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Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | 听 | 听 | 听 |
| Fair Value of Assets Acquired | $ 1us-gaap_FairValueOfAssetsAcquired | $ 2,586us-gaap_FairValueOfAssetsAcquired | 听 |
| Indefinite-lived Intangible Assets, Acquired During Period | 24us-gaap_IndefinitelivedIntangibleAssetsAcquired | 23,694us-gaap_IndefinitelivedIntangibleAssetsAcquired | 听 |
| Finite-lived Intangible Assets Acquired | 36us-gaap_FinitelivedIntangibleAssetsAcquired1 | 1,177us-gaap_FinitelivedIntangibleAssetsAcquired1 | 听 |
| LiabilitiesAssumed | (12)us-gaap_LiabilitiesAssumed1 | (5,367)us-gaap_LiabilitiesAssumed1 | 听 |
| Deferred tax liabilities assumed in business combination | (2)lmca_DeferredTaxLiabilitiesAssumedInBusinessCombination | (760)lmca_DeferredTaxLiabilitiesAssumedInBusinessCombination | 听 |
| Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 听 | (10,372)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet | 听 |
| Noncontrolling Interest, Increase from Business Combination | 听 | (10,841)us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination | 听 |
| Payments to Acquire Businesses, Net of Cash Acquired | 47us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 117us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 听 |
| Shares acquired in disposition of subsidiary | 听 | (937)lmca_StockRepurchaseAndRetiredDuringPeriodValueInDispositionOfSubsidiary | 听 |
| Nonmonetary Transaction, Gain (Loss) Recognized on Transfer | 听 | (496)us-gaap_NonmonetaryTransactionGainLossRecognizedOnTransfer | 听 |
| Tax expense (benefit) on exchange transaction | 听 | (5)lmca_Taxexpensebenefitonexchangetransaction | 听 |
| Cash paid in exchange transaction | 听 | 429lmca_Cashincludedinexchangetransaction | 听 |
| Stock repuchased by subsidiary not settled at end of period | 26lmca_StockRepuchasedBySubsidiaryNotSettledAtEndOfPeriod | 听 | 听 |
| Cash paid for interest | 232us-gaap_InterestPaid | 144us-gaap_InterestPaid | 3us-gaap_InterestPaid |
| Cash paid (received) for income taxes | 20us-gaap_IncomeTaxesPaidNet | (75)us-gaap_IncomeTaxesPaidNet | 129us-gaap_IncomeTaxesPaidNet |
| Leisure Arts [Member] | 听 | 听 | 听 |
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | 听 | 听 | 听 |
| Increase (Decrease) in Carrying Value of Assets Received as Consideration in Disposal of Business | 听 |
(19)lmca_Carryingvalueofbusinessdeconsolidated / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = lmca_LeisureArtsMember |
听 |
| Cash held by business deconsolidated | 听 |
$ 12lmca_Cashheldbybusinessdeconsolidated / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = lmca_LeisureArtsMember |
听 |
| X | ||||||||||
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- Definition
Carrying value of business deconsolidated No definition available.
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| X | ||||||||||
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- Definition
Cash held by business deconsolidated No definition available.
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| X | ||||||||||
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- Definition
Cash included in exchange transaction No definition available.
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| X | ||||||||||
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- Definition
Aggregate of Deferred tax liabilities assumed in business combinations throughout the period. No definition available.
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| X | ||||||||||
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- Definition
Stock repuchased by subsidiary not settled at end of period No definition available.
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| X | ||||||||||
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- Definition
The value of shares repurchased and retired during the period in disposition of a subsidiary. No definition available.
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| X | ||||||||||
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- Definition
Tax expense (benefit) on exchange transaction No definition available.
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| X | ||||||||||
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- Definition
Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The fair value of assets acquired in noncash investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination. No definition available.
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| X | ||||||||||
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- Definition
The amount of cash paid for interest during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The fair value of liabilities assumed in noncash investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Increase in noncontrolling interest balance because of a business combination that occurred during the period. No definition available.
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| X | ||||||||||
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- Definition
Disclosure of the difference in values (gain (loss)) between the nonmonetary assets or liabilities exchanged with another entity inclusive of boot (small monetary consideration). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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