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Quarterly report pursuant to Section 13 or 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 $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule of Equity Method Investments [Line Items] Ìý Ìý
Share of earnings (losses) of affiliates, net $ (37)us-gaap_IncomeLossFromEquityMethodInvestments $ (35)us-gaap_IncomeLossFromEquityMethodInvestments
Excess basis amortization in share of earnings (loss) 19lmca_ExcessBasisAmortizationInShareOfEarningsLoss Ìý
Live Nation Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý
Share of earnings (losses) of affiliates, net (18)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
(14)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_LiveNationMember
Sirius XM Canada Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý
Share of earnings (losses) of affiliates, net (7)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
1us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_SiriusXmCanadaMember
Charter Communications Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý
Share of earnings (losses) of affiliates, net Ìý (28)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_CharterCommunicationsMember
Equity method investment, other Ìý Ìý
Schedule of Equity Method Investments [Line Items] Ìý Ìý
Share of earnings (losses) of affiliates, net $ (12)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_EquityMethodInvestmentOtherMember
$ 6us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= lmca_EquityMethodInvestmentOtherMember