Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenue (Note 3)	[1]	$ 529	$ 497	$ 927	$ 892
Costs and expenses:
Cost of sales (exclusive of depreciation and amortization as shown separately below)		42	40	68	64
Marketing (formerly Selling and marketing)	[2]	218	204	389	366
Personnel (including stock-based compensation of $29, $34, $57 and $61, respectively - Note 9)		149	153	293	303
Technology	[2]	25	22	48	44
General and administrative		13	21	31	50
Depreciation and amortization		23	21	44	42
Restructuring and other related reorganization costs		0	0	10	1
Total costs and expenses		470	461	883	870
Operating income (loss)		59	36	44	22
Other income (expense):
Interest expense		(17)	(11)	(29)	(22)
Interest income		10	13	20	25
Other income (expense), net		(5)	0	(8)	(3)
Total other income (expense), net		(12)	2	(17)	0
Income (loss) before income taxes		47	38	27	22
(Provision) benefit for income taxes (Note 7)		(11)	(14)	(2)	(57)
Net income (loss)		$ 36	$ 24	$ 25	$ (35)
Earnings (loss) per share attributable to common stockholders (Note 11):
Basic		$ 0.29	$ 0.17	$ 0.19	$ (0.25)
Diluted		$ 0.28	$ 0.17	$ 0.19	$ (0.25)
Numerator used to compute net income (loss) per share attributable to common stockholders (Note 11):
Basic		$ 36	$ 24	$ 25	$ (35)
Diluted		$ 36	$ 24	$ 26	$ (35)
Weighted average common shares outstanding (Note 11):
Basic		124,948	139,234	132,959	138,836
Diluted		130,242	145,218	138,663	138,836

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

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