Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Disaggregation of Revenue (Details)

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Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue [Line Items]                      
Revenue $ 334 $ 428 $ 422 $ 376 $ 346 $ 458 $ 433 $ 378 $ 1,560 $ 1,615 $ 1,569
Corporate and other                      
Disaggregation of Revenue [Line Items]                      
Revenue                 165 242 283
Tripadvisor                      
Disaggregation of Revenue [Line Items]                      
Revenue                 1,560 1,615  
Tripadvisor | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 456 372  
Tripadvisor | Corporate and other                      
Disaggregation of Revenue [Line Items]                      
Revenue                 165 242  
Hotel, Media & Platform | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 939 1,001 1,022
Hotel, Media & Platform | Tripadvisor | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 939 1,001  
Tripadvisor-branded hotels | Tripadvisor | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 779 848  
Tripadvisor-branded display and platform | Tripadvisor | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 160 153  
Experiences & Dining | Operating Segments                      
Disaggregation of Revenue [Line Items]                      
Revenue                 $ 456 $ 372 $ 264