Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Description of Business (Details)

v3.19.2
Basis of Presentation - Description of Business (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Liberty Media        
Related Party Transaction, Amounts of Transaction $ 1 $ 1 $ 2 $ 2