Business Description and Basis of Presentation - Additional Information (Details) shares in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) Market Vote / shares shares	Mar. 31, 2020 USD ($)
Description Of Business And Basis Of Presentation [Line Items]
Number of markets with localized versions of website | Market	50
Restructuring and other related reorganization costs		$ 9,000,000
Liberty Tripadvisor Holdings, Inc.
Description Of Business And Basis Of Presentation [Line Items]
Beneficially ownership of shares of common stock | shares	16.4
Percentage taken from outstanding shares of common stock	13.30%
Percentage of beneficially ownership of shares of common stock class B	21.40%
Right to voting	one vote per share
Vote per common stock share | Vote / shares	1
Beneficially ownership of equity securities	57.30%
Related party transactions	$ 0	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
Selling and Marketing Expense
Description Of Business And Basis Of Presentation [Line Items]
Restructuring and other related reorganization costs		4,000,000
Technology and Content Expense
Description Of Business And Basis Of Presentation [Line Items]
Restructuring and other related reorganization costs		4,000,000
General and Administrative Expense
Description Of Business And Basis Of Presentation [Line Items]
Restructuring and other related reorganization costs		$ 1,000,000