Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Description of Business (Details)

v3.19.1
Basis of Presentation - Description of Business (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Liberty Media    
Related Party Transaction, Amounts of Transaction $ 1 $ 1