Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenue	[1]	$ 422		$ 433		$ 798		$ 811
Adjusted EBITDA		128		109		217		189
Depreciation		(23)		(21)		(46)		(41)
Amortization of intangible assets		(7)		(8)		(15)		(16)
Stock-based compensation		(32)		(31)		(60)		(61)
Operating income		66		49		96		71
Other income (expense), net		2		(7)		5		(8)
Income before income taxes		68		42		101		63
Provision for income taxes		(34)		(10)		(41)		(27)
Net income		34		32		60		36
Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue	[1]	254		272		508		524
Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue	[1]	125		98		206		161
Other
Segment Reporting Information [Line Items]
Revenue	[2]	43		63		84		126
Adjusted EBITDA	[2]	13		8		22		15
Reportable Segments | Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue		254	[3]	272	[4]	508	[3]	524	[4]
Adjusted EBITDA		108	[3]	85	[4]	212	[3]	162	[4]
Reportable Segments | Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue		125		98		206		161
Adjusted EBITDA		7		16		(17)		12
Corporate and Unallocated
Segment Reporting Information [Line Items]
Depreciation		(23)		(21)		(46)		(41)
Amortization of intangible assets		(7)		(8)		(15)		(16)
Stock-based compensation		$ (32)		$ (31)		$ (60)		$ (61)

[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 $17 million and $31 million and TripAdvisor-branded advertising expenses (primarily television advertising) of $26 million and $55 million for the three and six months ended June 30, 2019, respectively.

[4] Includes unallocated corporate general and administrative costs of $19 million and $39 million and TripAdvisor-branded advertising expenses (primarily television advertising) of $35 million and $61 million for the three and six months ended June 30, 2018, respectively.