Revenue Recognition - Reconciliation of Disaggregated Revenue to Segment Revenue (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 235	$ 59	$ 358	$ 337
Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	156	38	245	207
Experiences & Dining Segment
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	68	14	95	97
Other
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	11	7	18	33
Tripadvisor-Branded Hotels | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	131	31	205	168
Tripadvisor-Branded Display and Platform | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 25	$ 7	$ 40	$ 39

[1] Our revenue is recognized primarily at a point in time for all reported segments.