Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - 401(k) Savings Plan (Details)

v3.19.2
Benefit Plans - 401(k) Savings Plan (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Sirius XM Savings Plan        
Defined Benefit Plan Disclosure [Line Items]        
Minimum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan     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%  
Vesting percentage of employer contributions for each year of employment     33.33%  
Savings plan, fully vested period     3 years  
Recognized cost $ 2 $ 2 $ 4 $ 4
Pandora Plan        
Defined Benefit Plan Disclosure [Line Items]        
Minimum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan     1.00%  
Maximum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan     75.00%