LSXMA


Line plots across dimensions of each concept
Tables

Table of contents


lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:PreferredStockParOrStatedValuePerShare
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued

us-gaap:PreferredStockSharesAuthorized
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding
lmca:EconomicPerformanceGroup
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
lmca:EconomicPerformanceGroup
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
lmca:EconomicPerformanceGroup
us-gaap:EarningsPerShareBasic
lmca:EconomicPerformanceGroup
us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:ProductOrService
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
lmca:EconomicPerformanceGroup, us-gaap:ProductOrService
us-gaap:ProductOrService

us-gaap:Revenues

us-gaap:GainLossOnInvestments
lmca:EconomicPerformanceGroup
us-gaap:FinancialInstrument
lmca:EconomicPerformanceGroup, us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization
us-gaap:ProductOrService

us-gaap:CostsAndExpenses
lmca:EconomicPerformanceGroup

us-gaap:SellingGeneralAndAdministrativeExpense
lmca:EconomicPerformanceGroup

us-gaap:LitigationSettlementExpense

us-gaap:OperatingIncomeLoss
lmca:EconomicPerformanceGroup

us-gaap:InterestExpense
lmca:EconomicPerformanceGroup

us-gaap:OtherNonoperatingIncomeExpense
lmca:EconomicPerformanceGroup

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
lmca:EconomicPerformanceGroup

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:NonoperatingIncomeExpense
lmca:EconomicPerformanceGroup

us-gaap:IncomeTaxExpenseBenefit
lmca:EconomicPerformanceGroup

us-gaap:ProfitLoss
lmca:EconomicPerformanceGroup
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss
lmca:EconomicPerformanceGroup

us-gaap:ComprehensiveIncomeNetOfTax
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
lmca:EconomicPerformanceGroup
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
lmca:EconomicPerformanceGroup

us-gaap:Assets
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems

us-gaap:Liabilities
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:LiabilitiesAndStockholdersEquity
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:StockholdersEquity
lmca:EconomicPerformanceGroup

us-gaap:AssetsCurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity, lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup

us-gaap:ReceivablesNetCurrent
lmca:EconomicPerformanceGroup

us-gaap:OtherAssetsCurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:PropertyPlantAndEquipmentGross
lmca:EconomicPerformanceGroup

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
lmca:EconomicPerformanceGroup

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
lmca:EconomicPerformanceGroup

us-gaap:Goodwill
dei:LegalEntity, us-gaap:BusinessAcquisition
lmca:EconomicPerformanceGroup
us-gaap:ReportingUnit

us-gaap:FiniteLivedIntangibleAssetsNet
lmca:EconomicPerformanceGroup
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherAssetsNoncurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:LiabilitiesCurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:DebtCurrent
lmca:EconomicPerformanceGroup

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
lmca:EconomicPerformanceGroup

us-gaap:OtherLiabilitiesCurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

us-gaap:ContractWithCustomerLiabilityCurrent
lmca:EconomicPerformanceGroup
us-gaap:StatementBusinessSegments

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
lmca:EconomicPerformanceGroup

us-gaap:MinorityInterest
lmca:EconomicPerformanceGroup

us-gaap:OtherLiabilitiesNoncurrent
lmca:EconomicPerformanceGroup

us-gaap:StockholdersEquity
lmca:EconomicPerformanceGroup

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest
lmca:EconomicPerformanceGroup

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities
lmca:EconomicPerformanceGroup

us-gaap:NetCashProvidedByUsedInInvestingActivities
lmca:EconomicPerformanceGroup

us-gaap:NetCashProvidedByUsedInFinancingActivities
lmca:EconomicPerformanceGroup

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
lmca:EconomicPerformanceGroup

us-gaap:NetCashProvidedByUsedInOperatingActivities
lmca:EconomicPerformanceGroup

us-gaap:NetIncomeLoss
lmca:EconomicPerformanceGroup

us-gaap:ProfitLoss
lmca:EconomicPerformanceGroup
us-gaap:StatementEquityComponents

us-gaap:DeferredIncomeTaxExpenseBenefit
lmca:EconomicPerformanceGroup

us-gaap:ShareBasedCompensation
dei:LegalEntity
lmca:EconomicPerformanceGroup

us-gaap:NetCashProvidedByUsedInInvestingActivities
lmca:EconomicPerformanceGroup

us-gaap:PaymentsToAcquireInvestments
lmca:EconomicPerformanceGroup

us-gaap:NetCashProvidedByUsedInFinancingActivities
lmca:EconomicPerformanceGroup

us-gaap:ProceedsFromIssuanceOfLongTermDebt
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument

us-gaap:RepaymentsOfLongTermDebt
lmca:EconomicPerformanceGroup

us-gaap:PaymentsForRepurchaseOfCommonStock
lmca:EconomicPerformanceGroup
dei:LegalEntity
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
dei:LegalEntity
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
dei:LegalEntity, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
lmca:EconomicPerformanceGroup

lmca:AcquisitionAndRestructuringCosts
lmca:EconomicPerformanceGroup

lmca:AdjustedOibda
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
lmca:DebtInstrumentUnusedBorrowingCapacityFeePercent
lmca:EconomicPerformanceGroup, us-gaap:OptionIndexedToIssuersEquityType, us-gaap:StatementClassOfStock
lmca:ForwardContractNumberOfUnderlyingShares
lmca:EconomicPerformanceGroup
lmca:IntergroupInterestExpenseIncome
lmca:EconomicPerformanceGroup
lmca:IntergroupTaxAllocation

lmca:OperatingCostsAndExpensesNet
lmca:EconomicPerformanceGroup

lmca:OtherComprehensiveIncomeLossCreditRiskOnFairValueDebtInstrumentsGainLossNetOfTax

lmca:PaymentTaxWithholdingShareBasedPaymentArrangementNet
lmca:EconomicPerformanceGroup
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction
lmca:RelatedPartyTransactionPaymentsReceivablePercentOfGrossRevenue

lmca:ReturnOfInvestmentInEquityMethodAffiliates
lmca:EconomicPerformanceGroup

lmca:ShareOfOtherComprehensiveEarningsLossOfEquityAffiliates

lmca:SubscriberAcquisitionCosts
lmca:EconomicPerformanceGroup

lmca:SubsidiarySharesRepurchasedBySubsidiary
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup
lmca:UnrealizedGainLossOnIntergroupInterest
lmca:EconomicPerformanceGroup
lmca:UnrealizedGainsLossesOnIntergroupInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary
us-gaap:StatementEquityComponents
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:DebtInstrumentRedemptionPricePercentage

us-gaap:DepreciationAndAmortization
lmca:EconomicPerformanceGroup

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
lmca:EconomicPerformanceGroup

us-gaap:IncomeLossFromEquityMethodInvestments
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
lmca:EconomicPerformanceGroup

us-gaap:IncreaseDecreaseInOperatingAssets
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:FinancialInstrument
us-gaap:OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherNoncashIncomeExpense
lmca:EconomicPerformanceGroup

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
lmca:EconomicPerformanceGroup

us-gaap:PaymentsOfDividendsMinorityInterest
lmca:EconomicPerformanceGroup
dei:LegalEntity, us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireProductiveAssets
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
lmca:EconomicPerformanceGroup

us-gaap:ProceedsFromSaleOfProductiveAssets
lmca:EconomicPerformanceGroup
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction
dei:LegalEntity, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
dei:LegalEntity
us-gaap:RestructuringCharges
dei:LegalEntity, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
lmca:EconomicPerformanceGroup, us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock
lmca:EconomicPerformanceGroup, us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

lmca:DeferredTaxLiabilitiesAssetsNoncurrent
lmca:EconomicPerformanceGroup
us-gaap:ConsolidationItems

lmca:IndefiniteLivedIntangibleAssetsTotal
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup
lmca:IntergroupInterests
us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup
lmca:IntergroupPayableReceivable
lmca:EconomicPerformanceGroup
lmca:ReattributionAssets
lmca:EconomicPerformanceGroup
lmca:RedeemableIntergroupInterest
us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
lmca:SecuritiesBasketConversionRatioFromSharesOfLibertyMediaCorporationCommonStock
us-gaap:OptionIndexedToIssuersEquityType, us-gaap:StatementClassOfStock
lmca:SecuritiesBasketPricePerShare
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument, us-gaap:StatementClassOfStock
us-gaap:ClassOfWarrantOrRightOutstanding
lmca:EconomicPerformanceGroup, us-gaap:OptionIndexedToIssuersEquityType, us-gaap:StatementClassOfStock
lmca:EconomicPerformanceGroup
us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

us-gaap:DebtInstrumentCarryingAmount
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByMeasurementFrequency
dei:LegalEntity, us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateEffectivePercentage
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
dei:LegalEntity, us-gaap:DebtInstrument
us-gaap:DebtWeightedAverageInterestRate
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
lmca:EconomicPerformanceGroup
us-gaap:DeferredFinanceCostsNet

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
dei:LegalEntity
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments
lmca:EconomicPerformanceGroup
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems
lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DebtInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DebtInstrument

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedLicenseAgreements
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:InvestmentOwnedBalanceShares
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:OptionIndexedToIssuersEquityType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCredit
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:DebtInstrument
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:DebtInstrument

us-gaap:LongTermDebtFairValue
lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherAssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherIndefiniteLivedIntangibleAssets
lmca:EconomicPerformanceGroup
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherLiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashEquivalentsCurrent
us-gaap:StatementBusinessSegments
us-gaap:RevenueRemainingPerformanceObligation
lmca:EconomicPerformanceGroup, us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
dei:LegalEntity
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
dei:LegalEntity
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
dei:LegalEntity
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock
dei:LegalEntity
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

Tables

  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
 us-gaap:CommonStockValue lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassC██████████████▁2.02.02.02.02.02.02.02.02.02.02.02.02.02.01.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PreferredStockParOrStatedValuePerShare ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄1e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-08NANANA0.0NANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassA███▄▃▃▂▂▂▂▂▂▂▂▁▁▁10.31267510.31267510.31263910.26857810.25567810.24850610.24459110.24404210.24344810.24344810.24325910.24325910.23834610.23816110.23118510.2313810.229806NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassB▁▁▁▁▁▁▁▁▁▁▁▁█████0.9818240.9818240.981860.981860.981860.981860.981860.981860.981860.981860.981860.981860.9867910.9867910.9867910.9868280.986828NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassC███▇▇▇▇▇▇▇▇▁▁▁▁▁▁39.92976139.92949139.89478439.80345239.7841839.76817439.74021539.73860239.73470439.73470139.7234438.24200438.24192738.23829338.21527638.21562238.19898NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassA███▅▄▃▃▃▃▃▃▃▂▁▁25.83442625.83442625.83433425.71446425.69192225.67534625.67534625.67341925.65628625.65245725.64961125.64961125.63639125.60804525.593352NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassB▁▁▁▁▁▃▃▃▃▃▃▃███2.4481412.4481412.4482332.4490062.4491852.4534852.4534852.4539212.4541262.4544482.4544482.4544482.4667782.4667782.466778NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassC████████████▇▇▁203.442287203.43906203.366419203.046842202.99597202.984567202.887872202.87821202.794169202.790466202.720588201.48371186.90216173.88891355.737179NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassA▁▁█▇▆▆▆▆▆▆▆▆▅▅▅▄▄101.421424101.421424103.339016102.943929102.887744102.866343102.809736102.802886102.784629102.726319102.701972102.692636102.566924102.504517102.390088102.340884102.319578NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassB▁▁▁▁▂▂▂▂▂▂▂▂█████9.8082329.8082329.8086019.8107779.8147779.8215319.8215319.8215319.8215319.8215319.8215319.8215319.8708569.8708569.8708569.8709669.870956NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassC█▁▁▁▂▂▄▄▅▆▆▆▆▆▆▆▆232.276212202.408714203.324574203.86282205.466815207.632108213.130922215.604989218.816674222.965783223.588953223.556819223.392219223.273754222.936204222.786593222.75655NANANANANANANANANANANANANANANANANANANANANA
us-gaap:PreferredStockSharesAuthorized ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄50.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.050.0NANANA0.0NANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassA███▄▃▃▂▂▂▂▂▂▂▂▁▁▁10.31267510.31267510.31263910.26857810.25567810.24850610.24459110.24404210.24344810.24344810.24325910.24325910.23834610.23816110.23118510.2313810.229806NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassB▁▁▁▁▁▁▁▁▁▁▁▁█████0.9818240.9818240.981860.981860.981860.981860.981860.981860.981860.981860.981860.981860.9867910.9867910.9867910.9868280.986828NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassC███▇▇▇▇▇▇▇▇▁▁▁▁▁▁39.92976139.92949139.89478439.80345239.7841839.76817439.74021539.73860239.73470439.73470139.7234438.24200438.24192738.23829338.21527638.21562238.19898NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassA███▅▄▃▃▃▃▃▃▃▂▁▁25.83442625.83442625.83433425.71446425.69192225.67534625.67534625.67341925.65628625.65245725.64961125.64961125.63639125.60804525.593352NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassB▁▁▁▁▁▃▃▃▃▃▃▃███2.4481412.4481412.4482332.4490062.4491852.4534852.4534852.4539212.4541262.4544482.4544482.4544482.4667782.4667782.466778NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassC████████████▇▇▁203.442287203.43906203.366419203.046842202.99597202.984567202.887872202.87821202.794169202.790466202.720588201.48371186.90216173.88891355.737179NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassA▁▁█▇▆▆▆▆▆▆▆▆▅▅▅▄▄101.421424101.421424103.339016102.943929102.887744102.866343102.809736102.802886102.784629102.726319102.701972102.692636102.566924102.504517102.390088102.340884102.319578NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassB▁▁▁▁▂▂▂▂▂▂▂▂█████9.8082329.8082329.8086019.8107779.8147779.8215319.8215319.8215319.8215319.8215319.8215319.8215319.8708569.8708569.8708569.8709569.870956NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,us-gaap:CommonClassC█▁▁▁▂▂▄▄▅▆▆▆▆▆▆▆▆232.276212202.408714203.324574203.86282205.466815207.632108213.130922215.604989218.816674222.965783223.588953223.556819223.392219223.273754222.936204222.786593222.75655NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▁█60.061.0NA61.061.061.0NA61.060.060.0NA59.059.059.0NA59.045.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup█▁237.0233.0NA233.0233.0233.0NA232.0232.0233.0NA218.0214.0179.0NA85.084.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup█▁329.0319.0NA321.0323.0327.0NA335.0337.0340.0NA340.0339.0339.0NA337.0337.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▄▄51.051.0NA51.051.051.0NA51.051.051.0NA49.049.049.0NA49.036.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▄▄232.0232.0NA231.0231.0231.0NA231.0231.0231.0NA216.0207.0173.0NA84.083.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup█▁328.0315.0NA317.0319.0323.0NA330.0333.0336.0NA336.0335.0335.0NA335.0335.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,lmca:CommonClassAandC3.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyBravesGroup,us-gaap:CommonClassANA3.0NA2.02.02.0NANANANANA2.02.02.0NANA2.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,lmca:CommonClassAandC12.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassANA6.0NA5.05.010.0NANANANANA5.05.08.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertySiriusXmGroup,lmca:CommonClassAandC█▁25.022.0NA22.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▆▇██▆▆▆▆▄▆▆▆▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▁▁▁▁▃▁▁▃1909.02013.02619.02856.02805.02012.02009.02315.02199.01517.01994.02065.02140.01395.01321.01385.01366.01204.01208.01284.01222.01081.01095.01184.01160.01011.01025.01110.01078.0789.0467.0555.0537.0440.0973.0540.0538.0973.0
us-gaap:Revenues ▅▆▇██▆▆▆▆▄▆▆▆▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▁▁▁▁▃▁▁▃1909.02013.02619.02856.02805.02012.02009.02315.02199.01517.01994.02065.02140.01395.01321.01385.01366.01204.01208.01284.01222.01081.01095.01184.01160.01011.01025.01110.01078.0789.0467.0555.0537.0440.0973.0540.0538.0973.0
us-gaap:GainLossOnInvestments ▁▅▂▅▃▃▂▄▆█▄▅▄▅-180.01.0-144.014.0-87.0-98.0-140.0-31.058.0153.0-45.018.0-49.0-12.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▆▁█▅▅▅▅▇-1.0-9.02.0-2.0-2.0-2.0-3.01.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▅▅▁▆▁▁▂▅▄█▆▃▃▄5.015.0-99.026.0-100.0-97.0-67.019.0-4.095.033.0-44.0-49.0-12.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▆▅▆▇▆▄▅██▄█-184.0-5.0-47.0-10.015.01.0-70.0-51.062.058.0-78.062.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments us-gaap:FinancialInstrument lmca:BondHedgeChangeInFairValue█▁73.0-323.0NA68.0-12.051.0NA-41.097.020.0NA6.046.078.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments us-gaap:FinancialInstrument lmca:DebtMeasuredAtFairValue▁█▁▃▃▂▅▄▂▄▄▃▃▂-262.0544.0-289.0-62.0-71.0-162.0207.026.0-133.030.0110.0-42.0-78.0-116.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments us-gaap:FinancialInstrument lmca:FairValueOptionSecurities▆▁▆▆▇▆▁▅██▂▇▅▆22.0-135.021.018.040.031.0-131.0-25.084.074.0-112.056.0-10.030.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainLossOnInvestments us-gaap:FinancialInstrument lmca:OtherFinancialInstruments▅▁▇▆▄▅▃▇▇█▇▆▆▆-13.0-85.016.0-10.0-44.0-18.0-46.09.010.029.015.0-2.0-7.0-4.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup,us-gaap:ProductOrService lmca:LibertyFormulaOneGroup,lmca:Formula▁▁▇██▃▆█▇16.043.0371.0434.0441.0148.0328.0450.0414.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup,us-gaap:ProductOrService lmca:LibertySiriusXmGroup,lmca:CustomerServiceAndBilling█▇█▇▇▆▂▁▁122.0118.0123.0120.0119.0113.098.095.095.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup,us-gaap:ProductOrService lmca:LibertySiriusXmGroup,lmca:OtherCostOfSubscriberServices▅▄█▆▅▂▂▁▂47.044.063.052.047.037.034.030.033.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup,us-gaap:ProductOrService lmca:LibertySiriusXmGroup,lmca:ProgrammingAndContentExpense▄▆█▆▆▃▃▁▃110.0118.0124.0116.0116.0106.0103.097.0105.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup,us-gaap:ProductOrService lmca:LibertySiriusXmGroup,lmca:RevenueShareAndRoyalties▇▇███▅▁▁▃587.0570.0607.0592.0600.0492.0337.0343.0404.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService lmca:CustomerServiceAndBilling█▇█▇▇▆▂▁▁122.0118.0123.0120.0119.0113.098.095.095.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService lmca:Formula▁▁▇██▃▆█▇16.043.0371.0434.0441.0148.0328.0450.0414.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService lmca:OtherCostOfSubscriberServices▅▄█▆▅▂▂▁▂47.044.063.052.047.037.034.030.033.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService lmca:ProgrammingAndContentExpense▄▆█▆▆▃▃▁▃110.0118.0124.0116.0116.0106.0103.097.0105.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService lmca:RevenueShareAndRoyalties▇▇███▅▁▁▃587.0570.0607.0592.0600.0492.0337.0343.0404.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▆▆███▆▆▆▆▅▆▆▆▄▄▄▄▂▄▄▄▃▄▄▄▃▃▃▃▃▅▁▁▁1695.01767.02317.02349.02344.01812.01630.01784.01825.01290.01663.01683.01718.01136.01048.01033.01038.0423.0991.0963.01051.0836.0889.0935.0929.0856.0836.0862.0842.0629.01329.0144.0133.067.0NANANANA
us-gaap:SellingGeneralAndAdministrativeExpense ▆▆█▇▇▆▅▅▅▄▅▅▅▄▄▄▃▃▄▃▃▃▄▃▄▄▄▃▃▃▅▁▁▁390.0408.0534.0440.0436.0402.0340.0295.0303.0265.0311.0324.0288.0239.0242.0235.0208.0201.0253.0207.0199.0202.0233.0209.0215.0216.0216.0207.0185.0154.0303.037.041.033.0NANANANA
us-gaap:LitigationSettlementExpense ▂▁▂▂▂▄▂▂█0.0-16.00.00.00.025.00.00.069.0NANANANANANANANANA0.00.0108.0NANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▃▃▄▅▅▃▄▆▄▃▄▄▅▃▃▄▄█▃▄▂▃▃▃▃▂▃▃▃▂▁▂▂▂▃▂▂▅214.0246.0302.0507.0461.0200.0379.0531.0374.0227.0331.0382.0422.0259.0273.0352.0328.0781.0217.0321.0171.0245.0206.0249.0231.0155.0189.0248.0236.0160.025.0111.0101.089.0293.0111.094.0459.0
us-gaap:InterestExpense ██████▇▇▇▇▇█▇▇▅▅▅▄▄▄▄▄▄▄▄▃▃▃▂▁▂▁▁▁163.0164.0162.0169.0167.0159.0153.0150.0153.0150.0143.0159.0149.0140.090.098.090.084.084.084.083.077.070.070.062.053.054.039.028.011.027.01.02.03.0NANANANA
us-gaap:OtherNonoperatingIncomeExpense ▆▆▇▂▆▆█▆▆▅▅▄▅▆▄▅▅▅▄▅▅▅▅▄▅▃▃▁▅▅▄█▆▅14.017.027.0-47.021.08.041.010.021.06.06.0-11.0-4.017.0-21.05.05.07.0-13.04.06.02.0-8.0-13.0-2.0-38.0-42.0-67.0-1.0-5.0-18.049.08.02.0NANANANA
us-gaap:AllocatedShareBasedCompensationExpense ▁▆███▆▁▁▃▁45.067.074.076.076.065.047.046.053.046.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▁▁▂▁▁▁▂▂▁▁▂▁▁▁▂▁▂▁▁▁▁▁▁▁▁▂▁▁█▂▁▂▁-308.038.0-40.0360.0262.0-69.073.0418.0322.0228.086.0385.0236.0120.0203.0303.0229.0684.0149.070.0134.0105.0165.0150.0181.0-35.0654.0210.0262.07749.0413.0250.01237.0112.0NANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▂▇▇▁▇▇▆▂▃█▅▃▃▄▇▃▅▇▅▄-47.038.0-60.019.031.0-82.021.029.04.0-58.0-43.041.0-5.0-55.0-42.0-21.025.0-41.0-18.017.0-5.0-24.0NANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▂▁▂▅▃▂▂▅▄▃▃▄▄▃▄▄▄█-227.0-368.0-192.070.0-87.0-192.0-210.076.011.0-77.0-82.0-46.0-54.0-122.046.047.0-55.0462.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁█▅▆▇▅▆▇▇█▅█▆▆▅▆▆▆▅▆▄▅-34.0368.0212.0271.0318.0205.0262.0313.0307.0363.0211.0390.0295.0297.0199.0277.0259.0263.0185.0249.0121.0210.0NANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▁▁▁▂▁▁▁▂▂▁▁▂▁▁▁▂▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-308.038.0-40.0360.0262.0-69.073.0418.0322.0228.086.0385.0236.0120.0203.0303.0229.0684.0149.070.0134.0105.0165.0150.0181.0-35.0856.00.0262.07749.012.00.01237.0112.0NANANANA
us-gaap:NonoperatingIncomeExpense ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁█▂▂▃▂-522.0-208.0-342.0-147.0-199.0-269.0-306.0-113.0-52.01.0-245.03.0-186.0-139.0-70.0-49.0-99.0-97.0-68.0-251.0-37.0-140.0-41.0-99.0-50.0-190.0465.0-38.026.07589.067.0240.01235.0144.0NANANANA
 us-gaap:NonoperatingIncomeExpense lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▂█▂▃▃▁▆▂▁▃▅▆▃▂▁▂▅▃▃▃▃▃-14.082.0-15.0-2.0-3.0-33.049.0-16.0-31.0-7.025.050.0-2.0-22.0-26.0-22.028.02.04.01.01.02.0NANANANANANANANANANANANANANANANA
 us-gaap:NonoperatingIncomeExpense lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▄▁▂▇▄▃▂█▇▇▄▆▄▅██▅▆-91.0-216.0-169.038.0-101.0-134.0-181.045.05.041.0-106.0-29.0-87.0-42.063.063.0-43.0-26.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NonoperatingIncomeExpense lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▇▆▅▇▇▅▆██▅█▇▇▆▇▇▇▇▇▇▇-417.0-74.0-158.0-183.0-95.0-102.0-174.0-142.0-26.0-33.0-164.0-18.0-97.0-75.0-107.0-90.0-84.0-73.0-76.0-79.0-73.0-80.0NANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▆▇▆▇▇▇▇▇▇▇▁▇▇▇▇▇▇█▇▇▇▇▇▇▇▆▇▇▇▅▆▇█▇▇-46.036.0-60.098.070.058.042.052.067.015.0-1343.0124.080.076.017.0134.089.0257.060.029.035.086.035.063.075.0-107.035.094.0104.0-361.0-104.088.0370.040.0211.0NANANA
 us-gaap:IncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▅▄▄▇▆▅▆▅▇▅▁█▆▅▆▆▆▄▅▇▆▅-9.0-15.0-16.07.05.0-11.0-4.0-12.07.0-6.0-46.019.0-3.0-6.0-2.01.00.0-16.0-7.07.0-1.0-9.0NANANANANANANANANANANANANANANANA
 us-gaap:IncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▆▆▆▇▆▆▆▇▆▆▁▆▆▆▆▆▆█-27.0-25.0-64.028.0-10.0-44.0-25.034.01.0-60.0-497.0-11.0-27.0-26.06.06.0-12.0171.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▇█▇████▇▇█▁███▇█████▇█-10.076.020.063.075.0113.071.030.059.081.0-800.0116.0110.0108.013.0127.099.0100.070.097.030.0125.0NANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▁▁▁▁▁▁▁▂▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-262.02.020.0262.0192.0-127.031.0366.0255.0213.01429.0261.0156.044.0186.0169.0140.0427.089.041.099.019.0130.087.0106.072.0619.0116.0158.08110.0103.0220.0938.0151.0NANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▃▆▆▁▆▇▅▂▅▆▅▂▃▄▆▄▄▆▅▄-38.053.0-44.012.026.0-71.025.041.0-3.0-52.03.022.0-2.0-49.0-40.0-22.025.0-25.0-11.010.0-4.0-15.0NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▂▁▃▅▃▃▂▅▄▄█▄▄▃▅▅▄▇-200.0-343.0-128.042.0-77.0-148.0-185.042.010.0-17.0415.0-35.0-27.0-96.040.041.0-43.0291.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▃▂▃▃▂▂▃▃▃█▃▂▂▂▂▂▂▂▂▂▂-24.0292.0192.0208.0243.092.0191.0283.0248.0282.01011.0274.0185.0189.0186.0150.0160.0163.0115.0152.091.085.0NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▂▂▂▂▂▁▂▃▂▂█▃▂▂▂▂▂▂▁▂▁▁▂64.078.065.069.076.031.071.098.083.082.0316.093.062.065.067.055.060.062.045.063.038.038.057.0NANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▂▄▃▂▂▄▃▃█▃▃▂▃▃▃▄▃▂▃▂▃-326.0-76.0-45.0193.0116.0-158.0-40.0268.0172.0131.01113.0168.094.0-21.0119.0116.080.0365.044.0-22.061.0-19.073.0NANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▇▁▆▄▇▆▃▇▅▆▅█▆15.0-37.09.0-8.010.09.0-23.010.0-2.04.0-4.022.06.0NA-1.0-2.0-1.0NA-2.0-9.0-31.0NANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄█▄▁▃▂▄▂▁▂▂▃40.0143.030.0-38.021.0-2.030.0-3.0-33.0-9.0-2.025.0NANA-9.0-4.0-5.08.0-6.0-10.0-26.0-7.0-10.0-9.02.00.08.011.0-2.0-28.01.0-15.0-2.0-1.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▃▃▃▃▃▂▂▃▃▃█▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▃▂▂▂▁▁▁▁68.068.067.067.079.034.064.0101.080.079.0315.093.062.065.066.054.060.065.044.059.024.038.057.054.056.050.067.034.062.048.0-3.0-1.01.01.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-222.0145.050.0224.0213.0-129.061.0363.0222.0204.01427.0286.0168.044.0177.0165.0135.0435.083.031.073.012.0120.078.0108.072.0627.0127.0156.08082.0104.0205.0936.0150.0NANANANA
us-gaap:NetIncomeLoss ▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-326.0-76.0-45.0193.0116.0-158.0-40.0268.0172.0131.01113.0168.094.0-21.0119.0115.080.0365.044.0-22.061.0-19.073.033.050.022.0552.076.096.08062.0106.0221.0937.0150.0NANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▃▆▆▁▆▇▅▂▅▆▅▂▃▄▇▄▄▆▅▄-38.053.0-44.012.026.0-71.018.041.0-2.0-52.04.022.0-2.0-49.0-40.0-22.032.0-25.0-11.010.0-4.0-15.0NANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▂▁▃▅▃▃▂▅▄▄█▄▄▃▅▅▄▇-200.0-343.0-127.041.0-77.0-148.0-184.042.09.0-17.0415.0-37.0-27.0-96.040.041.0-45.0291.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▄▃▃▃▂▃▃▃▄█▃▃▃▃▃▃▃▂▃▂▂-88.0214.0126.0140.0167.061.0126.0185.0165.0200.0694.0183.0123.0124.0119.096.082.0101.070.089.053.047.0NANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-290.077.0-17.0157.0134.0-163.0-3.0262.0142.0125.01112.0193.0106.0-21.0111.0111.075.0370.039.0-28.049.0-26.063.024.052.022.0560.093.094.08034.0107.0206.0935.0149.0NANANANA
 us-gaap:ComprehensiveIncomeNetOfTax lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▂▆▇▁▆█▅▂▅▆▅▂▃▄▇-39.047.0-45.013.027.0-69.018.040.0-1.0-55.04.022.0-3.0-51.0-41.0-22.033.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▁▁▂▄▃▂▂▄▃▃█▃▃▃▄▄▃-198.0-244.0-110.012.0-68.0-161.0-140.031.0-14.0-18.0416.0-35.0-20.0-94.033.037.0-48.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▄▃▃▃▂▃▃▃▃█▃▃▃▃▂▂-53.0274.0138.0132.0175.067.0119.0191.0157.0198.0692.0206.0129.0124.0119.096.080.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic lmca:EconomicPerformanceGroup lmca:LibertyBravesGroupNA53.0-44.012.026.0-71.018.041.0-2.0-52.04.022.0-2.0-49.0NA-22.032.0NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroupNA214.0NANANA61.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▂▃▂▃▃▂▃▃▃▃█▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▃▂▂▂▁▁▁▁64.078.065.069.076.031.071.098.083.082.0316.093.062.065.067.054.060.062.045.063.038.038.057.054.056.050.067.040.062.048.0-3.0-1.01.01.0NANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
 EBT Margin lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▇▇██▇▆▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁1874.01952.02062.02011.01977.01744.01496.01468.01432.01375.01404.01379.01348.01294.01303.01276.01235.01200.01192.01165.01119.01076.0NANANANANANANANANANANANANANANANA
 Operating Margin lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▇▇██▇▆▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁1874.01952.02062.02011.01977.01744.01496.01468.01432.01375.01404.01379.01348.01294.01303.01276.01235.01200.01192.01165.01119.01076.0NANANANANANANANANANANANANANANANA
 SG&A Ratio lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▁▂▂██▂▂█▇▂▂▇▇▁▁▅▅▁▁▅▄▁11.022.034.0212.0208.022.032.0200.0182.028.020.0185.0176.05.018.0109.0131.04.016.0119.0103.05.0NANANANANANANANANANANANANANANANA
 SG&A Ratio lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▁▁▇██▃▆█▇▂▇▆█▂24.039.0523.0633.0620.0246.0481.0647.0585.0114.0570.0501.0616.096.0NANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▇▇██▇▆▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁1874.01952.02062.02011.01977.01744.01496.01468.01432.01375.01404.01379.01348.01294.01303.01276.01235.01200.01192.01165.01119.01076.0NANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:Assets ██████▇▇▇▇▇▇▇▇▅▅▅▅▅▅▅▅▅▆▆▆▆▆▆▅▁46208.043918.044189.043645.043700.043910.040828.041624.041807.042540.041996.041853.041384.041002.031377.031563.030889.030326.029798.030680.031111.031430.031207.033845.034075.033693.034542.033943.033884.032396.08325.0NANANA7719.0NANANA
us-gaap:Liabilities █▇▇▇▇▇▆▆▆▇▇▇▇▇▅▅▄▄▄▄▄▄▄▄▄▃▄▄▃▃▁24120.022216.022264.021467.021219.020715.019130.019255.019342.020065.019422.020399.020300.020226.013661.013570.012838.012241.011667.012238.012152.011790.011031.011251.011138.09816.010660.09964.09571.07645.01893.0NANANA2470.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ██████▇▇▇▇▇▇▇▇▅▅▅▅▅▅▅▅▅▆▆▆▆▆▆▅▁46208.043918.044189.043645.043700.043910.040828.041624.041807.042540.041996.041853.041384.041002.031377.031563.030889.030326.029798.030680.031111.031430.031207.033845.034075.033693.034542.033943.033884.032396.08325.0NANANA7719.0NANANA
us-gaap:StockholdersEquity █▇█████████▇▇▇▅▄▄▄▄▄▄▄▄▆▆▆▆▆▆▆▁16610.016167.016295.016517.016596.016707.016595.016860.016888.016977.016943.015839.015448.014980.011756.011705.011647.011381.010933.010994.011075.011308.011398.014021.013976.014141.014081.014419.014376.014277.06440.0NANANA5259.0NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:AssetsCurrent █▄▄▃▃▃▂▂▂▃▃▂▂▃▂▂▃▂▁▃▄▄▃▃▃▃▄▄▃▅▃5381.02989.02405.01936.01931.01732.01082.01241.01327.01919.01763.01435.01433.01708.01029.01472.01768.01164.0691.02110.02478.02737.02344.02171.02274.01801.02494.02481.02365.03458.02211.0NANANA3860.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▄▃▂▂▂▁▁▂▃▃▂▂▃▂▂▃▂▁▂▂▃▂▁▂▁▃▃▂▄▃▁▂3999.01801.01222.0694.0697.0633.0358.0355.0485.01042.01029.0783.0744.01071.0562.0940.01229.0602.0201.0588.0790.01172.0681.0377.0566.0377.01088.01171.0937.01900.01353.0323.0646.0NA2070.0841.0NANA
us-gaap:ReceivablesNetCurrent ▆▆▇▇█▇▃▄▃▃▃▃▃▂▁▂▂▁▁▂▂▁▁▁▁▁▁▁▂▁▂673.0700.0767.0778.0849.0728.0364.0440.0428.0394.0358.0353.0363.0280.0240.0274.0276.0244.0247.0278.0332.0228.0235.0243.0240.0204.0206.0225.0259.0237.0286.0NANANA288.0NANANA
us-gaap:OtherAssetsCurrent █▅▄▅▄▄▄▅▄▅▄▃▃▄▂▂▂▂▂▄▃▃▃▃▃▃▃▂▂▃▁709.0488.0416.0464.0385.0371.0360.0446.0414.0483.0376.0299.0326.0357.0227.0258.0263.0257.0228.0385.0348.0298.0298.0340.0305.0290.0284.0207.0230.0303.0148.0NANANA45.0NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:PropertyPlantAndEquipmentGross █████▇████▇▇▇▇▇▆▆▆▅▅▅▅▅▅▅▅▄▄▄▄▁3849.03803.03780.03714.03630.03562.03765.03821.03755.03727.03596.03485.03393.03329.03182.02980.02792.02698.02587.02443.02321.02321.02257.02282.02252.02206.02149.02090.02023.01963.0468.0NANANA504.0NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ███▇▇▇▆▆▆▆▅▅▅▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▁▁▁1604.01558.01518.01484.01419.01357.01296.01245.01183.01124.01055.0971.0922.0863.0830.0817.0750.0748.0708.0656.0604.0552.0501.0496.0446.0394.0341.0298.0250.0180.0261.0NANANA289.0NANANA
us-gaap:AmortizationOfIntangibleAssets █████▇▆▇▇▆▆▇▇▅▂▂▂▂▂▂▂▂▂▂▂▂▅▂▃▂▁197.0198.0197.0204.0207.0182.0162.0170.0168.0154.0146.0167.0165.0116.037.045.047.039.039.044.040.032.035.038.041.036.0108.030.055.026.07.0NANA3.0NANANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇▇▇▇████████▇▇▆▆▆▆▅▆▆▆▆▆▆▆▆▆▁2245.02245.02262.02230.02211.02205.02469.02576.02572.02603.02541.02514.02471.02466.02352.02163.02042.01950.01879.01787.01717.01769.01756.01786.01806.01812.01808.01792.01773.01783.0207.0NANANA215.0NANANA
us-gaap:Goodwill ██████▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁19956.019939.019939.019952.019948.019927.018386.018386.018383.018383.018383.018395.018398.018313.014345.014345.014345.014345.014345.014345.014345.014345.014345.014391.014389.014389.014365.014203.014221.014215.0332.0NANANA332.0NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▇▇▇███▇▇▇█████▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁5653.05790.05940.06079.06222.06367.05715.05830.05952.06015.06131.06242.06373.06467.01072.01070.01068.01080.01097.01112.01125.01081.01096.01145.01170.01208.01200.0964.0987.01039.0120.0NANANA135.0NANANA
us-gaap:OtherAssetsNoncurrent ▇▆█▇▇▅▃▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▂1694.01508.02013.01745.01689.01246.0583.0781.0811.0715.0640.0701.0709.0692.0480.0435.0378.0434.0465.0353.0367.0356.0326.0282.0296.0290.0379.0192.0179.091.0240.0NANANA238.0NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:LiabilitiesCurrent █▆▅▅▅▅▅▅▅▅▅▅▅▅▄▅▄▄▄▄▄▄▄▅▅▅▄▄▄▄▁6015.04584.03888.03882.03973.03961.03244.03379.03655.03587.03979.03354.03311.03512.02872.03286.02995.02965.02813.02761.02970.02684.02650.03231.03321.03291.03172.02760.02424.02452.0385.0NANANA1230.0NANANA
us-gaap:DebtCurrent █▃▁▁▁▁▁▁▁▁▄▁▁▁▁▃▂▂▂▂▂▂▂▄▄▄▄▃▁▁▁1874.0590.060.014.013.013.017.018.018.036.0768.047.05.048.05.0609.0256.0256.0255.0256.0258.0258.0257.0754.0762.0770.0777.0496.04.04.04.0NANANA754.0NANANA
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▅▄█▇▇▅▂▁▃▁▃1401.01308.01621.01537.01507.01347.01116.01097.01229.01064.01250.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▅▅▅▅▅▅▂▂▂▂▂▂▂▂▁▁▃▄▁▂▂▂▃▇█▆▇▃▃▂▂102.0101.094.0110.097.0102.032.029.021.024.020.028.022.027.05.015.048.066.03.033.017.029.040.0157.0173.0128.0150.045.044.025.037.0NANANA85.0NANANA
us-gaap:ContractWithCustomerLiabilityCurrent █▇▃▄▅▇▂▄▅▆▁2638.02585.02113.02235.02356.02499.02079.02235.02387.02463.01941.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:LongTermDebt █▇▇▇▇▇▇▇▆▇▇▇▇▆▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▁16854.015143.015476.014721.014424.014039.013388.013398.013270.014113.013954.013492.013524.013354.08018.08119.07531.07118.06896.06802.06557.06471.05852.06074.05939.04668.05555.04881.04363.02419.0540.0NANANA1295.0NANANA
us-gaap:LongTermDebtNoncurrent █████▇▇▇▇▇▇▇▇▇▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▁14980.014553.015416.014707.014411.014026.013371.013380.013252.014077.013186.013445.013519.013306.08013.07510.07275.06862.06626.06546.06299.06213.05595.05320.05177.03898.04778.04385.04359.02415.0536.0NANANA541.0NANANA
us-gaap:MinorityInterest ▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇██▇██▁5478.05535.05630.05661.05885.06488.05103.05509.05577.05498.05631.05615.05636.05796.05960.06288.06404.06704.07198.07448.07884.08332.08778.08573.08961.09736.09801.09560.09937.010474.0-8.0NANANA-10.0NANANA
us-gaap:OtherLiabilitiesNoncurrent ██▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▃▃▃▃▂▂▂▂▂▂▁1121.01115.01047.01006.01011.0978.0864.0886.0884.0891.0779.0786.0777.0762.0751.0765.0716.0626.0561.0502.0354.0354.0348.0375.0204.0225.0234.0263.0276.0285.0131.0NANANA251.0NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:StockholdersEquity █▇█████████▇▇▇▅▄▄▄▄▄▄▄▄▆▆▆▆▆▆▆▁16610.016167.016295.016517.016596.016707.016595.016860.016888.016977.016943.015839.015448.014980.011756.011705.011647.011381.010933.010994.011075.011308.011398.014021.013976.014141.014081.014419.014376.014277.06440.0NANANA5259.0NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▇▇▇▇▇▇▇▇▇▇▇▇▇▆▅▅▅▅▅▆▆▆▆▇▇█████▁22088.021702.021925.022178.022481.023195.021698.022369.022465.022475.022574.021454.021084.020776.017716.017993.018051.018085.018131.018442.018959.019640.020176.022594.022937.023877.023882.023979.024313.024751.06432.0NANANA5249.0NANANA
 us-gaap:CommonStockValue lmca:EconomicPerformanceGroup,us-gaap:StatementClassOfStock lmca:LibertyFormulaOneGroup,us-gaap:CommonClassC██████████████▁2.02.02.02.02.02.02.02.02.02.02.02.02.02.01.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdditionalPaidInCapital ▇▅▆▆▆▇▆▇▇████▇▁3110.02371.02575.02780.03016.03261.02984.03246.03533.03764.03892.03900.03695.03331.087.0NANANANANANANANA2057.02036.02255.02217.03115.03153.03148.03348.0NANANA3564.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ███████████▇▇▇▇▇▆▆▆▆▆▆▆▇▇▇▇▆▆▆▁13339.013671.013748.013793.013600.013484.013644.013684.013419.013247.013081.011968.011800.011706.011727.011608.011426.011346.010981.011037.011112.011333.011416.011964.011931.011881.011859.011307.011237.011141.03079.0NANANA1665.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax █▇▂▁▃▂▂▁▁▂▂▂▂▁▁▂▂▂▂▂▂▂▃▃▃▃▃▃▃▃▄156.0120.0-33.0-61.0-25.0-43.0-38.0-75.0-69.0-39.0-35.0-34.0-52.0-62.0-62.0-54.0-51.0-46.0-51.0-46.0-40.0-28.0-21.0-3.06.04.04.0-4.0-15.0-13.012.0NANANA29.0NANANA
us-gaap:MinorityInterest ▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇██▇██▁5478.05535.05630.05661.05885.06488.05103.05509.05577.05498.05631.05615.05636.05796.05960.06288.06404.06704.07198.07448.07884.08332.08778.08573.08961.09736.09801.09560.09937.010474.0-8.0NANANA-10.0NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues 754.0NANANANANANANANANA0.00.00.01617.00.0NANANANANANANANANANANANA-28.010.057.0NANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▂▅▆▇▇█▃▃▁49.071.078.079.079.089.055.054.042.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▆▆▆▇▆▄▇▆▅▆▄▅▆▅▅█▄▃▄▄▄▃▄▄▄▄▄▄▃▁▁▂312.0557.0543.0598.0523.0649.0521.0367.0644.0624.0419.0574.0336.0403.0520.0389.0448.0814.0338.0193.0367.0315.0324.0237.0270.0294.0347.0282.0268.0339.0183.0-16.0-39.0108.0NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇▆▆▇▇▇▇▇▆▆▆▅▃▆▅▇▆▆▇▇▇▇▆▆▆▆▇▁▇▇▅▇█-145.0-58.0-96.0-102.0258.0254.012.0-82.0124.0-424.0-223.0-446.0-671.0-1797.0-254.0-924.039.0-125.0-337.0-66.0-27.0144.0-10.0-132.0-158.0-111.0-524.0-35.0-2562.0357.0332.0-706.0-4.0592.0NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▅▄▄▅▄▄█▅▅▆▄▄▄▃▁▃▄▄-15.0-24.0-31.0-21.0-31.0-24.0141.0-4.0-9.031.0-38.0-46.0-51.0-86.0-188.0-114.0-66.0-45.0NANANA-35.0NANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▇█▇▇▇▇▇▇█▇▇▇▇▁▇▄-9.0110.059.0-1.0-11.0-10.0-5.0-12.0228.016.0-3.05.0-14.0-1650.08.0-745.0NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▅▅▅▅██▅▅▅▂▄▃▁▅▅▅▅▅-121.0-144.0-124.0-80.0300.0288.0-124.0-66.0-95.0-471.0-182.0-405.0-606.0-61.0-74.0-65.0-37.0-34.0NANANA-34.0NANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▄▃▂▂▃▃▁▃▄▄▄█▂▄▄▃▃▃▂▄▄▃▄▂▄▄▇▂▃▄▃▂2031.038.081.0-469.0-700.0-685.0-531.0-398.0-1281.0-170.053.0-91.04.01902.0-644.0246.0140.0-288.0-388.0-329.0-722.032.0-10.0-294.077.0-894.094.0-13.01331.0-599.0-185.0-1.0-152.0-829.0NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▄▄▂▃▃▂▂▁▂▃▂▁▄2196.0529.0533.022.080.0219.01.0-112.0-516.032.0253.040.0-327.0509.0NANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▆▆▆▆▇▆▄▇▆▅▆▄▅▆▅▅█▄▃▄▄▄▃▄▄▄▄▄▄▃▁▁▂312.0557.0543.0598.0523.0649.0521.0367.0644.0624.0419.0574.0336.0403.0520.0389.0448.0814.0338.0193.0367.0315.0324.0237.0270.0294.0347.0282.0268.0339.0183.0-16.0-39.0108.0NANANANA
us-gaap:NetIncomeLoss ▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-326.0-76.0-45.0193.0116.0-158.0-40.0268.0172.0131.01113.0168.094.0-21.0119.0115.080.0365.044.0-22.061.0-19.073.033.050.022.0552.076.096.08062.0106.0221.0937.0150.0NANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▃▆▆▁▆▇▅▂▅▆▅▂▃▄▇▄▄▆▅▄-38.053.0-44.012.026.0-71.018.041.0-2.0-52.04.022.0-2.0-49.0-40.0-22.032.0-25.0-11.010.0-4.0-15.0NANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▂▁▃▅▃▃▂▅▄▄█▄▄▃▅▅▄▇-200.0-343.0-127.041.0-77.0-148.0-184.042.09.0-17.0415.0-37.0-27.0-96.040.041.0-45.0291.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▄▃▃▃▂▃▃▃▄█▃▃▃▃▃▃▃▂▃▂▂-88.0214.0126.0140.0167.061.0126.0185.0165.0200.0694.0183.0123.0124.0119.096.082.0101.070.089.053.047.0NANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▁▁▁▁▁▁▁▂▁▁▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁█▁▁▂▁-262.02.020.0262.0192.0-127.031.0366.0255.0213.01429.0261.0156.044.0186.0169.0140.0427.089.041.099.019.0130.087.0106.072.0619.0116.0158.08110.0103.0220.0938.0151.0NANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▃█▃▆▆▁▆▇▅▂▅▆▅▂▃▄▆▄▄▆▅▄-38.053.0-44.012.026.0-71.025.041.0-3.0-52.03.022.0-2.0-49.0-40.0-22.025.0-25.0-11.010.0-4.0-15.0NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▂▁▃▅▃▃▂▅▄▄█▄▄▃▅▅▄▇-200.0-343.0-128.042.0-77.0-148.0-185.042.010.0-17.0415.0-35.0-27.0-96.040.041.0-43.0291.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▃▂▃▃▂▂▃▃▃█▃▂▂▂▂▂▂▂▂▂▂-24.0292.0192.0208.0243.092.0191.0283.0248.0282.01011.0274.0185.0189.0186.0150.0160.0163.0115.0152.091.085.0NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▂▂▂▂▂▁▂▃▂▂█▃▂▂▂▂▂▂▁▂▁▁▂64.078.065.069.076.031.071.098.083.082.0316.093.062.065.067.055.060.062.045.063.038.038.057.0NANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▂▄▃▂▂▄▃▃█▃▃▂▃▃▃▄▃▂▃▂▃-326.0-76.0-45.0193.0116.0-158.0-40.0268.0172.0131.01113.0168.094.0-21.0119.0116.080.0365.044.0-22.061.0-19.073.0NANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▆▇▆▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▅▆▇█▇-73.039.0-76.081.061.054.035.060.052.020.0-1350.0110.050.0126.020.0227.066.0114.077.017.011.070.082.070.032.0-93.018.085.0102.0-377.0-51.0106.0364.031.0NANANANA
 us-gaap:DeferredIncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup█▂▁-3.0-13.0-14.0NANA2.0-4.05.00.0-2.0-26.05.0-8.031.011.010.0-11.0-9.0-1.02.0-4.0-3.0NANANANANANANANANANANANANANANANA
 us-gaap:DeferredIncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▇▇▆▇▇▆▇▇▇▆▁▇▆▇▇█▇▇-32.0-15.0-98.020.0-6.0-57.0-33.019.02.0-51.0-511.0-1.0-50.0-12.0-4.092.0-20.026.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:DeferredIncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▇█▇▇███▇▇█▁███▇█████▇█-38.067.036.054.069.0109.072.036.050.073.0-813.0106.0108.0107.013.0129.095.095.065.086.019.0120.0NANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▄▆▇▇▇█▅▅▅▅▅█▅▄▄▄▄▄▅▅▅▄▆▅▅▅▅▅▅▄▅▁▁▁45.067.074.076.076.086.047.046.053.046.048.085.053.044.041.041.034.034.057.056.047.044.066.053.049.049.052.052.048.041.048.07.05.06.0NANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇▆▆▇▇▇▇▇▆▆▆▅▃▆▅▇▆▆▇▇▇▇▆▆▆▆▇▁▇▇▅▇█-145.0-58.0-96.0-102.0258.0254.012.0-82.0124.0-424.0-223.0-446.0-671.0-1797.0-254.0-924.039.0-125.0-337.0-66.0-27.0144.0-10.0-132.0-158.0-111.0-524.0-35.0-2562.0357.0332.0-706.0-4.0592.0NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertyBravesGroup▅▄▄▅▄▄█▅▅▆▄▄▄▃▁▃▄▄-15.0-24.0-31.0-21.0-31.0-24.0141.0-4.0-9.031.0-38.0-46.0-51.0-86.0-188.0-114.0-66.0-45.0NANANA-35.0NANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▇█▇▇▇▇▇▇█▇▇▇▇▁▇▄-9.0110.059.0-1.0-11.0-10.0-5.0-12.0228.016.0-3.05.0-14.0-1650.08.0-745.0NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▅▅▅▅██▅▅▅▂▄▃▁▅▅▅▅▅-121.0-144.0-124.0-80.0300.0288.0-124.0-66.0-95.0-471.0-182.0-405.0-606.0-61.0-74.0-65.0-37.0-34.0NANANA-34.0NANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquireInvestments ▁▂▁▁▁▁▁▁▁▅▂▄▅▁▁█▁▁5.082.04.05.09.011.011.04.06.0393.0102.0318.0437.05.022.0751.00.011.0NANANANA14.00.0167.02.01.00.02566.018.0293.01216.0205.02.0NANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▄▃▂▂▃▃▁▃▄▄▄█▂▄▄▃▃▃▂▄▄▃▄▂▄▄▇▂▃▄▃▂2031.038.081.0-469.0-700.0-685.0-531.0-398.0-1281.0-170.053.0-91.04.01902.0-644.0246.0140.0-288.0-388.0-329.0-722.032.0-10.0-294.077.0-894.094.0-13.01331.0-599.0-185.0-1.0-152.0-829.0NANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▅▃▃▆▅▃▄▂▁▄▃█▃▅▂▂▃▂▂▂▁▄▂▁1982.0853.01002.02139.01966.0913.01307.0727.0266.01317.0877.03223.0753.01844.0726.0566.01118.0335.0434.0436.068.01275.0540.0270.0NANA1712.01402.0NANA500.00.0NANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▂▂▂▆▅▃▃▂▄▄▂█▂▄▃▁▃▁▂▁▁▃▂▁▃▃▃▃▃▁▂▁▁▃512.0372.0526.01958.01646.0741.01043.0596.01264.01154.0288.03028.0637.01154.0873.060.0705.0111.0378.0157.03.0658.0276.087.0752.0821.01048.0886.0844.01.0504.00.00.0750.0NANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▅▃▃▄█▄▆▇▂0.0138.069.068.084.0222.098.0150.0187.031.0NANANANANANANANA47.03.0242.058.0NANA0.00.00.00.00.0140.081.08.0155.079.0NANANANA
 us-gaap:PaymentsForRepurchaseOfCommonStock lmca:EconomicPerformanceGroup lmca:LibertyFormulaOneGroup▁█0.069.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsForRepurchaseOfCommonStock lmca:EconomicPerformanceGroup lmca:LibertySiriusXmGroup▁▃▂▃▄█▄▆▇▂0.069.045.068.084.0222.098.0150.0187.031.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31

None

us-gaap:CommonStockValue lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.01000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets lmca:LibertyFormulaOneGroup us-gaap:CommonClassC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value0.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010
Percentage of PreferredStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

None

us-gaap:CommonStockSharesIssued lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

lmca:LibertyBravesGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1010101010101010101010101010101010
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyBravesGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.9818240.9818240.981860.981860.981860.981860.981860.981860.981860.981860.981860.981860.9867910.9867910.9867910.9868280.986828
Percentage of CommonStockSharesIssued9.59.59.59.69.69.69.69.69.69.69.69.69.69.69.69.69.6

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3939393939393939393939383838383838
Percentage of CommonStockSharesIssued387.2387.2386.9387.6387.9388.0387.9387.9387.9387.9387.8373.3373.5373.5373.5373.5373.4

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value252525252525252525252525252525
Percentage of CommonStockSharesIssued250.5250.5250.5250.4250.5250.5250.6250.6250.5250.4250.4250.4250.4250.1250.2

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2.4481412.4481412.4482332.4490062.4491852.4534852.4534852.4539212.4541262.4544482.4544482.4544482.4667782.4667782.466778
Percentage of CommonStockSharesIssued23.723.723.723.823.923.923.924.024.024.024.024.024.124.124.1

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-05-312017-03-312016-12-31
Value2032032032032022022022022022022022011861217355
Percentage of CommonStockSharesIssued1972.71972.71972.01977.41979.41980.61980.41980.51979.71979.71979.11967.01825.50.01698.4544.8

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value101101103102102102102102102102102102102102102102102
Percentage of CommonStockSharesIssued983.5983.51002.11002.51003.21003.71003.61003.51003.41002.81002.61002.51001.81001.21000.81000.31000.2

lmca:LibertySiriusXmGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value9.8082329.8082329.8086019.8107779.8147779.8215319.8215319.8215319.8215319.8215319.8215319.8215319.8708569.8708569.8708569.8709669.870956
Percentage of CommonStockSharesIssued95.195.195.195.595.795.895.995.995.995.995.995.996.496.496.596.596.5

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value232202203203205207213215218222223223223223222222222
Percentage of CommonStockSharesIssued2252.31962.71971.61985.32003.42026.02080.42104.72136.22176.72182.82182.52181.92180.82179.02177.52177.5

None

us-gaap:PreferredStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value505050505050505050505050505050505050505050505050505050505050500.0
Percentage of PreferredStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

None

us-gaap:CommonStockSharesOutstanding lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

lmca:LibertyBravesGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1010101010101010101010101010101010
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyBravesGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.9818240.9818240.981860.981860.981860.981860.981860.981860.981860.981860.981860.981860.9867910.9867910.9867910.9868280.986828
Percentage of CommonStockSharesOutstanding9.59.59.59.69.69.69.69.69.69.69.69.69.69.69.69.69.6

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3939393939393939393939383838383838
Percentage of CommonStockSharesOutstanding387.2387.2386.9387.6387.9388.0387.9387.9387.9387.9387.8373.3373.5373.5373.5373.5373.4

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value252525252525252525252525252525
Percentage of CommonStockSharesOutstanding250.5250.5250.5250.4250.5250.5250.6250.6250.5250.4250.4250.4250.4250.1250.2

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2.4481412.4481412.4482332.4490062.4491852.4534852.4534852.4539212.4541262.4544482.4544482.4544482.4667782.4667782.466778
Percentage of CommonStockSharesOutstanding23.723.723.723.823.923.923.924.024.024.024.024.024.124.124.1

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value20320320320320220220220220220220220118617355
Percentage of CommonStockSharesOutstanding1972.71972.71972.01977.41979.41980.61980.41980.51979.71979.71979.11967.01825.51698.4544.8

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value101101103102102102102102102102102102102102102102102
Percentage of CommonStockSharesOutstanding983.5983.51002.11002.51003.21003.71003.61003.51003.41002.81002.61002.51001.81001.21000.81000.31000.2

lmca:LibertySiriusXmGroup, us-gaap:CommonClassB


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value9.8082329.8082329.8086019.8107779.8147779.8215319.8215319.8215319.8215319.8215319.8215319.8215319.8708569.8708569.8708569.8709569.870956
Percentage of CommonStockSharesOutstanding95.195.195.195.595.795.895.995.995.995.995.995.996.496.496.596.596.5

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value232202203203205207213215218222223223223223222222222
Percentage of CommonStockSharesOutstanding2252.31962.71971.61985.32003.42026.02080.42104.72136.22176.72182.82182.52181.92180.82179.02177.52177.5

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding lmca:EconomicPerformanceGroup

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value60616161616160605959595945
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value2372332332332332322322332182141798584
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding395.0382.0382.0382.0382.0380.3386.7388.3369.5362.7303.4144.1186.7

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value329319321323327335337340340339339337337
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding548.3523.0526.2529.5536.1549.2561.7566.7576.3574.6574.6571.2748.9

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic lmca:EconomicPerformanceGroup

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value51515151515151514949494936
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value2322322312312312312312312162071738483
Percentage of WeightedAverageNumberOfSharesOutstandingBasic454.9454.9452.9452.9452.9452.9452.9452.9440.8422.4353.1171.4230.6

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value328315317319323330333336336335335335335
Percentage of WeightedAverageNumberOfSharesOutstandingBasic643.1617.6621.6625.5633.3647.1652.9658.8685.7683.7683.7683.7930.6

None

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

lmca:LibertyBravesGroup, lmca:CommonClassAandC


None
Period End2020-06-30
Value3.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0

lmca:LibertyBravesGroup, us-gaap:CommonClassA


None
Period End2020-03-312019-09-302019-06-302019-03-312017-09-302017-06-302017-03-312016-06-30
Value3.02.02.02.02.02.02.02.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.00.00.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, lmca:CommonClassAandC


None
Period End2020-06-30
Value12
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount400.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassA


None
Period End2020-03-312019-09-302019-06-302019-03-312017-09-302017-06-302017-03-31
Value6.05.05.010.05.05.08.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, lmca:CommonClassAandC


None
Period End2020-06-302020-03-312019-09-30
Value252222
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount833.30.00.0

None

us-gaap:EarningsPerShareBasic lmca:EconomicPerformanceGroup

us-gaap:EarningsPerShareBasic

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.751.04-0.860.240.51-1.390.350.8-0.04-1.020.080.45-0.04-1.0-0.82-0.450.89
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.86-1.48-0.550.18-0.33-0.64-0.80.180.04-0.071.8-0.17-0.13-0.550.480.49-0.54
Percentage of EarningsPerShareBasic114.7-142.364.075.0-64.746.0-228.622.5-100.06.92250.0-37.8325.055.0-58.5-108.9-60.7

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.270.680.40.440.520.190.390.560.50.62.070.540.370.370.360.290.24
Percentage of EarningsPerShareBasic36.065.4-46.5183.3102.0-13.7111.470.0-1250.0-58.82587.5120.0-925.0-37.0-43.9-64.427.0

None

us-gaap:EarningsPerShareDiluted lmca:EconomicPerformanceGroup

us-gaap:EarningsPerShareDiluted

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.75-0.69-0.860.160.46-1.39-0.070.8-0.04-1.020.070.45-0.04-1.0-0.82-0.450.11
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.86-1.48-0.550.18-0.33-0.64-0.80.180.04-0.071.79-0.17-0.13-0.550.470.48-0.54
Percentage of EarningsPerShareDiluted114.7214.564.0112.5-71.746.01142.922.5-100.06.92557.1-37.8325.055.0-57.3-106.7-490.9

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-0.270.570.390.440.520.190.380.550.490.592.040.540.360.370.350.280.24
Percentage of EarningsPerShareDiluted36.0-82.6-45.3275.0113.0-13.7-542.968.8-1225.0-57.82914.3120.0-900.0-37.0-42.7-62.2218.2

None

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value19092013261928562805201220092315219915171994206521401395132113851366120412081284122210811095118411601011102511101078789467555537440973540538973
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value112234212208223220018228201851765.0181091314.0161191035.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.11.37.47.41.11.68.68.31.81.09.08.20.41.47.99.60.31.39.38.40.5
Percentage of Revenues0.61.11.37.47.41.11.68.68.31.81.09.08.20.41.47.99.60.31.39.38.40.5
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value243952363362024648164758511457050161696
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.920.022.222.112.223.927.926.67.528.624.328.86.9
Percentage of Revenues1.31.920.022.222.112.223.927.926.67.528.624.328.86.9
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1874195220622011197717441496146814321375140413791348129413031276123512001192116511191076
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.297.078.770.470.586.774.563.465.190.670.466.863.092.898.692.190.499.798.790.791.699.5
Percentage of Revenues98.297.078.770.470.586.774.563.465.190.670.466.863.092.898.692.190.499.798.790.791.699.5
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:ProductOrService

lmca:LibertyBravesGroup, us-gaap:CorporateNonSegment, lmca:Baseball


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5.0122031981419017220
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.67.17.10.78.27.81.3
Percentage of Revenues0.30.67.17.10.78.27.81.3
Percentage of Revenues lmca:LibertyBravesGroup us-gaap:CorporateNonSegment lmca:Baseball0.00.00.00.00.00.00.00.0

lmca:LibertyBravesGroup, us-gaap:CorporateNonSegment, lmca:DevelopmentLeases


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value6.010.09.010.08.010.010.08.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.50.30.40.40.40.50.5
Percentage of Revenues0.30.50.30.40.40.40.50.5
Percentage of Revenues lmca:LibertyBravesGroup us-gaap:CorporateNonSegment lmca:DevelopmentLeases0.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

lmca:LibertyFormulaOneGroup, us-gaap:OperatingSegments, lmca:OtherRevenue, lmca:FormulaOne


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value122680894887
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.32.83.22.43.8
Percentage of Revenues0.61.32.83.22.43.8
Percentage of Revenues lmca:LibertyFormulaOneGroup us-gaap:OperatingSegments lmca:OtherRevenue lmca:FormulaOne0.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, us-gaap:OperatingSegments, lmca:PrimaryFormulaOneRevenue, lmca:FormulaOne


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1213553531198560
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.619.418.99.824.2
Percentage of Revenues0.60.619.418.99.824.2
Percentage of Revenues lmca:LibertyFormulaOneGroup us-gaap:OperatingSegments lmca:PrimaryFormulaOneRevenue lmca:FormulaOne0.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, lmca:OtherRevenue, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value354144413640
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.82.01.51.51.81.7
Percentage of Revenues1.82.01.51.51.81.7
Percentage of Revenues lmca:LibertySiriusXmGroup us-gaap:OperatingSegments lmca:OtherRevenue lmca:SiriusXmHoldings0.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, lmca:ProductEquipment, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2541454141413735
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.32.01.61.52.01.81.72.3
Percentage of Revenues1.32.01.61.52.01.81.72.3
Percentage of Revenues lmca:LibertySiriusXmGroup us-gaap:OperatingSegments lmca:ProductEquipment lmca:SiriusXmHoldings0.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, us-gaap:Advertising, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value236285366358209464742
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.414.212.812.810.42.02.12.8
Percentage of Revenues12.414.212.812.810.42.02.12.8
Percentage of Revenues lmca:LibertySiriusXmGroup us-gaap:OperatingSegments us-gaap:Advertising lmca:SiriusXmHoldings0.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, us-gaap:SubscriptionAndCirculation, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value15781585155615371458134113041258
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.778.754.554.872.557.959.382.9
Percentage of Revenues82.778.754.554.872.557.959.382.9
Percentage of Revenues lmca:LibertySiriusXmGroup us-gaap:OperatingSegments us-gaap:SubscriptionAndCirculation lmca:SiriusXmHoldings0.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax lmca:EconomicPerformanceGroup, us-gaap:ProductOrService

lmca:LibertyBravesGroup, lmca:ProductServiceOrOther


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value112234212208223220018228201851765.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.11.37.47.41.11.68.68.31.81.09.08.20.4
Percentage of Revenues0.61.11.37.47.41.11.68.68.31.81.09.08.20.4
Percentage of Revenues lmca:LibertyBravesGroup lmca:ProductServiceOrOther0.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0

lmca:LibertyFormulaOneGroup, lmca:Formula


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2439523633620246691560585114
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.920.022.222.112.234.424.226.67.5
Percentage of Revenues1.31.920.022.222.112.234.424.226.67.5
Percentage of Revenues lmca:LibertyFormulaOneGroup lmca:Formula0.00.00.00.00.00.00.086.6100.0100.0

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldingsRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18741952206220111977174414961468
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.297.078.770.470.586.774.563.4
Percentage of Revenues98.297.078.770.470.586.774.563.4
Percentage of Revenues lmca:LibertySiriusXmGroup lmca:SiriusXmHoldingsRevenue0.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

lmca:Formula


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value243952363362024648164758511457050161696
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.920.022.222.112.223.927.926.67.528.624.328.86.9
Percentage of Revenues1.31.920.022.222.112.223.927.926.67.528.624.328.86.9
Percentage of Revenues lmca:Formula0.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0

lmca:ProductServiceOrOther


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1122342122082235350518228-676.0428413221
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.11.37.47.41.117.621.88.31.8-33.920.719.315.8
Percentage of Revenues0.61.11.37.47.41.117.621.88.31.8-33.920.719.315.8
Percentage of Revenues lmca:ProductServiceOrOther0.00.00.00.00.00.00.0100.038.39.80.0100.0100.0100.0

lmca:SiriusXmHoldingsRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18741952206220111977174414961468
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.297.078.770.470.586.774.563.4
Percentage of Revenues98.297.078.770.470.586.774.563.4
Percentage of Revenues lmca:SiriusXmHoldingsRevenue0.00.00.00.00.00.00.00.0

None

us-gaap:Revenues

us-gaap:Revenues


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value19092013261928562805201220092315219915171994206521401395132113851366120412081284122210811095118411601011102511101078789467555537440973540538973
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:GainLossOnInvestments

us-gaap:GainLossOnInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-180.01.0-144.014-87.0-98.0-140.0-31.058153-45.018-49.0-12.0
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.40.0-5.50.5-3.1-4.9-7.0-1.32.610.1-2.30.9-2.3-0.9

us-gaap:GainLossOnInvestments lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.0-9.02.0-2.0-2.0-2.0-3.01.0
Percentage of GainLossOnInvestments0.6-900.0-1.4-14.32.32.02.1-3.2
Percentage of Revenues-0.1-0.40.1-0.1-0.1-0.1-0.10.0
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-9.40.5

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.015-99.026-100.0-97.0-67.019-4.09533-44.0-49.0-12.0
Percentage of GainLossOnInvestments-2.81500.068.8185.7114.999.047.9-61.3-6.962.1-73.3-244.4100.0100.0
Percentage of Revenues0.30.7-3.80.9-3.6-4.8-3.30.8-0.26.31.7-2.1-2.3-0.9
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-13.92.9-0.783.35.8-8.8-8.0-12.5

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-184.0-5.0-47.0-10.0151.0-70.0-51.06258-78.062
Percentage of GainLossOnInvestments102.2-500.032.6-71.4-17.2-1.050.0164.5106.937.9173.3344.4
Percentage of Revenues-9.6-0.2-1.8-0.40.50.0-3.5-2.22.83.8-3.93.0
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-4.7-3.54.34.2-5.64.5

us-gaap:GainLossOnInvestments us-gaap:FinancialInstrument

lmca:BondHedgeChangeInFairValue


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value73-323.068-12.051-41.097206.04678
Percentage of GainLossOnInvestments-40.6-32300.0485.713.8-52.0132.3167.213.133.3-93.9-650.0
Percentage of Revenues3.8-16.02.4-0.42.5-1.84.41.30.32.15.6
Percentage of Revenues lmca:BondHedgeChangeInFairValue0.00.00.00.00.00.00.00.00.00.00.0

lmca:DebtMeasuredAtFairValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-262.0544-289.0-62.0-71.0-162.020726-133.030110-42.0-78.0-116.0
Percentage of GainLossOnInvestments145.654400.0200.7-442.981.6165.3-147.9-83.9-229.319.6-244.4-233.3159.2966.7
Percentage of Revenues-13.727.0-11.0-2.2-2.5-8.110.31.1-6.02.05.5-2.0-3.6-8.3
Percentage of Revenues lmca:DebtMeasuredAtFairValue0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lmca:FairValueOptionSecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value22-135.021184031-131.0-25.08474-112.056-10.030
Percentage of GainLossOnInvestments-12.2-13500.0-14.6128.6-46.0-31.693.680.6144.848.4248.9311.120.4-250.0
Percentage of Revenues1.2-6.70.80.61.41.5-6.5-1.13.84.9-5.62.7-0.52.2
Percentage of Revenues lmca:FairValueOptionSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lmca:OtherFinancialInstruments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13.0-85.016-10.0-44.0-18.0-46.09.010.02915-2.0-7.0-4.0
Percentage of GainLossOnInvestments7.2-8500.0-11.1-71.450.618.432.9-29.017.219.0-33.3-11.114.333.3
Percentage of Revenues-0.7-4.20.6-0.4-1.6-0.9-2.30.40.51.90.8-0.1-0.3-0.3
Percentage of Revenues lmca:OtherFinancialInstruments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization lmca:EconomicPerformanceGroup, us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

lmca:LibertyFormulaOneGroup, lmca:Formula


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1643371434441148328450414
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.82.114.215.215.77.416.319.418.8
Percentage of Revenues lmca:LibertyFormulaOneGroup lmca:Formula0.00.00.00.00.00.068.269.670.8

lmca:LibertySiriusXmGroup, lmca:CustomerServiceAndBilling


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value122118123120119113989595
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization762.5274.433.227.627.076.429.921.122.9
Percentage of Revenues6.45.94.74.24.25.64.94.14.3
Percentage of Revenues lmca:LibertySiriusXmGroup lmca:CustomerServiceAndBilling0.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, lmca:OtherCostOfSubscriberServices


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value474463524737343033
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization293.8102.317.012.010.725.010.46.78.0
Percentage of Revenues2.52.22.41.81.71.81.71.31.5
Percentage of Revenues lmca:LibertySiriusXmGroup lmca:OtherCostOfSubscriberServices0.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, lmca:ProgrammingAndContentExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11011812411611610610397105
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization687.5274.433.426.726.371.631.421.625.4
Percentage of Revenues5.85.94.74.14.15.35.14.24.8
Percentage of Revenues lmca:LibertySiriusXmGroup lmca:ProgrammingAndContentExpense0.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, lmca:RevenueShareAndRoyalties


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value587570607592600492337343404
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization3668.81325.6163.6136.4136.1332.4102.776.297.6
Percentage of Revenues30.728.323.220.721.424.516.814.818.4
Percentage of Revenues lmca:LibertySiriusXmGroup lmca:RevenueShareAndRoyalties0.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService

lmca:CustomerServiceAndBilling


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value122118123120119113989595
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization762.5274.433.227.627.076.429.921.122.9
Percentage of Revenues6.45.94.74.24.25.64.94.14.3
Percentage of Revenues lmca:CustomerServiceAndBilling0.00.00.00.00.00.00.00.00.0

lmca:Formula


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1643371434441148328450414
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.82.114.215.215.77.416.319.418.8
Percentage of Revenues lmca:Formula0.00.00.00.00.00.068.269.670.8

lmca:OtherCostOfSubscriberServices


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value474463524737343033
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization293.8102.317.012.010.725.010.46.78.0
Percentage of Revenues2.52.22.41.81.71.81.71.31.5
Percentage of Revenues lmca:OtherCostOfSubscriberServices0.00.00.00.00.00.00.00.00.0

lmca:ProgrammingAndContentExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11011812411611610610397105
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization687.5274.433.426.726.371.631.421.625.4
Percentage of Revenues5.85.94.74.14.15.35.14.24.8
Percentage of Revenues lmca:ProgrammingAndContentExpense0.00.00.00.00.00.00.00.00.0

lmca:RevenueShareAndRoyalties


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value587570607592600492337343404
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization3668.81325.6163.6136.4136.1332.4102.776.297.6
Percentage of Revenues30.728.323.220.721.424.516.814.818.4
Percentage of Revenues lmca:RevenueShareAndRoyalties0.00.00.00.00.00.00.00.00.0

None

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value169517672317234923441812163017841825129016631683171811361048103310384239919631051836889935929856836862842629132914413367
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues88.887.888.582.283.690.181.177.183.085.083.481.580.381.479.374.676.035.182.075.086.077.381.279.080.184.781.677.778.179.7284.625.924.815.2

us-gaap:CostsAndExpenses lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value446679191174716015514779881941793834108134473810310931
Percentage of CostsAndExpenses2.63.73.48.17.43.93.78.78.16.15.311.510.43.33.210.512.911.13.810.710.43.7
Percentage of Revenues2.33.33.06.76.23.53.06.76.75.24.49.48.42.72.67.89.83.93.18.08.92.9
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0187.577.580.8282.1440.0104.9101.7760.0188.999.1102.31175.0237.586.6105.8620.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value160191546601606304510616579232546518583176171612-488.0
Percentage of CostsAndExpenses9.410.823.625.625.916.831.334.531.718.032.830.833.915.51.61.51.2-115.4
Percentage of Revenues8.49.520.821.021.615.125.426.626.315.327.425.127.212.61.31.20.9-40.5
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0106.095.299.0203.595.8103.494.6183.30.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1491151016921557156414371060101310999791029971956922997909892864931837925786
Percentage of CostsAndExpenses88.085.573.066.366.779.365.056.860.275.961.957.755.681.295.188.085.9204.393.986.988.094.0
Percentage of Revenues78.175.064.654.555.871.452.843.850.064.551.647.044.766.175.565.665.371.877.165.275.772.7
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.070.969.076.771.273.370.470.971.376.571.272.272.078.171.882.773.0

None

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value390408534440436402340295303265311324288239242235208201253207199202233209215216216207185154303374133
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues20.420.320.415.415.520.016.912.713.817.515.615.713.517.118.317.015.216.720.916.116.318.721.317.718.521.421.118.617.219.564.96.77.67.5

us-gaap:SellingGeneralAndAdministrativeExpense lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.0222726243032333023426129191618191416171513
Percentage of SellingGeneralAndAdministrativeExpense0.05.45.15.95.57.59.411.29.98.713.518.810.17.96.67.79.17.06.38.27.56.4
Percentage of Revenues0.01.11.00.90.91.51.61.41.41.52.13.01.41.41.21.31.41.21.31.31.21.2
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0100.016.516.582.1210.033.016.5380.088.916.514.5350.0100.014.314.6260.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value404462515146674849405353573614159.020
Percentage of SellingGeneralAndAdministrativeExpense10.310.811.611.611.711.419.716.316.215.117.016.419.815.15.86.44.310.0
Percentage of Revenues2.12.22.41.81.82.33.32.12.22.62.72.62.72.61.11.10.71.7
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.013.97.48.435.19.310.69.337.50.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value350342445363361326241214224202216210202184212202180167217170169172
Percentage of SellingGeneralAndAdministrativeExpense89.783.883.382.582.881.170.972.573.976.269.564.870.177.087.686.086.583.185.882.184.985.1
Percentage of Revenues18.317.017.012.712.916.212.09.210.213.310.810.29.413.216.014.613.213.918.013.213.815.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.016.114.615.614.715.415.215.014.216.315.814.613.918.214.615.116.0

None

us-gaap:LitigationSettlementExpense

us-gaap:LitigationSettlementExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302015-12-312015-09-302015-06-30
Value0.0-16.00.00.00.0250.00.0690.00.0108
Percentage of LitigationSettlementExpense0.0100.00.00.00.0100.00.00.0100.00.00.0100.0
Percentage of Revenues0.0-0.80.00.00.01.20.00.03.10.00.08.8

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value214246302507461200379531374227331382422259273352328781217321171245206249231155189248236160251111018929311194459
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues11.212.211.517.816.49.918.922.917.015.016.618.519.718.620.725.424.064.918.025.014.022.718.821.019.915.318.422.321.920.35.420.018.820.230.120.617.547.2

us-gaap:OperatingIncomeLoss lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-33.0-44.0-45.02134-49.0-28.04535-51.0-68.0-9.0-3.0-33.0-16.01.0-3.0-43.0-22.016-6.0-26.0
Percentage of OperatingIncomeLoss-15.4-17.9-14.94.17.4-24.5-7.48.59.4-22.5-20.5-2.4-0.7-12.7-5.90.3-0.9-5.5-10.15.0-3.5-10.6
Percentage of Revenues-1.7-2.2-1.70.71.2-2.4-1.41.91.6-3.4-3.4-0.4-0.1-2.4-1.20.1-0.2-3.6-1.81.2-0.5-2.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-87.522.519.2-182.1-340.0-4.9-1.7-660.0-88.90.9-2.3-1075.0-137.513.4-5.8-520.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-136.0-152.0-23.03214-58.0-29.0316.0-118.024-17.033-80.0-17.0-16.0-12.0488
Percentage of OperatingIncomeLoss-63.6-61.8-7.66.33.0-29.0-7.75.81.6-52.07.3-4.57.8-30.9-6.2-4.5-3.762.5
Percentage of Revenues-7.1-7.6-0.91.10.5-2.9-1.41.30.3-7.81.2-0.81.5-5.7-1.3-1.2-0.940.5
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-6.04.81.0-103.54.2-3.45.4-83.30.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value383442370454413307436455333396375408392372306367343336261328194290
Percentage of OperatingIncomeLoss179.0179.7122.589.589.6153.5115.085.789.0174.4113.3106.892.9143.6112.1104.3104.643.0120.3102.2113.5118.4
Percentage of Revenues20.122.014.115.914.715.321.719.715.126.118.819.818.326.723.226.525.127.921.625.515.926.8
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.029.131.023.328.826.729.629.128.723.528.827.828.021.928.217.327.0

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value16316416216916715915315015315014315914914090989084848483777070625354392811271.02.03.0
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.58.16.25.96.07.97.66.57.09.97.27.77.010.06.87.16.67.07.06.56.87.16.45.95.35.25.33.52.61.45.80.20.40.7

us-gaap:InterestExpense lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-12-312015-09-302015-06-30
Value6.07.07.06.07.07.07.06.07.06.06.07.02.0-1.01.01.0
Percentage of InterestExpense3.74.34.33.64.24.44.64.04.64.04.24.41.3-1.21.21.2
Percentage of Revenues0.30.30.30.20.20.30.30.30.30.40.30.30.1-0.10.10.1
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.021.93.03.821.430.03.81.1-6.20.81.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value37464648515049494747455762567.05.04.03.0
Percentage of InterestExpense22.728.028.428.430.531.432.032.730.731.331.535.841.640.07.85.14.43.6
Percentage of Revenues1.92.31.81.71.82.52.42.12.13.12.32.82.94.00.50.40.30.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.010.27.68.041.27.911.410.158.30.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value12011110911510910297959997929585848293868178807673
Percentage of InterestExpense73.667.767.368.065.364.263.463.364.764.764.359.757.060.091.194.995.696.492.995.291.694.8
Percentage of Revenues6.35.54.24.03.95.14.84.14.56.44.64.64.06.06.26.76.36.76.56.26.26.8
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.06.56.56.97.16.66.96.36.56.37.37.06.86.56.96.86.8

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value141727-47.0218.04110.0216.06.0-11.0-4.017-21.05.05.07.0-13.04.06.02.0-8.0-13.0-2.0-38.0-42.0-67.0-1.0-5.0-18.0498.02.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.70.81.0-1.60.70.42.00.41.00.40.3-0.5-0.21.2-1.60.40.40.6-1.10.30.50.2-0.7-1.1-0.2-3.8-4.1-6.0-0.1-0.6-3.98.81.50.5

us-gaap:OtherNonoperatingIncomeExpense lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1.0-1.01.00.01.0330.01.01.0-3.01.02.03.01.0-1.0
Percentage of OtherNonoperatingIncomeExpense7.1-5.93.7-0.04.880.50.04.816.7-50.0-9.1-50.017.620.0-20.0
Percentage of Revenues0.1-0.00.00.00.01.60.00.00.1-0.20.00.10.20.1-0.1
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.0103.10.00.53.6-15.00.51.160.00.9-0.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9.05.0224.0145.06.04.08.00.07.01.08.06.03.06.06.0
Percentage of OtherNonoperatingIncomeExpense64.329.481.5-8.566.762.514.640.038.10.0-63.6-25.047.1-28.660.0120.085.7
Percentage of Revenues0.50.20.80.10.50.20.30.20.40.00.30.00.60.50.20.40.5
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.01.20.61.40.01.40.28.30.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.0134.0-51.06.03.02.06.0125.09.0-19.0-7.06.0-27.01.00.01.0
Percentage of OtherNonoperatingIncomeExpense28.676.514.8108.528.637.54.960.057.183.3150.0172.7175.035.3128.620.00.014.3
Percentage of Revenues0.20.60.2-1.80.20.10.10.30.50.30.5-0.9-0.30.4-2.00.10.00.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.00.10.40.80.40.6-1.4-0.50.5-2.10.10.00.1

None

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value45677476766547465346
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.43.32.82.72.73.22.32.02.43.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

lmca:CustomerServiceAndBilling


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.02.01.01.01.01.01.01.01.01.0
Percentage of AllocatedShareBasedCompensationExpense2.23.01.41.31.31.52.12.21.92.2
Percentage of Revenues0.10.10.00.00.00.00.00.00.00.1
Percentage of Revenues lmca:CustomerServiceAndBilling0.00.00.00.00.00.00.00.00.00.0

lmca:OtherCostOfSubscriberServices


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.01.05.01.02.01.01.01.02.01.0
Percentage of AllocatedShareBasedCompensationExpense4.41.56.81.32.61.52.12.23.82.2
Percentage of Revenues0.10.00.20.00.10.00.00.00.10.1
Percentage of Revenues lmca:OtherCostOfSubscriberServices0.00.00.00.00.00.00.00.00.00.0

lmca:ProgrammingAndContentExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.08.08.08.07.07.07.03.010.08.0
Percentage of AllocatedShareBasedCompensationExpense15.611.910.810.59.210.814.96.518.917.4
Percentage of Revenues0.40.40.30.30.20.30.30.10.50.5
Percentage of Revenues lmca:ProgrammingAndContentExpense0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingExpense


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9.01115139.05.04.04.0
Percentage of AllocatedShareBasedCompensationExpense20.016.419.717.113.810.97.58.7
Percentage of Revenues0.50.50.50.50.40.20.20.3
Percentage of Revenues us-gaap:OperatingExpense0.00.00.00.00.00.00.00.0

us-gaap:SellingGeneralAndAdministrativeExpenses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value26454851534734363632
Percentage of AllocatedShareBasedCompensationExpense57.867.264.967.169.772.372.378.367.969.6
Percentage of Revenues1.42.21.81.81.92.31.71.61.62.1
Percentage of Revenues us-gaap:SellingGeneralAndAdministrativeExpenses0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-308.038-40.0360262-69.0734183222288638523612020330322968414970134105165150181-35.065421026277494132501237112
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-16.11.9-1.512.69.3-3.43.618.114.615.04.318.611.08.615.421.916.856.812.35.511.09.715.112.715.6-3.563.818.924.3982.188.445.0230.425.5

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-47.038-60.01931-82.021294.0-58.0-43.041-5.0-55.0-42.0-21.025-41.0-18.017-5.0-24.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest15.3100.0150.05.311.8118.828.86.91.2-25.4-50.010.6-2.1-45.8-20.7-6.910.9-6.0-12.124.3-3.7-22.9
Percentage of Revenues-2.51.9-2.30.71.1-4.11.01.30.2-3.8-2.22.0-0.2-3.9-3.2-1.51.8-3.4-1.51.3-0.4-2.2
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.065.614.52.2-207.1-215.022.2-2.8-1100.0-233.3-19.319.1-1025.0-112.514.3-4.9-480.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-227.0-368.0-192.070-87.0-192.0-210.07611-77.0-82.0-46.0-54.0-122.04647-55.0462
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest73.7-968.4480.019.4-33.2278.3-287.718.23.4-33.8-95.3-11.9-22.9-101.722.715.5-24.067.5
Percentage of Revenues-11.9-18.3-7.32.5-3.1-9.5-10.53.30.5-5.1-4.1-2.2-2.5-8.73.53.4-4.038.4
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-43.711.71.9-67.5-14.4-9.2-8.8-127.10.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-34.0368212271318205262313307363211390295297199277259263185249121210
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest11.0968.4-530.075.3121.4-297.1358.974.995.3159.2245.3101.3125.0247.598.091.4113.138.5124.2355.790.3200.0
Percentage of Revenues-1.818.38.19.511.310.213.013.514.023.910.618.913.821.315.120.019.021.815.319.49.919.4
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.017.521.321.426.415.028.321.923.015.321.721.021.915.521.410.819.5

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-308.038-40.0360262-69.0734183222288638523612020330322968414970134105165150181-35.08560.02627749120.01237112
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0
Percentage of Revenues-16.11.9-1.512.69.3-3.43.618.114.615.04.318.611.08.615.421.916.856.812.35.511.09.715.112.715.6-3.583.50.024.3982.12.60.0230.425.5

None

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-522.0-208.0-342.0-147.0-199.0-269.0-306.0-113.0-52.01.0-245.03.0-186.0-139.0-70.0-49.0-99.0-97.0-68.0-251.0-37.0-140.0-41.0-99.0-50.0-190.0465-38.0267589672401235144
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-27.3-10.3-13.1-5.1-7.1-13.4-15.2-4.9-2.40.1-12.30.1-8.7-10.0-5.3-3.5-7.2-8.1-5.6-19.5-3.0-13.0-3.7-8.4-4.3-18.845.4-3.42.4961.914.343.2230.032.7

us-gaap:NonoperatingIncomeExpense lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-14.082-15.0-2.0-3.0-33.049-16.0-31.0-7.02550-2.0-22.0-26.0-22.0282.04.01.01.02.0
Percentage of NonoperatingIncomeExpense2.7-39.44.41.41.512.3-16.014.259.6-700.0-10.21666.71.115.837.144.9-28.3-2.1-5.9-0.4-2.7-1.4
Percentage of Revenues-0.74.1-0.6-0.1-0.1-1.62.4-0.7-1.4-0.51.32.4-0.1-1.6-2.0-1.62.00.20.30.10.10.2
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0153.1-8.0-17.0-25.0125.027.0-1.1-440.0-144.4-20.221.450.025.00.81.040.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-91.0-216.0-169.038-101.0-134.0-181.0455.041-106.0-29.0-87.0-42.06363-43.0-26.0
Percentage of NonoperatingIncomeExpense17.4103.849.4-25.950.849.859.2-39.8-9.64100.043.3-966.746.830.2-90.0-128.643.426.8
Percentage of Revenues-4.8-10.7-6.51.3-3.6-6.7-9.01.90.22.7-5.3-1.4-4.1-3.04.84.5-3.1-2.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-37.67.00.936.0-18.6-5.8-14.1-43.80.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-417.0-74.0-158.0-183.0-95.0-102.0-174.0-142.0-26.0-33.0-164.0-18.0-97.0-75.0-107.0-90.0-84.0-73.0-76.0-79.0-73.0-80.0
Percentage of NonoperatingIncomeExpense79.935.646.2124.547.737.956.9125.750.0-3300.066.9-600.052.254.0152.9183.784.875.3111.831.5197.357.1
Percentage of Revenues-21.8-3.7-6.0-6.4-3.4-5.1-8.7-6.1-1.2-2.2-8.2-0.9-4.5-5.4-8.1-6.5-6.1-6.1-6.3-6.2-6.0-7.4
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-11.6-9.7-1.8-2.4-11.7-1.3-7.2-5.8-8.2-7.1-6.8-6.1-6.4-6.8-6.5-7.4

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-46.036-60.098705842526715-1343.01248076171348925760293586356375-107.03594104-361.0-104.08837040211
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.41.8-2.33.42.52.92.12.23.01.0-67.46.03.75.41.39.76.521.35.02.32.98.03.25.36.5-10.63.48.59.6-45.8-22.315.968.99.121.7

us-gaap:IncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-9.0-15.0-16.07.05.0-11.0-4.0-12.07.0-6.0-46.019-3.0-6.0-2.01.00.0-16.0-7.07.0-1.0-9.0
Percentage of IncomeTaxExpenseBenefit19.6-41.726.77.17.1-19.0-9.5-23.110.4-40.03.415.3-3.8-7.9-11.80.70.0-6.2-11.724.1-2.9-10.5
Percentage of Revenues-0.5-0.7-0.60.20.2-0.5-0.2-0.50.3-0.4-2.30.9-0.1-0.4-0.20.10.0-1.3-0.60.5-0.1-0.8
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-12.5-6.03.8-21.4-230.010.3-1.7-120.0-11.10.90.0-400.0-43.85.9-1.0-180.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-27.0-25.0-64.028-10.0-44.0-25.0341.0-60.0-497.0-11.0-27.0-26.06.06.0-12.0171
Percentage of IncomeTaxExpenseBenefit58.7-69.4106.728.6-14.3-75.9-59.565.41.5-400.037.0-8.9-33.8-34.235.34.5-13.566.5
Percentage of Revenues-1.4-1.2-2.41.0-0.4-2.2-1.21.50.0-4.0-24.9-0.5-1.3-1.90.50.4-0.914.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-5.25.30.2-52.6-87.2-2.2-4.4-27.10.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-10.07620637511371305981-800.01161101081312799100709730125
Percentage of IncomeTaxExpenseBenefit21.7211.1-33.364.3107.1194.8169.057.788.1540.059.693.5137.5142.176.594.8111.238.9116.7334.585.7145.3
Percentage of Revenues-0.53.80.82.22.75.63.51.32.75.3-40.15.65.17.71.09.27.28.35.87.62.511.6
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.04.72.04.15.9-57.08.48.28.31.010.08.08.35.98.32.711.6

None

us-gaap:ProfitLoss

us-gaap:ProfitLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-262.02.020262192-127.0313662552131429261156441861691404278941991913087106726191161588110103220938151
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-13.70.10.89.26.8-6.31.515.811.614.071.712.67.33.214.112.210.235.57.43.28.11.811.97.39.17.160.410.514.71027.922.139.6174.734.3

us-gaap:ProfitLoss lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-38.053-44.01226-71.02541-3.0-52.03.022-2.0-49.0-40.0-22.025-25.0-11.010.0-4.0-15.0
Percentage of ProfitLoss14.52650.0-220.04.613.555.980.611.2-1.2-24.40.28.4-1.3-111.4-21.5-13.017.9-5.9-12.424.4-4.0-78.9
Percentage of Revenues-2.02.6-1.70.40.9-3.51.21.8-0.1-3.40.21.1-0.1-3.5-3.0-1.61.8-2.1-0.90.8-0.3-1.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.078.120.5-1.6-185.715.011.9-1.1-980.0-222.2-20.219.1-625.0-68.88.4-3.9-300.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-200.0-343.0-128.042-77.0-148.0-185.04210.0-17.0415-35.0-27.0-96.04041-43.0291
Percentage of ProfitLoss76.3-17150.0-640.016.0-40.1116.5-596.811.53.9-8.029.0-13.4-17.3-218.221.524.3-30.768.1
Percentage of Revenues-10.5-17.0-4.91.5-2.7-7.4-9.21.80.5-1.120.8-1.7-1.3-6.93.03.0-3.124.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-38.56.51.7-14.972.8-7.0-4.4-100.00.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-24.02921922082439219128324828210112741851891861501601631151529185
Percentage of ProfitLoss9.214600.0960.079.4126.6-72.4616.177.397.3132.470.7105.0118.6429.5100.088.8114.338.2129.2370.791.9447.4
Percentage of Revenues-1.314.57.37.38.74.69.512.211.318.650.713.38.613.514.110.811.713.59.511.87.47.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.012.819.317.320.572.019.913.714.614.311.813.013.69.613.08.17.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value64786569763171988382316936265675560624563383857
Percentage of ProfitLoss-24.43900.0325.026.339.6-24.4229.026.832.538.522.135.639.7147.736.032.542.914.550.6153.738.4200.043.8
Percentage of Revenues3.43.92.52.42.71.53.54.23.85.415.84.52.94.75.14.04.45.13.74.93.13.55.2
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-326.0-76.0-45.0193116-158.0-40.0268172131111316894-21.01191168036544-22.061-19.073
Percentage of ProfitLoss124.4-3800.0-225.073.760.4124.4-129.073.267.561.577.964.460.3-47.764.068.657.185.549.4-53.761.6-100.056.2
Percentage of Revenues-17.1-3.8-1.76.84.1-7.9-2.011.67.88.655.88.14.4-1.59.08.45.930.33.6-1.75.0-1.86.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value15-37.09.0-8.010.09.0-23.010.0-2.04.0-4.0226.0-1.0-2.0-1.0-2.0-9.0-31.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.8-1.80.3-0.30.40.4-1.10.4-0.10.3-0.21.10.3-0.1-0.1-0.1-0.2-0.7-2.5

None

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value4014330-38.021-2.030-3.0-33.0-9.0-2.025-9.0-4.0-5.08.0-6.0-10.0-26.0-7.0-10.0-9.02.00.08.011-2.0-28.01.0-15.0-2.0-1.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.17.11.1-1.30.7-0.11.5-0.1-1.5-0.6-0.11.2-0.7-0.3-0.40.7-0.5-0.8-2.1-0.6-0.9-0.80.20.00.81.0-0.2-3.50.2-2.7-0.4-0.2

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-03-31
Value3615328-36.018-5.037-6.0-30.0-6.0-1.018-8.05.0
Percentage of OtherComprehensiveIncomeLossNetOfTax90.0107.093.394.785.7250.0123.3200.090.966.750.072.088.962.5
Percentage of Revenues1.97.61.1-1.30.6-0.21.8-0.3-1.4-0.4-0.10.9-0.60.4
Percentage of Revenues us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value4.0-10.02.0-2.03.03.0-7.03.0-3.0-3.0-1.07.0-1.0-1.00.03.0-1.0-4.0
Percentage of OtherComprehensiveIncomeLossNetOfTax10.0-7.06.75.314.3-150.0-23.3-100.09.133.350.028.011.125.0-0.037.516.740.0
Percentage of Revenues0.2-0.50.1-0.10.10.1-0.30.1-0.1-0.2-0.10.3-0.1-0.10.00.2-0.1-0.3
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value68686767793464101807931593626566546065445924385754565067346248-3.0-1.01.01.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.63.42.62.32.81.73.24.43.65.215.84.52.94.75.03.94.45.43.64.62.03.55.24.64.84.96.53.15.86.1-0.6-0.20.20.2

None

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-222.014550224213-129.0613632222041427286168441771651354358331731212078108726271271568082104205936150
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.67.21.97.87.6-6.43.015.710.113.471.613.87.93.213.411.99.936.16.92.46.01.111.06.69.37.161.211.414.51024.322.336.9174.334.1

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-326.0-76.0-45.0193116-158.0-40.0268172131111316894-21.01191158036544-22.061-19.07333502255276968062106221937150
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-17.1-3.8-1.76.84.1-7.9-2.011.67.88.655.88.14.4-1.59.08.35.930.33.6-1.75.0-1.86.72.84.32.253.96.88.91021.822.739.8174.534.1

us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-38.053-44.01226-71.01841-2.0-52.04.022-2.0-49.0-40.0-22.032-25.0-11.010.0-4.0-15.0
Percentage of NetIncomeLoss11.7-69.797.86.222.444.9-45.015.3-1.2-39.70.413.1-2.1233.3-33.6-19.140.0-6.8-25.0-45.5-6.678.9
Percentage of Revenues-2.02.6-1.70.40.9-3.50.91.8-0.1-3.40.21.1-0.1-3.5-3.0-1.62.3-2.1-0.90.8-0.3-1.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.056.220.5-1.1-185.720.011.9-1.1-980.0-222.2-20.224.4-625.0-68.88.4-3.9-300.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-200.0-343.0-127.041-77.0-148.0-184.0429.0-17.0415-37.0-27.0-96.04041-45.0291
Percentage of NetIncomeLoss61.3451.3282.221.2-66.493.7460.015.75.2-13.037.3-22.0-28.7457.133.635.7-56.279.7
Percentage of Revenues-10.5-17.0-4.81.4-2.7-7.4-9.21.80.4-1.120.8-1.8-1.3-6.93.03.0-3.324.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-38.36.51.5-14.972.8-7.4-4.4-100.00.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-88.021412614016761126185165200694183123124119968210170895347
Percentage of NetIncomeLoss27.0-281.6-280.072.5144.0-38.6-315.069.095.9152.762.4108.9130.9-590.5100.083.5102.527.7159.1-404.586.9-247.4
Percentage of Revenues-4.610.64.84.96.03.06.38.07.513.234.88.95.78.99.06.96.08.45.86.94.34.3
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.08.412.611.514.549.413.39.19.69.17.56.68.45.97.64.74.4

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-290.077-17.0157134-163.0-3.02621421251112193106-21.01111117537039-28.049-26.06324522256093948034107206935149
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-15.23.8-0.65.54.8-8.1-0.111.36.58.255.89.35.0-1.58.48.05.530.73.2-2.24.0-2.45.82.04.52.254.68.48.71018.322.937.1174.133.9

us-gaap:ComprehensiveIncomeNetOfTax lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-39.047-45.01327-69.01840-1.0-55.04.022-3.0-51.0-41.0-22.033
Percentage of ComprehensiveIncomeNetOfTax13.461.0264.78.320.142.3-600.015.3-0.7-44.00.411.4-2.8242.9-36.9-19.844.0
Percentage of Revenues-2.02.3-1.70.51.0-3.40.91.7-0.0-3.60.21.1-0.1-3.7-3.1-1.62.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.056.220.0-0.5-196.420.011.9-1.7-1020.0-227.8-20.225.2

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-198.0-244.0-110.012-68.0-161.0-140.031-14.0-18.0416-35.0-20.0-94.03337-48.0
Percentage of ComprehensiveIncomeNetOfTax68.3-316.9647.17.6-50.798.84666.711.8-9.9-14.437.4-18.1-18.9447.629.733.3-64.0
Percentage of Revenues-10.4-12.1-4.20.4-2.4-8.0-7.01.3-0.6-1.220.9-1.7-0.9-6.72.52.7-3.5
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-29.14.8-2.4-15.873.0-7.0-3.2-97.90.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-53.0274138132175671191911571986922061291241199680
Percentage of ComprehensiveIncomeNetOfTax18.3355.8-811.884.1130.6-41.1-3966.772.9110.6158.462.2106.7121.7-590.5107.286.5106.7
Percentage of Revenues-2.813.65.34.66.23.35.98.37.113.134.710.06.08.99.06.95.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.08.013.011.014.449.314.99.69.69.17.56.5

None

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic lmca:EconomicPerformanceGroup

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

lmca:LibertyBravesGroup


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value53-44.01226-71.01841-2.0-52.04.022-2.0-49.0-22.032
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.6-1.70.40.9-3.50.91.8-0.1-3.40.21.1-0.1-3.5-1.60.0
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.056.220.5-1.1-185.720.011.9-1.1-980.0-20.20.0

lmca:LibertySiriusXmGroup


None
Period End2020-03-312019-03-31
Value21461
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic403.8-85.9
Percentage of Revenues10.63.0
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.0

None

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted lmca:EconomicPerformanceGroup

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value-31.0-42.0-28.010.028-45.0-4.05426-47.0-24.0341.0-21.03.05.0
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.6-2.1-1.10.41.0-2.2-0.22.31.2-3.1-1.21.60.0-1.50.20.0
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-12.527.014.3-167.9-120.018.40.6-420.02.80.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302019-06-30
Value-172.0-77.0
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted554.8-275.0
Percentage of Revenues-9.0-2.7
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value-92.018316761
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted296.8-435.7596.4-135.6
Percentage of Revenues-4.89.16.03.0
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.0

None

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value6478656976317198838231693626567546062456338385754565067406248-3.0-1.01.01.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.43.92.52.42.71.53.54.23.85.415.84.52.94.75.13.94.45.13.74.93.13.55.24.64.84.96.53.65.86.1-0.6-0.20.20.2

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest lmca:EconomicPerformanceGroup

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value647866687631659883823179162656754606245633838
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0101.598.6100.0100.091.5100.0100.0100.0100.397.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.43.92.52.42.71.53.24.23.85.415.94.42.94.75.13.94.45.13.74.93.13.5
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.04.36.75.86.022.66.64.65.05.14.24.95.23.85.43.43.5

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value46208439184418943645437004391040828416244180742540419964185341384410023137731563308893032629798306803111131430312073384534075336933454233943338843239683257719
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value17021715159315941549147918051913193919471866180317341658154813691285999849
Percentage of Assets3.73.93.63.73.53.44.44.64.64.64.44.34.24.04.94.34.23.32.8
Percentage of Assets3.73.93.63.73.53.44.44.64.64.64.44.34.24.04.94.34.23.32.8
Percentage of Assets lmca:LibertyBravesGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value115831136211505113611129811367109571148311589118421180212193122541248629951952
Percentage of Assets25.125.926.026.025.925.926.827.627.727.828.129.129.630.59.56.6
Percentage of Assets25.125.926.026.025.925.926.827.627.727.828.129.129.630.59.56.6
Percentage of Assets lmca:LibertyFormulaOneGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value33499311083142131004311623137328292284762851428958285302811727643271012705127432273362698327001
Percentage of Assets72.570.871.171.071.371.469.368.468.268.167.967.266.866.186.286.988.589.090.6
Percentage of Assets72.570.871.171.071.371.469.368.468.268.167.967.266.866.186.286.988.589.090.6
Percentage of Assets lmca:LibertySiriusXmGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems

lmca:LibertyBravesGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value17021715159415491479
Percentage of Assets3.73.93.73.53.4
Percentage of Assets3.73.93.73.53.4
Percentage of Assets lmca:LibertyBravesGroup us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value23271678222521282107
Percentage of Assets5.03.85.14.94.8
Percentage of Assets5.03.85.14.94.8
Percentage of Assets lmca:LibertyFormulaOneGroup us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value1246423200159529
Percentage of Assets2.71.00.50.41.2
Percentage of Assets2.71.00.50.41.2
Percentage of Assets lmca:LibertySiriusXmGroup us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0

us-gaap:Assets lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

lmca:LibertyFormulaOneGroup, us-gaap:OperatingSegments, lmca:FormulaOne


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value92569684913691709260
Percentage of Assets20.022.120.921.021.1
Percentage of Assets20.022.120.921.021.1
Percentage of Assets lmca:LibertyFormulaOneGroup us-gaap:OperatingSegments lmca:FormulaOne100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value3225330685308043100330844
Percentage of Assets69.869.970.670.970.2
Percentage of Assets69.869.970.670.970.2
Percentage of Assets lmca:LibertySiriusXmGroup us-gaap:OperatingSegments lmca:SiriusXmHoldings100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-576.0-267.0-330.0-314.0-309.0-309.0-226.0-248.0-202.0
Percentage of Assets-1.2-0.6-0.7-0.7-0.7-0.7-0.6-0.6-0.5
Percentage of Assets-1.2-0.6-0.7-0.7-0.7-0.7-0.6-0.6-0.5
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2412022216222642146721219207151913019255193422006519422203992030020226136611357012838122411166712238121521179011031112511113898161066099649571764518932470
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.250.650.449.248.647.246.946.346.347.246.248.749.149.343.543.041.640.439.239.939.137.535.333.232.729.130.929.428.223.622.732.0

us-gaap:Liabilities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value133512881215117611461109136714911558156514391433138613081148929824663498
Percentage of Liabilities5.55.85.55.55.45.47.17.78.17.87.47.06.86.58.46.86.45.44.3
Percentage of Assets2.92.92.72.72.62.53.33.63.73.73.43.43.33.23.72.92.72.21.7
Percentage of Assets lmca:LibertyBravesGroup78.475.176.373.874.075.075.777.980.480.477.179.579.978.974.267.964.166.458.7

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value496763646264600259525972540457975939618461316984734279821710969
Percentage of Liabilities20.628.628.128.028.128.828.230.130.730.831.634.236.239.512.58.3
Percentage of Assets10.714.514.213.813.613.613.213.914.214.514.616.717.719.55.43.3
Percentage of Assets lmca:LibertyFormulaOneGroup42.956.054.452.852.752.549.350.551.252.251.957.359.963.957.149.6

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value18394148311511514603144301394312585122151208012523120541224211819111791102011133109661058210204
Percentage of Liabilities76.366.867.968.068.067.365.863.462.562.462.160.058.255.380.782.085.486.487.5
Percentage of Assets39.833.834.233.533.031.830.829.328.929.428.729.228.627.335.135.335.534.934.2
Percentage of Assets lmca:LibertySiriusXmGroup54.947.748.147.146.344.444.542.942.443.242.343.542.841.240.740.640.139.237.8

us-gaap:Liabilities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-576.0-267.0-330.0-314.0-309.0-309.0-226.0-248.0-202.0
Percentage of Liabilities-2.4-1.2-1.5-1.5-1.5-1.5-1.2-1.3-1.0
Percentage of Assets-1.2-0.6-0.7-0.7-0.7-0.7-0.6-0.6-0.5
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value46208439184418943645437004391040828416244180742540419964185341384410023137731563308893032629798306803111131430312073384534075336933454233943338843239683257719
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value17021715159315941549147918051913193919471866180317341658154813691285999849
Percentage of LiabilitiesAndStockholdersEquity3.73.93.63.73.53.44.44.64.64.64.44.34.24.04.94.34.23.32.8
Percentage of Assets3.73.93.63.73.53.44.44.64.64.64.44.34.24.04.94.34.23.32.8
Percentage of Assets lmca:LibertyBravesGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value115831136211505113611129811367109571148311589118421180212193122541248629951952
Percentage of LiabilitiesAndStockholdersEquity25.125.926.026.025.925.926.827.627.727.828.129.129.630.59.56.6
Percentage of Assets25.125.926.026.025.925.926.827.627.727.828.129.129.630.59.56.6
Percentage of Assets lmca:LibertyFormulaOneGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value33499311083142131004311623137328292284762851428958285302811727643271012705127432273362698327001
Percentage of LiabilitiesAndStockholdersEquity72.570.871.171.071.371.469.368.468.268.167.967.266.866.186.286.988.589.090.6
Percentage of Assets72.570.871.171.071.371.469.368.468.268.167.967.266.866.186.286.988.589.090.6
Percentage of Assets lmca:LibertySiriusXmGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-576.0-267.0-330.0-314.0-309.0-309.0-226.0-248.0-202.0
Percentage of LiabilitiesAndStockholdersEquity-1.2-0.6-0.7-0.7-0.7-0.7-0.6-0.6-0.5
Percentage of Assets-1.2-0.6-0.7-0.7-0.7-0.7-0.6-0.6-0.5
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value16610161671629516517165961670716595168601688816977169431583915448149801175611705116471138110933109941107511308113981402113976141411408114419143761427764405259
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.936.836.937.838.038.040.640.540.439.940.337.837.336.537.537.137.737.536.735.835.636.036.541.441.042.040.842.542.444.177.468.1

us-gaap:StockholdersEquity lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value367427378426411378446417376377413355333335385425447327351
Percentage of StockholdersEquity2.22.62.32.62.52.32.72.52.22.22.42.22.22.23.33.63.82.93.2
Percentage of Assets0.81.00.91.00.90.91.11.00.90.91.00.80.80.81.21.31.41.11.2
Percentage of Assets lmca:LibertyBravesGroup21.624.923.726.726.525.624.721.819.419.422.119.719.220.224.931.034.832.741.3

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value661349955239535653435392555056845648565556695207491245041286983
Percentage of StockholdersEquity39.830.932.232.432.232.333.433.733.433.333.532.931.830.110.99.0
Percentage of Assets14.311.411.912.312.212.313.613.713.513.313.512.411.911.04.13.3
Percentage of Assets lmca:LibertyFormulaOneGroup57.144.045.547.147.347.450.749.548.747.848.042.740.136.142.950.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value9630107451067810735108421093710599107591086410945108611027710203101411008510026998097069599
Percentage of StockholdersEquity58.066.565.565.065.365.563.963.864.364.564.164.966.067.785.885.785.785.387.8
Percentage of Assets20.824.524.224.624.824.926.025.826.025.725.924.624.724.732.131.832.332.032.2
Percentage of Assets lmca:LibertySiriusXmGroup28.734.534.034.634.834.937.537.838.137.838.136.636.937.437.336.536.536.035.6

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value5381298924051936193117321082124113271919176314351433170810291472176811646912110247827372344217122741801249424812365345822113860
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.66.85.44.44.43.92.73.03.24.54.23.43.54.23.34.75.73.82.36.98.08.77.56.46.75.37.27.37.010.726.650.0

us-gaap:AssetsCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value3663772672932542232572592692762202032091521391642247632
Percentage of AssetsCurrent6.812.611.115.113.212.923.820.920.314.412.514.114.68.913.511.112.76.54.6
Percentage of Assets0.80.90.60.70.60.50.60.60.60.60.50.50.50.40.40.50.70.30.1
Percentage of Assets lmca:LibertyBravesGroup21.522.016.818.416.415.114.213.513.914.211.811.312.19.29.012.017.47.63.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value2577138374865357456631040846756347957559878117597
Percentage of AssetsCurrent47.946.331.133.729.732.728.732.935.229.327.240.141.745.717.014.0
Percentage of Assets5.63.11.71.51.31.30.81.01.11.31.11.41.41.90.60.3
Percentage of Assets lmca:LibertyFormulaOneGroup22.212.26.55.75.15.02.83.64.04.84.14.74.96.35.85.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2648122913909901103943515574591108010646576267757161080983562562
Percentage of AssetsCurrent49.241.157.851.157.154.447.646.344.556.360.445.843.745.469.673.455.648.381.3
Percentage of Assets5.72.83.12.32.52.11.31.41.42.52.51.61.51.92.33.43.21.91.9
Percentage of Assets lmca:LibertySiriusXmGroup7.94.04.43.23.53.01.82.02.13.73.72.32.32.92.63.93.62.12.1

us-gaap:AssetsCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-30
Value-210.0
Percentage of AssetsCurrent-3.9
Percentage of Assets-0.5
Percentage of Assets srt:ConsolidationEliminations36.5

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302010-12-312009-12-31
Value399918011222694697633358355485104210297837441071562940122960220158879011726813775663771088117193719001353323646207084120903951
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.74.12.81.61.61.40.90.91.22.42.51.91.82.61.83.04.02.00.71.92.53.72.21.11.71.13.13.42.85.916.30.00.026.80.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity, lmca:EconomicPerformanceGroup

lmca:Anlbc, lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2302415957419740447855
Percentage of CashAndCashEquivalentsAtCarryingValue5.813.44.88.25.915.311.212.416.15.3
Percentage of Assets0.50.50.10.10.10.20.10.10.20.1
Percentage of Assets lmca:Anlbc lmca:LibertyBravesGroup0.00.00.00.00.00.00.00.00.00.0

lmca:FormulaOne, lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3241011402354276260304589140165274297432
Percentage of CashAndCashEquivalentsAtCarryingValue8.156.132.951.039.641.18.412.718.413.416.035.039.940.3
Percentage of Assets0.72.30.90.80.60.60.10.10.20.30.40.70.71.1
Percentage of Assets lmca:FormulaOne lmca:LibertyFormulaOneGroup0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lmca:SiriusXmHoldings, lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1770401067921562
Percentage of CashAndCashEquivalentsAtCarryingValue44.32.28.711.430.89.8
Percentage of Assets3.80.10.20.20.50.1
Percentage of Assets lmca:SiriusXmHoldings lmca:LibertySiriusXmGroup0.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3083211421421271631077811311413212912811510710914944133134191157
Percentage of CashAndCashEquivalentsAtCarryingValue7.717.811.620.518.225.829.922.023.310.912.816.517.210.719.011.612.17.36.55.34.31.61.65.2
Percentage of Assets0.70.70.30.30.30.40.30.20.30.30.30.30.30.30.30.30.50.10.00.10.10.10.00.2
Percentage of Assets lmca:LibertyBravesGroup18.118.78.98.98.211.05.94.15.85.97.17.27.46.96.98.011.64.41.50.00.00.00.00.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value1767109458741933437216015119827028242044362616822055445676522896
Percentage of CashAndCashEquivalentsAtCarryingValue44.260.748.060.447.958.844.742.540.825.927.453.659.558.529.923.445.175.737.876.782.4
Percentage of Assets3.82.51.31.00.80.80.40.40.50.60.71.01.11.50.50.71.81.50.31.72.6
Percentage of Assets lmca:LibertyFormulaOneGroup15.39.65.13.73.03.31.51.31.72.32.43.43.65.05.60.00.00.03.90.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value19243864931332369891126174658615234173330287611526102112153294482148135
Percentage of CashAndCashEquivalentsAtCarryingValue48.121.440.319.233.915.525.435.535.963.159.829.923.330.851.165.042.816.955.726.037.241.121.712.4
Percentage of Assets4.20.91.10.30.50.20.20.30.41.51.50.60.40.80.91.91.70.30.40.50.91.50.50.4
Percentage of Assets lmca:LibertySiriusXmGroup5.71.21.60.40.80.30.30.40.62.32.20.80.61.21.12.21.90.40.40.00.00.00.00.0

None

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value673700767778849728364440428394358353363280240274276244247278332228235243240204206225259237286288
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.61.71.81.91.70.91.11.00.90.90.80.90.70.80.90.90.80.80.91.10.70.80.70.70.60.60.70.80.73.43.7

us-gaap:ReceivablesNetCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value293028498326214167803251599.0153948129.0
Percentage of ReceivablesNetCurrent4.34.33.76.39.83.65.89.315.720.38.914.416.33.26.214.217.44.93.6
Percentage of Assets0.10.10.10.10.20.10.10.10.20.20.10.10.10.00.00.10.20.00.0
Percentage of Assets lmca:LibertyBravesGroup1.71.71.83.15.41.81.22.13.54.11.72.83.40.51.02.83.71.21.1

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value14766699713811011015311469847770372.03.0
Percentage of ReceivablesNetCurrent21.89.49.012.516.315.130.234.826.617.523.521.819.313.20.81.2
Percentage of Assets0.30.20.20.20.30.30.30.40.30.20.20.20.20.10.00.0
Percentage of Assets lmca:LibertyFormulaOneGroup1.30.60.60.91.21.01.01.31.00.60.70.60.60.30.10.2

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value497604670632628592233246247245242225234234223233225228235
Percentage of ReceivablesNetCurrent73.886.387.481.274.081.364.055.957.762.267.663.764.583.692.985.081.593.495.1
Percentage of Assets1.11.41.51.41.41.30.60.60.60.60.60.50.60.60.70.70.70.80.8
Percentage of Assets lmca:LibertySiriusXmGroup1.51.92.12.02.01.90.80.90.90.80.80.80.80.90.80.80.80.80.9

None

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value70948841646438537136044641448337629932635722725826325722838534829829834030529028420723030314845
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.10.91.10.90.80.91.11.01.10.90.70.80.90.70.80.90.80.81.31.10.91.01.00.90.90.80.60.70.91.80.6

us-gaap:OtherAssetsCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value29269710244341291408982562322281716272010.0
Percentage of OtherAssetsCurrent4.15.323.322.011.49.235.831.421.517.014.97.76.77.87.56.210.37.84.4
Percentage of Assets0.10.10.20.20.10.10.30.30.20.20.10.10.10.10.10.10.10.10.0
Percentage of Assets lmca:LibertyBravesGroup1.71.56.16.42.82.37.17.34.64.23.01.31.31.71.11.22.12.01.2

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value66322392137102844010415522411378851185.018
Percentage of OtherAssetsCurrent93.545.722.129.526.522.611.123.337.446.430.126.126.133.12.27.9
Percentage of Assets1.40.50.20.30.20.20.10.20.40.50.30.20.20.30.00.1
Percentage of Assets lmca:LibertyFormulaOneGroup5.72.00.81.20.90.70.40.91.31.91.00.60.70.90.20.9

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value227239227225239253191202170177207198219211206236232232215
Percentage of OtherAssetsCurrent32.049.054.648.562.168.253.145.341.136.655.166.267.259.190.791.588.290.394.3
Percentage of Assets0.50.50.50.50.50.60.50.50.40.40.50.50.50.50.70.70.80.80.7
Percentage of Assets lmca:LibertySiriusXmGroup0.70.80.70.70.80.80.70.70.60.60.70.70.80.80.80.90.80.90.8

us-gaap:OtherAssetsCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-30
Value-210.0
Percentage of OtherAssetsCurrent-29.6
Percentage of Assets-0.5
Percentage of Assets srt:ConsolidationEliminations36.5

None

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value384938033780371436303562376538213755372735963485339333293182298027922698258724432321232122572282225222062149209020231963468504
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.38.78.68.58.38.19.29.29.08.88.68.38.28.110.19.49.08.98.78.07.57.47.26.76.66.56.26.26.06.15.66.5

us-gaap:PropertyPlantAndEquipmentGross lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value97294592388385782111371238123412381150112010831051943783647504406
Percentage of PropertyPlantAndEquipmentGross25.324.824.423.823.623.030.232.432.933.232.032.131.931.629.626.323.218.715.7
Percentage of Assets2.12.22.12.02.01.92.83.03.02.92.72.72.62.63.02.52.11.71.4
Percentage of Assets lmca:LibertyBravesGroup57.155.157.955.455.355.563.064.763.663.661.662.162.563.460.957.250.450.547.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value188169171192181181178179180182172174169166160197
Percentage of PropertyPlantAndEquipmentGross4.94.44.55.25.05.14.74.74.84.94.85.05.05.05.07.6
Percentage of Assets0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.7
Percentage of Assets lmca:LibertyFormulaOneGroup1.61.51.51.71.61.61.61.61.61.51.51.41.41.35.310.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2689268926862639259225602450240423412307227421912141211220792038198520031984
Percentage of PropertyPlantAndEquipmentGross69.970.771.171.171.471.965.162.962.361.963.262.963.163.465.368.471.174.276.7
Percentage of Assets5.86.16.16.05.95.86.05.85.65.45.45.25.25.26.66.56.46.66.7
Percentage of Assets lmca:LibertySiriusXmGroup8.08.68.58.58.38.28.78.48.28.08.07.87.77.87.77.47.37.47.3

None

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value16041558151814841419135712961245118311241055971922863830817750748708656604552501496446394341298250180261289
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.53.43.43.23.13.23.02.82.62.52.32.22.12.62.62.42.52.42.11.91.81.61.51.31.21.00.90.70.63.13.7

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1551411281171059296937864513625141346454544
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment9.79.18.47.97.46.87.47.56.65.74.83.72.71.61.65.66.06.06.2
Percentage of Assets0.30.30.30.30.20.20.20.20.20.20.10.10.10.00.00.10.10.10.1
Percentage of Assets lmca:LibertyBravesGroup9.18.28.07.36.86.25.34.94.03.32.72.01.40.80.83.43.54.55.2

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value61585992919188878687777676727193
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.83.73.96.26.46.76.87.07.37.77.37.88.28.38.613.1
Percentage of Assets0.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.3
Percentage of Assets lmca:LibertyFormulaOneGroup0.50.50.50.80.80.80.80.80.70.70.70.60.60.62.44.8

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value138813591331127512231174111210651019973927859821777746703637615571
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment86.587.287.785.986.286.585.885.586.186.687.988.589.090.089.986.084.982.280.6
Percentage of Assets3.03.13.02.92.82.72.72.62.42.32.22.12.01.92.42.22.12.01.9
Percentage of Assets lmca:LibertySiriusXmGroup4.14.44.24.13.93.73.93.73.63.43.23.13.02.92.82.62.32.32.1

None

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-31
Value1971981972042071821621701681541461671651163745473939444032353841361083055267.03.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value224522452262223022112205246925762572260325412514247124662352216320421950187917871717176917561786180618121808179217731783207215
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.95.15.15.15.15.06.06.26.26.16.16.06.06.07.56.96.66.46.35.85.55.65.65.35.35.45.25.35.25.52.52.8

us-gaap:PropertyPlantAndEquipmentNet lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value81780479576675272910411145115611741099108410581037930737602459362
Percentage of PropertyPlantAndEquipmentNet36.435.835.134.334.033.142.244.444.945.143.343.142.842.139.534.129.523.519.3
Percentage of Assets1.81.81.81.81.71.72.52.82.82.82.62.62.62.53.02.31.91.51.2
Percentage of Assets lmca:LibertyBravesGroup48.046.949.948.148.549.357.759.959.660.358.960.161.062.560.153.846.845.942.6

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1271111121009090909294959598939489104
Percentage of PropertyPlantAndEquipmentNet5.74.95.04.54.14.13.63.63.73.63.73.93.83.83.85.5
Percentage of Assets0.30.30.30.20.20.20.20.20.20.20.20.20.20.20.30.3
Percentage of Assets lmca:LibertyFormulaOneGroup1.11.01.00.90.80.80.80.80.80.80.80.80.80.83.05.3

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1301133013551364136913861338133913221334134713321320133513331335134813881413
Percentage of PropertyPlantAndEquipmentNet58.059.259.961.261.962.954.252.051.451.253.053.053.454.156.761.766.071.275.2
Percentage of Assets2.83.03.13.13.13.23.33.23.23.13.23.23.23.34.24.24.44.64.7
Percentage of Assets lmca:LibertySiriusXmGroup3.94.34.34.44.44.44.74.74.64.64.74.74.84.94.94.94.95.15.2

None

us-gaap:Goodwill

us-gaap:Goodwill


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value199561993919939199521994819927183861838618383183831838318395183981831314345143451434514345143451434514345143451434514391143891438914365142031422114215332332332
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.245.445.145.745.645.445.044.244.043.243.844.044.544.745.745.446.447.348.146.846.145.646.042.542.242.741.641.842.043.94.04.30.0

us-gaap:Goodwill dei:LegalEntity, us-gaap:BusinessAcquisition

lmca:SiriusXmHoldings, lmca:Simplecast


None
Period End2020-06-16
Value17
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets lmca:SiriusXmHoldings lmca:Simplecast0.0

us-gaap:Goodwill lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value39563956395639563956395639563956395639563956396839683968
Percentage of Goodwill19.819.819.819.819.819.921.521.521.521.521.521.621.621.7
Percentage of Assets8.69.09.09.19.19.09.79.59.59.39.49.59.69.7
Percentage of Assets lmca:LibertyFormulaOneGroup34.234.834.434.835.034.836.134.534.133.433.532.532.431.8

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value15820158031580315816158121579114250142501424714247142471424714250141651416514165141651416514165
Percentage of Goodwill79.379.379.379.379.379.277.577.577.577.577.577.577.577.398.798.798.798.798.7
Percentage of Assets34.236.035.836.236.236.034.934.234.133.533.934.034.434.545.144.945.946.747.5
Percentage of Assets lmca:LibertySiriusXmGroup47.250.850.351.050.750.350.450.050.049.249.950.751.652.352.451.651.852.552.5

us-gaap:Goodwill us-gaap:ReportingUnit

lmca:SiriusXmHoldings


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value15820158031581615812157911425014247
Percentage of Goodwill79.379.379.379.379.277.577.5
Percentage of Assets34.235.836.236.236.034.933.9
Percentage of Assets lmca:SiriusXmHoldings0.00.00.00.00.00.00.0

None

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value5653579059406079622263675715583059526015613162426373646710721070106810801097111211251081109611451170120812009649871039120135108
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.213.213.413.914.214.514.014.014.214.114.614.915.415.83.43.43.53.63.73.63.63.43.53.43.43.63.52.82.93.21.41.70.0

us-gaap:FiniteLivedIntangibleAssetsNet lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value30333435443737384249495973727369646770
Percentage of FiniteLivedIntangibleAssetsNet0.50.60.60.60.70.60.60.70.70.80.80.91.11.16.86.46.06.26.4
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.2
Percentage of Assets lmca:LibertyBravesGroup1.81.92.12.22.82.52.02.02.22.52.63.34.24.34.75.05.06.78.2

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value410342024303441245224632473648454953500251105212531354141.0
Percentage of FiniteLivedIntangibleAssetsNet72.672.672.472.672.772.882.983.183.283.283.383.583.483.70.1
Percentage of Assets8.99.69.710.110.310.511.611.611.811.812.212.512.813.20.0
Percentage of Assets lmca:LibertyFormulaOneGroup35.437.037.438.840.040.743.242.242.742.243.342.743.443.40.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1520155516031632165616989429479579649729719879819981001100410131027
Percentage of FiniteLivedIntangibleAssetsNet26.926.927.026.826.626.716.516.216.116.015.915.615.515.293.193.694.093.893.6
Percentage of Assets3.33.53.63.73.83.92.32.32.32.32.32.32.42.43.23.23.33.33.4
Percentage of Assets lmca:LibertySiriusXmGroup4.55.05.15.35.35.43.33.33.43.33.43.53.63.63.73.63.73.83.8

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

lmca:FiaAgreement


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value29873037308731363185323432843331337834263473351635583601
Percentage of FiniteLivedIntangibleAssetsNet52.852.552.051.651.250.857.557.156.857.056.656.355.855.7
Percentage of Assets6.56.97.07.27.37.48.08.08.18.18.38.48.68.8
Percentage of Assets lmca:FiaAgreement0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-03-312012-12-312011-12-312010-12-31
Value18081885196320462129221218891962203621092183225223242399602616630644659673687702716744759773566587283128
Percentage of FiniteLivedIntangibleAssetsNet32.032.633.033.734.234.733.133.734.235.135.636.136.537.156.257.659.059.660.160.561.164.965.365.064.964.458.756.523.323.025.9
Percentage of Assets3.94.34.44.74.95.04.64.74.95.05.25.45.65.91.92.02.02.12.22.22.22.22.32.22.22.21.71.80.30.40.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LicensingAgreements


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-03-312012-12-312010-12-31
Value1201251311371431481691741811841921992072032072142212282352422502572642732802942933040.00.0
Percentage of FiniteLivedIntangibleAssetsNet2.12.22.22.32.32.33.03.03.03.13.13.23.23.119.320.020.721.121.421.822.223.824.123.823.924.530.429.30.00.0
Percentage of Assets0.30.30.30.30.30.30.40.40.40.40.50.50.50.50.70.70.70.80.80.80.80.80.80.80.80.90.90.90.00.0
Percentage of Assets us-gaap:LicensingAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-03-312012-12-312010-12-31
Value73874375976076577337336335729628327528426426324021720820319718812211612813112001051488080
Percentage of FiniteLivedIntangibleAssetsNet13.112.812.812.512.312.16.56.26.04.94.64.44.54.124.522.420.319.318.517.716.711.310.611.211.2100.010.914.266.774.1
Percentage of Assets1.61.71.71.71.81.80.90.90.90.70.70.70.70.60.80.80.70.70.70.60.60.40.40.40.43.50.30.51.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value16941508201317451689124658378181171564070170969248043537843446535336735632628229629037919217991240238
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.44.64.03.92.81.41.91.91.71.51.71.71.71.51.41.21.41.61.21.21.11.00.80.90.91.10.60.50.32.93.1

us-gaap:OtherAssetsNoncurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value70777573736247434420221516181412121415
Percentage of OtherAssetsNoncurrent4.15.13.74.24.35.08.15.55.42.83.42.12.32.62.92.83.23.23.2
Percentage of Assets0.20.20.20.20.20.10.10.10.10.00.10.00.00.00.00.00.00.00.1
Percentage of Assets lmca:LibertyBravesGroup4.14.54.74.64.74.22.62.22.31.01.20.80.91.10.90.90.91.41.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value65380412121032960645416614646575501569576552350303
Percentage of OtherAssetsNoncurrent38.553.360.259.156.851.871.478.679.780.478.381.281.279.872.965.2
Percentage of Assets1.41.82.72.42.21.51.01.51.51.41.21.41.41.31.11.0
Percentage of Assets lmca:LibertyFormulaOneGroup5.67.110.59.18.55.73.85.35.64.94.24.74.74.411.715.5

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1003659764702711596120124121120117147146150145156140157151
Percentage of OtherAssetsNoncurrent59.243.738.040.242.147.820.615.914.916.818.321.020.621.730.235.937.036.232.5
Percentage of Assets2.21.51.71.61.61.40.30.30.30.30.30.40.40.40.50.50.50.50.5
Percentage of Assets lmca:LibertySiriusXmGroup3.02.12.42.32.31.90.40.40.40.40.40.50.50.60.50.60.50.60.6

us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-32.0-32.0-38.0-62.0-55.0-57.0
Percentage of OtherAssetsNoncurrent-1.9-2.1-1.9-3.6-3.3-4.6
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets srt:ConsolidationEliminations5.612.011.519.717.818.4

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value6015458438883882397339613244337936553587397933543311351228723286299529652813276129702684265032313321329131722760242424523851230
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.010.48.88.99.19.07.98.18.78.49.58.08.08.69.210.49.79.89.49.09.58.58.59.59.79.89.28.17.27.64.615.9

us-gaap:LiabilitiesCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value55826518811917012384431362049115716318616892139218
Percentage of LiabilitiesCurrent9.35.84.83.14.33.12.61.33.75.72.34.74.95.35.82.84.67.4
Percentage of Assets1.20.60.40.30.40.30.20.10.30.50.20.40.40.50.50.30.40.7
Percentage of Assets lmca:LibertyBravesGroup32.815.511.87.511.08.34.72.27.010.54.98.79.411.210.96.710.821.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value912123242650753862936050157961530551050174832
Percentage of LiabilitiesCurrent15.226.911.013.113.515.911.114.815.817.17.715.215.121.31.1
Percentage of Assets2.02.81.01.21.21.40.91.21.41.40.71.21.21.80.1
Percentage of Assets lmca:LibertyFormulaOneGroup7.910.83.74.54.85.53.34.45.05.22.64.24.16.01.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value475530873274325632653209280028352940276835832687264725782673314927912867
Percentage of LiabilitiesCurrent79.167.384.283.982.281.086.383.980.477.290.080.179.973.493.195.893.296.7
Percentage of Assets10.37.07.47.57.57.36.96.87.06.58.56.46.46.38.510.09.09.5
Percentage of Assets lmca:LibertySiriusXmGroup14.29.910.410.510.510.29.910.010.39.612.69.69.69.59.911.510.210.6

us-gaap:LiabilitiesCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-30
Value-210.0
Percentage of LiabilitiesCurrent-3.5
Percentage of Assets-0.5
Percentage of Assets srt:ConsolidationEliminations36.5

None

us-gaap:DebtCurrent

us-gaap:DebtCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value18745906014131317181836768475.0485.06092562562552562582582577547627707774964.04.04.0754
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.11.30.10.00.00.00.00.00.00.11.80.10.00.10.01.90.80.80.90.80.80.80.82.22.22.32.21.50.00.00.09.8

us-gaap:DebtCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value382114591313141414311343
Percentage of DebtCurrent20.419.398.3100.0100.082.477.877.886.11.791.5
Percentage of Assets0.80.30.10.00.00.00.00.00.10.00.1
Percentage of Assets lmca:LibertyBravesGroup22.46.63.70.80.90.80.70.71.60.72.4

lmca:LibertyFormulaOneGroup


None
Period End2020-03-312017-03-31
Value47543
Percentage of DebtCurrent80.589.6
Percentage of Assets1.10.1
Percentage of Assets lmca:LibertyFormulaOneGroup4.20.3

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value14921.01.03.04.04.05.07554.05.05.05.0609256256255
Percentage of DebtCurrent79.60.21.717.622.222.213.998.38.5100.010.4100.0100.0100.0100.0100.0
Percentage of Assets3.20.00.00.00.00.00.01.80.00.00.00.01.90.80.80.9
Percentage of Assets lmca:LibertySiriusXmGroup4.50.00.00.00.00.00.02.60.00.00.00.02.20.90.90.9

None

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value14011308162115371507134711161097122910641250
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.03.03.73.53.43.12.72.62.92.53.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7051635762392931566858
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent5.03.93.93.74.12.92.62.84.66.44.6
Percentage of Assets0.20.10.10.10.10.10.10.10.10.20.1
Percentage of Assets lmca:LibertyBravesGroup4.13.04.03.64.02.61.61.62.93.53.1

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value171150264240225164233224176144258
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent12.211.516.315.614.912.220.920.414.313.520.6
Percentage of Assets0.40.30.60.50.50.40.60.50.40.30.6
Percentage of Assets lmca:LibertyFormulaOneGroup1.51.32.32.12.01.42.12.01.51.22.2

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value116011071294124012201144854842997852934
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent82.884.679.880.781.084.976.576.881.180.174.7
Percentage of Assets2.52.52.92.82.82.62.12.02.42.02.2
Percentage of Assets lmca:LibertySiriusXmGroup3.53.64.14.03.93.63.03.03.52.93.3

None

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value102101941109710232292124202822275.01548663.0331729401571731281504544253785
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.30.20.20.10.10.10.10.00.10.10.10.00.00.20.20.00.10.10.10.10.50.50.40.40.10.10.10.41.1

us-gaap:OtherLiabilitiesCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4.05.05.0178.0118.09.08.09.08.0
Percentage of OtherLiabilitiesCurrent3.95.05.315.58.210.825.031.038.137.540.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets lmca:LibertyBravesGroup0.20.30.31.10.50.70.40.50.40.50.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1921171918239.03.09.0119.02019243.0
Percentage of OtherLiabilitiesCurrent18.620.818.117.318.622.528.110.342.945.845.071.486.488.960.0
Percentage of Assets0.00.00.00.00.00.10.00.00.00.00.00.00.00.10.0
Percentage of Assets lmca:LibertyFormulaOneGroup0.20.20.10.20.20.20.10.00.10.10.10.20.20.20.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value289757274716815174.04.03.08.03.03.03.03.03.03.03.0
Percentage of OtherLiabilitiesCurrent283.374.376.667.373.266.746.958.619.016.715.028.613.611.160.020.06.24.5100.0
Percentage of Assets0.60.20.20.20.20.20.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets lmca:LibertySiriusXmGroup0.90.20.20.20.20.20.10.10.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherLiabilitiesCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-30
Value-210.0
Percentage of OtherLiabilitiesCurrent-205.9
Percentage of Assets-0.5
Percentage of Assets srt:ConsolidationEliminations36.5

None

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value26382585211322352356249920792235238724631941
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.75.94.85.15.45.75.15.45.75.84.6

us-gaap:ContractWithCustomerLiabilityCurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1211087052959554459714051
Percentage of ContractWithCustomerLiabilityCurrent4.64.23.32.34.03.82.62.04.15.72.6
Percentage of Assets0.30.20.20.10.20.20.10.10.20.30.1
Percentage of Assets lmca:LibertyBravesGroup7.16.34.43.36.16.43.02.45.07.22.7

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value684554113245287410932353554138.0
Percentage of ContractWithCustomerLiabilityCurrent25.921.45.311.012.216.44.510.514.916.80.4
Percentage of Assets1.51.30.30.60.70.90.20.60.81.00.0
Percentage of Assets lmca:LibertyFormulaOneGroup5.94.91.02.22.53.60.82.03.13.50.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value18331923193019381974199419321955193519101882
Percentage of ContractWithCustomerLiabilityCurrent69.574.491.386.783.879.892.987.581.177.597.0
Percentage of Assets4.04.44.44.44.54.54.74.74.64.54.5
Percentage of Assets lmca:LibertySiriusXmGroup5.56.26.16.36.36.46.86.96.86.66.6

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:StatementBusinessSegments

lmca:FormulaOneAndBravesHoldings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value80666218429738251215428645855259
Percentage of ContractWithCustomerLiabilityCurrent30.625.68.713.316.220.57.412.819.222.43.0
Percentage of Assets1.71.50.40.70.91.20.40.71.11.30.1
Percentage of Assets lmca:FormulaOneAndBravesHoldings0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:LongTermDebt

us-gaap:LongTermDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value168541514315476147211442414039133881339813270141131395413492135241335480188119753171186896680265576471585260745939466855554881436324195401295
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.534.535.033.733.032.032.832.231.733.233.232.232.732.625.625.724.423.523.122.221.120.618.817.917.413.916.114.412.97.56.516.8

None

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value14980145531541614707144111402613371133801325214077131861344513519133068013751072756862662665466299621355955320517738984778438543592415536541
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.433.134.933.733.031.932.732.131.733.131.432.132.732.525.523.823.622.622.221.320.219.817.915.715.211.613.812.912.97.56.47.0

us-gaap:LongTermDebtNoncurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value332580495521452461477608611568649533502410328211137108139
Percentage of LongTermDebtNoncurrent2.24.03.23.53.13.33.64.54.64.04.94.03.73.14.12.81.91.62.1
Percentage of Assets0.71.31.11.21.01.01.21.51.51.31.51.31.21.01.00.70.40.40.5
Percentage of Assets lmca:LibertyBravesGroup19.533.831.132.729.231.226.431.831.529.234.829.629.024.721.215.410.710.816.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value3672490356775329525652045039526553535558579659346305665415831033
Percentage of LongTermDebtNoncurrent24.533.736.836.236.537.137.739.340.439.544.044.146.650.019.815.6
Percentage of Assets7.911.212.812.212.011.912.312.612.813.113.814.215.216.25.03.5
Percentage of Assets lmca:LibertyFormulaOneGroup31.743.249.346.946.545.846.045.946.246.949.148.751.553.352.952.9

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value10976907092448857870383617855750772887951674169786712624261025753610757195454
Percentage of LongTermDebtNoncurrent73.362.360.060.260.459.658.756.155.056.551.151.949.646.976.276.683.983.382.3
Percentage of Assets23.820.720.920.319.919.019.218.017.418.716.116.716.215.219.418.219.818.918.3
Percentage of Assets lmca:LibertySiriusXmGroup32.829.229.428.627.926.727.826.425.627.523.624.824.323.022.621.022.321.220.2

None

us-gaap:MinorityInterest

us-gaap:MinorityInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value5478553556305661588564885103550955775498563156155636579659606288640467047198744878848332877885738961973698019560993710474-8.0-10.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.912.612.713.013.514.812.513.213.312.913.413.413.614.119.019.920.722.124.224.325.326.528.125.326.328.928.428.229.332.3-0.1-0.1

us-gaap:MinorityInterest lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3.03.02.03.03.03.03.02.02.03.02.02.0-1.0
Percentage of MinorityInterest0.10.10.00.10.10.00.10.00.00.10.00.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0-0.0
Percentage of Assets lmca:LibertyFormulaOneGroup0.00.00.00.00.00.00.00.00.00.00.00.0-0.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value5475553256285666589064935108550255705490561555985621578159466273639066957198
Percentage of MinorityInterest99.999.9100.0100.1100.1100.1100.199.999.999.999.799.799.799.799.899.899.899.9100.0
Percentage of Assets11.812.612.713.013.514.812.513.213.312.913.413.413.614.119.019.920.722.124.2
Percentage of Assets lmca:LibertySiriusXmGroup16.317.817.918.318.920.718.119.319.519.019.719.920.321.322.022.923.424.826.7

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value11211115104710061011978864886884891779786777762751765716626561502354354348375204225234263276285131251
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.52.42.32.32.22.12.12.12.11.91.91.91.92.42.42.32.11.91.61.11.11.11.10.60.70.70.80.80.91.63.3

us-gaap:OtherLiabilitiesNoncurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value221221203206200200511519508518435438433420417431388297233
Percentage of OtherLiabilitiesNoncurrent19.719.819.420.519.820.459.158.657.558.155.855.755.755.155.556.354.247.441.5
Percentage of Assets0.50.50.50.50.50.51.31.21.21.21.01.01.01.01.31.41.31.00.8
Percentage of Assets lmca:LibertyBravesGroup13.012.912.712.912.913.528.327.126.226.623.324.325.025.326.931.530.229.727.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value229229161166158139961019392616358565660
Percentage of OtherLiabilitiesNoncurrent20.420.515.416.515.614.211.111.410.510.37.88.07.57.37.510.7
Percentage of Assets0.50.50.40.40.40.30.20.20.20.20.10.20.10.10.20.2
Percentage of Assets lmca:LibertyFormulaOneGroup2.02.01.41.51.41.20.90.90.80.80.50.50.50.41.93.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value671665683634653639257266283281283285286286278279272272268
Percentage of OtherLiabilitiesNoncurrent59.959.665.263.064.665.329.730.032.031.536.336.336.837.537.036.538.043.547.8
Percentage of Assets1.51.51.51.51.51.50.60.60.70.70.70.70.70.70.90.90.90.90.9
Percentage of Assets lmca:LibertySiriusXmGroup2.02.12.22.02.12.00.90.91.01.01.01.01.01.11.01.01.01.01.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value16610161671629516517165961670716595168601688816977169431583915448149801175611705116471138110933109941107511308113981402113976141411408114419143761427764405259
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.936.836.937.838.038.040.640.540.439.940.337.837.336.537.537.137.737.536.735.835.636.036.541.441.042.040.842.542.444.177.468.1

us-gaap:StockholdersEquity lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value367427378426411378446417376377413355333335385425447327351
Percentage of StockholdersEquity2.22.62.32.62.52.32.72.52.22.22.42.22.22.23.33.63.82.93.2
Percentage of Assets0.81.00.91.00.90.91.11.00.90.91.00.80.80.81.21.31.41.11.2
Percentage of Assets lmca:LibertyBravesGroup21.624.923.726.726.525.624.721.819.419.422.119.719.220.224.931.034.832.741.3

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value661349955239535653435392555056845648565556695207491245041286983
Percentage of StockholdersEquity39.830.932.232.432.232.333.433.733.433.333.532.931.830.110.99.0
Percentage of Assets14.311.411.912.312.212.313.613.713.513.313.512.411.911.04.13.3
Percentage of Assets lmca:LibertyFormulaOneGroup57.144.045.547.147.347.450.749.548.747.848.042.740.136.142.950.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value9630107451067810735108421093710599107591086410945108611027710203101411008510026998097069599
Percentage of StockholdersEquity58.066.565.565.065.365.563.963.864.364.564.164.966.067.785.885.785.785.387.8
Percentage of Assets20.824.524.224.624.824.926.025.826.025.725.924.624.724.732.131.832.332.032.2
Percentage of Assets lmca:LibertySiriusXmGroup28.734.534.034.634.834.937.537.838.137.838.136.636.937.437.336.536.536.035.6

None

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value2208821702219252217822481231952169822369224652247522574214542108420776177161799318051180851813118442189591964020176225942293723877238822397924313247516432524950003310
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.849.449.650.851.452.853.153.753.752.853.851.350.950.756.557.058.459.660.860.160.962.564.766.867.370.969.170.671.876.477.368.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC, us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2.02.02.02.02.02.02.02.02.02.02.01.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets lmca:LibertyFormulaOneGroup us-gaap:CommonClassC us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value31102371257527803016326129843246353337643892390036953331871472687820572215311531533148334835640.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest14.110.911.712.513.414.113.814.515.716.717.218.217.516.00.50.81.50.49.19.313.013.012.752.167.90.00.0
Percentage of Assets6.75.45.86.46.97.47.37.88.58.89.39.38.98.10.30.50.90.36.16.49.29.39.740.246.20.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-31
Value156120-33.0-61.0-25.0-43.0-38.0-75.0-69.0-39.0-35.0-34.0-52.0-62.0-62.0-54.0-51.0-46.0-51.0-21.04.012
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.70.6-0.2-0.3-0.1-0.2-0.2-0.3-0.3-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.3-0.3-0.10.00.2
Percentage of Assets0.30.3-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.10.00.1
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value54785535563056615885648851035509557754985631561556365796596062886404670471987448788483328778857398019560993710474-8.0-10.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest24.825.525.725.526.228.023.524.624.824.524.926.226.727.933.634.935.537.139.740.441.642.443.537.941.039.940.942.3-0.1-0.20.00.0
Percentage of Assets11.912.612.713.013.514.812.513.213.312.913.413.413.614.119.019.920.722.124.224.325.326.528.125.328.428.229.332.3-0.1-0.10.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value1333913671137481379313600134841364413684134191324713081119681180011706117271160811426113461098111037111121133311416119641185911307112371114130791665829-171.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest60.463.062.762.260.558.162.961.259.758.957.955.856.056.366.264.563.362.760.659.858.657.756.653.049.747.246.245.047.931.716.6-5.2
Percentage of Assets28.931.131.131.631.130.733.432.932.131.131.128.628.528.537.436.837.037.436.936.035.736.136.635.334.333.333.234.437.021.60.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.01000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets lmca:LibertyFormulaOneGroup us-gaap:CommonClassC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3110237125752780301632612984324635333764389239003695333187205720362255221731153153314833483564
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.75.45.86.46.97.47.37.88.58.89.39.38.98.10.36.16.06.76.49.29.39.740.246.2

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value13339136711374813793136001348413644136841341913247130811196811800117061172711608114261134610981110371111211333114161196411931118811185911307112371114130791665
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.931.131.131.631.130.733.432.932.131.131.128.628.528.537.436.837.037.436.936.035.736.136.635.335.035.334.333.333.234.437.021.6

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value156120-33.0-61.0-25.0-43.0-38.0-75.0-69.0-39.0-35.0-34.0-52.0-62.0-62.0-54.0-51.0-46.0-51.0-46.0-40.0-28.0-21.0-3.06.04.04.0-4.0-15.0-13.012295435
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.3-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.00.00.00.0-0.0-0.0-0.00.10.40.00.0

None

us-gaap:MinorityInterest

us-gaap:MinorityInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value5478553556305661588564885103550955775498563156155636579659606288640467047198744878848332877885738961973698019560993710474-8.0-10.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.912.612.713.013.514.812.513.213.312.913.413.413.614.119.019.920.722.124.224.325.326.528.125.326.328.928.428.229.332.3-0.1-0.1

us-gaap:MinorityInterest lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3.03.02.03.03.03.03.02.02.03.02.02.0-1.0
Percentage of MinorityInterest0.10.10.00.10.10.00.10.00.00.10.00.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0-0.0
Percentage of Assets lmca:LibertyFormulaOneGroup0.00.00.00.00.00.00.00.00.00.00.00.0-0.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value5475553256285666589064935108550255705490561555985621578159466273639066957198
Percentage of MinorityInterest99.999.9100.0100.1100.1100.1100.199.999.999.999.799.799.799.799.899.899.899.9100.0
Percentage of Assets11.812.612.713.013.514.812.513.213.312.913.413.413.614.119.019.920.722.124.2
Percentage of Assets lmca:LibertySiriusXmGroup16.317.817.918.318.920.718.119.319.519.019.719.920.321.322.022.923.424.826.7

None

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


None
Period End2020-06-302017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-31
Value7540.00.00.016170.0-28.010.057
Percentage of StockIssuedDuringPeriodValueNewIssues100.00.00.00.0100.00.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value7540.00.00.016160.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.00.00.00.099.90.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.0

None

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value497178797989555442
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value345460606066454234
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue69.476.176.975.975.974.281.877.881.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value15171819192310.0128.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue30.623.923.124.124.125.818.222.219.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value312557543598523649521367644624419574336403520389448814338193367315324237270294347282268339183-16.0-39.0108
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.327.720.720.918.632.325.915.929.341.121.027.815.728.939.428.132.867.628.015.030.029.129.620.023.329.133.925.424.943.039.2-2.9-7.324.5

us-gaap:NetCashProvidedByUsedInOperatingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-16.01718-7.0214340-4.01552-1.0-27.0-26.012700.0-11.03025
Percentage of NetCashProvidedByUsedInOperatingActivities-5.13.13.3-1.24.06.67.7-1.12.38.3-0.2-4.7-7.73.013.50.0-2.53.77.9
Percentage of Revenues-0.80.80.7-0.20.72.12.0-0.20.73.4-0.1-1.3-1.20.95.30.0-0.82.52.3
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0125.0-2.08.2185.7-5.0-14.6-14.8240.0388.90.0-8.4750.0500.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-235.01361877-25.0224-13.03369179-119.076-119.087-57.0-24.0
Percentage of NetCashProvidedByUsedInOperatingActivities-75.324.43.312.9-4.834.5-2.59.010.728.7-28.413.2-35.421.6-11.0-6.2
Percentage of Revenues-12.36.80.72.7-0.911.1-0.61.43.111.8-6.03.7-5.66.2-4.3-1.7
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-2.75.111.8157.0-20.915.2-19.390.60.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value563404507528527382494338560393539525481304507413428356302
Percentage of NetCashProvidedByUsedInOperatingActivities180.472.593.488.3100.858.994.892.187.063.0128.691.5143.275.497.5106.295.543.795.9
Percentage of Revenues29.520.119.418.518.819.024.614.625.525.927.025.422.521.838.429.831.329.627.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.033.023.039.128.638.438.135.723.538.932.434.729.728.1

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-145.0-58.0-96.0-102.025825412-82.0124-424.0-223.0-446.0-671.0-1797.0-254.0-924.039-125.0-337.0-66.0-27.0144-10.0-132.0-158.0-111.0-524.0-35.0-2562.0357332-706.0-4.0592
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-7.6-2.9-3.7-3.69.212.60.6-3.55.6-27.9-11.2-21.6-31.4-128.8-19.2-66.72.9-10.4-27.9-5.1-2.213.3-0.9-11.1-13.6-11.0-51.1-3.2-237.745.271.1-127.2-0.7134.5

us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-15.0-24.0-31.0-21.0-31.0-24.0141-4.0-9.031-38.0-46.0-51.0-86.0-188.0-114.0-66.0-45.0-35.0
Percentage of NetCashProvidedByUsedInInvestingActivities10.341.432.320.6-12.0-9.41175.04.9-7.3-7.317.010.37.64.874.012.3-169.236.0-24.3
Percentage of Revenues-0.8-1.2-1.2-0.7-1.1-1.27.0-0.2-0.42.0-1.9-2.2-2.4-6.2-14.2-8.2-4.8-3.7-3.2
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0440.6-2.0-4.9110.7-190.0-24.9-29.0-1720.0-1044.4-104.6-50.4-1125.0-700.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-9.011059-1.0-11.0-10.0-5.0-12.022816-3.05.0-14.0-1650.08.0-745.0
Percentage of NetCashProvidedByUsedInInvestingActivities6.2-189.7-61.51.0-4.3-3.9-41.714.6183.9-3.81.3-1.12.191.8-3.180.6
Percentage of Revenues-0.55.52.3-0.0-0.4-0.5-0.2-0.510.41.1-0.20.2-0.7-118.30.6-53.8
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-1.0-1.939.014.0-0.51.0-2.3-1718.80.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-121.0-144.0-124.0-80.0300288-124.0-66.0-95.0-471.0-182.0-405.0-606.0-61.0-74.0-65.0-37.0-34.0-34.0
Percentage of NetCashProvidedByUsedInInvestingActivities83.4248.3129.278.4116.3113.4-1033.380.5-76.6111.181.690.890.33.429.17.0-94.927.2-23.6
Percentage of Revenues-6.3-7.2-4.7-2.810.714.3-6.2-2.9-4.3-31.0-9.1-19.6-28.3-4.4-5.6-4.7-2.7-2.8-3.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-8.3-4.5-6.6-34.3-13.0-29.4-45.0-4.7-5.7-5.1-3.0-2.8-3.2

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value20313881-469.0-700.0-685.0-531.0-398.0-1281.0-170.053-91.04.01902-644.0246140-288.0-388.0-329.0-722.032-10.0-294.077-894.094-13.01331-599.0-185.0-1.0-152.0-829.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues106.41.93.1-16.4-25.0-34.0-26.4-17.2-58.3-11.22.7-4.40.2136.3-48.817.810.2-23.9-32.1-25.6-59.13.0-0.9-24.86.6-88.49.2-1.2123.5-75.9-39.6-0.2-28.3-188.4

us-gaap:NetCashProvidedByUsedInFinancingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value171381569-11.0-19.0-150.0-5.025-82.042749082116741824618
Percentage of NetCashProvidedByUsedInFinancingActivities0.8363.218.5-14.71.62.828.21.3-2.048.279.2-81.32250.04.3-18.030.1130.0-16.056.2
Percentage of Revenues0.96.90.62.4-0.4-0.9-7.5-0.21.1-5.42.13.64.25.98.85.313.33.81.7
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-468.8-2.513.7-292.9210.040.051.11640.0644.467.9138.91150.0360.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value9192698614-1.0-3.024-73.0-358.0-209.0-13.0-106.0-54.02020-3.0435
Percentage of NetCashProvidedByUsedInFinancingActivities45.2707.9106.2-3.00.10.4-4.518.327.9122.9-24.5116.5-1350.0106.20.5176.8
Percentage of Revenues48.113.43.30.5-0.0-0.11.2-3.2-16.3-13.8-0.7-5.1-2.5144.8-0.231.4
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.05.0-11.3-61.2-183.3-2.3-21.2-8.82104.20.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value1095-369.0-20.0-552.0-688.0-663.0-405.0-320.0-948.012124-59.0-32.0-200.0-757.0-263.033-332.066
Percentage of NetCashProvidedByUsedInFinancingActivities53.9-971.1-24.7117.798.396.876.380.474.0-71.245.364.8-800.0-10.5117.5-106.923.6115.3206.2
Percentage of Revenues57.4-18.3-0.8-19.3-24.5-33.0-20.2-13.8-43.18.01.2-2.9-1.5-14.3-57.3-19.02.4-27.66.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-27.1-21.8-66.28.81.7-4.3-2.4-15.5-58.1-20.62.7-27.76.1

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value219652953322802191.0-112.0-516.03225340-327.0509
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues115.026.320.40.82.910.90.0-4.8-23.52.112.71.9-15.336.5

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14.01312.04131-13.0311.0111.0138.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect-0.624.80.4186.43100.011.6-6.03.14.32.5-4.01.6
Percentage of Revenues-0.76.50.11.41.5-0.61.40.10.60.00.60.6
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.096.9-6.517.03.655.00.57.4160.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value67350716885-38.02125.0-51.0-64.0-12.0-138.0-23.0-183.0458
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect30.695.831.5386.4-47.596.8500.045.512.4-37.5-54.5-57.556.090.0
Percentage of Revenues35.325.26.43.0-1.410.50.2-2.2-2.9-0.8-6.9-1.1-8.632.8
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.01.0-7.9-10.9-10.5-24.2-4.6-29.7477.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1537-109.0363-104.01397.0-35.0-48.0-483.04338062-157.043
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect70.0-20.668.1-472.7173.83.2-3500.042.993.6134.4150.2155.048.08.4
Percentage of Revenues80.5-5.413.9-3.65.00.3-1.7-2.1-22.02.819.13.0-7.33.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-2.3-3.3-33.73.127.14.5-11.63.3

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value312557543598523649521367644624419574336403520389448814338193367315324237270294347282268339183-16.0-39.0108
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.327.720.720.918.632.325.915.929.341.121.027.815.728.939.428.132.867.628.015.030.029.129.620.023.329.133.925.424.943.039.2-2.9-7.324.5

us-gaap:NetCashProvidedByUsedInOperatingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-16.01718-7.0214340-4.01552-1.0-27.0-26.012700.0-11.03025
Percentage of NetCashProvidedByUsedInOperatingActivities-5.13.13.3-1.24.06.67.7-1.12.38.3-0.2-4.7-7.73.013.50.0-2.53.77.9
Percentage of Revenues-0.80.80.7-0.20.72.12.0-0.20.73.4-0.1-1.3-1.20.95.30.0-0.82.52.3
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0125.0-2.08.2185.7-5.0-14.6-14.8240.0388.90.0-8.4750.0500.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-235.01361877-25.0224-13.03369179-119.076-119.087-57.0-24.0
Percentage of NetCashProvidedByUsedInOperatingActivities-75.324.43.312.9-4.834.5-2.59.010.728.7-28.413.2-35.421.6-11.0-6.2
Percentage of Revenues-12.36.80.72.7-0.911.1-0.61.43.111.8-6.03.7-5.66.2-4.3-1.7
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-2.75.111.8157.0-20.915.2-19.390.60.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value563404507528527382494338560393539525481304507413428356302
Percentage of NetCashProvidedByUsedInOperatingActivities180.472.593.488.3100.858.994.892.187.063.0128.691.5143.275.497.5106.295.543.795.9
Percentage of Revenues29.520.119.418.518.819.024.614.625.525.927.025.422.521.838.429.831.329.627.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.033.023.039.128.638.438.135.723.538.932.434.729.728.1

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-326.0-76.0-45.0193116-158.0-40.0268172131111316894-21.01191158036544-22.061-19.07333502255276968062106221937150
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-17.1-3.8-1.76.84.1-7.9-2.011.67.88.655.88.14.4-1.59.08.35.930.33.6-1.75.0-1.86.72.84.32.253.96.88.91021.822.739.8174.534.1

us-gaap:NetIncomeLoss lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-38.053-44.01226-71.01841-2.0-52.04.022-2.0-49.0-40.0-22.032-25.0-11.010.0-4.0-15.0
Percentage of NetIncomeLoss11.7-69.797.86.222.444.9-45.015.3-1.2-39.70.413.1-2.1233.3-33.6-19.140.0-6.8-25.0-45.5-6.678.9
Percentage of Revenues-2.02.6-1.70.40.9-3.50.91.8-0.1-3.40.21.1-0.1-3.5-3.0-1.62.3-2.1-0.90.8-0.3-1.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.056.220.5-1.1-185.720.011.9-1.1-980.0-222.2-20.224.4-625.0-68.88.4-3.9-300.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-200.0-343.0-127.041-77.0-148.0-184.0429.0-17.0415-37.0-27.0-96.04041-45.0291
Percentage of NetIncomeLoss61.3451.3282.221.2-66.493.7460.015.75.2-13.037.3-22.0-28.7457.133.635.7-56.279.7
Percentage of Revenues-10.5-17.0-4.81.4-2.7-7.4-9.21.80.4-1.120.8-1.8-1.3-6.93.03.0-3.324.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-38.36.51.5-14.972.8-7.4-4.4-100.00.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-88.021412614016761126185165200694183123124119968210170895347
Percentage of NetIncomeLoss27.0-281.6-280.072.5144.0-38.6-315.069.095.9152.762.4108.9130.9-590.5100.083.5102.527.7159.1-404.586.9-247.4
Percentage of Revenues-4.610.64.84.96.03.06.38.07.513.234.88.95.78.99.06.96.08.45.86.94.34.3
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.08.412.611.514.549.413.39.19.69.17.56.68.45.97.64.74.4

None

us-gaap:ProfitLoss

us-gaap:ProfitLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-262.02.020262192-127.0313662552131429261156441861691404278941991913087106726191161588110103220938151
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-13.70.10.89.26.8-6.31.515.811.614.071.712.67.33.214.112.210.235.57.43.28.11.811.97.39.17.160.410.514.71027.922.139.6174.734.3

us-gaap:ProfitLoss lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-38.053-44.01226-71.02541-3.0-52.03.022-2.0-49.0-40.0-22.025-25.0-11.010.0-4.0-15.0
Percentage of ProfitLoss14.52650.0-220.04.613.555.980.611.2-1.2-24.40.28.4-1.3-111.4-21.5-13.017.9-5.9-12.424.4-4.0-78.9
Percentage of Revenues-2.02.6-1.70.40.9-3.51.21.8-0.1-3.40.21.1-0.1-3.5-3.0-1.61.8-2.1-0.90.8-0.3-1.4
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.078.120.5-1.6-185.715.011.9-1.1-980.0-222.2-20.219.1-625.0-68.88.4-3.9-300.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-200.0-343.0-128.042-77.0-148.0-185.04210.0-17.0415-35.0-27.0-96.04041-43.0291
Percentage of ProfitLoss76.3-17150.0-640.016.0-40.1116.5-596.811.53.9-8.029.0-13.4-17.3-218.221.524.3-30.768.1
Percentage of Revenues-10.5-17.0-4.91.5-2.7-7.4-9.21.80.5-1.120.8-1.7-1.3-6.93.03.0-3.124.2
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-38.56.51.7-14.972.8-7.0-4.4-100.00.00.00.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-24.02921922082439219128324828210112741851891861501601631151529185
Percentage of ProfitLoss9.214600.0960.079.4126.6-72.4616.177.397.3132.470.7105.0118.6429.5100.088.8114.338.2129.2370.791.9447.4
Percentage of Revenues-1.314.57.37.38.74.69.512.211.318.650.713.38.613.514.110.811.713.59.511.87.47.9
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.012.819.317.320.572.019.913.714.614.311.813.013.69.613.08.17.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value64786569763171988382316936265675560624563383857
Percentage of ProfitLoss-24.43900.0325.026.339.6-24.4229.026.832.538.522.135.639.7147.736.032.542.914.550.6153.738.4200.043.8
Percentage of Revenues3.43.92.52.42.71.53.54.23.85.415.84.52.94.75.14.04.45.13.74.93.13.55.2
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-326.0-76.0-45.0193116-158.0-40.0268172131111316894-21.01191168036544-22.061-19.073
Percentage of ProfitLoss124.4-3800.0-225.073.760.4124.4-129.073.267.561.577.964.460.3-47.764.068.657.185.549.4-53.761.6-100.056.2
Percentage of Revenues-17.1-3.8-1.76.84.1-7.9-2.011.67.88.655.88.14.4-1.59.08.45.930.33.6-1.75.0-1.86.7
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-73.039-76.081615435605220-1350.011050126202276611477171170827032-93.01885102-377.0-51.010636431
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-3.0-13.0-14.02.0-4.05.00.0-2.0-26.05.0-8.0311110.0-11.0-9.0-1.02.0-4.0-3.0
Percentage of DeferredIncomeTaxExpenseBenefit4.1-33.318.43.7-11.48.30.0-10.01.94.5-16.024.655.04.4-16.7-7.9-1.311.8-36.4-4.3

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-32.0-15.0-98.020-6.0-57.0-33.0192.0-51.0-511.0-1.0-50.0-12.0-4.092-20.026
Percentage of DeferredIncomeTaxExpenseBenefit43.8-38.5128.924.7-9.8-105.6-94.331.73.8-255.037.9-0.9-100.0-9.5-20.040.5-30.322.8

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-38.06736546910972365073-813.0106108107131299595658619120
Percentage of DeferredIncomeTaxExpenseBenefit52.1171.8-47.466.7113.1201.9205.760.096.2365.060.296.4216.084.965.056.8143.983.384.4505.9172.7171.4

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value456774767686474653464885534441413434575647446653494952524841487.05.06.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation dei:LegalEntity

lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value52555865574933303634
Percentage of ShareBasedCompensation115.682.178.485.575.057.070.265.267.973.9

us-gaap:ShareBasedCompensation lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-15.03.04.04.06.03.02.04.07.0336.02.02.03.02.02.05.03.0
Percentage of ShareBasedCompensation-33.34.55.45.37.93.54.38.714.638.811.34.54.97.35.95.98.85.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value6.06.07.06.08.07.06.07.06.06.04.010.010.08.01.02.02.08.0
Percentage of ShareBasedCompensation13.39.09.57.910.58.112.815.211.313.08.311.818.918.22.44.95.923.5

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value54586366627639354240374237343836302442413737
Percentage of ShareBasedCompensation120.086.685.186.881.688.483.076.179.287.077.149.469.877.392.787.888.270.673.773.278.784.1

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-145.0-58.0-96.0-102.025825412-82.0124-424.0-223.0-446.0-671.0-1797.0-254.0-924.039-125.0-337.0-66.0-27.0144-10.0-132.0-158.0-111.0-524.0-35.0-2562.0357332-706.0-4.0592
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-7.6-2.9-3.7-3.69.212.60.6-3.55.6-27.9-11.2-21.6-31.4-128.8-19.2-66.72.9-10.4-27.9-5.1-2.213.3-0.9-11.1-13.6-11.0-51.1-3.2-237.745.271.1-127.2-0.7134.5

us-gaap:NetCashProvidedByUsedInInvestingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-15.0-24.0-31.0-21.0-31.0-24.0141-4.0-9.031-38.0-46.0-51.0-86.0-188.0-114.0-66.0-45.0-35.0
Percentage of NetCashProvidedByUsedInInvestingActivities10.341.432.320.6-12.0-9.41175.04.9-7.3-7.317.010.37.64.874.012.3-169.236.0-24.3
Percentage of Revenues-0.8-1.2-1.2-0.7-1.1-1.27.0-0.2-0.42.0-1.9-2.2-2.4-6.2-14.2-8.2-4.8-3.7-3.2
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0440.6-2.0-4.9110.7-190.0-24.9-29.0-1720.0-1044.4-104.6-50.4-1125.0-700.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-9.011059-1.0-11.0-10.0-5.0-12.022816-3.05.0-14.0-1650.08.0-745.0
Percentage of NetCashProvidedByUsedInInvestingActivities6.2-189.7-61.51.0-4.3-3.9-41.714.6183.9-3.81.3-1.12.191.8-3.180.6
Percentage of Revenues-0.55.52.3-0.0-0.4-0.5-0.2-0.510.41.1-0.20.2-0.7-118.30.6-53.8
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.0-1.0-1.939.014.0-0.51.0-2.3-1718.80.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-121.0-144.0-124.0-80.0300288-124.0-66.0-95.0-471.0-182.0-405.0-606.0-61.0-74.0-65.0-37.0-34.0-34.0
Percentage of NetCashProvidedByUsedInInvestingActivities83.4248.3129.278.4116.3113.4-1033.380.5-76.6111.181.690.890.33.429.17.0-94.927.2-23.6
Percentage of Revenues-6.3-7.2-4.7-2.810.714.3-6.2-2.9-4.3-31.0-9.1-19.6-28.3-4.4-5.6-4.7-2.7-2.8-3.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-8.3-4.5-6.6-34.3-13.0-29.4-45.0-4.7-5.7-5.1-3.0-2.8-3.2

None

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value5.0824.05.09.011114.06.03931023184375.0227510.011140.01672.01.00.025661829312162052.0
Percentage of PaymentsToAcquireInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInvestments lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.01.0-1.01.04.02.03.02.00.04.01.02.03.03.0157460.03.0
Percentage of PaymentsToAcquireInvestments0.01.2-25.020.044.418.227.350.00.01.01.00.60.760.068.299.30.027.3

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.0815.05.05.04.08.02.06.0389101316
Percentage of PaymentsToAcquireInvestments100.098.8125.0100.055.636.472.750.0100.099.099.099.4

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value20313881-469.0-700.0-685.0-531.0-398.0-1281.0-170.053-91.04.01902-644.0246140-288.0-388.0-329.0-722.032-10.0-294.077-894.094-13.01331-599.0-185.0-1.0-152.0-829.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues106.41.93.1-16.4-25.0-34.0-26.4-17.2-58.3-11.22.7-4.40.2136.3-48.817.810.2-23.9-32.1-25.6-59.13.0-0.9-24.86.6-88.49.2-1.2123.5-75.9-39.6-0.2-28.3-188.4

us-gaap:NetCashProvidedByUsedInFinancingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value171381569-11.0-19.0-150.0-5.025-82.042749082116741824618
Percentage of NetCashProvidedByUsedInFinancingActivities0.8363.218.5-14.71.62.828.21.3-2.048.279.2-81.32250.04.3-18.030.1130.0-16.056.2
Percentage of Revenues0.96.90.62.4-0.4-0.9-7.5-0.21.1-5.42.13.64.25.98.85.313.33.81.7
Percentage of Revenues lmca:LibertyBravesGroup0.00.00.00.00.00.0-468.8-2.513.7-292.9210.040.051.11640.0644.467.9138.91150.0360.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value9192698614-1.0-3.024-73.0-358.0-209.0-13.0-106.0-54.02020-3.0435
Percentage of NetCashProvidedByUsedInFinancingActivities45.2707.9106.2-3.00.10.4-4.518.327.9122.9-24.5116.5-1350.0106.20.5176.8
Percentage of Revenues48.113.43.30.5-0.0-0.11.2-3.2-16.3-13.8-0.7-5.1-2.5144.8-0.231.4
Percentage of Revenues lmca:LibertyFormulaOneGroup0.00.00.00.00.00.05.0-11.3-61.2-183.3-2.3-21.2-8.82104.20.00.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value1095-369.0-20.0-552.0-688.0-663.0-405.0-320.0-948.012124-59.0-32.0-200.0-757.0-263.033-332.066
Percentage of NetCashProvidedByUsedInFinancingActivities53.9-971.1-24.7117.798.396.876.380.474.0-71.245.364.8-800.0-10.5117.5-106.923.6115.3206.2
Percentage of Revenues57.4-18.3-0.8-19.3-24.5-33.0-20.2-13.8-43.18.01.2-2.9-1.5-14.3-57.3-19.02.4-27.66.1
Percentage of Revenues lmca:LibertySiriusXmGroup0.00.00.00.00.00.0-27.1-21.8-66.28.81.7-4.3-2.4-15.5-58.1-20.62.7-27.76.1

None

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-30
Value198285310022139196691313077272661317877322375318447265661118335434436681275540270171214025000.0
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromIssuanceOfLongTermDebt lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2217421740.00.01167.025674100114266128615.0-3.01157510.0
Percentage of ProceedsFromIssuanceOfLongTermDebt1.120.42.13.50.00.043.60.529.22.313.36.236.622.65.51.5-0.726.4110.30.8

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value47475411-1.00.02891.01963.014000.0
Percentage of ProceedsFromIssuanceOfLongTermDebt2.455.731.4-0.10.021.90.16.10.475.90.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value191320485220651965913896728150102162029536503304600.01057330399321-7.01265
Percentage of ProceedsFromIssuanceOfLongTermDebt96.523.985.096.599.9100.068.6100.156.477.570.791.686.317.963.40.094.598.591.973.6-10.399.2

us-gaap:ProceedsFromIssuanceOfLongTermDebt lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldingsMarginLoan


None
Period End2020-04-22
Value400
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0

None

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value5123725261958164674110435961264115428830286371154873607051113781573.06582768775282110488868441.05040.00.0750
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:RepaymentsOfLongTermDebt lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2.0352.05.010.0141325.091891760.010.03215055333828
Percentage of RepaymentsOfLongTermDebt0.49.40.40.30.61.912.70.87.27.761.10.01.62.817.291.74.734.27.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4781312.02.01.02.038277354496-1.03014459281.00.00.01.0
Percentage of RepaymentsOfLongTermDebt93.435.20.40.10.10.336.612.928.043.0-0.39.969.980.40.10.00.00.9

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value322065221951163572552951481956911327271821947225.067272350273.0658
Percentage of RepaymentsOfLongTermDebt6.255.499.299.699.397.850.786.264.849.339.290.128.616.882.78.395.364.992.617.2100.0100.0

None

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.01386968842229815018731473.0242580.00.00.00.00.0140818.015579
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRepurchaseOfCommonStock lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-31
Value0.069
Percentage of PaymentsForRepurchaseOfCommonStock0.050.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0694568842229815018731
Percentage of PaymentsForRepurchaseOfCommonStock0.050.065.2100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber dei:LegalEntity

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value201203228252258
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

lmca:LibertyBravesGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.0020.0020.0020.1240.1560.1720.1770.1780.1780.1790.1790.1790.1790.180.1890.1890.197
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber0.00.00.00.10.10.10.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1.3991.4011.2671.1441.2281.2681.2761.2731.2731.2761.2311.2151.2151.2241.0731.0691.083
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber0.70.70.00.50.50.50.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.0010.0010.0010.2950.3310.360.360.3620.3810.3920.40.40.4020.440.455
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber0.00.00.00.10.10.10.00.00.00.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value9.9579.9658.2848.4218.8918.9156.6846.6676.7426.7724.764.6894.7174.7822.611
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber5.04.90.03.73.53.50.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.0050.0050.0221.2061.311.3421.4031.4121.4381.5871.6261.6381.6831.8762.0182.1162.189
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber0.00.00.00.50.50.50.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value10109.8171111111111111111111110111111
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber5.05.00.05.04.74.60.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice dei:LegalEntity

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value4.584.564.394.324.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

lmca:LibertyBravesGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value11.8911.8911.8911.4311.4311.4411.4411.4211.4211.4311.4311.4311.4311.4411.311.2911.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice259.6260.70.0260.4264.6266.00.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value21.6921.6621.8217.1516.8616.716.5816.5316.5416.5216.2716.1816.1816.1114.9214.8814.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice473.6475.00.0390.7390.3388.40.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value12.6312.6312.6311.6811.6811.7111.7111.6911.6911.6911.6911.6911.6911.5611.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice275.8277.00.0266.1270.4272.30.00.00.00.00.00.00.00.00.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value30.7630.7331.1628.6428.728.6726.9226.8926.7726.724.5924.3924.3424.1615.18
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice671.6673.90.0652.4664.4666.70.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value31.031.022.6219.8219.8319.8519.8419.819.7919.7919.7819.7619.7419.7119.3919.3619.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice676.9679.80.0451.5459.0461.60.00.00.00.00.00.00.00.00.00.00.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value34.1934.1633.929.529.4229.3928.8528.7928.7728.5227.6627.4827.3926.3825.9125.6425.57
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice746.5749.10.0672.0681.0683.50.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod dei:LegalEntity, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

lmca:SiriusXmHoldings, us-gaap:RestrictedStockUnitsRSU


None
Period End2020-06-302019-09-302019-06-302019-03-31
Value7.0251.011
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0100.0100.0

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value403118351306773751671452451563107910477947541081572211
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value32934321221016919019015917214114012912811510713
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents8.218.716.227.222.528.342.035.330.613.113.416.217.010.618.76.2

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1767109458741933437216015520627028242044362616876
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents43.859.644.954.244.555.435.434.436.625.026.952.958.857.929.436.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1935398507144248109102137185668625245183340297122
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents48.021.738.818.633.016.222.630.432.961.959.730.924.331.551.957.8

lmca:AcquisitionAndRestructuringCosts

lmca:AcquisitionAndRestructuringCosts


None
Period End2020-06-302019-06-30
Value247.0
Percentage of AcquisitionAndRestructuringCosts100.0100.0

lmca:AcquisitionAndRestructuringCosts lmca:EconomicPerformanceGroup

lmca:LibertySiriusXmGroup


None
Period End2020-06-302019-06-30
Value247.0
Percentage of AcquisitionAndRestructuringCosts100.0100.0

lmca:AdjustedOibda

lmca:AdjustedOibda


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value549564648854815614650811727489633695698467442485455391364473418373359392372294319379271-17.0
Percentage of AdjustedOibda100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:AdjustedOibda lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-28.0-26.0-24.04561-33.0-12.07263-35.0-44.04827-29.0-12.01612-36.0-11.0305.0-21.0
Percentage of AdjustedOibda-5.1-4.6-3.75.37.5-5.4-1.88.98.7-7.2-7.06.93.9-6.2-2.73.32.6-9.2-3.06.31.2-5.6

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-31
Value-26.0-42.0971541365992156128-1.0138104155-13.0-13.0-7.0-12.0
Percentage of AdjustedOibda-4.7-7.415.018.016.79.614.219.217.6-0.221.815.022.2-2.9-2.7-1.5-3.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value603632575655618588570583536525539543516496467482450439385451420404
Percentage of AdjustedOibda109.8112.188.776.775.895.887.771.973.7107.485.278.173.9106.2105.799.498.9112.3105.895.3100.5108.3

lmca:AdjustedOibda lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems

lmca:LibertyBravesGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-28.0-26.04561-33.07263-35.0
Percentage of AdjustedOibda-5.1-4.65.37.5-5.48.98.7-7.2

lmca:LibertyFormulaOneGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-10.0-10.0-8.0-9.0-6.0-2.0-6.0-4.0
Percentage of AdjustedOibda-1.8-1.8-0.9-1.1-1.0-0.2-0.8-0.8

lmca:LibertySiriusXmGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-12.0-7.0-4.0-4.0-2.0-4.0-6.0-5.0
Percentage of AdjustedOibda-2.2-1.2-0.5-0.5-0.3-0.5-0.8-1.0

lmca:AdjustedOibda lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

lmca:LibertyFormulaOneGroup, us-gaap:OperatingSegments, lmca:FormulaOne


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-16.0-32.0162145651581343.0
Percentage of AdjustedOibda-2.9-5.719.017.810.619.518.40.6

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value615639659622590587542530
Percentage of AdjustedOibda112.0113.377.276.396.172.474.6108.4

lmca:DebtInstrumentUnusedBorrowingCapacityFeePercent lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument

lmca:DebtInstrumentUnusedBorrowingCapacityFeePercent

lmca:LibertySiriusXmGroup, lmca:SiriusXmCreditFacility


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value00.00250000.0025
Percentage of DebtInstrumentUnusedBorrowingCapacityFeePercent0.0100.00.00.00.0100.0

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldingsMarginLoan


None
Period End2020-03-312019-09-302019-06-302019-03-312018-03-312016-10-31
Value0.0075000.00750.00750.0075
Percentage of DebtInstrumentUnusedBorrowingCapacityFeePercent300.00.00.0300.00.00.0

lmca:ForwardContractNumberOfUnderlyingShares lmca:EconomicPerformanceGroup, us-gaap:OptionIndexedToIssuersEquityType, us-gaap:StatementClassOfStock

lmca:ForwardContractNumberOfUnderlyingShares

lmca:LibertyBravesGroup, lmca:A1.375ConvertibleNotesBondHedgeTransaction, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312016-06-162016-05-182016-05-162016-04-15
Value2.2920372.2920372.2920372.2920372.2920372.2920372.2920372.2920372.10859
Percentage of ForwardContractNumberOfUnderlyingShares100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup, lmca:A1.375ConvertibleNotesBondHedgeTransaction, us-gaap:CommonClassA


None
Period End2020-06-302016-04-15
Value2121
Percentage of ForwardContractNumberOfUnderlyingShares935.01000.0

lmca:IntergroupInterestExpenseIncome lmca:EconomicPerformanceGroup

lmca:IntergroupInterestExpenseIncome

lmca:LibertyFormulaOneGroup


None
Period End2020-06-30
Value7000000.0
Percentage of IntergroupInterestExpenseIncome100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-30
Value-7000000.0
Percentage of IntergroupInterestExpenseIncome-100.0

lmca:IntergroupTaxAllocation lmca:EconomicPerformanceGroup

lmca:IntergroupTaxAllocation

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-6.0-2.0-2.00.08.0-14.00.0-17.07.0-4.0-21.0154.0-37.0-15.00.02.0-6.0-6.05.02.0-5.0
Percentage of IntergroupTaxAllocation100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8.01.024-2.0-6.013-1.0-3.0-8.04.016-13.00.0421912-6.07.0
Percentage of IntergroupTaxAllocation-133.3-50.0-1200.00.0-75.0-92.90.017.6-114.3-100.0-76.2-86.70.0-113.5-126.70.0-300.0-116.7

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-2.01.0-22.02.0-2.01.01.0205.0-2.0-4.0-5.0-4.0-12.04.0-1.0-1.0-1.0-1.0-1.0
Percentage of IntergroupTaxAllocation33.3-50.01100.00.0-25.0-7.10.0-117.6-23.8-13.3-100.013.526.70.0200.016.716.7-20.0-50.020.0

lmca:OperatingCostsAndExpensesNet

lmca:OperatingCostsAndExpensesNet


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value8510020385
Percentage of OperatingCostsAndExpensesNet100.0100.0100.0100.0

lmca:OperatingCostsAndExpensesNet lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value242912931
Percentage of OperatingCostsAndExpensesNet28.229.063.536.5

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value61717454
Percentage of OperatingCostsAndExpensesNet71.871.036.563.5

lmca:OtherComprehensiveIncomeLossCreditRiskOnFairValueDebtInstrumentsGainLossNetOfTax

lmca:OtherComprehensiveIncomeLossCreditRiskOnFairValueDebtInstrumentsGainLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2121613-23.010.0-13.056-10.0-12.0-2.0
Percentage of OtherComprehensiveIncomeLossCreditRiskOnFairValueDebtInstrumentsGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:PaymentTaxWithholdingShareBasedPaymentArrangementNet

lmca:PaymentTaxWithholdingShareBasedPaymentArrangementNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value8.0381104417408.041
Percentage of PaymentTaxWithholdingShareBasedPaymentArrangementNet100.0100.0100.0100.0100.0100.0100.0100.0

lmca:PaymentTaxWithholdingShareBasedPaymentArrangementNet lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.02.015-16.03.04.01.00.0
Percentage of PaymentTaxWithholdingShareBasedPaymentArrangementNet0.05.313.6-36.417.610.012.50.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value8.036925914367.041
Percentage of PaymentTaxWithholdingShareBasedPaymentArrangementNet100.094.783.6134.182.490.087.5100.0

lmca:RelatedPartyTransactionPaymentsReceivablePercentOfGrossRevenue dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransaction

lmca:RelatedPartyTransactionPaymentsReceivablePercentOfGrossRevenue

lmca:SiriusXmHoldings, lmca:SiriusXmCanada, lmca:AdvisoryServicesAgreement


None
Period End2020-06-302020-03-312017-05-25
Value00.050.05
Percentage of RelatedPartyTransactionPaymentsReceivablePercentOfGrossRevenue0.0100.0100.0

lmca:SiriusXmHoldings, lmca:SiriusXmCanada, lmca:ServicesAgreement


None
Period End2020-06-302020-03-31
Value00.25
Percentage of RelatedPartyTransactionPaymentsReceivablePercentOfGrossRevenue0.0500.0

lmca:ReturnOfInvestmentInEquityMethodAffiliates

lmca:ReturnOfInvestmentInEquityMethodAffiliates


None
Period End2020-06-302020-03-31
Value0.0105
Percentage of ReturnOfInvestmentInEquityMethodAffiliates0.0100.0

lmca:ReturnOfInvestmentInEquityMethodAffiliates lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-31
Value0.0105
Percentage of ReturnOfInvestmentInEquityMethodAffiliates0.0100.0

lmca:ShareOfOtherComprehensiveEarningsLossOfEquityAffiliates

lmca:ShareOfOtherComprehensiveEarningsLossOfEquityAffiliates


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value4.09.0-8.0-3.0-3.0-18.0-9.02.03.07.02.0-7.0-2.0-5.0-4.0-1.05.0-7.0-6.0-8.02.03.02.08.0
Percentage of ShareOfOtherComprehensiveEarningsLossOfEquityAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:SubscriberAcquisitionCosts

lmca:SubscriberAcquisitionCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-03-31
Value4899114101104108118110119123127119126127131121129132141133137122126120124123124131970.0
Percentage of SubscriberAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

lmca:SubscriberAcquisitionCosts lmca:EconomicPerformanceGroup

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4899114101104108118110119123127119126127131121129132141133137122
Percentage of SubscriberAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:SubsidiarySharesRepurchasedBySubsidiary

lmca:SubsidiarySharesRepurchasedBySubsidiary


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-03-31
Value156243200485898576652328253094132124783062899-229.0-402.0-594.0-370.0-564.0-549.0-535.0-507.0-704.0-865.0-81.00.0-466.00.0
Percentage of SubsidiarySharesRepurchasedBySubsidiary100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

lmca:SubsidiarySharesRepurchasedBySubsidiary lmca:EconomicPerformanceGroup

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value156243200485898576652328253094132124783062899-229.0-402.0-594.03666-564.0-549.0-535.0
Percentage of SubsidiarySharesRepurchasedBySubsidiary100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-990.8100.0100.0100.0

lmca:UnrealizedGainLossOnIntergroupInterest lmca:EconomicPerformanceGroup

lmca:UnrealizedGainLossOnIntergroupInterest

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value7.0-95.016-2.02.02622-13.0-28.0-5.028-12.0-3.0-28.0-25.027
Percentage of UnrealizedGainLossOnIntergroupInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-30
Value28
Percentage of UnrealizedGainLossOnIntergroupInterest400.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-31
Value-4.0-31.0
Percentage of UnrealizedGainLossOnIntergroupInterest-57.132.6

lmca:UnrealizedGainsLossesOnIntergroupInterest lmca:EconomicPerformanceGroup

lmca:UnrealizedGainsLossesOnIntergroupInterest

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-7.095-16.02.0-2.0-26.022-13.0-28.0-5.028-12.0-3.0-28.0-29.0-25.027
Percentage of UnrealizedGainsLossesOnIntergroupInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-29.0-126.016-2.02.026-22.013285.0-28.0123.0282925-27.0
Percentage of UnrealizedGainsLossesOnIntergroupInterest414.3-132.6-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-31
Value3631
Percentage of UnrealizedGainsLossesOnIntergroupInterest-514.332.6

us-gaap:AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation

us-gaap:AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation


None
Period End2020-06-302020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8.038408.0415328406310.0221533
Percentage of AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8.038408.0415328406310.0221533
Percentage of AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests us-gaap:StatementEquityComponents

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-03-312014-12-31
Value-8.0-20.0-23.0-35.0-13.0-21.0-3.0-28.0-21.0-13.0-8.0-7.0
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-03-312014-12-31
Value8.020234313213.02821138.07.0
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests-100.0-100.0-100.0-122.9-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value165243193464898604646334222954162114772994602221580-588.0-3663.0553560534-3781.0
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value3260631272081641971327.0801196411967662452-12.0-261.0275826-387.0
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary19.424.732.627.423.227.230.539.531.827.128.630.324.922.414.310.83.32.07.14.910.44.910.2

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value133183130337690440449202152152971473582323941981528-576.0-3402.0526502508-3394.0
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary80.675.367.472.676.872.869.560.568.272.971.469.775.177.685.789.296.798.092.995.189.695.189.8

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

lmca:LibertyFormulaOneGroup, lmca:LiveNationMarginLoan, us-gaap:LondonInterbankOfferedRateLIBOR


None
Period End2020-03-312019-03-312018-12-102017-12-122016-11-08
Value0.0180.0180.0180.0190.0225
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldingsMarginLoan, us-gaap:LondonInterbankOfferedRateLIBOR


None
Period End2020-03-312019-03-312018-03-312016-10-31
Value0.02050.02050.02050.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate1113.9113.90.00.0

us-gaap:DebtInstrumentRedemptionPricePercentage lmca:EconomicPerformanceGroup, us-gaap:DebtInstrument

us-gaap:DebtInstrumentRedemptionPricePercentage

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldings4.625SeniorNotesDue2023


None
Period End2020-07-09
Value1.008
Percentage of DebtInstrumentRedemptionPricePercentage100.0

lmca:LibertySiriusXmGroup, lmca:SiriusXmHoldings5.375SeniorNotesDue2025


None
Period End2020-07-09
Value1.027
Percentage of DebtInstrumentRedemptionPricePercentage101.9

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value266267271271271248224234231216209228223164829293879096928487909290787988702612119.0
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value201517202113142323161724242.02.012135.06.0119.05.0
Percentage of DepreciationAndAmortization7.55.66.37.47.75.26.29.810.07.48.110.510.81.22.413.014.05.76.711.59.86.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value104104113116114110115118116111110111112723.01.03.03.0
Percentage of DepreciationAndAmortization39.139.041.742.842.144.451.350.450.251.452.648.750.243.93.71.13.23.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value14214814113513612595939289829387907779777982828177
Percentage of DepreciationAndAmortization53.455.452.049.850.250.442.439.739.841.239.240.839.054.993.985.982.890.891.185.488.091.7

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-06-302020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2000000.0-8000000.01000000.0-3000000.02000000.0-3000000.02000000.04000000.01000000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2000000.0-8000000.01000000.0-3000000.02000000.0-3000000.02000000.04000000.01000000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-193.0-62.0-63.05534-20.0-54.05822-8.0-63.015516-4.0-29.03718-12.0-32.0290.0-37.0-60.0-6.0-12.0-35.0-20.0-8.0-21.0173914122912
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-1.04.05.04.07.02.04.02.03.03.06.0681.03.03.02.02.02.03.02.02.02.0
Percentage of IncomeLossFromEquityMethodInvestments0.5-6.5-7.97.320.6-10.0-7.43.413.6-37.5-9.543.96.2-75.0-10.35.411.1-16.7-9.46.90.0-5.4

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-46.0-64.0-62.05834-18.0-49.05820-12.0-66.05320-10.0-34.03314-21.0
Percentage of IncomeLossFromEquityMethodInvestments23.8103.298.4105.5100.090.090.7100.090.9150.0104.834.2125.0250.0117.289.277.8175.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-146.0-2.0-6.0-7.0-7.0-4.0-9.0-2.0-1.01.0-3.034-5.03.02.02.02.07.02.01.03.0-7.0
Percentage of IncomeLossFromEquityMethodInvestments75.63.29.5-12.7-20.620.016.7-3.4-4.5-12.54.821.9-31.2-75.0-6.95.411.1-58.3-6.23.40.018.9

us-gaap:IncomeLossFromEquityMethodInvestments lmca:EconomicPerformanceGroup, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

lmca:LibertyBravesGroup, lmca:OtherEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1.04.05.04.07.02.04.02.03.03.06.0681.03.03.02.0
Percentage of IncomeLossFromEquityMethodInvestments0.5-6.5-7.97.320.6-10.0-7.43.413.6-37.5-9.543.96.2-75.0-10.35.4

lmca:LibertyFormulaOneGroup, lmca:LiveNation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-46.0-66.0-57.05430-23.0-54.05419-16.0-69.04323-15.0-37.0339.0-17.0
Percentage of IncomeLossFromEquityMethodInvestments23.8106.590.598.288.2115.0100.093.186.4200.0109.527.7143.8375.0127.689.250.0141.7

lmca:LibertyFormulaOneGroup, lmca:OtherEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.02.0-5.04.04.05.05.04.01.04.03.010.0-3.05.03.0
Percentage of IncomeLossFromEquityMethodInvestments-0.0-3.27.97.311.8-25.0-9.36.94.5-50.0-4.86.5-18.8-125.0-10.3

lmca:LibertySiriusXmGroup, lmca:LiveNation


None
Period End2020-06-30
Value-144.0
Percentage of IncomeLossFromEquityMethodInvestments74.6

lmca:LibertySiriusXmGroup, lmca:OtherEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-6.0-6.0-1.0-7.0-6.0-7.0-7.0-3.0
Percentage of IncomeLossFromEquityMethodInvestments3.19.71.6-12.7-17.635.013.0-5.2

lmca:LibertySiriusXmGroup, lmca:SiriusXmCanada


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.04.0-5.00.0-1.03.0-2.01.0-1.01.0-3.034-5.03.02.02.02.07.02.01.03.0-7.0
Percentage of IncomeLossFromEquityMethodInvestments-2.1-6.57.90.0-2.9-15.03.71.7-4.5-12.54.821.9-31.2-75.0-6.95.411.1-58.3-6.23.40.018.9

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value145145-10.0-110.0-64.0284-75.0-289.0142354-84.0-28.0-132.0-3.0148-132.038223103-225.0305625.0-73.0277458-97.0-74.03593-117.0-45.0116
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value302914-47.0-4.0608.0-67.0-60.09744-83.0-29.05350-56.0357641-62.010.044
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities20.720.0-140.042.76.221.1-10.723.2-42.327.4-52.4296.422.0-1766.733.842.492.134.139.827.63.371.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value137330-89.0-22.0-94.0243-90.0-73.020276-254.015-164.044-19.0-109.0-21.0137
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities94.5227.6890.020.0146.985.6120.025.314.178.0302.4-53.6124.2-1466.7-12.882.6-55.361.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-22.0-214.065-41.034-19.07.0-149.0182-19.01264061-100.0117332410.099-166.0283-4.0
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities-15.2-147.6-650.037.3-53.1-6.7-9.351.6128.2-5.4-150.0-142.9-46.23333.379.1-25.063.24.596.173.892.8-6.5

us-gaap:IncreaseDecreaseInOperatingAssets

us-gaap:IncreaseDecreaseInOperatingAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value20634-58.0-22.06419-88.0202.097-45.0-42.045-8.0-54.0-22.0282367-15.0134222.0172827-45.0-65.0-11.0-66.0-124.085227.0
Percentage of IncreaseDecreaseInOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingAssets lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value13-19.0-25.03.057-23.0-11.00.0-14.01716-10.03615-22.0-21.048123.0-38.0251.0
Percentage of IncreaseDecreaseInOperatingAssets6.3-55.943.1-13.689.1-121.112.50.0-700.017.5-35.623.880.0-187.540.795.5171.452.24.5253.318.74.5

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value325125-58.03.01.034-48.0-14.02968-49.01.08.0-37.021-2.00.0-2.0
Percentage of IncreaseDecreaseInOperatingAssets157.8367.6100.0-13.61.6178.954.5-70.01450.070.1108.9-2.417.8462.5-38.99.10.0-8.7

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-132.0-72.025-28.06.08.0-29.034-13.012-12.0-33.01.014-53.01.0-20.013661811422
Percentage of IncreaseDecreaseInOperatingAssets-64.1-211.8-43.1127.39.442.133.0170.0-650.012.426.778.62.2-175.098.1-4.5-71.456.598.5-120.085.1100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements lmca:EconomicPerformanceGroup

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value9000000.010000000.010000000.010000000.010000000.010000000.09000000.09000000.010000000.010000000.010000000.010000000.09000000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value5000000.01000000.02000000.02000000.02000000.01000000.01000000.02000000.02000000.07000000.06000000.01000000.01000000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements55.610.020.020.020.010.011.122.220.070.060.010.011.1

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1000000.04000000.04000000.04000000.04000000.05000000.04000000.04000000.04000000.04000000.04000000.02000000.02000000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements11.140.040.040.040.050.044.444.440.040.040.020.022.2

us-gaap:OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax us-gaap:FinancialInstrument

us-gaap:OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax

lmca:DebtMeasuredAtFairValue


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value2727512-16.0
Percentage of OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0-6000000.0-1000000.01000000.01000000.02000000.000-1000000.0-2000000.000-1000000.0-2000000.001000000.0-4000000.0-1000000.00-3000000.06000000.02000000.0-2000000.04000000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax0.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-24.0-10.053-58.00.0-3.0303.01.0-17.042-48.06.0-4.05.0-12.0-20.0-3.00.0-5.0-8.0-6.015-6.042-39.0-65.00.0-5.0-83.08.0-4.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value0.0-3.0-10.0-3.0-4.0-1.0295.0-3.0-11.0-8.0-2.00.0-1.0-1.0-1.0-1.0
Percentage of OtherNoncashIncomeExpense-0.030.0-18.95.20.033.396.7166.7-300.064.7-160.016.7-0.033.320.012.516.7

lmca:LibertyFormulaOneGroup


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-3.09.0-2.08.0-1.01.00.04.0-6.020-11.0-1.02.0-1.0-2.01.04.0
Percentage of OtherNoncashIncomeExpense30.017.03.40.033.33.30.0400.035.347.622.9-16.7-50.0-20.016.7-5.0-133.3

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-27.0-4.054-56.0-1.0-1.00.040-34.02.0-4.06.0-1.0-20.0-6.01.0-5.0-6.0-5.0
Percentage of OtherNoncashIncomeExpense112.540.0101.996.60.033.30.095.270.833.3100.0120.08.3100.0200.00.0100.075.083.3

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value3.0-16.0-3.0-2.07.08.05.02.0-49.0121.0130-11.03117-15.03.0-32.0188.0141739-35.0-1.0-58.07.0590.0-66.074
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-31
Value0.02.0-22.00.0-1.03.04.0-12.03.0-1.0241.0-23.0-3.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.066.7137.5-0.0-12.560.0200.024.525.0-100.077.45.9153.3-100.0

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value1.01.06.0-3.0-2.03.013-1.00.01.01077.00.00.00.04.04.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.033.3-37.5100.0100.042.9162.5-20.00.0100.082.3-63.60.00.0-0.0133.328.6

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1617161617191515141515151515
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest lmca:EconomicPerformanceGroup

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1617161617191515141515151515
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired dei:LegalEntity, us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

lmca:SiriusXmHoldings, lmca:EWScrippsCompany


None
Period End2020-07-13
Value265
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0

lmca:SiriusXmHoldings, lmca:Simplecast


None
Period End2020-06-16
Value28
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value11888172117108113138741028911014111015625015893671203775644142456675683826
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value192431223515181.08.06.0294543102175925637446.04335
Percentage of PaymentsToAcquireProductiveAssets16.127.318.018.832.413.313.01.47.86.726.431.939.165.470.058.260.255.236.716.257.354.7

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value122.017163.08.03.08.02.01.00.08.01.0
Percentage of PaymentsToAcquireProductiveAssets10.22.39.913.72.87.12.210.82.01.10.05.70.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8762124797090117659282818865547465373044303130
Percentage of PaymentsToAcquireProductiveAssets73.770.572.167.564.879.684.887.890.292.173.662.459.134.629.641.139.844.836.781.141.346.9

us-gaap:PaymentsToAcquireProductiveAssets lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems

lmca:LibertyBravesGroup, us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value1924223515
Percentage of PaymentsToAcquireProductiveAssets16.127.318.832.413.3

us-gaap:PaymentsToAcquireProductiveAssets lmca:EconomicPerformanceGroup, us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

lmca:LibertyFormulaOneGroup, us-gaap:OperatingSegments, lmca:FormulaOne


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.02.02.03.08.0
Percentage of PaymentsToAcquireProductiveAssets1.72.31.72.87.1

lmca:LibertySiriusXmGroup, us-gaap:OperatingSegments, lmca:SiriusXmHoldings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value8762797090
Percentage of PaymentsToAcquireProductiveAssets73.770.567.564.879.6

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


None
Period End2020-06-052017-06-302017-03-312016-12-312016-09-30
Value75438815500.00.0
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.00.00.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-13.0-7.00.0-37.0-22.05.0-4.050-68.04.03.05.0-33.02.05.0131.00.0-6.010.0-19.0-8.08.012-36.09.08.0-65.07.03.00.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-03-31
Value-3.0-1.0-1.01.0-2.0-5.0-50.01.0559.08.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities23.114.30.0-2.70.00.0151.550.01100.069.280.0

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-31
Value-8.0-4.0-2.00.03.03.0-4.05.0-3.0-1.0-14.00.01001.0-101.04.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities61.557.10.0-0.00.00.018.2100.075.0-2.020.60.0-303.050.0-2020.030.8

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2.0-2.03.0-38.0-5.02.00.00.0-1.051-46.04.02.05.0-83.00.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities15.428.60.0102.70.00.0-0.00.025.0102.067.6100.066.7100.0251.50.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value3.010.05316301721551.02349.01.0141.03.068120.00.04062730.087
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value3.010.0530.01.02349.01.0141.03.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

lmca:QurateRetailTripcoLibertyBroadbandExpediaHoldingsGciLiberty


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.010.07.0238.08.09.08.05.08.07.06.07.05.0
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty dei:LegalEntity, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

lmca:SiriusXmHoldings, lmca:PandoraSoundcloudAdvertisingAgreement, lmca:SoundcloudHoldingsLlc


None
Period End2020-06-302019-06-30
Value10.09.0
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0

us-gaap:RestructuringCharges dei:LegalEntity

us-gaap:RestructuringCharges

lmca:SiriusXmHoldings


None
Period End2020-06-30
Value24
Percentage of RestructuringCharges100.0

us-gaap:RevenueFromRelatedParties dei:LegalEntity, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

lmca:SiriusXmHoldings, lmca:PandoraSoundcloudAdvertisingAgreement, lmca:SoundcloudHoldingsLlc


None
Period End2020-03-312019-03-31
Value123.0
Percentage of RevenueFromRelatedParties100.0100.0

us-gaap:RevenueFromRelatedParties dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty

lmca:SiriusXmHoldings, lmca:SiriusXmCanada


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value23252525242425252324
Percentage of RevenueFromRelatedParties0.0208.30.00.00.0800.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0060.1370.3750.00.00.0070.0050.00.00.0460.0160.00.00.1680.0050.004
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0131.6810.7280.00.02.2310.0220.00.02.0260.0760.00.02.263
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod216.71227.0194.10.00.031871.4440.00.00.04404.3475.00.00.01347.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0130.3881.1070.00.00.4910.0330.00.00.6330.1150.00.920.1480.0440.025
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod216.7283.2295.20.00.07014.3660.00.00.01376.1718.80.00.088.1880.0625.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod lmca:EconomicPerformanceGroup, us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock

lmca:LibertyBravesGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.00.1370.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod0.0100.00.0

lmca:LibertyFormulaOneGroup, lmca:Formula1Employees, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.01.4350.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod0.01047.40.0

lmca:LibertyFormulaOneGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.00.2460.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod0.0179.60.0

lmca:LibertySiriusXmGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.00.3880.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod0.0283.20.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue lmca:EconomicPerformanceGroup, us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

lmca:LibertyBravesGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.04.67e-060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.0

lmca:LibertyFormulaOneGroup, lmca:Formula1Employees, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.07.55e-060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0161.70.0

lmca:LibertyFormulaOneGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.07.55e-060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0161.70.0

lmca:LibertySiriusXmGroup, srt:ChiefExecutiveOfficer, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-09-30
Value0.08.720000000000001e-060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0186.70.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5.0511.19-0.14-0.160.1511.52-1.40.88-5.0417.5300.1-1.9610.91-0.070
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value019.94-0.18-0.010.4719.51-0.26-0.060.119.65-0.030.152.5415.080.080.55
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice0.0178.2128.66.3313.3169.418.6-6.8-2.0112.10.0150.0-129.6138.2-114.30.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.7123.76-0.91-0.562.2419.65-0.20.140.3719.50.340.381.915.52-0.420.47
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice93.3212.3650.0350.01493.3170.614.315.9-7.3111.20.0380.0-96.9142.3600.00.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0520.071.20027.730.20023.34-0.080023.450.660.16
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0

lmca:LibertyFormulaOneGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0328.612.440033.94-0.010031.560.060033.98
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice60.0142.6203.30.00.0122.4-5.00.00.0135.2-75.00.00.0144.9

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.2639.874.550040.53-0.160042.50.530-2.0939.210.250.06
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice-520.0198.7379.20.00.0146.2-80.00.00.0182.1-662.50.00.0167.237.937.5

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised lmca:EconomicPerformanceGroup, us-gaap:StatementClassOfStock

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

lmca:LibertyBravesGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8000.03000.0252000.052000.039000.015000.02000.003000.01000.0009000.012000.01000.018000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0

lmca:LibertySiriusXmGroup, us-gaap:CommonClassA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value017000.01184000.0104000.032000.061000.09000.026000.0149000.039000.012000.045000.0193000.0142000.098000.073000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised0.0566.7469.8200.082.1406.7450.00.04966.73900.00.00.02144.41183.39800.0405.6

lmca:LibertySiriusXmGroup, us-gaap:CommonClassC


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value83000.036000.02581000.0199000.068000.075000.027000.027000.0347000.096000.057000.0133000.0294000.0326000.0379000.0106000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised1037.51200.01024.2382.7174.4500.01350.00.011566.79600.00.00.03266.72716.737900.0588.9

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-31
Value0.01386968842229815018731653-3.0-242.0-58.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-31
Value0.01386968842229815018731653-3.0-242.0-58.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityOther

us-gaap:StockholdersEquityOther


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2220-94.082242.00.056652.0-1.0-1.01.00.01.01.0-6.01.00.0-2.014
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1.02.0-97.066372.0-121.04150-1.00.0-1.01.00.01.01.03.01.064-66.014
Percentage of StockholdersEquityOther4.510.0103.280.5154.2100.00.073.276.9-50.0-0.0100.0100.00.0100.0100.0-50.0100.00.03300.0100.0

us-gaap:NoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value15173.01624341515-1.0
Percentage of StockholdersEquityOther68.285.0-3.219.5100.00.026.823.1-50.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312015-03-31
Value6.01.00.00.00.04.064
Percentage of StockholdersEquityOther27.35.00.00.00.0200.0-3200.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

lmca:LibertyBravesGroupCommonClass


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value1010101010101010101010101010
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:LibertyBravesGroupCommonClassB


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value0.9818140.9818240.9818240.981860.981860.981860.981860.981860.981860.981860.981860.981860.9867910.986791
Percentage of EntityCommonStockSharesOutstanding9.59.59.59.69.69.69.69.69.69.69.69.69.69.6

lmca:LibertyBravesGroupCommonClassC


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value3939393939393939393939383838
Percentage of EntityCommonStockSharesOutstanding387.2387.2386.9387.6387.9388.0387.9387.9387.9387.9387.8373.3373.5373.5

lmca:LibertyFormulaOneGroupCommonClass


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value2525252525252525252525252525
Percentage of EntityCommonStockSharesOutstanding250.5250.5250.5250.4250.6250.5250.6250.6250.5250.4250.4250.4250.4250.2

lmca:LibertyFormulaOneGroupCommonClassB


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value2.4481152.4481412.4481412.4489032.4491852.4534852.4534852.4534852.4541262.4544482.4544482.4544482.4667782.466778
Percentage of EntityCommonStockSharesOutstanding23.723.723.723.823.923.923.924.024.024.024.024.024.124.1

lmca:LibertyFormulaOneGroupCommonClassC


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value203203203203203202202202202202202201186173
Percentage of EntityCommonStockSharesOutstanding1972.71972.71972.11977.41979.41980.11980.41980.51979.81979.71979.11967.01825.71698.7

lmca:LibertySiriusXmGroupCommonClass


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value101101102102102102102102102102102102102102
Percentage of EntityCommonStockSharesOutstanding983.5983.5993.51002.51003.41003.51003.61003.51003.51002.91002.71002.61002.41001.2

lmca:LibertySiriusXmGroupCommonClassB


None
Period End2020-07-312020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312017-04-30
Value9.8081059.8082329.8082329.8107779.8147779.8215319.8215319.8215319.8215319.8215319.8215319.8215319.8708569.870856
Percentage of EntityCommonStockSharesOutstanding95.195.195.195.595.795.895.995.995.995.995.995.996.496.4

lmca:LibertySiriusXmGroupCommonClassC


None
Period End2020-07-312020-04-302020-01-31
Value232202203
Percentage of EntityCommonStockSharesOutstanding2252.31962.71969.0

lmca:DeferredTaxLiabilitiesAssetsNoncurrent

lmca:DeferredTaxLiabilitiesAssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value200419641913187218241750165116101551151014782025
Percentage of DeferredTaxLiabilitiesAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:DeferredTaxLiabilitiesAssetsNoncurrent lmca:EconomicPerformanceGroup

lmca:LibertyBravesGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value444961787073697368686248
Percentage of DeferredTaxLiabilitiesAssetsNoncurrent2.22.53.24.23.84.24.24.54.44.54.22.4

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value199219471890185618091734167316071569152314471967
Percentage of DeferredTaxLiabilitiesAssetsNoncurrent99.499.198.899.199.299.1101.399.8101.2100.997.997.1

lmca:DeferredTaxLiabilitiesAssetsNoncurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-32.0-32.0-38.0-62.0-55.0-57.0
Percentage of DeferredTaxLiabilitiesAssetsNoncurrent-1.6-1.6-2.0-3.3-3.0-3.3

lmca:IndefiniteLivedIntangibleAssetsTotal

lmca:IndefiniteLivedIntangibleAssetsTotal


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-03-312012-12-31
Value2996129944299442995729953299322806028060280572805728057280692807227986240182401824018240182401824018240182401824018240642403823889344
Percentage of IndefiniteLivedIntangibleAssetsTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lmca:IndefiniteLivedIntangibleAssetsTotal lmca:EconomicPerformanceGroup

lmca:LibertyFormulaOneGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value39563956395639563956395639563956395639563956396839683968
Percentage of IndefiniteLivedIntangibleAssetsTotal13.213.213.213.213.213.214.114.114.114.114.114.114.114.2

lmca:LibertySiriusXmGroup


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value25682256652566525678256742565323781237812377823778237782377823781236952369523695236952369523695
Percentage of IndefiniteLivedIntangibleAssetsTotal85.785.785.785.785.785.784.8