Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.10.0.1
Basis of Presentation (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Qurate Retail, TripCo, Liberty Broadband, Expedia Holdings and GCI Liberty        
Entity Information [Line Items]        
Related Party Transaction, Amounts of Transaction $ 8 $ 6 $ 21 $ 17