Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - SIRIUS XM (Details)

v3.8.0.1
Stock-Based Compensation - SIRIUS XM (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Weighted average period of recognition related to unvested equity awards (in years)     2 years 4 months 24 days  
Stock-based compensation $ 85 $ 41 $ 182 $ 109
Total unrecognized compensation cost related to unvested equity awards $ 36   $ 36  
SIRIUS XM        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding options 290   290  
Exercisable options 128   128  
Outstanding WAEP $ 3.75   $ 3.75  
Exercisable WAEP $ 3.16   $ 3.16  
Outstanding options, aggregate intrinsic value $ 514   $ 514  
Exercisable Options, Aggregate Intrinsic Value 302   $ 302  
Weighted average period of recognition related to unvested equity awards (in years)     2 years 6 months  
Stock-based compensation 35 $ 30 $ 94 $ 78
Total unrecognized compensation cost related to unvested equity awards $ 281   $ 281  
SIRIUS XM | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Restricted stock granted     32  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 4.55