CMCSA


Line plots across dimensions of each concept
Tables

Table of contents


us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical

us-gaap:CostsAndExpenses

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:ProfitLoss

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:Assets
us-gaap:ConsolidatedEntities, us-gaap:Ownership

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ShortTermInvestments

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:LongTermInvestments

us-gaap:Goodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:DebtCurrent

us-gaap:AccountsPayableCurrent

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensation

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ProceedsFromRepaymentsOfShortTermDebt

cmcsa:AdjustedEBITDA
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
cmcsa:CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
cmcsa:CapitalContributionToVIE

cmcsa:ChangeInCurrentAndNoncurrentReceivablesNet
us-gaap:StatementEquityComponents
cmcsa:ContributionsFromAndDistributionsToNoncontrollingInterests
us-gaap:StatementEquityComponents
cmcsa:ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity

cmcsa:DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock

cmcsa:GainLossOnInvestmentsAndOtherNoncashIncomeLossNet

cmcsa:Increasedecreaseinfilmandtelevisioncostnet

cmcsa:NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock

cmcsa:NoncashInterestExpenseIncomeNet

cmcsa:OtherIncomeLossNet

cmcsa:OtherOperatingAndAdministrative

cmcsa:PaymentsForConstructionOfThemePark

cmcsa:ProceedsFromSalesOfBusinessesAndInvestments

cmcsa:ProgrammingAndProductionCosts

cmcsa:TransactionRelatedCosts
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType

us-gaap:AmortizationOfIntangibleAssets

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:Depreciation

us-gaap:DepreciationAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStockCash

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EquitySecuritiesFvNiGainLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestPaidNet

us-gaap:MarketingAndAdvertisingExpense
us-gaap:StatementEquityComponents
us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireIntangibleAssets
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:RepaymentsOfOtherDebt
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents
us-gaap:TemporaryEquityOtherChanges

cmcsa:AccruedParticipationsAndResidualsCurrent
dei:LegalEntity
cmcsa:CarryingAmountOfRedeemablePreferredStock

cmcsa:CollateralizedObligation

cmcsa:EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostCurrent

cmcsa:FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent

cmcsa:InvestmentSecuringCollateralizedObligation
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableNetNoncurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AociLossCashFlowHedgeCumulativeGainLossAfterTax

us-gaap:CapitalizedContractCostNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredRevenueNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesFvNi
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:HeldToMaturitySecuritiesCurrent

us-gaap:IndefiniteLivedFranchiseRights
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:Investments

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:OtherIntangibleAssetsNet

us-gaap:OtherInvestments

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
us-gaap:StatementEquityComponents

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashNoncurrent
us-gaap:StatementClassOfStock
us-gaap:TreasuryStockShares

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█████████████▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁5454545454545454555555565628282829292525252525252525252525252525252525252424NANANA24NANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassA█████████████▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁54275416541254085401538954125445548055075537557656062802281928382854286924652480248824962515251525112503250124992494248724842480247524602458245524492437NANANA2428NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA██▇▇▇▇▇██████▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁45544543453945354529451745404572460746354664470347332366238324022417243221002114212221312150214921462138213621332129212221182114210920952092208920842071NANANA2063NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄99999999999999999999999999999999999999NANANA9NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 4617NA461946074594NA461946434705NA477748094832NA243124462462NA250225312556NA261626282645NA265826662675NA270327172744NA276127892805NA281028222837NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 4562NA455145474534NA456445984633NA469847284747NA240324202434NA247225002520NA258025942603NA262226312634NA266826872708NA273927592772NA280228162829NANANANA
us-gaap:EarningsPerShareBasic ▁▂▂▂▂▂▂▂▂█▂▂▂▃▃▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁0.470.690.710.690.780.550.630.70.673.220.560.530.540.960.930.840.880.80.810.850.820.751.00.770.720.730.660.660.550.570.790.50.450.470.330.370.340.370.310.310.310.330.330.330.27
us-gaap:EarningsPerShareDiluted ▁▂▂▂▂▂▂▂▂█▂▂▂▃▃▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁0.460.680.70.680.770.550.620.690.663.170.550.520.530.950.920.830.870.790.80.840.810.740.990.760.710.720.650.650.540.560.780.50.450.470.330.370.340.360.310.310.310.330.330.330.27
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Revenues ▇█▇▇▇█▆▆▆▆▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▄▄▃▃▃▃▃▂▁▁▁▁▁▁▁▁2660928398268272685826859278462213521735227912191520983211652046321025213191926918790192451866918743178531773216791168441740816926161511627015310159371654415211148781504214339143331212897219489952592029067884589788866
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:DirectToConsumer,cmcsa:SkyLimited3679NANANA3834NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:ResidentialHighSpeedInternet,cmcsa:CableCommunications5001NANANA4577NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:ResidentialVideo,cmcsa:CableCommunications5632NANANA5628NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:BroadcastTelevision▄▆▂▃▃▆▃▃█▅▁▂▂▅▆▁▁26843162223024022467309924522391349729642133224122082848308721282084NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:CableCommunications██▇▇▆▆▅▅▄▄▄▃▃▃▂▂▁1491814768145841445014280141281378713710135181328213203131221291212843125571244412204NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:CableNetworks▅▅▄▆▅▄▅▅█▃▂▃▃▁▆▂▁28592927277129472868277928842916319426912603269626412503294225662453NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:NBCUniversalSegments7734NANANA8313NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:SkyLimited▁█▁▅▅45175040455448284797NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments cmcsa:NBCUniversalSegments▃▇▄▄▄▇▅▄█▆▄▅▃▅▇▁7734915382958206831392938625831395308784801483317853845191787103NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementGeographical country:US▆█▅▅▅▇▅▄▆▅▂▂▁20690215582039820539204572117320244199312088520199191421907318832NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementGeographical srt:Europe▇█▇▇██▁▁▁503356755211529753705376825699821NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▇█▇▇▇█▄▄▅▅▄▄▃▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▂▁▁217572315121487215022167723332172991672118146178081619116607159331676116879152031470115243146681463813963139451304613040138401327912737128351224312643134961213212120NA11698113959904NA753574477267NANANANA
us-gaap:OperatingIncomeLoss ▇████▆▇▇▇▆▇▆▆▆▆▆▆▅▅▆▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▂▁▂▁▁▁▁▁485252475340535651824514483650144645410747924558453042644440406640894002400141053890378737453804356836473414343530673294304830792758291826412938222420131954207819351817171118751811
us-gaap:InterestExpense █▇▇▇▇▇▃▃▃▃▃▃▃▃▃▂▂▂▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁121211131167113711501129830806777807766758755756751732703674659713656664663648642646639636653623633625640NA637621605NA545543524NANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▁█▃▄▆▃▄▄▅▄▄▄▅▄▄▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄-21572278-1144-566807-797-103-173157-1920-11157-43045249238-51-2527-40-34-16102-68-14-17-1017-92NANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▃▆▆▆█▃▆▇▆▄▆▆▆▅▅▄▅▄▄▅▄▄▃▄▃▃▃▃▂▂▇▂▁292440614063416447083068389542853994342240963899390537363724335835353218326434883402311030403259305629542799279225702585438324442197NA180523811635NA14541474NANANANANA
us-gaap:NonoperatingIncomeExpense ▁▃▃▃▆▃▃▄▄▁▁▁▂▂▁▁▂▁▁▂▂▁▁▂▂▁▂▁▂▁█▁▂-716-73-110-55676-317-11177126-685-696-659-625-528-716-708-554-784-737-617-488-677-705-545-512-693-615-643-497-7091335-635-561NA-836-557-589NA-500-604-465NANANANA
us-gaap:IncomeTaxExpenseBenefit █████████▁████████████▇██████████70086177596110764869991077818-1161314131364125813191400127813111162122313131261111440712341118986102110489257781405811750NA6391014596NA584588591NANANANA
us-gaap:IncomeTaxesPaidNet ▂▃▄▆▁▄▄▂▁▃▅█▁▄▄▆▁▃▅▇▁▃▄▇▁▃▄▇▂▄▄▄▁281741856144518982291046116264212062077132977103114951905811146188111879097417181867669581761461986833904118NA59649674NA668108046NANANANA
us-gaap:ProfitLoss ▁▂▂▂▂▂▂▂▂█▂▂▂▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▂▁▁2224320032883203363225822896320831761503526832535264724172324208022242056204121752141199626332025193819681778174416451807297816331447NA116613671039NA870886879NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▁▄▂▂▃▂▂▂▃█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂-44536821202641434317692799306932711498326032405281023602270211322241992196721592017177626091945184820791545182214371581223513261228NA8661014945NA837845865NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▁▄▂▂▃▂▂▂▃█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂8541821682707443218442789303233331502726412422297822342391231524512048201221972099184726501978191521341591183216361868311616031451NA111813571043NA840847878NANANANA
us-gaap:NetIncomeLoss ▂▂▂▂▂▂▂▂▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁2147316232173125355325112886321631181498526502513256622962237202821341971199621372059192525921992187119131732173414371518211313481224128790810229431018867884866955944967772
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings2147NANANA3553NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest10NANANA51NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets █████▇▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁262421263414256374256555256189251684200635191248190876186949185301183031182479180500177924171985170599166574158958159674158757159339159237157459157773158813156595156819156364164971162454157688157949157818156827154782154259118534NANANA112733NANANA
us-gaap:LiabilitiesAndStockholdersEquity █████▇▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁262421263414256374256555256189251684200635191248190876186949185301183031182479180500177924171985170599166574158958159674158757159339159237157459157773158813156595156819156364164971162454157688157949157818156827154782154259118534NANANA112733NANANA
us-gaap:StockholdersEquity ██▇▇▇▆▆▆▆▅▃▃▃▃▃▃▃▂▂▂▂▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁8150682726781447685074959716137152370694694826860655427550055505953943534815309852642522695171652400521715271153298519715126850694497184909148190493564889247731474764727446683466434632844354NANANA42721NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▇█▇▆▆▇▇▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▄▃▄▄▃▃▃▆▅▂▂▁▁▁▁▂2408425392223232136120273218482320618215187531606015960148321524516361152281477715180123031150113319129211353113936127721404314075134071273511783199911806611354935585738582835075478886NANANA3223NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆▄▃▃▃▃█▄▅▃▃▂▃▃▂▄▄▂▂▃▃▃▄▂▃▂▂▁▂█▇▂▂▂▂▂▂▅▄▃▃▁8516550035073919349838141061657266030342841142693402233012807466556282295189334863937391045471529305417181603138918391095188992101220716201806199718225984454240283483671NANANA
us-gaap:ShortTermInvestments ▄▄▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▅▅▇█▇▆▃▃▅▁▁▁▁▁▁1703170917101718869487821519133311975493751061371441586025312325238935734132376528411464140122312285446647481NANANA50NANANA
us-gaap:AccountsReceivableNetCurrent ██████▆▆▆▆▅▅▅▆▅▅▄▅▄▅▄▄▄▄▄▄▄▄▃▄▃▃▃▃▃▃▂▁10800112921068410835107361110489838847875985467915784975257955753367086375689665277016614463216172623261516376550155075063552151234387437943514096415637081855NANANA1711NANANA
us-gaap:OtherAssetsCurrent ████▅▅▄▄▄▄▃▄▄▃▆▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▃▂▂▂▂▁4768472346754660309731842384242326102464215226572219208335191969178717931814182617371859169417811586148012121215113911461606152117581615162512421167792NANANA551NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ████▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▁▁5356653239529835246751932513065093450731503934991649943499514999149694495404911948611481004746046738460374541044821441864338142574418164108940277394253868837980372753652835515345053350332505NANANA27810NANANA
us-gaap:PropertyPlantAndEquipmentNet ███▇▇▇▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁4844248322467904604745721444373985539355390683847037856371713662636253356563489634122336653217031572311273095330362299702958829840288062825528219272322698426891269622755927441246192491123515NANANA23855NANANA
us-gaap:LongTermInvestments ▄▅▅▆▇▅▅▅▅▅▄▄▄▃▂▂▂▁▁▁▁▁▁▁▁▂▂▃▃▄▄▅▇▇▇██▄64686989747384389159788377247438709569316695652159385247385736793638322433232999323531353129307230903770367252995433632559518018101499854957510829107116670NANANA5947NANANA
us-gaap:Goodwill ██████▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁6721868725669136794568073661543670336872371473678036752367423659235980366523379233458329452749227422273022731627323273232710327098270792707526996269852708827010268032687426831269192700114958NANANA14933NANANA
us-gaap:OtherAssetsNoncurrent █████▅▇▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁91758866888387708645580277563744370734893145289927322769265824622237227225002445231923332474251723822343234523112332218021842145220321902201212619771461NANANA1218NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesCurrent ▇█▆█▇▇▅▄▄▅▅▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▂▃▁276003029225989310082791727603196271900719179215612144922276190742153518038176011908418178173591756518502174101708417375178031891218666186021801816714173351574215632132411414612697137478234NANANA7249NANANA
us-gaap:DebtCurrent ▄▅▁█▆▅▄▃▄▆▇█▄▇▄▃▅▄▄▅▅▅▄▄▃▄▃▃▂▃▃▄▃▁▃▁▃▂29734452103963654629439831732634303951345241635835095480333329344119362731523887418042173523294728193280233725352177237627992954270513672448135022961800NANANA1156NANANA
us-gaap:AccountsPayableCurrent ▇█▇▇▇▆▄▄▅▄▄▄▄▄▄▄▄▄▄▃▄▃▃▃▃▃▄▄▃▄▄▃▃▃▃▂▂▁996310826101981001410232849470366940734969266976673066586915659463596333621559965880615756385680543255345528603260775750620662505730576357055455483848583291NANANA3094NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:MinorityInterest ▄▄▄▄▃▃▃▄▄▃▃▃█▇▇▇▆▆▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁1277114810169809038898221049122884383684325892231234221781870170924932934035735536136436441639546144044944834538132926227980NANANA90NANANA
us-gaap:OtherLiabilitiesNoncurrent ▇▇▇▇█▆▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▅▅▄▃▄▃▁171441676516853171441881115329124681206911253109041091410837106771092511119107191043110637106941043810837108191038811241111091138411493124611264013271128601343213446130341165711985116177862NANANA6767NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ██▇▇▇▆▆▆▆▅▃▃▃▃▃▃▃▂▂▂▂▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁8150682726781447685074959716137152370694694826860655427550055505953943534815309852642522695171652400521715271153298519715126850694497184909148190493564889247731474764727446683466434632844354NANANA42721NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ██▇▇▇▆▆▆▆▆▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁827838387479160778307586272502723457174370710694495626355848576485617455823552765451253978519655272952511530685365352332516325105850134494864865149796493414817947821476554701246905466074443443868435244317942811NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▃▃▂▂▁▁▁▁▁▁▁▁▂▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▇▇▇▇▇▇██▅▅▆▆▆385973844738196379503762137461373943742737375374973752937478381153825838426384693846438518385163874138660388053897739040389853889038991389913895740547406524076140893409404107941301414073978039860399824009740247NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:RetainedEarnings███▇▇▆▆▆▆▆▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁515165069548570464254437941983412184026938961381922497924560240632307622510221172175021413208832131321186215392180520432197371923518324175091673016280157741462614217139711323612932125041215811525110261051710005NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█████████████▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁5454545454545454555555565628282829292525252525252525252525252525252525252424NANANA24NANANA
us-gaap:AdditionalPaidInCapital ▃▃▂▂▁▁▁▁▁▁▁▁▂▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▇▇▇▇▇▇██▅3859738447381963795037621374613739437427373753749737529374783811538258384263846938464385183851638741386603880538977390403898538890389913899138957405474065240761408934094041079413014140739780NANANA40247NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▆▆▆▆▆▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁5151650695485704642544379419834121840269389613819224979245602406323076225102211721750214132088321313211862153921805204321973719235183241750916730162801577414626142171397113236129321250412158NANANA10005NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁█▁▄▆▄▆▆▇▆▆▆▆▅▅▅▄▄▄▄▄▄▅▅▅▅▄▅▅▅▅▄▄▄▄▄▄▄▄▄▅▅-11441047-1159-62422-36837446160837938142834298341-84-174-195-166-188-1463-143356-11077-1115-48-170-148-152-147-105-97-99-116-86-47-46NANANA
us-gaap:MinorityInterest ▄▄▄▄▃▃▃▄▄▃▃▃█▇▇▇▆▆▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁1277114810169809038898221049122884383684325892231234221781870170924932934035735536136436441639546144044944834538132926227980NANANA90NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▇▅██▆▆█▅▅▅▅▆▆▃▄▅▅▅▃▅▄▄▂▄▁▃▂▄▃▂▂▄582462355191704072315790597070635474544251475158565657434114427351104965497935895245464347553061448624813994331643693615342434224393NANANA3468NANANA2903NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▁▇▇▇▇▇▇▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇▇-3101-3929-3498-4188-3226-42264-3284-3014-2292-3677-2540-3693-3794-4233-8324-3119-2709-4760-2968-2542-1694-2653-2192-2383-1505-2187-2367-2197-2763-19963339-1480-1349NANANA-6887NANANA-1256NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▃▂█▄▂▃▃▃▃▃▃▃▃▃▃▂▃▂▃▃▃▃▃▃▃▁▃▃▃▃374-355-2094-2407-4325260066094-4384-576-2451-1186-2794-1141-10162352-2117932197-3604-1498-3524-2627455-2203-1645-179-1413-1569-1071843335-2048-2457NANANA-743NANANA1165NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▇▅██▆▆█▅▅▅▅▆▆▃▄▅▅▅▃▅▄▄▂▄▁▃▂▄▃▂▂▄582462355191704072315790597070635474544251475158565657434114427351104965497935895245464347553061448624813994331643693615342434224393NANANA3468NANANA2903NANANANA
us-gaap:NetIncomeLoss ▂▂▂▂▂▂▂▂▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁2147316232173125355325112886321631181498526502513256622962237202821341971199621372059192525921992187119131732173414371518211313481224128790810229431018867884866955944967772
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings2147NANANA3553NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▁▂▂▂▂▂▂▂▂█▂▂▂▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▂▁▁2224320032883203363225822896320831761503526832535264724172324208022242056204121752141199626332025193819681778174416451807297816331447NA116613671039NA870886879NANANANA
us-gaap:DepreciationDepletionAndAmortization 3264NANANA3320NANANA2599NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▆▅▅▅▁▄▁█▅▄▅▅▄▆▅▅▅▄▅▃▅▅▇▄▄▃█▃▅▄▅▂334498319160250-1191-168-10651130241-82195238-152453281212220-228255-650297332749-2857-5761237-52730-263195-711NANANA-29NANANA253NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▁▇▇▇▇▇▇▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇▇-3101-3929-3498-4188-3226-42264-3284-3014-2292-3677-2540-3693-3794-4233-8324-3119-2709-4760-2968-2542-1694-2653-2192-2383-1505-2187-2367-2197-2763-19963339-1480-1349NANANA-6887NANANA-1256NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃█▆▅▄█▅▅▄▆▅▅▄▆▅▅▃▆▄▄▃▅▄▃▂▄▃▂▂▃▂▁▁188130872511226320923167238422501973271124342327207825732406227118852637216519711726222419501798144820031726150613611671158212871174NA140812711106NA13661138925NANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:CableCommunications▁▇▅▃▂█▆▄▄▇▆▆▄▇▆▅▃12692138181415941363231819441766168821542061195617812095204418811576NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:SkyLimited▅▇▁▄█197228104177259NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cmcsa:ThemeParks▄█▇▆▇▅▃▆▁▄▁▃▂▃▂▃▂296433400378394332269360182289199243229254228240200NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments cmcsa:NBCUniversalSegments▃█▅▅▄▇▄▅▁▆▃▂▁▅▂▃377641505473453595405461269525354338285461336360NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquireInvestments ▁▂▁█▄▃▃▃▂▂▂▆▇▇▁▂▄▁▄▂▁▁▁▁▁▁▄▄▁▁▁▁▁6920292116643941730231822022823976310621079381324487244024032466840374653655388106834662NANANA16NANANA24NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▃▂█▄▂▃▃▃▃▃▃▃▃▃▃▂▃▂▃▃▃▃▃▃▃▁▃▃▃▃374-355-2094-2407-4325260066094-4384-576-2451-1186-2794-1141-10162352-2117932197-3604-1498-3524-2627455-2203-1645-179-1413-1569-1071843335-2048-2457NANANA-743NANANA1165NANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▃▂▁▁▁█▂▁▂▁▂▂▂▁▂▁▂▁▁▂▁▁▁92814963153141222349315571236404362497546335000447814303323149003996001995NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ████▇▇▇▇▆▅▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁977957955954869865871878738736743747657657663670611614623628572578584584508510512513429432435437304NANANA261NANANA268NANANANA
us-gaap:PaymentsOfDividends ████▇▇▇▇▆▅▆▆▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁977957955954869865871878738736743747657657663670611614623628572578584584508510512513429432435437304NANANA261NANANA268NANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▂▁▁▁▂▄▅▅▆▅▇▆▄▅▅▅▅▄█▆▇▇▃▃▃▂▂▂▂▃▃▃▃2337282103247103812841269172912231736148099612381377113612499802185158520002001750750750500500500500750750750750NANANA525NANANA300NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

Common Stock Value

us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value545454545454545455555556562828282929252525252525252525252525252525252525242424
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value542754165412540854015389541254455480550755375576560628022819283828542869246524802488249625152515251125032501249924942487248424802475246024582455244924372428
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value45544543453945354529451745404572460746354664470347332366238324022417243221002114212221312150214921462138213621332129212221182114210920952092208920842071206320612054
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value99999999999999999999999999999999999999999
Percentage of CommonStockSharesOutstanding0.20.20.20.20.20.20.20.20.20.20.20.20.20.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.50.50.40.4

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4617461946074594461946434705477748094832243124462462250225312556261626282645265826662675270327172744276127892805281028222837
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4562455145474534456445984633469847284747240324202434247225002520258025942603262226312634266826872708273927592772280228162829
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.470.690.710.690.780.550.630.70.673.220.560.530.540.960.930.840.880.80.810.850.820.751.00.770.720.730.660.660.550.570.790.50.450.470.330.370.340.370.310.310.310.330.330.330.27
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.460.680.70.680.770.550.620.690.663.170.550.520.530.950.920.830.870.790.80.840.810.740.990.760.710.720.650.650.540.560.780.50.450.470.330.370.340.360.310.310.310.330.330.330.27
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2660928398268272685826859278462213521735227912191520983211652046321025213191926918790192451866918743178531773216791168441740816926161511627015310159371654415211148781504214339143331212897219489952592029067884589788866
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1201274256108481276255391381266205208203168180199
Percentage of Revenues0.50.40.20.20.41.71.21.21.71.71.31.01.01.00.80.91.1
Percentage of Revenues0.50.40.20.20.41.71.21.21.71.71.31.01.01.00.80.91.1
Percentage of Revenues us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-680-690-648-682-639-643-553-543-648-532-500-493-524-472-584-458
Percentage of Revenues-2.6-2.4-2.4-2.5-2.4-2.3-2.5-2.5-2.8-2.4-2.4-2.3-2.6-2.2-2.7-2.4
Percentage of Revenues-2.6-2.4-2.4-2.5-2.4-2.3-2.5-2.5-2.8-2.4-2.4-2.3-2.6-2.2-2.7-2.4
Percentage of Revenues us-gaap:MaterialReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cmcsa:BusinessServices, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value20431891
Percentage of Revenues7.77.0
Percentage of Revenues7.77.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:BusinessServices cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:Content, cmcsa:SkyLimited



Period End2020-03-312019-03-31
Value325370
Percentage of Revenues1.21.4
Percentage of Revenues1.21.4
Percentage of Revenues us-gaap:OperatingSegments cmcsa:Content cmcsa:SkyLimited100.0100.0

us-gaap:OperatingSegments, cmcsa:ContentLicensing, cmcsa:BroadcastTelevision



Period End2020-03-312019-03-31
Value735560
Percentage of Revenues2.82.1
Percentage of Revenues2.82.1
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ContentLicensing cmcsa:BroadcastTelevision100.0100.0

us-gaap:OperatingSegments, cmcsa:ContentLicensing, cmcsa:FilmedEntertainment



Period End2020-03-312019-03-31
Value691817
Percentage of Revenues2.63.0
Percentage of Revenues2.63.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ContentLicensing cmcsa:FilmedEntertainment100.0100.0

us-gaap:OperatingSegments, cmcsa:ContentLicensingAndOther, cmcsa:CableNetworks



Period End2020-03-312019-03-31
Value317281
Percentage of Revenues1.21.0
Percentage of Revenues1.21.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ContentLicensingAndOther cmcsa:CableNetworks100.0100.0

us-gaap:OperatingSegments, cmcsa:DirectToConsumer, cmcsa:SkyLimited



Period End2020-03-312019-03-31
Value36793834
Percentage of Revenues13.814.3
Percentage of Revenues13.814.3
Percentage of Revenues us-gaap:OperatingSegments cmcsa:DirectToConsumer cmcsa:SkyLimited100.0100.0

us-gaap:OperatingSegments, cmcsa:Distribution, cmcsa:CableNetworks



Period End2020-03-312019-03-31
Value17081735
Percentage of Revenues6.46.5
Percentage of Revenues6.46.5
Percentage of Revenues us-gaap:OperatingSegments cmcsa:Distribution cmcsa:CableNetworks100.0100.0

us-gaap:OperatingSegments, cmcsa:DistributionAndOther, cmcsa:BroadcastTelevision



Period End2020-03-312019-03-31
Value631590
Percentage of Revenues2.42.2
Percentage of Revenues2.42.2
Percentage of Revenues us-gaap:OperatingSegments cmcsa:DistributionAndOther cmcsa:BroadcastTelevision100.0100.0

us-gaap:OperatingSegments, cmcsa:HomeEntertainment, cmcsa:FilmedEntertainment



Period End2020-03-312019-03-31
Value171267
Percentage of Revenues0.61.0
Percentage of Revenues0.61.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:HomeEntertainment cmcsa:FilmedEntertainment100.0100.0

us-gaap:OperatingSegments, cmcsa:Other, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value443413
Percentage of Revenues1.71.5
Percentage of Revenues1.71.5
Percentage of Revenues us-gaap:OperatingSegments cmcsa:Other cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:Other, cmcsa:FilmedEntertainment



Period End2020-03-312019-03-31
Value191239
Percentage of Revenues0.70.9
Percentage of Revenues0.70.9
Percentage of Revenues us-gaap:OperatingSegments cmcsa:Other cmcsa:FilmedEntertainment100.0100.0

us-gaap:OperatingSegments, cmcsa:ResidentialHighSpeedInternet, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value50014577
Percentage of Revenues18.817.0
Percentage of Revenues18.817.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ResidentialHighSpeedInternet cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:ResidentialVideo, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value56325628
Percentage of Revenues21.221.0
Percentage of Revenues21.221.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ResidentialVideo cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:ResidentialVoice, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value899990
Percentage of Revenues3.43.7
Percentage of Revenues3.43.7
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ResidentialVoice cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:ResidentialWireless, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value343225
Percentage of Revenues1.30.8
Percentage of Revenues1.30.8
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ResidentialWireless cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, cmcsa:Theatrical, cmcsa:FilmedEntertainment



Period End2020-03-312019-03-31
Value317445
Percentage of Revenues1.21.7
Percentage of Revenues1.21.7
Percentage of Revenues us-gaap:OperatingSegments cmcsa:Theatrical cmcsa:FilmedEntertainment100.0100.0

us-gaap:OperatingSegments, us-gaap:Advertising, cmcsa:BroadcastTelevision



Period End2020-03-312019-03-31
Value13181317
Percentage of Revenues5.04.9
Percentage of Revenues5.04.9
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Advertising cmcsa:BroadcastTelevision100.0100.0

us-gaap:OperatingSegments, us-gaap:Advertising, cmcsa:CableCommunications



Period End2020-03-312019-03-31
Value557556
Percentage of Revenues2.12.1
Percentage of Revenues2.12.1
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Advertising cmcsa:CableCommunications100.0100.0

us-gaap:OperatingSegments, us-gaap:Advertising, cmcsa:CableNetworks



Period End2020-03-312019-03-31
Value834852
Percentage of Revenues3.13.2
Percentage of Revenues3.13.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Advertising cmcsa:CableNetworks100.0100.0

us-gaap:OperatingSegments, us-gaap:Advertising, cmcsa:SkyLimited



Period End2020-03-312019-03-31
Value513593
Percentage of Revenues1.92.2
Percentage of Revenues1.92.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Advertising cmcsa:SkyLimited100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2323212217191515141315981016
Percentage of Revenues0.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.0
Percentage of Revenues0.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.0
Percentage of Revenues us-gaap:CorporateNonSegment cmcsa:NBCUniversalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-71-83-64-86-83-93-73-80-103-83-71-84-88-88-84-84
Percentage of Revenues-0.3-0.3-0.2-0.3-0.3-0.3-0.3-0.4-0.5-0.4-0.3-0.4-0.4-0.4-0.4-0.4
Percentage of Revenues-0.3-0.3-0.2-0.3-0.3-0.3-0.3-0.4-0.5-0.4-0.3-0.4-0.4-0.4-0.4-0.4
Percentage of Revenues us-gaap:MaterialReconcilingItems cmcsa:NBCUniversalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:BroadcastTelevision



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value26843162223024022467309924522391349729642133224122082848308721282084
Percentage of Revenues10.111.18.38.99.211.111.111.015.313.510.210.610.813.514.511.011.1
Percentage of Revenues10.111.18.38.99.211.111.111.015.313.510.210.610.813.514.511.011.1
Percentage of Revenues us-gaap:OperatingSegments cmcsa:BroadcastTelevision100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1491814768145841445014280141281378713710135181328213203131221291212843125571244412204
Percentage of Revenues56.152.054.453.853.250.762.363.159.360.662.962.063.161.158.964.664.9
Percentage of Revenues56.152.054.453.853.250.762.363.159.360.662.962.063.161.158.964.664.9
Percentage of Revenues us-gaap:OperatingSegments cmcsa:CableCommunications100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:CableNetworks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value28592927277129472868277928842916319426912603269626412503294225662453
Percentage of Revenues10.710.310.311.010.710.013.013.414.012.312.412.712.911.913.813.313.1
Percentage of Revenues10.710.310.311.010.710.013.013.414.012.312.412.712.911.913.813.313.1
Percentage of Revenues us-gaap:OperatingSegments cmcsa:CableNetworks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:FilmedEntertainment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value13701562170614571768197618191710164717381784215519811834179213511383
Percentage of Revenues5.15.56.45.46.67.18.27.97.27.98.510.29.78.78.47.07.4
Percentage of Revenues5.15.56.45.46.67.18.27.97.27.98.510.29.78.78.47.07.4
Percentage of Revenues us-gaap:OperatingSegments cmcsa:FilmedEntertainment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:NBCUniversalSegments



Period End2020-03-312019-03-31
Value77348313
Percentage of Revenues29.131.0
Percentage of Revenues29.131.0
Percentage of Revenues us-gaap:OperatingSegments cmcsa:NBCUniversalSegments100.0100.0

us-gaap:OperatingSegments, cmcsa:SkyLimited



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value45175040455448284797
Percentage of Revenues17.017.717.018.017.9
Percentage of Revenues17.017.717.018.017.9
Percentage of Revenues us-gaap:OperatingSegments cmcsa:SkyLimited100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cmcsa:ThemeParks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8691562163114641276151315281361128114611550131411181344144011361026
Percentage of Revenues3.35.56.15.54.85.46.96.35.66.77.46.25.56.46.85.95.5
Percentage of Revenues3.35.56.15.54.85.46.96.35.66.77.46.25.56.46.85.95.5
Percentage of Revenues us-gaap:OperatingSegments cmcsa:ThemeParks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7734915382958206831392938625831395308784801483317853845191787103
Percentage of Revenues29.132.230.930.631.033.439.038.241.840.138.239.438.440.243.136.9
Percentage of Revenues29.132.230.930.631.033.439.038.241.840.138.239.438.440.243.136.9
Percentage of Revenues cmcsa:NBCUniversalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

cmcsa:OtherGeographicLocations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value88611651218102210321297106611051085
Percentage of Revenues3.34.14.53.83.84.74.85.14.8
Percentage of Revenues3.34.14.53.83.84.74.85.14.8
Percentage of Revenues cmcsa:OtherGeographicLocations100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value20690215582039820539204572117320244199312088520199191421907318832
Percentage of Revenues77.875.976.076.576.276.091.591.791.692.291.290.192.0
Percentage of Revenues77.875.976.076.576.276.091.591.791.692.291.290.192.0
Percentage of Revenues country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Europe



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value503356755211529753705376825699821
Percentage of Revenues18.920.019.419.720.019.33.73.23.6
Percentage of Revenues18.920.019.419.720.019.33.73.23.6
Percentage of Revenues srt:Europe100.0100.0100.0100.0100.0100.0100.0100.0100.0

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value21757231512148721502216772333217299167211814617808161911660715933167611687915203147011524314668146381396313945130461304013840132791273712835122431264313496121321212011698113959904753574477267
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues81.881.580.180.180.783.878.276.979.681.377.278.577.979.779.278.978.279.278.678.178.278.677.777.479.578.578.978.980.079.381.679.881.581.679.581.779.478.279.0

Selling General And Administrative Expense

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value485252475340535651824514483650144645410747924558453042644440406640894002400141053890378737453804356836473414343530673294304830792758291826412938222420131954207819351817171118751811
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues18.218.519.919.919.316.221.823.120.418.722.821.522.120.320.821.121.820.821.421.921.821.422.322.620.521.521.121.120.020.718.420.218.519.418.420.518.320.720.621.821.020.019.320.920.4

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value121211131167113711501129830806777807766758755756751732703674659713656664663648642646639636653623633625640637621605545543524
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.63.94.44.24.34.13.73.73.43.73.73.63.73.63.53.83.73.53.53.83.73.73.93.83.73.84.03.94.33.93.84.14.34.44.35.05.75.75.7

Other Nonoperating Income Expense

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-21572278-1144-566807-797-103-173157-1920-11157-43045249238-51-2527-40-34-16102-68-14-17-1017-92
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-8.18.0-4.3-2.13.0-2.9-0.5-0.80.7-0.10.1-0.10.8-2.00.21.31.3-0.3-0.10.1-0.2-0.2-0.10.10.0-0.00.0-0.1-0.1-0.10.1-0.10.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value29244061406341644708306838954285399434224096389939053736372433583535321832643488340231103040325930562954279927922570258543832444219718052381163514541474
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues11.014.315.115.517.511.017.619.717.515.619.518.419.117.817.517.418.816.717.518.619.117.518.119.317.617.517.317.216.816.226.516.114.812.616.613.515.315.5

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-716-73-110-55676-317-11177126-685-696-659-625-528-716-708-554-784-737-617-488-677-705-545-512-693-615-643-497-7091335-635-561-836-557-589-500-604-465
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.7-0.3-0.4-0.22.5-1.1-0.50.40.6-3.1-3.3-3.1-3.1-2.5-3.4-3.7-2.9-4.1-3.9-3.3-2.7-3.8-4.2-3.2-2.9-4.1-3.8-4.0-3.2-4.48.1-4.2-3.8-5.8-3.9-4.9-5.3-6.3-5.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value70086177596110764869991077818-11613141313641258131914001278131111621223131312611114407123411189861021104892577814058117506391014596584588591
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.63.02.93.64.01.74.55.03.6-53.06.76.46.16.36.66.67.06.06.67.07.16.32.47.36.45.86.36.46.04.98.55.35.04.57.14.96.26.26.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value28174185614451898229104611626421206207713297710311495190581114618811187909741718186766958176146198683390411859649674668108046
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.12.63.25.40.73.04.12.10.72.95.79.80.64.64.87.81.03.06.110.00.74.55.810.21.14.55.910.83.06.25.05.90.84.23.50.67.011.30.5

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2224320032883203363225822896320831761503526832535264724172324208022242056204121752141199626332025193819681778174416451807297816331447116613671039870886879
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.411.312.311.913.59.313.114.813.968.612.812.012.911.510.910.811.810.710.911.612.011.315.712.011.111.611.010.710.711.318.010.79.78.19.58.69.29.39.6

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-445368212026414343176927993069327114983260324052810236022702113222419921967215920171776260919451848207915451822143715812235132612288661014945837845865
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.218.97.99.816.26.412.614.114.468.412.411.413.711.210.611.011.810.410.511.511.310.015.511.510.612.39.611.29.49.913.58.78.36.07.17.88.88.99.4

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value8541821682707443218442789303233331502726412422297822342391231524512048201221972099184726501978191521341591183216361868311616031451111813571043840847878
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.019.18.110.116.56.612.613.914.668.612.611.414.610.611.212.013.010.610.811.711.810.415.811.711.012.69.911.310.711.718.810.59.87.89.58.68.98.99.5

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2147316232173125355325112886321631181498526502513256622962237202821341971199621372059192525921992187119131732173414371518211313481224128790810229431018867884866955944967772
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.111.112.011.613.29.013.014.813.768.412.611.912.510.910.510.511.410.210.711.411.510.915.411.810.711.310.710.79.49.512.88.98.28.66.37.17.810.59.19.39.410.510.710.88.7

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-03-31
Value21473553
Percentage of NetIncomeLoss100.0100.0
Percentage of Revenues8.113.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NoncontrollingInterest



Period End2020-03-312019-03-31
Value1051
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0
Percentage of Revenues0.00.2
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value262421263414256374256555256189251684200635191248190876186949185301183031182479180500177924171985170599166574158958159674158757159339159237157459157773158813156595156819156364164971162454157688157949157818156827154782154259118534112733
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:Ownership

us-gaap:VariableInterestEntityPrimaryBeneficiary, cmcsa:UniversalBeijingResort



Period End2020-03-31
Value3400
Percentage of Assets1.3
Percentage of Assets1.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary cmcsa:UniversalBeijingResort100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value262421263414256374256555256189251684200635191248190876186949185301183031182479180500177924171985170599166574158958159674158757159339159237157459157773158813156595156819156364164971162454157688157949157818156827154782154259118534112733
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value815068272678144768507495971613715237069469482686065542755005550595394353481530985264252269517165240052171527115329851971512685069449718490914819049356488924773147476472744668346643463284435442721
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.131.430.530.029.328.535.637.036.436.729.930.130.229.930.130.930.931.432.532.832.933.133.533.032.531.931.731.330.829.930.130.330.130.029.830.130.037.437.9

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value24084253922232321361202732184823206182151875316060159601483215245163611522814777151801230311501133191292113531139361277214043140751340712735117831999118066113549355857385828350754788863223
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.29.68.78.37.98.711.69.59.88.68.68.18.49.18.68.68.97.47.28.38.18.58.88.18.98.98.68.17.512.111.17.25.95.45.55.44.97.52.9

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value85165500350739193498381410616572660303428411426934022330128074665562822951893348639373910454715293054171816031389183910951889921012207162018061997182259844542402834836711195963
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.22.11.41.51.41.55.33.03.21.82.21.52.21.81.62.73.31.41.22.22.52.52.91.01.91.11.00.91.26.65.51.31.41.01.21.31.25.00.00.00.00.60.00.0

Short Term Investments

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value170317091710171886948782151913331197549375106137144158602531232523893573413237652841146414012231228544664748150
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.70.70.00.00.00.00.00.00.00.00.00.10.00.10.00.10.10.10.10.40.31.51.52.22.62.41.80.90.91.40.10.00.00.00.00.10.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value108001129210684108351073611104898388478759854679157849752579557533670863756896652770166144632161726232615163765501550750635521512343874379435140964156370818551711
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.14.34.24.24.24.44.54.64.64.64.34.34.14.44.23.93.74.14.14.43.94.03.94.03.94.03.53.53.23.33.22.82.82.82.62.72.41.61.5

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4768472346754660309731842384242326102464215226572219208335191969178717931814182617371859169417811586148012121215113911461606152117581615162512421167792551
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.81.81.21.31.21.31.41.31.21.51.21.22.01.11.01.11.11.11.11.21.11.11.00.90.80.80.70.71.01.01.11.01.00.80.80.70.5

Land

Machinery And Equipment Gross

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value535665323952983524675193251306509345073150393499164994349951499914969449540491194861148100474604673846037454104482144186433814257441816410894027739425386883798037275365283551534505335033250527810
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.420.220.720.520.320.425.426.526.426.727.027.327.427.527.828.628.528.929.929.329.028.528.128.127.526.826.726.225.823.923.824.123.623.122.622.321.727.424.7

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value484424832246790460474572144437398553935539068384703785637171366263625335656348963412233665321703157231127309533036229970295882984028806282552821927232269842689126962275592744124619249112351523855
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.518.318.317.917.817.719.920.620.520.620.420.320.120.120.020.320.020.220.219.819.619.419.119.018.818.818.418.018.016.516.617.117.117.517.515.916.119.821.2

Long Term Investments

us-gaap:LongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value646869897473843891597883772474387095693166956521593852473857367936383224332329993235313531293072309037703672529954336325595180181014998549575108291071166705947
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.72.93.33.63.13.83.93.73.73.63.63.32.92.22.12.11.92.11.92.02.02.02.02.02.42.33.43.53.83.75.16.46.26.17.06.95.65.3

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value67218687256691367945680736615436703368723714736780367523674236592359803665233792334583294527492274222730227316273232732327103270982707927075269962698527088270102680326874268312691927001149581493314889
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.626.126.126.526.626.318.319.319.519.719.820.120.119.920.619.619.619.817.317.217.217.117.217.417.217.117.317.317.316.416.717.117.017.017.117.417.512.613.20.0

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value917588668883877086455802775637443707348931452899273227692658246222372272250024452319233324742517238223432345231123322180218421452203219022012126197714611218
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.43.53.43.42.33.92.01.91.91.71.61.51.51.51.41.31.41.61.51.51.51.61.61.51.51.51.51.51.31.31.41.41.41.41.41.31.21.1

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2760030292259893100827917276031962719007191792156121449222761907421535180381760119084181781735917565185021741017084173751780318912186661860218018167141733515742156321324114146126971374782347249
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.511.510.112.110.911.09.89.910.011.511.612.210.511.910.110.211.210.910.911.011.710.910.711.011.311.911.911.911.510.110.710.09.98.49.08.28.96.96.4

Debt Current

us-gaap:DebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value297344521039636546294398317326343039513452416358350954803333293441193627315238874180421735232947281932802337253521772376279929542705136724481350229618001156
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.70.42.51.81.71.61.41.62.72.83.51.93.01.91.72.42.22.02.42.62.62.21.91.82.11.51.61.41.41.71.91.70.91.60.91.51.51.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9963108261019810014102328494703669407349692669766730665869156594635963336215599658806157563856805432553455286032607757506206625057305763570554554838485832913094
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.14.03.94.03.43.53.63.93.73.83.73.63.83.73.73.73.73.83.73.93.53.63.43.53.53.93.93.73.83.83.63.63.63.53.13.12.82.7

Deferred Tax Liabilities Noncurrent

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value127711481016980903889822104912288438368432589223123422178187017092493293403573553613643644163954614404494483453813292622798090
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.40.40.40.40.40.50.60.50.50.51.41.21.31.31.11.00.20.20.20.20.20.20.20.20.30.30.30.30.30.30.20.20.20.20.20.10.1

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1714416765168531714418811153291246812069112531090410914108371067710925111191071910431106371069410438108371081910388112411110911384114931246112640132711286013432134461303411657119851161778626767
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.56.46.66.77.36.16.26.35.95.85.95.95.96.16.26.26.16.46.76.56.86.86.57.17.07.27.37.98.18.07.98.58.58.37.47.77.56.66.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value815068272678144768507495971613715237069469482686065542755005550595394353481530985264252269517165240052171527115329851971512685069449718490914819049356488924773147476472744668346643463284435442721
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.131.430.530.029.328.535.637.036.436.729.930.130.229.930.130.930.931.432.532.832.933.133.533.032.531.931.731.330.829.930.130.330.130.029.830.130.037.437.9

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value8278383874791607783075862725027234571743707106944956263558485764856174558235527654512539785196552729525115306853653523325163251058501344948648651497964934148179478214765547012469054660744434438684352443179428114057641489
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.531.830.930.329.628.836.137.537.037.130.430.531.631.131.432.132.032.432.733.033.133.333.733.232.732.132.031.631.130.230.430.630.330.230.030.330.237.50.00.00.038.00.00.0

us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value5454545454545454555555565628565757292525
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.10.10.10.10.10.10.10.10.10.10.00.10.10.10.10.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value-11441047-1159-62422-36837446160837938142834298341-84-174-195-166-188-1463-143356-11077-1115-48-170-148-152-147-105-97-99-116-86-47-46-113-56
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-1.41.2-1.5-0.10.6-0.50.50.60.90.50.70.80.60.20.10.0-0.2-0.3-0.4-0.3-0.4-0.30.0-0.00.10.1-0.20.2-0.00.0-0.1-0.4-0.3-0.3-0.3-0.2-0.2-0.2-0.3-0.2-0.1-0.1-0.3-0.1
Percentage of Assets-0.40.4-0.5-0.00.2-0.10.20.20.30.20.20.20.20.10.00.0-0.0-0.1-0.1-0.1-0.1-0.10.0-0.00.00.0-0.10.0-0.00.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value3859738447381963795037621374613739437427373753749737529374783811538258384263846938464385183851638741386603880538977390403898538890389913899138957405474065240761408934094041079413014140739780398603998240097402474062041688
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest46.645.848.348.849.651.751.752.252.954.066.767.166.168.168.869.670.671.474.173.573.673.172.674.675.576.277.878.880.181.482.484.685.585.987.488.188.889.590.991.992.994.0100.1100.5
Percentage of Assets14.714.614.914.814.714.918.619.619.620.120.320.520.921.221.622.422.523.124.224.324.424.424.524.824.724.524.924.924.924.625.025.825.925.926.226.726.833.60.00.00.035.70.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value127711481016980903889822104912288438368432589223123422178187017092493293403573553613643644163954614404494483453813292622798084879790126149
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest1.51.41.31.31.21.21.11.51.71.21.51.54.54.04.23.93.43.20.50.60.60.70.70.70.70.70.80.80.90.90.90.90.70.80.70.60.60.20.20.20.20.20.30.4
Percentage of Assets0.50.40.40.40.40.40.40.50.60.50.50.51.41.21.31.31.11.00.20.20.20.20.20.20.20.20.30.30.30.30.30.30.20.20.20.20.20.10.00.00.00.10.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value51516506954857046425443794198341218402693896138192249792456024063230762251022117217502141320883213132118621539218052043219737192351832417509167301628015774146261421713971132361293212504121581152511026105171000574277191
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest62.260.461.459.658.557.957.056.155.155.044.444.041.741.140.340.039.939.740.240.440.340.640.639.038.237.736.635.434.432.732.030.429.729.328.227.626.827.426.325.324.423.418.317.3
Percentage of Assets19.619.218.918.117.316.720.521.120.420.413.513.413.212.812.712.912.712.913.113.313.313.513.713.012.512.111.711.210.79.99.79.39.08.98.48.48.110.30.00.00.08.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value545454545454545455555556562828282929252525252525252525252525252525252525242424
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value385973844738196379503762137461373943742737375374973752937478381153825838426384693846438518385163874138660388053897739040389853889038991389913895740547406524076140893409404107941301414073978040247
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.714.614.914.814.714.918.619.619.620.120.320.520.921.221.622.422.523.124.224.324.424.424.524.824.724.524.924.924.924.625.025.825.925.926.226.726.833.635.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value515165069548570464254437941983412184026938961381922497924560240632307622510221172175021413208832131321186215392180520432197371923518324175091673016280157741462614217139711323612932125041215810005
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.619.218.918.117.316.720.521.120.420.413.513.413.212.812.712.912.712.913.113.313.313.513.713.012.512.111.711.210.79.99.79.39.08.98.48.48.110.38.9

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value-11441047-1159-62422-36837446160837938142834298341-84-174-195-166-188-1463-143356-11077-1115-48-170-148-152-147-105-97-99-116-86-47-46
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.40.4-0.5-0.00.2-0.10.20.20.30.20.20.20.20.10.00.0-0.0-0.1-0.1-0.1-0.1-0.10.0-0.00.00.0-0.10.0-0.00.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.0-0.0

Treasury Stock Value

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value127711481016980903889822104912288438368432589223123422178187017092493293403573553613643644163954614404494483453813292622798090
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.40.40.40.40.40.50.60.50.50.51.41.21.31.31.11.00.20.20.20.20.20.20.20.20.30.30.30.30.30.30.20.20.20.20.20.10.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value58246235519170407231579059707063547454425147515856565743411442735110496549793589524546434755306144862481399433164369361534243422439334682903
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues21.922.019.326.226.920.827.032.524.024.824.524.427.627.319.322.227.225.826.719.129.426.228.318.225.814.724.720.428.522.720.722.529.528.631.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value-3101-3929-3498-4188-3226-42264-3284-3014-2292-3677-2540-3693-3794-4233-8324-3119-2709-4760-2968-2542-1694-2653-2192-2383-1505-2187-2367-2197-2763-19963339-1480-1349-6887-1256
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.7-13.8-13.0-15.6-12.0-151.8-14.8-13.9-10.1-16.8-12.1-17.4-18.5-20.1-39.0-16.2-14.4-24.7-15.9-13.6-9.5-15.0-13.1-14.1-8.6-12.9-14.7-13.5-18.0-12.520.2-9.7-9.1-56.8-13.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value374-355-2094-2407-4325260066094-4384-576-2451-1186-2794-1141-10162352-2117932197-3604-1498-3524-2627455-2203-1645-179-1413-1569-1071843335-2048-2457-7431165
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.4-1.3-7.8-9.0-16.193.427.5-20.2-2.5-11.2-5.7-13.2-5.6-4.811.0-11.05.01.0-19.3-8.0-19.7-14.82.7-13.1-9.4-1.1-8.7-9.6-70.02.70.2-13.5-16.5-6.112.7

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value58246235519170407231579059707063547454425147515856565743411442735110496549793589524546434755306144862481399433164369361534243422439334682903
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues21.922.019.326.226.920.827.032.524.024.824.524.427.627.319.322.227.225.826.719.129.426.228.318.225.814.724.720.428.522.720.722.529.528.631.5

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value2147316232173125355325112886321631181498526502513256622962237202821341971199621372059192525921992187119131732173414371518211313481224128790810229431018867884866955944967772
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.111.112.011.613.29.013.014.813.768.412.611.912.510.910.510.511.410.210.711.411.510.915.411.810.711.310.710.79.49.512.88.98.28.66.37.17.810.59.19.39.410.510.710.88.7

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-03-31
Value21473553
Percentage of NetIncomeLoss100.0100.0
Percentage of Revenues8.113.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2224320032883203363225822896320831761503526832535264724172324208022242056204121752141199626332025193819681778174416451807297816331447116613671039870886879
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.411.312.311.913.59.313.114.813.968.612.812.012.911.510.910.811.810.710.911.612.011.315.712.011.111.611.010.710.711.318.010.79.78.19.58.69.29.39.6

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-03-312018-03-31
Value326433202599
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value334498319160250-1191-168-10651130241-82195238-152453281212220-228255-650297332749-2857-5761237-52730-263195-711-29253
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value-3101-3929-3498-4188-3226-42264-3284-3014-2292-3677-2540-3693-3794-4233-8324-3119-2709-4760-2968-2542-1694-2653-2192-2383-1505-2187-2367-2197-2763-19963339-1480-1349-6887-1256
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.7-13.8-13.0-15.6-12.0-151.8-14.8-13.9-10.1-16.8-12.1-17.4-18.5-20.1-39.0-16.2-14.4-24.7-15.9-13.6-9.5-15.0-13.1-14.1-8.6-12.9-14.7-13.5-18.0-12.520.2-9.7-9.1-56.8-13.6

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value18813087251122632092316723842250197327112434232720782573240622711885263721651971172622241950179814482003172615061361167115821287117414081271110613661138925
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3880881917323523163219331217263014
Percentage of PaymentsToAcquirePropertyPlantAndEquipment2.02.63.50.80.81.01.51.00.81.20.81.40.60.71.11.30.7

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value47105554836127795347152663815956778
Percentage of PaymentsToAcquirePropertyPlantAndEquipment2.53.42.22.11.74.03.32.42.45.62.71.60.73.72.83.4

us-gaap:OperatingSegments, cmcsa:BroadcastTelevision



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value25753637131053732305566302976283019
Percentage of PaymentsToAcquirePropertyPlantAndEquipment1.32.41.41.60.63.31.61.41.52.02.71.31.43.01.21.31.0

us-gaap:OperatingSegments, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value12692138181415941363231819441766168821542061195617812095204418811576
Percentage of PaymentsToAcquirePropertyPlantAndEquipment67.569.372.270.465.273.281.578.585.679.584.784.185.781.485.082.883.6

us-gaap:OperatingSegments, cmcsa:CableNetworks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5209662011831858217771
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.30.60.40.30.30.60.50.40.20.70.20.30.10.70.30.30.1

us-gaap:OperatingSegments, cmcsa:FilmedEntertainment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value48544119871118191019653
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.20.30.20.20.20.30.40.40.40.40.70.80.50.70.20.20.2

us-gaap:OperatingSegments, cmcsa:SkyLimited



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value197228104177259
Percentage of PaymentsToAcquirePropertyPlantAndEquipment10.57.44.17.812.4

us-gaap:OperatingSegments, cmcsa:ThemeParks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value296433400378394332269360182289199243229254228240200
Percentage of PaymentsToAcquirePropertyPlantAndEquipment15.714.015.916.718.810.511.316.09.210.78.210.411.09.99.510.610.6

us-gaap:StatementBusinessSegments

cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value377641505473453595405461269525354338285461336360
Percentage of PaymentsToAcquirePropertyPlantAndEquipment20.020.820.120.921.718.817.020.513.619.414.514.513.717.914.015.9

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value69202921166439417302318220228239763106210793813244872440240324668403746536553881068346621624
Percentage of PaymentsToAcquireInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value374-355-2094-2407-4325260066094-4384-576-2451-1186-2794-1141-10162352-2117932197-3604-1498-3524-2627455-2203-1645-179-1413-1569-1071843335-2048-2457-7431165
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.4-1.3-7.8-9.0-16.193.427.5-20.2-2.5-11.2-5.7-13.2-5.6-4.811.0-11.05.01.0-19.3-8.0-19.7-14.82.7-13.1-9.4-1.1-8.7-9.6-70.02.70.2-13.5-16.5-6.112.7

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value92814963153141222349315571236404362497546335000447814303323149003996001995
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.00.0100.0

Repayments Of Long Term Debt

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value977957955954869865871878738736743747657657663670611614623628572578584584508510512513429432435437304261268
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value977957955954869865871878738736743747657657663670611614623628572578584584508510512513429432435437304261268
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value2337282103247103812841269172912231736148099612381377113612499802185158520002001750750750500500500500750750750750525300
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

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

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

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value298231257288245219197211199157203218173145164178153137136159135127120147119107991111029389100898482
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value8609558936024019359739091462258426177357142282822414634152423
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-31
Value00-487487-1288-25302886925-902902-1112198-18931180405743-538355-8313-150-67-9421-36495047-14349111-1-147-4071677
Percentage of ProceedsFromRepaymentsOfShortTermDebt0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:AdjustedEBITDA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value81308436855387168553819173137417724467517180709970326760683564556367
Percentage of AdjustedEBITDA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-252-243-237-213-187-378-378-392-397-549-349-302-194-206-223-291-154
Percentage of AdjustedEBITDA-3.1-2.9-2.8-2.4-2.2-4.6-5.2-5.3-5.5-8.1-4.9-4.3-2.8-3.0-3.3-4.5-2.4

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value811-1-2112111011-59119101110-749
Percentage of AdjustedEBITDA0.10.1-0.0-0.20.10.10.10.1-0.80.20.10.10.20.1-1.10.1

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-187-203-130-182-174-183-161-148-188-199-122-235-185-181-183-175
Percentage of AdjustedEBITDA-2.3-2.4-1.5-2.1-2.0-2.2-2.2-2.0-2.6-2.9-1.7-3.3-2.6-2.7-2.7-2.7

us-gaap:MaterialReconcilingItems, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3-12-207-1-20-31-1-110-11
Percentage of AdjustedEBITDA0.0-0.00.0-0.00.00.1-0.0-0.00.0-0.00.0-0.0-0.00.1-0.00.0

us-gaap:OperatingSegments, cmcsa:BroadcastTelevision



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value501471338534387412321417507194321416322264378394284
Percentage of AdjustedEBITDA6.25.64.06.14.55.04.45.67.02.94.55.94.63.95.56.14.5

us-gaap:OperatingSegments, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value60765883580158545728577956155638541554065246532051985186498650484889
Percentage of AdjustedEBITDA74.769.767.867.267.070.676.876.074.880.173.174.973.976.772.978.276.8

us-gaap:OperatingSegments, cmcsa:CableNetworks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1248102695512011262100696811861268100090510551116916893944956
Percentage of AdjustedEBITDA15.412.211.213.814.812.313.216.017.514.812.614.915.913.613.114.615.0

us-gaap:OperatingSegments, cmcsa:FilmedEntertainment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1069119518336417921413820323039428536812135356167
Percentage of AdjustedEBITDA1.31.12.32.14.32.22.91.92.83.45.54.05.21.85.20.92.6

us-gaap:OperatingSegments, cmcsa:SkyLimited



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value551765899772663
Percentage of AdjustedEBITDA6.89.110.58.97.8

us-gaap:OperatingSegments, cmcsa:ThemeParks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value76636731590498666725569495661775551397640706469375
Percentage of AdjustedEBITDA0.97.58.56.85.88.19.97.76.89.810.87.85.69.510.37.35.9

us-gaap:StatementBusinessSegments

cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1747202020912324233720872066216022851883227420712019177021461689
Percentage of AdjustedEBITDA21.523.924.426.727.325.528.329.131.527.931.729.228.726.231.426.2

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

cmcsa:CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue

cmcsa:FranchiseAndOtherRegulatoryFees, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0260.00.0260.0250.0260.00.0260.0270.0280.00.0280.0280.029
Percentage of CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

cmcsa:CapitalContributionToVIE

cmcsa:Atairos



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1296124263714921813100537457
Percentage of CapitalContributionToVIE100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

cmcsa:ChangeInCurrentAndNoncurrentReceivablesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-198417-65154-449577165145-85916-10447-465467487390-562386-385826-119122-29135-195866-87407-465-42849-4460
Percentage of ChangeInCurrentAndNoncurrentReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cmcsa:ContributionsFromAndDistributionsToNoncontrollingInterests

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value1201105062-4617-40-33350-27-32-15-34-35-31-32-36-32-41-39-34-31-27-37-37-33-19-53-31-50-34-46-39-31-4
Percentage of ContributionsFromAndDistributionsToNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cmcsa:ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity

cmcsa:RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-27-13-12-17-20-14-11-14-17-8-4-19-84-216-5
Percentage of ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value7676807085686961795461657259694877546452625053516651486749194264
Percentage of DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:GainLossOnInvestmentsAndOtherNoncashIncomeLossNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-791-146-201-131498-458-186-67461204073
Percentage of GainLossOnInvestmentsAndOtherNoncashIncomeLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:Increasedecreaseinfilmandtelevisioncostnet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-36081291-411-5594594-11345126348-231-46-984229180234241-21438
Percentage of Increasedecreaseinfilmandtelevisioncostnet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value77387178797110-858503322811218752908545388271413367554610208289865
Percentage of NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:NoncashInterestExpenseIncomeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value22710714291777511896758565645858595855585244514845454245413942
Percentage of NoncashInterestExpenseIncomeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:OtherIncomeLossNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value106371-47200128348147441028699
Percentage of OtherIncomeLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:OtherOperatingAndAdministrative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value825487318090808679008771644463656514670364236060582761295994576155255586539452805079516750194924475247974751457044664667458043654244
Percentage of OtherOperatingAndAdministrative100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:PaymentsForConstructionOfThemePark



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value37138028623022020314174422418
Percentage of PaymentsForConstructionOfThemePark100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:ProceedsFromSalesOfBusinessesAndInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1767858113371414328130636513050281101325215180441411813004285641774730312935
Percentage of ProceedsFromSalesOfBusinessesAndInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:ProgrammingAndProductionCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value830193008316825585699252671163007429689260776341607465377003549254315836558256695463535847724874590852524787496846634912572645544737434443273275200222522114
Percentage of ProgrammingAndProductionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:TransactionRelatedCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302011-06-30
Value1412338451355000146
Percentage of TransactionRelatedCosts100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value212179193237174173144163127114152174114188160194228
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllocatedShareBasedCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value22418920824518318115116813912215918112411613114511511211312910110498122908782897676748269697565606067
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:EmployeeStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value12786987512787106688566855
Percentage of AllocatedShareBasedCompensationExpense5.43.73.82.44.94.44.63.08.65.75.03.98.15.24.65.57.04.55.34.77.94.85.1

us-gaap:EmployeeStockOption



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value7155577247505061445052634040484837394043353938
Percentage of AllocatedShareBasedCompensationExpense31.729.127.429.425.727.633.136.331.741.032.734.832.334.536.633.132.234.835.433.334.737.538.8

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value14112714316712712394102836599111747077897068678058
Percentage of AllocatedShareBasedCompensationExpense62.967.268.868.269.468.062.360.759.753.362.361.359.760.358.861.460.960.759.362.057.4

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value11571075105610791080986580582588606589571587550530521493494486487432460420401401413396407401427411409401393385356247248251
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value30201987-417422-312-107138780-3352606-6571406-1324731
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-10-312010-09-302010-07-312010-05-312010-06-302010-02-282010-03-312009-12-312009-12-312009-08-312009-09-302009-05-312009-06-302009-02-282009-03-31
Value0.230.210.210.210.210.190.190.190.190.15750.15750.15750.15750.2750.2750.2750.2750.250.250.250.250.2250.2250.2250.2250.1950.1950.1950.1950.16250.16250.16250.16250.11250.11250.11250.11250.09450.09450.09450.09450.09450.09450.09450.09450.09450.09450.06750.06750.06750.06750.06750.0675
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-31
Value-120952195271-58763425389-11333208735-265459367401217891-44230-119807380204-22668-139460-373-182280100-59130
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value210721022124219722402211203820212011203819911970191519461865186817851776169716741634163015391599156915851520158315661556154915161529154014781486137714111379
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value326431773180327633203197261826032599274625462541250224962395238922782270218321612066209019592000197019981916199019671983196019251930193318631842162416591630
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value35303240293433336252420142021
Percentage of DepreciationAndAmortization1.10.91.01.20.91.11.30.11.40.90.90.80.60.80.9

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-30
Value11612111411411310510610410410497969891
Percentage of DepreciationAndAmortization3.63.83.63.53.43.34.04.04.03.83.83.83.93.8

us-gaap:OperatingSegments, cmcsa:BroadcastTelevision



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value434236403940324034373331323032
Percentage of DepreciationAndAmortization1.31.31.11.21.21.31.21.51.31.31.31.21.31.31.4

us-gaap:OperatingSegments, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value194619561967203620352093207120472053221520152001198019041843
Percentage of DepreciationAndAmortization59.661.661.962.161.365.579.178.679.080.779.178.779.179.780.9

us-gaap:OperatingSegments, cmcsa:CableNetworks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value195186184183182190180179189181179181214187190
Percentage of DepreciationAndAmortization6.05.95.85.65.55.96.96.97.36.67.07.18.67.88.3

us-gaap:OperatingSegments, cmcsa:FilmedEntertainment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value22192120192826632830322621128
Percentage of DepreciationAndAmortization0.70.60.70.60.60.91.02.41.11.11.31.00.80.50.4

us-gaap:OperatingSegments, cmcsa:SkyLimited



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value718641644673741
Percentage of DepreciationAndAmortization22.020.220.320.522.3

us-gaap:OperatingSegments, cmcsa:ThemeParks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value18918218217016216817016715515416618614214598
Percentage of DepreciationAndAmortization5.85.75.75.24.95.36.56.46.05.66.57.35.76.14.3

us-gaap:StatementBusinessSegments

cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-30
Value565550537527515531514553510506507520508465
Percentage of DepreciationAndAmortization17.317.316.916.115.516.619.621.219.618.419.920.520.319.5

us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStockCash

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value1064967965964964868871876884736741747751657662667670612617624630572580583585509511512514430432435439312267
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-7736-16-238-245000
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:EquitySecuritiesFvNiGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-5874174194214-137-38-4028-177-2
Percentage of EquitySecuritiesFvNiGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

cmcsa:Peloton



Period End2020-03-312019-09-30
Value-19150
Percentage of EquitySecuritiesFvNiGainLoss32.886.2

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-668-210-355-202262-308-7669-4995-391536-40-34-19-11-1231-236331033223210-130231116911293-4037-37-40-26-32
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

cmcsa:Atairos



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-581-70-262-106374-193381513517574257-2-9-12-15
Percentage of IncomeLossFromEquityMethodInvestments87.033.373.852.5142.762.7-50.0218.8-71.4184.2-17.9280.0158.35.026.563.2136.4

cmcsa:Hulu



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-82-122-101-109-141824-132-107-131-108-62-52-54
Percentage of IncomeLossFromEquityMethodInvestments12.358.128.554.0-53.8-267.5173.7-155.1267.3-113.7159.0-346.7-150.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value-727802-334-241-574-30934-31920019812746-190328150-1161221560-26337234287-25082-559-21194-281-58428-173169-131-71
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5506860600554572-379818512826280303136036344213635412353036223033868
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value991108710561141970657886500854543905477895522808512723529673550691569656541623587636515617589567544614612540657661354615
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketingAndAdvertisingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value19381943190118851888211216671653160415691553166515301599148715611467155115091528135513301296124212101232128313071147109412231287120311021107984636594545
Percentage of MarketingAndAdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

cmcsa:RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value672760412821-417242111122930171630
Percentage of NetIncomeLossAttributableToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value54-12782123-5976-15-4029
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-10-2035-2-911-5-129
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value106-1045245-5849-17-4620
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17-17117-119-5-146
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value7-328061213-25-4447-78-2-41-10865858-11-1515232010-6-13-59
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-31
Value-21912206-1097-484790-742-87-147153-2-47-1082446433859021-2922-42-14917-47-23166-18763122-224
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-1411-22-12104-20-294-65-587-24734150137-3-165-15
Percentage of OtherComprehensiveIncomeLossNetOfTax0.60.52.02.51.3-0.523.019.72.6300.0-10.64.635.7-385.9103.0176.5152.2-14.355.222.735.7

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-2512-23-12104-20-294-65-587-24734150137-3-165-1500000-216-806-22
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value836897-318881066-63-21100-2-60-140013801-121-57-2-137-1132
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-12-312012-09-302012-06-30
Value38323-9232634-37-12300-2-35-8008200-72-34-124-31
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-03-31
Value1-121112-1-10-59-87104-2-1120100-104304919972086750000511
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0000001001-3552-610001100000-2-17-28-11-59-12-51-4400100-3
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax0.00.00.00.00.00.0100.00.00.0100.0100.0100.0100.00.00.00.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value-15-54-1225-99-2141-193-38765-580-113-57-50-127212-5648-86-1-18144-3256103-2-1723-89-622-54-36219
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value194189676648381310-1891033118221625377810224150010717900715720-595005658172
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:PaymentsToAcquireEquityMethodInvestments

cmcsa:Hulu



Period End2020-03-312019-12-312019-09-302019-05-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00047767023311311411311410299
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value618789608531547560445511419507404420416523426359378454316327273387258260217315250262182318191230184123117
Percentage of PaymentsToAcquireIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2923211121714172028132099782
Percentage of PaymentsToAcquireIntangibleAssets4.72.93.52.10.43.03.13.34.85.53.24.82.21.71.62.20.5

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value41514335424043313252373331533433
Percentage of PaymentsToAcquireIntangibleAssets6.66.57.16.67.77.19.76.17.610.39.27.97.510.18.09.2

us-gaap:OperatingSegments, cmcsa:BroadcastTelevision



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3633360372114437633
Percentage of PaymentsToAcquireIntangibleAssets0.50.80.50.60.51.10.00.617.22.21.01.00.71.31.40.80.8

us-gaap:OperatingSegments, cmcsa:CableCommunications



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value356464336303323332353328269381322327352412352289324
Percentage of PaymentsToAcquireIntangibleAssets57.658.855.357.159.059.379.364.264.275.179.777.984.678.882.680.585.7

us-gaap:OperatingSegments, cmcsa:CableNetworks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value374428654844312431
Percentage of PaymentsToAcquireIntangibleAssets0.50.90.70.80.41.41.31.01.01.61.01.00.72.30.90.80.3

us-gaap:OperatingSegments, cmcsa:FilmedEntertainment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value56565568666656433
Percentage of PaymentsToAcquireIntangibleAssets0.80.80.81.10.90.91.31.61.41.21.51.41.21.10.90.80.8

us-gaap:OperatingSegments, cmcsa:SkyLimited



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value166216188152151
Percentage of PaymentsToAcquireIntangibleAssets26.927.430.928.627.6

us-gaap:OperatingSegments, cmcsa:ThemeParks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value151681719152311916211826132419209
Percentage of PaymentsToAcquireIntangibleAssets2.42.01.33.23.52.75.223.33.84.14.56.23.14.64.55.62.4

us-gaap:StatementBusinessSegments

cmcsa:NBCUniversalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value67866365717478166130986973551026762
Percentage of PaymentsToAcquireIntangibleAssets10.810.910.412.213.013.217.532.531.019.317.117.413.219.515.717.3

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value-182166116426-31-81-25594-3234436-18417601202435-48914170-545596-71-16441-17-14019-637171-45
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfOtherDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value743943795819207220844395583082126513435439081059584432503482568727579093990322602247384181137681311295631759612
Percentage of RepaymentsOfOtherDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value5456516748534964485046553939394533303541302731342623262722182122191414
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value93-5-6-1762163228235294199254201178227247216259190431317407424159173172123136144152239259291292261215
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-312010-03-31
Value1427910111219387810641034143210361490126982810111130919990790175412671593157759157757837736335634851149145945726385
Percentage of StockRepurchasedAndRetiredDuringPeriodValue152.7-1580.0-1683.3-658.8311.3538.7466.7440.0487.1520.6586.6631.3465.2445.4457.5425.5382.2415.8407.0399.7391.4371.9371.7333.5336.0306.5266.9247.2228.9213.8189.6157.7156.5100.839.5

us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value23-114-80-4-2-603-3-107-319015622544-34-737361227-1124-60
Percentage of StockholdersEquityOther100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-13031014181923-1120-253-80-91-2365-439961656-611-3-4-9117-24
Percentage of StockholdersEquityOther-56.5-0.075.0-125.00.0-100.0-9050.0-153.3100.0366.7-1.9-0.0-281.1-51.3-4550.0-575.0-191.20.00.0-12.38.216.7600.02800.0-22.2-1100.0-2.466.70.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-09-30
Value-46302-20
Percentage of StockholdersEquityOther-17.4150.0-37.50.0-100.03.3-0.0

us-gaap:StatementEquityComponents

us-gaap:TemporaryEquityOtherChanges

cmcsa:RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-153-10-9-11-8-8-11-14-10-9-1052-118682-10-10
Percentage of TemporaryEquityOtherChanges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:AccruedParticipationsAndResidualsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value18941730161516831739180818091731165916831811188218111726157015421510157214911583138713471444136412561239137216251469135012821300139412551247123511520
Percentage of AccruedParticipationsAndResidualsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

cmcsa:CarryingAmountOfRedeemablePreferredStock

cmcsa:AirTouch



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value17001700160016001600160016001500150015001500
Percentage of CarryingAmountOfRedeemablePreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cmcsa:CollateralizedObligation



Period End2020-03-312019-12-312019-09-302018-12-31
Value5166516651650
Percentage of CollateralizedObligation100.0100.0100.00.0

cmcsa:EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostCurrent



Period End2020-03-31
Value0.0
Percentage of EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostCurrent0.0

cmcsa:FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent



Period End2020-03-31
Value12385
Percentage of FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent100.0

cmcsa:InvestmentSecuringCollateralizedObligation



Period End2020-03-312019-12-312019-09-302018-12-31
Value6126948160
Percentage of InvestmentSecuringCollateralizedObligation100.0100.0100.00.0

us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value45544543453945354529451645404572460746354664470347332366238324022417243221002114212221312150214921462138213621332129212221182114210920952092208920842071
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value11412117111115911381111611145693009142905292538549845981118622809072556952759570527529663468856679674966456972596459585545602655694846488049784650462939742028
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNetNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1323133712611306137913991300939721569488641684
Percentage of AccountsReceivableNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10136105161019310304883210721597659565554626658495858586262825201515557295462545550935808529354616785741879677924741977195931611747315770412449965274544126682512
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value767543201-43-431710402321111134476718277180182972222222222242622222322
Percentage of AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value-257-265-301-309-318-325-294-302-310-260-270-276-282-219-8-8-8-654686868-70-70-71-71501071099554595858232016195566
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-31
Value-1495637-1629-50846-75150133277153166151-37-1077665-34-135-113-88-115-75-41-25-35-37-31-39-25-5-1-8-5-6-263-1-4-4
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value612419475546425352317295293288277265239250268255218226236225193205223227209221214201193198195200168202203188153173175
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AociLossCashFlowHedgeCumulativeGainLossAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value871391621325455282620
Percentage of AociLossCashFlowHedgeCumulativeGainLossAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value10781083105510371001991
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value27865281802799227996278192758925167251402470224256356023540934854
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value263427682944264224852182163317461578155215721448123411321340161113931302126511229709159768477768981001946903851887102779083
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value894618663888786650
Percentage of DeferredRevenueNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStockOption



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value760493529594670437489541607404451502569375425448496337385
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value16001100120014001500110091499211008068869151000712771831903635
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized210.5223.1226.8235.7223.9251.7186.9183.4181.2199.5196.5182.3175.7189.9181.4185.5182.1188.4

us-gaap:EquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value47775347536357194960403541634007361535463351310424262376121210991077678801844114910191024100410189891040108211881164113547134880
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

cmcsa:Atairos



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value280032003200340031002700290027002400238822252233162416013634023890
Percentage of EquityMethodInvestments58.659.859.759.562.566.969.767.466.467.366.471.966.967.430.036.636.10.0

us-gaap:EquitySecuritiesFvNi



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value320353862577538341322451433
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

cmcsa:Peloton



Period End2020-03-312019-12-312019-09-30
Value275294260
Percentage of EquitySecuritiesFvNi85.983.330.2

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value189218961933205719421805152812791186
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value16292172171676415894150421419413391129601246512785123711190011442110131067810299100859868112511085510507-1017096499466914188748570827379657662757373256978666562606017564797918711
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value774272875990484639973429
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization47.542.342.237.936.334.7

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312011-12-312010-12-312009-12-31
Value744682956682581951104442338746824370
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization45.748.247.145.546.445.050.847.850.2

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312011-09-302011-06-302010-12-31
Value1104163512881065898798577757388840
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.89.59.18.38.28.192.395.490.3

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ComputerSoftwareIntangibleAsset



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value156311535711395825870176008
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312011-12-312010-12-312009-12-31
Value2123622884250461361213478133961507955545515
Percentage of FiniteLivedIntangibleAssetsGross135.9149.0219.8164.8192.1223.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1176039583885272424431994
Percentage of FiniteLivedIntangibleAssetsGross75.225.834.133.034.833.2

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:HeldToMaturitySecuritiesCurrent

cmcsa:AirTouch



Period End2020-03-312019-12-31
Value17001600
Percentage of HeldToMaturitySecuritiesCurrent100.0100.0

us-gaap:IndefiniteLivedFranchiseRights



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value593655936559365593655936559365593655936559365593645936459364593645936459364593645936459364593645936459364593645936459364593645936459364593645936459364593645936459364593765944259442594425944259452
Percentage of IndefiniteLivedFranchiseRights100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:FranchiseRights



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value593655936559365593645936459364
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0

us-gaap:TradeNames



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value088099633298129812857
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.014.816.25.05.04.8

us-gaap:IntangibleAssetsGrossExcludingGoodwill



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1103291127101119179092887651861788651485567
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Investments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value87839392999910156924579777811752071106950670865545949534439113772371333303460314333933737366053975479734378049064827477897352102491037799089621108931078567515997
Percentage of Investments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1006049776599847101248104464107345697116194663678594225972057210582765556657095526295151548994446054463642953440174482743602445814456744188441144504938082357913417535080379423852238209381302961527940
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherIntangibleAssetsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3467236128351643607636902383581864918848183391877918733189071901417274173561720416832169461689616802168521698017089172331714517329173341744017584178401787117786180011816517386173913431
Percentage of OtherIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1794179618411803180517961798178317891785
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12591372136813291316131613171343135413571353145114561446122116998168961627916158160141582715509143
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cmcsa:RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value1259137213681329131613161317134313541357135314511456144613261248123612211066957
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0

us-gaap:RestrictedCashCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value47424779494647566460
Percentage of RestrictedCashCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4647482150493959608383
Percentage of RestrictedCashNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementClassOfStock

us-gaap:TreasuryStockShares

us-gaap:CommonClassA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value872872872872872872872872872872872872872436436436436436365365365365365365365365365365365365365365365365365365365365365
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock


us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:StatementGeographical


us-gaap:Revenues us-gaap:ConsolidationItems


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


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


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


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


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


us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents


us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments