Annual report pursuant to Section 13 and 15(d)

Discontinued Operations (Details)

v2.4.1.9
Discontinued Operations (Details) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2012
Jan. 10, 2013
Dec. 31, 2014
Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent $ 254,000,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity      
Net earnings (loss) from discontinued operations 252,000,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax      
Starz, LLC        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from Divestiture of Interest in Consolidated Subsidiaries   1,200,000,000us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_StarzLlcMember
   
Disposal Group, Including Discontinued Operation, Revenue 1,631,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_StarzLlcMember
     
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax 383,000,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_StarzLlcMember
     
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share $ 0.71us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_StarzLlcMember
     
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share $ 0.68us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_StarzLlcMember
     
TruePosition        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Disposal Group, Including Discontinued Operation, Revenue 83,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
  57,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
77,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax 6,000,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
  (6,000,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
1,000,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent 3,000,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
  (8,000,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
2,000,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Cash and cash equivalents       9,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Other current assets       7,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Deferred tax assets       33,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssetsNoncurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Goodwill       11,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillNoncurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Other assets       20,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Accounts payable and accrued liabilities       9,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableAndAccruedLiabilitiesCurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Deferred revenue       39,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredRevenueNoncurrent
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember
Other liabilities       $ 3,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= lmca_TruepositionMember