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]                
Income Tax Expense (Benefit) $ 66,000,000us-gaap_IncomeTaxExpenseBenefit $ (135,000,000)us-gaap_IncomeTaxExpenseBenefit $ 469,000,000us-gaap_IncomeTaxExpenseBenefit          
Proceeds from Equity Method Investment, Dividends or Distributions     165,000,000us-gaap_EquityMethodInvestmentDividendsOrDistributions          
Live Nation                
Schedule of Equity Method Investments [Line Items]                
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
         
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
         
Equity Method Investment, Quoted Market Value 1,403,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
             
Equity Method Investment, Ownership Percentage 27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
             
shares underlying borrowed share position, unwound             8.1lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
 
SIRIUS XM                
Schedule of Equity Method Investments [Line Items]                
Purchase of shares in equity method investee       50.0lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
50.0lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
     
shares underlying borrowed share position, unwound             720.0lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
 
SIRIUS XM | Sirius XM Canada                
Schedule of Equity Method Investments [Line Items]                
Contract Term           10 years    
Sirius XM Canada                
Schedule of Equity Method Investments [Line Items]                
Equity Method Investment, Quoted Market Value 247,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
             
Equity Method Investment, Ownership Percentage 37.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
             
Charter Communications                
Schedule of Equity Method Investments [Line Items]                
Equity Method Investment, Aggregate Cost               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
           
Purchase of shares in equity method investee             26.9lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
 
Warrants acquired             1.1lmca_WarrantsAcquired
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
 
Equity Method Investment, Ownership Percentage               27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Price-per-share               $ 95.50us-gaap_SaleOfStockPricePerShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Equity method investment, cash paid for acquisition               1,200,000,000lmca_EquityMethodInvestmentCashPaidForAcquisition
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
shares underlying borrowed share position, unwound             20.3lmca_SharesUnderlyingBorrowedSharePositionUnwound
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
 
Difference between carrying amount and underlying equity             2,500,000,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
 
Loss recognized on equity method investments 72,000,000lmca_EquityMethodInvestmentLossOnInvestmentDueToWarrantAndStockOptionExercisesBelowBookBasis
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
93,000,000lmca_EquityMethodInvestmentLossOnInvestmentDueToWarrantAndStockOptionExercisesBelowBookBasis
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
           
SIRIUS XM | Sirius XM Canada                
Schedule of Equity Method Investments [Line Items]                
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
           
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
           
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
           
SIRIUS XM | SIRIUS XM                
Schedule of Equity Method Investments [Line Items]                
Income Tax Expense (Benefit)     3,000,000,000us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
         
Broadcast rights 70,000,000lmca_BroadcastRights
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
             
SIRIUS XM | Sirius XM Canada                
Schedule of Equity Method Investments [Line Items]                
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
           
Deferred revenue | SIRIUS XM                
Schedule of Equity Method Investments [Line Items]                
Investments, at fair value       21,000,000us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations
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= lmca_DeferredRevenueMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember