|
Stock-Based Compensation (Details 1) (USD $)
|
12 Months Ended |
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Stock-based compensation |
$ 217,000,000us-gaap_ShareBasedCompensation
|
$ 193,000,000us-gaap_ShareBasedCompensation
|
$ 46,000,000us-gaap_ShareBasedCompensation
|
| Total unrecognized compensation cost related to unvested Liberty equity awards |
58,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
|
|
| Weighted average period of recognition related to unvested Liberty equity awards (in years) |
2 years 3 months 18 days
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |
594,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
|
|
|
| Common Class B |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Outstanding options, Ending Balance |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
|
|
|
| SIRIUS XM |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Stock-based compensation |
148,000,000us-gaap_ShareBasedCompensation
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
133,000,000us-gaap_ShareBasedCompensation
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
| Weighted average period of recognition related to unvested Liberty equity awards (in years) |
2 years 4 months 24 days
|
|
|
| Employee Stock Option [Member] | SIRIUS XM |
|
|
|
| Outstanding, aggregate intrinsic value |
246,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Options granted |
61,900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Outstanding options, Ending Balance |
268,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Exercisable options |
121,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| WAEP granted |
$ 3.39us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Outstanding WAEP, End of period |
$ 2.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Exercisable WAEP |
$ 2.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
$ 1.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |
180,000,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Total unrecognized compensation cost related to unvested Liberty equity awards |
236,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= lmca_SiriusXmMember
|
|
|
| Employee Stock Option [Member] | 2013 Plan |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum |
28.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
|
31.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum |
31.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
|
41.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
|
|
| Employee Stock Option [Member] | 2013 Plan | Common Class A |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Outstanding options, Beginning Balance |
3,656,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Options granted |
1,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
23,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
834,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
| Options exercised |
(397,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Options forfeited/cancelled |
(1,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease) |
(52,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Outstanding options, Ending Balance |
3,207,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
3,656,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
| Exercisable options |
2,698,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Outstanding WAEP, Beginning of period |
$ 30.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| WAEP granted |
$ 45.10us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| WAEP exercised |
$ 49.49us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| WAEP forfeited/cancelled |
$ 25.26us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price |
$ 23.22us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Outstanding WAEP, End of period |
$ 23.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
$ 30.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
| Exercisable WAEP |
$ 22.99us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term |
4 years 2 months 12 days
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term |
4 years 1 month 6 days
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value |
39,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value |
33,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
$ 38.86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
$ 55.16us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
$ 42.04us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
| Employee Stock Option [Member] | 2013 Plan | Common Class C |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Dividend adjustment |
6,942,000lmca_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsDividendAdjustment
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Options granted |
3,359,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Options exercised |
(428,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Options forfeited/cancelled |
(1,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease) |
(39,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Outstanding options, Ending Balance |
9,833,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Exercisable options |
5,446,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| WAEP dividend adjustment |
$ 46.01lmca_ShareBasedCompensationByShareBasedPaymentAwardOptionsDividendAdjustmentWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| WAEP granted |
$ 34.06us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| WAEP exercised |
$ 22.46us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| WAEP forfeited/cancelled |
$ 42.32us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price |
$ 22.92us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Outstanding WAEP, End of period |
$ 26.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Exercisable WAEP |
$ 22.69us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term |
5 years 2 months 12 days
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term |
4 years 1 month 6 days
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value |
82,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value |
67,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
$ 11.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
|
|
|
| Employee Stock Option [Member] | 2013 Plan | Segment, Liberty Capital [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum |
|
|
25.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= lmca_SegmentLibertyCapitalMember
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum |
|
|
54.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= lmca_SegmentLibertyCapitalMember
|
| Employee Stock Option [Member] | 2013 Plan | Option Exchange [Member] | Common Class A |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Options granted |
|
|
3,713,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_NonmonetaryTransactionTypeAxis
= lmca_OptionExchangeMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
|
|
$ 37.25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_NonmonetaryTransactionTypeAxis
= lmca_OptionExchangeMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
| Restricted Stock [Member] | 2013 Plan | Common Class A |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number |
224,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |
$ 16.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value |
$ 1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
$ 7,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
$ 10,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
| Restricted Stock [Member] | 2013 Plan | Option Exchange [Member] | Common Class A |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number |
594,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_NonrecurringAdjustmentAxis
= lmca_OptionExchangeMember
/ us-gaap_PlanNameAxis
= lmca_A2013PlanMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
|
|
|
| Minimum | 2013 Plan |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |
1 year 3 months 18 days
|
|
|
| Maximum | 2013 Plan |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |
9 years
|
|
|