Annual report pursuant to Section 13 and 15(d)

TripAdvisor, Inc. Acquisitions and Dispositions (Details)

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TripAdvisor, Inc. Acquisitions and Dispositions (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Aug. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain (Loss) on Dispositions, Net   $ (18)   $ 19
Buy Seasons | Disposed of by Sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain (Loss) on Dispositions, Net   (18)    
Disposal Group, Including Discontinued Operation, Revenue   13 $ 52 73
Disposal Group Net Earnings Loss   $ (2) (8) $ (21)
Disposal Group Assets     $ 23  
Trip Advisor | Chinese Subsidiary | Disposed of by Sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Sale of Stock, Percentage of Ownership before Transaction 100.00%      
Proceeds from Sale of Other Investments $ 28      
Disposal Group Assets 11      
Cash 3      
Liabilities 4      
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal $ 20