Revenue Recognition - Reconciliation of Disaggregated Revenue to Segment Revenue (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 422	$ 433	$ 798	$ 811
Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	254	272	508	524
Experiences & Dining Segment
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	125	98	206	161
Other
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	43	63	84	126
TripAdvisor-Branded Hotels | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	211	231	427	447
TripAdvisor-Branded Display and Platform | Hotels, Media & Platform
Disaggregation Of Revenue [Line Items]
Total Revenue	[1]	$ 43	$ 41	$ 81	$ 77

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