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Debt (Details 2) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
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| SIRIUS XM | 听 |
| Debt Instrument [Line Items] | 听 |
| Shares pledged as collateral under loan |
150.0lmca_Sharespledgedascollateralunderloan / invest_InvestmentIssuerAxis = lmca_SiriusXmMember |
| Share value |
$ 525us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue / invest_InvestmentIssuerAxis = lmca_SiriusXmMember |
| Live Nation | 听 |
| Debt Instrument [Line Items] | 听 |
| Shares pledged as collateral under loan |
12.0lmca_Sharespledgedascollateralunderloan / invest_InvestmentIssuerAxis = lmca_LiveNationMember |
| Share value |
313us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue / invest_InvestmentIssuerAxis = lmca_LiveNationMember |
| Time Warner Inc | 听 |
| Debt Instrument [Line Items] | 听 |
| Shares pledged as collateral under loan |
3.6lmca_Sharespledgedascollateralunderloan / invest_InvestmentIssuerAxis = lmca_TimeWarnerIncMember |
| Share value |
309us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue / invest_InvestmentIssuerAxis = lmca_TimeWarnerIncMember |
| Viacom, Inc. | 听 |
| Debt Instrument [Line Items] | 听 |
| Shares pledged as collateral under loan |
3.5lmca_Sharespledgedascollateralunderloan / invest_InvestmentIssuerAxis = lmca_ViacomIncMember |
| Share value |
266us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue / invest_InvestmentIssuerAxis = lmca_ViacomIncMember |
| Time, Inc. [Member] | 听 |
| Debt Instrument [Line Items] | 听 |
| Shares pledged as collateral under loan |
1.0lmca_Sharespledgedascollateralunderloan / invest_InvestmentIssuerAxis = lmca_TimeInc.Member |
| Share value |
$ 13us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue / invest_InvestmentIssuerAxis = lmca_TimeInc.Member |
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- Definition
Shares pledged as collateral under loan No definition available.
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- Definition
The fair value as of the balance sheet date of financial instruments and other positions owned by the entity and pledged to counterparties as collateral, including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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