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Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v2.4.1.9
Stock-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jul. 23, 2014
Stock-based compensation $ 44us-gaap_ShareBasedCompensation $ 49us-gaap_ShareBasedCompensation
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Common Class A
Shares received in exchange 2lmca_NumberofsharesissuedduringtheperiodforeachshareofSeriesAandSeriesBstockheldbyshareholderspriortothedistribution
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Options granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common Class C
Shares received in exchange 2lmca_NumberofsharesissuedduringtheperiodforeachshareofSeriesAandSeriesBstockheldbyshareholderspriortothedistribution
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Options granted 1,350,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Granted, WAEP $ 39.20us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Common Class C | Tranche One
Options granted 355,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
Weighted average grant-date fair value $ 11.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years
Common Class C | Tranche Two
Options granted 575,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Weighted average grant-date fair value $ 16.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Vesting percentage 50.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
CEO | Common Class C | Tranche Three
Options granted 420,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Restricted stock granted 34,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Weighted average grant-date fair value $ 12.15us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Restricted stock weighted average grant-date fair value $ 38.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year
Programming and content expense
Stock-based compensation 4us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_ProgrammingAndContentExpenseMember
4us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_ProgrammingAndContentExpenseMember
Customer service and billing
Stock-based compensation 1us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_CustomerServiceAndBillingMember
1us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_CustomerServiceAndBillingMember
Other cost of subscriber services
Stock-based compensation 2us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_OthercostofsubscriberservicesMember
2us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= lmca_OthercostofsubscriberservicesMember
Operating operating expense
Stock-based compensation 4us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_OperatingExpenseMember
4us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_OperatingExpenseMember
Selling, General and Administrative Expenses
Stock-based compensation $ 33us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 38us-gaap_ShareBasedCompensation
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember