Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred Merchant Payables, Certain Risks and Concentrations, Earnings (Loss) per Common Share (Details)

v3.25.0.1
Summary of Significant Accounting Policies - Deferred Merchant Payables, Certain Risks and Concentrations, Earnings (Loss) per Common Share (Details)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
item
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
shares
Dec. 31, 2021
shares
Denominator        
Basic WASO (in shares)   77 76 76
Potentially dilutive shares (in shares)   1 2 1
Diluted WASO (in shares)   78 78 77
Tripadvisor        
Product Information [Line Items]        
Deferred merchant payable | $ $ 255 $ 237    
Number of most significant travel partners | item 2      
Tripadvisor | Expedia and Booking Holdings Inc. | Customer | Revenue        
Product Information [Line Items]        
Customer concentration (as a percent) 22.00% 25.00% 31.00%  
Tripadvisor | Expedia and Booking Holdings Inc. | Customer | Accounts Receivable        
Product Information [Line Items]        
Customer concentration (as a percent) 10.00% 10.00%    
Employee Stock Option        
Earnings (Loss) Per Common Share ("EPS")        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1 2 3