2020-04-012021-03-310000927653mck:InternationalSegmentMember2019-04-012020-03-310000927653mck:InternationalSegmentMember2018-04-012019-03-310000927653us-gaap:DomesticCountryMember2021-03-310000927653us-gaap:StateAndLocalJurisdictionMember2021-03-310000927653us-gaap:ForeignCountryMember2021-03-310000927653us-gaap:ForeignCountryMemberus-gaap:CapitalLossCarryforwardMember2021-03-31iso4217:EURxbrli:shares0000927653mck:MckessonEuropeSubsidiaryMemberus-gaap:SubsequentEventMember2021-04-120000927653mck:MckessonEuropeSubsidiaryMember2021-03-310000927653mck:MckessonEuropeSubsidiaryMember2020-04-012021-03-310000927653mck:MckessonEuropeSubsidiaryMember2019-04-012020-03-310000927653mck:MckessonEuropeSubsidiaryMember2018-04-012019-03-310000927653mck:MckessonEuropeSubsidiaryMemberus-gaap:SubsequentEventMember2021-04-120000927653mck:MckessonEuropeSubsidiaryMember2021-03-310000927653mck:MckessonEuropeSubsidiaryMember2020-03-310000927653mck:MckessonEuropeSubsidiaryMember2018-09-192018-09-190000927653mck:MckessonEuropeSubsidiaryMember2018-09-190000927653mck:VantageandClarusOneSourcingServicesLLCMember2020-04-012021-03-310000927653mck:VantageandClarusOneSourcingServicesLLCMember2019-04-012020-03-310000927653mck:VantageandClarusOneSourcingServicesLLCMember2018-04-012019-03-310000927653mck:RedeemableNoncontrollingInterestMember2018-03-310000927653mck:RedeemableNoncontrollingInterestMember2018-04-012019-03-310000927653mck:RedeemableNoncontrollingInterestMember2019-03-310000927653mck:RedeemableNoncontrollingInterestMember2019-04-012020-03-310000927653mck:RedeemableNoncontrollingInterestMember2020-03-310000927653mck:RedeemableNoncontrollingInterestMember2020-04-012021-03-310000927653mck:RedeemableNoncontrollingInterestMember2021-03-3100009276532019-04-010000927653us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-04-010000927653srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-04-012019-04-010000927653srt:MinimumMemberus-gaap:BuildingMember2021-03-310000927653srt:MaximumMemberus-gaap:BuildingMember2021-03-310000927653srt:MinimumMemberus-gaap:EquipmentMember2021-03-310000927653srt:MaximumMemberus-gaap:EquipmentMember2021-03-310000927653mck:RealPropertyMember2021-03-310000927653srt:MinimumMember2021-03-310000927653srt:MaximumMember2021-03-310000927653mck:USPharmaceuticalSegmentMember2019-03-310000927653mck:InternationalSegmentMember2019-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2019-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2019-03-310000927653mck:USPharmaceuticalSegmentMember2019-04-012020-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2019-04-012020-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2019-04-012020-03-310000927653mck:USPharmaceuticalSegmentMember2020-03-310000927653mck:InternationalSegmentMember2020-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2020-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2020-03-310000927653mck:USPharmaceuticalSegmentMember2020-04-012021-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2020-04-012021-03-310000927653mck:USPharmaceuticalSegmentMember2021-03-310000927653mck:InternationalSegmentMember2021-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2021-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2021-03-3100009276532020-07-012020-09-300000927653mck:InternationalSegmentMembermck:RetailPharmacyReportingUnitMember2020-04-012021-03-310000927653mck:InternationalSegmentMembersrt:EuropeMember2021-03-310000927653mck:InternationalSegmentMembermck:PharmaceuticalDistributionsReportingUnitJune2018OneMember2018-04-012018-06-300000927653mck:InternationalSegmentMembermck:RetailPharmacyReportingUnitMember2018-04-012018-06-300000927653mck:PharmaceuticalDistributionsReportingUnitJune2018TwoMembermck:InternationalSegmentMember2018-04-012018-06-300000927653mck:InternationalSegmentMembermck:RetailPharmacyReportingUnitMember2019-01-012019-03-310000927653mck:InternationalSegmentMembermck:PharmaceuticalDistributionsReportingUnitMember2019-01-012019-03-310000927653mck:InternationalSegmentMembermck:RexallHealthMember2018-10-012018-12-31mck:reportingUnit0000927653mck:EuropeanPharmaceuticalSolutionsMember2018-04-012018-06-300000927653us-gaap:CustomerRelationshipsMember2020-04-012021-03-310000927653us-gaap:CustomerRelationshipsMember2021-03-310000927653us-gaap:CustomerRelationshipsMember2020-03-310000927653us-gaap:ServiceAgreementsMember2020-04-012021-03-310000927653us-gaap:ServiceAgreementsMember2021-03-310000927653us-gaap:ServiceAgreementsMember2020-03-310000927653us-gaap:LicensingAgreementsMember2020-04-012021-03-310000927653us-gaap:LicensingAgreementsMember2021-03-310000927653us-gaap:LicensingAgreementsMember2020-03-310000927653us-gaap:TrademarksAndTradeNamesMember2020-04-012021-03-310000927653us-gaap:TrademarksAndTradeNamesMember2021-03-310000927653us-gaap:TrademarksAndTradeNamesMember2020-03-310000927653us-gaap:TechnologyBasedIntangibleAssetsMember2020-04-012021-03-310000927653us-gaap:TechnologyBasedIntangibleAssetsMember2021-03-310000927653us-gaap:TechnologyBasedIntangibleAssetsMember2020-03-310000927653us-gaap:OtherIntangibleAssetsMember2020-04-012021-03-310000927653us-gaap:OtherIntangibleAssetsMember2021-03-310000927653us-gaap:OtherIntangibleAssetsMember2020-03-310000927653mck:NotesDueNovember302020Memberus-gaap:LoansPayableMember2021-03-310000927653mck:NotesDueNovember302020Memberus-gaap:LoansPayableMember2020-03-310000927653us-gaap:LoansPayableMembermck:FourPointSevenFivePercentNotesDuesMarchOneTwoThousandTwentyOneMember2021-03-310000927653us-gaap:LoansPayableMembermck:FourPointSevenFivePercentNotesDuesMarchOneTwoThousandTwentyOneMember2020-03-310000927653mck:TwoPointSevenZeroPercentNotesDueDecemberFifteenTwoThousandTwentyTwoMemberus-gaap:LoansPayableMember2021-03-310000927653mck:TwoPointSevenZeroPercentNotesDueDecemberFifteenTwoThousandTwentyTwoMemberus-gaap:LoansPayableMember2020-03-310000927653mck:TwoPointEightFivePercentNotesDueMarchFifteenTwoThousandTwentyThreeMemberus-gaap:LoansPayableMember2021-03-310000927653mck:TwoPointEightFivePercentNotesDueMarchFifteenTwoThousandTwentyThreeMemberus-gaap:LoansPayableMember2020-03-310000927653mck:ThreePointEightZeroPercentNotesDueMarchFifteenthTwoThousandTwentyFourMemberus-gaap:LoansPayableMember2021-03-310000927653mck:ThreePointEightZeroPercentNotesDueMarchFifteenthTwoThousandTwentyFourMemberus-gaap:LoansPayableMember2020-03-310000927653us-gaap:LoansPayableMembermck:A090NotesDueDecember32025Member2021-03-310000927653us-gaap:LoansPayableMembermck:A090NotesDueDecember32025Member2020-03-310000927653mck:SevenPointSixFivePercentDebenturesDueMarchOneTwoThousandTwentySevenMemberus-gaap:LoansPayableMember2021-03-310000927653mck:SevenPointSixFivePercentDebenturesDueMarchOneTwoThousandTwentySevenMemberus-gaap:LoansPayableMember2020-03-310000927653mck:ThreePointNineFivePercentNotesDueFebruarySixteenthTwoThousandTwentyEightMemberus-gaap:LoansPayableMember2021-03-310000927653mck:ThreePointNineFivePercentNotesDueFebruarySixteenthTwoThousandTwentyEightMemberus-gaap:LoansPayableMember2020-03-310000927653mck:NotesDueMay302029Memberus-gaap:LoansPayableMember2021-03-310000927653mck:NotesDueMay302029Memberus-gaap:LoansPayableMember2020-03-310000927653mck:SixPercentNotesDueMarchOneTwoThousandFortyOneMemberus-gaap:LoansPayableMember2021-03-310000927653mck:SixPercentNotesDueMarchOneTwoThousandFortyOneMemberus-gaap:LoansPayableMember2020-03-310000927653us-gaap:LoansPayableMembermck:FourPointEightEightPercentNotesDueMarchFifteenthTwoThousandFortyFourMember2021-03-310000927653us-gaap:LoansPayableMembermck:FourPointEightEightPercentNotesDueMarchFifteenthTwoThousandFortyFourMember2020-03-310000927653mck:ZeroPointSixThreePercentEuroNotesDueAugustTwoThousandTwentyOneMemberus-gaap:LoansPayableMember2021-03-310000927653mck:ZeroPointSixThreePercentEuroNotesDueAugustTwoThousandTwentyOneMemberus-gaap:LoansPayableMember2020-03-310000927653mck:OnePointFiveZeroPercentEuroNotesDueNovemberTwoThousandTwentyFiveMemberus-gaap:LoansPayableMember2021-03-310000927653mck:OnePointFiveZeroPercentEuroNotesDueNovemberTwoThousandTwentyFiveMemberus-gaap:LoansPayableMember2020-03-310000927653us-gaap:LoansPayableMembermck:OnePointSixThreePercentEuroNotesDueOctoberTwoThousandTwentySixMember2021-03-310000927653us-gaap:LoansPayableMembermck:OnePointSixThreePercentEuroNotesDueOctoberTwoThousandTwentySixMember2020-03-310000927653us-gaap:LoansPayableMembermck:ThreePointOneThreePercentSterlingNotesDueFebruaryTwoThousandTwentyNineMember2021-03-310000927653us-gaap:LoansPayableMembermck:ThreePointOneThreePercentSterlingNotesDueFebruaryTwoThousandTwentyNineMember2020-03-310000927653mck:LeaseandOtherObligationsMember2021-03-310000927653mck:LeaseandOtherObligationsMember2020-03-310000927653mck:LongtermDebtCurrentMaturitiesMember2021-03-310000927653mck:LongtermDebtCurrentMaturitiesMember2020-03-310000927653us-gaap:LoansPayableMembermck:A090NotesDueDecember32025Member2020-12-030000927653us-gaap:LoansPayableMembermck:A090NotesDueDecember32025Member2020-12-032020-12-030000927653mck:NotesDueNovember302020Memberus-gaap:LoansPayableMember2020-11-300000927653mck:A475NotesDueMarch12021Memberus-gaap:LoansPayableMember2020-12-01iso4217:EUR0000927653mck:FloatingRateEuroNotesDueFebruaryTwelveTwoThousandandTwentyMemberus-gaap:LoansPayableMember2019-04-012020-03-310000927653us-gaap:LoansPayableMembermck:TwoPointTwoEightNotesDueMarchFifteenthTwoThousandNineteenMember2019-03-152019-03-150000927653us-gaap:LoansPayableMembermck:TwoPointTwoEightNotesDueMarchFifteenthTwoThousandNineteenMember2019-03-150000927653us-gaap:NotesPayableOtherPayablesMember2020-04-012021-03-310000927653us-gaap:UnsecuredDebtMemberus-gaap:RevolvingCreditFacilityMembermck:SeniorUnsecuredCreditFacilitythe2020CreditFacilityMember2019-09-300000927653us-gaap:UnsecuredDebtMemberus-gaap:RevolvingCreditFacilityMembermck:SeniorUnsecuredCreditFacilitythe2020CreditFacilityMember2019-09-012019-09-300000927653mck:SeniorUnsecuredCreditFacilitythe2020CreditFacilityCanadianDollarBritishPoundSterlingandEurosSublimitMemberus-gaap:UnsecuredDebtMemberus-gaap:RevolvingCreditFacilityMember2019-09-300000927653us-gaap:UnsecuredDebtMemberus-gaap:RevolvingCreditFacilityMembermck:SeniorUnsecuredCreditFacilitythe2020CreditFacilityMember2020-04-012021-03-310000927653us-gaap:UnsecuredDebtMemberus-gaap:RevolvingCreditFacilityMembermck:SeniorUnsecuredCreditFacilitythe2020CreditFacilityMember2021-03-310000927653mck:GlobalFacilityMember2019-09-300000927653mck:GlobalFacilityMember2019-09-012019-09-300000927653mck:GlobalFacilityMember2019-04-012019-09-300000927653us-gaap:LineOfCreditMember2021-03-310000927653us-gaap:CommercialPaperMember2021-03-310000927653us-gaap:CommercialPaperMember2020-03-310000927653us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-03-310000927653us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-03-31mck:participant0000927653country:USus-gaap:PensionPlansDefinedBenefitMember2019-06-012019-06-300000927653country:USus-gaap:PensionPlansDefinedBenefitMember2019-04-012019-06-300000927653country:USus-gaap:PensionPlansDefinedBenefitMember2019-07-012019-09-300000927653country:USus-gaap:PensionPlansDefinedBenefitMember2021-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2019-10-012019-12-310000927653country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2020-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2019-03-310000927653mck:GermanWholesaleBusinessMemberus-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2020-12-310000927653mck:GermanWholesaleBusinessMemberus-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember2020-10-012020-12-310000927653country:USus-gaap:PensionPlansDefinedBenefitMember2020-04-012021-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMember2019-04-012020-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMember2018-04-012019-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-04-012021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2019-04-012020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2018-04-012019-03-310000927653us-gaap:PensionPlansDefinedBenefitMember2021-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMember2020-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMember2019-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2019-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-03-310000927653country:USmck:GermanWholesaleBusinessMemberus-gaap:PensionPlansDefinedBenefitMember2020-03-310000927653country:USmck:GermanWholesaleBusinessMemberus-gaap:PensionPlansDefinedBenefitMember2020-10-012020-12-310000927653country:USmck:TerminationofU.SDefinedBenefitPensionPlanandSettlementofRetirementBenefitsMemberus-gaap:PensionPlansDefinedBenefitMember2019-04-012020-03-310000927653country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:UnfundedPlanMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:USTreasuryAndGovernmentMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FixedIncomeFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Membermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Membermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:MutualFundMemberus-gaap:PensionPlansDefinedBenefitMember2020-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMembermck:DefinedBenefitPlanOtherFundsMemberus-gaap:PensionPlansDefinedBenefitMember2020-03-310000927653us-gaap:PensionPlansDefinedBenefitMember2020-04-012021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMembermck:NorwegianPublicServicePensionFundSPKMember2021-03-310000927653us-gaap:ForeignPlanMemberus-gaap:PensionPlansDefinedBenefitMembermck:NorwegianPublicServicePensionFundSPKMember2020-03-310000927653mck:FirstPartOfPayContributionMember2020-04-012021-03-310000927653mck:SecondPartOfPayContributionMember2020-04-012021-03-310000927653us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-03-310000927653us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-03-310000927653us-gaap:LoansPayableMembermck:EuroDenominatedNotesMemberus-gaap:NetInvestmentHedgingMember2020-03-310000927653us-gaap:LoansPayableMembermck:EuroDenominatedNotesMemberus-gaap:NetInvestmentHedgingMember2021-03-310000927653us-gaap:LoansPayableMembermck:EuroDenominatedNotesMember2019-12-31iso4217:GBP0000927653us-gaap:LoansPayableMembermck:BritishPoundSterlingDenominatedNotesMember2019-03-310000927653us-gaap:LoansPayableMembermck:BritishPoundSterlingDenominatedNotesMember2019-09-30iso4217:CAD0000927653us-gaap:DesignatedAsHedgingInstrumentMembermck:November2018CrossCurrencySwapsMemberus-gaap:NetInvestmentHedgingMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMembermck:November2018CrossCurrencySwapsMemberus-gaap:NetInvestmentHedgingMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMembermck:November2018CrossCurrencySwapsMemberus-gaap:NetInvestmentHedgingMember2019-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMembermck:November2018CrossCurrencySwapsMemberus-gaap:NetInvestmentHedgingMember2019-04-012020-03-310000927653us-gaap:NetInvestmentHedgingMember2020-04-012021-03-310000927653us-gaap:NetInvestmentHedgingMember2019-04-012020-03-310000927653us-gaap:NetInvestmentHedgingMember2018-04-012019-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CashFlowHedgingMemberus-gaap:InterestRateSwapMember2020-04-270000927653mck:ForwardContractsandCrossCurrencySwapsMember2020-04-012021-03-310000927653mck:ForwardContractsandCrossCurrencySwapsMember2019-04-012020-03-310000927653mck:ForwardContractsandCrossCurrencySwapsMember2018-04-012019-03-310000927653us-gaap:NondesignatedMembercurrency:GBPus-gaap:ForeignExchangeContractMember2021-03-310000927653us-gaap:NondesignatedMembercurrency:GBPus-gaap:ForeignExchangeContractMember2020-03-310000927653mck:ForwardContractstoOffsetImpactofIneffectivenessofNetinvestmentHedgesMemberus-gaap:NondesignatedMember2020-12-310000927653mck:ForwardContractstoOffsetImpactofIneffectivenessofNetinvestmentHedgesMemberus-gaap:NondesignatedMember2019-04-012020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:CurrencySwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherCurrentLiabilitiesMemberus-gaap:CurrencySwapMember2021-03-310000927653mck:PrepaidExpensesandOtherAssetsOtherAccruedLiabilitiesMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:CurrencySwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherCurrentLiabilitiesMemberus-gaap:CurrencySwapMember2020-03-310000927653mck:PrepaidExpensesandOtherAssetsOtherAccruedLiabilitiesMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherNoncurrentAssetsMemberus-gaap:CurrencySwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CurrencySwapMember2021-03-310000927653mck:OtherNoncurrentAssetsLiabilitiesMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherNoncurrentAssetsMemberus-gaap:CurrencySwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CurrencySwapMember2020-03-310000927653mck:OtherNoncurrentAssetsLiabilitiesMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:CurrencySwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherCurrentLiabilitiesMemberus-gaap:InterestRateSwapMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherCurrentLiabilitiesMemberus-gaap:InterestRateSwapMember2020-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMember2021-03-310000927653us-gaap:DesignatedAsHedgingInstrumentMember2020-03-310000927653us-gaap:NondesignatedMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMember2021-03-310000927653us-gaap:NondesignatedMemberus-gaap:PrepaidExpensesAndOtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMember2020-03-310000927653us-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberus-gaap:OtherCurrentLiabilitiesMember2021-03-310000927653us-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberus-gaap:OtherCurrentLiabilitiesMember2020-03-310000927653us-gaap:NondesignatedMember2021-03-310000927653us-gaap:NondesignatedMember2020-03-3100009276532021-01-012021-03-310000927653us-gaap:FairValueMeasurementsNonrecurringMember2020-03-310000927653us-gaap:FairValueMeasurementsNonrecurringMember2021-03-310000927653us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-03-310000927653us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-03-310000927653us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-03-310000927653us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-03-310000927653srt:MinimumMembermck:GuaranteeObligationsInventoryRepurchaseGuaranteesMember2020-04-012021-03-310000927653srt:MaximumMembermck:GuaranteeObligationsInventoryRepurchaseGuaranteesMember2020-04-012021-03-310000927653srt:MinimumMembermck:GuaranteeObligationsCustomersDebtMember2020-04-012021-03-310000927653srt:MaximumMembermck:GuaranteeObligationsCustomersDebtMember2020-04-012021-03-310000927653mck:GuaranteeObligationsInventoryRepurchaseGuaranteesMember2021-03-310000927653mck:GuaranteeObligationsCustomersDebtMember2021-03-310000927653us-gaap:StandbyLettersOfCreditMember2021-03-31mck:case0000927653mck:InreNationalPrescriptionOpiateLitigationMember2021-03-310000927653us-gaap:PendingLitigationMembermck:InreNationalPrescriptionOpiateLitigationMember2020-01-130000927653mck:InvestigationintoFactorsContributingtoIncreaseinOpioidrelatedHospitalizationsandDeathsMember2021-03-31mck:state0000927653mck:InvestigationintoFactorsContributingtoIncreaseinOpioidrelatedHospitalizationsandDeathsMember2017-12-052021-03-310000927653mck:InvestigationintoFactorsContributingtoIncreaseinOpioidrelatedHospitalizationsandDeathsMembercountry:CA2021-03-31mck:stateAttorneymck:countymck:company0000927653mck:ThreeLargestU.S.PharmaceuticalDistributorsMemberus-gaap:PendingLitigationMembermck:InreNationalPrescriptionOpiateLitigationMember2021-03-310000927653mck:ThreeLargestU.S.PharmaceuticalDistributorsMemberus-gaap:PendingLitigationMembermck:InreNationalPrescriptionOpiateLitigationMember2019-10-212021-03-310000927653us-gaap:PendingLitigationMembermck:InreNationalPrescriptionOpiateLitigationMember2019-10-212021-03-310000927653us-gaap:PendingLitigationMembermck:InreNationalPrescriptionOpiateLitigationMember2021-03-310000927653mck:NationalPrescriptionOpiateLitigationMember2020-04-012021-03-310000927653mck:UnitedStatesexrel.Manchesterv.PurduePharmaL.P.etalMember2019-02-252019-02-25mck:complaint0000927653mck:UnitedStatesofAmericaexrel.CarlKelleyandMichaelMcElligott19cv2233andStateofCaliforniaexrel.CarlKelleyandMichaelMcElligottCGC19576931Member2019-12-31mck:relator0000927653mck:UnitedStatesofAmericaexrel.CarlKelleyandMichaelMcElligott19cv2233andStateofCaliforniaexrel.CarlKelleyandMichaelMcElligottCGC19576931Member2019-12-012019-12-310000927653mck:InsuranceCoverageLitigationMember2020-10-230000927653srt:MinimumMembermck:TrueHealthChiropracticInc.etal.v.McKessonCorporationetalMember2013-05-172013-05-170000927653srt:MaximumMembermck:TrueHealthChiropracticInc.etal.v.McKessonCorporationetalMember2013-05-172013-05-17mck:fax_number0000927653mck:TrueHealthChiropracticInc.etal.v.McKessonCorporationetalMember2019-08-13mck:faxmck:investmentFund0000927653mck:PolygonEuropeanEquityOpportunityMasterFundetal.v.McKessonEuropeHoldingsGmbHCo.KGaAMember2017-12-292017-12-290000927653mck:DavidsonKempnerInternationalBVILtd.etal.v.McKessonEuropeHoldingsGmbHCo.KGaAMember2017-12-302017-12-300000927653mck:UnitedStatesexrel.Piacentilev.AmgenInc.etal.Member2013-04-162013-04-16mck:defendant0000927653mck:UnitedStatesexrel.OmniHealthcareInc.v.McKessonCorporationetal.Member2018-04-032018-04-03mck:city0000927653mck:UnitedStatesexrel.OmniHealthcareInc.v.McKessonCorporationetal.Member2018-04-03mck:officer0000927653mck:EvanstonPolicePensionFundv.McKessonCorporationMember2018-12-120000927653mck:PowellPrescriptionCenteretal.v.SurescriptsLLCetal.andIntergratedPharmaceuticalSolutionsLLCv.SurescriptsLLCMember2019-10-310000927653mck:KennebunkVillagePharmacyInc.v.SureScriptsLLCetal.119cv7445Whitmanv.SureScriptsLLCetal.No.119cv7448BBKGlobalCorp.v.SureScriptsLLCetal.119cv7640Member2019-11-300000927653mck:ConsolidatedActionsvSureScriptsLLCMember2019-12-310000927653mck:UnitedStatesExRelHartVMcKessonCorporationEtAl15Cv00903RAMember2020-07-012020-07-310000927653mck:CivilInvestigativeDemandsbytheU.S.AttorneysOfficefortheEasternDistrictofNewYorkMember2018-08-31mck:softwareProduct0000927653mck:NewYorkOpioidTaxSurchargeMembermck:USPharmaceuticalSegmentMember2020-04-012021-03-310000927653mck:NewYorkOpioidTaxSurchargeMember2020-04-012021-03-31mck:site0000927653mck:EnvironmentalLitigationMember2021-03-310000927653srt:MinimumMembermck:EnvironmentalLitigationMember2020-04-012021-03-310000927653srt:MaximumMembermck:EnvironmentalLitigationMember2020-04-012021-03-310000927653mck:EnvironmentalLitigationMember2020-04-012021-03-31mck:vote00009276532020-04-012020-06-3000009276532020-07-012020-07-3100009276532018-05-310000927653mck:OpenMarketTransactionsMember2018-04-012019-03-310000927653mck:AcceleratedShareRepurchaseMember2018-04-012019-03-310000927653mck:OpenMarketTransactionsMember2019-04-012020-03-310000927653mck:AcceleratedShareRepurchaseMember2019-04-012020-03-3100009276532021-01-310000927653mck:OpenMarketTransactionsMember2020-04-012021-03-310000927653us-gaap:OtherCurrentLiabilitiesMember2021-03-3100009276532020-03-092020-03-090000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2018-04-012019-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceandNetGainLossIncludingPortionAttributabletoNoncontrollingInterestMember2020-04-012021-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceandNetGainLossIncludingPortionAttributabletoNoncontrollingInterestMember2019-04-012020-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceandNetGainLossIncludingPortionAttributabletoNoncontrollingInterestMember2018-04-012019-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentAmortizationofActuarialLossPriorServiceCostandTransitionObligationIncludingPortionAttributabletoNoncontrollingInterestMember2020-04-012021-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentAmortizationofActuarialLossPriorServiceCostandTransitionObligationIncludingPortionAttributabletoNoncontrollingInterestMember2019-04-012020-03-310000927653mck:AccumulatedDefinedBenefitPlansAdjustmentAmortizationofActuarialLossPriorServiceCostandTransitionObligationIncludingPortionAttributabletoNoncontrollingInterestMember2018-04-012019-03-310000927653mck:AccumulatedDefinedBenefitPlansForeignCurrencyAdjustmentIncludingPortionAttributabletoNoncontrollingInterestMember2020-04-012021-03-310000927653mck:AccumulatedDefinedBenefitPlansForeignCurrencyAdjustmentIncludingPortionAttributabletoNoncontrollingInterestMember2019-04-012020-03-310000927653mck:AccumulatedDefinedBenefitPlansForeignCurrencyAdjustmentIncludingPortionAttributabletoNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember2020-04-012021-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember2019-04-012020-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember2018-04-012019-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2019-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2019-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2019-04-012020-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2020-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2020-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2020-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2020-04-012021-03-310000927653us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-03-310000927653us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-03-310000927653us-gaap:AccumulatedNetGainLossFromCashFlowHedgesIncludingPortionAttributableToNoncontrollingInterestMember2021-03-310000927653us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2021-03-310000927653mck:CaliforniaFoundationMemberus-gaap:OtherCurrentLiabilitiesMember2019-03-310000927653mck:McKessonFoundationMember2020-01-012020-03-310000927653us-gaap:InvesteeMember2020-04-012021-03-310000927653us-gaap:InvesteeMember2019-04-012020-03-310000927653us-gaap:InvesteeMember2018-04-012019-03-310000927653mck:U.S.PharmaceuticalandSpecialtySolutionsMemberus-gaap:InvesteeMember2020-04-012021-03-310000927653mck:U.S.PharmaceuticalandSpecialtySolutionsMemberus-gaap:InvesteeMember2019-04-012020-03-310000927653mck:U.S.PharmaceuticalandSpecialtySolutionsMemberus-gaap:InvesteeMember2018-04-012019-03-31mck:countrymck:numberOfProducts0000927653mck:USPharmaceuticalSegmentMember2018-04-012019-03-310000927653mck:MedicalSurgicalSolutionsSegmentMember2018-04-012019-03-310000927653mck:PrescriptionTechnologySolutionsSegmentMember2018-04-012019-03-310000927653us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembermck:InternationalSegmentMembermck:GermanWholesaleBusinessMember2020-04-012021-03-310000927653mck:RexallHealthMembermck:InternationalSegmentMembercountry:CAmck:ThirdPartySellerofRexallHealthMember2018-04-012019-03-310000927653mck:ShareholderDerivativeActionMember2020-04-012021-03-310000927653mck:ForTwoCountiesInreNationalPrescriptionOpiateLitigationMember2019-04-012020-03-310000927653country:US2021-03-310000927653country:US2020-03-310000927653us-gaap:NonUsMember2021-03-310000927653us-gaap:NonUsMember2020-03-3100009276532020-10-012020-12-3100009276532019-04-012019-06-3000009276532019-07-012019-09-3000009276532019-10-012019-12-3100009276532020-01-012020-03-310000927653us-gaap:AllowanceForCreditLossMember2020-03-310000927653us-gaap:AllowanceForCreditLossMember2020-04-012021-03-310000927653us-gaap:AllowanceForCreditLossMember2021-03-310000927653mck:OtherAllowancesMember2020-03-310000927653mck:OtherAllowancesMember2020-04-012021-03-310000927653mck:OtherAllowancesMember2021-03-310000927653us-gaap:AllowanceForCreditLossMember2019-03-310000927653us-gaap:AllowanceForCreditLossMember2019-04-012020-03-310000927653mck:OtherAllowancesMember2019-03-310000927653mck:OtherAllowancesMember2019-04-012020-03-310000927653us-gaap:AllowanceForCreditLossMember2018-03-310000927653us-gaap:AllowanceForCreditLossMember2018-04-012019-03-310000927653mck:OtherAllowancesMember2018-03-310000927653mck:OtherAllowancesMember2018-04-012019-03-310000927653mck:ValuationAllowancesAndReservesDeductionsWrittenOffMember2020-04-012021-03-310000927653mck:ValuationAllowancesAndReservesDeductionsWrittenOffMember2019-04-012020-03-310000927653mck:ValuationAllowancesAndReservesDeductionsWrittenOffMember2018-04-012019-03-310000927653mck:ValuationAllowancesAndReservesDeductionsCreditedToOtherAccountsMember2020-04-012021-03-310000927653mck:ValuationAllowancesAndReservesDeductionsCreditedToOtherAccountsMember2019-04-012020-03-310000927653mck:ValuationAllowancesAndReservesDeductionsCreditedToOtherAccountsMember2018-04-012019-03-31
Table of Contents    

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended March 31, 2021
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from             to            
Commission File Number: 1-13252
mck-20210331_g1.jpg
McKESSON CORPORATION
(Exact name of registrant as specified in its charter)
Delaware 94-3207296
(State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.)
6555 State Hwy 161,
Irving, TX 75039
(Address of principal executive offices, including zip code)
(972) 446-4800
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
(Title of each class)(Trading Symbol)(Name of each exchange on which registered)
Common stock, $0.01 par valueMCKNew York Stock Exchange
0.625% Notes due 2021 MCK21ANew York Stock Exchange
1.500% Notes due 2025 MCK25New York Stock Exchange
1.625% Notes due 2026 MCK26New York Stock Exchange
3.125% Notes due 2029 MCK29New York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.   Yes      No  
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.   Yes      No  
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes      No  
Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).   Yes      No  
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer   Accelerated filer 
Non-accelerated filer   Smaller reporting company 
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).   Yes      No  
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant, computed by reference to the closing price as of the last business day of the registrant’s most recently completed second fiscal quarter, September 30, 2020, was approximately $23.9 billion.
Number of shares of common stock outstanding on April 30, 2021: 158,186,277
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s Proxy Statement for its 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.


Table of Contents
McKESSON CORPORATION
TABLE OF CONTENTS
 
ItemPage
1
1A.
1B.
2
3
4
5
6.
7.
7A.
8
9
9A.
9B.
10.
11.
12.
13.
14.
15.
16.



Table of Contents
McKESSON CORPORATION
PART I
Item 1.    Business.
General
McKesson Corporation (“McKesson,” the “Company,” or “we,” and other similar pronouns), originally founded in 1833, is a global leader in healthcare supply chain management solutions, retail pharmacy, community oncology and specialty care, and healthcare information solutions. McKesson partners with life sciences companies, manufacturers, providers, pharmacies, governments, and other healthcare organizations to help provide the right medicines, medical products, and healthcare services to the right patients at the right time, safely, and cost-effectively.
The Company’s fiscal year begins on April 1 and ends on March 31. Unless otherwise noted, all references in this document to a particular year shall mean the Company’s fiscal year. The Company was incorporated on July 7, 1994 in the State of Delaware.
Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act,”) are available free of charge on the Company’s website (www.mckesson.com under the “Investors — Financials — SEC Filings” caption) as soon as reasonably practicable after such material is electronically filed with, or furnished to, the Securities and Exchange Commission (“SEC” or the “Commission”). The content on any website referred to in this Annual Report on Form 10-K is not incorporated by reference into this report, unless expressly noted otherwise. The SEC maintains a website that contains reports, proxy and information statements, and other information regarding issuers, including the Company, that file electronically with the SEC. The address of the website is www.sec.gov.
Business Segments
Commencing with the second quarter of 2021, the Company operates its business in four reportable segments: U.S. Pharmaceutical, International, Medical-Surgical Solutions, and Prescription Technology Solutions (“RxTS”). The Company’s equity method investment in Change Healthcare LLC (“Change Healthcare JV”), which was split-off from McKesson in the fourth quarter of 2020, has been included in Other for retrospective periods presented.

Our U.S. Pharmaceutical segment distributes branded, generic, specialty, biosimilar and over-the-counter (“OTC”) pharmaceutical drugs, and other healthcare-related products. This segment provides practice management, technology, clinical support, and business solutions to community-based oncology and other specialty practices. In addition, the segment sells financial, operational, and clinical solutions to pharmacies (retail, hospital, alternate site) and provides consulting, outsourcing, technological, and other services.

Our International segment provides distribution and services to wholesale, institutional, and retail customers in 13 European countries and Canada where we own, partner or franchise with retail pharmacies, and support better, safer patient care by delivering vital medicines, supplies, and information technology solutions.

Our Medical-Surgical Solutions segment provides medical-surgical supply distribution, logistics, and other services to healthcare providers, including physician offices, surgery centers, nursing homes, hospital reference labs, and home health care agencies. We offer more than 275,000 national brand medical-surgical products as well as McKesson’s own line of high-quality products through a network of distribution centers within the United States (“U.S.”).

Our RxTS segment brings together CoverMyMeds, RelayHealth, RxCrossroads, and McKesson Prescription Automation, including Multi-Client Central Fill as a Service, to serve our biopharma and life sciences partners and patients. Together, we work across the healthcare delivery system to connect pharmacies, providers, payers, and biopharma for next-generation patient access and adherence solutions that help people get the medicine they need to live healthier lives.

3

Table of Contents
McKESSON CORPORATION
U.S. Pharmaceutical Segment:
Our U.S. Pharmaceutical segment provides distribution and logistics services for branded, generic, specialty, biosimilar, and OTC pharmaceutical drugs along with other healthcare-related products to customers. This business provides solutions and services to pharmacies, hospitals and other providers, pharmaceutical manufacturers, physicians, payers, and patients throughout the U.S. and Puerto Rico. We also source generic pharmaceutical drugs through our joint sourcing entity, ClarusONE Sourcing Services LLP (“ClarusONE”).

Our U.S. Pharmaceutical segment operates and serves customers through a network of 33 distribution centers, as well as a strategic redistribution center, a primary and a secondary redistribution center. We invest in technology and other systems at all of our distribution centers to enhance safety, reliability, and product availability. For example, we offer McKesson ConnectSM, an internet-based ordering system that provides item look-up and real-time inventory availability as well as ordering, purchasing, third-party reconciliation, and account management functionality. We make extensive use of technology as an enabler to ensure customers have the right products at the right time in the right place.

To maximize distribution efficiency and effectiveness, we follow the Six Sigma methodology, which is an analytical approach that emphasizes setting high-quality objectives, collecting data, and analyzing results to a fine degree in order to improve processes, reduce costs, and enhance service accuracy and safety. We provide solutions to our customers including supply management technology, world-class marketing programs, managed care, repackaging products, and services to help them meet their business and quality goals. We continue to implement information systems to help achieve greater consistency and accuracy both internally and for our customers.

We have four primary customer pharmaceutical distribution channels: (i) retail national accounts which include national and regional chains, food and drug combinations, mail order pharmacies, and mass merchandisers, (ii) independent, small, and medium chain retail pharmacies, (iii) institutional healthcare providers such as hospitals, health systems, integrated delivery networks, and long-term care providers, and (iv) provider solutions.

Retail National Accounts: We provide business solutions that help retail national account customers increase revenues and profitability. Solutions include:
Central FillSM - Prescription refill service that enables pharmacies to more quickly refill prescriptions remotely, more accurately, and at a lower cost, while reducing inventory levels and improving customer service.
Redistribution Centers - Three facilities totaling over 930,000 square feet that offer access to inventory for single source warehouse purchasing, including pharmaceuticals and biologics. These distribution centers also provide the foundation for a two-tiered distribution network that supports best-in-class direct store delivery.
McKesson SynerGx® - Generic pharmaceutical purchasing program and inventory management that helps pharmacies maximize their cost savings with a broad selection of generic drugs, competitive pricing, and one-stop shopping.
Inventory Management - An integrated solution comprising forecasting software and automated replenishment technologies that reduce inventory-carrying costs.
ExpressRx Track™ - Pharmacy automation solution featuring state-of-the-art robotics, upgraded imaging, and expanded vial capabilities, and industry-leading speed and accuracy in a small footprint.

Independent, Small and Medium Chain Retail Pharmacies: We provide managed care contracting, branding and advertising, merchandising, purchasing, operational efficiency, and automation that help independent pharmacists focus on patient care while improving profitability. Solutions include:
Health Mart® - Health Mart® is a national network of approximately 5,000 independently-owned pharmacies and is one of the industry’s most comprehensive pharmacy franchise programs. Health Mart® provides franchisees support for managed care contracting, branding and local marketing solutions, the Health Mart private label line of products, merchandising solutions, and programs for enhanced patient support.
Health Mart Atlas® - Comprehensive managed care and reconciliation assistance services that help independent pharmacies save time, access competitive reimbursement rates, and improve cash flow.
4

Table of Contents
McKESSON CORPORATION
McKesson Reimbursement AdvantageSM (“MRA”) - MRA is one of the industry’s most comprehensive reimbursement optimization packages, comprising financial services (automated claim resubmission), analytic services, and customer care.
McKesson OneStop Generics® - Generic pharmaceutical purchasing program that helps pharmacies maximize their cost savings with a broad selection of generic drugs, competitive pricing, and one-stop shopping.
Sunmark® - Complete line of products that provide retail independent pharmacies with value-priced alternatives to national brands.
FrontEdge™ - Strategic planning, merchandising, and price maintenance program that helps independent pharmacies maximize store profitability.
McKesson Sponsored Clinical Services (“SCS”) Network - Access to patient-support services that allow pharmacists to earn service fees and to develop stronger patient relationships.
McKesson RxOwnership Program - Assist independent pharmacist owners with the opportunity to remain independent via succession planning and business operation loans.

Institutional Healthcare Providers: We provide electronic ordering/purchasing and supply chain management systems that help customers improve financial performance, increase operational efficiencies, and deliver better patient care. Solutions include:
Fulfill-RxSM - Ordering and inventory management system that empowers hospitals to optimize the often complicated processes related to unit-based cabinet replenishment and inventory management.
Asset Management - Award-winning inventory optimization and purchasing management program that helps institutional providers lower costs while ensuring product availability.
SKY Packaging - Blister, Unit of Use, and Unit dose packaging containing the most widely prescribed dosages and strengths in generic oral-solid and liquid medications. SKY Packaging enables acute care, long-term care, and institutional pharmacies to provide cost-effective, uniform packaging.
McKesson Plasma and Biologics - A full portfolio of plasma-derivatives and biologic products.
McKesson OneStop Generics® - Described above.

Provider Solutions:

The U.S. Pharmaceutical segment provides a range of solutions to oncology and other specialty practices and offers community specialists (oncologists, rheumatologists, ophthalmologists, urologists, neurologists, and other specialists) an extensive set of customizable products and services designed to strengthen core practice operations, enhance value-based care delivery, and expand their service offering to patients. Community-based physicians in this business have broad flexibility and discretion to select the products and commitment levels that best meet their practice needs. Services in provider solutions include specialty drug distribution, group purchasing organizations (“GPO”) like Onmark®, technology solutions, practice consulting services, and vaccine distribution, including our exclusive distributor relationship with the Centers for Disease Control and Prevention’s (“CDC”) Vaccines for Children program. Additionally, to support the U.S. efforts to fight the coronavirus disease 2019 (“COVID-19”) pandemic, this segment is distributing the COVID-19 vaccines manufactured by ModernaTX, Inc. and Janssen Biotech Inc., a Janssen pharmaceutical company of Johnson & Johnson, at the direction of the U.S. government.

This business provides a variety of solutions, including practice operations, healthcare information technology, revenue cycle management and managed care contracting solutions, evidence-based guidelines, and quality measurements to support U.S. Oncology Network (“USON”), one of the nation’s largest networks of physician-led, integrated, community-based oncology practices dedicated to advancing high-quality, evidence-based cancer care. We also support U.S. Oncology Research, one of the nation’s largest research networks, specializing in oncology clinical trials.

5

Table of Contents
McKESSON CORPORATION
This segment includes our Ontada business, providing software to support the clinical, financial, and operational needs of our oncology practice partners. Ontada also partners with oncology providers and biopharma partners to perform real-world evidence studies, retrospective research, and to provide clinical data insights, advisory solutions and education opportunities.

This segment also offers solutions which enable its customers to drive greater efficiencies in their day to day operations, effectively managing their inventories and complying with complex government regulations. Solutions include McKesson Pharmacy Systems, MacroHelix and Supply Logix, all of which provide innovative software technology and services that support retail pharmacies and hospitals.

When we discuss specialty products or services, we consider the following factors: diseases requiring complex treatment regimens such as cancer and rheumatoid arthritis; plasma and biologics products; ongoing clinical monitoring requirements, high-cost, special handling, storage, and delivery requirements and, in some cases, exclusive distribution arrangements. Our use of the term “specialty” may not be comparable to that used by other industry participants, including our competitors.

International Segment:
Our International segment provides distribution and services to wholesale, institutional, and retail customers in 13 European countries where we own, partner, or franchise with retail pharmacies and operate through two businesses: Pharmaceutical Distribution and Retail Pharmacy. Our operations in Canada, including Rexall retail pharmacies, support better, safer patient care by delivering vital medicines, supplies, and information technology solutions throughout Canada.

Our European Pharmaceutical Distribution business delivers pharmaceutical and other healthcare-related products to pharmacies across Europe. This business functions as a vital link, using technology-enabled management systems at our regional wholesale branches to connect manufacturers to retail pharmacies, supplying medicines and other products sold in pharmacies.

Our European Retail Pharmacy business serves patients and consumers in European countries directly through approximately 2,100 of our own pharmacies and 5,500 participant pharmacies operating under brand partnership arrangements. In addition, this business includes outpatient dispensing, eCommerce and homecare arrangements mainly in the United Kingdom (“U.K.”), and provides traditional prescription pharmaceuticals, non-prescription products and medical services, and operates under the Lloyds pharmacy branding in Belgium, Ireland, Italy, Sweden, and the U.K. In addition, we partner with independent pharmacies under local banner programs.

McKesson Canada is one of the largest pharmaceutical wholesale and retail distributors in Canada. The wholesale business delivers products to retail pharmacies, hospitals, long-term care centers, clinics and institutions in Canada through a national network of distribution centers and provides logistics and distribution services for manufacturers.

Beyond wholesale pharmaceutical logistics and distribution, McKesson Canada provides automation and technology solutions to its retail and hospital customers. Additionally, McKesson Canada provides comprehensive specialty health services to Canadians, including a national network of specialty pharmacies, personalized patient care and support programs, and INVIVA, Canada’s first and largest accredited network of private infusion clinics.

The Canada retail business includes over 2,500 banner pharmacies under the IDA, Guardian, The Medicine Shoppe, Remedy’sRx, Proxim, and Uniprix banners, and more than 400 owned pharmacies under the Rexall brand where we provide patients with greater choice and access, integrated pharmacy care and industry-leading service levels. McKesson Canada also owns and operates Well.ca, a leading Canadian online health and wellness retailer.

6

Table of Contents
McKESSON CORPORATION
Medical-Surgical Solutions Segment:
Our Medical-Surgical Solutions segment delivers medical-supply distribution, logistics, biomedical maintenance, and other services to healthcare providers across the alternate-site spectrum. Our more than 250,000 customers include physician offices, surgery centers, post-acute care facilities, hospital reference labs, and home health agencies. We distribute medical-surgical supplies (such as gloves, needles, syringes and wound care products), infusion pumps, laboratory equipment and pharmaceuticals. Through a network of distribution centers within the U.S., we offer more than 275,000 products from national brand manufacturers and McKesson’s own high-quality product line. Through the right mix of products and services, we help improve efficiencies, profitability and compliance. We also never lose focus on helping customers improve patient and business outcomes. We develop customized plans to address the product, operational, and clinical support needs of our customers, including tackling inventory management, reducing administrative burdens, and training and educating clinical staff. We deliver for our customers, so they can deliver and care for their patients. Additionally, under a contract with the Department of Health and Human Services (“HHS”), McKesson’s Medical-Surgical business leverages its expertise to manage the assembly of supply kits needed to administer COVID-19 vaccines, as well as some of the sourcing of those supplies. The kits are being produced and distributed at the direction of HHS to support the administration of all vaccines approved in the U.S.

Prescription Technology Solutions Segment:
Our Prescription Technology Solutions segment works across the healthcare delivery system to connect pharmacies, providers, payers, and biopharma for next generation patient access and adherence solutions and operates primarily through the following businesses:
CoverMyMeds – Provides solutions to help patients get the medications they need to live healthy lives by seamlessly connecting the healthcare network to improve medication access; thereby increasing speed to therapy and reducing prescription abandonment. By facilitating appropriate access to medications, the company can help its customers avoid millions of dollars each year in administrative waste and avoidable medical spending caused by prescription abandonment.
RelayHealth Pharmacy Solutions – Provides workflow solutions to connect key healthcare stakeholders with more than 50,000 U.S. retail pharmacies and processes more than 18 billion pharmacy transactions annually.
RxCrossroads – Uses deep insights and innovative technology to help biopharma manufacturers thrive throughout the product lifecycle and create flexible, connected solutions that increase access, adherence, and safe use conditions for therapies and interventions.
McKesson Prescription Automation (“MPA”) – Provides customized pharmacy automation technology that allows our partners to control costs, work faster, offer higher-quality products, and better serve patients.
Multi-Client Central Fill as a Service – McKesson-owned pharmacy that utilizes MPA dispensing automation to enable low-cost fulfillment of up to 50,000 prescriptions daily for retail and independent pharmacy customers, new digital pharmacies, and manufacturers.

Other:
Change Healthcare: Our equity ownership interest in Change Healthcare JV, a joint venture, has been accounted for using the equity method of accounting. Change Healthcare JV provided software and analytics, network solutions, and technology-enabled services that deliver wide-ranging financial, operational, and clinical benefits to payers, providers and consumers. On March 10, 2020, we completed the separation of our interest in the Change Healthcare JV through a split-off transaction. This transaction reduced our investment in the Change Healthcare JV to zero. Refer to Financial Note 2, “Investment in Change Healthcare Joint Venture,” to the consolidated financial statements appearing in this Annual Report on Form 10-K for additional information related to this transaction.

7

Table of Contents
McKESSON CORPORATION
Restructuring, Business Combinations, Investments, and Divestitures
We have undertaken additional strategic initiatives in recent years designed to further focus on our core healthcare businesses and enhance our competitive position. These initiatives are detailed in Financial Notes 2, 3, 4, and 5, “Investment in Change Healthcare Joint Venture,” “Held for Sale,” “Restructuring, Impairment, and Related Charges,” and “Business Acquisitions and Divestitures,” to the consolidated financial statements appearing in this Annual Report on Form 10-K.
Competition
We face highly competitive global environments. Additionally, in recent years the healthcare industry has been subject to increasing consolidation. In the pharmaceutical distribution environment in which our U.S. Pharmaceutical and International segments operate, we face strong competition from international, national, regional and local full-line, short-line and specialty distributors, service merchandisers, self-warehousing chain drug stores, manufacturers engaged in direct distribution, third-party logistics companies, and large payer organizations. Our retail businesses, which primarily operate in our International segment, face competition from various global, national, regional, and local global retailers, including chain and independent pharmacies. We consider our largest competitors in distribution, wholesaling, and logistics to be AmerisourceBergen Corporation and Cardinal Health, Inc.
Our Medical-Surgical Solutions segment provides medical-surgical supply distribution, logistics, and other services to healthcare providers, including physician offices, surgery centers, nursing homes, hospital reference labs, home health care agencies, and alternative health sites with competition from a wide range of national and regional medical supply and equipment distributors throughout the U.S.
Our RxTS business experiences substantial competition from many companies, including other software services firms, consulting firms, shared service vendors, and internet-based companies with technology applicable to the healthcare industry. Competition in this business varies in size from large to small companies, in geographical coverage, and in scope and breadth of products and services offered.
In addition, we compete with other service providers, pharmaceutical and other healthcare manufacturers, as well as other potential customers of our businesses, which may from time to time decide to develop, for their own internal needs, supply management capabilities that might otherwise be provided by our businesses. We believe that our scale and diversity of product and service offerings are our primary competitive advantages. In all areas, key competitive factors include price, quality of service, breadth of product lines, innovation and, in some cases, convenience to the customer.
Patents, Trademarks, Copyrights, and Licenses
McKesson and its subsidiaries hold patents, copyrights, trademarks, and trade secrets related to McKesson products and services. We pursue patent protection for our innovations and obtain copyright protection for our original works of authorship, when such protection is advantageous. Through these efforts, we have developed a portfolio of patents and copyrights in the U.S. and worldwide. In addition, we have registered or applied to register certain trademarks and service marks in the U.S. and in foreign countries.
We believe that, in the aggregate, McKesson’s confidential information, patents, copyrights, trademarks, and intellectual property licenses are important to its operations and market position, but we do not consider any of our businesses to be dependent upon any one patent, copyright, trademark, or trade secret, or any family or families of the same. We cannot guarantee that our intellectual property portfolio will be sufficient to deter misappropriation, theft, or misuse of our technology, nor that we can successfully enjoin infringers. We periodically receive notices alleging that our products or services infringe on third party patents and other intellectual property rights. These claims may result in McKesson entering settlement agreements, paying damages, discontinuing use or sale of accused products, or ceasing other activities. While the outcome of any litigation or dispute is inherently uncertain, we do not believe that the resolution of any of these infringement notices would have a material adverse impact on our results of operation.
8

Table of Contents
McKESSON CORPORATION
We hold inbound licenses for certain intellectual property that is used internally, and in some cases, utilized in McKesson’s products or services. While it may be necessary in the future to seek or renew licenses relating to various aspects of our products and services, we believe, based upon past experience and industry practice, such licenses generally can be obtained on commercially reasonable terms. We believe our operations and products and services are not materially dependent on any single license or other agreement with any third party.
Human Capital
Our vision for a healthier world begins with our employees, who strive to bring our mission to life every day. As a company, we deliver programs that focus on improving employee health and wellness, creating opportunities for growth and development, and providing an inclusive workplace where our employees can reach their full potential. At March 31, 2021, we had approximately 76,000 employees worldwide, including 17,000 part-time employees and 32,000 employees in the U.S.
Diversity, Equity, and Inclusion (“DEI”): At McKesson, we are committed to making DEI integral to everything we do, because we believe building a healthier future is everyone’s business. We build successful teams by recruiting, developing, and retaining diverse talent and we recognize our culture of inclusion as an important element that drives long-term shareholder value. During 2021, we appointed the newly created role of chief impact officer, who will drive our strategy and execution related to DEI as well as sustainability, environmental, social, and governance (“ESG”), and philanthropy.

At March 31, 2021, women and people of color represented the following:
 McKesson
Overall
McKesson
Leadership (2)
Metric (1)
Women (3)
63 %35 %
People of Color (4) (5)
45 %21 %
(1)The data for our metrics is derived from our voluntary, self-identification process as of March 31, 2021 and therefore represents our best estimate at this time.
(2)Represents our leadership at the vice president level and above.
(3)Represents worldwide employees.
(4)Represents U.S. employees only as the data for Canada and Europe is not available.
(5)People of Color includes the following races and ethnicities: Hispanic or Latino, Black or African American, Asian, Native Hawaiian or Other Pacific Islander, American Indian or Alaska Native, or Two or More Races.
Culture and Leadership: What sets McKesson apart as an exceptional place is our people. Our employees understand that together, unified by our global I2CARE and ILEAD principles, we fulfill our mission of improving care in every setting. Our I2CARE values (Integrity, Inclusion, Customer-First, Accountability, Respect, Excellence) are foundational to all that we do, and who we are as a company. ILEAD (Inspire, Leverage, Execute, Advance, Develop) is our common definition and shared commitment to leadership. By embracing this commitment, we bring out the best in ourselves and position McKesson to continue to drive better health – for our company, our customers, and the patients they serve for years to come. We promote leadership behaviors through culture initiatives that offer practical tips on how to debate, decide, and commit, be open and candid, and maintain an enterprise-first mindset when navigating conversations affecting operations within and across our business segments. These values and behaviors help make McKesson unique.
9

Table of Contents
McKESSON CORPORATION
Investment in Employees: To support employee growth, we provide regular feedback and training, and work to create and maintain inclusive work settings where everyone can bring their authentic self to work and feel welcomed and appreciated, and where their perspectives are sought out, heard, and considered. Through training, we encourage leaders to embrace diverse perspectives and lead inclusively. Employee development programs include training, coaching, and 360-degree assessments, which can support the careers of future leaders and their teams. We offer financial assistance programs for higher education opportunities that support employees’ career growth at the company. To provide compensation that is focused on attracting and retaining talent with the skills and experience necessary for a specific role, our compensation program is built on a set of quantifiable factors defined by our guiding principles of internal fairness, market competitiveness, and pay for performance. We operate in several countries and our benefits offerings vary accordingly. We offer health and wellness benefits to advance the physical, mental, and social well-being of our people, savings programs to help prepare them for retirement, and flexible work arrangements, among other benefits offerings, when possible. In response to the COVID-19 pandemic, we offered extended medical benefits covering COVID-19 related visits, treatment and testing, expanded telehealth options, emergency paid time off (“PTO”), and a platform for employees to donate their regular PTO to co-workers who were more impacted by COVID-19. We also seek employee feedback through an annual employee opinion survey, which assesses our employees’ levels of engagement, commitment, and overall satisfaction using industry benchmarks, and we then design action plans to improve those metrics.
Health and Safety: Our security and safety departments employ systems designed to continually monitor our facilities and work environment to help identify and prevent or mitigate any potential risks. This includes having procedures in place and investing in equipment for both physical and electronic security. We routinely assess facilities to monitor closely adherence to established security and safety standards. If we identify a vulnerability, it is documented, and the facility prepares an action plan. Our employees receive specialized training related to their role, work setting, and equipment used in their work environment. As our processes evolve, we update relevant safety training modules, which may include new employee training programs. In response to the COVID-19 pandemic, our priority has been, and continues to be, protecting the health and safety of our employees. The various responses we put in place to mitigate the impact of COVID-19 on our business operations, including telecommuting and work-from-home policies, restricted travel, and enhanced safety measures, are intended to limit employee exposure to the virus that causes COVID-19 as they perform their jobs while also providing employee support programs and a sense of belonging. For additional information on our response to COVID-19 in the workplace, refer to the COVID-19 section of “Trends and Uncertainties” in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7 of Part II included in this Annual Report on Form 10-K.
Government Regulation
McKesson, generally and in many of the highly regulated industries in which it operates, is subject to oversight by various federal, state, and local governmental entities. Failure to comply with laws, regulations, and guidance promulgated by those entities could have a material adverse impact to the Company’s business operations, reputation, results of operations, and financial position.
Controlled Substances: We are subject to the operating and security standards of the Drug Enforcement Administration (“DEA”), the U.S. Food and Drug Administration (“FDA”), various state boards of pharmacy, state health departments, HHS, the Centers for Medicare & Medicaid Services (“CMS”), and other comparable agencies. We have received monetary penalties and/or licensing sanctions pursuant to these requirements and future allegations of noncompliance could result in an inability to obtain, maintain or renew permits, licenses or other regulatory approvals needed for the operation of our businesses.
10

Table of Contents
McKESSON CORPORATION
Additionally, the Company is a defendant in approximately 3,200 cases alleging claims related to the distribution of controlled substances (opioids), as described in Financial Note 19, “Commitments and Contingent Liabilities,” to the consolidated financial statements in this Annual Report on Form 10-K. The plaintiffs in those cases include governmental entities (such as states, provinces, counties and municipalities) as well as businesses, groups and individuals. As a result of ongoing, advanced discussions with state attorneys general and plaintiffs’ representatives regarding a framework to resolve the claims of governmental entities, and our assessment of certain other opioid-related claims, we have reached a stage at which a broad settlement of opioid claims by governmental entities is probable and recorded a charge of $8.1 billion for the year ended March 31, 2021 within “Claims and litigation charges, net” in our Consolidated Statement of Operations in this Annual Report on Form 10-K. Because of the many uncertainties associated with any potential settlement arrangement or other resolution of opioid-related litigation, including the uncertainty of the scope of participation by plaintiffs in any potential settlement, we are not able to reasonably estimate the upper or lower ends of the range of ultimate possible loss for all opioid-related litigation matters. The adverse outcome of legal proceedings might also involve significant expense, management time and distraction, and risk of loss that can be difficult to predict or quantify. In addition to this litigation, legislative or regulatory measures related to the distribution of controlled substances such as prescription opioids could affect our business in ways that we may not be able to predict. For example, some states have passed legislation that could require us to pay taxes or assessments on the distribution of opioid medications in those states and other states have considered similar legislation.
Government Contracts: Our contracts with government entities are subject to unique compliance risks and typically are subject to procurement laws that include socio-economic, employment practices, environmental protection, recordkeeping and accounting, and other requirements. We are subject to government audits, investigations and oversight proceedings. Government agencies routinely review and audit government contractors to determine whether they are complying with contractual and legal requirements. If we fail to comply with these requirements, or we fail an audit, we may be subject to various sanctions such as monetary damages, criminal and civil penalties, termination of contracts and suspension or debarment from government contract work. These requirements complicate our business and increase our compliance burden and material non-compliance could harm our reputation.
Local, state, and federal governments continue to strengthen their position and scrutiny over practices involving or allegedly involving fraud, waste, and abuse affecting Medicare, Medicaid, other government healthcare programs, and government contracts. Our relationships with pharmaceutical and medical surgical product manufacturers and healthcare providers, as well as our provision of products and services to government entities, subject our business to laws, regulation, and government guidance on fraud and abuse. Many of these laws are vague or indefinite and have not been interpreted by the courts and, as such, may be interpreted or applied by a prosecutorial, regulatory, or judicial authority in a manner that could require us to make changes in our operations. Failure to comply with applicable laws, regulations, and government guidance, including but not limited to those involving the regulation of controlled substances, the federal Anti-Kickback Statute, and others, could subject us to federal or state government investigations or qui tam actions, and to liability for damages and civil and criminal penalties, including the loss of licenses or our ability to participate in Medicare, Medicaid and other federal and state healthcare programs, or pursue government contracts.
Healthcare Regulation: In the U.S., the Patient Protection and Affordable Care Act (“ACA”) significantly expanded health insurance coverage to uninsured Americans and changed the way healthcare is financed by both governmental and private payers. There are also further efforts to broaden healthcare coverage. U.S. lawmakers also have explored proposals to reduce drug prices, including requiring price transparency and drug importation measures. Provincial governments in Canada that provide partial funding for the purchase of pharmaceuticals and independently regulate the sale and reimbursement of drugs have sought to reduce the costs of publicly funded health programs. For example, provincial governments have taken steps to reduce consumer prices for generic pharmaceuticals and, in some provinces, change professional allowances paid to pharmacists by generic manufacturers. Many European governments provide or subsidize healthcare to consumers and regulate pharmaceutical prices, patient eligibility and reimbursement levels in order to control government healthcare system costs. Some European governments have implemented or are considering austerity measures to reduce healthcare spending. These measures exert pressure on the pricing and reimbursement timelines for pharmaceuticals and may cause our customers to purchase fewer of our products and services or influence us to reduce prices. There is substantial uncertainty about the likelihood, timing and results of these health reform efforts.
11

Table of Contents
McKESSON CORPORATION
Additionally, there have been increasing efforts by governments to regulate the pharmaceutical distribution system in order to prevent the introduction of counterfeit, adulterated and/or mislabeled drugs into the pharmaceutical distribution system, otherwise known as pedigree tracking. For example, the U.S. Drug Quality and Security Act of 2013 (“DQSA”) requires us to participate in a federal prescription drug track and trace system that preempts state drug pedigree requirements, and the U.S. Food and Drug Administration Amendments Act of 2007 requires the FDA to establish standards and identify and validate effective technologies, such as track and trace or authentication technologies, to secure the pharmaceutical supply chain against counterfeit drugs. We also have record-keeping and other obligations under the E.U. Falsified Medicines Directive. Pedigree tracking laws such as these increase our compliance burden and our pharmaceutical distribution costs.
Data Security and Privacy: We are subject to a variety of privacy and data protection laws that change frequently and have requirements that vary from jurisdiction to jurisdiction. For example, under the Health Insurance Portability and Accountability Act of 1996 (“HIPAA”) we must maintain administrative, physical and technological safeguards to protect individually identifiable health information (“protected health information”) and ensure the confidentiality, integrity, and availability of electronic protected health information. We are subject to significant compliance obligations under privacy laws such as the General Data Protection Regulation (“GDPR”) in the European Union, the Personal Information Protection and Electronic Documents Act (“PIPEDA”) in Canada, and the California Consumer Protection Act (“CCPA”). Some privacy laws prohibit the transfer of personal information to certain other jurisdictions. We are subject to privacy and data protection compliance audits or investigations by various government agencies. Failure to comply with these laws subjects us to potential regulatory enforcement activity, fines, private litigation including class actions, and other costs. We also have contractual obligations to customers that might be breached if we fail to comply with privacy laws. Our efforts to comply with privacy laws complicate our operations and add to our compliance costs.
We and our external service providers use technology and systems to perform our business operations, such as the secure electronic transmission, processing, storage and hosting of sensitive information, including protected health information and other types of personal information, confidential financial information, proprietary information, and other sensitive information relating to our customers, company and workforce. Despite physical, technical, and administrative security measures that we implement in order to, among other things, address regulatory requirements, our technology systems and operations may continue to be subject to cybersecurity incidents. The risk of cybersecurity incidents may be increased due to a variety of factors, both internal and external. A cybersecurity incident might involve a material data breach or other material impact to the integrity and operations of the technology systems and operations, which might result in litigation or regulatory action.
Environmental Regulation: We are subject to many environmental and hazardous materials regulations, including those relating to radiation-emitting equipment operated at U.S. Oncology Network practices. Additionally, our operations are subject to regulations under various federal, state, local and foreign laws concerning the environment, including laws addressing the discharge of pollutants into the air and water, the management and disposal of hazardous substances and wastes, and the cleanup of contaminated sites, as discussed in more detail below. We could incur substantial costs, including cleanup costs, fines and civil or criminal sanctions, and third-party damage or personal injury claims, if in the future we were to violate or become liable under environmental laws. We are committed to maintaining compliance with all environmental laws applicable to our operations, products and services and to reducing our environmental impact across all aspects of our business. We meet this commitment through an environmental strategy and sustainability program.
We sold our chemical distribution operations in 1987 and retained responsibility for certain environmental obligations. Agreements with the Environmental Protection Agency and certain states may require environmental assessments and cleanups at several closed sites. These matters are described further in Financial Note 19, “Commitments and Contingent Liabilities,” to the consolidated financial statements appearing in this Annual Report on Form 10-K.
The liability for environmental remediation and other environmental costs is accrued when the Company considers it probable and can reasonably estimate the costs. Environmental costs and accruals, including that related to our legacy chemical distribution operations, presently are not material to our operations or financial position. Although there is no assurance that existing or future environmental laws applicable to our operations or products will not have a material adverse impact on our operations or financial condition, we do not currently anticipate material capital expenditures for environmental matters. Other than the expected expenditures that may be required in connection with our legacy chemical distribution operations, we do not anticipate making substantial capital expenditures either for environmental issues or to comply with environmental laws, regulations, or government guidance in the future. The amount of our capital expenditures for environmental compliance was not material in 2021 and is not expected to be material in the next year.
12

Table of Contents
McKESSON CORPORATION
Climate Change Regulation: Governments in the U.S. and abroad are considering new or expanded laws to address climate change. Such laws may include limitations on greenhouse gas (“GHG”) emissions, mandates that companies implement processes to monitor and disclose climate-related matters, additional taxes or offset charges on specified energy sources, and other requirements. Compliance with climate-related laws may be further complicated by disparate regulatory approaches in various jurisdictions. New or expanded climate-related laws could impose substantial costs on us. Until the timing and extent of climate-related laws are clarified, we cannot predict their potential effect on our capital expenditures or our results of operations.
Other Information about the Business
Customers: During 2021, sales to our ten largest customers, including group purchasing organizations (“GPOs”) accounted for approximately 51% of our total consolidated revenues. Sales to our largest customer, CVS Health Corporation (“CVS”), accounted for approximately 21% of our total consolidated revenues in 2021. In May 2019, we extended our pharmaceutical distribution relationship with CVS to June 2023. Our ten largest customers comprised approximately 32%, and CVS was approximately 19%, of total trade accounts receivable at March 31, 2021. We also have agreements with GPOs, each of which functions as a purchasing agent on behalf of member hospitals, pharmacies and other healthcare providers, as well as with government entities and agencies. The accounts receivable balances are with individual members of the GPOs, and therefore no significant concentration of credit risk exists. Substantially all of these revenues and accounts receivable are included in our U.S. Pharmaceutical segment.
Suppliers: We obtain pharmaceutical and other products from manufacturers, none of which accounted for more than 7% of our purchases in 2021. The loss of a supplier could adversely affect our business if alternate sources of supply are unavailable. We believe that our relationships with our suppliers are generally sound. The ten largest suppliers in 2021 accounted for approximately 50% of our purchases.
Some of our distribution arrangements with the manufacturers provides us compensation based on a percentage of our purchases. In addition, we have certain distribution arrangements with pharmaceutical manufacturers that include an inflation-based compensation component whereby we benefit when the manufacturers increase their prices as we sell our existing inventory at the new higher prices. For these manufacturers, a reduction in the frequency and magnitude of price increases, as well as restrictions in the amount of inventory available to us, could have an adverse impact on our gross profit margin.
Research and Development: Research and development (“R&D”) expenses were $74 million, $96 million, and $71 million during 2021, 2020, and 2019, respectively.
Financial Information About Foreign and Domestic Operations: Certain financial information relating to foreign and domestic operations is included in Financial Note 22, “Segments of Business,” to the consolidated financial statements appearing in this Annual Report on Form 10-K. See “Risk Factors” in Item 1A of Part I below for information regarding risks associated with our foreign operations.
Forward-Looking Statements
This Annual Report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7 of Part II of this report and the “Risk Factors” in Item 1A of Part I of this report, contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933 (“Securities Act”) and section 21E of the Securities Exchange Act of 1934, as amended. Some of these statements can be identified by use of forward-looking words such as “believes,” “expects,” “anticipates,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” or “estimates,” or the negative of these words, or other comparable terminology. The discussion of financial trends, strategy, plans, or intentions may also include forward-looking statements. Forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those projected, anticipated, or implied. Although it is not possible to predict or identify all such risks and uncertainties, they include, but are not limited to, the factors discussed in Item 1A of Part I of this report under “Risk Factors” and in our publicly available SEC filings and press releases. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date such statements were first made. Except to the extent required by federal securities laws, we undertake no obligation to publicly release the result of any revisions to any forward-looking statements to reflect events or circumstances after the date the statements are made, or to reflect the occurrence of unanticipated events.
13

Table of Contents
McKESSON CORPORATION
Item 1A.    Risk Factors
The discussion below identifies certain representative risks that might cause our actual business results to materially differ from our estimates. It is not practical to identify or describe all risks and uncertainties that might materially impact our business operations, reputation, financial position or results of operations. Our business could be materially affected by risks that we have not yet identified or that we currently consider to be immaterial. This is not a complete statement of all potential risks and uncertainties.
Litigation and Regulatory Risks
We experience costly and disruptive legal disputes.
We are routinely named as a defendant in litigation or regulatory proceedings and other legal disputes, which may include asserted class action litigation, such as those described in Financial Note 19, “Commitments and Contingent Liabilities,” to the consolidated financial statements in this report. Regulatory proceedings might involve allegations such as false claims, healthcare fraud and abuse, and antitrust violations. Civil litigation proceedings might involve commercial, employment, environmental, intellectual property, tort and other claims. Despite valid defenses that we assert, legal disputes are often costly, time-consuming, distracting to management and disruptive to normal business operations. The outcome of legal disputes is difficult to predict. Outcomes can occur that are not justified by the evidence or existing law. The uncertainty and expense associated with unresolved legal disputes might harm our business and reputation even if the matter is favorably resolved. Accordingly, any legal dispute might have a materially adverse impact on our reputation, our business operations and our financial position or results of operations.
We might experience losses not covered by insurance.
Our business exposes us to risks that are inherent in the distribution, manufacturing, dispensing and administration of pharmaceuticals and medical-surgical supplies, the provision of ancillary services, the conduct of our payer businesses and the provision of products that assist clinical decision-making and relate to patient medical histories and treatment plans. For example, pharmacy operations are exposed to risks such as improper filling of prescriptions, mislabeling of prescriptions, inadequacy of warnings, unintentional distribution of counterfeit drugs and expiration of drugs. Although we seek to maintain adequate insurance coverage, such as property insurance for inventory and professional and general liability insurance, coverages on acceptable terms might be unavailable, or coverages might not cover our losses. We generally seek to limit our contractual exposure, but limitations of liability or indemnity provisions in our contracts may not be enforceable or adequately protect us from liability. Uninsured losses might have a materially adverse impact on our business operations and our financial position or results of operations.
We experience costly legal disputes, government actions and adverse publicity regarding our role in distributing controlled substances such as opioids.
The Company is a defendant in approximately 3,200 cases alleging claims related to the distribution of controlled substances (opioids), as described in Financial Note 19, “Commitments and Contingent Liabilities,” to the consolidated financial statements in this report. We regularly are named as a defendant in similar, new cases. The plaintiffs in those cases include governmental entities (such as states, provinces, counties and municipalities) as well as businesses, groups and individuals. The cases allege violations of controlled substance laws and other laws, and they make common law claims such as negligence and public nuisance. Many of these cases raise novel theories of liability. Any proceedings can have unexpected outcomes that are not justified by evidence or existing law. All proceedings involve significant expense, management time and distraction, and risk of loss that can be difficult to predict or quantify. It is not uncommon for claims to be resolved over many years. Proceedings can result in monetary damages, penalties and fines, and injunctive or other relief. Although the Company has valid defenses and is vigorously defending itself, some proceedings have been and others may be resolved by negotiated outcome. Our reputation has been and may continue to be impacted by publicity regarding the litigation and related allegations. The adverse outcome of legal proceedings might have a materially adverse impact on our business operations and our financial position or results of operations.
14

Table of Contents
McKESSON CORPORATION
We might experience increased costs to distribute controlled substances such as opioids.
Legislative, regulatory or industry measures related to the distribution of controlled substances such as prescription opioids could affect our business in ways that we may not be able to predict. For example, some states have passed legislation that could require us to pay taxes or assessments on the distribution of opioid medications in those states and other states have considered similar legislation. Liabilities for taxes or assessments or other costs of compliance under any such laws might have a materially adverse impact on our reputation, business operations, and our financial position or results of operations.
We are subject to extensive, complex and challenging healthcare and other laws.
Our industry is highly regulated, and further regulation of our distribution businesses and technology products and services could impose increased costs, negatively impact our profit margins and the profit margins of our customers, delay the introduction or implementation of our new products, or otherwise negatively impact our business and expose the Company to litigation and regulatory investigations. For example, we are subject to many environmental and hazardous materials regulations, including those relating to radiation-emitting equipment operated at U.S. Oncology Network practices. Additionally, we are subject to various routine agency (e.g., Drug Enforcement Administration (“DEA”), the U.S. Food and Drug Administration (“FDA”)) inspections to determine compliance with various federal regulations. Any noncompliance by us with applicable laws or the failure to maintain, renew or obtain necessary permits and licenses could lead to litigation and might have a materially adverse impact on our business operations and our financial position or results of operations.
We are subject to extensive and frequently changing local, state and federal laws and regulations relating to healthcare fraud, waste and abuse.
    Local, state and federal governments continue to strengthen their position and scrutiny over practices involving or allegedly involving fraud, waste and abuse affecting Medicare, Medicaid and other government healthcare programs. Our relationships with pharmaceutical and medical surgical product manufacturers and healthcare providers, as well as our provision of products and services to government entities, subject our business to laws and regulations on fraud and abuse, which among other things: (1) prohibit persons from soliciting, offering, receiving or paying any remuneration in order to induce the referral of a patient for treatment or to induce the ordering or purchasing of items or services that are in any way paid for by Medicare, Medicaid or other government-sponsored healthcare programs; (2) impose many restrictions upon referring physicians and providers of designated health services under Medicare and Medicaid programs; and (3) prohibit the knowing submission of a false or fraudulent claim for payment to, and knowing retention of an overpayment by, a federal healthcare program such as Medicare and Medicaid. Many of these laws, regulations, and government guidance, including those relating to marketing incentives, are vague or indefinite and have not been interpreted by the courts. The laws may be interpreted or applied by a prosecutorial, regulatory, or judicial authority in a manner that could require us to make changes in our operations. Failures to comply with applicable laws subject us to federal or state government investigations or qui tam actions, and to liability for damages and civil and criminal penalties, including the loss of licenses or our ability to participate in Medicare, Medicaid and other federal and state healthcare programs. These sanctions might have a materially adverse impact on our business operations and our financial position or results of operations.
We might lose our ability to purchase, compound, store or distribute pharmaceuticals and controlled substances.
We are subject to the operating and security standards of the DEA, the FDA, various state boards of pharmacy, state health departments, Department of Health and Human Services (“HHS”), the Centers for Medicare & Medicaid Services (“CMS”) and other comparable agencies. Certain of our businesses may be required to register for permits and/or licenses with, and comply with operating and security standards of, the DEA, FDA, HHS, CMS, various state boards of pharmacy, state health departments and/or comparable state agencies as well as foreign agencies and certain accrediting bodies, depending upon the type of operations and location of product development, manufacture, distribution, and sale. For example, we are required to hold valid DEA and state-level registrations and licenses, meet various security and operating standards and comply with the Controlled Substances Act and its accompanying regulations governing the sale, marketing, packaging, holding, distribution, and disposal of controlled substances. Noncompliance with these requirements has resulted in monetary penalties and/or licensing sanctions. For example, under a January 2017 agreement with the DEA and Department of Justice we paid $150 million to settle potential administrative and civil claims about our practices for reporting suspicious orders of controlled substances and the DEA suspended, on a staggered basis for limited periods of time, our registrations to distribute certain controlled substances from four distribution centers. As of March 31, 2021, suspensions at the four distribution centers had all expired by their own terms. If we are not able to obtain, maintain or renew permits, licenses or other regulatory approvals needed for the operation of our businesses, it might have a materially adverse impact on our business operations and our financial position or results of operations.
15

Table of Contents
McKESSON CORPORATION
Pedigree tracking laws increase our compliance burden and our pharmaceutical distribution costs.
There have been increasing efforts by governments to regulate the pharmaceutical distribution system in order to prevent the introduction of counterfeit, adulterated and/or mislabeled drugs into the pharmaceutical distribution system, otherwise known as pedigree tracking. For example, the U.S. Drug Quality and Security Act of 2013 (“DQSA”) requires us to participate in a federal prescription drug track and trace system that preempts state drug pedigree requirements, and the U.S. Food and Drug Administration Amendments Act of 2007 requires the FDA to establish standards and identify and validate effective technologies, such as track and trace or authentication technologies, to secure the pharmaceutical supply chain against counterfeit drugs. We also have record-keeping and other obligations under the E.U. Falsified Medicines Directive. Pedigree tracking laws such as these increase our compliance burden and our pharmaceutical distribution costs, and they might have a materially adverse impact on our business operations and our financial position or results of operations.
Privacy and data protection laws increase our compliance burden.
We are subject to a variety of privacy and data protection laws that change frequently and have requirements that vary from jurisdiction to jurisdiction. For example, under the Health Insurance Portability and Accountability Act of 1996 (“HIPAA”) we must maintain administrative, physical and technological safeguards to protect individually identifiable health information (“protected health information”) and ensure the confidentiality, integrity and availability of electronic protected health information. We are subject to significant compliance obligations under privacy laws such as the General Data Protection Regulation in the European Union (“GDPR”), the Personal Information Protection and Electronic Documents Act (“PIPEDA”) in Canada, and the California Consumer Protection Act (“CCPA”). Some privacy laws prohibit the transfer of personal information to certain other jurisdictions. We are subject to privacy and data protection compliance audits or investigations by various government agencies. Failure to comply with these laws subjects us to potential regulatory enforcement activity, fines, private litigation including class actions, and other costs. We also have contractual obligations to customers that might be breached if we fail to comply with privacy laws. Our efforts to comply with privacy laws complicates our operations and adds to our compliance costs. A significant privacy breach or failure to comply with privacy laws might have a materially adverse impact on our reputation, business operations and our financial position or results of operations.
Anti-bribery and anti-corruption laws increase our compliance burden.
We are subject to laws prohibiting improper payments and bribery, including the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act and similar regulations in foreign jurisdictions. The U.K. Bribery Act, for example, prohibits both domestic and international bribery, as well as bribery across both private and public sectors. An organization that fails to prevent bribery committed by anyone associated with the organization can be charged under the U.K. Bribery Act unless the organization can establish the defense of having implemented adequate procedures to prevent bribery. Our failure to comply with these laws might subject us to civil and criminal penalties that might have a materially adverse impact on our reputation, business operations and our financial position or results of operations.
16

Table of Contents
McKESSON CORPORATION
Company and Operational Risks
We might record significant charges from impairment to goodwill, intangibles and other assets or investments.
We are required under U.S. Generally Accepted Accounting Principles (“GAAP”) to test our goodwill for impairment annually or more frequently if indicators for potential impairment exist. Indicators that are considered include significant changes in performance relative to expected operating results, significant changes in the use of the assets, significant negative industry or economic trends or a significant decline in the Company’s stock price and/or market capitalization for a sustained period of time. In addition, we periodically review our intangible and other long-lived assets for impairment when events or changes in circumstances, such as a divestiture, indicate the carrying value may not be recoverable. Factors that may be considered a change in circumstances indicating that the carrying value of our intangible and other long-lived assets may not be recoverable include slower growth rates, the loss of a significant customer, burdensome new laws or divestiture of a business or asset for less than its carrying value. There are inherent uncertainties in management’s estimates, judgments and assumptions used in assessing recoverability of goodwill, intangible and other long-lived assets. Any material changes in key assumptions, including failure to meet business plans, negative changes in government reimbursement rates, a deterioration in the U.S. and global financial markets, an increase in interest rate or an increase in the cost of equity financing by market participants within the industry or other unanticipated events and circumstances, may decrease the projected cash flows or increase the discount rates and could potentially result in an impairment charge. For example, the COVID-19 pandemic has disrupted the global economy and exacerbated uncertainties inherent in estimates, judgments and assumptions used in our forecasts and impairment assessments. We may be required to record a significant charge to earnings in our consolidated financial statements during the period in which any impairment of our goodwill or intangible and other long-lived assets is determined, which might have a materially adverse impact on our business operations and our financial position or results of operations.
We experience cybersecurity incidents that might significantly compromise our technology systems or might result in material data breaches.
We and our external service providers use technology and systems to perform our business operations, such as the secure electronic transmission, processing, storage and hosting of sensitive information, including protected health information and other types of personal information, confidential financial information, proprietary information, and other sensitive information relating to our customers, company and workforce. Despite physical, technical, and administrative security measures, our technology systems and operations have been, and likely will continue to be, subject to cyberattacks from sources beyond our control. Cybersecurity incidents include actual or attempted unauthorized access, tampering, malware insertion, ransomware attacks or other system integrity events. The risk of cyberattacks may be increased due to a variety of factors, both internal and external. A cybersecurity incident might involve a material data breach or other material impact to the integrity and operations of our technology systems, which might result in litigation or regulatory action, loss of customers or revenue, and increased expense, any of which might have a materially adverse impact on our business operations, reputation, and our financial position or results of operations.
We might experience significant problems with information systems or networks.
We rely on sophisticated information systems and networks to perform our business operations, such as to obtain, rapidly process, analyze and manage data that facilitate the purchase and distribution of thousands of inventory items from distribution centers. If those information systems suffer errors, interruptions, or become unavailable, there might be a materially adverse impact on our business operations, reputation, and our financial position or results of operations.
Our products or services might not conform to specifications or perform as we intend.
We sell and provide services involving complex software and technology that may contain errors, especially when first introduced to market. Healthcare professionals delivering patient care tend to have heightened sensitivity to system and software errors. If our software and technology services are alleged to have contributed to faulty clinical decisions or injury to patients, we might be subject to claims or litigation by users of our software or services or their patients. Errors or failures might damage our reputation and negatively affect future sales. A failure of a system or software to conform to specifications might constitute a breach of warranty that could result in repair costs, contract termination, refunds of amounts previously paid or claims for damages. Any of these types of errors or failures might have a materially adverse impact on our reputation, business operations and our financial position or results of operations.
17

Table of Contents
McKESSON CORPORATION
We might be impeded in providing customers online services and data access.
We provide remote services that involve hosting customer data and operating software on our own or third party systems. Our customers rely on their ability to access the systems and their data as needed. The networks and hosting systems are vulnerable to interruption or damage from sources beyond our control, such as power loss, telecommunications failures, fire, natural disasters, software and hardware failures and cyberattacks. If the timely delivery of medical care or other customer business requirements are impaired by data access, network or systems problems, we could be exposed to significant claims and reputational harm. Any such problems might have a materially adverse impact on our business operations and our financial position or results of operations.
We might not realize expected benefits from business process initiatives.
We may implement restructuring, cost reduction or other business process initiatives that might result in extraordinary charges and expenses, failures to achieve our desired objectives, or unintended consequences such as distraction of our management and employees, business disruption, attrition beyond any planned reduction in workforce, inability to attract or retain key personnel and reduced employee productivity. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be unable to successfully complete or integrate acquisitions or other business combinations.
Our growth strategy includes consummating acquisitions or other business combinations that either expand or complement our business. To fund acquisitions, we may require financing that may not be available on acceptable terms. We may not receive regulatory approvals needed to complete proposed transactions, or such approvals may be subject to delays or conditions that reduce transaction benefits. Achieving the desired outcomes of business combinations involves significant risks including: diverting management’s attention from other business operations; challenges with assimilating the acquired businesses, such as integration of operations and systems; failure or delay in realizing operating synergies; difficulty retaining key acquired company personnel; unanticipated accounting or financial systems issues with the acquired business, which might affect our internal controls over financial reporting; unanticipated compliance issues in the acquired business; challenges retaining customers of the acquired business; unanticipated expenses or charges to earnings, including depreciation and amortization or potential impairment charges; and risks of known and unknown assumed liabilities in the acquired business. Any of these risks could adversely affect our ability to achieve the anticipated benefits of an acquisition and might have a materially adverse impact on our business operations and our financial position or results of operations.
Exclusive forum provisions in our Bylaws could limit our stockholders’ ability to choose their preferred judicial forum for disputes with us or our directors, officers or employees.
Our amended and restated bylaws provide that, unless the Corporation consents in writing to the selection of an alternative forum, the sole and exclusive forum for specified legal actions is the Court of Chancery of the State of Delaware or the United States District Court for the District of Delaware if the Court of Chancery does not have or declines to accept jurisdiction (collectively, “Delaware Courts”). Current and former stockholders are deemed to have consented to the personal jurisdiction of the Delaware Courts in connection with any action to enforce that exclusive forum provision and to service of process in any such action. These provisions of the bylaws are not a waiver of, and do not relieve anyone of duties to comply with, federal securities laws including those specifying the exclusive jurisdiction of federal courts under the Exchange Act and concurrent jurisdiction of federal and state courts under the Securities Act. To the extent that these provisions of the bylaws limit a current or former stockholder’s ability to select a judicial forum other than the Delaware Courts, they might discourage the specified legal actions, might cause current or former stockholders to incur additional litigation-related expenses and might result in outcomes unfavorable to current or former stockholders. A court might determine that these provisions of the bylaws are inapplicable or unenforceable in any particular action, in which case we may incur additional litigation related expenses in such action, and the action may result in outcomes unfavorable to us, which could have a materially adverse impact on our reputation, our business operations and our financial position or results of operations.
18

Table of Contents
McKESSON CORPORATION
We might be adversely impacted by delays or other difficulties with divestitures.
When we decide to sell assets or a business, we may encounter difficulty in finding buyers or exit strategies on acceptable terms or in a timely manner, which could delay the achievement of our strategic objectives. After the disposition, we might experience greater dissynergies than expected, and the impact of the divestiture on our revenue or profit might be larger than we expected. We might have difficulties with pre-closing conditions such as regulatory and governmental approvals, which could delay or prevent the divestiture. We might have financial exposure in a divested business, such as through minority equity ownership, financial or performance guarantees, indemnities or other obligations, such that conditions outside of our control might negate the expected benefits of the disposition. Any of these risks could adversely affect our ability to achieve the anticipated benefits of a divestiture and might have a materially adverse impact on our business operations and our financial position or results of operations.
We might not realize the expected tax treatment from our split-off of Change Healthcare.
On March 10, 2020, the Company completed a separation of its interest in Change Healthcare LLC (“Change Healthcare JV”). The divestiture was effected through the split-off of PF2 SpinCo, Inc. (“SpinCo”), a wholly owned subsidiary of the Company that held all of the Company’s interest in the Change Healthcare JV, to certain of the Company’s stockholders through an exchange offer (the “Exchange Offer”), followed by a merger of SpinCo with and into Change Healthcare Inc. (“Change”), with Change surviving the merger (the “Merger” and, together with the Exchange Offer, the “Transactions”). The Company received an opinion from outside legal counsel to the effect that the Transactions qualified as generally tax-free transactions to the Company and its shareholders for U.S. federal income tax purposes. An opinion of legal counsel is not binding on the Internal Revenue Service (the “IRS”) or the courts, and the IRS or the courts may not agree with the intended tax-free treatment of the Transactions. In addition, the opinion could not be relied upon if certain assumptions, representations and undertakings upon which the opinion was based are materially inaccurate or incomplete, or are violated in any material respect. If the intended tax-free treatment of the Transactions is not sustained, the Company and its stockholders who participated in the Transactions may be required to pay substantial U.S. federal income taxes. In connection with the Transactions, the Company, SpinCo, Change and the Change Healthcare JV entered into the Tax Matters Agreement, which governs their respective rights, responsibilities and obligations with respect to tax liabilities and benefits, tax attributes, tax contests and other tax sharing regarding U.S. federal, state and local, and non-U.S. taxes, other tax matters and related tax returns. Under the Tax Matters Agreement, Change is required to indemnify the Company if the Transactions become taxable as a result of certain actions by Change or SpinCo, or as a result of certain changes in ownership of the stock of Change after the Merger. If Change does not honor its obligations to indemnify the Company, or if the Transactions fail to qualify for the intended tax-free treatment for reasons not related to a disqualifying action by Change or SpinCo, the resulting tax to the Company could have a significant adverse effect on our financial position or results of operations.
We might be adversely impacted by outsourcing or similar third-party relationships.
We rely on third parties to perform certain business and administrative functions for us. We might not adequately develop, implement and monitor these outsourced service providers, and we might not realize expected cost savings or other benefits. Third-party services providers might fail to perform as anticipated, or we might experience unanticipated operational difficulties, compliance requirements or increased costs related to outsourced services. For example, our ability to use outsourcing resources in certain jurisdictions might be limited by legislative action or customer contracts, with the result that the work must be performed at greater expense or we may be subject to sanctions for non-compliance. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We may be unsuccessful in retail pharmacy operations or maintaining profitability.
Our business strategy included expanding our retail pharmacy operations. Our retail pharmacy operations involve numerous risks, such as the following ones. We might encounter difficulties attracting and retaining customers to our retail locations due to their unfamiliarity with our brands or our inexperience with local market preferences. Competition from our retail pharmacy operations might strain relationships with our retail pharmacy customers. Consolidation of retail pharmacies with third party payers, expansion of large retail pharmacy networks, reductions in reimbursement rates, shifts in the mix of branded and generic pharmaceutical sales, and exclusion from preferred pharmacy networks can impair our retail pharmacy sales and profitability. Failure to maintain profitable retail pharmacy operations may result in significant costs, including those associated with site closures and reductions in workforce. If our retail pharmacy operations fail to achieve, or are unable to sustain, acceptable net sales and profitability levels, it might have a materially adverse impact on our business operations and our financial position or results of operations.
19

Table of Contents
McKESSON CORPORATION
We might be harmed by large customer purchase reductions, payment defaults or contract non-renewal.
We derive a significant portion of our revenue from, and have a significant portion of our accounts receivable with, a small number of customers. At March 31, 2021, sales to our largest customer represented approximately 21% of our consolidated revenues and approximately 19% of our trade receivables, and those of our ten largest customers combined accounted for approximately 51% of our consolidated revenues and approximately 32% of our trade receivables. A material default in payment, reduction in purchases, or the loss of business from a large customer might have a materially adverse impact on our business operations and our financial position or results of operations.
Our contracts with government entities involve future funding and compliance risks.
Our contracts with government entities are subject to risks such as lack of funding and compliance with unique requirements. For example, government contract purchase obligations are typically subject to the availability of funding, which may be eliminated or reduced. In addition, the future volume of products or services purchased by a government customer is uncertain. Our government contracts might not be renewed or might be terminated for convenience with little or no prior notice. Government contracts typically expose us to higher potential liability than do other types of contracts. In addition, government contracts typically are subject to procurement laws that include socio-economic, employment practices, environmental protection, recordkeeping and accounting and other requirements. For example, our contracts with the U.S. government generally require us to comply with the Federal Acquisition Regulations, Procurement Integrity Act, Buy American Act, Trade Agreements Act, and other laws and regulations. We are subject to government audits, investigations and oversight proceedings. Government agencies routinely review and audit government contractors to determine whether they are complying with contractual and legal requirements. If we fail to comply with these requirements, or we fail an audit, we are subject to various sanctions such as monetary damages, criminal and civil penalties, termination of contracts and suspension or debarment from government contract work. These requirements complicate our business and increase our compliance burden. The occurrence of any of these risks could harm our reputation and might have a materially adverse impact on our business operations and our financial position or results of operations.
Our participation in vaccination distribution programs may materially affect our operating results, reputation, and business.
We participate as a distributor in government-sponsored vaccination programs, such as the U.S. government’s COVID-19 distribution program (“Federal COVID-19 Response”). We also provide supplies used for vaccine administration in the Federal COVID-19 Response. Our participation in such programs exposes us to various uncertainties. For example, the novel nature of the SARS-CoV‑2 virus and the broad scope of the ongoing COVID-19 vaccine distribution program introduce uncertainty about what volumes of products may become available for distribution by us, the effectiveness of vaccines, and the cost of distribution. Because of such uncertainties, our operating results may be subject to variability. Our participation in such programs also exposes us to various risks, including regulatory compliance, government oversight, dependence on government funding, contractual performance, litigation, security risks, and supply chain challenges. Any significant problems with our participation in such programs might have a materially adverse impact on our reputation and our business. Because of these risks and uncertainties our operating results may be materially higher or lower than our projections.
We might be harmed by changes in our relationships or contracts with suppliers.
We attempt to structure our pharmaceutical distribution agreements with manufacturers to ensure that we are appropriately and predictably compensated for the services we provide. Certain distribution agreements with manufacturers include pharmaceutical price inflation as a component of our compensation, and we cannot control the frequency or magnitude of pharmaceutical price changes. We might be unable to renew pharmaceutical distribution agreements with manufacturers in a timely and favorable manner. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
20

Table of Contents
McKESSON CORPORATION
We might infringe intellectual property rights or our intellectual property protections might be inadequate.
We believe that our products and services do not infringe the proprietary rights of third parties, but third parties have asserted infringement claims against us and may do so in the future. If a court were to hold that we infringed other’s rights, we might be required to pay substantial damages, develop non-infringing products or services, obtain a license, stop selling or using the infringing products or services, or incur other sanctions. We rely on trade secret, patent, copyright and trademark laws, nondisclosure obligations and other contractual provisions and technical measures to protect our proprietary rights in our products and solutions. We might initiate costly and time-consuming litigation to protect our trade secrets, to enforce our patent, copyright and trademark rights and to determine the scope and validity of the proprietary rights of others. Our intellectual property protection efforts might be inadequate to protect our rights. Our competitors might develop non-infringing products or services equivalent or superior to ours. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be unable to successfully recruit and retain qualified employees.
Our ability to attract, engage, develop and retain qualified and experienced employees, including key executives and other talent, is essential for us to meet our objectives. We compete with many other businesses to attract and retain employees. Competition among potential employers might result in increased salaries, benefits or other employee-related costs, or in our failure to recruit and retain employees. We may experience sudden loss of key personnel due to a variety of causes, such as illness, and must adequately plan for succession of key management roles. Employees might not successfully transition into new roles. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
Industry and Economic Risks
We might be adversely impacted by healthcare reform such as changes in pricing and reimbursement models.
Many of our products and services are designed and intended to function within the structure of current healthcare financing and reimbursement systems. The healthcare industry and related government programs are changing. Some of these changes increase our risks and create uncertainties for our business.
For example, some changes in reimbursement methodologies (including government rates) for pharmaceuticals, medical treatments and related services reduce profit margins for us and our customers and impose new legal requirements on healthcare providers. Those changes have included cuts in Medicare and Medicaid reimbursement levels, changes in the basis for payments, shifting away from fee-for-service and towards value-based payments and risk-sharing models, and increases in the use of managed care.
In the U.S., the Patient Protection and Affordable Care Act (“ACA”) significantly expanded health insurance coverage to uninsured Americans and changed the way healthcare is financed by both governmental and private payers. There are continued efforts to challenge the ACA. There are also efforts to broaden healthcare coverage. U.S. lawmakers also have explored proposals to reduce drug prices, including requiring price transparency and drug importation measures. These proposals might result in significant changes in the pharmaceutical value chain as manufacturers, PBM, managed care organizations and other industry stakeholders look to implement new transactional flows and adapt their business models.
Provincial governments in Canada that provide partial funding for the purchase of pharmaceuticals and independently regulate the sale and reimbursement of drugs have sought to reduce the costs of publicly funded health programs. For example, provincial governments have taken steps to reduce consumer prices for generic pharmaceuticals and, in some provinces, change professional allowances paid to pharmacists by generic manufacturers.
Many European governments provide or subsidize healthcare to consumers and regulate pharmaceutical prices, patient eligibility and reimbursement levels in order to control government healthcare system costs. Some European governments have implemented or are considering austerity measures to reduce healthcare spending. These measures exert pressure on the pricing and reimbursement timelines for pharmaceuticals and may cause our customers to purchase fewer of our products and services or influence us to reduce prices.
21

Table of Contents
McKESSON CORPORATION
Although there is substantial uncertainty about the likelihood, timing and results of these health reform efforts, their implementation might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted by competition and industry consolidation.
Our businesses face a highly competitive global environment with strong competition from international, national, regional and local full-line, short-line and specialty distributors, service merchandisers, self-warehousing chain drug stores, manufacturers engaged in direct distribution, third-party logistics companies and large payer organizations. In addition, our businesses face competition from various other service providers and from pharmaceutical and other healthcare manufacturers as well as other potential customers, which may from time-to-time decide to develop, for their own internal needs, supply management capabilities that might otherwise be provided by our businesses. Due to consolidation, a few large suppliers control a significant share of the pharmaceuticals market. This concentration reduces our ability to negotiate favorable terms with suppliers and causes us to depend on a smaller number of suppliers. Many of our customers, including healthcare organizations, have consolidated and have greater power to negotiate favorable prices. Consolidation by our customers, suppliers and competitors might reduce the number of market participants and give the remaining enterprises greater bargaining power, which might lead to erosion in our profit margin. Consolidation might increase counter-party credit risk because credit purchases increase for fewer market participants. These competitive pressures and industry consolidation might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted by changes or disruptions in product supply.
Our supply arrangements might be interrupted or adversely affected by a variety of causes over which we have no control, such as export controls or trade sanctions, labor disputes, unavailability of key manufacturing sites, inability to procure raw materials, quality control concerns, ethical sourcing issues, supplier’s financial distress, natural disasters, civil unrest or acts of war. Our inventory might be requisitioned, diverted or allocated by government order such as under emergency, disaster and civil defense declarations. For example, government actions in response to the COVID-19 pandemic affect our supply allocation, and those and our own allocation decisions can impact our customer relationships. Changes in the healthcare industry’s or our suppliers’ pricing, selling, inventory, distribution or supply policies or practices could significantly reduce our revenues and net income. We might experience disruptions in our supply of higher margin pharmaceuticals, including generic pharmaceuticals. Any of these changes or disruptions might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted as a result of our distribution of generic pharmaceuticals.
Our generic pharmaceuticals distribution business is subject to pricing risks. We might be adversely impacted if our ClarusONE generic pharmaceutical sourcing joint venture with Walmart, Inc. is unsuccessful or experiences margins declines. Generic drug manufacturers often offer a generic version of branded pharmaceuticals while they challenge the validity or enforceability branded pharmaceutical patents. The patent holder might assert infringement claims against us for distributing those generic versions and the generic drug manufactures may not fully indemnify us against such claims. These risks, as well as changes in the availability, pricing volatility, reimbursement rates for generic drugs, or significant changes in the nature, frequency or magnitude of generic pharmaceutical launches, might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted by an economic slowdown or recession.
An economic slowdown or recession affecting our businesses in one or more regions could reduce the prices our customers are able or willing to pay for our products and services and the volume of their purchases. This risk is increased by the COVID-19 pandemic. Any economic slowdown or recession might have a materially adverse impact on our business operations and our financial position or results of operations.
22

Table of Contents
McKESSON CORPORATION
Disruption or other changes in capital and credit markets might impede access to credit and increase borrowing costs for us and our customers and suppliers and might impair the financial soundness of our customers and suppliers.
Volatility and disruption in global capital and credit markets, including the bankruptcy or restructuring of certain financial institutions, reduced lending activity by financial institutions, or decreased liquidity and increased costs in the commercial paper market, might adversely affect our borrowing ability and cost of borrowing. We generally sell our products and services under short-term unsecured credit arrangements. An adverse change in general economic conditions or access to capital might cause our customers to reduce their purchases from us, or delay or fail paying amounts owed to us. Suppliers might increase their prices, reduce their output or change their terms of sale due to limited availability of credit. Suppliers might be unable to make payments due to us for fees, returned products or incentives. These risks are increased by the COVID-19 pandemic. Interest rate increases or changes in capital market conditions might impede our or our customers’ or suppliers’ ability or cost to obtain credit. Any of these risks might have a material adverse impact on our business operations and our financial position or results of operations.
We may have difficulties in sourcing or selling products due to a variety of causes.
We might experience difficulties and delays in sourcing and selling products due to a variety of causes, such as: difficulties in complying with the legal requirements for export or import of pharmaceuticals or components; suppliers’ failure to satisfy production demand; manufacturing or supply problems such as inadequate resources; and real or perceived quality issues. Difficulties in product manufacturing or access to raw materials could result in supplier production shutdowns, product shortages and other supply disruptions. The FDA banned certain manufacturers from selling raw materials and drug ingredients in the U.S. due to quality issues. The COVID-19 pandemic adversely affects the availability of some products, resulting in product allocation and delivery delays. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted by tax legislation or challenges to our tax positions.
We are subject to the tax laws in the U.S. at the federal, state and local government levels and to the tax laws of many other jurisdictions in which we operate or sell products or services. Tax laws might change in ways that adversely affect our tax positions, effective tax rate and cash flow. The tax laws are extremely complex and subject to varying interpretations. We are subject to tax examinations in various jurisdictions that might assess additional tax liabilities against us. Our tax reporting positions might be challenged by relevant tax authorities, we might incur significant expense in our efforts to defend those challenges, and we might be unsuccessful in those efforts. Developments in examinations and challenges might materially change our provision for taxes in the affected periods and might differ materially from our historical tax accruals. Any of these risks might have a materially adverse impact on our business operations, our cash flows and our financial position or results of operations.
We might be adversely impacted by the Brexit withdrawal of the United Kingdom from the European Union.
We have operations in the U.K. and the European Union (“E.U.”) and face risks associated with the uncertainty and potential disruptions that might follow the U.K. withdrawing from the European Union (“Brexit”). Brexit could adversely affect political, regulatory, economic or market conditions and contribute to instability in global political institutions, regulatory agencies and financial markets. For example, we might experience volatility in exchange rates and interest rates and changes in laws regulating our U.K. operations. Customers might reduce purchases due to the uncertainty caused by Brexit. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We might be adversely impacted by fluctuations in foreign currency exchange rates.
We conduct our business in various currencies, including the U.S. dollar, euro, British pound sterling and Canadian dollar. Changes in foreign currency exchange rates could reduce our revenues, increase our costs or otherwise adversely affect our financial results reported in U.S. dollars. For example, we are exposed to transactional currency exchange risk due to our import and export of products that are purchased or sold in currencies other than the U.S. dollar. We also have currency exchange risk due to intercompany loans denominated in various currencies. The COVID-19 pandemic has affected and might increase currency exchange rate volatility. We may from time to time enter into foreign currency contracts, foreign currency borrowings or other techniques intended to hedge a portion of our foreign currency exchange rate risks. These hedging activities may not completely offset the adverse financial effects of unfavorable movements in foreign currency exchange rates during the time the hedges are in place. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
23

Table of Contents
McKESSON CORPORATION
General Risk Factors
We might be adversely impacted by events outside of our control, such as widespread public health issues, natural disasters, political events and other catastrophic events.
We might be adversely affected by events outside of our control, including: widespread public health issues, such as epidemic or pandemic infectious diseases; natural disasters such as earthquakes, floods or severe weather; political events such as terrorism, military conflicts and trade wars; and other catastrophic events. These events can disrupt operations for us, our suppliers, our vendors, and our customers. For example, in February 2021, a severe winter storm affecting the United States temporarily impacted our distribution business operations, primarily in Texas. They might affect consumer confidence levels and spending. In response to these events, we might suspend operations, implement extraordinary procedures, seek alternate sources for product supply, or suffer consequences that are unexpected and difficult to mitigate. In particular, the rapid and widespread transmission of the SARS-CoV-2 novel coronavirus beginning in late 2019 impacts us in significant ways. For example, to mitigate the spread of the COVID-19 disease caused by SARS-CoV-2, we implemented travel restrictions and remote working arrangements for most of our employees in order to minimize physical contact, and we implemented additional sanitation and personal protection measures in our warehouse, retail pharmacy and delivery operations. These measures might not fully mitigate COVID-19 risks to our workforce and we could experience unusual levels of absenteeism that might impair operations and delay delivery of products. The COVID-19 pandemic affects product manufacturing, supply and transport availability and cost. The pandemic reduces demand for some products due to delays or cancellations of elective medical procedures, consumer self-isolation and business closures, among other reasons. The COVID-19 pandemic influences shortages of some products, with product allocation resulting in delivery delays for customers. The ongoing impacts of the pandemic might cause a general economic slowdown or recession in one or more markets, disruptions and volatility in global capital markets and other broad and adverse effects on the economy, business conditions, commercial activity and the healthcare industry. The pandemic might impact our business operation, financial position and results of operation in unpredictable ways that depend on highly uncertain future developments, such as determining the effectiveness of current or future government actions to address the public health or economic impacts of the pandemic. Any of these risks might have a materially adverse impact on our business operations and our financial position or results of operations.
We may be adversely affected by global climate change or by legal, regulatory or market responses to such change.
The long-term effects of climate change are difficult to predict and may be widespread. The impacts may include physical risks (such as rising sea levels or frequency and severity of extreme weather conditions), social and human effects (such as population dislocations or harm to health and well-being), compliance costs and transition risks (such as regulatory or technology changes) and other adverse effects. The effects could impair, for example, the availability and cost of certain products, commodities and energy (including utilities), which in turn may impact our ability to procure goods or services required for the operation of our business at the quantities and levels we require. We bear losses incurred as a result of, for example, physical damage to or destruction of our facilities (such as distribution or fulfillment centers), loss or spoilage of inventory, and business interruption due to weather events that may be attributable to climate change. These events and impacts could materially adversely affect our business operations, financial position or results of operation.
We might be adversely impacted by changes in accounting standards.
Our consolidated financial statements are subject to the application of U.S. GAAP, which periodically is revised or reinterpreted. From time to time, we are required to adopt new or revised accounting standards issued by recognized authoritative bodies, including the Financial Accounting Standards Board (“FASB”) and the SEC. It is possible that future accounting standards may require changes to the accounting treatment in our consolidated financial statements and may require us to make significant changes to our financial systems. Such changes might have a materially adverse impact on our financial position or results of operations.
Item 1B.    Unresolved Staff Comments.
None.
24

Table of Contents
McKESSON CORPORATION
Item 2.    Properties.
Because of the nature of our principal businesses, our plant, warehousing, retail pharmacies, office and other facilities are operated in widely dispersed locations, primarily throughout North America and Europe. Retail pharmacies and most warehouses are typically owned or leased on a long-term basis. We consider our operating properties to be in satisfactory condition and adequate to meet our needs for the next several years without making capital expenditures materially higher than historical levels. Information as to material lease commitments is included in Financial Note 11, “Leases,” to the consolidated financial statements appearing in this Annual Report on Form 10-K.
Item 3.    Legal Proceedings.
Certain legal proceedings in which we are involved are discussed in Financial Note 19, “Commitments and Contingent Liabilities,” to the consolidated financial statements appearing in this Annual Report on Form 10-K. Disclosure of an environmental proceeding where a governmental agency is a party generally is included only if we expect monetary sanctions in the proceeding to exceed $1 million, unless otherwise material.
Item 4.    Mine Safety Disclosures.
Not applicable.
25

Table of Contents
McKESSON CORPORATION
Information about our Executive Officers
The following table sets forth information regarding the executive officers of the Company, including their principal occupations during the past five years. The number of years of service with the Company includes service with predecessor companies.
There are no family relationships between any of the executive officers or directors of the Company. The executive officers are elected on an annual basis generally and their term expires at the first meeting of the Board of Directors (“Board”) following the annual meeting of stockholders, or until their successors are elected and have qualified, or until death, resignation, or removal, whichever is sooner.
NameAgePosition with Registrant and Business Experience
Brian S. Tyler54Chief Executive Officer since April 2019; President and Chief Operating Officer from August 2018 to March 2019; Chairman of the Management Board of McKesson Europe AG from 2017 to 2018; President and Chief Operating Officer, McKesson Europe from 2016 to 2017; President of North America Distribution and Services from 2015 to 2016; Executive Vice President, Corporate Strategy and Business Development from 2012 to 2015; and a director since April 2019. Service with the Company - 24 years.
Britt J. Vitalone52Executive Vice President and Chief Financial Officer since January 2018; Senior Vice President and Chief Financial Officer, U.S. Pharmaceutical from July 2014 to December 2017; Senior Vice President and Chief Financial Officer, U.S. Pharmaceutical and Specialty Health from October 2017 to December 2017; Senior Vice President of Corporate Finance and M&A Finance from March 2012 to June 2014. Service with the Company - 15 years.
Tracy Faber51Executive Vice President and Chief Human Resources Officer since October 2019. Previously, Senior Vice President of Human Resources. Service with the Company - 10 years.
Nancy Flores54Executive Vice President, Chief Information Officer and Chief Technology Officer since January 2020; Chief Information Officer, Johnson Controls from 2018 to July 2019. Corporate Officer and Vice President of Business and Technology Services, Abbott Laboratories from 1996 to 2018. Service with the Company - 1 year.
Tom Rodgers50Executive Vice President, Chief Strategy Officer since June 2020. Previously Senior Vice President and Managing Director of McKesson Ventures from 2014-2020. Service with the Company - 7 years.
Lori A. Schechter59Executive Vice President, Chief Legal Officer and General Counsel since June 2014; Associate General Counsel from January 2012 to June 2014; Litigation Partner, Morrison & Foerster LLP from 1995 to December 2011. Service with the Company - 9 years.

26

Table of Contents
McKESSON CORPORATION
PART II
Item 5.    Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
Market Information: The principal market on which our common stock is traded is the New York Stock Exchange (“NYSE”) under the trading symbol of “MCK.”
Holders: The number of record holders of our common stock at March 31, 2021 was approximately 4,841.
Dividends: In July 2020, our quarterly dividend was raised from $0.41 to $0.42 per common share for dividends declared on or after such date by the Board. We declared regular cash dividends of $1.67 and $1.62 per share in the years ended March 31, 2021 and 2020, respectively.
We anticipate that we will continue to pay quarterly cash dividends in the future. However, the payment and amount of future dividends remain within the discretion of the Board and will depend upon our future earnings, financial condition, capital requirements, and other factors.
Securities Authorized for Issuance under Equity Compensation Plans: Information relating to this item is provided under Part III, Item 12, to this Annual Report on Form 10-K.
Share Repurchase Plans: Stock repurchases may be made from time-to-time in open market transactions, privately negotiated transactions, through accelerated share repurchase (“ASR”) programs, or by combinations of such methods, any of which may use pre-arranged trading plans that are designed to meet the requirements of Rule 10b5-1(c) of the Securities Exchange Act of 1934. The timing of any repurchases and the actual number of shares repurchased will depend on a variety of factors, including the Company’s stock price, corporate and regulatory requirements, restrictions under the Company’s debt obligations, and other market and economic conditions.
During the last three years, our share repurchases were transacted through both open market transactions and ASR programs with third-party financial institutions.
27

Table of Contents
McKESSON CORPORATION
Share Repurchases (1)
(In millions, except price per share data)
Total
Number of
Shares
Purchased (2)
Average Price
Paid Per Share
Approximate
Dollar Value of
Shares that May
Yet Be Purchased
Under the
Programs
Balance, March 31, 2018$1,096 
Shares repurchase plans authorized in May 20184,000 
Shares repurchased - Open market10.4 $132.14 (1,377)
Shares repurchased - ASR2.1 $117.98 (250)
Balance, March 31, 20193,469 
Shares repurchased - Open market9.2 $144.68 (1,334)
Shares repurchased - ASR4.7 $127.68 (600)
Balance, March 31, 20201,535 
Shares repurchase plans authorized in January 20212,000 
Shares repurchased - Open market (3)
4.7 $160.33 (750)
Balance, March 31, 2021$2,785 
(1)This table does not include the value of equity awards surrendered to satisfy tax withholding obligations. It also excludes shares related to our Split-off of the Change Healthcare JV as described in Financial Note 20, “Stockholders' Equity” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K.
(2)The number of shares purchased reflects rounding adjustments.
(3)$8 million was accrued within “Other accrued liabilities” on our Consolidated Balance Sheet as of March 31, 2021 for share repurchases that were executed in late March and settled in early April.
In 2019, we retired 5.0 million or $542 million of our treasury shares previously repurchased. Under the applicable state law, these shares resume the status of authorized and unissued shares upon retirement. In accordance with our accounting policy, we allocate any excess of share repurchase price over par value between additional paid-in capital and retained earnings. Accordingly, our retained earnings and additional paid-in capital were reduced by $472 million and $70 million, respectively, during 2019.
The following table provides information on our share repurchases during the fourth quarter of 2021:
Share Repurchases (1)
(In millions, except price per share)
Total
Number of Shares
Purchased
Average Price Paid per ShareTotal Number of Shares Purchased as Part of Publicly Announced ProgramsApproximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
January 1, 2021 - January 31, 20210.4 $181.50 0.4 $2,958 
February 1, 2021 - February 28, 20210.4 180.56 0.4 2,880 
March 1, 2021 - March 31, 20210.5 184.68 0.5 2,785 
Total
1.3 1.3 
(1)This table does not include the value of equity awards surrendered to satisfy tax withholding obligations.

28

Table of Contents
McKESSON CORPORATION
Stock Price Performance Graph*: The following graph compares the cumulative total stockholder return on our common stock for the periods indicated with the Standard & Poor’s 500 Index and the S&P 500 Health Care Index. The S&P 500 Health Care Index was selected as a comparator because it is generally available to investors and broadly used by other companies in the same industry.
mck-20210331_g2.jpg
March 31,
201620172018201920202021
McKesson Corporation$100.00 $95.30 $91.37 $75.92 $89.37 $131.03 
S&P 500 Index$100.00 $117.17 $133.57 $146.25 $136.05 $212.71 
S&P 500 Health Care Index
$100.00 $111.59 $124.17 $142.66 $141.21 $189.28 
* Assumes $100 invested in McKesson Common Stock and in each index on March 31, 2016 and that all dividends are reinvested.
Item 6.    Reserved.
Item 7.    Management’s Discussion and Analysis of Financial Condition and Results of Operations.
GENERAL
Management’s discussion and analysis of financial condition and results of operations, referred to as the “Financial Review,” is intended to assist the reader in the understanding and assessment of significant changes and trends related to the results of operations and financial position of McKesson Corporation together with its subsidiaries (collectively, the “Company,” “McKesson,” “we,” “our,” or “us” and other similar pronouns). This discussion and analysis should be read in conjunction with the consolidated financial statements and accompanying financial notes in Item 8 of Part II of this Annual Report on Form 10-K.
Our fiscal year begins on April 1 and ends on March 31. Unless otherwise noted, all references to a particular year shall mean our fiscal year.
Certain statements in this report constitute forward-looking statements. See Item 1 - Business - Forward-Looking Statements in Part I of this Annual Report on Form 10-K for additional factors relating to these statements and Item 1A - Risk Factors in Part I of this Annual Report on Form 10-K for a list of certain risk factors applicable to our business, financial condition, and results of operations.
29

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Overview of Our Business:
We are a global leader in healthcare supply chain management solutions, retail pharmacy, community oncology and specialty care, and healthcare information solutions. We partner with life sciences companies, manufacturers, providers, pharmacies, governments, and other healthcare organizations to help provide the right medicines, medical products, and healthcare services to the right patients at the right time, safely, and cost-effectively.
We implemented a new segment reporting structure commencing with the second quarter of 2021, which resulted in four reportable segments: U.S. Pharmaceutical, International, Medical-Surgical Solutions, and Prescription Technology Solutions (“RxTS”). Other, for retrospective periods presented, consists of our equity method investment in Change Healthcare LLC (“Change Healthcare JV”), which was split-off from McKesson in the fourth quarter of 2020. All prior segment information has been recast to reflect our new segment structure and current period presentation. Our organizational structure also includes Corporate, which consists of income and expenses associated with administrative functions and projects, and the results of certain investments. The factors for determining the reportable segments include the manner in which management evaluates the performance of the Company combined with the nature of individual business activities. We evaluate the performance of our operating segments on a number of measures, including revenues and operating profit before interest expense and income taxes.
The following summarizes our four reportable segments and the changes made to our reporting structure commencing in the second quarter of 2021. Refer to Financial Note 22, “Segments of Business,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for further information regarding our reportable segments.
U.S. Pharmaceutical, previously the U.S. Pharmaceutical and Specialty Solutions reportable segment, continues to distribute branded, generic, specialty, biosimilar, and over-the-counter pharmaceutical drugs and other healthcare-related products. This segment also provides practice management, technology, clinical support, and business solutions to community-based oncology and other specialty practices. In addition, the segment sells financial, operational, and clinical solutions to pharmacies (retail, hospital, alternate site) and provides consulting, outsourcing, technological, and other services.
International is a new reportable segment that includes our operations in Europe and Canada, bringing together non-U.S.-based drug distribution services, specialty pharmacy, retail, and infusion care services. McKesson Europe was previously reflected as the European Pharmaceutical Solutions reportable segment and McKesson Canada was previously included in Other.
Medical-Surgical Solutions provides medical-surgical supply distribution, logistics, and other services to healthcare providers in the United States (“U.S.”) and was unaffected by the segment realignment.
RxTS is a new reportable segment that brings together existing businesses, including CoverMyMeds, RelayHealth, RxCrossroads, and McKesson Prescription Automation, including Multi-Client Central Fill as a Service, to serve our biopharma and life sciences partners and patients. RxCrossroads was previously included in our former U.S. Pharmaceutical and Specialty Solutions reportable segment and CoverMyMeds, RelayHealth, and McKesson Prescription Automation were previously included in Other.
30

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Executive Summary:
The following summary provides highlights and key factors that impacted our business, operating results, financial condition, and liquidity for the year ended March 31, 2021.
Coronavirus disease 2019 (“COVID-19”) impacted our results of operations for the year ended March 31, 2021. Following the declaration of COVID-19 as a global pandemic by the World Health Organization (“WHO”) on March 11, 2020, there was a temporary increase in demand for pharmaceuticals across our businesses. Subsequently, pharmaceutical distribution volumes decreased during the first quarter as a result of the weakened and uncertain global economic environment and COVID-19 restrictions, including government shutdowns and shelter-in-place orders. The recovery from the COVID-19 pandemic continued to fluctuate throughout our fiscal year. We benefited from demand for COVID-19 tests, favorable contributions from our vaccine and related ancillary supply kit distribution programs as discussed further below, and savings from reduced travel and meetings throughout 2021;
We expanded our existing contractual relationship with the Centers for Disease Control and Prevention (“CDC”) through an amendment to our existing Vaccines for Children Program contract to support the U.S. government as a centralized distributor of COVID-19 vaccines and ancillary supplies needed to administer vaccines. We have also partnered with the Department of Health and Human Services (“HHS”) and Pfizer to manage the assembly and distribution of the ancillary supplies needed to administer COVID-19 vaccines;
In December 2020, we began distributing certain COVID-19 vaccines under the direction of the CDC. Through the end of the fiscal year, we had distributed approximately 100 million of COVID-19 vaccine doses. For a more in-depth discussion of how COVID-19 impacted our business, operations, and outlook, refer to the COVID-19 section of "Trends and Uncertainties" included below;
Revenues of $238.2 billion, reflects a 3% increase from the prior year primarily in our U.S. Pharmaceutical segment driven by market growth;
Gross profit increased 1% from the prior year primarily in our Medical-Surgical Solutions segment driven by sales of COVID-19 tests;
Total operating expenses in 2021 includes the following:
a charge of $8.1 billion related to our estimated liability for opioid-related claims as further described in the Opioid-Related Litigation and Claims section of “Trends and Uncertainties” included below; and
charges of $115 million to impair certain long-lived assets within our International segment; partially offset by
a net gain of $131 million recorded in connection with insurance proceeds received from the settlement of the shareholder derivative action related to our controlled substances monitoring program;
Other income, net in 2021 includes net gains of $133 million related to our equity investments;
Diluted loss per common share from continuing operations attributable to McKesson Corporation in 2021 of $28.26 reflects the aforementioned items, net of any respective tax impacts, and a lower share count compared to the prior year driven largely by the separation of our investment in Change Healthcare JV on March 10, 2020;
On November 1, 2020, we completed the contribution of our German pharmaceutical wholesale business to a newly formed joint venture with Walgreens Boots Alliance (“WBA”) in which we have a 30% ownership interest;
On December 3, 2020, we completed a public offering of 0.90% Notes due December 3, 2025 (the “2025 Notes”) in a principal amount of $500 million and repaid $1.0 billion of long-term debt in 2021. Refer to Financial Note 13, “Debt and Financing Activities,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for more information;
We returned $1.0 billion of cash to shareholders through $770 million of common stock repurchases, including the value of equity awards surrendered for tax withholding, and $276 million of dividend payments during 2021. On July 29, 2020, we raised our quarterly dividend from $0.41 to $0.42 per common share; and
In January 2021, our Board of Directors (the “Board”) approved an increase of $2.0 billion for the authorized share repurchase of McKesson’s common stock.
31

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Trends and Uncertainties:
COVID-19
In December 2019, a novel strain of coronavirus, which causes the infectious disease known as COVID-19, was reported in Wuhan, China. The WHO declared COVID-19 a “Public Health Emergency of International Concern” on January 30, 2020 and a global pandemic on March 11, 2020.
We continue to evaluate the nature and extent of the impacts COVID-19 has on our business and operations. The pandemic developed rapidly during our fourth quarter of 2020 and continued to evolve throughout 2021. Infection rates varied throughout our fiscal year, peaking in January 2021. A significant number of new COVID-19 cases continue to be reported, particularly in the U.S. These also include cases from new and emerging COVID-19 variants, which could have the potential to be more severe, spread more easily, require different treatments, or change the effectiveness of current vaccines. However, vaccines which have met the U.S. Food and Drug Administration’s (“FDA’s”) standards for safety, effectiveness, and manufacturing quality needed to support Emergency Use Authorization (“EUA”), are currently being administered across the country, as further discussed below. As of March 31, 2021, nearly 154 million doses of COVID-19 vaccines have been administered in the U.S. according to the CDC. The full extent to which COVID-19 will impact us depends on many factors and future developments, which are described at the end of this COVID-19 section.
In response to the COVID-19 pandemic, federal, state, and local government directives and policies have been put in place in the U.S. to enhance availability of medications and supplies to meet the increased demand, assist front-line healthcare providers, manage public health concerns by creating social distancing, and address the economic impacts, including sharply reduced business activity, increased unemployment, and overall uncertainty presented by this healthcare emergency. Similar governmental actions have occurred in Canada and Europe, the timing of which has varied across geographies. In December 2020, the FDA issued an EUA for the Pfizer-BioNTech COVID-19 vaccine manufactured by Pfizer, Inc. (“Pfizer Vaccine”) and the Moderna COVID-19 vaccine manufactured by ModernaTX, Inc. (“Moderna Vaccine”) to be distributed in the U.S. These authorizations were followed by an EUA for the Janssen COVID-19 vaccine manufactured by Janssen Biotech Inc., a Janssen pharmaceutical company of Johnson & Johnson, (“Janssen Vaccine”) in February 2021. Government-coordinated administrative or allocation decisions at the federal, state, and local levels may cause variability in the timing and volume of COVID-19 vaccine distribution and administration activities. Our role in the distribution of COVID-19 vaccines in the U.S. as well as the assembly and distribution of related ancillary supply kits is discussed further below. Similar COVID-19 vaccine authorizations have occurred in Canada and Europe. McKesson Canada’s corporately owned retail pharmacy chain, Rexall, as well as independent pharmacy banners are supporting Canada’s vaccination efforts. McKesson Europe is also playing a role in helping support governments and public health entities in not only distributing COVID-19 vaccines across several European countries, but administering them in pharmacies as well.
As a global leader in healthcare supply chain management solutions, retail pharmacy, community oncology and specialty care, and healthcare information solutions, we are well positioned to respond to the COVID-19 pandemic in the U.S., Canada, and Europe. We have worked and continue to work closely with national and local governments, agencies, and industry partners to ensure that available supplies, including personal protective equipment (“PPE”), and medicine reach our customers and patients.
32

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Our Response to COVID-19 in the Workplace
During this unprecedented time, we are committed in continuing to supply our customers and protect the safety of our employees. The various responses we put in place to mitigate the impact of COVID-19 on our business operations, including telecommuting and work-from-home policies, restricted travel, employee support programs, and enhanced safety measures, are intended to limit employee exposure to the virus that causes COVID-19. We expanded employee medical benefits covering COVID-19 related visits, treatments, and testing as well as expanded telehealth options to protect employee safety. We provided further support including additional emergency leave and an internal paid time off donation platform for employees impacted by COVID-19. For employees whose roles require presence at our facilities, we enhanced safety by promoting the practice of social distancing, providing reminders to wash or disinfect hands and avoid unnecessary face touching, making face masks available, placing hand sanitizers within our operating environments, and periodically cleaning and disinfecting our facilities. For employees whose roles do not require presence at our facilities, we added technology resources to support their working remotely. These responses were initially put in place during our fourth quarter of 2020. During the second quarter of 2021, we also implemented on-site workplace temperature screening as we continue to adapt our health and safety practices in response to the COVID-19 pandemic. When working in frozen vaccine storage environments, employees are provided with protective gear, including special clothing, gloves, and facial gear. These steps to protect employee safety have resulted in limited disruption from COVID-19 to our normal business operations, productivity trends, and have not materially impacted our operating expenses or operating margins.
We have evaluated the impact of our telecommuting and work-from-home policies on our system of internal controls and we have concluded that these policies did not have a material effect on our internal control over financial reporting during the year ended March 31, 2021. We also took various actions to mitigate the impact of COVID-19 on our results from operations through cost-containment and payroll-related expenses.
Trends in our Business
At the onset of the COVID-19 pandemic late in our fourth quarter of 2020, we experienced higher pharmaceutical distribution volumes and increased retail pharmacy foot traffic as our customers increased supplies on hand in March, which drove unfavorability in our results of operations when comparing 2021 versus 2020.
During the first quarter of 2021, we experienced growth in pharmaceutical distribution and specialty drug volumes at a lower rate in the U.S., while pharmaceutical distribution volumes decreased in Europe and Canada due to the COVID-19 pandemic, as compared to the same prior year period. Specialty drug volumes increased, but were negatively impacted by lower demand for elective specialty drugs, as compared to the same prior year period. We also experienced decreased demand for primary care medical-surgical supplies due to deferrals in elective procedures in hospitals and surgery centers as well as decreased traffic and closures of doctors’ offices, which was partially offset by demand for PPE and COVID-19 tests. Additionally, the decreased traffic in doctors’ offices and general shelter-in-place guidance by governmental authorities negatively impacted retail pharmacy foot traffic in both Europe and Canada.
While we experienced improvements in prescription volumes and primary care patient visits during our second quarter of 2021, the impact and recovery of COVID-19 for the second half of our fiscal year was non-linear and tracked with patient mobility. We also saw increased demand for COVID-19 tests and continued sales of PPE throughout the year in our Medical-Surgical Solutions segment partially offset by the impacts of social distancing measures which resulted in a less severe cough, cold, and flu season, savings for reduced travel and meetings across the enterprise, as well as improvements of retail pharmacy foot traffic in Europe and Canada. The vaccine and related ancillary kit distribution in the U.S. favorably impacted our results in the second half of fiscal 2021 as further discussed below.
33

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Our Role in the Distribution of COVID-19 Vaccines and Ancillary Supply Kits
On August 14, 2020, we expanded our contractual relationship with the CDC through an amendment to our existing Vaccines for Children Program contract for the distribution of certain COVID-19 vaccines. The COVID-19 vaccine distribution agreement with the CDC was finalized during the third quarter of 2021. We support the U.S. government as a centralized distributor of COVID-19 vaccines and ancillary supplies needed to administer vaccines. In the centralized model, the U.S. government directs us on the distribution of the vaccines and related supplies to point-of-care sites across the country. We make no decisions on where products are to be distributed nor how the products are allocated between the various provider sites and ultimately administered to the individuals receiving a vaccine. We utilize our expertise and capabilities to support the CDC’s efforts to vaccinate everyone in the U.S. who wants to receive a COVID-19 vaccine. The CDC and McKesson collaborated similarly in response to the 2009 H1N1 pandemic.
In December 2020, we began distributing the Moderna Vaccine in the U.S. and in March 2021, we began distributing the Janssen Vaccine. We may distribute other future authorized COVID-19 vaccines that are refrigerated or frozen. Ancillary supply kits may be shipped either together with the Moderna Vaccine and Janssen Vaccine or in advance of the vaccines. The results of operations related to our vaccine distribution are reflected in our U.S. Pharmaceutical segment. The Pfizer Vaccine, which is ultra-frozen, is not being distributed by McKesson, although we are providing ancillary supplies needed for its administration.
On September 23, 2020, we announced our contract with the HHS under which our Medical-Surgical Solutions segment manages the assembly and distribution of ancillary supply kits needed to administer COVID-19 vaccines, including sourcing some of those supplies. We also have an agreement with Pfizer to assemble and distribute ancillary supply kits needed to administer that particular COVID-19 vaccine. Ancillary supply kits include alcohol prep pads, face shields, surgical masks, needles and syringes, and other vaccine administration items. For the Pfizer Vaccine, ancillary supply kits also include the diluent needed to administer the ultra-frozen vaccine. We began assembling the ancillary supply kits in September 2020 in preparation for vaccine authorization and subsequent distribution. Ancillary supply kits to administer the Pfizer Vaccine are shipped directly to point-of-care sites, and all other ancillary supply kits are shipped to our dedicated vaccine distribution centers. The results of operations for the kitting and distribution of ancillary supplies are reflected in our Medical-Surgical Solutions segment. The future financial impact of the arrangements with the CDC and HHS depend on numerous uncertainties, which are described at the end of this COVID-19 section.
To manage the COVID-19 vaccine and ancillary supply kit distribution, we have set up special, dedicated vaccine distribution centers that include large-scale, custom freezers and refrigerators to safely store and process millions of vaccine doses. These facilities can scale to meet the demand of increasing volumes of vaccines being manufactured. We have also set up distribution centers for kitting and inventory management as part of our contract with the HHS. We are working with delivery partners to manage the delivery of vaccines and ancillary supply kits from our centralized vaccine distribution centers to point-of-care destinations as directed by the CDC. The capital expenditures we made during 2021 to prepare for vaccine and ancillary supply kit distribution were not material to our financial condition or liquidity.
34

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Impact to our Results of Operations, Financial Condition, and Liquidity
For the year ended March 31, 2021, the demand for COVID-19 tests, the year over year impact from PPE and other related products, net of inventory charges, as well as the kitting and distribution of ancillary supplies for COVID-19 vaccines in our Medical-Surgical Solutions segment contributed approximately 20% in segment revenues and segment operating profit. Additionally, the distribution of COVID-19 vaccines in our U.S. Pharmaceutical segment contributed approximately 2% in segment operating profit for the year ended March 31, 2021. During our fourth quarter of 2020, we experienced a temporary increase in demand for pharmaceuticals. Subsequently, during the first quarter, we had lower pharmaceutical volumes, specialty drug volumes, and patient care visits that negatively impacted our consolidated revenues and income (loss) from continuing operations before income taxes for the year ended March 31, 2021. During the year ended March 31, 2021, selling, distribution, general, and administrative expenses decreased as a result of the pandemic, largely due to savings from restricted travel and decreased meetings. The favorable reduction in selling, distribution, general, and administrative expenses was partially offset by increased costs of transport, costs for enhanced procedures to sanitize operating facilities, and costs of providing PPE and other related products for employee use. Additionally, increased costs for certain PPE compressed our margins. Certain PPE items held for resale were valued in our inventory at costs that were inflated by earlier COVID-19 pandemic demand levels. That inventory valuation, if not supported by market resale prices, may be written down to net realizable value. We may also write-off inventory due to decreased customer demand and excess inventory. During the year ended March 31, 2021, we recorded charges totaling $136 million in cost of sales on certain PPE and other related products due to inventory impairments and excess inventory in our Medical-Surgical Solutions segment. Although market price volatility and changes to anticipated customer demand may require additional write-downs in future periods, we are taking measures to mitigate such risk. Overall, these COVID-19 related items had a net favorable impact on consolidated income (loss) from continuing operations before income taxes for the year ended March 31, 2021 compared to the prior year. Impacts to future periods due to COVID-19 may differ based on future developments, which is described at the end of this COVID-19 section.
We were able to maintain appropriate labor and overall vendor supply levels during the year ended March 31, 2021. Our inventory levels have fluctuated in response to supply availability and customer demand patterns for certain products, with varying inventory level impacts depending on the specific product within our portfolio. We collaborated closely with the federal government and other healthcare stakeholders to source more critical PPE to the U.S. This collaboration expedited the shipment of critical medical supplies to areas hit hardest by COVID-19, as identified by the Federal Emergency Management Agency. As our supply levels improve, and the federal government evolves guidance on the prioritization of providers or geographic markets, we will continue to adapt our distribution policies.
On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) to address the economic impact of the COVID-19 pandemic. Among other things, the CARES Act provides certain changes to tax laws and includes provisions to provide relief for citizens, companies, healthcare providers and patients, and others. We have deferred certain employer payroll taxes and continue to monitor the potential impact of other tax legislation changes as result of the CARES Act, including refundable payroll tax credits on certain qualified wages. We anticipate changes due to the CARES Act in the timing of certain cash flows, with no material impact to our financial results for the year ended March 31, 2021. On December 27, 2020, the U.S. government enacted the Consolidated Appropriations Act, 2021 (the “CA Act”), which enhances and expands certain provisions of the CARES Act. The CA Act did not have a material impact on our financial condition, results of operations, or liquidity for the year ended March 31, 2021 nor do we currently expect a material impact on our future financial results.
Our consolidated balance sheets and ability to maintain financial liquidity remains strong. We have experienced no material impacts to our liquidity or net working capital due to the COVID-19 pandemic. We are monitoring our customers closely for changes to their timing of payments or ability to pay amounts owed to us as a result of COVID-19 pandemic impacts to their businesses. We remain well-capitalized with access to liquidity from our revolving credit facility. Long-term debt markets and commercial paper markets, our primary sources of capital after cash flow from operations, have remained open and accessible to us during the COVID-19 pandemic. At March 31, 2021, we were in compliance with all debt covenants, and believe we have the ability to continue to meet our debt covenants in the future.
35

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Impact to our Supply Chain
We also continue to monitor the COVID-19 pandemic impacts on our supply chain. Although the availability of various products is dependent on our suppliers, their locations, and the extent to which they are impacted by the COVID-19 pandemic, we are proactively working with manufacturers, industry partners, and government agencies to meet the needs of our customers during the pandemic. We have assembled a Critical Care Drug Task Force, made up of our procurement specialists, clinical health systems pharmacists, and supply chain professionals, that is focused on securing additional product where available, sourcing back-up products, and protecting our operations across all locations and facilities. We are also working with manufacturers through several channels, including our ClarusONE Sourcing Services LLP (“ClarusONE”) and global sourcing teams in London, and our leaders are actively engaged in addressing potential shortages. We have engaged with industry partners and government agencies to gain visibility into supply and demand. Additionally, we have a robust Business Continuity and Disaster Recovery Program (“BCRP”) and we have proactively enhanced our BCRP in response to the COVID-19 pandemic to protect the supply chain to minimize disruption in healthcare, protect our customers, ensure the safety and security of our employees and workplaces, and ensure the continuity of critical business processes.
The situation remains fluid and we are taking a proactive approach to protect inventory during this crisis and ensure our provider partners have needed supplies and medications to help prevent the spread of the disease and treat those that are ill. COVID-19 has put an unprecedented strain on the supply of high-demand PPE, including N95 masks, gloves, as well as disinfecting sprays and wipes. The supply chain has improved over the initial impact of pandemic-related demand, and we continue to closely monitor demand by customer type and certain PPE and infection prevention items are still in short supply. Our allocation approach has helped us avoid stock outs in many critical product categories, allowing us to provide PPE supplies to many more customers for a much longer time. We anticipate these market conditions will remain for the foreseeable future. Our efforts to help the supply chain have included sourcing products from new suppliers all over the world, working closely with the federal government to help with the nation’s response and collaborating with partners to source, develop, and deliver new products to market.
Risks and Forward-Looking Information
The COVID-19 pandemic has disrupted the global economy and exacerbated uncertainties inherent in estimates, judgments, and assumptions used in our forecasts. We face numerous uncertainties in estimating the direct and indirect effects of COVID-19 on our future business operations, financial condition, results of operations, and liquidity. The full extent to which COVID-19 will impact us depends on many factors and future developments, including: the duration and spread of the virus; governmental actions to limit the spread of the virus; potential seasonality of viral outbreaks; potential new strains or variants of the original virus; the amount of COVID-19 vaccines authorized, manufactured, distributed, and administered; the amount of ancillary supply kits assembled and distributed; the effectiveness of COVID-19 vaccines and governmental measures in controlling the spread of the virus; and the effectiveness of treatments of infected individuals. Due to several rapidly changing variables related to the COVID-19 pandemic, estimations of future economic trends and the timing of when stability will return remains challenging. Additionally, we periodically review our intangible and other long-lived assets for impairment when events or changes in circumstances indicate the carrying value may not be recoverable. Key assumptions and estimates about future values in our impairment assessments can be affected by a variety of factors, including the impacts of the global pandemic on industry and economic trends as well as on our business strategy and internal forecasts. Material changes to key assumptions and estimates can decrease the projected cash flows or increase the discount rates and have resulted in impairment charges of certain long-lived assets as disclosed in Financial Note 4, “Restructuring, Impairment, and Related Charges,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K, and could potentially result in future impairment charges. Refer to Item 1A - Risk Factors in Part I of this Annual Report on Form 10-K for a disclosure of risk factors related to COVID-19.
36

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Opioid-Related Litigation and Claims
We are a defendant in approximately 3,200 legal proceedings asserting claims related to the distribution of controlled substances (opioids) in federal and state courts throughout the U.S., and in Puerto Rico and Canada. Those proceedings include approximately 2,900 federal cases and approximately 300 state court cases throughout the U.S., and cases in Puerto Rico and Canada. We continue to be involved in discussions with the objective of achieving broad resolution of opioid-related claims of states, their political subdivisions and other government entities (“governmental entities”). We are in ongoing, advanced discussions with state attorneys general and plaintiffs’ representatives regarding a framework under which, in order to resolve the claims of governmental entities, the three largest U.S. pharmaceutical distributors would pay up to approximately $21.0 billion over a period of 18 years, with up to approximately $8.0 billion to be paid by us, of which more than 90% is anticipated to be used to remediate the opioids crisis. Most of the remaining amount relates to plaintiffs’ attorneys fees and costs, and would be payable over a shorter time period. In addition, the proposed framework would require the three distributors, including the Company, to adopt changes to anti-diversion programs.
We have concluded that discussions under that framework have reached a stage at which a broad settlement of opioid claims by governmental entities is probable, and the loss related thereto can be reasonably estimated as of March 31, 2021. As a result of that conclusion, and our assessment of certain other opioid-related claims, we recorded a charge of $8.1 billion for the year ended March 31, 2021 within “Claims and litigation charges, net” in our Consolidated Statement of Operations, related to our share of the settlement framework described above, as well as other opioid-related claims. Because of the many uncertainties associated with any potential settlement arrangement or other resolution of opioid-related litigation, including the uncertainty of the scope of participation by plaintiffs in any potential settlement, we are not able to reasonably estimate the upper or lower ends of the range of ultimate possible loss for all opioid-related litigation matters. In light of the uncertainty of the timing of amounts that would be paid with respect to the charge, the charge was recorded in “Long-term litigation liabilities” in our Consolidated Balance Sheet as of March 31, 2021. Moreover, in light of this uncertainty, the amount of any ultimate loss may differ materially from the amount accrued.
While we continue to be involved in discussions regarding a potential broad settlement framework, we also continue to prepare for trial in these pending matters. We believe that we have valid defenses to the claims pending against us and, absent an acceptable settlement, intend to vigorously defend against all such claims. An adverse judgment or negotiated resolution in any of these matters could have a material adverse impact on our financial position, cash flows or liquidity, or results of operations. Refer to Financial Note 19, “Commitments and Contingent Liabilities,” to the accompanying consolidated financial statements included in this Annual Report on Form 10‑K for more information.
State Opioid Statutes
Legislative, regulatory, or industry measures to address the misuse of prescription opioid medications could affect our business in ways that we may not be able to predict. In April 2018, the State of New York adopted the Opioid Stewardship Act (“OSA”) which required the imposition of an annual surcharge on all manufacturers and distributors licensed to sell or distribute opioids in New York. On December 19, 2018, the U.S. District Court for the Southern District of New York found the law unconstitutional and issued an injunction preventing the State of New York from enforcing the law. The State of New York appealed to the U.S. Court of Appeals for the Second Circuit. The State of New York has subsequently adopted an excise tax on sales of opioids in the State, which became effective July 1, 2019. The law adopting the excise tax made clear that the OSA would apply only to opioid sales on or before December 31, 2018. The excise tax applies only to the first sale occurring in New York, and thus may not apply to sales from our distribution centers in New York to New York customers.
On September 14, 2020, a panel of the U.S. Court of Appeals for the Second Circuit reversed the district court’s decision on procedural grounds. The Healthcare Distribution Alliance filed a petition for panel rehearing, or, in the alternative, for rehearing en banc with the U.S. Court of Appeals for the Second Circuit; that petition was denied on December 18, 2020. On February 12, 2021, the U.S. Court of Appeals for the Second Circuit granted a motion by the Healthcare Distribution Alliance to stay its mandate pending the filing and disposition of a petition for writ of certiorari before the U.S. Supreme Court. The due date for filing such a petition is May 17, 2021. Unless the appellate court’s decision is overturned, the OSA will be reinstated for calendar years 2017 and 2018 (but not beyond those years), and, subject to any further legal challenge, we will have to pay our ratable share of the annual surcharge for those two years. During the second quarter of 2021, we reflected an estimated liability of $50 million for the OSA surcharge in our accompanying consolidated financial statements on the assumption that the appellate court’s decision will stand. Refer to Note 19, “Commitments and Contingent Liabilities,” to the accompanying consolidated financial statements included in this Annual Report on Form 10‑K for more information.
37

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

RESULTS OF OPERATIONS
Overview of Consolidated Results:
(In millions, except per share data)Years Ended March 31, Change
20212020201920212020
Revenues$238,228 $231,051 $214,319 %%
Gross profit12,148 12,023 11,754 
Gross profit margin5.10 %5.20 %5.48 %(10)bp(28)bp
Total operating expenses$(17,188)$(9,534)$(10,868)80 %(12)%
Total operating expenses as a percentage of revenues7.21 %4.13 %5.07 %308 bp(94)bp
Other income, net$223 $12 $182 NM (93)%
Equity earnings and charges from investment in Change Healthcare Joint Venture— (1,108)(194)(100)471 
Interest expense(217)(249)(264)(13)(6)
Income (loss) from continuing operations before income taxes(5,034)1,144 610 (540)88 
Income tax benefit (expense)695 (18)(356)NM (95)
Income (loss) from continuing operations(4,339)1,126 254 (485)343 
Income (loss) from discontinued operations, net of tax(1)(6)(83)(700)
Net income (loss)(4,340)1,120 255 (488)339 
Net income attributable to noncontrolling interests(199)(220)(221)(10)-
Net income (loss) attributable to McKesson Corporation$(4,539)$900 $34 (604)%NM
Diluted earnings (loss) per common share attributable to McKesson Corporation
Continuing operations$(28.26)$4.99 $0.17 (666)%NM
Discontinued operations— (0.04)— (100)NM
Total$(28.26)$4.95 $0.17 (671)%NM
Weighted-average diluted common shares outstanding160.6 181.6 197.3 (12)%(8)%
bp - basis points
NM - computation not meaningful
38

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Revenues
Revenues increased for the years ended March 31, 2021 and 2020 compared to the respective prior years primarily due to market growth, including expanded business with existing customers, within our U.S. Pharmaceutical segment. Market growth includes growing drug utilization, price increases, and newly launched products, partially offset by price deflation associated with branded to generic drug conversion.
Gross Profit
Gross profit increased for the year ended March 31, 2021 compared to the prior year primarily in our Medical-Surgical Solutions segment driven by the demand for COVID-19 tests and the contribution from kitting and distribution of ancillary supplies for COVID-19 vaccines, partially offset by the unfavorable impact from PPE and other related products largely due to inventory charges. Gross profit was favorably impacted by growth of specialty pharmaceuticals and the contribution from our vaccine distribution programs in our U.S. Pharmaceutical segment. Gross profit was unfavorably impacted by the adverse impacts from COVID-19 largely during the first quarter of 2021, including disruptions of doctors’ office operations, deferred or cancelled elective procedures, lower demand for pharmaceuticals, and overall reduction of foot traffic in pharmacies.
Gross profit increased for the year ended March 31, 2020 compared to the prior year primarily due to market growth in our Medical-Surgical Solutions segment, partially offset by unfavorable effects of foreign currency exchange fluctuations. Gross profit and gross profit margin for the year ended March 31, 2020 compared to the prior year were unfavorably impacted by lower gains from antitrust legal settlements, partially offset by higher last-in, first-out (“LIFO”) credits in 2020. The impact from COVID-19 increased gross profit by less than 1% and decreased gross profit margin by less than 10 basis points for the year ended March 31, 2020.
Gross profit for the years ended March 31, 2021, 2020, and 2019 included LIFO inventory credits of $38 million, $252 million, and $210 million, respectively. The lower LIFO credits in 2021 compared to 2020 is primarily due to higher brand inflation and delays of branded off-patent to generic drug launches. The higher LIFO credits in 2020 compared to 2019 is primarily driven by higher generic deflation. Refer to the “Critical Accounting Policies and Estimates” section included in this Financial Review for further information. Gross profit for the years ended March 31, 2021, 2020, and 2019 also included net cash proceeds received of $181 million, $22 million, and $202 million, respectively, representing our share of antitrust legal settlements.
Total Operating Expenses
A summary and description of the components of our total operating expenses for the years ended March 31, 2021, 2020, and 2019 is as follows:

Selling, distribution, general, and administrative expenses (“SDG&A”): SDG&A consists of personnel costs, transportation costs, depreciation and amortization, lease costs, professional fee expenses, and administrative expenses.
Claims and litigation charges, net: These charges include adjustments for estimated probable settlements related to our controlled substance monitoring and reporting, and opioid-related claims, as well as any applicable income items or credit adjustments due to subsequent changes in estimates. Legal fees to defend claims, which are expensed as incurred, are included within SDG&A. We have reclassified prior period amounts to conform to the current period presentation.
Goodwill impairments charges: We perform an impairment test on goodwill balances annually in the third quarter and more frequently if indicators for potential impairment exist. The resulting goodwill impairment charges are reflected within this line item.
Restructuring, impairment, and related charges: Restructuring charges that are incurred for programs in which we change our operations, the scope of a business undertaken by our business units, or the manner in which that business is conducted as well as long-lived asset impairments.

39

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Years Ended March 31, Change
(Dollars in millions)20212020201920212020
Selling, distribution, general, and administrative expenses$8,849 $9,182 $8,437 (4)%%
Claims and litigation charges, net7,936 82 37 NM 122 
Goodwill impairment charges69 1,797 NM (100)
Restructuring, impairment, and related charges, net334 268 597 25 (55)
Total operating expenses$17,188 $9,534 $10,868 80 %(12)%
Percent of revenues7.21 %4.13 %5.07 %308 bp(94)bp
bp - basis points
NM - computation not meaningful
Total operating expenses and total operating expenses as a percentage of revenues increased for the year ended March 31, 2021 compared to the prior year, and decreased for the year ended March 31, 2020 compared to the prior year. Total operating expenses for the years ended March 31, 2021, 2020, and 2019 were affected by the following significant items:
2021
SDG&A includes opioid-related costs of $153 million, primarily related to litigation expenses;
SDG&A reflects cost savings of $95 million on travel and entertainment due to travel and meeting restrictions associated with COVID-19;
SDG&A reflects charges of $58 million to remeasure assets and liabilities held for sale to fair value less costs to sell related to the completed contribution of the majority of our German pharmaceutical wholesale business to create a joint venture with WBA in which we have a 30% ownership interest within our International segment. Refer to Financial Note 3, “Held for Sale,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for more information;
SDG&A includes a charge of $50 million related to our estimated liability under the OSA as previously discussed in the “Trends and Uncertainties” section;
SDG&A also includes lower operating expenses due to the contribution of our German pharmaceutical wholesale business to a joint venture with WBA and a divestiture in our Medical-Surgical Solutions segment that closed in 2020;
Claims and litigation charges, net includes a charge of $8.1 billion related to our estimated liability for opioid-related claims as previously discussed in the “Trends and Uncertainties” section;
Claims and litigation charges, net includes a net gain of $131 million reflecting insurance proceeds received, net of attorneys' fees and expenses awarded to plaintiffs' counsel, in connection with the previously reported $175 million settlement of the shareholder derivative action related to our controlled substances monitoring program;
Goodwill impairment charges of $69 million were recorded in connection with our segment realignment that commenced in the second quarter of 2021. Refer to the “Goodwill Impairment” section below for further details;
Restructuring, impairment, and related charges, net includes long-lived asset impairment charges of $115 million primarily related to our retail pharmacy businesses in Canada and Europe within our International segment, and the remaining $219 million primarily represents costs associated with our operating model and cost optimization efforts in our corporate headquarters and International segment; and
Total operating expenses were unfavorably impacted by foreign currency exchange fluctuations.
2020
SDG&A includes charges of $275 million to remeasure assets and liabilities held for sale to fair value less costs to sell related to the completed contribution of the majority of our German pharmaceutical wholesale business to create a joint venture with WBA;
SDG&A includes opioid-related costs of $150 million, primarily related to litigation expenses;
40

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Claims and litigation charges, net includes a settlement charge of $82 million recorded in connection with an agreement to settle all opioid-related claims filed by two Ohio counties;
Restructuring, impairment, and related charges, net includes long-lived asset impairment charges of $112 million, primarily for our United Kingdom (“U.K.”) business (mainly pharmacy licenses) and Rexall Health retail business (“Rexall Health”) (mainly customer relationships) within our International segment, and the remaining $156 million primarily represents employee severance and exit-related costs related to our 2019 restructuring initiatives, as further discussed below; and
Total operating expenses includes higher SDG&A due to our business acquisitions and to support business growth, as well as our technology initiatives, partially offset by favorable effects of foreign currency exchange fluctuations.
2019
SDG&A includes opioid-related costs of $114 million, primarily related to litigation expenses, and increased expenses due to our business acquisitions and to support growth, partially offset by a gain from an escrow settlement of $97 million representing certain indemnity and other claims related to our 2017 acquisition of Rexall Health and a credit of $90 million for the derecognition of a liability related to the tax receivable agreement (“TRA”) payable to the shareholders of Change Healthcare, Inc. (“Change”);
Goodwill impairment charges of $1.8 billion in our European Retail Pharmacy (“European RP”) and European Pharmaceutical Distribution (“European PD”) reporting units within the International segment. Of these impairment charges, $238 million was recognized upon the 2019 first quarter segment changes, which resulted in two new reporting units. The remaining charges primarily were due to declines in the reporting units’ estimated future cash flows and the selection of higher discount rates. These impairment charges generally were not deductible for income tax purposes. The declines in estimated future cash flows primarily were attributed to additional government reimbursement reductions and competitive pressures within the U.K. The risk of successfully achieving certain business initiatives was the primary factor in the use of a higher discount rate. At March 31, 2019, both the European RP and European PD reporting units had no remaining goodwill balances; and
Restructuring, impairment, and related charges, net primarily includes employee severance and exit-related costs of $352 million for our 2019 restructuring initiatives, as further discussed below and long-lived asset impairment charges of $245 million primarily for our U.K. business (mainly pharmacy licenses) within our International segment driven by additional government reimbursement reductions and competitive pressures in the U.K.
Goodwill Impairments
As discussed in the “Overview of Our Business” section, our operating structure was realigned commencing in the second quarter of 2021 into four reportable segments: U.S. Pharmaceutical, International, Medical-Surgical Solutions, and RxTS. These reportable segments encompass all operating segments of the Company. The second quarter segment realignment resulted in changes in multiple reporting units across the Company. As a result, we were required to perform a goodwill impairment test for these reporting units and recorded a goodwill impairment charge in our European RP reporting unit of $69 million during the second quarter of 2021. At March 31, 2021, the balance of goodwill for our reporting units in Europe was approximately nil and the remaining balance of goodwill in the International segment primarily relates to one of our reporting units in Canada.
We evaluate goodwill for impairment on an annual basis as of October 1, and at an interim date, if indicators of potential impairment exist. The annual impairment testing performed in 2021 did not indicate any impairment of goodwill. As of the testing date, other risks, expenses, and future developments, such as additional government actions, increased regulatory uncertainty, and material changes in key market assumptions limit our ability to estimate projected cash flows, which could adversely affect the fair value of various reporting units in future periods, including our McKesson Canada reporting unit within our International segment and our RxCrossroads reporting unit within our RxTS segment, where the risk of a material goodwill impairment is higher than other reporting units. Refer to “Critical Accounting Policies and Estimates” included in this Financial Review for further information.
41

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

On October 1, 2019, we voluntarily changed our annual goodwill impairment testing date from January 1 to October 1 to better align with the timing of our annual long-term planning process. This change was not material to our consolidated financial statements as it did not delay, accelerate, or avoid any potential goodwill impairment charge. Refer to Note 12, “Goodwill and Intangible Assets, Net,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for further information.
Restructuring Initiatives and Long-Lived Asset Impairments
During the first quarter of 2022, we approved an initiative to increase operational efficiencies and flexibility by transitioning to a partial remote work model for certain employees. This initiative primarily led us to rationalize our office space in North America. Where we determine to cease using office space, we plan to exit the portion of the facility no longer used. We also may retain and repurpose certain other office locations. We expect to incur total charges of approximately $180 million to $280 million for this initiative, consisting primarily of exit related costs, accelerated depreciation and amortization of long-lived assets, and asset impairments. This initiative is expected to be completed in 2022.
During the first quarter of 2021, we committed to an initiative within the U.K., which is included in our International segment, to further drive transformational changes in technologies and business processes, operational efficiencies, and cost savings. The initiative includes reducing the number of retail pharmacy stores, decommissioning obsolete technologies and processes, reorganizing and consolidating certain business operations, and related headcount reductions. We expect to incur total charges of approximately $85 million to $90 million, of which $57 million of charges were recorded to date. The initiative is expected to be substantially complete in 2022 and estimated remaining charges primarily consist of accelerated amortization of long-lived assets, facility and other exit costs, and employee-related costs.
In the fourth quarter of 2019, we committed to certain programs to continue our operating model and cost optimization efforts. We continue to implement centralization of certain functions and outsourcing through an expanded arrangement with a third-party vendor to achieve operational efficiency. The programs also include reorganization and consolidation of business operations, related headcount reductions, the further closures of retail pharmacy stores in Europe, and closures of other facilities. Total charges of $297 million were recorded to date. This initiative was substantially complete in 2021 and remaining costs we expect to record under this initiative are not material.
We also committed to certain actions in connection with the previously announced relocation of our corporate headquarters from San Francisco, California to Irving, Texas, which became effective April 1, 2019. Total charges of $105 million were recorded to date. The relocation was substantially complete in January 2021 and remaining costs we expect to record under this initiative, primarily relating to lease costs, are not material.
In the second quarter of 2018, we committed to a restructuring plan, which primarily consisted of the closures of underperforming retail pharmacy stores in the U.K., and a reduction in workforce. The plan was substantially complete in 2020.
On April 25, 2018, we announced a strategic growth initiative intended to drive long-term incremental profit growth and to increase operational efficiency. The initiative consisted of multiple growth priorities and plans to optimize our operating models and cost structures primarily through centralization, cost management, and outsourcing of certain administrative functions. As part of the growth initiative, we committed to implement certain actions including a reduction in workforce, facility consolidation, and store closures. This set of initiatives was substantially complete by the end of 2020.
Restructuring, impairment, and related charges for the years ended March 31, 2021, 2020, and 2019 also includes long-lived asset impairment charges of $115 million, $112 million, and $245 million, respectively, primarily related to our retail pharmacy businesses in Canada and Europe within our International segment. In addition, certain charges related to restructuring initiatives are included under the caption “Cost of sales” in our Consolidated Statements of Operations and were not material for the years ended March 31, 2021, 2020, and 2019.
Refer to Financial Note 4, “Restructuring, Impairment, and Related Charges,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for more information.
42

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Other Income, Net
Other income, net for the year ended March 31, 2021 increased compared to the prior year primarily due to net gains recognized from our equity investments of $133 million. This primarily reflects mark-to-market gains on our investments in certain U.S. growth stage companies in the healthcare industry and realized gains on the exit of some of these investments as further described in Financial Note 17, “Fair Value Measurements,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K. In future periods, fair value adjustments recognized in our operating results for these types of investments may be adversely impacted by market volatility. Other income, net also increased year over year due to pension settlement charges of $122 million recognized in 2020 related to our previously approved termination of the frozen U.S. defined benefit pension plan. In connection with the pension plan termination, we purchased annuity contracts from an insurer that will pay and administer the future pension benefits of the remaining participants.
Other income, net, for the year ended March 31, 2020 decreased compared to the prior year primarily due to the 2020 pension settlement charges described above and higher gains recognized from the sale of investments in 2019, partially offset by higher net settlement gains in 2020 from our derivative contracts.
Equity Earnings and Charges from Investment in Change Healthcare Joint Venture
Until the separation of our investment in Change Healthcare JV on March 10, 2020, we accounted for this investment using the equity method of accounting. Excluding the impairment and transaction-related items described below, our proportionate share of loss from our investment in Change Healthcare JV for the years ended March 31, 2020 and 2019 was $119 million and $194 million, respectively, which primarily includes transaction and integration expenses incurred by the joint venture and basis differences between the joint venture and McKesson including amortization of fair value adjustments. During the first quarter of 2020 and for the year ended March 31, 2019, we owned approximately 70% of this joint venture.
On June 27, 2019, common stock and certain other securities of Change began trading on the NASDAQ (“IPO”). On July 1, 2019, upon the completion of its IPO, Change contributed net cash proceeds it received from its offering of common stock to Change Healthcare JV in exchange for additional membership interests of Change Healthcare JV at the equivalent of its offering price of $13 per share. The proceeds from the concurrent offering of other securities were also used by Change to acquire certain securities of Change Healthcare JV. As a result, McKesson’s equity interest in Change Healthcare JV was reduced from 70% to approximately 58.5%, which was used to recognize our proportionate share in net loss from Change Healthcare JV, commencing in the second quarter of 2020. As a result of the ownership dilution to 58.5% from 70%, we recognized a dilution loss of approximately $246 million in the second quarter of 2020. Additionally, our proportionate share of income or loss from this investment was subsequently reduced as immaterial settlements of stock option exercises occurred after the IPO and further diluted our ownership.
In the second quarter of 2020, we recorded an other-than-temporary-impairment (“OTTI”) charge of $1.2 billion to our investment in Change Healthcare JV, representing the difference between the carrying value of our investment and the fair value derived from the corresponding closing price of Change’s common stock at September 30, 2019. This charge was included within “Equity earnings and charges from investment in Change Healthcare Joint Venture” in our Consolidated Statements of Operations for the year ended March 31, 2020.
On March 10, 2020, we completed the previously announced separation of our interest in Change Healthcare JV, which eliminated our investment in the joint venture. The separation was effected through the split-off of PF2 SpinCo, Inc. (“SpinCo”), a wholly owned subsidiary of the Company that held all of our interest in Change Healthcare JV, to certain of our stockholders through an exchange offer (“Split-off”), followed by the merger of SpinCo with and into Change, with Change surviving the merger (“Merger”).
43

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

In connection with the exchange offer, on March 9, 2020, we distributed all 176.0 million outstanding shares of common stock of SpinCo to participating holders of the Company’s common stock in exchange for 15.4 million shares of McKesson common stock. Following consummation of the exchange offer, on March 10, 2020, the Merger was consummated, with each share of SpinCo common stock converted into one share of Change common stock, par value $0.001 per share, with cash being paid in lieu of fractional shares of Change common stock. The Split-off and Merger are intended to be generally tax-free transactions to McKesson and its shareholders for U.S. federal income tax purposes. Following the Split-off, we do not beneficially own any of Change’s outstanding securities. In connection with this transaction, we recognized a net gain for financial reporting purposes of $414 million during the fourth quarter of 2020, which was largely driven by the reversal of a related deferred tax liability. Under the agreement with Change Healthcare JV, McKesson, Change, and certain subsidiaries of the Change Healthcare JV, there may be changes in future periods to the amount reversed. Any such change is not expected to be material.
After the separation, Change Healthcare JV is required under the TRA to pay McKesson 85% of the net cash tax savings realized, or deemed to be realized, resulting from depreciation or amortization allocated to Change by McKesson. The receipt of any payments under the TRA is dependent upon Change benefiting from this depreciation or amortization in future tax return filings, which creates uncertainty over the amount, timing and probability of the gain recognized. As such, we accounted for the TRA as a gain contingency, with no receivable recognized as of March 31, 2021 nor 2020.
Interest Expense
Interest expense decreased in 2021 compared to the prior year primarily due to the repayment of $1.0 billion of long-term debt in the third quarter of 2021 and a decrease in the issuance of commercial paper. Interest expense decreased in 2020 compared to the prior year primarily due to a decrease in the issuance of commercial paper, partially offset by a decrease in interest income from our derivative contracts. Interest expense fluctuates based on timing, amounts and interest rates of term debt repaid and new term debt issued, as well as amounts incurred associated with financing fees.
Income Tax (Benefit) Expense
We recorded income tax (benefit) expense of ($695 million), $18 million, and $356 million for the years ended March 31, 2021, 2020, and 2019, respectively. Our reported income tax (benefit) expense rates were (13.8%), 1.6%, and 58.4% in 2021, 2020, and 2019, respectively.
Our reported income tax rate for 2021 was impacted by the charge for opioid-related claims of $8.1 billion ($6.8 billion after-tax).
Our reported income tax expense rate for 2020 was favorably impacted by a net gain on the Change Healthcare JV divestiture of $414 million (pre-tax and after-tax), which was intended to generally be a tax-free split-off for U.S. federal income tax purposes, and unfavorably impacted by charges of $275 million (pre-tax and after-tax) to remeasure assets and liabilities held for sale to fair value less costs to sell related to the completed contribution of the majority of our German pharmaceutical wholesale business to create a joint venture with WBA. Refer to Financial Note 2,“Investment in Change Healthcare Joint Venture” and Note 3,“Held for Sale,” to the accompanying consolidated financial statements included in this Annual Report on Form 10‑K for more information.
Our reported income tax expense rate for 2019 was unfavorably impacted by charges of $1.8 billion (pre-tax and after-tax) to impair the carrying value of goodwill of our European RP and European PD reporting units within the International segment, given that these charges are generally not deductible for tax purposes. Refer to Financial Note 12, “Goodwill and Intangible Assets, Net,” to the accompanying consolidated financial statements included in this Annual Report on Form 10‑K for additional information.
Significant judgments and estimates are required in determining the consolidated income tax provision and evaluating income tax uncertainties. Although our major taxing jurisdictions include the U.S., Canada, and the U.K., we are subject to income taxes in numerous foreign jurisdictions. Our income tax expense, deferred tax assets and liabilities, and uncertain tax liabilities reflect management’s best assessment of estimated current and future taxes to be paid. We believe that we have made adequate provision for all income tax uncertainties.
44

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Income (Loss) from Discontinued Operations, Net of Tax
Income (loss) from discontinued operations, net of tax, was $(1) million, $(6) million, and $1 million for the years ended March 31, 2021, 2020, and 2019, respectively.
Net Income Attributable to Noncontrolling Interests
Net income attributable to noncontrolling interests primarily represents ClarusONE, Vantage Oncology Holdings, LLC, and the accrual of the annual recurring compensation amount of €0.83 per McKesson Europe AG (“McKesson Europe”) share that McKesson is obligated to pay to the noncontrolling shareholders of McKesson Europe under the December 2014 domination and profit and loss transfer agreement (the “Domination Agreement”). Noncontrolling interests with redemption features, such as put rights, that are not solely within our control are considered redeemable noncontrolling interests. Redeemable noncontrolling interests are presented outside of McKesson Corporation stockholders’ equity (deficit) on our consolidated balance sheet. Refer to Financial Note 9, “Redeemable Noncontrolling Interests and Noncontrolling Interests,” to the accompanying consolidated financial statements included in this Annual Report on Form 10-K for additional information.
Net Income (Loss) Attributable to McKesson Corporation
Net income (loss) attributable to McKesson Corporation was $(4.5) billion, $900 million, and $34 million for the years ended March 31, 2021, 2020, and 2019, respectively. Diluted earnings (loss) per common share attributable to McKesson Corporation was $(28.26), $4.95, and $0.17 for the years ended March 31, 2021, 2020, and 2019, respectively. Net loss per diluted share for the year ended March 31, 2021 is calculated by excluding dilutive securities from the denominator due to their antidilutive effects. Additionally, our 2021, 2020, and 2019 diluted earnings (loss) per share reflect the cumulative effects of share repurchases.
Weighted-Average Diluted Common Shares Outstanding
Diluted earnings (loss) per common share was calculated based on a weighted-average number of shares outstanding of 160.6 million, 181.6 million, and 197.3 million for the years ended March 31, 2021, 2020, and 2019, respectively. Weighted-average diluted common shares outstanding is impacted by the exercise and settlement of share-based awards and the cumulative effect of share repurchases, including the impact of shares exchanged as part of the split-off from our investment in Change Healthcare JV, as discussed above.
45

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Overview of Segment Results:
Segment Revenues:
 Years Ended March 31, Change
(Dollars in millions)20212020201920212020
Segment revenues
U.S. Pharmaceutical$189,274 $181,700 $166,189 %%
International35,965 38,341 38,023 (6)
Medical-Surgical Solutions10,099 8,305 7,618 22 
Prescription Technology Solutions2,890 2,705 2,489 
Total revenues$238,228 $231,051 $214,319 %%
U.S. Pharmaceutical
2021 vs. 2020
U.S. Pharmaceutical revenues for the year ended March 31, 2021 increased 4% compared to the prior year primarily due to market growth, including branded pharmaceutical price increases, growth in specialty pharmaceuticals, and higher volumes from retail national account customers, partially offset by branded to generic drug conversions. Revenues for this segment were unfavorably impacted by fluctuations in demand for pharmaceuticals in retail pharmacies and institutional healthcare providers due to COVID-19 largely during the onset of the pandemic in late March 2020 and during our first quarter of 2021 combined with the loss of certain customers.
2020 vs. 2019
U.S. Pharmaceutical revenues for the year ended March 31, 2020 increased 9% compared to the prior year primarily due to market growth, including branded pharmaceutical price increases, growth in specialty pharmaceuticals, higher volumes from retail national account customers, partially offset by branded to generic drug conversions.
International
2021 vs. 2020
International revenues for the year ended March 31, 2021 decreased 6% compared to the prior year. Excluding the favorable effects of foreign currency exchange fluctuations, revenues for this segment decreased 9% primarily due to the contribution of our German pharmaceutical wholesale business to a joint venture with WBA and to a lesser extent, the exit of unprofitable customers in our Canadian business. Revenues for this segment were also unfavorably impacted by lower volumes from the adverse impacts from COVID-19 in our pharmaceutical distribution and retail pharmacy businesses within Europe.
2020 vs. 2019
International revenues for the year ended March 31, 2020 increased 1% compared to the prior year. Excluding the unfavorable effects of foreign currency exchange fluctuations, revenues for this segment increased 4% primarily due to market growth in our European pharmaceutical distribution and retail pharmacy businesses.
Medical-Surgical Solutions
2021 vs. 2020
Medical-Surgical Solutions revenues for the year ended March 31, 2021 increased 22% compared to the prior year largely due to sales of COVID-19 tests and PPE.
2020 vs. 2019
Medical-Surgical Solutions revenues for the year ended March 31, 2020 increased 9% compared to the prior year primarily due to market growth in our primary care business.
46

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Prescription Technology Solutions
2021 vs. 2020
RxTS revenues for the year ended March 31, 2021 increased 7% compared to the prior year driven by increased volume with new and existing customers primarily in our CoverMyMeds business.
2020 vs. 2019
RxTS revenues for the year ended March 31, 2020 increased 9% compared to the prior year primarily driven by increased volume with new and existing customers.
Segment Operating Profit (Loss) and Corporate Expenses, Net:
 Years Ended March 31, Change
(Dollars in millions)20212020201920212020
Segment operating profit (loss) (1)
U.S. Pharmaceutical (2)
$2,763 $2,745 $2,710 %%
International (3)
(37)(161)(1,903)(77)(92)
Medical-Surgical Solutions (4)
707 499 455 42 10 
Prescription Technology Solutions (5)
395 396 355 - 12 
Other (6)
— (1,113)(104)(100)970 
Subtotal3,828 2,366 1,513 62 56 
Corporate expenses, net (7)
(8,645)(973)(639)788 52 
Interest expense(217)(249)(264)(13)(6)
Income (loss) from continuing operations before income taxes$(5,034)$1,144 $610 (540)%88 %
Segment operating profit (loss) margin
U.S. Pharmaceutical1.46 %1.51 %1.63 %(5)bp(12)bp
International(0.10)(0.42)(5.00)32 458 
Medical-Surgical Solutions7.00 6.01 5.97 99 
Prescription Technology Solutions13.67 14.64 14.26 (97)38 
bp - basis points
(1)Segment operating profit (loss) includes gross profit, net of operating expenses, as well as other income (expense), net, for our reportable segments. For retrospective periods presented, operating loss for Other reflects equity earnings and charges from our equity method investment in Change Healthcare JV, which we split-off in the fourth quarter of 2020.
(2)Operating profit for our U.S. Pharmaceutical segment includes a charge of $50 million for the year ended March 31, 2021 related to our estimated liability under the OSA.
(3)Operating loss for our International segment for the years ended March 31, 2021 and 2020 includes charges of $58 million and $275 million, respectively, to remeasure to fair value the assets and liabilities of our German pharmaceutical wholesale business which was contributed to a joint venture with WBA. This segment’s operating loss for the years ended March 31, 2021 and 2019 includes goodwill impairment charges of $69 million and $1.8 billion, respectively, as well as long-lived asset impairment charges for the years ended March 31, 2021, 2020, and 2019 of $115 million, $112 million, and $245 million, respectively, primarily related to our retail pharmacy businesses in Canada and Europe.
(4)Operating profit for our Medical-Surgical Solutions segment for the year ended March 31, 2021 includes charges totaling $136 million on certain PPE and other related products due to inventory impairments and excess inventory.
(5)Operating profit for our RxTS segment for the year ended March 31, 2019 includes a gain of $56 million from the divestiture of an equity investment.
(6)Operating loss for Other for the year ended March 31, 2020 includes an OTTI charge of $1.2 billion and a dilution loss of $246 million related to our investment in Change Healthcare JV, partially offset by a net gain of $414 million related to the completed separation of our interest in Change Healthcare JV during the fourth quarter of 2020. Operating loss for the year ended March 31, 2019 includes a credit of $90 million for the derecognition of a liability related to the TRA payable to the shareholders of Change.
47

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

(7)Corporate expenses, net for the year ended March 31, 2021 includes a charge of $8.1 billion related to our estimated liability for opioid-related claims, net gains of $133 million from our equity investments, and a net gain of $131 million recorded in connection with insurance proceeds received from the settlement of the shareholder derivative action related to our controlled substances monitoring program. Corporate expenses, net for the year ended March 31, 2020 includes pension settlement charges of $122 million and a settlement charge of $82 million related to opioid claims.
U.S. Pharmaceutical
2021 vs. 2020
Operating profit increased for the year ended March 31, 2021 compared to the prior year primarily due to an increase in net cash proceeds received of $159 million in 2021 compared to 2020 representing our share of antitrust legal settlements, growth in specialty pharmaceuticals, and the contribution from our vaccine distribution programs. This was partially offset by a decrease in LIFO credits of $214 million, a charge of $50 million recorded in 2021 related to our estimated liability under the OSA, net impacts from COVID-19, including a less severe cough, cold, and flu season, as well as increased costs for strategic growth initiatives.
2020 vs. 2019
Operating profit increased for the year ended March 31, 2020 compared to the prior year primarily due to market growth in our specialty business. Operating profit and operating profit margin were favorably impacted by a charge of $61 million related to a customer bankruptcy in 2019 and an increase in LIFO credits of $42 million. Operating profit and operating profit margin were unfavorably impacted by customer mix and a decrease in net cash proceeds received of $180 million representing our share of antitrust legal settlements.
International
2021 vs. 2020
Operating loss and operating loss margin improved for the year ended March 31, 2021 compared to the prior year primarily due to a decrease in the charges recorded to remeasure to fair value the assets and liabilities of our German pharmaceutical wholesale business which was contributed to a joint venture with WBA, of which $58 million and $275 million was reflected for the years ended March 31, 2021 and 2020, respectively. This was partially offset by a goodwill impairment charge of $69 million recorded in the second quarter of 2021 related to our European retail pharmacy business. The impacts from COVID-19 in our pharmaceutical distribution and retail pharmacy businesses within Europe also caused unfavorability in our segment results year over year.
2020 vs. 2019
Operating loss and operating loss margin improved for the year ended March 31, 2020 compared to the prior year primarily due to goodwill impairment charges of $1.8 billion in 2019 and a decrease in long-lived asset impairment charges of $112 million in 2020 compared to $245 million in 2019. This was partially offset by the fair value remeasurement charges in 2020 described above and a gain from an escrow settlement of $97 million in 2019 related to our 2017 acquisition of Rexall Health.
Medical-Surgical Solutions
2021 vs. 2020
Operating profit and operating profit margin increased for the year ended March 31, 2021 compared to prior year primarily due to COVID-19, including demand for COVID-19 tests and PPE, as well as the contribution from kitting and distribution of ancillary supplies for COVID-19 vaccines. This was partially offset by inventory charges on certain PPE and other related products, unfavorability in our primary care business due to customer closures largely during the first quarter of 2021, and a less severe cough, cold, and flu season. Additionally, operating profit was favorable year over year due to lower operating expenses, including a decrease in our provision for bad debts.
2020 vs. 2019
Operating profit and operating profit margin increased for the year ended March 31, 2020 compared to prior year primarily due to market growth in our primary care business and lower restructuring charges, partially offset by the remeasurement of assets and liabilities to fair value related to a divestiture that was completed in 2020 and higher operating expenses, including an increase in our provision for bad debts.
48

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Prescription Technology Solutions
2021 vs. 2020
Operating profit remained relatively flat for the year ended March 31, 2021 compared to prior year primarily due to higher operating expenses to support business growth, offset by increased volume with new and existing customers. Operating profit margin decreased for the year ended March 31, 2021 compared to prior year primarily due to higher operating expenses.
2020 vs. 2019
Operating profit and operating profit margin increased for the year ended March 31, 2020 compared to prior year primarily due to increased volumes with new and existing customers, integration costs incurred in 2019 for our acquisition of RxCrossroads that closed during the fourth quarter of 2018, partially offset by a gain of $56 million from the divestiture of an equity investment in 2019.
Other
Operating loss for Other for the year ended March 31, 2020 includes an OTTI charge of $1.2 billion and a dilution loss of $246 million related to our investment in Change Healthcare JV, partially offset by a net gain of $414 million related to the completed separation of our interest in Change Healthcare JV during the fourth quarter of 2020. Operating loss for Other for the year ended March 31, 2019 includes a credit of $90 million for the derecognition of a liability related to the TRA payable to the shareholders of Change. Operating loss for Other also includes our proportionate share of loss from Change Healthcare JV of $119 million and $194 million for the years ended March 31, 2020 and 2019, respectively.
Corporate
2021 vs. 2020
Corporate expenses, net increased for the year ended March 31, 2021 compared to the prior year due to a charge of $8.1 billion related to our estimated liability for opioid-related claims.
Corporate expenses, net for 2021 also includes net gains recognized from our equity investments of $133 million and a net gain of $131 million recognized in connection with insurance proceeds received from the settlement of the shareholder derivative action related to our controlled substances monitoring program. Corporate expenses, net, for 2020 includes pension settlement charges of $122 million, an opioid claim settlement charge of $82 million, and net settlement gains of $26 million recognized from our derivative contracts.
2020 vs. 2019
Corporate expenses, net, increased for the year ended March 31, 2020 compared to the prior year primarily due to the pension settlement charges and opioid claim settlement charge mentioned above, as well as higher costs for technology initiatives, partially offset by net settlement gains recognized in 2020 from our derivative contracts. Corporate expenses, net, for 2020 also included charitable contribution expenses of approximately $20 million primarily for the McKesson Foundation.
49

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Foreign Operations
Our foreign operations represented approximately 15%, 17%, and 18% of our consolidated revenues in 2021, 2020, and 2019, respectively. Foreign operations are subject to certain risks, including currency fluctuations. We monitor our operations and adopt strategies responsive to changes in the economic and political environment in each of the countries in which we operate. We conduct our business worldwide in local currencies including Euro, British pound sterling, and Canadian dollar. As a result, the comparability of our results reported in U.S. dollars can be affected by changes in foreign currency exchange rates. In discussing our operating results, we may use the term “foreign currency exchange fluctuations,” which refers to the effect of changes in foreign currency exchange rates used to convert the local currency results of our operations in foreign countries where the functional currency is not the U.S. dollar. We present this information to provide a framework for assessing how our business performed excluding the effect of foreign currency exchange rate fluctuations. In computing the foreign currency exchange fluctuations, we translate our current year results of our operations in foreign countries recorded in local currencies into U.S dollars by applying their respective average foreign currency exchange rates of the corresponding prior year periods, and we subsequently compare those results to the previously reported results of the comparable prior year periods reported in U.S. dollars. Additional information regarding our foreign operations is included in Financial Note 22, “Segments of Business,” to the consolidated financial statements appearing in this Annual Report on Form 10-K.
Business Combinations
Refer to Financial Note 5, “Business Acquisitions and Divestitures,” to the consolidated financial statements appearing in this Annual Report on Form 10-K for additional information.
Fiscal 2022 Outlook
Information regarding the Company’s fiscal 2022 outlook is contained in our Form 8-K dated May 6, 2021. That Form 8-K should be read in conjunction with the forward-looking statements in the "Trends and Uncertainties" section of this Financial Review, as well as the cautionary statements in Item 1, "Business - Forward-Looking Statements," and Item 1A, "Risk Factors," in Part I of this Annual Report on Form 10-K.
CRITICAL ACCOUNTING POLICIES AND ESTIMATES
We consider an accounting estimate to be critical if the estimate requires us to make assumptions about matters that were uncertain at the time the accounting estimate was made and if different estimates that we reasonably could have used in the current period, or changes in the accounting estimate that are reasonably likely to occur from period to period, could have a material impact on our financial condition or results from operations. Below are the estimates that we believe are critical to the understanding of our operating results and financial condition. Other accounting policies are described in Financial Note 1, “Significant Accounting Policies,” to the consolidated financial statements appearing in this Annual Report on Form 10-K. Because of the uncertainty inherent in such estimates, actual results may differ from these estimates.
Allowance for Doubtful Accounts: We provide short-term credit and other customer financing arrangements to customers who purchase our products and services. Other customer financing primarily relates to guarantees provided to our customers, or their creditors, regarding the repurchase of inventories. We also provide financing to certain customers related to the purchase of pharmacies, which serve as collateral for the loans. We estimate the receivables for which we do not expect full collection based on historical collection rates and specific knowledge regarding the current creditworthiness of our customers and record an allowance in our consolidated financial statements for these amounts.
The Company considers historical experience, the current economic environment, customer credit ratings or bankruptcies, and reasonable and supportable forecasts to develop its allowance for doubtful accounts. Management reviews these factors quarterly to determine if any adjustments are needed to the allowance.
50

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Sales to the Company’s ten largest customers, including group purchasing organizations (“GPOs”), accounted for approximately 51% of total consolidated revenues in 2021 and comprised approximately 32% of total trade accounts receivable at March 31, 2021. Sales to our largest customer, CVS Health Corporation (“CVS”), accounted for approximately 21% of our total consolidated revenues in 2021 and comprised approximately 19% of total trade accounts receivable at March 31, 2021. As a result, our sales and credit concentration is significant. We also have agreements with GPOs, each of which functions as a purchasing agent on behalf of member hospitals, pharmacies and other healthcare providers, as well as with government entities and agencies. The accounts receivables balances are with individual members of the GPOs, and therefore no significant concentration of credit risk exists. A material default in payment, a material reduction in purchases from these or any other large customers, or the loss of a large customer or GPO could have a material adverse impact on our financial position, results of operations, and liquidity.
Reserve methodologies are assessed annually based on historical losses and economic, business and market trends. In addition, reserves are reviewed quarterly and updated if unusual circumstances or trends are present. We believe the reserves maintained and expenses recorded in 2021 are appropriate and consistent in the context of historical methodologies employed, as well as assessment of trends currently available.
At March 31, 2021, trade and notes receivables were $17.5 billion prior to allowances of $211 million. In 2021, 2020 and, 2019, our provision for bad debts was $4 million, $91 million, and $132 million, respectively. At March 31, 2021 and 2020, the allowance as a percentage of trade and notes receivables was 1.2% and 1.4%, respectively. An increase or decrease of a hypothetical 0.1% in the 2021 allowance as a percentage of trade and notes receivables would result in an increase or decrease in the provision for bad debts of approximately $18 million. The selected 0.1% hypothetical change does not reflect what could be considered the best or worst-case scenarios. Additional information concerning our allowance for doubtful accounts may be found in Schedule II included in this Annual Report on Form 10-K.
Inventories: Inventories consist of merchandise held for resale. We report inventories at the lower of cost or net realizable value, except for inventories determined using the LIFO method which are valued at the lower of LIFO cost or market. LIFO method presumes that the most recent inventory purchases are the first items sold and the inventory cost under LIFO approximates market. The majority of the cost of domestic inventories is determined using the LIFO method. The majority of the cost of inventories held in foreign and certain domestic locations is based on the first-in, first-out (“FIFO”) method and weighted-average purchase prices. Rebates, cash discounts and other incentives received from vendors relating to the purchase or distribution of inventory are considered product discounts and are accounted for as a reduction in the cost of inventory and are recognized when the inventory is sold.
At March 31, 2021 and 2020, total inventories, net were $19.2 billion and $16.7 billion, respectively, in our Consolidated Balance Sheets. The LIFO method was used to value approximately 58% and 60% of our inventories at March 31, 2021 and 2020, respectively. If we had used the moving average method of inventory valuation, inventories would have been approximately $406 million and $444 million higher than the amounts reported at March 31, 2021 and 2020, respectively. These amounts are equivalent to our LIFO reserves. The lower LIFO credits in 2021 compared to 2020 is primarily due to higher brand inflation and delays of branded off-patent to generic drug launches. Our LIFO valuation amount includes both pharmaceutical and non-pharmaceutical products. We recognized LIFO credits of $38 million, $252 million, and $210 million, respectively, in 2021, 2020, and 2019 in our Consolidated Statements of Operations. A LIFO charge is recognized when the net effect of price increases on pharmaceutical and non-pharmaceutical products held in inventory exceeds the impact of price declines, including the effect of branded pharmaceutical products that have lost market exclusivity. A LIFO credit is recognized when the net effect of price declines exceeds the impact of price increases on pharmaceutical and non-pharmaceutical products held in inventory. Excluding LIFO reserves, our inventory reserves as of March 31, 2021 and 2020 were $263 million and $96 million, respectively. The increase was primarily due to 2021 charges totaling $136 million on certain PPE and other related products due to inventory impairments and excess inventory within our Medical-Surgical Solutions segment.
We believe that the moving average inventory costing method provides a reasonable estimation of the current cost of replacing inventory (i.e., “market”). As such, our LIFO inventory is valued at the lower of LIFO or market. As of March 31, 2021 and 2020, inventories at LIFO did not exceed market.
51

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

In determining whether an inventory valuation allowance is required, we consider various factors including estimated quantities of slow-moving inventory by reviewing on-hand quantities, outstanding purchase obligations and forecasted sales. Shifts in market trends and conditions, changes in customer preferences due to the introduction of generic drugs or new pharmaceutical products or the loss of one or more significant customers are factors that could affect the value of our inventories. We write down inventories which are considered excess and obsolete as a result of these reviews. These factors could make our estimates of inventory valuation differ from actual results.
Business Combinations: The Company accounts for business combinations using the acquisition method of accounting whereby the identifiable assets and liabilities of the acquired business, as well as any noncontrolling interest in the acquired business, are recorded at their estimated fair values as of the date that the Company obtains control of the acquired business. Any purchase consideration in excess of the estimated fair values of the net assets acquired is recorded as goodwill. Acquisition-related expenses and related restructuring costs are expensed as incurred.
Several valuation methods may be used to determine the fair value of assets acquired and liabilities assumed. For intangible assets, we typically use a method that is a form or variation of the income approach, whereby a forecast of future cash flows attributable to the asset are discounted to present value using a risk-adjusted discount rate. Some of the more significant estimates and assumptions inherent in the income approach include the amount and timing of projected future cash flows, the discount rate selected to measure the risks inherent in the future cash flows and the assessment of the asset’s expected useful life. Refer to Financial Note 5, “Business Acquisitions and Divestitures,” to the consolidated financial statements included in this Annual Report on Form 10-K for additional information regarding our acquisitions.
Goodwill and Long-Lived Assets: As a result of acquiring businesses, we have $9.5 billion and $9.4 billion of goodwill at March 31, 2021 and 2020, respectively, and $2.9 billion and $3.2 billion of intangible assets, net at March 31, 2021 and 2020, respectively. We perform an impairment test on goodwill balances annually in the third quarter and more frequently if indicators for potential impairment exist. Indicators that are considered include significant declines in performance relative to expected operating results, significant changes in the use of the assets, significant negative industry or economic trends, or a significant decline in the Company’s stock price and/or market capitalization for a sustained period of time.
Goodwill impairment testing is conducted at the reporting unit level, which is generally defined as an operating segment or a component, one level below our operating segments, for which discrete financial information is available and segment management regularly reviews the operating results of that reporting unit.
We apply the goodwill impairment test by comparing the estimated fair value of a reporting unit to its carrying value and recording an impairment charge equal to the amount of excess carrying value above the estimated fair value, if any, but not to exceed the amount of goodwill allocated to the reporting unit.
To estimate the fair value of our reporting units, we generally use a combination of the market approach and the income approach. Under the market approach, we estimate fair value by comparing the business to similar businesses, or guideline companies whose securities are actively traded in public markets. Under the income approach, we use a discounted cash flow (“DCF”) model in which cash flows anticipated over several periods, plus a terminal value at the end of that time horizon, are discounted to their present value using an appropriate rate that is commensurate with the risk inherent within the reporting unit. In addition, we compare the aggregate of the reporting units’ fair values to our market capitalization as further corroboration of the fair values.
52

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Estimates of fair value result from a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions at a point in time. Judgments made in determining an estimate of fair value may materially impact our results of operations. The valuations are based on information available as of the impairment testing date and are based on expectations and assumptions that have been deemed reasonable by management. Any material changes in key assumptions, including failure to meet business plans, negative changes in government reimbursement rates, deterioration in the U.S. and global financial markets, an increase in interest rates or an increase in the cost of equity financing by market participants within the industry or other unanticipated events and circumstances, may decrease the projected cash flows or increase the discount rates and could potentially result in an impairment charge. Under the market approach, significant estimates and assumptions also include the selection of appropriate guideline companies and the determination of appropriate valuation multiples to apply to the reporting unit. Under the income approach, significant estimates and assumptions also include the determination of discount rates. The discount rates represent the weighted-average cost of capital measuring the reporting unit’s cost of debt and equity financing, which are weighted by the percentage of debt and percentage of equity in a company’s target capital structure. Included in the estimate of the weighted-average cost of capital is the assumption of an unsystematic risk premium to address incremental uncertainty related to the reporting units’ future cash flow projections. An increase in the unsystematic risk premium increases the discount rate.
Based on the 2019 annual goodwill impairment tests, the estimated fair values of our reporting units, excluding the Europe Retail Pharmacy and Europe Pharmaceutical Distribution reporting units in our International segment, exceeded their carrying values. The impairment testing performed in 2020 did not indicate any material impairment of goodwill. The segment change in the second quarter of 2021 prompted changes in multiple reporting units across the Company. As a result, goodwill included in impacted reporting units was reallocated using a relative fair value approach and assessed for impairment both before and after the reallocation. We recorded a goodwill impairment charge of $69 million in 2021 as the estimated fair value of the Europe Retail Pharmacy reporting unit was lower than its reassigned carrying value based on changes in the composition of the Europe Retail Pharmacy reporting unit within the International segment. At March 31, 2021, the balance of goodwill for the reporting units in Europe was approximately nil and the remaining balance of goodwill in the International segment primarily relates to one of our reporting units in Canada.
The estimated fair values of our McKesson Canada reporting unit in our International segment and our RxCrossroads reporting unit in our RxTS segment exceeded the carrying values of these reporting units by 11% and 14%, respectively, in 2021. The goodwill balance of these reporting units was $1.5 billion for McKesson Canada and $312 million for RxCrossroads at March 31, 2021 or approximately 19% of the consolidated goodwill balance. Generally, a decline in estimated future cash flows in excess of 16% for McKesson Canada and 17% for RxCrossroads or an increase in the discount rate in excess of approximately 1.5% could result in an indication of goodwill impairment for these reporting units in future reporting periods. Other risks, expenses and future developments, such as additional government actions, increased regulatory uncertainty, and material changes in key market assumptions that we were unable to anticipate as of the testing date may require us to further revise the projected cash flows, which could adversely affect the fair value of our other reporting units in future periods. Refer to Financial Note 12, “Goodwill and Intangible Assets, Net,” to the consolidated financial statements appearing in this Annual Report on Form 10-K for additional information.
Currently, all of our intangible and other long-lived assets are amortized or depreciated based on the pattern of their economic consumption or on a straight-line basis over their estimated useful lives, ranging from one to 38 years. We review intangible assets for impairment at an asset group level whenever events or changes in circumstances indicate that the carrying value of the assets may not be recoverable. Determination of recoverability of intangible assets is based on the lowest level of identifiable estimated future undiscounted cash flows resulting from use of the asset and its eventual disposition. Measurement of any impairment loss is based on the excess of the carrying value of the asset group over its fair value. Assumptions and estimates about future values and remaining useful lives of our purchased intangible assets are complex and subjective. They can be affected by a variety of factors, including external factors such as industry and economic trends, and internal factors such as changes in our business strategy and our internal forecasts.
Our ongoing consideration of all the factors described previously could result in further impairment charges in the future, which could adversely affect our net income. Refer to Financial Note 4, “Restructuring, Impairment, and Related Charges” to the consolidated financial statements appearing in this Annual Report on Form 10-K for additional information.
53

Table of Contents
McKESSON CORPORATION
FINANCIAL REVIEW (Continued)

Valuation of Equity Method Investments: We evaluate our investments for other-than-temporary impairments when circumstances indicate those assets may be impaired. When the decline in value is deemed to be other than temporary, an impairment is recognized to the extent that the fair value is less than the carrying value of the investment. We consider various factors in determining whether a loss in value of an investment is other than temporary including: the length of time and the extent to which the fair value has been below cost, the financial condition of the investees, and our intent and ability to retain the investment for a period of time sufficient to allow for recovery of value. Management makes certain judgments and estimates in its assessment in