0001166691-21-000036 | 10-Q | XBRL Viewer

Label	Element	Value
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, After Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax	$ 8,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, After Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax	7,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, After Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax	25,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, After Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentAfterTax	25,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	7,069,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	997,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	179,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	434,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(248,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(12,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	1,349,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	971,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(335,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(98,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	8,957,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	6,411,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	985,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	340,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(174,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(127,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(114,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	910,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	515,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(264,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	11,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	7,583,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	20,972,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	3,847,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	833,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	593,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(643,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(238,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	4,392,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	1,895,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(876,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(87,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	26,297,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	18,663,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	4,150,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	963,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(480,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(430,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(224,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	3,979,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	1,815,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	(846,000,000)
Adjusted EBITDA	cmcsa_AdjustedEBITDA	29,000,000
Adjusted EBITDA	cmcsa_AdjustedEBITDA	23,640,000,000
Other Programming And Production Expense	cmcsa_OtherProgrammingAndProductionExpense	307,000,000
Other Programming And Production Expense	cmcsa_OtherProgrammingAndProductionExpense	276,000,000
Other Programming And Production Expense	cmcsa_OtherProgrammingAndProductionExpense	868,000,000
Other Programming And Production Expense	cmcsa_OtherProgrammingAndProductionExpense	822,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Cost	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCost	6,088,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Cost	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCost	6,631,000,000
Equity Method Investments and Certain Retained Distributions	cmcsa_EquityMethodInvestmentsAndCertainRetainedDistributions	5,200,000,000
Equity Method Investments and Certain Retained Distributions	cmcsa_EquityMethodInvestmentsAndCertainRetainedDistributions	3,900,000,000
Film, Monetized On Its Own Capitalized Cost, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances	cmcsa_FilmMonetizedOnItsOwnCapitalizedCostAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvances	12,645,000,000
Film, Monetized On Its Own Capitalized Cost, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances	cmcsa_FilmMonetizedOnItsOwnCapitalizedCostAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvances	13,340,000,000
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Tax	cmcsa_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterTax	(178,000,000)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Tax	cmcsa_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterTax	(203,000,000)
Capital Contribution To VIE	cmcsa_CapitalContributionToVIE	36,000,000
Capital Contribution To VIE	cmcsa_CapitalContributionToVIE	184,000,000
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	(100,000,000)
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	400,000,000
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	600,000,000
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	0
Goodwill, Foreign Currency Translation And Other	cmcsa_GoodwillForeignCurrencyTranslationAndOther	1,000,000,000.0
Film, Monetized On Its Own, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Costs, Noncurrent	cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent	12,645,000,000
Film, Monetized On Its Own, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Costs, Noncurrent	cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent	13,340,000,000
Line of Credit Facility, Potential Increase To Maximum Borrowing Capacity	cmcsa_LineOfCreditFacilityPotentialIncreaseToMaximumBorrowingCapacity	14,000,000,000
Temporary Equity, Redemption Of Preferred Stock	cmcsa_TemporaryEquityRedemptionOfPreferredStock	0
Temporary Equity, Redemption Of Preferred Stock	cmcsa_TemporaryEquityRedemptionOfPreferredStock	0
Temporary Equity, Redemption Of Preferred Stock	cmcsa_TemporaryEquityRedemptionOfPreferredStock	725,000,000
Temporary Equity, Redemption Of Preferred Stock	cmcsa_TemporaryEquityRedemptionOfPreferredStock	0
Contributions From And Distributions To Noncontrolling Interests Attributable To Temporary Equity	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity	(19,000,000)
Contributions From And Distributions To Noncontrolling Interests Attributable To Temporary Equity	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity	(9,000,000)
Contributions From And Distributions To Noncontrolling Interests Attributable To Temporary Equity	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity	(59,000,000)
Contributions From And Distributions To Noncontrolling Interests Attributable To Temporary Equity	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity	(46,000,000)
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	30,000,000
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	187,000,000
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	79,000,000
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	217,000,000
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	(177,000,000)
Adjustments for Items Excluded from Adjusted EBITDA	cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA	(177,000,000)
Other Income Loss Net	cmcsa_OtherIncomeLossNet	59,000,000
Other Income Loss Net	cmcsa_OtherIncomeLossNet	62,000,000
Other Income Loss Net	cmcsa_OtherIncomeLossNet	146,000,000
Other Income Loss Net	cmcsa_OtherIncomeLossNet	187,000,000
Film, Monetized On Its Own, Capitalized Cost, In Production And In Development	cmcsa_FilmMonetizedOnItsOwnCapitalizedCostInProductionAndInDevelopment	2,598,000,000
Film, Monetized On Its Own, Capitalized Cost, In Production And In Development	cmcsa_FilmMonetizedOnItsOwnCapitalizedCostInProductionAndInDevelopment	2,755,000,000
Contributions From And Distributions To Noncontrolling Interests	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests	55,000,000
Contributions From And Distributions To Noncontrolling Interests	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests	185,000,000
Contributions From And Distributions To Noncontrolling Interests	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests	379,000,000
Contributions From And Distributions To Noncontrolling Interests	cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests	200,000,000
Collateralized Obligation	cmcsa_CollateralizedObligation	5,169,000,000
Collateralized Obligation	cmcsa_CollateralizedObligation	5,168,000,000
Collateralized Obligation	cmcsa_CollateralizedObligation	5,200,000,000
Collateralized Obligation	cmcsa_CollateralizedObligation	5,200,000,000
Payments For Construction Of Theme Park	cmcsa_PaymentsForConstructionOfThemePark	825,000,000
Payments For Construction Of Theme Park	cmcsa_PaymentsForConstructionOfThemePark	1,118,000,000
Gain (Loss) On Investments And Other Noncash Income (Loss) Net	cmcsa_GainLossOnInvestmentsAndOtherNoncashIncomeLossNet	1,953,000,000
Gain (Loss) On Investments And Other Noncash Income (Loss) Net	cmcsa_GainLossOnInvestmentsAndOtherNoncashIncomeLossNet	(514,000,000)
Noncash Interest Expense (Income) Net	cmcsa_NoncashInterestExpenseIncomeNet	287,000,000
Noncash Interest Expense (Income) Net	cmcsa_NoncashInterestExpenseIncomeNet	606,000,000
Proceeds From Sales Of Businesses And Investments	cmcsa_ProceedsFromSalesOfBusinessesAndInvestments	500,000,000
Proceeds From Sales Of Businesses And Investments	cmcsa_ProceedsFromSalesOfBusinessesAndInvestments	$ 2,131,000,000
Number of Preferred Stock Series	cmcsa_NumberOfPreferredStockSeries	2
Number of Preferred Stock Series	cmcsa_NumberOfPreferredStockSeries	3
Accrued Participations And Residuals, Current	cmcsa_AccruedParticipationsAndResidualsCurrent	$ 1,683,000,000
Accrued Participations And Residuals, Current	cmcsa_AccruedParticipationsAndResidualsCurrent	1,706,000,000
Payments For Repurchase Of Redeemable Subsidiary Preferred Stock	cmcsa_PaymentsForRepurchaseOfRedeemableSubsidiaryPreferredStock	725,000,000
Video Distribution Programming Expense	cmcsa_VideoDistributionProgrammingExpense	3,337,000,000
Video Distribution Programming Expense	cmcsa_VideoDistributionProgrammingExpense	3,089,000,000
Video Distribution Programming Expense	cmcsa_VideoDistributionProgrammingExpense	10,267,000,000
Video Distribution Programming Expense	cmcsa_VideoDistributionProgrammingExpense	9,351,000,000
Change In Current And Noncurrent Receivables Net	cmcsa_ChangeInCurrentAndNoncurrentReceivablesNet	720,000,000
Change In Current And Noncurrent Receivables Net	cmcsa_ChangeInCurrentAndNoncurrentReceivablesNet	(982,000,000)
Programming And Production Costs	cmcsa_ProgrammingAndProductionCosts	10,395,000,000
Programming And Production Costs	cmcsa_ProgrammingAndProductionCosts	8,565,000,000
Programming And Production Costs	cmcsa_ProgrammingAndProductionCosts	28,570,000,000
Programming And Production Costs	cmcsa_ProgrammingAndProductionCosts	23,683,000,000
Net Income (Loss) Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock	cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	(104,000,000)
Net Income (Loss) Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock	cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	12,000,000
Net Income (Loss) Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock	cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	(249,000,000)
Net Income (Loss) Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock	cmcsa_NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	110,000,000
Film And Television Costs Net	cmcsa_Increasedecreaseinfilmandtelevisioncostnet	541,000,000
Film And Television Costs Net	cmcsa_Increasedecreaseinfilmandtelevisioncostnet	(163,000,000)
Collateralized Obligation, Fair Value	cmcsa_CollateralizedObligationFairValue	5,200,000,000
Collateralized Obligation, Fair Value	cmcsa_CollateralizedObligationFairValue	5,200,000,000
Payments For Repurchase and Redemption of Subsidiary Preferred Stock	cmcsa_PaymentsForRepurchaseandRedemptionofSubsidiaryPreferredStock	1,800,000,000
Film, Monetized On Its Own, Amortization Expense, Including Participations And Residuals	cmcsa_FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals	2,215,000,000
Film, Monetized On Its Own, Amortization Expense, Including Participations And Residuals	cmcsa_FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals	1,674,000,000
Film, Monetized On Its Own, Amortization Expense, Including Participations And Residuals	cmcsa_FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals	6,406,000,000
Film, Monetized On Its Own, Amortization Expense, Including Participations And Residuals	cmcsa_FilmMonetizedOnItsOwnAmortizationExpenseIncludingParticipationsAndResiduals	5,737,000,000
Proceeds From Collateralized Obligation	cmcsa_ProceedsFromCollateralizedObligation	5,200,000,000
Other Operating And Administrative	cmcsa_OtherOperatingAndAdministrative	8,981,000,000
Other Operating And Administrative	cmcsa_OtherOperatingAndAdministrative	8,059,000,000
Other Operating And Administrative	cmcsa_OtherOperatingAndAdministrative	25,799,000,000
Other Operating And Administrative	cmcsa_OtherOperatingAndAdministrative	23,959,000,000
Investment Securing Collateralized Obligation	cmcsa_InvestmentSecuringCollateralizedObligation	563,000,000
Investment Securing Collateralized Obligation	cmcsa_InvestmentSecuringCollateralizedObligation	447,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax	2,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax	2,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax	7,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan And Other, After Reclassification Adjustment, Tax	cmcsa_OtherComprehensiveIncomeLossDefinedBenefitPlanAndOtherAfterReclassificationAdjustmentTax	8,000,000
Variable Interest Entity, Reporting Entity Involvement, Unfunded Capital Commitment	cmcsa_VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment	1,500,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Amortization Expense	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense	4,536,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Amortization Expense	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense	3,526,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Amortization Expense	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense	11,028,000,000
Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Amortization Expense	cmcsa_EntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesAmortizationExpense	$ 7,774,000,000

Supplemental Financial Information (Noncash Activities) (Details) - USD ($) $ in Billions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Supplemental Financial Information [Line Items]
Property and equipment and intangible assets accrued but not yet paid	$ 1.6	$ 1.9

Print Document View Excel Document
Notes Details Supplemental Financial Information (Noncash Activities) (Details) Uncategorized Uncategorized Items - cmcsa-20210930_htm.xml All Reports