Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - TripCo Incentive Plans (Details)

v3.10.0.1
Stock Based Compensation - TripCo Incentive Plans (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock-based compensation $ 31 $ 27 $ 94 $ 77
Operating expense        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock-based compensation 12 11 38 31
Selling, general and administrative        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock-based compensation 19 16 56 46
Trip Advisor        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock-based compensation $ 29 $ 26 $ 90 $ 72