Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - SIRIUS XM (Details)

v3.10.0.1
Stock-Based Compensation - SIRIUS XM (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
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)     1 year 10 months 24 days  
Stock-based compensation $ 46 $ 85 $ 145 $ 182
Total unrecognized compensation cost related to unvested equity awards $ 31   $ 31  
SIRIUS XM        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding options 244   244  
Exercisable options 136   136  
Outstanding WAEP $ 4.19   $ 4.19  
Exercisable WAEP $ 3.56   $ 3.56  
Outstanding options, aggregate intrinsic value $ 532   $ 532  
Exercisable Options, Aggregate Intrinsic Value 376   $ 376  
Weighted average period of recognition related to unvested equity awards (in years)     1 year 9 months 18 days  
Stock-based compensation 30 $ 35 $ 100 $ 94
Total unrecognized compensation cost related to unvested equity awards $ 275   $ 275  
SIRIUS XM | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Restricted stock granted     15  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 6.56