<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created with Crossfire by Rivet Software version 4.1.212.0 http://www.rivetsoftware.com-->
<!--Based on XBRL 2.1-->
<!--Created on: 8/3/2011 12:04:25 PM-->
<!--Modified on: 8/3/2011 12:04:25 PM-->
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cmcsa="http://www.comcast.com/2011-06-30" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" targetNamespace="http://www.comcast.com/2011-06-30" elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:us-types="http://fasb.org/us-types/2011-01-31">
  <annotation>
    <appinfo>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedBalanceSheet" id="StatementCondensedConsolidatedBalanceSheet">
        <link:definition>00100 - Statement - Condensed Consolidated Balance Sheet</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedStatementOfIncome" id="StatementCondensedConsolidatedStatementOfIncome">
        <link:definition>00200 - Statement - Condensed Consolidated Statement of Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedStatementOfComprehensiveIncome" id="StatementCondensedConsolidatedStatementOfComprehensiveIncome">
        <link:definition>00300 - Statement - Condensed Consolidated Statement of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedStatementOfCashFlows" id="StatementCondensedConsolidatedStatementOfCashFlows">
        <link:definition>00400 - Statement - Condensed Consolidated Statement of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureEarningsPerShareDetails" id="DisclosureEarningsPerShareDetails">
        <link:definition>40301 - Disclosure - Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsSummaryOfPreliminaryConsiderationTransferredDetails" id="DisclosureAcquisitionsSummaryOfPreliminaryConsiderationTransferredDetails">
        <link:definition>40402 - Disclosure - Acquisitions (Summary of Preliminary Consideration Transferred) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsPreliminaryAllocationOfPurchasePriceDetails" id="DisclosureAcquisitionsPreliminaryAllocationOfPurchasePriceDetails">
        <link:definition>40403 - Disclosure - Acquisitions (Preliminary Allocation of Purchase Price) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsTransactionRelatedExpensesIncludedInConsolidatedStatementOfIncomeDetails" id="DisclosureAcquisitionsTransactionRelatedExpensesIncludedInConsolidatedStatementOfIncomeDetails">
        <link:definition>40404 - Disclosure - Acquisitions (Transaction-Related Expenses Included in Consolidated Statement of Income) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCostsDetails" id="DisclosureFilmAndTelevisionCostsDetails">
        <link:definition>40501 - Disclosure - Film and Television Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCostsFilmCostsAlternativeDetails" id="DisclosureFilmAndTelevisionCostsFilmCostsAlternativeDetails">
        <link:definition>40502 - Disclosure - Film and Television Costs (Film Costs) (Alternative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCostsCostsAlternativeDetails" id="DisclosureFilmAndTelevisionCostsCostsAlternativeDetails">
        <link:definition>40503 - Disclosure - Film And Television Costs (Costs) (Alternative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsAlternativeDetails" id="DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsAlternativeDetails">
        <link:definition>40504 - Disclosure - Film And Television Costs (Film And Television Costs) (Alternative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureInvestmentsInvestmentSummaryAlternativeDetails" id="DisclosureInvestmentsInvestmentSummaryAlternativeDetails">
        <link:definition>40601 - Disclosure - Investments (Investment Summary) (Alternative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureInvestmentsInvestmentSummaryDetails" id="DisclosureInvestmentsInvestmentSummaryDetails">
        <link:definition>40601 - Disclosure - Investments (Investment Summary) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureInvestmentsInvestmentIncomeLossNetDetails" id="DisclosureInvestmentsInvestmentIncomeLossNetDetails">
        <link:definition>40602 - Disclosure - Investments (Investment Income (Loss), Net) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFairValueMeasurementsRecurringFairValueMeasuresDetails" id="DisclosureFairValueMeasurementsRecurringFairValueMeasuresDetails">
        <link:definition>41001 - Disclosure - Fair Value Measurements (Recurring Fair Value Measures) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureNoncontrollingInterestsDetails" id="DisclosureNoncontrollingInterestsDetails">
        <link:definition>41101 - Disclosure - Noncontrolling Interests (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationReceivablesDetails" id="DisclosureSupplementalFinancialInformationReceivablesDetails">
        <link:definition>41402 - Disclosure - Supplemental Financial Information (Receivables) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationPropertyAndEquipmentDetails" id="DisclosureSupplementalFinancialInformationPropertyAndEquipmentDetails">
        <link:definition>41403 - Disclosure - Supplemental Financial Information (Property and Equipment) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationOperatingCostsAndExpensesExcludingDepreciationAndAmortizationDetails" id="DisclosureSupplementalFinancialInformationOperatingCostsAndExpensesExcludingDepreciationAndAmortizationDetails">
        <link:definition>41405 - Disclosure - Supplemental Financial Information (Operating Costs and Expenses (Excluding Depreciation and Amortization)) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationAdjustmentsToReconcileNetIncomeFromConsolidatedOperationsToNetCashProvidedByOperatingActivitiesDetails" id="DisclosureSupplementalFinancialInformationAdjustmentsToReconcileNetIncomeFromConsolidatedOperationsToNetCashProvidedByOperatingActivitiesDetails">
        <link:definition>41406 - Disclosure - Supplemental Financial Information (Adjustments to Reconcile Net Income from Consolidated Operations to Net Cash Provided by Operating Activities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFinancialDataByBusinessSegmentFinancialDataByBusinessSegmentDetails" id="DisclosureFinancialDataByBusinessSegmentFinancialDataByBusinessSegmentDetails">
        <link:definition>41701 - Disclosure - Financial Data by Business Segment (Financial Data by Business Segment) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>00090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedBalanceSheetParenthetical" id="StatementCondensedConsolidatedBalanceSheetParenthetical">
        <link:definition>00105 - Statement - Condensed Consolidated Balance Sheet (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedStatementOfComprehensiveIncomeParenthetical" id="StatementCondensedConsolidatedStatementOfComprehensiveIncomeParenthetical">
        <link:definition>00305 - Statement - Condensed Consolidated Statement of Comprehensive Income (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/StatementCondensedConsolidatedStatementOfChangesInEquity" id="StatementCondensedConsolidatedStatementOfChangesInEquity">
        <link:definition>00500 - Statement - Condensed Consolidated Statement of Changes in Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatedFinancialStatements" id="DisclosureCondensedConsolidatedFinancialStatements">
        <link:definition>10101 - Disclosure - Condensed Consolidated Financial Statements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies" id="DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>10201 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureEarningsPerShare" id="DisclosureEarningsPerShare">
        <link:definition>10301 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitions" id="DisclosureAcquisitions">
        <link:definition>10401 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCosts" id="DisclosureFilmAndTelevisionCosts">
        <link:definition>10501 - Disclosure - Film and Television Costs</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureInvestments" id="DisclosureInvestments">
        <link:definition>10601 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssets" id="DisclosureGoodwillAndOtherIntangibleAssets">
        <link:definition>10701 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureLongTermDebt" id="DisclosureLongTermDebt">
        <link:definition>10801 - Disclosure - Long-Term Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstruments" id="DisclosureDerivativeFinancialInstruments">
        <link:definition>10901 - Disclosure - Derivative Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFairValueMeasurements" id="DisclosureFairValueMeasurements">
        <link:definition>11001 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureNoncontrollingInterests" id="DisclosureNoncontrollingInterests">
        <link:definition>11101 - Disclosure - Noncontrolling Interests</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosurePostretirementPensionAndOtherEmployeeBenefitPlans" id="DisclosurePostretirementPensionAndOtherEmployeeBenefitPlans">
        <link:definition>11201 - Disclosure - Postretirement, Pension and Other Employee Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureShareBasedCompensation" id="DisclosureShareBasedCompensation">
        <link:definition>11301 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformation" id="DisclosureSupplementalFinancialInformation">
        <link:definition>11401 - Disclosure - Supplemental Financial Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureReceivablesMonetization" id="DisclosureReceivablesMonetization">
        <link:definition>11501 - Disclosure - Receivables Monetization</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>11601 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFinancialDataByBusinessSegment" id="DisclosureFinancialDataByBusinessSegment">
        <link:definition>11701 - Disclosure - Financial Data by Business Segment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSubsequentEvents" id="DisclosureSubsequentEvents">
        <link:definition>11801 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformation" id="DisclosureCondensedConsolidatingFinancialInformation">
        <link:definition>11901 - Disclosure - Condensed Consolidating Financial Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicy" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicy">
        <link:definition>20202 - Disclosure - Summary of Significant Accounting Policies (Policy)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsPolicy" id="DisclosureDerivativeFinancialInstrumentsPolicy">
        <link:definition>20902 - Disclosure - Derivative Financial Instruments (Policy)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureEarningsPerShareTables" id="DisclosureEarningsPerShareTables">
        <link:definition>30303 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsTables" id="DisclosureAcquisitionsTables">
        <link:definition>30403 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFilmAndTelevisionCostsTables" id="DisclosureFilmAndTelevisionCostsTables">
        <link:definition>30503 - Disclosure - Film and Television Costs (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureInvestmentsTables" id="DisclosureInvestmentsTables">
        <link:definition>30603 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsTables" id="DisclosureGoodwillAndOtherIntangibleAssetsTables">
        <link:definition>30703 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureLongTermDebtTables" id="DisclosureLongTermDebtTables">
        <link:definition>30803 - Disclosure - Long-Term Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsTables" id="DisclosureDerivativeFinancialInstrumentsTables">
        <link:definition>30903 - Disclosure - Derivative Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFairValueMeasurementsTables" id="DisclosureFairValueMeasurementsTables">
        <link:definition>31003 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureNoncontrollingInterestsTables" id="DisclosureNoncontrollingInterestsTables">
        <link:definition>31103 - Disclosure - Noncontrolling Interests (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansTables" id="DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansTables">
        <link:definition>31203 - Disclosure - Postretirement, Pension and Other Employee Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureShareBasedCompensationTables" id="DisclosureShareBasedCompensationTables">
        <link:definition>31303 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationTables" id="DisclosureSupplementalFinancialInformationTables">
        <link:definition>31403 - Disclosure - Supplemental Financial Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureReceivablesMonetizationTables" id="DisclosureReceivablesMonetizationTables">
        <link:definition>31503 - Disclosure - Receivables Monetization (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFinancialDataByBusinessSegmentTables" id="DisclosureFinancialDataByBusinessSegmentTables">
        <link:definition>31703 - Disclosure - Financial Data by Business Segment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformationTables" id="DisclosureCondensedConsolidatingFinancialInformationTables">
        <link:definition>31903 - Disclosure - Condensed Consolidating Financial Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsNarrativeDetails" id="DisclosureAcquisitionsNarrativeDetails">
        <link:definition>40401 - Disclosure - Acquisitions (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureAcquisitionsUnauditedActualAndProFormaInformationDetails" id="DisclosureAcquisitionsUnauditedActualAndProFormaInformationDetails">
        <link:definition>40405 - Disclosure - Acquisitions (Unaudited Actual and Pro Forma Information) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsCarryingAmountOfGoodwillDetails" id="DisclosureGoodwillAndOtherIntangibleAssetsCarryingAmountOfGoodwillDetails">
        <link:definition>40701 - Disclosure - Goodwill and Other Intangible Assets (Carrying Amount of Goodwill) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsSubjectToAmortizationDetails" id="DisclosureGoodwillAndOtherIntangibleAssetsIntangibleAssetsSubjectToAmortizationDetails">
        <link:definition>40702 - Disclosure - Goodwill and Other Intangible Assets (Intangible Assets Subject to Amortization) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureLongTermDebtNarrativeDetails" id="DisclosureLongTermDebtNarrativeDetails">
        <link:definition>40801 - Disclosure - Long-Term Debt (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureLongTermDebtScheduleOfLongTermDebtInConnectionWithNbcUniversalTransactionDetails" id="DisclosureLongTermDebtScheduleOfLongTermDebtInConnectionWithNbcUniversalTransactionDetails">
        <link:definition>40802 - Disclosure - Long-Term Debt (Schedule of Long-Term Debt in Connection with NBC Universal Transaction) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsNarrativeDetails" id="DisclosureDerivativeFinancialInstrumentsNarrativeDetails">
        <link:definition>40901 - Disclosure - Derivative Financial Instruments (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsAmountOfGainLossRecognizedInIncomeFairValueHedgesDetails" id="DisclosureDerivativeFinancialInstrumentsAmountOfGainLossRecognizedInIncomeFairValueHedgesDetails">
        <link:definition>40902 - Disclosure - Derivative Financial Instruments (Amount of Gain (Loss) Recognized in Income - Fair Value Hedges) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsPretaxAmountOfGainLossRecognizedInAccumulatedOtherComprehensiveIncomeCashFlowHedgesDetails" id="DisclosureDerivativeFinancialInstrumentsPretaxAmountOfGainLossRecognizedInAccumulatedOtherComprehensiveIncomeCashFlowHedgesDetails">
        <link:definition>40903 - Disclosure - Derivative Financial Instruments (Pretax Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income - Cash Flow Hedges) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureDerivativeFinancialInstrumentsAmountOfGainLossRecognizedInIncomeNondesignatedDerivativeFinancialInstrumentsDetails" id="DisclosureDerivativeFinancialInstrumentsAmountOfGainLossRecognizedInIncomeNondesignatedDerivativeFinancialInstrumentsDetails">
        <link:definition>40904 - Disclosure - Derivative Financial Instruments (Amount of Gain (Loss) Recognized in Income - Nondesignated Derivative Financial Instruments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansNarrativeDetails" id="DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansNarrativeDetails">
        <link:definition>41201 - Disclosure - Postretirement, Pension and Other Employee Benefit Plans (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansCondensedInformationOnOurPostretirementAndPensionBenefitPlansDetails" id="DisclosurePostretirementPensionAndOtherEmployeeBenefitPlansCondensedInformationOnOurPostretirementAndPensionBenefitPlansDetails">
        <link:definition>41202 - Disclosure - Postretirement, Pension and Other Employee Benefit Plans (Condensed Information on our Postretirement and Pension Benefit Plans) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureShareBasedCompensationNarrativeDetails" id="DisclosureShareBasedCompensationNarrativeDetails">
        <link:definition>41301 - Disclosure - Share-Based Compensation (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails" id="DisclosureShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails">
        <link:definition>41302 - Disclosure - Share-Based Compensation (Recognized Share-Based Compensation Expense) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationNarrativeDetails" id="DisclosureSupplementalFinancialInformationNarrativeDetails">
        <link:definition>41401 - Disclosure - Supplemental Financial Information (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationAccumulatedOtherComprehensiveIncomeLossDetails" id="DisclosureSupplementalFinancialInformationAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>41404 - Disclosure - Supplemental Financial Information (Accumulated Other Comprehensive Income (Loss)) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSupplementalFinancialInformationCashPaymentsForInterestAndIncomeTaxesDetails" id="DisclosureSupplementalFinancialInformationCashPaymentsForInterestAndIncomeTaxesDetails">
        <link:definition>41407 - Disclosure - Supplemental Financial Information (Cash Payments for Interest and Income Taxes) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureReceivablesMonetizationNarrativeDetails" id="DisclosureReceivablesMonetizationNarrativeDetails">
        <link:definition>41501 - Disclosure - Receivables Monetization (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureReceivablesMonetizationActivitiesRelatedToSecuritizationDetails" id="DisclosureReceivablesMonetizationActivitiesRelatedToSecuritizationDetails">
        <link:definition>41502 - Disclosure - Receivables Monetization (Activities Related to the Securitization) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureReceivablesMonetizationTransferredReceivablesToOutstandingAndRetainedInterestsDetails" id="DisclosureReceivablesMonetizationTransferredReceivablesToOutstandingAndRetainedInterestsDetails">
        <link:definition>41503 - Disclosure - Receivables Monetization (Transferred Receivables to Outstanding and Retained Interests) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>41601 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureFinancialDataByBusinessSegmentCableSegmentRevenueSourcesDetails" id="DisclosureFinancialDataByBusinessSegmentCableSegmentRevenueSourcesDetails">
        <link:definition>41702 - Disclosure - Financial Data By Business Segment (Cable Segment Revenue Sources) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureSubsequentEventsNarrativeDetails" id="DisclosureSubsequentEventsNarrativeDetails">
        <link:definition>41801 - Disclosure - Subsequent Events (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformationNarrativeDetails" id="DisclosureCondensedConsolidatingFinancialInformationNarrativeDetails">
        <link:definition>41901 - Disclosure - Condensed Consolidating Financial Information (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingBalanceSheetDetails" id="DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingBalanceSheetDetails">
        <link:definition>41902 - Disclosure - Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementOfIncomeDetails" id="DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementOfIncomeDetails">
        <link:definition>41903 - Disclosure - Condensed Consolidating Financial Information (Condensed Consolidating Statement of Income) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.comcast.com/taxonomy/role/DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementOfCashFlowsDetails" id="DisclosureCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementOfCashFlowsDetails">
        <link:definition>41904 - Disclosure - Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:href="cmcsa-20110630_cal.xml" xlink:title="Calculation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:href="cmcsa-20110630_def.xml" xlink:title="Definition Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:href="cmcsa-20110630_lab.xml" xlink:title="Label Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:href="cmcsa-20110630_pre.xml" xlink:title="Presentation Links, all" />
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://fasb.org/us-types/2011-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2011/elts/us-types-2011-01-31.xsd" />
  <import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2011-01-31" schemaLocation="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/invest/2011-01-31" schemaLocation="http://xbrl.sec.gov/invest/2011/invest-2011-01-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <import namespace="http://fasb.org/us-gaap/2011-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd" />
  <element id="cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests" name="ContributionsFromAndDistributionsToNoncontrollingInterests" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_EquityProfitLoss" name="EquityProfitLoss" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element name="InvestmentsTextBlock" id="cmcsa_InvestmentsTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" />
  <element id="cmcsa_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_AcquisitionsAndOtherSignificantEventsAbstract" name="AcquisitionsAndOtherSignificantEventsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_FairValueAssetsMeasuredOnRecurringBasisTotal" name="FairValueAssetsMeasuredOnRecurringBasisTotal" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements" name="DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_FairValueLiabilitiesMeasuredOnRecurringBasis" name="FairValueLiabilitiesMeasuredOnRecurringBasis" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_InterestRateSwapAgreementsLongTermDebtPortionMember" name="InterestRateSwapAgreementsLongTermDebtPortionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ChangesFromNetIncomeAttributableToParent" name="ChangesFromNetIncomeAttributableToParent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_OtherNonCashIncomeExpense" name="OtherNonCashIncomeExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_CorporateAndOtherMember" name="CorporateAndOtherMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_EliminationsMember" name="EliminationsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_EquityWarrantsFairValueDisclosure" name="EquityWarrantsFairValueDisclosure" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_FairValueOfEmbeddedDerivativeLiabilityComponentOfZonesDebt" name="FairValueOfEmbeddedDerivativeLiabilityComponentOfZonesDebt" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_EquityMethodInvestmentsInStockAndOther" name="EquityMethodInvestmentsInStockAndOther" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements" name="MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_RedeemableNonControllingInterestsMember" name="RedeemableNonControllingInterestsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ClassSpecialCommonStockMember" name="ClassSpecialCommonStockMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest" name="IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_OperatingIncomeExcludingDepreciationAndAmortization" name="OperatingIncomeExcludingDepreciationAndAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_PercentageAdjustmentFactorToDetermineRedemptionAndPurchasePriceForNoncontrollingInvestorsInterest" name="PercentageAdjustmentFactorToDetermineRedemptionAndPurchasePriceForNoncontrollingInvestorsInterest" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AmountUsedForDeterminingRedemptionAndPurchasePrice" name="AmountUsedForDeterminingRedemptionAndPurchasePrice" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_ParentsCashOrCommonstockFundingCommitmentForEachOfNoncontrollingInvestorsTwoRedemptionRights" name="ParentsCashOrCommonstockFundingCommitmentForEachOfNoncontrollingInvestorsTwoRedemptionRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_OtherInvestmentIncomeLossNet" name="OtherInvestmentIncomeLossNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_PrepaidForwardSaleAgreementsSecuritiesMember" name="PrepaidForwardSaleAgreementsSecuritiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_PrepaidForwardSaleAgreementDerivativeMember" name="PrepaidForwardSaleAgreementDerivativeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CondensedInformationOnOurPostretirementAndPensionBenefitPlansTextBlock" name="CondensedInformationOnOurPostretirementAndPensionBenefitPlansTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_DeferredGainsLossesOnCashFlowHedges" name="DeferredGainsLossesOnCashFlowHedges" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_GeMember" name="GeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet" name="GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_UnrealizedGainsLossesOnSecuritiesUnderlyingPrepaidForwardSaleAgreements" name="UnrealizedGainsLossesOnSecuritiesUnderlyingPrepaidForwardSaleAgreements" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_ForeignExchangeRiskMember" name="ForeignExchangeRiskMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNextTwelveMonthsNetOfDeferredTaxes" name="InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNextTwelveMonthsNetOfDeferredTaxes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_TotalGainLossRecognizedInAccumulatedOtherComprehensiveIncome" name="TotalGainLossRecognizedInAccumulatedOtherComprehensiveIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_DesignatedPrepaidForwardSaleAgreementsMember" name="DesignatedPrepaidForwardSaleAgreementsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CondensedConsolidatedFinancialStatementsAbstract" name="CondensedConsolidatedFinancialStatementsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_FilmAndTelevisionCostsPolicyTextBlock" name="FilmAndTelevisionCostsPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ProgrammingRightsCurrent" name="ProgrammingRightsCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_AccruedParticipationsAndResidualsCurrent" name="AccruedParticipationsAndResidualsCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_HuluMember" name="HuluMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_WeatherChannelMember" name="WeatherChannelMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_UniversalCityDevelopmentPartnersMember" name="UniversalCityDevelopmentPartnersMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AndETelevisionNetworksLimitedLiabilityCorporationMember" name="AndETelevisionNetworksLimitedLiabilityCorporationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorSecuredNoteDueInTwoThousandTwentyThreeMember" name="SeniorSecuredNoteDueInTwoThousandTwentyThreeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NumberOfThemeParks" name="NumberOfThemeParks" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_DebtInstrumentMaturityPeriod" name="DebtInstrumentMaturityPeriod" nillable="true" type="us-types:dateStringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationFilmAndTelevisionCost" name="BusinessAcquisitionPurchasePriceAllocationFilmAndTelevisionCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_ScheduleOfAcquisitionRelatedExpensesIncludedInConsolidatedStatementOfIncomeTableTextBlock" name="ScheduleOfAcquisitionRelatedExpensesIncludedInConsolidatedStatementOfIncomeTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_MsnbcComMember" name="MsnbcComMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableNetworksMember" name="CableNetworksMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_BroadcastTelevisionMember" name="BroadcastTelevisionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FilmedEntertainmentMember" name="FilmedEntertainmentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ThemeParksMember" name="ThemeParksMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FilmAndTelevisionCostsDisclosureTextBlock" name="FilmAndTelevisionCostsDisclosureTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ProgrammingRightsLessAmortization" name="ProgrammingRightsLessAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_ScheduleOfAdjustmentsToReconcileNetIncomeFromConsolidatedOperationsToNetCashProvidedByOperatingActivitiesTableTextBlock" name="ScheduleOfAdjustmentsToReconcileNetIncomeFromConsolidatedOperationsToNetCashProvidedByOperatingActivitiesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ProgrammingAndProductionCosts" name="ProgrammingAndProductionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_ChangeInFilmAndTelevisionCosts" name="ChangeInFilmAndTelevisionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" name="TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_MatchingContributionsPercentage" name="MatchingContributionsPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2015Member" name="SeniorNotesDue2015Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2020Member" name="SeniorNotesDue2020Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2040Member" name="SeniorNotesDue2040Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2014Member" name="SeniorNotesDue2014Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2016Member" name="SeniorNotesDue2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2021Member" name="SeniorNotesDue2021Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDue2041Member" name="SeniorNotesDue2041Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CondensedConsolidatingFinancialInformationAbstract" name="CondensedConsolidatingFinancialInformationAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_ScheduleOfCondensedConsolidatingBalanceSheetTextBlock" name="ScheduleOfCondensedConsolidatingBalanceSheetTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ScheduleOfCondensedConsolidatingStatementOfOperationsTextBlock" name="ScheduleOfCondensedConsolidatingStatementOfOperationsTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ScheduleOfCondensedConsolidatingStatementOfCashFlowsTextBlock" name="ScheduleOfCondensedConsolidatingStatementOfCashFlowsTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastHoldings1058SeniorSubordinatedDebenturesDue2012Member" name="ComcastHoldings1058SeniorSubordinatedDebenturesDue2012Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastHoldingsZonesDueOctober2029Member" name="ComcastHoldingsZonesDueOctober2029Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastHoldingsZonesDueNovember2029Member" name="ComcastHoldingsZonesDueNovember2029Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CombinedCchmoParentsMember" name="CombinedCchmoParentsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastHoldingsMember" name="ComcastHoldingsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CcclParentMember" name="CcclParentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastNonGuarantorSubsidiariesMember" name="ComcastNonGuarantorSubsidiariesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NetTransactionsWithAffiliates" name="NetTransactionsWithAffiliates" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_OtherStockholdersEquity" name="OtherStockholdersEquity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_InvestmentsInAndAmountsDueFromSubsidiariesEliminatedUponConsolidation" name="InvestmentsInAndAmountsDueFromSubsidiariesEliminatedUponConsolidation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_AggregateCashOrCommonStockFundingCommitmentForNonControllingInvestorRedemptionRights" name="AggregateCashOrCommonStockFundingCommitmentForNonControllingInvestorRedemptionRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_FilmAndTelevisionCosts" name="FilmAndTelevisionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_RestrictedStockUnitsRsuMember" name="RestrictedStockUnitsRsuMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_OwnershipPercentageInNewCompany" name="OwnershipPercentageInNewCompany" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cmcsa_DebtIssuanceOfAcquiredCompanyPriorToCloseOfTransaction" name="DebtIssuanceOfAcquiredCompanyPriorToCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_RepaymentOfDebtOfAcquiredCompanyPriorToCloseOfTransaction" name="RepaymentOfDebtOfAcquiredCompanyPriorToCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_ReleasedLessAmortization" name="ReleasedLessAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_FilmAndTelevisionAxis" name="FilmAndTelevisionAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_FilmAndTelevisionDomain" name="FilmAndTelevisionDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FilmCostsMember" name="FilmCostsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_TelevisionCostsMember" name="TelevisionCostsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CostMethodInvestmentOwnershipPercentage" name="CostMethodInvestmentOwnershipPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SupplementalFinancialInformationTextBlock" name="SupplementalFinancialInformationTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_HeadquartersAndOtherMember" name="HeadquartersAndOtherMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FilmAndTelevisionCostsAbstract" name="FilmAndTelevisionCostsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_CompletedAndNotReleased" name="CompletedAndNotReleased" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_InProductionAndInDevelopment" name="InProductionAndInDevelopment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_TelevisionCosts" name="TelevisionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_FilmCostsAndTelevisionCostsAbstract" name="FilmCostsAndTelevisionCostsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsMember" name="CableCommunicationsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastContentBusinessMember" name="ComcastContentBusinessMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NbcuniversalAcquiredBusinessesMember" name="NbcuniversalAcquiredBusinessesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FilmAndTelevisionCostsTable" name="FilmAndTelevisionCostsTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_NbcUniversalHoldingsMember" name="NbcUniversalHoldingsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComcastContentMember" name="ComcastContentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_GuaranteeObligationsCurrentPrincipalBalance" name="GuaranteeObligationsCurrentPrincipalBalance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_PrincipalAmountMaturityYear" name="PrincipalAmountMaturityYear" nillable="true" type="us-types:dateStringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NbcuniversalEliminationsMember" name="NbcuniversalEliminationsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NbcuniversalMember" name="NbcuniversalMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CashPaidToAcquireEntityIncludingTransactionCosts" name="CashPaidToAcquireEntityIncludingTransactionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_CashDistributionToPriorOwnerPriorToCloseOfTransaction" name="CashDistributionToPriorOwnerPriorToCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_DeferredTaxOnExchangeTransaction" name="DeferredTaxOnExchangeTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationIntangibleAssets" name="BusinessAcquisitionPurchasePriceAllocationIntangibleAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_BusinessAcquisitionCostOfAcquiredEntity" name="BusinessAcquisitionCostOfAcquiredEntity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_TransactionRelatedCosts" name="TransactionRelatedCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_FairValueOfRedeemableNoncontrollingInterestAssociatedWithNetAssetsAcquired" name="FairValueOfRedeemableNoncontrollingInterestAssociatedWithNetAssetsAcquired" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_FilmAndTelevisionLibraryCostsAmortizedInCurrentPeriod" name="FilmAndTelevisionLibraryCostsAmortizedInCurrentPeriod" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_FilmAndTelevisionLibraryCostsUnamortized" name="FilmAndTelevisionLibraryCostsUnamortized" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_IntangibleAssetsGross" name="IntangibleAssetsGross" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_NotesDue2011At675Member" name="NotesDue2011At675Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NotesDue2011At55Member" name="NotesDue2011At55Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FairValueOfForeignExchangeContractsThatWereDesignatedAsCashFlowHedges" name="FairValueOfForeignExchangeContractsThatWereDesignatedAsCashFlowHedges" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_TotalChangeInAccumulatedOtherComprehensiveIncome" name="TotalChangeInAccumulatedOtherComprehensiveIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_NondesignatedPrepaidForwardSaleAgreementsMember" name="NondesignatedPrepaidForwardSaleAgreementsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ZonesMember" name="ZonesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_DefinedContributionsEmployeeContributionPercentageMatching" name="DefinedContributionsEmployeeContributionPercentageMatching" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FairValueOfRestrictedShareUnitsGranted" name="FairValueOfRestrictedShareUnitsGranted" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AnnualManagementGrantProgramShareBasedCompensationMember" name="AnnualManagementGrantProgramShareBasedCompensationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_FairValueOfStockOptionsGranted" name="FairValueOfStockOptionsGranted" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_RestrictedShareUnitsGranted" name="RestrictedShareUnitsGranted" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_StockOptionsGranted" name="StockOptionsGranted" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CurrentMember" name="CurrentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NoncurrentMember" name="NoncurrentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ReturnsAndIncentivesAllowance" name="ReturnsAndIncentivesAllowance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_AmortizationOfFilmAndTelevisionCosts" name="AmortizationOfFilmAndTelevisionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_ReceivablesMonetizationTextBlock" name="ReceivablesMonetizationTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ScheduleOfMonetizationBalancesTableTextBlock" name="ScheduleOfMonetizationBalancesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_MonetizationCollectionsOwedUnderProgram" name="MonetizationCollectionsOwedUnderProgram" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_ActivitiesRelatedToSecuritizationProgramsTableTextBlock" name="ActivitiesRelatedToSecuritizationProgramsTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_EquityInterestPercentage" name="EquityInterestPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_VotingInterestPercentage" name="VotingInterestPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_DebtOfUnconsolidatedVie" name="DebtOfUnconsolidatedVie" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_CollateralLiabilityForUnconsolidatedSubsidiaryDebt" name="CollateralLiabilityForUnconsolidatedSubsidiaryDebt" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_ReclassificationsOfPriorYearAmountsPolicyTextBlock" name="ReclassificationsOfPriorYearAmountsPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationInvestments" name="BusinessAcquisitionPurchasePriceAllocationInvestments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_DirectTransactionCosts" name="DirectTransactionCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_TransactionCostsAndTransactionRelatedCostsInOperatingCostsAndExpenses" name="TransactionCostsAndTransactionRelatedCostsInOperatingCostsAndExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_TransactionCostsInInterestExpense" name="TransactionCostsInInterestExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_TotalTransactionCostsAndTransactionRelatedCosts" name="TotalTransactionCostsAndTransactionRelatedCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_NonUSRevenue" name="NonUSRevenue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_NoncontrollingInterestIncreaseDecreaseRelatedToAcquisition" name="NoncontrollingInterestIncreaseDecreaseRelatedToAcquisition" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_ParentOwnershipPercentageInHoldingCompanySubsidiaries" name="ParentOwnershipPercentageInHoldingCompanySubsidiaries" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_PurchaseOfUcdpMember" name="PurchaseOfUcdpMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_RevenueAttributableToAcquiredCompany" name="RevenueAttributableToAcquiredCompany" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_SupplementalFinancialInformationAbstract" name="SupplementalFinancialInformationAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cmcsa_ScheduleOfFilmAndTelevisionCostsTableTextBlock" name="ScheduleOfFilmAndTelevisionCostsTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_BusinessAcquisitionProFormaProfitLoss" name="BusinessAcquisitionProFormaProfitLoss" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapital" name="BusinessAcquisitionPurchasePriceAllocationWorkingCapital" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities" name="BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_BusinessAcquisitionPurchasePriceAllocationNonControllingInterestAcquired" name="BusinessAcquisitionPurchasePriceAllocationNonControllingInterestAcquired" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_InvestmentSummaryTableTextBlock" name="InvestmentSummaryTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_ComponentsOfInvestmentIncomeLossNetTableTextBlock" name="ComponentsOfInvestmentIncomeLossNetTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_PreAmendmentRevolvingCreditFacilityMember" name="PreAmendmentRevolvingCreditFacilityMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AmountOfGainLossRecognizedInIncomeFairValueHedgesTableTextBlock" name="AmountOfGainLossRecognizedInIncomeFairValueHedgesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AmountOfGainLossRecognizedInIncomeNonDesignatedTableTextBlock" name="AmountOfGainLossRecognizedInIncomeNonDesignatedTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_RecognizedShareBasedCompensationExpenseTableTextBlock" name="RecognizedShareBasedCompensationExpenseTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_AdditionalOwnershipPercentageInNewCompany" name="AdditionalOwnershipPercentageInNewCompany" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cmcsa_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastFiscalQuarter" name="BusinessAcquisitionRevenueReportedByAcquiredEntityForLastFiscalQuarter" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_TotalAssetsOfAcquiredCompanyPriorToCloseOfTransaction" name="TotalAssetsOfAcquiredCompanyPriorToCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageFranchiseAndOtherRegulatoryFeesMember" name="CableCommunicationsSegmentRevenuePercentageFranchiseAndOtherRegulatoryFeesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageVideoMember" name="CableCommunicationsSegmentRevenuePercentageVideoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageHighSpeedInternetMember" name="CableCommunicationsSegmentRevenuePercentageHighSpeedInternetMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentagePhoneMember" name="CableCommunicationsSegmentRevenuePercentagePhoneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageAdvertisingMember" name="CableCommunicationsSegmentRevenuePercentageAdvertisingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageBusinessServiceMember" name="CableCommunicationsSegmentRevenuePercentageBusinessServiceMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenuePercentageOtherMember" name="CableCommunicationsSegmentRevenuePercentageOtherMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_DebtBalanceOfAcquiredCompanyPriorToCloseOfTransaction" name="DebtBalanceOfAcquiredCompanyPriorToCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_PostAmendmentRevolvingCreditFacilityMember" name="PostAmendmentRevolvingCreditFacilityMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesAndSeniorSubordinatedNotesMember" name="SeniorNotesAndSeniorSubordinatedNotesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_UdcpMember" name="UdcpMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorNotesDueInTwoThousandFifteenMember" name="SeniorNotesDueInTwoThousandFifteenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_SeniorSubordinatedNotesDueInTwoThousandSixteenMember" name="SeniorSubordinatedNotesDueInTwoThousandSixteenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_OperatingCostAndExpense" name="OperatingCostAndExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_TransactionCostsInOtherIncomeExpense" name="TransactionCostsInOtherIncomeExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_FairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSalesAgreements" name="FairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSalesAgreements" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_ChangesInEquityResultingFromNetIncomeAttributableToParentAndTransfersToOrFromNoncontrollingInterestsTableTextBlock" name="ChangesInEquityResultingFromNetIncomeAttributableToParentAndTransfersToOrFromNoncontrollingInterestsTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_PurchasePriceToAcquireNoncontrollingInterest" name="PurchasePriceToAcquireNoncontrollingInterest" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cmcsa_CarryingValueOfNoncontrollingInterestAcquired" name="CarryingValueOfNoncontrollingInterestAcquired" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_CableCommunicationsTechnicalLabor" name="CableCommunicationsTechnicalLabor" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_CableCommunicationsCustomerService" name="CableCommunicationsCustomerService" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_OtherOperatingCostsAndExpenses" name="OtherOperatingCostsAndExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cmcsa_NumberOfCollectiveBargainingAgreementsExpiredOrScheduleToExpireByEndOfYear" name="NumberOfCollectiveBargainingAgreementsExpiredOrScheduleToExpireByEndOfYear" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_NumberOfEmployeesCoveredUnderCollectiveBargainingAgreementsExpiredOrScheduleToExpireByEndOfYear" name="NumberOfEmployeesCoveredUnderCollectiveBargainingAgreementsExpiredOrScheduleToExpireByEndOfYear" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenueTypesAsPercentageOfTotalCableCommunicationsRevenue" name="CableCommunicationsSegmentRevenueTypesAsPercentageOfTotalCableCommunicationsRevenue" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_CableCommunicationsSegmentRevenueSourcesTableTextBlock" name="CableCommunicationsSegmentRevenueSourcesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cmcsa_RemainingEquityInterestInEquityMethodInvestment" name="RemainingEquityInterestInEquityMethodInvestment" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cmcsa_TotalCostOfAcquiredEntity" name="TotalCostOfAcquiredEntity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cmcsa_OutstandingDebtOfAcquiredCompanyImmediatelyFollowingCloseOfTransaction" name="OutstandingDebtOfAcquiredCompanyImmediatelyFollowingCloseOfTransaction" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_AggregatePrincipalAmountOfNotesRedeemed" name="AggregatePrincipalAmountOfNotesRedeemed" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_AggregatePrincipalAmountOfNotesOutstandingAfterRedemption" name="AggregatePrincipalAmountOfNotesOutstandingAfterRedemption" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterestRounded" name="IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterestRounded" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cmcsa_IntercompanyNote" name="IntercompanyNote" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
</schema>
