Commitments and Contingencies - Additional Information (Details) $ in Millions, $ in Millions			3 Months Ended		12 Months Ended
	Nov. 21, 2024 USD ($)	Apr. 22, 2022 AUD ($)	Dec. 31, 2024 USD ($) lawsuit	Mar. 31, 2022 USD ($)	Dec. 31, 2024 USD ($) lawsuit	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Litigation Relating to Occupancy Tax
Loss Contingencies [Line Items]
Number of lawsuits filed | lawsuit			103		103
Number of lawsuits currently active | lawsuit			2		2
Number of lawsuits dismissed to date | lawsuit					49
Number of dismissals based on finding that defendant was not subject to local hotel occupancy tax or the local government lacked standing to pursue claims | lawsuit					34
Reserve for legal contingencies			$ 3		$ 3		$ 46
Reverse balance increase (decrease)					$ (43)
Matters Relating to International VAT
Loss Contingencies [Line Items]
Reserve for legal contingencies						$ 92
VAT Claims Relating From Fiscal Years 2016 to 2022
Loss Contingencies [Line Items]
Payments for legal contingencies	$ 71
VAT Claims Related From 2023 and 2024
Loss Contingencies [Line Items]
Reverse balance increase (decrease)			$ 15
Breach Of Australian Consumer Law | Affiliated Entity
Loss Contingencies [Line Items]
Trivago to pay penalty		$ 44.7
Estimated probable loss				$ 34				$ 11
Estimate of possible loss, additions				$ 23