Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue	[1]	$ 428		$ 458		$ 1,225		$ 1,269
Adjusted EBITDA		129		146		347		335
Depreciation		(23)		(20)		(69)		(61)
Amortization of intangible assets		(9)		(8)		(23)		(24)
Stock-based compensation		(29)		(29)		(91)		(90)
Operating income		68		89		164		160
Other income (expense), net		5		(2)		9		(10)
Income before income taxes		73		87		173		150
Provision for income taxes		(23)		(18)		(63)		(45)
Net income		50		69		110		105
Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue	[1]	238		270		746		795
Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue	[1]	141		118		346		278
Other
Segment Reporting Information [Line Items]
Revenue	[2]	49		70		133		196
Adjusted EBITDA	[2]	21		21		42		37
Reportable Segments | Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue		238	[3]	270	[4]	746	[3]	795	[4]
Adjusted EBITDA		93	[3]	97	[4]	306	[3]	259	[4]
Reportable Segments | Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue		141		118		346		278
Adjusted EBITDA		15		28		(1)		39
Corporate and Unallocated
Segment Reporting Information [Line Items]
Depreciation		(23)		(20)		(69)		(61)
Amortization of intangible assets		(9)		(8)		(23)		(24)
Stock-based compensation		$ (29)		$ (29)		$ (91)		$ (90)

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

[2] Other consists of the combination of our Rentals, Flights/Cruises/Car Rentals, SmarterTravel and TripAdvisor China business units and does not constitute a reportable segment.

[3] Includes unallocated corporate general and administrative costs of $20 million and $51 million and TripAdvisor-branded advertising expenses (primarily television advertising) of $18 million and $73 million for the three and nine months ended September 30, 2019, respectively.

[4] Includes unallocated corporate general and administrative costs of $18 million and $57 million and TripAdvisor-branded advertising expenses (primarily television advertising) of $37 million and $98 million for the three and nine months ended September 30, 2018, respectively.