$CMCSA
COMCAST CORP Stock $cmcsa

$cmcsa Overview Financials Valuation SEC Filings Company Website

2014 Q3 Form 10-Q Financial Statement

#000119312514379913 Filed on October 23, 2014

Income Statement

Concept	2014 Q3	2013 Q4	2013 Q3
Revenue	$16.79B	$16.93B	$16.15B
YoY Change	3.96%	6.21%	-2.38%
Cost Of Revenue	$4.772B	$5.252B	$4.787B
YoY Change	-0.31%	6.83%	-16.4%
Gross Profit	$12.02B	$11.67B	$11.36B
YoY Change	5.76%	5.93%	5.05%
Gross Profit Margin	71.58%	68.97%	70.36%
Selling, General & Admin	$6.315B	$6.029B	$6.034B
YoY Change	4.66%	4.96%	3.86%
% of Gross Profit	52.54%	51.64%	53.1%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.539B	$1.998B	$1.520B
YoY Change	1.25%	0.76%	-1.87%
% of Gross Profit	12.8%	17.11%	13.38%
Operating Expenses	$8.274B	$8.027B	$7.950B
YoY Change	4.08%	3.88%	2.32%
Operating Profit	$3.745B	$3.647B	$3.414B
YoY Change	9.7%	10.72%	12.01%
Interest Expense	$663.0M	-$619.0M	$639.0M
YoY Change	3.76%	11.53%	0.95%
% of Operating Profit	17.7%	-16.97%	18.72%
Other Income/Expense, Net	-$705.0M	-$70.00M	-$615.0M
YoY Change	14.63%	-53.95%	-146.07%
Pretax Income	$3.040B	$2.954B	$2.799B
YoY Change	8.61%	14.27%	-36.14%
Income Tax	$407.0M	$986.0M	$1.021B
% Of Pretax Income	13.39%	33.38%	36.48%
Net Earnings	$2.592B	$1.913B	$1.732B
YoY Change	49.65%	26.02%	-18.03%
Net Earnings / Revenue	15.44%	11.3%	10.72%
Basic Earnings Per Share	$1.00	$0.73	$0.66
Diluted Earnings Per Share	$0.99	$0.72	$0.65
COMMON SHARES
Basic Shares Outstanding	2.580B shares		2.622B shares
Diluted Shares Outstanding	2.616B shares		2.658B shares

Balance Sheet

Concept	2014 Q3	2013 Q4	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$5.135B	$6.063B	$6.393B
YoY Change	-19.68%	-60.74%	-50.99%
Cash & Equivalents	$4.547B	$1.718B	$1.603B
Short-Term Investments	$588.0M	$4.345B	$4.790B
Other Short-Term Assets	$1.694B	$1.480B	$2.171B
YoY Change	-21.97%	29.14%	35.18%
Inventory
Prepaid Expenses
Receivables	$6.172B	$6.376B	$5.501B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$13.94B	$14.08B	$13.41B
YoY Change	3.95%	-29.59%	-25.79%
LONG-TERM ASSETS
Property, Plant & Equipment	$30.36B	$29.84B	$28.81B
YoY Change	5.4%	9.58%	6.75%
Goodwill	$27.32B	$27.10B
YoY Change		0.42%
Intangibles
YoY Change
Long-Term Investments	$1.024B	$989.0M	$1.040B
YoY Change	-1.54%	-15.03%	-8.37%
Other Assets	$2.474B	$2.343B	$2.345B
YoY Change	5.5%	7.48%	7.37%
Total Long-Term Assets	$145.3B	$144.7B	$143.2B
YoY Change	1.48%	-0.17%	-0.83%
TOTAL ASSETS
Total Short-Term Assets	$13.94B	$14.08B	$13.41B
Total Long-Term Assets	$145.3B	$144.7B	$143.2B
Total Assets	$159.2B	$158.8B	$156.6B
YoY Change	1.69%	-3.73%	-3.61%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.680B	$5.528B	$6.032B
YoY Change	-5.84%	-10.92%	-3.49%
Accrued Expenses	$5.461B	$7.967B	$9.296B
YoY Change	-41.25%	34.33%	51.97%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$3.523B	$3.280B	$2.337B
YoY Change	50.75%	38.05%	-16.51%
Total Short-Term Liabilities	$17.08B	$18.91B	$18.67B
YoY Change	-8.48%	13.15%	7.68%
LONG-TERM LIABILITIES
Long-Term Debt	$44.83B	$44.57B	$44.19B
YoY Change	1.45%	17.03%	23.46%
Other Long-Term Liabilities	$10.39B	$11.38B	$11.49B
YoY Change	-9.61%	-14.22%	-10.63%
Total Long-Term Liabilities	$10.39B	$11.38B	$55.68B
YoY Change	-81.34%	-14.22%	332.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$17.08B	$18.91B	$18.67B
Total Long-Term Liabilities	$10.39B	$11.38B	$55.68B
Total Liabilities	$27.47B	$30.30B	$106.9B
YoY Change	-74.3%	1.04%	253.96%
SHAREHOLDERS EQUITY
Retained Earnings	$21.81B	$19.24B
YoY Change		18.15%
Common Stock	$30.00M	$30.00M	$30.00M
YoY Change	0.0%	-3.23%	-3.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$7.517B	$7.517B
YoY Change		0.0%
Treasury Stock Shares
Shareholders Equity	$53.30B	$50.69B	$49.72B
YoY Change
Total Liabilities & Shareholders Equity	$159.2B	$158.8B	$156.6B
YoY Change	1.69%	-3.73%	-3.61%

Cashflow Statement

Concept	2014 Q3	2013 Q4	2013 Q3
OPERATING ACTIVITIES
Net Income	$2.592B	$1.913B	$1.732B
YoY Change	49.65%	26.02%	-18.03%
Depreciation, Depletion And Amortization	$1.539B	$1.998B	$1.520B
YoY Change	1.25%	0.76%	-1.87%
Cash From Operating Activities	$4.755B	$2.481B	$3.994B
YoY Change	19.05%	-31.37%	16.65%
INVESTING ACTIVITIES
Capital Expenditures	$1.950B	-$2.318B	$1.726B
YoY Change	12.98%	16.54%	9.1%
Acquisitions
YoY Change
Other Investing Activities	$16.00M	$131.0M	-$391.0M
YoY Change	-104.09%	-1971.43%	-107.65%
Cash From Investing Activities	-$2.192B	-$2.187B	-$2.367B
YoY Change	-7.39%	9.57%	-170.89%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	455.0M	-179.0M	-1.413B
YoY Change	-132.2%	-141.34%	-4137.14%
NET CHANGE
Cash From Operating Activities	4.755B	2.481B	3.994B
Cash From Investing Activities	-2.192B	-2.187B	-2.367B
Cash From Financing Activities	455.0M	-179.0M	-1.413B
Net Change In Cash	3.018B	115.0M	214.0M
YoY Change	1310.28%	-94.4%	-96.85%
FREE CASH FLOW
Cash From Operating Activities	$4.755B	$2.481B	$3.994B
Capital Expenditures	$1.950B	-$2.318B	$1.726B
Free Cash Flow	$2.805B	$4.799B	$2.268B
YoY Change	23.68%	-14.36%	23.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	81000000	USD
CY2014Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Obligations FairValueLiabilitiesMeasuredOnRecurringBasisObligations	818000000	USD
CY2013Q3	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	958000000	USD
CY2014Q3	cmcsa	Operating Income Excluding Depreciation And Amortization OperatingIncomeExcludingDepreciationAndAmortization	5704000000	USD
CY2014Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	16791000000	USD
CY2013Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	16151000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	45000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	10000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-10000000	USD
CY2014Q3	us-gaap	Indefinite Lived Franchise Rights IndefiniteLivedFranchiseRights	59364000000	USD
CY2013Q4	us-gaap	Assets Assets	158813000000	USD
CY2014Q3	us-gaap	Debt Current DebtCurrent	3523000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	31935000000	USD
CY2014Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	38977000000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	50694000000	USD
CY2014Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	44821000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	10000000	USD
CY2013Q4	cmcsa	Total Film And Television Costs And Programming Rights After Amortization TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization	5922000000	USD
CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	989000000	USD
CY2013Q4	cmcsa	Derivative Fair Value Of Embedded Derivative Liability Component Of Prepaid Forward Sale Agreements DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements	2800000000	USD
CY2013Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	4263000000	USD
CY2014Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2650000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-19000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	735000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-83000000	USD
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	3172000000	USD
	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	10761000000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	2829000000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2592000000	shares
CY2013Q4	us-gaap	Short Term Investments ShortTermInvestments	3573000000	USD
CY2013Q4	us-gaap	Indefinite Lived Franchise Rights IndefiniteLivedFranchiseRights	59364000000	USD
CY2014Q3	us-gaap	Assets Assets	159237000000	USD
CY2013Q4	cmcsa	Accrued Participations And Residuals Current AccruedParticipationsAndResidualsCurrent	1239000000	USD
CY2014Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10388000000	USD
CY2014Q3	us-gaap	Stockholders Equity StockholdersEquity	53298000000	USD
CY2014Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	5461000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	19000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10951000000	USD
CY2014Q3	us-gaap	Cost Method Investments CostMethodInvestments	2048000000	USD
CY2014Q3	us-gaap	Equity Method Investments EquityMethodInvestments	1024000000	USD
CY2014Q3	cmcsa	Derivative Fair Value Of Embedded Derivative Liability Component Of Prepaid Forward Sale Agreements DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements	277000000	USD
CY2013Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4536000000	USD
CY2014Q3	us-gaap	Liabilities Current LiabilitiesCurrent	17084000000	USD
CY2013Q4	cmcsa	Derivative Fair Value Of Embedded Derivative Liability Component Of Prepaid Forward Sale Agreements And Indexed Debt Instruments DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreementsAndIndexedDebtInstruments	2816000000	USD
CY2014Q3	cmcsa	Derivative Fair Value Of Embedded Derivative Liability Component Of Prepaid Forward Sale Agreements And Indexed Debt Instruments DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreementsAndIndexedDebtInstruments	288000000	USD
CY2014Q3	cmcsa	Other Stockholders Equity OtherStockholdersEquity	53268000000	USD
CY2014Q3	us-gaap	Goodwill Goodwill	27323000000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	27098000000	USD
CY2013Q4	us-gaap	Debt Current DebtCurrent	3280000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13700000000	USD
CY2013Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	38890000000	USD
CY2014Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	21805000000	USD
CY2014Q3	cmcsa	Equity Securities Held As Collateral EquitySecuritiesHeldAsCollateral	444000000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29840000000	USD
CY2014Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2474000000	USD
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	5528000000	USD
CY2014Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	32227000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	3000000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	158813000000	USD
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-34000000	USD
CY2014Q3	cmcsa	Programming Rights Less Amortization ProgrammingRightsLessAmortization	2271000000	USD
CY2013Q4	cmcsa	Equity Securities Held As Collateral EquitySecuritiesHeldAsCollateral	3959000000	USD
CY2013Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Obligations FairValueLiabilitiesMeasuredOnRecurringBasisObligations	747000000	USD
CY2013Q4	us-gaap	Investments Investments	7343000000	USD
CY2014Q3	cmcsa	Liabilities Related To Prepaid Forward Sale Agreements LiabilitiesRelatedToPrepaidForwardSaleAgreements	394000000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	389000000	USD
CY2013Q4	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	16000000	USD
CY2014Q3	cmcsa	Contingent Consideration Fair Value ContingentConsiderationFairValue	653000000	USD
CY2013Q4	cmcsa	Returns And Incentives Allowance ReturnsAndIncentivesAllowance	375000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-70000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-2000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-23000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-82000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4593000000	USD
CY2014Q3	cmcsa	Accrued Expenses And Other Current Liabilities Including Deferred Revenue AccruedExpensesAndOtherCurrentLiabilitiesIncludingDeferredRevenue	6437000000	USD
CY2014Q3	us-gaap	Long Term Investments LongTermInvestments	3129000000	USD
CY2013Q4	us-gaap	Long Term Investments LongTermInvestments	3770000000	USD
CY2014Q3	cmcsa	Film And Television Costs FilmAndTelevisionCosts	5560000000	USD
CY2013Q4	cmcsa	Film And Television Costs FilmAndTelevisionCosts	4994000000	USD
CY2013Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2014Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	53653000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	51058000000	USD
CY2014Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9649000000	USD
CY2014Q3	cmcsa	Redeemable Noncontrolling Interests And Redeemable Subsidiary Preferred Stock RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	1058000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	22000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	127000000	USD
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2442000000	USD
CY2014Q3	us-gaap	Short Term Investments ShortTermInvestments	531000000	USD
CY2013Q4	us-gaap	Marketable Securities MarketableSecurities	4345000000	USD
CY2014Q3	us-gaap	Marketable Securities MarketableSecurities	588000000	USD
CY2014Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	3000000	USD
CY2013Q4	cmcsa	Liabilities Related To Prepaid Forward Sale Agreements LiabilitiesRelatedToPrepaidForwardSaleAgreements	3611000000	USD
CY2013Q4	cmcsa	Obligations Under Prepaid Forward Sale Agreements ObligationsUnderPrepaidForwardSaleAgreements	811000000	USD
CY2014Q3	us-gaap	Trading Securities TradingSecurities	450000000	USD
CY2014Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	137000000	USD
CY2013Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	82000000	USD
CY2014Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1959000000	USD
CY2014Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	36000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2668000000	shares
	cmcsa	Other Operating And Administrative OtherOperatingAndAdministrative	13787000000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	39926000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-96000000	USD
	us-gaap	Profit Loss ProfitLoss	6596000000	USD
CY2014Q3	cmcsa	Acquiree Stockholders Percentage Ownership In Parent Company AcquireeStockholdersPercentageOwnershipInParentCompany	0.24	pure
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	477000000	USD
CY2013Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1283000000	USD
CY2013Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-615000000	USD
CY2014Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	420000000	USD
CY2014Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	407000000	USD
	cmcsa	Programming And Production Costs ProgrammingAndProductionCosts	14418000000	USD
	cmcsa	Equity Profit Loss EquityProfitLoss	4984000000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	5929000000	USD
CY2014Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.225
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	38000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-18000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-10000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-6000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	11679000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5196000000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	4182000000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	2933000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-140000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3393000000	USD
	dei	Document Period End Date DocumentPeriodEndDate	2014-09-30
CY2013Q4	cmcsa	Accrued Expenses And Other Current Liabilities Including Deferred Revenue AccruedExpensesAndOtherCurrentLiabilitiesIncludingDeferredRevenue	8865000000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	30000000	USD
CY2014Q3	us-gaap	Assets Current AssetsCurrent	13936000000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	14075000000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11384000000	USD
CY2014Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2014Q3	us-gaap	Minority Interest MinorityInterest	355000000	USD
CY2013Q4	us-gaap	Minority Interest MinorityInterest	364000000	USD
CY2014Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2609000000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1545000000	USD
CY2013Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	7967000000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	42574000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8874000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	2000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-26000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-22000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2013Q4	us-gaap	Cost Method Investments CostMethodInvestments	2009000000	USD
CY2014Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	736000000	USD
CY2014Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	1767000000	USD
CY2014Q3	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	81000000	USD
CY2014Q3	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	68000000	USD
CY2014Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	30362000000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2343000000	USD
CY2014Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	5680000000	USD
CY2014Q3	cmcsa	Accrued Participations And Residuals Current AccruedParticipationsAndResidualsCurrent	1444000000	USD
CY2013Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	44567000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	56000000	USD
CY2014Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	159237000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	34000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-60000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-16000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	9000000	USD
	cmcsa	Proceeds From Sales Of Businesses And Investments ProceedsFromSalesOfBusinessesAndInvestments	622000000	USD
	cmcsa	Proceeds From Sales Of Businesses And Investments ProceedsFromSalesOfBusinessesAndInvestments	655000000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	1676000000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	1454000000	USD
CY2013Q4	cmcsa	Programming Rights Current ProgrammingRightsCurrent	928000000	USD
CY2014Q3	us-gaap	Other Assets Current OtherAssetsCurrent	1694000000	USD
CY2013Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2014Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	976000000	USD
CY2013Q4	cmcsa	Redeemable Noncontrolling Interests And Redeemable Subsidiary Preferred Stock RedeemableNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	957000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-5000000	USD
CY2014Q3	cmcsa	Total Film And Television Costs And Programming Rights After Amortization TotalFilmAndTelevisionCostsAndProgrammingRightsAfterAmortization	6552000000	USD
CY2014Q3	us-gaap	Investments Investments	3660000000	USD
CY2014Q3	cmcsa	Obligations Under Prepaid Forward Sale Agreements ObligationsUnderPrepaidForwardSaleAgreements	117000000	USD
CY2013Q4	us-gaap	Trading Securities TradingSecurities	3956000000	USD
CY2014Q3	us-gaap	Other Liabilities Fair Value Disclosure OtherLiabilitiesFairValueDisclosure	8000000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	221000000	USD
CY2014Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	6679000000	USD
CY2014Q3	cmcsa	Returns And Incentives Allowance ReturnsAndIncentivesAllowance	284000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-41000000	USD
CY2013Q4	cmcsa	Other Stockholders Equity OtherStockholdersEquity	50664000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1718000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-29000000	USD
CY2013Q3	us-gaap	Interest Paid Net InterestPaidNet	636000000	USD
CY2013Q3	cmcsa	Operating Income Excluding Depreciation And Amortization OperatingIncomeExcludingDepreciationAndAmortization	5330000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	136000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-4000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	8000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-4000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6402000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4804000000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	145000000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1177000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	33000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	35000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-57000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	6543000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-9000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	3000000	USD
	cmcsa	Payments For Acquisitions And Construction Of Real Estate Properties PaymentsForAcquisitionsAndConstructionOfRealEstateProperties	28000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7327000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2250000000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1480000000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	3745000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1000000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1591000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-6000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-36000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	694000000	USD
	cmcsa	Payments For Acquisitions And Construction Of Real Estate Properties PaymentsForAcquisitionsAndConstructionOfRealEstateProperties	1705000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6080000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1500000000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-9348000000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	6376000000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2629000000	shares
CY2014Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	6172000000	USD
CY2014Q3	cmcsa	Programming Rights Current ProgrammingRightsCurrent	992000000	USD
CY2013Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2658000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2629000000	shares
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	42000000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1500000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	75000000	USD
	cmcsa	Contributions From And Distributions To Noncontrolling Interests ContributionsFromAndDistributionsToNoncontrollingInterests	-101000000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	93000000	USD
CY2014Q3	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	17089000000	USD
CY2013Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	17329000000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	18912000000	USD
CY2014Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	44827000000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	19235000000	USD
CY2014Q3	us-gaap	Treasury Stock Value TreasuryStockValue	7517000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-52000000	USD
	cmcsa	Change In Current And Noncurrent Receivables Net ChangeInCurrentAndNoncurrentReceivablesNet	-89000000	USD
	cmcsa	Change In Current And Noncurrent Receivables Net ChangeInCurrentAndNoncurrentReceivablesNet	-145000000	USD
	cmcsa	Fair Value Equity Securities Settlement FairValueEquitySecuritiesSettlement	3200000000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	310000000	USD
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	7517000000	USD
CY2014Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2014Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	898000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-11000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	49796000000	USD
CY2013Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	110000000	USD
CY2013Q4	cmcsa	Contingent Consideration Fair Value ContingentConsiderationFairValue	684000000	USD
CY2014Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	98000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3000000	USD
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2799000000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1021000000	USD
CY2014Q3	us-gaap	Interest Expense InterestExpense	663000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	301000000	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-38000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	5059000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	58000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	177000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12302000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-437000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	395000000	USD
	cmcsa	Settlement Of Station Venture Liability SettlementOfStationVentureLiability	602000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	97000000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3748000000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3737000000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-280000000	USD
	cmcsa	Noncash Interest Expense Income Net NoncashInterestExpenseIncomeNet	122000000	USD
	cmcsa	Operating Income Excluding Depreciation And Amortization OperatingIncomeExcludingDepreciationAndAmortization	15789000000	USD
CY2014Q3	cmcsa	Company Shares Exchanged For Each Acquiree Share CompanySharesExchangedForEachAcquireeShare	2.875	pure
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.46
CY2014Q3	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	29000000	USD
CY2013Q3	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	28000000	USD
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	39000000	shares
CY2014Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2616000000	shares
	cmcsa	Distributions To Noncontrolling Interests And Dividends For Redeemable Subsidiary Preferred Stock DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock	164000000	USD
	cmcsa	Distributions To Noncontrolling Interests And Dividends For Redeemable Subsidiary Preferred Stock DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock	170000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	178000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-53000000	USD
	cmcsa	Gain Loss On Investments And Noncash Other Income Expense Net GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet	239000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	358000000	USD
	dei	Entity Registrant Name EntityRegistrantName	COMCAST CORP
	dei	Entity Central Index Key EntityCentralIndexKey	0001166691
CY2013Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	36000000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	13000000	shares
	cmcsa	Contributions From And Distributions To Noncontrolling Interests ContributionsFromAndDistributionsToNoncontrollingInterests	-103000000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1748000000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	5873000000	USD
	cmcsa	Gain Loss On Investments And Noncash Other Income Expense Net GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet	24000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-108000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2878000000	USD
	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	47731000000	USD
	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	51043000000	USD
	dei	Trading Symbol TradingSymbol	cmcsa
CY2013Q3	cmcsa	Other Operating And Administrative OtherOperatingAndAdministrative	4751000000	USD
CY2014Q3	us-gaap	Depreciation Depreciation	1539000000	USD
CY2014Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-96000000	USD
	cmcsa	Programming And Production Costs ProgrammingAndProductionCosts	15554000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1204000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8161000000	USD
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	87000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2994000000	USD
	cmcsa	Noncash Interest Expense Income Net NoncashInterestExpenseIncomeNet	132000000	USD
CY2014Q3	cmcsa	Comcast Ownership In Cable Holding Company Subsidiaries ComcastOwnershipInCableHoldingCompanySubsidiaries	1	pure
CY2014Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.225
	cmcsa	Other Operating And Administrative OtherOperatingAndAdministrative	14695000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1820000000	USD
	cmcsa	Noncontrolling Interest Increase From Equity Issuance Or Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromEquityIssuanceOrSaleOfParentEquityInterest	13000000	USD
	cmcsa	Film And Television Costs Net FilmAndTelevisionCostsNet	471000000	USD
CY2014Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17000000	shares
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1537000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-99000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	91000000	USD
	cmcsa	Equity Profit Loss EquityProfitLoss	6547000000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	71000000	USD
CY2014Q3	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	6400000000	USD
CY2013Q3	us-gaap	Revenues Revenues	16151000000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	1778000000	USD
CY2013Q3	cmcsa	Net Income Loss Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	46000000	USD
CY2014Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	33000000	USD
	us-gaap	Depreciation Depreciation	4707000000	USD
	us-gaap	Depreciation Depreciation	4669000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1762000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1755000000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.86
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.99
	cmcsa	Amortization Of Film And Television Costs AmortizationOfFilmAndTelevisionCosts	5998000000	USD
CY2013Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	445000000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	176000000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	85000000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	84000000	USD
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div><p style='text-align:left;margin-top:0pt;margin-bottom:5.4pt;line-height:15pt;' ><font style='font-family:Helvetica;font-size:12pt;font-weight:bold;margin-left:0pt;' >Note 2: Recent Accounting Pronouncements</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:5.4pt;line-height:13pt;' ><font style='font-family:Helvetica;font-size:10pt;font-weight:bold;margin-left:0pt;' >Discontinued Operations</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:5.4pt;line-height:13pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In </font><font style='font-family:Times New Roman;font-size:10pt;' >April</font><font style='font-family:Times New Roman;font-size:10pt;' > 20</font><font style='font-family:Times New Roman;font-size:10pt;' >14</font><font style='font-family:Times New Roman;font-size:10pt;' >, the F</font><font style='font-family:Times New Roman;font-size:10pt;' >inancial </font><font style='font-family:Times New Roman;font-size:10pt;' >A</font><font style='font-family:Times New Roman;font-size:10pt;' >ccounting </font><font style='font-family:Times New Roman;font-size:10pt;' >S</font><font style='font-family:Times New Roman;font-size:10pt;' >tandards </font><font style='font-family:Times New Roman;font-size:10pt;' >B</font><font style='font-family:Times New Roman;font-size:10pt;' >oard (“FASB”) updated the accounting guidance related to discontinued operations. The updated accounting guidance provides a </font><font style='font-family:Times New Roman;font-size:10pt;' >narrower definition of discontinued operations than existing GAAP. The updated accounting guidance requires that only disposals of components of an entity, or groups of components, that represent a strategic shift that has or will have a material effect on</font><font style='font-family:Times New Roman;font-size:10pt;' > the reporting entity’s operations be reported in the financial statements as discontinued operations</font><font style='font-family:Times New Roman;font-size:10pt;' >.</font><font style='font-family:Times New Roman;font-size:10pt;' > The updated accounting guidance also provides guidance on the financial statement presentations and disclosures of discontinued operations. The updated a</font><font style='font-family:Times New Roman;font-size:10pt;' >ccounting guidance will be effective prospectively for us on January 1, 2015, with early adoption permitted in 2014.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:5.4pt;line-height:13pt;' ><font style='font-family:Helvetica;font-size:10pt;font-weight:bold;margin-left:0pt;' >Revenue Recognition</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:5.4pt;line-height:13pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In </font><font style='font-family:Times New Roman;font-size:10pt;' >May </font><font style='font-family:Times New Roman;font-size:10pt;' >20</font><font style='font-family:Times New Roman;font-size:10pt;' >14</font><font style='font-family:Times New Roman;font-size:10pt;' >, the </font><font style='font-family:Times New Roman;font-size:10pt;' >FASB</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >and the International Accounting Standards Board updated the accounting guidance related to reven</font><font style='font-family:Times New Roman;font-size:10pt;' >ue recognition. The updated accounting guidance provides a </font><font style='font-family:Times New Roman;font-size:10pt;' >single, contract-based revenue recognition model to help improve financial reporting by providing clearer guidance on when an entity should recognize revenue, and by reducing the number of standard</font><font style='font-family:Times New Roman;font-size:10pt;' >s to which entities have to refer. </font><font style='font-family:Times New Roman;font-size:10pt;' >The updated accounting guidance will be effective for us on January 1, 2017, and early adoption is not permitted. The updated accounting guidance allows for either a full retrospective adoption or modified retrospective a</font><font style='font-family:Times New Roman;font-size:10pt;' >doption. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements and our method of adoption. </font></p></div>
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
CY2013Q3	us-gaap	Depreciation Depreciation	1520000000	USD
CY2013Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-310000000	USD
CY2014Q3	us-gaap	Costs And Expenses CostsAndExpenses	13046000000	USD
CY2014Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3040000000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	37815000000	USD
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	847000000	USD
	cmcsa	Restricted Share Units Granted RestrictedShareUnitsGranted	5400000	shares
	cmcsa	Fair Value Of Stock Options Granted FairValueOfStockOptionsGranted	11.09
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	30000000	USD
	cmcsa	Mark To Market Adjustment On Derivative Component Of Prepaid Forward Sale Agreements MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements	1189000000	USD
	cmcsa	Other Investment Income Loss Net OtherInvestmentIncomeLossNet	-17000000	USD
	cmcsa	Change In Film And Television Costs ChangeInFilmAndTelevisionCosts	5590000000	USD
	cmcsa	Fair Value Of Restricted Share Units Granted FairValueOfRestrictedShareUnitsGranted	46.57
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	483000000	USD
CY2013Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	12000000	USD
CY2014Q3	cmcsa	Mark To Market Adjustment On Derivative Component Of Prepaid Forward Sale Agreements MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements	13000000	USD
CY2013Q3	cmcsa	Other Investment Income Loss Net OtherInvestmentIncomeLossNet	-6000000	USD
	cmcsa	Change In Film And Television Costs ChangeInFilmAndTelevisionCosts	7198000000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	25000000	USD
	cmcsa	Mark To Market Adjustment On Derivative Component Of Prepaid Forward Sale Agreements MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements	-19000000	USD
	cmcsa	Other Investment Income Loss Net OtherInvestmentIncomeLossNet	1000000	USD
CY2013Q3	cmcsa	Cable Segment Revenue Types As Percentage Of Total Cable Revenue CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue	1	pure
	cmcsa	Cable Segment Revenue Types As Percentage Of Total Cable Revenue CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue	1	pure
	cmcsa	Cable Segment Revenue Types As Percentage Of Total Cable Revenue CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue	1	pure
CY2013Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2622000000	shares
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	189000000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2250000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	312000000	USD
CY2014Q3	us-gaap	Interest Paid Net InterestPaidNet	656000000	USD
CY2014Q3	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	974000000	USD
	dei	Document Type DocumentType	10-Q
CY2013Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1916000000	USD
	cmcsa	Operating Income Excluding Depreciation And Amortization OperatingIncomeExcludingDepreciationAndAmortization	17046000000	USD
CY2013Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	396000000	USD
CY2013Q3	us-gaap	Costs And Expenses CostsAndExpenses	12737000000	USD
CY2014Q3	us-gaap	Revenues Revenues	16791000000	USD
CY2014Q3	us-gaap	Profit Loss ProfitLoss	2633000000	USD
CY2014Q3	cmcsa	Net Income Loss Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	41000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	11117000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	9916000000	USD
	us-gaap	Profit Loss ProfitLoss	5167000000	USD
	cmcsa	Net Income Loss Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	141000000	USD
	cmcsa	Stock Options Granted StockOptionsGranted	16400000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	37000000	shares
	cmcsa	Purchase Of Noncontrolling Common Equity Interest PurchaseOfNoncontrollingCommonEquityInterest	-1508000000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	89000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	119000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3180000000	USD
CY2014Q3	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	15000000	USD
CY2013Q3	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	345000000	USD
CY2014Q3	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	21000000	USD
CY2013Q3	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	464000000	USD
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2013Q3	cmcsa	Programming And Production Costs ProgrammingAndProductionCosts	4787000000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	1732000000	USD
CY2014Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1296000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1222000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4903000000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.49
CY2013Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.195
CY2014Q3	cmcsa	Cable Segment Revenue Types As Percentage Of Total Cable Revenue CableSegmentRevenueTypesAsPercentageOfTotalCableRevenue	1	pure
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	13000000	shares
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	146000000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	6000000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	152000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	386000000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	796000000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	134000000	USD
	cmcsa	Amortization Of Film And Television Costs AmortizationOfFilmAndTelevisionCosts	6727000000	USD
CY2014Q3	us-gaap	Impairment Of Investments ImpairmentOfInvestments	6000000	USD
CY2013Q3	cmcsa	Mark To Market Adjustment On Derivative Component Of Prepaid Forward Sale Agreements MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements	348000000	USD
CY2014Q3	cmcsa	Other Investment Income Loss Net OtherInvestmentIncomeLossNet	7000000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	247000000	USD
CY2014Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	54400000000	USD
CY2014Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	580000000	USD
CY2014Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1950000000	USD
CY2013Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1726000000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	3414000000	USD
CY2013Q3	us-gaap	Interest Expense InterestExpense	639000000	USD
CY2014Q3	cmcsa	Programming And Production Costs ProgrammingAndProductionCosts	4772000000	USD
CY2014Q3	cmcsa	Other Operating And Administrative OtherOperatingAndAdministrative	5019000000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	2592000000	USD
	us-gaap	Revenues Revenues	51043000000	USD
	us-gaap	Interest Expense InterestExpense	1953000000	USD
	us-gaap	Interest Expense InterestExpense	1928000000	USD
	cmcsa	Net Income Loss Attributable To Noncontrolling Interests And Redeemable Subsidiary Preferred Stock NetIncomeLossAttributableToNoncontrollingInterestsAndRedeemableSubsidiaryPreferredStock	264000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	6455000000	USD
	cmcsa	Film And Television Costs Net FilmAndTelevisionCostsNet	-408000000	USD
CY2014Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2580000000	shares
CY2014Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	48400000000	USD
	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-13000000	USD
	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	1197000000	USD
	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	254000000	USD
	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	549000000	USD
CY2014Q3	us-gaap	Common Stock Value CommonStockValue	30000000	USD
	us-gaap	Management Fees Revenue ManagementFeesRevenue	0	USD
	cmcsa	Net Transactions With Affiliates NetTransactionsWithAffiliates	0	USD
CY2013Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1603000000	USD
	cmcsa	Net Transactions With Affiliates NetTransactionsWithAffiliates	0	USD
CY2014Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4547000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	278000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	165000000	USD
CY2013Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	50134000000	USD
CY2013Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	18000000	shares
CY2014Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	0	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	0	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.585
CY2013Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	0	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	0	USD
CY2014Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	0	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	18000000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-47000000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	50000000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-31000000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-110000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	780000000	USD
CY2014Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	460000000	USD
	cmcsa	Change In Income Tax Expense Related To Effectively Settled Uncertain Tax Positions ChangeInIncomeTaxExpenseRelatedToEffectivelySettledUncertainTaxPositions	724000000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	54000000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	31000000	USD
	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-168000000	USD
	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	-436000000	USD
	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-15000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1701000000	USD
CY2014Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1167000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.675

Files In Submission

Name	View Source	Status
0001193125-14-379913-index-headers.html	Edgar Link	pending
0001193125-14-379913-index.html	Edgar Link	pending
0001193125-14-379913.txt	Edgar Link	pending
0001193125-14-379913-xbrl.zip	Edgar Link	pending
cmcsa-20140930.xml	Edgar Link	completed
cmcsa-20140930.xsd	Edgar Link	pending
cmcsa-20140930_cal.xml	Edgar Link	unprocessable
cmcsa-20140930_def.xml	Edgar Link	unprocessable
cmcsa-20140930_lab.xml	Edgar Link	unprocessable
cmcsa-20140930_pre.xml	Edgar Link	unprocessable
d792357d10q.htm	Edgar Link	pending
d792357dex311.htm	Edgar Link	pending
d792357dex312.htm	Edgar Link	pending
d792357dex321.htm	Edgar Link	pending
d792357dex322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
g792357g26o35.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$CMCSA
COMCAST CORP Stock $cmcsa

2014 Q3 Form 10-Q Financial Statement

#000119312514379913 Filed on October 23, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMCSA COMCAST CORP Stock $cmcsa

2014 Q3 Form 10-Q Financial Statement

#000119312514379913 Filed on October 23, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMCSA
COMCAST CORP Stock $cmcsa