Segment Information - Summary of Segment Information (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	[1]	$ 235		$ 59		$ 358		$ 337
Adjusted EBITDA		25		(74)		(1)		(34)
Depreciation and amortization		(28)		(32)		(57)		(64)
Stock-based compensation		(32)		(25)		(61)		(51)
Operating income (loss)		(35)		(164)		(119)		(191)
Other income (expense), net		(11)		(15)		(22)		(16)
Income (loss) before income taxes		(46)		(179)		(141)		(207)
Income tax benefit		6		26		21		38
Net income (loss)		(40)		(153)		(120)		(169)
Restructuring and other related reorganization costs				(33)				(42)
Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue	[1]	156		38		245		207
Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue	[1]	68		14		95		97
Other
Segment Reporting Information [Line Items]
Revenue		11		7		18		33
Adjusted EBITDA		4		(3)		4		3
Reportable Segments | Hotels, Media & Platform
Segment Reporting Information [Line Items]
Revenue		156	[2]	38	[3]	245	[2]	207	[3]
Adjusted EBITDA		33	[2]	(33)	[3]	30	[2]	20	[3]
Reportable Segments | Experiences & Dining Segment
Segment Reporting Information [Line Items]
Revenue		68		14		95		97
Adjusted EBITDA		(12)		(38)		(35)		(57)
Corporate and Unallocated
Segment Reporting Information [Line Items]
Depreciation and amortization		(28)		(32)		(57)		(64)
Stock-based compensation		$ (32)		(25)		$ (61)		(51)
Restructuring and other related reorganization costs				$ (33)				$ (42)

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

[2] Includes allocated corporate general and administrative costs of $20 million and $36 million and Tripadvisor-branded advertising expenses of $1 million and $2 million for the three and six months ended June 30, 2021, respectively.

[3] Includes allocated corporate general and administrative costs of $16 million and $34 million and Tripadvisor-branded advertising expenses (primarily television advertising) of $1 million and $5 million for the three and six months ended June 30, 2020, respectively.