Revenue Recognition - Reconciliation of Disaggregated Revenue to Segment Revenue (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 428	$ 458	$ 1,225	$ 1,269
Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	238	270	746	795
Experiences & Dining Segment
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	141	118	346	278
Other
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	49	70	133	196
TripAdvisor-Branded Hotels | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	197	229	624	677
TripAdvisor-Branded Display and Platform | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 41	$ 41	$ 122	$ 118

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