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Quarterly report pursuant to Section 13 or 15(d)

Investments in Affiliates Accounted for Using the Equity Method (Details 2)

v2.4.1.9
Investments in Affiliates Accounted for Using the Equity Method (Details 2) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
3 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2014
May 31, 2013
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Gain (loss) on dilution of investment in affiliate $ (1,000,000)lmca_Gainlossondilutionofinvestmentinaffiliate $ (50,000,000)lmca_Gainlossondilutionofinvestmentinaffiliate Ìý
Live Nation Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Equity Method Investment, Ownership Percentage 27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
Ìý Ìý
SIRIUS XM Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Due to Related Parties, Current 5,000,000us-gaap_DueToRelatedPartiesCurrent
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
Ìý Ìý
Due to Related Parties, Noncurrent 13,000,000us-gaap_DueToRelatedPartiesNoncurrent
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
Ìý Ìý
Due from Related Parties, Current 3,000,000us-gaap_DueFromRelatedPartiesCurrent
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
Ìý Ìý
Revenue from Related Parties 14,000,000us-gaap_RevenueFromRelatedParties
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
12,000,000us-gaap_RevenueFromRelatedParties
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmMember
Ìý
Sirius XM Canada Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Equity Method Investment, Ownership Percentage 37.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
Ìý Ìý
Dividends 4,000,000us-gaap_Dividends
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
4,000,000us-gaap_Dividends
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
Ìý
Charter Communications Ìý Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý Ìý
Purchase of shares in equity method investee Ìý Ìý 26.9lmca_PurchaseOfSharesInEquityMethodInvestee
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Warrants acquired Ìý Ìý 1.1lmca_WarrantsAcquired
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Equity Method Investment, Aggregate Cost Ìý Ìý 2,600,000,000us-gaap_EquityMethodInvestmentAggregateCost
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Equity Method Investment, Ownership Percentage Ìý Ìý 27.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Price-per-share Ìý Ìý $ 95.50us-gaap_SaleOfStockPricePerShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Gain (loss) on dilution of investment in affiliate Ìý $ (46,000,000)lmca_Gainlossondilutionofinvestmentinaffiliate
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Ìý