| Debt (Details) - $1.25 billion margin loan due 2016 shares in Millions, $ in Millions | Mar. 31, 2016  USD ($)  shares | 
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| SIRIUS XM | |
| Debt Instrument [Line Items] | |
| Shares pledged as collateral under loan | shares | 145.4 | 
| Share value | $ | $ 574 | 
| Live Nation | |
| Debt Instrument [Line Items] | |
| Shares pledged as collateral under loan | shares | 4.2 | 
| Share value | $ | $ 95 | 
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- Definition Shares pledged as collateral under loan No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. 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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