Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Intangible Assets (Goodwill) (Details)

v2.4.0.8
Intangible Assets Intangible Assets (Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]    
Goodwill $ 14,389 $ 14,365
Goodwill, Acquired During Period 24 [1]  
SIRIUS XM
    
Goodwill [Line Items]    
Goodwill 14,164 14,165
Goodwill, Acquired During Period (1) [1]  
Other Goodwill
    
Goodwill [Line Items]    
Goodwill 225 200
Goodwill, Acquired During Period $ 25 [1]  
[1] TruePosition made an acquisition during the three months ended March 31, 2014.