Annual report pursuant to Section 13 and 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Narrative) (Details)

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Investments In Affiliates Accounted For Using The Equity Method (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jun. 30, 2011
Apr. 03, 2008
Dec. 31, 2010
Live Nation [Member]
Dec. 31, 2011
SIRIUS XM [Member]
Purchase of shares in equity method investee 5.5 78.3    
Equity Method Investment, Quoted Market Value       $ 4,708
Prior Period Income (loss) included in Current Year     $ 12