Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Other indefinite lived intangible assets (Details)

v2.4.0.6
Intangible Assets Other indefinite lived intangible assets (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Indefinite-lived Intangible Assets [Line Items]    
Goodwill $ 14,215 $ 200
Goodwill, Acquired During Period 14,015  
SIRIUS XM [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Goodwill 14,015 0
Goodwill, Acquired During Period 14,015 [1]  
Indefinite-Lived Trade Names 930  
ANLBC [Member]
    
Indefinite-lived Intangible Assets [Line Items]    
Goodwill 180 180
Goodwill, Acquired During Period 0  
Indefinite-Lived Franchise Rights $ 143  
[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 1 for further discussion.