CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Revenues	$ 620.8	$ 630.1	$ 1,899.0	$ 1,929.1
Costs and expenses
Cost of revenue	168.1	173.9	513.3	537.9
Research and development	99.2	102.2	306.7	304.9
Sales and marketing	149.9	142.8	509.7	427.7
General and administrative	76.8	79.6	196.7	225.7
Impairment charges	29.3	41.6	36.3	51.3
Total costs and expenses	523.3	540.1	1,562.7	1,547.5
Income from operations	97.5	90.0	336.3	381.6
Interest and other, net	33.8	25.2	77.4	76.9
Income before income taxes	63.7	64.8	258.9	304.7
Provision for income taxes	24.4	26.9	80.0	107.0
Net income	39.3	37.9	178.9	197.7
Other comprehensive income (loss)
Foreign currency translation	7.4	(4.1)	1.9	(1.2)
Change in fair value of derivatives	(17.9)	1.1	(15.5)	8.1
Total other comprehensive income (loss)	(10.5)	(3.0)	(13.6)	6.9
Comprehensive income	$ 28.8	$ 34.9	$ 165.3	$ 204.6
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.11	$ 0.10	$ 0.48	$ 0.54
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.11	$ 0.10	$ 0.48	$ 0.54
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	372.2	366.7	371.4	365.8
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	372.5	367.6	371.7	366.3