Organization and Business Description - Additional Information (Details) shares in Millions, Restaurant in Millions, Hotel in Millions		12 Months Ended
	Dec. 11, 2012 shares	Dec. 31, 2017 Vote / shares Market Language Brand Hotel VacationRental Restaurant ActivityandAttraction 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
Number of other media brands with websites | Brand		20
Description of user-generated reviews and opinions across broad base of global travel-related businesses		TripAdvisor-branded websites include tripadvisor.com in the United States and localized versions of the website in 48 markets worldwide and 28 languages worldwide. TripAdvisor features approximately 600 million reviews and opinions on approximately 7.5 million places to stay, places to eat and things to do – including approximately 1.2 million hotels, inns, B&Bs and specialty lodging and 750,000 vacation rentals, 4.6 million restaurants and 915,000 activities and attractions worldwide.
Number of hotels and accommodations | Hotel		1.2
Number of vacation rentals | VacationRental		750,000
Number of restaurants | Restaurant		4.6
Number of activities and attractions worldwide | ActivityandAttraction		915,000
Class B Common Stock
Description Of Business And Basis Of Presentation [Line Items]
Right to voting		10 votes per share
Vote per common stock share | Vote / shares		10
Liberty
Description Of Business And Basis Of Presentation [Line Items]
Common stock purchased by Liberty	4.8
Beneficially ownership of shares of common stock	18.2
Beneficially ownership of shares of Common Stock Class B	12.8
Percentage of interest held by related party		100.00%
LTRIP
Description Of Business And Basis Of Presentation [Line Items]
Beneficially ownership of shares of common stock		18.2
Percentage taken from outstanding shares of common stock		14.40%
Percentage of beneficially ownership of shares of common stock class B		22.30%
Right to voting		one vote per share
Vote per common stock share | Vote / shares		1
Beneficially ownership of equity securities		57.50%
LTRIP | Class B Common Stock
Description Of Business And Basis Of Presentation [Line Items]
Beneficially ownership of shares of common stock		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