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  <xs:element id="cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TaxAdjustmentsAxis" abstract="true" name="TaxAdjustmentsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_ThemeParksMember" abstract="true" name="ThemeParksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ResidentialWirelessMember" abstract="true" name="ResidentialWirelessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ContentLicensingAndOtherMember" abstract="true" name="ContentLicensingAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_DeferredTaxAssetsOperatingLossAndOtherLossCarryforwards" abstract="false" name="DeferredTaxAssetsOperatingLossAndOtherLossCarryforwards" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CarryingAmountOfRedeemablePreferredStock" abstract="false" name="CarryingAmountOfRedeemablePreferredStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FilmCostsUnderPreviousGuidanceAbstract" abstract="true" name="FilmCostsUnderPreviousGuidanceAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_TheatricalFilmCostsInProductionAndInDevelopment" abstract="false" name="TheatricalFilmCostsInProductionAndInDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_BuildingsThemeParkInfrastructureAndLeaseholdImprovementsMember" abstract="true" name="BuildingsThemeParkInfrastructureAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_CommitmentAndContingenciesLineItems" abstract="true" name="CommitmentAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_AccountsReceivableAllowanceForCreditLossDeductionsFromReserves" abstract="false" name="AccountsReceivableAllowanceForCreditLossDeductionsFromReserves" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialsUnrecordedFutureMinimumAmount" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialsUnrecordedFutureMinimumAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FormerCFOMember" abstract="true" name="FormerCFOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod" abstract="false" name="RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_IncomeTaxesTable" abstract="true" name="IncomeTaxesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity" abstract="false" name="ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DirectToConsumerMember" abstract="true" name="DirectToConsumerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_TransactionRelatedCosts" abstract="false" name="TransactionRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests" abstract="false" name="ContributionsFromAndDistributionsToNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_NBCUniversalSegmentsMember" abstract="true" name="NBCUniversalSegmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_PreferredStockRedemptionValue" abstract="false" name="PreferredStockRedemptionValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ScheduleOfOtherBalanceSheetAccountsTableTextBlock" abstract="false" name="ScheduleOfOtherBalanceSheetAccountsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_SupplementalFinancialInformationTable" abstract="true" name="SupplementalFinancialInformationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_LineofCreditfacilityPotentialincreasetoMaximumBorrowingCapacity" abstract="false" name="LineofCreditfacilityPotentialincreasetoMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredTaxLiabilitiesLongTermDebt" abstract="false" name="DeferredTaxLiabilitiesLongTermDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DistributionSystemMember" abstract="true" name="DistributionSystemMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_UniversalBeijingResortMember" abstract="true" name="UniversalBeijingResortMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearTwo" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ChangesInNetDeferredTaxLiabilityRelatedToOtherComprehensiveIncome" abstract="false" name="ChangesInNetDeferredTaxLiabilityRelatedToOtherComprehensiveIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TheatricalFilmCostsAndDirecttoTelevisionCostsInProductionAndInDevelopment" abstract="false" name="TheatricalFilmCostsAndDirecttoTelevisionCostsInProductionAndInDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FilmedEntertainmentMember" abstract="true" name="FilmedEntertainmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ProceedsFromCollateralizedObligation" abstract="false" name="ProceedsFromCollateralizedObligation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CommonStockVotingPower" abstract="false" name="CommonStockVotingPower" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="cmcsa_DeferredCompensationPlansTableTextBlock" abstract="false" name="DeferredCompensationPlansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_ProgrammingRightsCurrent" abstract="false" name="ProgrammingRightsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_PreferredStockPutPeriod" abstract="false" name="PreferredStockPutPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_ValuationAllowanceDeferredTaxAssetDeductionsFromReserves" abstract="false" name="ValuationAllowanceDeferredTaxAssetDeductionsFromReserves" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ScheduleOfProgrammingAndProductionCostTableTextBlock" abstract="false" name="ScheduleOfProgrammingAndProductionCostTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_NonredeemablePreferredStock" abstract="false" name="NonredeemablePreferredStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" abstract="false" name="TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CommitmentAndContingenciesTable" abstract="true" name="CommitmentAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_ResidentialVideoMember" abstract="true" name="ResidentialVideoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_Notes0.750percentdue2032Member" abstract="true" name="Notes0.750percentdue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract" abstract="false" name="RevenuePerformanceObligationDescriptionOfTimingTermOfContract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_NumberofPreferredStockSeries" abstract="false" name="NumberofPreferredStockSeries" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cmcsa_VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment" abstract="false" name="VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_SeniorNotesWithMaturitiesBetween5And10YearsatfacevalueMember" abstract="true" name="SeniorNotesWithMaturitiesBetween5And10YearsatfacevalueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ProgrammingAndProductionCosts" abstract="false" name="ProgrammingAndProductionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearOne" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ComponentsOfInvestmentandOtherIncomeLossNetTableTextBlock" abstract="false" name="ComponentsOfInvestmentandOtherIncomeLossNetTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_TheatricalFilmCostsAndDirectToTelevisionCostsReleased" abstract="false" name="TheatricalFilmCostsAndDirectToTelevisionCostsReleased" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentFundingCommitmentbyManagementCompanyInvestors" abstract="false" name="EquityMethodInvestmentFundingCommitmentbyManagementCompanyInvestors" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DistributionAndOtherMember" abstract="true" name="DistributionAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_CableCommunicationsMember" abstract="true" name="CableCommunicationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_CableNetworksMember" abstract="true" name="CableNetworksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_DocumentAndEntityInformationTable" abstract="true" name="DocumentAndEntityInformationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_ScheduleOfEstimatedFutureAmortizationExpenseForCapitalizedFilmAndTelevisionCostTableTextBlock" abstract="false" name="ScheduleOfEstimatedFutureAmortizationExpenseForCapitalizedFilmAndTelevisionCostTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_Percentageofresidualreturns" abstract="false" name="Percentageofresidualreturns" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="cmcsa_OtherIncomeLossNet" abstract="false" name="OtherIncomeLossNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TaxAdjustmentsDomain" abstract="true" name="TaxAdjustmentsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_Notes0.250percentDue2027Member" abstract="true" name="Notes0.250percentDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentFairMarketValueFloorForPutAndCallOption" abstract="false" name="EquityMethodInvestmentFairMarketValueFloorForPutAndCallOption" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ContractualValueofaPotentialFutureObligation" abstract="false" name="ContractualValueofaPotentialFutureObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_ContentMember" abstract="true" name="ContentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentFundingCommitment" abstract="false" name="EquityMethodInvestmentFundingCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_GainLossOnInvestmentsAndOtherNoncashIncomeLossNet" abstract="false" name="GainLossOnInvestmentsAndOtherNoncashIncomeLossNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FilmMonetizedOnItsOwnCapitalizedCostInProductionAndInDevelopment" abstract="false" name="FilmMonetizedOnItsOwnCapitalizedCostInProductionAndInDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_UncertainAndEffectivelySettledTaxPositionsNetMember" abstract="true" name="UncertainAndEffectivelySettledTaxPositionsNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_AirTouchMember" abstract="true" name="AirTouchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentOwnershipPercentageFloor" abstract="false" name="EquityMethodInvestmentOwnershipPercentageFloor" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCost" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCost" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_AccruedParticipationsAndResidualsCurrent" abstract="false" name="AccruedParticipationsAndResidualsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_InvestmentSecuringCollateralizedObligation" abstract="false" name="InvestmentSecuringCollateralizedObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DebtIssuanceCostsPremiumsDiscountsAndFairValueAdjustmentsForAcquisitionAccountingAndHedgedPositions" abstract="false" name="DebtIssuanceCostsPremiumsDiscountsAndFairValueAdjustmentsForAcquisitionAccountingAndHedgedPositions" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ForeignCurrencyDenominatedDebtMember" abstract="true" name="ForeignCurrencyDenominatedDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_SkyLimitedMember" abstract="true" name="SkyLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_PaymentsForRepurchaseandRedemptionofSubsidiaryPreferredStock" abstract="false" name="PaymentsForRepurchaseandRedemptionofSubsidiaryPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostCurrent" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_OtherOperatingAndAdministrative" abstract="false" name="OtherOperatingAndAdministrative" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ExchangeableSubordinatedDebentures2.0PercentDue2029Member" abstract="true" name="ExchangeableSubordinatedDebentures2.0PercentDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_SignificantTransactionsTextBlock" abstract="false" name="SignificantTransactionsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_DirecttoTelevisionFilmCostsInProductionandInDevelopment" abstract="false" name="DirecttoTelevisionFilmCostsInProductionandInDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityTable" abstract="true" name="EquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStockMember" abstract="true" name="RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_PreferredStockCallPeriod" abstract="false" name="PreferredStockCallPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_AmountOfNetInvestmentInForeignSubsidiariesHedged" abstract="false" name="AmountOfNetInvestmentInForeignSubsidiariesHedged" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FilmAndTelevisionCosts" abstract="false" name="FilmAndTelevisionCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ChangeInCurrentAndNoncurrentReceivablesNet" abstract="false" name="ChangeInCurrentAndNoncurrentReceivablesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TheatricalMember" abstract="true" name="TheatricalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_OtherProgrammingAndProductionExpense" abstract="false" name="OtherProgrammingAndProductionExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentAnnualCapitalCallsMaximumAmount" abstract="false" name="EquityMethodInvestmentAnnualCapitalCallsMaximumAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ContentLicensingMember" abstract="true" name="ContentLicensingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_CollateralizedObligationFairValue" abstract="false" name="CollateralizedObligationFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_FilmCostsAndEntertainmentEntitiesPolicyPolicyTextBlock" abstract="false" name="FilmCostsAndEntertainmentEntitiesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_ResidentialMember" abstract="true" name="ResidentialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_NbcuniversalEnterpriseMember" abstract="true" name="NbcuniversalEnterpriseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ValuationAllowanceDeferredTaxAssetAdditionsChargedToIncomeTaxExpenseAndOtherAccounts" abstract="false" name="ValuationAllowanceDeferredTaxAssetAdditionsChargedToIncomeTaxExpenseAndOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_InterestExpenses" abstract="false" name="InterestExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_Notes1.500percentDue2029Member" abstract="true" name="Notes1.500percentDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_AmountOfForeignCurrencyDenominatedDebtHedged" abstract="false" name="AmountOfForeignCurrencyDenominatedDebtHedged" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_Notes1.250percentdue2040Member" abstract="true" name="Notes1.250percentdue2040Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_SupplementalFinancialInformationLineItems" abstract="true" name="SupplementalFinancialInformationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_AtairosMember" abstract="true" name="AtairosMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_SeniorNotesWithMaturitiesOf5YearsOrLessatFaceValueMember" abstract="true" name="SeniorNotesWithMaturitiesOf5YearsOrLessatFaceValueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_UniversalBeijingResortTermLoansMember" abstract="true" name="UniversalBeijingResortTermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_AdjustedEBITDA" abstract="false" name="AdjustedEBITDA" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityLineItems" abstract="true" name="EquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock" abstract="false" name="NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_Notes1.875percentdue2036Member" abstract="true" name="Notes1.875percentdue2036Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_PaymentsToAcquireIntangibleAssetsSpectrumRights" abstract="false" name="PaymentsToAcquireIntangibleAssetsSpectrumRights" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearThree" abstract="false" name="EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesExpectedAmortizationYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_Notes5.50PercentDue2029Member" abstract="true" name="Notes5.50PercentDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_NumberofDivisions" abstract="false" name="NumberofDivisions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cmcsa_DistributionMember" abstract="true" name="DistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_VariableInterestEntityMaximumBorrowingCapacity" abstract="false" name="VariableInterestEntityMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_UnrecognizedTaxBenefitsIncreasesResultingFromAcquiredSubsidiaries" abstract="false" name="UnrecognizedTaxBenefitsIncreasesResultingFromAcquiredSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterTax" abstract="false" name="AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredCompensationPlansInterestCost" abstract="false" name="DeferredCompensationPlansInterestCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredTaxLiabilityInvestments" abstract="false" name="DeferredTaxLiabilityInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndIntangibleAssets" abstract="false" name="DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CustomerPremiseEquipmentMember" abstract="true" name="CustomerPremiseEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ChangesInTheValuationAllowanceForDeferredTaxAssetsValuationAllowanceRollForward" abstract="true" name="ChangesInTheValuationAllowanceForDeferredTaxAssetsValuationAllowanceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_OperatingLeaseExpenseInclusiveOfShortTermAndVariableLeaseExpenses" abstract="false" name="OperatingLeaseExpenseInclusiveOfShortTermAndVariableLeaseExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CarryingValueOfContractualObligation" abstract="false" name="CarryingValueOfContractualObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_TheatricalFilmCostsAndDirectToTelevisionCostsCompletedAndNotReleased" abstract="false" name="TheatricalFilmCostsAndDirectToTelevisionCostsCompletedAndNotReleased" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredCompensationPlansBenefitObligation" abstract="false" name="DeferredCompensationPlansBenefitObligation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ResidentialHighSpeedInternetMember" abstract="true" name="ResidentialHighSpeedInternetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_AnnualRevenueThatEstimatesRemainingPerformanceObligations" abstract="false" name="AnnualRevenueThatEstimatesRemainingPerformanceObligations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_LettersOfCreditAndBankGuaranteesOutstandingAmount" abstract="false" name="LettersOfCreditAndBankGuaranteesOutstandingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ScheduleOfCapitalizedFilmAndTelevisionCostsTableTextBlock" abstract="false" name="ScheduleOfCapitalizedFilmAndTelevisionCostsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_TermLoansMember" abstract="true" name="TermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_ScheduleOfCurrentAndNoncurrentAssetsAndLiabilitiesTableTextBlock" abstract="false" name="ScheduleOfCurrentAndNoncurrentAssetsAndLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock" abstract="false" name="ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_VideoDistributionProgrammingExpense" abstract="false" name="VideoDistributionProgrammingExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CollateralizedObligation" abstract="false" name="CollateralizedObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_ForeignCurrencyDenominatedBorrowingsMember" abstract="true" name="ForeignCurrencyDenominatedBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_CapitalCostsIncurredButNotYetPaid" abstract="false" name="CapitalCostsIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_NumberOfVotesEntitledOfEachClassBCommonStock" abstract="false" name="NumberOfVotesEntitledOfEachClassBCommonStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType"/>
  <xs:element id="cmcsa_BusinessAcquisitionProFormaNetIncomeLossAttributableToParent" abstract="false" name="BusinessAcquisitionProFormaNetIncomeLossAttributableToParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentMaximumTotalCapitalCallInAnnualPeriod" abstract="false" name="EquityMethodInvestmentMaximumTotalCapitalCallInAnnualPeriod" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_LicenseAgreementCommitmentsSportsRightsUnrecordedFutureMinimumAmount" abstract="false" name="LicenseAgreementCommitmentsSportsRightsUnrecordedFutureMinimumAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentOwnershipPercentageRepresentingFairMarketValueFloorForPutAndCallOption" abstract="false" name="EquityMethodInvestmentOwnershipPercentageRepresentingFairMarketValueFloorForPutAndCallOption" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="cmcsa_FilmMonetizedOnItsOwnCapitalizedCostAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvances" abstract="false" name="FilmMonetizedOnItsOwnCapitalizedCostAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvances" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_OtherIncludingCapitalLeaseObligationsMember" abstract="true" name="OtherIncludingCapitalLeaseObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentInvestmentTerm" abstract="false" name="EquityMethodInvestmentInvestmentTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cmcsa_DocumentAndEntityInformationLineItems" abstract="true" name="DocumentAndEntityInformationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_StockOptionFairValueAndSignificantAssumptionsTableTextBlock" abstract="false" name="StockOptionFairValueAndSignificantAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentManagementFeeFundingCommitment" abstract="false" name="EquityMethodInvestmentManagementFeeFundingCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_CapitalContributionToVIE" abstract="false" name="CapitalContributionToVIE" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_HuluMember" abstract="true" name="HuluMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_Increasedecreaseinfilmandtelevisioncostnet" abstract="false" name="Increasedecreaseinfilmandtelevisioncostnet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_OtherGeographicLocationsMember" abstract="true" name="OtherGeographicLocationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_EquityMethodInvestmentPercentofLosses" abstract="false" name="EquityMethodInvestmentPercentofLosses" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="cmcsa_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsTableTextBlock" abstract="false" name="ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_HomeEntertainmentMember" abstract="true" name="HomeEntertainmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_NumberOfBusinesses" abstract="false" name="NumberOfBusinesses" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cmcsa_SupplementalFinancialInformationAbstract" abstract="true" name="SupplementalFinancialInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_BroadcastTelevisionMember" abstract="true" name="BroadcastTelevisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_GuaranteedNotes9.455PercentDue2022Member" abstract="true" name="GuaranteedNotes9.455PercentDue2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_FilmAndTelevisionContentAbstract" abstract="true" name="FilmAndTelevisionContentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cmcsa_TemporaryEquityFairValueOfRedeemableSubsidiaryPreferredStock" abstract="false" name="TemporaryEquityFairValueOfRedeemableSubsidiaryPreferredStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DepreciationAndAmortizationAndGainLossOnDispositionOfAssets" abstract="false" name="DepreciationAndAmortizationAndGainLossOnDispositionOfAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_InvestmentsImpairmentPolicyTextBlock" abstract="false" name="InvestmentsImpairmentPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="cmcsa_BusinessServicesMember" abstract="true" name="BusinessServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals" abstract="false" name="FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cmcsa_DeferredCompensationPlansMember" abstract="true" name="DeferredCompensationPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="cmcsa_AccountsReceivableAllowanceForCreditLossAdditionsChargedToCostsAndExpensesAndOtherAccounts" abstract="false" name="AccountsReceivableAllowanceForCreditLossAdditionsChargedToCostsAndExpensesAndOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
