Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue (Note 3)	[1]	$ 262	$ 123
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization as shown separately below)		22	12
Selling and marketing		141	73
Technology and content		54	55
General and administrative		40	38
Depreciation and amortization		25	29
Total costs and expenses		282	207
Operating income (loss)		(20)	(84)
Other income (expense):
Interest expense		(12)	(11)
Interest income and other, net		(1)	(1)
Total other income (expense), net		(13)	(12)
Income (loss) before income taxes		(33)	(96)
(Provision) benefit for income taxes (Note 7)		(1)	16
Net income (loss)		$ (34)	$ (80)
Earnings (loss) per share attributable to common stockholders (Note 11):
Basic		$ (0.24)	$ (0.59)
Diluted		$ (0.24)	$ (0.59)
Weighted average common shares outstanding (Note 11):
Basic		139,092	135,746
Diluted		139,092	135,746

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