Annual report pursuant to Section 13 and 15(d)

Transactions with Officers (Details 2)

v2.4.1.9
Transactions with Officers (Details 2) (USD $)
1 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2008
item
Dec. 31, 2009
Annual base salary increase 5.00%lmca_AnnualBaseSalaryIncrease    
Annual target cash bonus 250.00%lmca_AnnualTargetCashBonus    
Chairman      
deferred compensation installments   240lmca_DeferredCompensationInstallments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Chairman | 8% Plan [Member]      
Accrued Interest Rate per Annum compounded annually from applicable date of deferral   8.00%lmca_AccruedInterestRatePerAnnumCompoundedAnnuallyFromApplicableDateOfDeferral
/ lmca_DeferredCompensationPlansAxis
= lmca_A8PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Deferred Compensation Liability, Current and Noncurrent   2,400,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
/ lmca_DeferredCompensationPlansAxis
= lmca_A8PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Deferred Compensation Arrangement with Individual, Distributions Paid 20,000us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
/ lmca_DeferredCompensationPlansAxis
= lmca_A8PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
   
Chairman | 13% plan [Member]      
Accrued Interest Rate per Annum compounded annually from applicable date of deferral   13.00%lmca_AccruedInterestRatePerAnnumCompoundedAnnuallyFromApplicableDateOfDeferral
/ lmca_DeferredCompensationPlansAxis
= lmca_A13PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Deferred Compensation Liability, Current and Noncurrent   20,000,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
/ lmca_DeferredCompensationPlansAxis
= lmca_A13PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Deferred Compensation Arrangement with Individual, Distributions Paid 237,000us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
/ lmca_DeferredCompensationPlansAxis
= lmca_A13PlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
   
Chairman | Salary Continuation Plan [Member]      
Accrued Interest Rate per Annum compounded annually from applicable date of deferral     12.00%lmca_AccruedInterestRatePerAnnumCompoundedAnnuallyFromApplicableDateOfDeferral
/ lmca_DeferredCompensationPlansAxis
= lmca_SalaryContinuationPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
Deferred Compensation Liability, Current and Noncurrent   39,000,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
/ lmca_DeferredCompensationPlansAxis
= lmca_SalaryContinuationPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
 
Base amount per month under salary continuation plan     15,000lmca_BaseAmountPerMonthUnderSalaryContinuationPlan
/ lmca_DeferredCompensationPlansAxis
= lmca_SalaryContinuationPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember
Deferred Compensation Arrangement with Individual, Distributions Paid 164,000us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
/ lmca_DeferredCompensationPlansAxis
= lmca_SalaryContinuationPlanMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_BoardOfDirectorsChairmanMember