Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue (Note 2, Note 18)	[1]	$ 1,788	$ 1,492	$ 902
Costs and expenses:
Cost of revenue (1) (exclusive of depreciation and amortization as shown separately below)		149	116	74
Selling and marketing		940	784	469
Technology and content		273	222	212
General and administrative		191	172	167
Depreciation and amortization		87	97	111
Restructuring and other related reorganization costs (Note 7)		22	0	0
Total costs and expenses		1,662	1,391	1,033
Operating income (loss)		126	101	(131)
Other income (expense):
Interest expense		(44)	(44)	(45)
Interest income		47	15	1
Other income (expense), net (Note 16)		(4)	(5)	(10)
Total other income (expense), net		(1)	(34)	(54)
Income (loss) before income taxes		125	67	(185)
(Provision) benefit for income taxes (Note 10)		(115)	(47)	37
Net income (loss)		$ 10	$ 20	$ (148)
Earnings (loss) per share attributable to common stockholders (Note 15):
Basic		$ 0.07	$ 0.14	$ (1.08)
Diluted		$ 0.08	$ 0.14	$ (1.08)
Numerator used to compute net income (loss) per share attributable to common stockholders (Note 15):
Basic		$ 10	$ 20	$ (148)
Diluted		$ 11	$ 21	$ (148)
Weighted average common shares outstanding (Note 15):
Basic		139,412	139,923	137,234
Diluted		144,815	145,670	137,234

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