Quarterly report pursuant to Section 13 or 15(d)

Debt (Details 2)

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Debt (Details 2) - Jun. 30, 2015 - $1 billion margin loan due 2014 - USD ($)
shares in Millions, $ in Millions
Total
SIRIUS XM  
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 150.0
Share value $ 560
Live Nation  
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 12.0
Share value $ 330
Time Warner Inc  
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 3.6
Share value $ 316
Time, Inc. [Member]  
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 0.5
Share value $ 12