Annual report pursuant to Section 13 and 15(d)

Transactions with Officers and Directors (Details)

v2.4.1.9
Transactions with Officers and Directors (Details) (USD $)
1 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Annual base salary increase 5.00%lmca_AnnualBaseSalaryIncrease  
Annual target cash bonus 250.00%lmca_AnnualTargetCashBonus  
CEO    
Employment agreement term 5 years  
Officers' Compensation $ 960,750us-gaap_OfficersCompensation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Target Allocation [Abstract]    
2015   16,000,000lmca_TargetAmountAllocatedInNextTwelveMonths
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
Termination Benefits Scenario Without Cause Or Good Reason [Member] | CEO    
Severance payment multiple 1.5lmca_SeverancePaymentMultiple
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioWithoutCauseOrGoodReasonMember
 
Pro rated severance payment 11,750,000lmca_MaximumSeverancePaymentProRata
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioWithoutCauseOrGoodReasonMember
 
Fixed severance payments 17,500,000lmca_FixedSeverancePayment
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioWithoutCauseOrGoodReasonMember
 
Additional vesting added upon termination 18 months  
Termination Benefits Scenario With No Good Reason [Member] | CEO    
Pro rated severance payment 11,750,000lmca_MaximumSeverancePaymentProRata
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioWithNoGoodReasonMember
 
Termination Benefits Scenario For Death Or Disability [Member] | CEO    
Severance payment multiple 1.5lmca_SeverancePaymentMultiple
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioForDeathOrDisabilityMember
 
Pro rated severance payment 11,750,000lmca_MaximumSeverancePaymentProRata
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioForDeathOrDisabilityMember
 
Fixed severance payments 17,500,000lmca_FixedSeverancePayment
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_StatementScenarioAxis
= lmca_TerminationBenefitsScenarioForDeathOrDisabilityMember
 
Performance Options And Performance Based Restricted Stock Units [Member] | CEO    
Term of option   7 years
Target Allocation [Abstract]    
2016   17,000,000lmca_TargetAmountAllocatedInYearTwo
/ us-gaap_AwardTypeAxis
= lmca_PerformanceOptionsAndPerformanceBasedRestrictedStockUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
2017   18,000,000lmca_TargetAmountAllocatedInYearThree
/ us-gaap_AwardTypeAxis
= lmca_PerformanceOptionsAndPerformanceBasedRestrictedStockUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
2018   19,000,000lmca_TargetAmountAllocatedInYearFour
/ us-gaap_AwardTypeAxis
= lmca_PerformanceOptionsAndPerformanceBasedRestrictedStockUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
2019   $ 20,000,000lmca_TargetAmountAllocatedInYearFive
/ us-gaap_AwardTypeAxis
= lmca_PerformanceOptionsAndPerformanceBasedRestrictedStockUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
Maximum percentage of target awards issued for performace options and RSUs   50.00%lmca_MaximumPercentageOfTargetAwardsIssuedForPerformaceOptionsAndRSUs
/ us-gaap_AwardTypeAxis
= lmca_PerformanceOptionsAndPerformanceBasedRestrictedStockUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember