Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Additional Information (Details)

v3.2.0.727
Benefit Plans - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
May. 31, 2015
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
shares
Jun. 30, 2015
USD ($)
plan
$ / shares
shares
Jun. 30, 2014
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share-based payment expense   $ 19,524,000 $ 17,787,000 $ 38,941,000 $ 36,027,000  
Number of other share-based benefit plans | plan       4    
Deferred compensation plan   $ 0   $ 0    
Sirius XM Savings Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Minimum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan   1.00%   1.00%    
Maximum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan       50.00%    
Percent of Company match of employee's voluntary contributions       50.00%    
Percent of employee's pre-tax salary       6.00%    
Maximum annual contributions per employee, percent   3.00%   3.00%    
Vesting percentage of employer contributions for each year of employment       33.33%    
Savings plan, fully vested period       3 years    
Contributions by employer   $ 1,513,000 1,254,000 $ 4,540,000 3,133,000  
Employee Stock Option [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share-based payment expense   $ 16,553,000 $ 16,193,000 $ 33,244,000 $ 32,808,000  
Granted, options (in shares) | shares       6,242,000    
Weighted average grant date fair value of options granted (in dollars per share) | $ / shares       $ 0.84 $ 1.09  
Total intrinsic value of stock options exercised       $ 39,795,000 $ 20,435,000  
Number of shares issued as a result of exercise of stock options and vesting of restricted stock units | shares       6,249,000    
Employee Stock Option [Member] | Third Parties [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted, options (in shares) | shares   0 0 0 0  
Restricted Stock Units RSU and Stock Awards [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share-based payment expense   $ 2,971,000 $ 1,594,000 $ 5,697,000 $ 3,219,000  
Weighted average grant date fair value of restricted stock units and stock awards granted | $ / shares       $ 3.88 $ 3.70  
Total intrinsic value of stock awards vested       $ 300,000    
Vested, shares | shares       77,000    
Restricted Stock Units RSU and Stock Options [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total unrecognized compensation costs related to unvested share based payment awards for restricted stock units, net of estimated forfeitures   $ 129,822,000   $ 129,822,000   $ 162,985,000
Weighted average expected period for recognition of compensation expenses       2 years 6 months    
2015 Long-Term Stock Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock conversion to common stock 1          
Common stock available for future grants | shares   393,554,000   393,554,000    
2015 Long-Term Stock Incentive Plan [Member] | Employee Stock Option [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock options expiration term 10 years