Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

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Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Dec. 31, 2012
Goodwill [Line Items]      
Goodwill, Purchase Accounting Adjustments $ 18    
Goodwill 14,203 14,203 200
Goodwill, Acquired During Period   14,003  
SIRIUS XM [Member]
     
Goodwill [Line Items]      
Goodwill 14,003 14,003 0
Goodwill, Acquired During Period   14,003 [1]  
ANLBC [Member]
     
Goodwill [Line Items]      
Goodwill 180 180 180
Goodwill, Acquired During Period   0  
Other Goodwill [Member]
     
Goodwill [Line Items]      
Goodwill $ 20 $ 20 $ 20
Minimum [Member]
     
Goodwill [Line Items]      
Finite-Lived Intangible Asset, Useful Life   6 years  
[1] The increase to SIRIUS XM goodwill was the result of the acquisition of a controlling interest in SIRIUS XM in January 2013, see note 2 for further discussion.