v2.4.1.9
Condensed Consolidated Statement of Cash Flows (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating Activities    
Net cash provided by operating activities $ 5,245,000,000us-gaap_NetCashProvidedByUsedInOperatingActivities $ 4,486,000,000us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing Activities    
Capital expenditures (1,726,000,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (1,448,000,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Cash paid for intangible assets (273,000,000)us-gaap_PaymentsToAcquireIntangibleAssets (217,000,000)us-gaap_PaymentsToAcquireIntangibleAssets
Acquisitions and construction of real estate properties (24,000,000)cmcsa_PaymentsForAcquisitionsAndConstructionOfRealEstateProperties 0cmcsa_PaymentsForAcquisitionsAndConstructionOfRealEstateProperties
Proceeds from sales of businesses and investments 180,000,000cmcsa_ProceedsFromSalesOfBusinessesAndInvestments 300,000,000cmcsa_ProceedsFromSalesOfBusinessesAndInvestments
Purchases of investments (32,000,000)us-gaap_PaymentsToAcquireInvestments (37,000,000)us-gaap_PaymentsToAcquireInvestments
Other 181,000,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities (103,000,000)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net cash provided by (used in) investing activities (1,694,000,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (1,505,000,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing Activities    
Proceeds from (repayments of) short-term borrowings, net (150,000,000)us-gaap_ProceedsFromRepaymentsOfShortTermDebt (364,000,000)us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Proceeds from borrowings 0us-gaap_ProceedsFromOtherDebt 2,187,000,000us-gaap_ProceedsFromOtherDebt
Repurchases and repayments of debt (909,000,000)us-gaap_RepaymentsOfOtherDebt (2,260,000,000)us-gaap_RepaymentsOfOtherDebt
Repurchases and retirements of common stock (2,000,000,000)us-gaap_PaymentsForRepurchaseOfCommonStock (750,000,000)us-gaap_PaymentsForRepurchaseOfCommonStock
Dividends paid (572,000,000)us-gaap_PaymentsOfDividends (508,000,000)us-gaap_PaymentsOfDividends
Issuances of common stock 28,000,000us-gaap_ProceedsFromIssuanceOfCommonStock 20,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock (62,000,000)cmcsa_DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock (66,000,000)cmcsa_DistributionsToNoncontrollingInterestsAndDividendsForRedeemableSubsidiaryPreferredStock
Other 141,000,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities 96,000,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash provided by (used in) financing activities (3,524,000,000)us-gaap_NetCashProvidedByUsedInFinancingActivities (1,645,000,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
Increase (decrease) in cash and cash equivalents 27,000,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 1,336,000,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 3,910,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue 1,718,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 3,937,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue 3,054,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
NBCUniversal Media, LLC [Member]    
Operating Activities    
Net cash provided by operating activities 1,202,000,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
756,000,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Investing Activities    
Capital expenditures (268,000,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(291,000,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Cash paid for intangible assets (37,000,000)us-gaap_PaymentsToAcquireIntangibleAssets
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(32,000,000)us-gaap_PaymentsToAcquireIntangibleAssets
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Note receivable from Comcast (135,000,000)cmcsa_NoteReceivableIssuedFromParent
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
0cmcsa_NoteReceivableIssuedFromParent
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Other 169,000,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(160,000,000)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Net cash provided by (used in) investing activities (271,000,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(483,000,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Financing Activities    
Proceeds from (repayments of) borrowings from Comcast, net (896,000,000)cmcsa_ProceedsFromNoteReceivableIssuedToAndBorrowingsFromComcast
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
139,000,000cmcsa_ProceedsFromNoteReceivableIssuedToAndBorrowingsFromComcast
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Repurchases and repayments of debt (1,000,000)us-gaap_RepaymentsOfOtherDebt
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(1,000,000)us-gaap_RepaymentsOfOtherDebt
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Distributions to noncontrolling interests (51,000,000)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(54,000,000)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Distributions to member (195,000,000)us-gaap_PaymentsOfCapitalDistribution
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(195,000,000)us-gaap_PaymentsOfCapitalDistribution
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Other 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(4,000,000)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Net cash provided by (used in) financing activities (1,143,000,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
(115,000,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Increase (decrease) in cash and cash equivalents (212,000,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
158,000,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Cash and cash equivalents, beginning of period 1,248,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
967,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
Cash and cash equivalents, end of period $ 1,036,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember
$ 1,125,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= cmcsa_NBCUniversalMediaLLCMember