Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Income Statement [Abstract]
Revenue (Note 2, Note 18)	[1]	$ 1,835		$ 1,788		$ 1,492
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization as shown separately below)		131		119		78
Marketing		729	[2]	705	[2]	576
Personnel (including stock-based compensation of $120, $96, and $88 - Note 13)		595		570		503
Technology		91	[2]	80	[2]	63
General and administrative		91		79		74
Depreciation and amortization		85		87		97
Restructuring and other related reorganization costs		21		22		0
Total costs and expenses		1,743		1,662		1,391
Operating income (loss)		92		126		101
Other income (expense):
Interest expense		(46)		(44)		(44)
Interest income		48		47		15
Other income (expense), net (Note 16)		(7)		(4)		(5)
Total other income (expense), net		(5)		(1)		(34)
Income (loss) before income taxes		87		125		67
(Provision) benefit for income taxes (Note 10)		(82)		(115)		(47)
Net income (loss)		$ 5		$ 10		$ 20
Earnings (loss) per share attributable to common stockholders (Note 15):
Basic		$ 0.04		$ 0.07		$ 0.14
Diluted		$ 0.04		$ 0.08		$ 0.14
Numerator used to compute earnings (loss) per share attributable to common stockholders (Note 15):
Basic		$ 5		$ 10		$ 20
Diluted		$ 6		$ 11		$ 21
Weighted average common shares outstanding (Note 15):
Basic		139,079		139,412		139,923
Diluted		145,038		144,815		145,670

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

[2] The significant segment expense categories and amounts align with the segment-level information that is regularly provided to our CODM.