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