Â鶹×îгöÆ·

Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Goodwill) (Details)

v2.4.1.9
Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jan. 18, 2013
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Indefinite-Lived License Agreements $ 8,600us-gaap_IndefiniteLivedLicenseAgreements $ 8,600us-gaap_IndefiniteLivedLicenseAgreements Ìý Ìý
Amortization of Intangible Assets 150us-gaap_AmortizationOfIntangibleAssets 115us-gaap_AmortizationOfIntangibleAssets 19us-gaap_AmortizationOfIntangibleAssets Ìý
Finite-Lived Intangible Assets, Gross 1,616us-gaap_FiniteLivedIntangibleAssetsGross 1,587us-gaap_FiniteLivedIntangibleAssetsGross Ìý Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (520)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (387)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Ìý Ìý
Finite-Lived Intangible Assets, Net 1,096us-gaap_FiniteLivedIntangibleAssetsNet 1,200us-gaap_FiniteLivedIntangibleAssetsNet Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Beginning Balance 14,365us-gaap_Goodwill 200us-gaap_Goodwill Ìý Ìý
Goodwill, Acquired During Period Ìý 14,165us-gaap_GoodwillAcquiredDuringPeriod Ìý Ìý
Goodwill, Other Changes 2us-gaap_GoodwillOtherChanges Ìý Ìý Ìý
Goodwill, Ending Balance 14,345us-gaap_Goodwill 14,365us-gaap_Goodwill 200us-gaap_Goodwill Ìý
SIRIUS XM Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Indefinite-Lived Trade Names 930us-gaap_IndefiniteLivedTradeNames
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember 		930us-gaap_IndefiniteLivedTradeNames
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember 		Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Acquired During Period Ìý 14,165us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember 		Ìý Ìý
Goodwill, Ending Balance 14,165us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember 		14,165us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember 		Ìý Ìý
ANLBC Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Indefinite-Lived Franchise Rights 143us-gaap_IndefiniteLivedFranchiseRights
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_AnlbcMember 		143us-gaap_IndefiniteLivedFranchiseRights
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_AnlbcMember 		Ìý Ìý
Licensing Agreements [Member] Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Finite-Lived Intangible Asset, Useful Life 15 years Ìý Ìý Ìý
Finite-Lived Intangible Assets, Gross 316us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		316us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (52)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		(22)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Net 264us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		294us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember 		Ìý Ìý
Customer Relationships [Member] Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Finite-Lived Intangible Assets, Gross 838us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		838us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (122)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		(65)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Net 716us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		773us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember 		Ìý Ìý
Other Intangible Assets [Member] Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Finite-Lived Intangible Assets, Gross 462us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		433us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (346)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		(300)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		Ìý Ìý
Finite-Lived Intangible Assets, Net 116us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		133us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember 		Ìý Ìý
Other Intangible Assets [Member] | Corporate And Other Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Beginning Balance 200us-gaap_Goodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý Ìý Ìý
Goodwill, Other Changes 2us-gaap_GoodwillOtherChanges
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý Ìý Ìý
Goodwill, Ending Balance 180us-gaap_Goodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý 200us-gaap_Goodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý
Minimum | Customer Relationships [Member] Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Finite-Lived Intangible Asset, Useful Life 10 years Ìý Ìý Ìý
Maximum | Customer Relationships [Member] Ìý Ìý Ìý Ìý
Goodwill [Line Items] Ìý Ìý Ìý Ìý
Finite-Lived Intangible Asset, Useful Life 15 years Ìý Ìý Ìý
Â鶹×îгöÆ· Broadband Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Written off Related to Sale of Business Unit (46)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_Â鶹×îгöÆ·BroadbandMember 		Ìý Ìý Ìý
Â鶹×îгöÆ· Broadband | Other Intangible Assets [Member] | Corporate And Other Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Written off Related to Sale of Business Unit (46)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_Â鶹×îгöÆ·BroadbandMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý Ìý Ìý
SIRIUS XM Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Beginning Balance Ìý Ìý Ìý 13,775us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= lmca_SiriusXmMember
Goodwill, Ending Balance Ìý Ìý Ìý 13,775us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= lmca_SiriusXmMember
TruePosition Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Acquired During Period 24us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= lmca_TruepositionMember 		Ìý Ìý Ìý
TruePosition | Other Intangible Assets [Member] | Corporate And Other Ìý Ìý Ìý Ìý
Goodwill [Roll Forward] Ìý Ìý Ìý Ìý
Goodwill, Acquired During Period $ 24us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= lmca_TruepositionMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember 		Ìý Ìý Ìý