Consolidated Balance Sheet (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 3,910,000,000	$ 1,718,000,000
Investments [Current]	602,000,000us-gaap_ShortTermInvestments	3,573,000,000us-gaap_ShortTermInvestments
Receivables, net	6,321,000,000us-gaap_AccountsReceivableNetCurrent	6,376,000,000us-gaap_AccountsReceivableNetCurrent
Programming rights	839,000,000cmcsa_ProgrammingRightsCurrent	928,000,000cmcsa_ProgrammingRightsCurrent
Other current assets	1,859,000,000us-gaap_OtherAssetsCurrent	1,480,000,000us-gaap_OtherAssetsCurrent
Total current assets	13,531,000,000us-gaap_AssetsCurrent	14,075,000,000us-gaap_AssetsCurrent
Film and television costs	5,727,000,000cmcsa_FilmAndTelevisionCosts	4,994,000,000cmcsa_FilmAndTelevisionCosts
Investments	3,135,000,000us-gaap_LongTermInvestments	3,770,000,000us-gaap_LongTermInvestments
Property and equipment, net	30,953,000,000us-gaap_PropertyPlantAndEquipmentNet	29,840,000,000us-gaap_PropertyPlantAndEquipmentNet
Franchise rights	59,364,000,000us-gaap_IndefiniteLivedFranchiseRights	59,364,000,000us-gaap_IndefiniteLivedFranchiseRights
Goodwill	27,316,000,000us-gaap_Goodwill	27,098,000,000us-gaap_Goodwill
Other intangible assets, net	16,980,000,000us-gaap_OtherIntangibleAssetsNet	17,329,000,000us-gaap_OtherIntangibleAssetsNet
Other noncurrent assets, net	2,333,000,000us-gaap_OtherAssetsNoncurrent	2,343,000,000us-gaap_OtherAssetsNoncurrent
Total assets	159,339,000,000us-gaap_Assets	158,813,000,000us-gaap_Assets
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	5,638,000,000us-gaap_AccountsPayableCurrent	5,528,000,000us-gaap_AccountsPayableCurrent
Accrued participations and residuals	1,347,000,000	1,239,000,000
Deferred revenue	915,000,000us-gaap_DeferredRevenueCurrent	898,000,000us-gaap_DeferredRevenueCurrent
Accrued expenses and other current liabilities	5,293,000,000us-gaap_AccruedLiabilitiesCurrent	7,967,000,000us-gaap_AccruedLiabilitiesCurrent
Current portion of long-term debt	4,217,000,000us-gaap_DebtCurrent	3,280,000,000us-gaap_DebtCurrent
Total current liabilities	17,410,000,000us-gaap_LiabilitiesCurrent	18,912,000,000us-gaap_LiabilitiesCurrent
Long-term debt, less current portion	44,017,000,000	44,567,000,000
Deferred income taxes	32,959,000,000	31,935,000,000
Other noncurrent liabilities	10,819,000,000us-gaap_OtherLiabilitiesNoncurrent	11,384,000,000us-gaap_OtherLiabilitiesNoncurrent
Commitments and contingencies
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	1,066,000,000	957,000,000
Equity:
Preferred stock - authorized, 20,000,000 shares; issued, zero	0us-gaap_PreferredStockValue	0us-gaap_PreferredStockValue
Common stock	30,000,000us-gaap_CommonStockValue	30,000,000us-gaap_CommonStockValue
Additional paid-in capital	38,805,000,000us-gaap_AdditionalPaidInCapital	38,890,000,000us-gaap_AdditionalPaidInCapital
Retained earnings	21,539,000,000	19,235,000,000
Treasury stock, 365,460,750 Class A common shares and 70,934,764 Class A Special common shares	(7,517,000,000)us-gaap_TreasuryStockValue	(7,517,000,000)us-gaap_TreasuryStockValue
Accumulated other comprehensive income (loss)	(146,000,000)	56,000,000
Total Comcast Corporation shareholders' equity	52,711,000,000us-gaap_StockholdersEquity	50,694,000,000us-gaap_StockholdersEquity
Noncontrolling interests	357,000,000us-gaap_MinorityInterest	364,000,000us-gaap_MinorityInterest
Total equity	53,068,000,000	51,058,000,000
Total liabilities and equity	159,339,000,000	158,813,000,000
NBCUniversal Media, LLC [Member]
Current Assets:
Cash and cash equivalents	1,248,000,000	967,000,000
Receivables, net	4,842,000,000	4,911,000,000
Programming rights	825,000,000	903,000,000
Other current assets	823,000,000	615,000,000
Total current assets	7,738,000,000	7,396,000,000
Film and television costs	5,714,000,000	4,983,000,000
Investments	882,000,000	884,000,000
Property and equipment, net	8,138,000,000	7,650,000,000
Goodwill	14,908,000,000	14,882,000,000
Intangible assets, net	14,187,000,000	14,857,000,000
Other noncurrent assets, net	1,050,000,000	1,087,000,000
Total assets	52,617,000,000	51,739,000,000
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	1,388,000,000	1,583,000,000
Accrued participations and residuals	1,347,000,000	1,239,000,000
Program obligations	687,000,000	657,000,000
Deferred revenue	821,000,000	846,000,000
Accrued expenses and other current liabilities	1,422,000,000	1,465,000,000
Note payable to Comcast	865,000,000	799,000,000
Current portion of long-term debt	1,023,000,000	906,000,000
Total current liabilities	7,553,000,000	7,495,000,000
Long-term debt, less current portion	9,226,000,000	10,259,000,000
Accrued participations residuals and program obligations	1,149,000,000	1,015,000,000
Other noncurrent liabilities	3,722,000,000	3,412,000,000
Commitments and contingencies
Redeemable noncontrolling interests	330,000,000	231,000,000
Equity:
Member's capital	30,529,000,000	29,056,000,000
Accumulated other comprehensive income (loss)	(159,000,000)	(16,000,000)
Total NBCUniversal member's equity	30,370,000,000	29,040,000,000
Noncontrolling interests	267,000,000	287,000,000
Total equity	30,637,000,000	29,327,000,000
Total liabilities and equity	52,617,000,000	51,739,000,000
Class A Common Stock [Member]
Equity:
Common stock	25,000,000	25,000,000
Class B Common Stock [Member]
Equity:
Common stock	0	0
Class A Special Common Stock [Member]
Equity:
Common stock	$ 5,000,000	$ 5,000,000

The total amount of participations, residual and royalty expenses due to another party in less than one year. Royalty expenses are due to content creators, including artists, authors and other talent; participations includes amounts to financial participants in films, including actors, directors, and producers, for contractually defined participations in a film's net profit or gross receipts; residuals include amounts due to unions and guilds.

No definition available.