Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v2.4.0.8
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Common Class A
Dec. 31, 2013
Common Class A
Jun. 30, 2014
SIRIUS XM
Jun. 30, 2013
SIRIUS XM
Jun. 30, 2014
SIRIUS XM
Jun. 30, 2013
SIRIUS XM
Jul. 23, 2014
Subsequent Event
Series C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares issued during the period for each share of Series A and Series B stock held by shareholders prior to the distribution                     2
Granted         1,000            
Weighted average grant-date fair value         $ 38.86            
Vesting period         4 years            
Total unrecognized compensation cost related $ 43   $ 43       $ 239   $ 239    
Cost not yet recognized, weighted average period     1 year 7 months 6 days           2 years 2 months    
Outstanding options         3,471,000 3,656,000 252,000,000   252,000,000    
Exercisable options         2,352,000   104,000,000   104,000,000    
Outstanding WAEP         $ 0 $ 91.74 $ 2.44   $ 2.44    
Exercisable WAEP         $ 90.23   $ 2.15   $ 2.15    
Outstanding, Aggregate intrinsic value 155   155       300   300    
Aggregate intrinsic value 109   109       169   169    
Share-based Compensation $ 49 $ 48 $ 98 $ 89     $ 35 $ 33 $ 71 $ 59  
Series C option exercise price as compared to the Series A exercise price                     0
option exercise price adjustment                     0