Condensed Consolidated Balance Sheet (USD $)	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 3,937,000,000	$ 3,910,000,000
Investments [Current]	158,000,000us-gaap_ShortTermInvestments	602,000,000us-gaap_ShortTermInvestments
Receivables, net	6,144,000,000us-gaap_AccountsReceivableNetCurrent	6,321,000,000us-gaap_AccountsReceivableNetCurrent
Programming rights	945,000,000cmcsa_ProgrammingRightsCurrent	839,000,000cmcsa_ProgrammingRightsCurrent
Other current assets	1,737,000,000us-gaap_OtherAssetsCurrent	1,859,000,000us-gaap_OtherAssetsCurrent
Total current assets	12,921,000,000us-gaap_AssetsCurrent	13,531,000,000us-gaap_AssetsCurrent
Film and television costs	5,637,000,000cmcsa_FilmAndTelevisionCosts	5,727,000,000cmcsa_FilmAndTelevisionCosts
Investments	3,235,000,000us-gaap_LongTermInvestments	3,135,000,000us-gaap_LongTermInvestments
Property and equipment, net	31,127,000,000us-gaap_PropertyPlantAndEquipmentNet	30,953,000,000us-gaap_PropertyPlantAndEquipmentNet
Franchise rights	59,364,000,000us-gaap_IndefiniteLivedFranchiseRights	59,364,000,000us-gaap_IndefiniteLivedFranchiseRights
Goodwill	27,302,000,000us-gaap_Goodwill	27,316,000,000us-gaap_Goodwill
Other intangible assets, net	16,852,000,000us-gaap_OtherIntangibleAssetsNet	16,980,000,000us-gaap_OtherIntangibleAssetsNet
Other noncurrent assets, net	2,319,000,000us-gaap_OtherAssetsNoncurrent	2,333,000,000us-gaap_OtherAssetsNoncurrent
Total assets	158,757,000,000us-gaap_Assets	159,339,000,000us-gaap_Assets
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	6,157,000,000us-gaap_AccountsPayableCurrent	5,638,000,000us-gaap_AccountsPayableCurrent
Accrued participations and residuals	1,387,000,000	1,347,000,000
Deferred revenue	970,000,000us-gaap_DeferredRevenueCurrent	915,000,000us-gaap_DeferredRevenueCurrent
Accrued expenses and other current liabilities	5,808,000,000us-gaap_AccruedLiabilitiesCurrent	5,293,000,000us-gaap_AccruedLiabilitiesCurrent
Current portion of long-term debt	4,180,000,000us-gaap_DebtCurrent	4,217,000,000us-gaap_DebtCurrent
Total current liabilities	18,502,000,000us-gaap_LiabilitiesCurrent	17,410,000,000us-gaap_LiabilitiesCurrent
Long-term debt, less current portion	42,953,000,000	44,017,000,000
Deferred income taxes	32,855,000,000	32,959,000,000
Other noncurrent liabilities	10,837,000,000us-gaap_OtherLiabilitiesNoncurrent	10,819,000,000us-gaap_OtherLiabilitiesNoncurrent
Commitments and contingencies
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	1,099,000,000	1,066,000,000
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	38,660,000,000us-gaap_AdditionalPaidInCapital	38,805,000,000us-gaap_AdditionalPaidInCapital
Retained earnings	21,186,000,000	21,539,000,000
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)	(188,000,000)	(146,000,000)
Total Comcast Corporation shareholders' equity	52,171,000,000us-gaap_StockholdersEquity	52,711,000,000us-gaap_StockholdersEquity
Noncontrolling interests	340,000,000us-gaap_MinorityInterest	357,000,000us-gaap_MinorityInterest
Total equity	52,511,000,000	53,068,000,000
Total liabilities and equity	158,757,000,000	159,339,000,000
NBCUniversal Media, LLC [Member]
Current Assets:
Cash and cash equivalents	1,036,000,000	1,248,000,000
Receivables, net	4,891,000,000	4,842,000,000
Note receivable from Comcast	135,000,000	0
Programming rights	925,000,000	825,000,000
Other current assets	805,000,000	823,000,000
Total current assets	7,792,000,000	7,738,000,000
Film and television costs	5,628,000,000	5,714,000,000
Investments	953,000,000	882,000,000
Property and equipment, net	8,209,000,000	8,138,000,000
Goodwill	14,897,000,000	14,908,000,000
Intangible assets, net	14,006,000,000	14,187,000,000
Other noncurrent assets, net	1,061,000,000	1,050,000,000
Total assets	52,546,000,000	52,617,000,000
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	1,382,000,000	1,388,000,000
Accrued participations and residuals	1,387,000,000	1,347,000,000
Program obligations	835,000,000	687,000,000
Deferred revenue	880,000,000	821,000,000
Accrued expenses and other current liabilities	1,427,000,000	1,422,000,000
Note payable to Comcast	0	865,000,000
Current portion of long-term debt	1,020,000,000	1,023,000,000
Total current liabilities	6,931,000,000	7,553,000,000
Long-term debt, less current portion	9,225,000,000	9,226,000,000
Accrued participations, residuals and program obligations	1,125,000,000	1,149,000,000
Other noncurrent liabilities	3,692,000,000	3,722,000,000
Commitments and contingencies
Redeemable noncontrolling interests	336,000,000	330,000,000
Equity:
Member's capital	31,185,000,000	30,529,000,000
Accumulated other comprehensive income (loss)	(210,000,000)	(159,000,000)
Total NBCUniversal member's equity	30,975,000,000	30,370,000,000
Noncontrolling interests	262,000,000	267,000,000
Total equity	31,237,000,000	30,637,000,000
Total liabilities and equity	52,546,000,000	52,617,000,000
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.