Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 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) 1 year 3 months 18 days    
Stock-based compensation $ 192.0 $ 230.0 $ 150.0
Total unrecognized compensation cost related to unvested equity awards $ 22.0    
SIRIUS XM      
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 9 months 18 days    
Stock-based compensation $ 133.0 $ 124.0 $ 109.0
SIRIUS XM | Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Term of option 10 years    
Options granted 31.7    
WAEP granted $ 6.59    
Outstanding options 243.4    
Exercisable options 143.8    
Outstanding WAEP $ 4.22    
Exercisable WAEP $ 3.60    
Outstanding options, aggregate intrinsic value $ 392.0    
Exercisable Options, Aggregate Intrinsic Value $ 303.0    
Weighted average grant-date fair value $ 1.45    
Weighted average volatility rate 23.00% 24.00% 22.00%
Total unrecognized compensation cost related to unvested equity awards $ 254.0    
SIRIUS XM | Employee Stock Option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Vesting period 3 years    
SIRIUS XM | Employee Stock Option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Vesting period 4 years    
SIRIUS XM | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Restricted stock granted 17.5    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 6.40