Revenue Recognition - Reconciliation of Disaggregated Revenue to Segment Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 604	$ 1,560	$ 1,615
Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	361	939	1,001
Experiences & Dining Segment
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	186	456	372
Other
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	57	165	242
Tripadvisor-Branded Hotels | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	292	779	848
Tripadvisor-Branded Display and Platform | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 69	$ 160	$ 153

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