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Business Description and Basis of Presentation - Additional Information (Details) shares in Millions | 3 Months Ended
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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

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