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Annual report pursuant to Section 13 and 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Details 1)

v2.4.1.9
Investments In Affiliates Accounted For Using The Equity Method (Details 1) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jan. 18, 2013
Mar. 31, 2013
Dec. 31, 2015
May 31, 2013
May 01, 2013
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income Tax Expense (Benefit) $ 66,000,000us-gaap_IncomeTaxExpenseBenefit $ (135,000,000)us-gaap_IncomeTaxExpenseBenefit $ 469,000,000us-gaap_IncomeTaxExpenseBenefit Ìý Ìý Ìý Ìý Ìý
Proceeds from Equity Method Investment, Dividends or Distributions Ìý Ìý 165,000,000us-gaap_EquityMethodInvestmentDividendsOrDistributions Ìý Ìý Ìý Ìý Ìý
Live Nation Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Purchase of shares in equity method investee 1.7lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		1.7lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		11.0lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		Ìý Ìý Ìý Ìý Ìý
Payments to Acquire Equity Method Investments 39,000,000us-gaap_PaymentsToAcquireEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		19,000,000us-gaap_PaymentsToAcquireEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		107,000,000us-gaap_PaymentsToAcquireEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		Ìý Ìý Ìý Ìý Ìý
Equity Method Investment, Quoted Market Value 1,403,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Equity Method Investment, Ownership Percentage 27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		Ìý Ìý Ìý Ìý Ìý Ìý Ìý
shares underlying borrowed share position, unwound Ìý Ìý Ìý Ìý Ìý Ìý 8.1lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember 		Ìý
SIRIUS XM Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Purchase of shares in equity method investee Ìý Ìý Ìý 50.0lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember 		50.0lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember 		Ìý Ìý Ìý
shares underlying borrowed share position, unwound Ìý Ìý Ìý Ìý Ìý Ìý 720.0lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember 		Ìý
SIRIUS XM | Sirius XM Canada Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Contract Term Ìý Ìý Ìý Ìý Ìý 10 years Ìý Ìý
Sirius XM Canada Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Equity Method Investment, Quoted Market Value 247,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Equity Method Investment, Ownership Percentage 37.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Charter Communications Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Equity Method Investment, Aggregate Cost Ìý Ìý Ìý Ìý Ìý Ìý Ìý 2,600,000,000us-gaap_EquityMethodInvestmentAggregateCost
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
excess amortization in share of earnings (loss) 60,000,000lmca_ExcessAmortizationInShareOfEarningsLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		51,000,000lmca_ExcessAmortizationInShareOfEarningsLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý Ìý Ìý Ìý Ìý Ìý
Purchase of shares in equity method investee Ìý Ìý Ìý Ìý Ìý Ìý 26.9lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý
Warrants acquired Ìý Ìý Ìý Ìý Ìý Ìý 1.1lmca_WarrantsAcquired
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý
Equity Method Investment, Ownership Percentage Ìý Ìý Ìý Ìý Ìý Ìý Ìý 27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Price-per-share Ìý Ìý Ìý Ìý Ìý Ìý Ìý $ 95.50us-gaap_SaleOfStockPricePerShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Equity method investment, cash paid for acquisition Ìý Ìý Ìý Ìý Ìý Ìý Ìý 1,200,000,000lmca_EquityMethodInvestmentCashPaidForAcquisition
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
shares underlying borrowed share position, unwound Ìý Ìý Ìý Ìý Ìý Ìý 20.3lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý
Difference between carrying amount and underlying equity Ìý Ìý Ìý Ìý Ìý Ìý 2,500,000,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý
Loss recognized on equity method investments 72,000,000lmca_EquityMethodInvestmentLossOnInvestmentDueToWarrantAndStockOptionExercisesBelowBookBasis
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		93,000,000lmca_EquityMethodInvestmentLossOnInvestmentDueToWarrantAndStockOptionExercisesBelowBookBasis
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember 		Ìý Ìý Ìý Ìý Ìý Ìý
SIRIUS XM | Sirius XM Canada Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
SIRIUS XM total assets 7,000,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		10,000,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý
SIRIUS XM total liabilities 18,000,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		21,000,000us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý
Revenue from Related Parties 50,000,000us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		49,000,000us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý
SIRIUS XM | SIRIUS XM Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income Tax Expense (Benefit) Ìý Ìý 3,000,000,000us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember 		Ìý Ìý Ìý Ìý Ìý
Broadcast rights 70,000,000lmca_BroadcastRights
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember 		Ìý Ìý Ìý Ìý Ìý Ìý Ìý
SIRIUS XM | Sirius XM Canada Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Proceeds from Equity Method Investment, Dividends or Distributions 43,000,000us-gaap_EquityMethodInvestmentDividendsOrDistributions
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember 		17,000,000us-gaap_EquityMethodInvestmentDividendsOrDistributions
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember 		Ìý Ìý Ìý Ìý Ìý Ìý
Deferred revenue | SIRIUS XM Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Investments, at fair value Ìý Ìý Ìý 21,000,000us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
/ us-gaap_BalanceSheetLocationAxis
= lmca_DeferredRevenueMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember 		Ìý Ìý Ìý Ìý