Business Description and Basis of Presentation - Additional Information (Details) shares in Millions, Restaurant in Millions, Hotel in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2019 Visitor	Jun. 30, 2020 USD ($) Market Language Hotel VacationRental Restaurant ActivityandAttraction Airline Cruise Vote / shares shares
Description Of Business And Basis Of Presentation [Line Items]
Number of markets with localized versions of website | Market		48
Number of languages worldwide | Language		28
Description of user-generated reviews and opinions across broad base of global travel-related businesses		Tripadvisor features 867 million reviews and opinions on 8.7 million places to stay, places to eat and things to do – including 1.5 million hotels, inns, B&Bs and specialty lodging, 786,000 rental properties, 4.6 million restaurants, 1.3 million travel activities and experiences worldwide, 500,000 airlines, and 30,000 cruises.
Number of hotels and accommodations | Hotel		1.5
Number of vacation rentals | VacationRental		786,000
Number of restaurants | Restaurant		4.6
Number of activities and attractions worldwide | ActivityandAttraction		1,300,000
Number of airlines | Airline		500,000
Number of cruises | Cruise		30,000
Number of average monthly unique visitors | Visitor	463
Liberty TripAdvisor Holdings, Inc.
Description Of Business And Basis Of Presentation [Line Items]
Beneficially ownership of shares of common stock | shares		18.2
Percentage taken from outstanding shares of common stock		14.90%
Percentage of beneficially ownership of shares of common stock class B		23.00%
Right to voting		one vote per share
Vote per common stock share | Vote / shares		1
Beneficially ownership of equity securities		58.60%
Related party transactions | $		$ 0
Liberty TripAdvisor Holdings, Inc. | Class B Common Stock
Description Of Business And Basis Of Presentation [Line Items]
Beneficially ownership of shares of common stock | shares		12.8
Percentage taken from outstanding shares of common stock		100.00%
Right to voting		ten votes per share
Vote per common stock share | Vote / shares		10