Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Disaggregation of Revenue (Details)

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Recent Accounting Pronouncements - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Disaggregation of Revenue [Line Items]    
Revenue $ 433 $ 811
Trip Advisor    
Disaggregation of Revenue [Line Items]    
Revenue 433 811
Trip Advisor | Revenue recognized at a Point in Time | Hotel    
Disaggregation of Revenue [Line Items]    
Revenue 313 612
Trip Advisor | Revenue recognized at a Point in Time | Click-based Advertising and Transaction Revenue    
Disaggregation of Revenue [Line Items]    
Revenue 199 389
Trip Advisor | Revenue recognized at a Point in Time | Display-based Advertising and Subscription Revenue    
Disaggregation of Revenue [Line Items]    
Revenue 80 150
Trip Advisor | Revenue recognized at a Point in Time | Other Hotel Revenue    
Disaggregation of Revenue [Line Items]    
Revenue 34 73
Trip Advisor | Revenue recognized at a Point in Time | Non-Hotel    
Disaggregation of Revenue [Line Items]    
Revenue $ 120 $ 199