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Stock Based Awards and Other Equity Instruments - Summary of Stock Option Activity (Details) - Employee Stock Option
$ / shares in Units, shares in Thousands, $ in Millions
 9 Months Ended
Sep. 30, 2024
USD ($)
$ / shares
shares
Options Outstanding  
Options Outstanding, Beginning balance | shares 3,927
Options Outstanding, Granted | shares 45
Options Outstanding, Exercised | shares (80) [1]
Options Outstanding, Cancelled or expired | shares (1,131)
Options Outstanding, Ending balance | shares 2,761
Options Outstanding, Exercisable | shares 2,193
Options Outstanding, Vested and expected to vest | shares 2,761 [2]
Weighted Average Exercise Price per share  
Options Outstanding, Weighted Average Exercise Price, Beginning Balance | $ / shares $ 35.56
Options Granted, Weighted Average Exercise Price | $ / shares 24.96
Options Exercised, Weighted Average Exercise Price | $ / shares 24.36 [1]
Options Cancelled or expired, Weighted Average Exercise Price | $ / shares 35.76
Options Outstanding, Weighted Average Exercise Price, Ending balance | $ / shares 35.63
Options Exercisable, Weighted Average Exercise Price | $ / shares 39.12
Options Vested and expected to vest, Weighted Average Exercise Price | $ / shares $ 35.63 [2]
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value  
Options Outstanding, Weighted Average Remaining Contractual Life 4 years 6 months
Options Exercisable, Weighted Average Remaining Contractual Life 3 years 8 months 12 days
Options Vested and expected to vest, Weighted Average Remaining Contractual Life 4 years 6 months [2]
Options Outstanding, Aggregate Intrinsic Value | $ $ 0
Options Exercisable, Aggregate Intrinsic Value | $ 0
Options Vested and expected to vest, Aggregate Intrinsic Value | $ $ 0 [2]
[1] Inclusive of approximately 67,000 stock options withheld due to net share settlement to satisfy required employee tax withholding requirements. Potential shares which had been convertible under stock options that were withheld under net share settlement remain in the authorized but unissued pool under the Tripadvisor, Inc. 2023 Stock and Annual Incentive Plan (the “2023 Plan”) and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the consolidated statements of cash flows.
[2] The Company accounts for forfeitures as they occur, rather than estimate expected forfeitures as allowed under GAAP and therefore does not include a forfeiture rate in our vested and expected to vest calculation unless necessary for a performance condition award.