Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.10.0.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Allowance for doubtful accounts $ 21 $ 16  
Customer invoices due 30 days    
Maximum invested cash maturity period 18 months    
Maximum security maturity period 3 years    
Total property and equipment $ 234 226  
Foreign currency exchange gain (loss) (6) 1 $ (4)
Buildings      
Total property and equipment 123 122  
Leasehold improvements      
Total property and equipment 41 39  
Computer equipment and purchased software      
Total property and equipment 52 46  
Furniture, office equipment and other      
Total property and equipment $ 18 $ 19  
Furniture, office equipment and other | Minimum      
Property estimated useful life 3 years    
Furniture, office equipment and other | Maximum      
Property estimated useful life 5 years    
TripAdvisor      
Customer invoices due 30 days    
TripAdvisor | Buildings      
Property estimated useful life 40 years