Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Schedule of Financial Instruments Owned and Pledged as Collateral) (Details)

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Long-Term Debt (Schedule of Financial Instruments Owned and Pledged as Collateral) (Details) ($1 billion margin loan due 2014, USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
SIRIUS XM
 
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 719.9
Share value $ 2,304
Live Nation
 
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 8.1
Share value 175
Time Warner Inc
 
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 3.6
Share value 237
Viacom, Inc.
 
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 3.5
Share value 300
Time Warner Cable Inc
 
Debt Instrument [Line Items]  
Shares pledged as collateral under loan 1.1
Share value $ 153