Consolidated Statements of Operations - USD ($) shares in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue (Note 4)	[1]	$ 604,000,000		$ 1,560,000,000	$ 1,615,000,000
Costs and expenses:
Cost of revenue	[2],[3]	55,000,000		94,000,000	86,000,000
Selling and marketing	[3]	316,000,000		672,000,000	778,000,000
Technology and content	[3]	220,000,000		293,000,000	275,000,000
General and administrative	[3]	173,000,000		187,000,000	177,000,000
Depreciation and amortization		125,000,000		126,000,000	116,000,000
Impairment of goodwill (Note 8)		3,000,000	[4]	0	0
Restructuring and other related reorganization costs (Note 9)		41,000,000		1,000,000
Total costs and expenses:		933,000,000		1,373,000,000	1,432,000,000
Operating income (loss)		(329,000,000)		187,000,000	183,000,000
Other income (expense):
Interest expense		(35,000,000)		(7,000,000)	(12,000,000)
Interest income		3,000,000		17,000,000	7,000,000
Other income (expense), net (Note 18)		(8,000,000)		(3,000,000)	(5,000,000)
Total other income (expense), net		(40,000,000)		7,000,000	(10,000,000)
Income (loss) before income taxes		(369,000,000)		194,000,000	173,000,000
(Provision) benefit for income taxes (Note 12)		80,000,000		(68,000,000)	(60,000,000)
Net income (loss)		$ (289,000,000)		$ 126,000,000	$ 113,000,000
Earnings (loss) per share attributable to common stockholders (Note 17):
Basic		$ (2.14)		$ 0.91	$ 0.82
Diluted		$ (2.14)		$ 0.89	$ 0.81
Weighted average common shares outstanding (Note 17):
Basic		134,858		138,975	138,116
Diluted		134,858		140,658	140,375

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

[2] Excludes amortization expense as follows:

[3] Includes stock-based compensation expense as follows (Note 15):

[4] Represents a goodwill impairment charge related to our Tripadvisor China reporting unit.