Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Details)

v2.4.1.9
Commitments And Contingencies (Details)
 20 Months Ended 38 Months Ended 20 Months Ended
Mar. 31, 2015
USD ($)
Jun. 25, 2012
Pending Litigation
Vivendi Universal SA Suit [Member]
EUR (€)
Mar. 31, 2015
Pending Litigation
Use And Pulic Performance Of Sounds Recorded Prior to February 15, 1972 Lawsuit
SIRIUS XM
USD ($)
lawsuit
Mar. 31, 2015
Pending Litigation
Telephone Consumer Protection Act Of 1991 Lawsuit [Member]
SIRIUS XM
USD ($)
Jan. 17, 2013
Including prejudgement interest [Member]
Pending Litigation
Vivendi Universal SA Suit [Member]
EUR (€)
Mar. 31, 2015
Minimum
Pending Litigation
Sound exchange Lawsuit [Member]
SIRIUS XM
USD ($)
Mar. 31, 2015
Maximum
Pending Litigation
Sound exchange Lawsuit [Member]
SIRIUS XM
USD ($)
Loss Contingencies [Line Items]              
Gain Contingency, Unrecorded Amount   € 765,000,000us-gaap_GainContingencyUnrecordedAmount
/ us-gaap_LitigationCaseAxis
= lmca_VivendiUniversalSaLawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		    € 945,000,000us-gaap_GainContingencyUnrecordedAmount
/ us-gaap_GainContingenciesByNatureAxis
= lmca_IncludingPrejudgementInterestMember
/ us-gaap_LitigationCaseAxis
= lmca_VivendiUniversalSaLawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		   
Number of class action lawsuits     3lmca_NumberOfClassActionLawsuitsFiled
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_UseAndPulicPerformanceOfSoundsRecordedPriorToFebruary151972LawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		       
Number of suits filed     1us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_UseAndPulicPerformanceOfSoundsRecordedPriorToFebruary151972LawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		       
Damages sought     100,000,000us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_UseAndPulicPerformanceOfSoundsRecordedPriorToFebruary151972LawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		    50,000,000us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_SoundExchangeLawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		100,000,000us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_SoundExchangeLawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Saturtory damages per violation sought       500lmca_LossContingencyStatutoryDamagesSoughtPerViolation
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_TelephoneConsumerProtectionActOf1991LawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		     
Treble damages sought per knowing violation       1,500lmca_LossContingencyTrebleDamagesSoughtForEachKnowingViolation
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
/ us-gaap_LitigationCaseAxis
= lmca_TelephoneConsumerProtectionActOf1991LawsuitMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember 		     
Compensation guarantee aggregate total 414,000,000lmca_CompensationGuaranteeAggregateTotal            
Amounts payable under guarantee in 2015 88,000,000lmca_GuaranteedEmploymentContractDueInOneYear            
Amounts payable under guarantee in 2016 77,000,000lmca_GuranteedEmploymentContractDueInTwoYears            
Amounts payable under guarantee in 2017 90,000,000lmca_GuaranteedEmploymentContractDueInThreeYears            
Amounts payable under guarantee in 2018 55,000,000lmca_GuaranteedEmploymentContractDueInFourYears            
Amount payable under guarantee, thereafter $ 104,000,000lmca_AmountsPayableUnderGuaranteeThereafter