CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Treasury Stock, at Cost
Beginning balance (in shares) at Dec. 31, 2021		211.2
Beginning balance at Dec. 31, 2021	$ 1,327.4	$ 2.1	$ 2,500.0	$ 6.9	$ (1,181.6)	$ 0.0
Beginning balance (in shares) at Dec. 31, 2021						0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and release of stock awards, net of shares withheld (in shares)		3.7
Exercise of stock options and release of stock awards, net of shares withheld	0.8	$ 0.1	0.7
Issuance of shares from Employee Stock Purchase Plan (in shares)		0.8
Issuance of shares from Employee Stock Purchase Plan	3.1		3.1
Share-based compensation expense for equity classified awards	69.5		69.5
Net (loss) income	(804.8)				(804.8)
Other comprehensive income (loss)	64.5			64.5
Repurchase of common stock (in shares)						3.1
Repurchase of common stock	(31.0)					$ (31.0)
Ending balance (in shares) at Dec. 31, 2022		215.7
Ending balance at Dec. 31, 2022	629.5	$ 2.2	2,573.3	71.4	(1,986.4)	$ (31.0)
Ending balance (in shares) at Dec. 31, 2022						3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and release of stock awards, net of shares withheld (in shares)		4.1
Exercise of stock options and release of stock awards, net of shares withheld	(1.0)		(1.0)
Issuance of shares from Employee Stock Purchase Plan (in shares)		0.7
Issuance of shares from Employee Stock Purchase Plan	1.3		1.3
Share-based compensation expense for equity classified awards	64.6		64.6
Net (loss) income	(837.8)				(837.8)
Other comprehensive income (loss)	$ (11.1)			(11.1)
Ending balance (in shares) at Dec. 31, 2023	217.4	220.5
Ending balance at Dec. 31, 2023	$ (154.5)	$ 2.2	2,638.2	60.3	(2,824.2)	$ (31.0)
Ending balance (in shares) at Dec. 31, 2023	3.1					3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and release of stock awards, net of shares withheld (in shares)		11.1
Exercise of stock options and release of stock awards, net of shares withheld	$ (4.3)	$ 0.1	(4.4)
Issuance of shares from Employee Stock Purchase Plan (in shares)		0.6
Issuance of shares from Employee Stock Purchase Plan	0.9		0.9
Share-based compensation expense for equity classified awards	48.1		48.1
Net (loss) income	(858.2)				(858.2)
Other comprehensive income (loss)	$ (36.2)			(36.2)
Ending balance (in shares) at Dec. 31, 2024	229.1	232.2
Ending balance at Dec. 31, 2024	$ (1,004.2)	$ 2.3	$ 2,682.8	$ 24.1	$ (3,682.4)	$ (31.0)
Ending balance (in shares) at Dec. 31, 2024	3.1					3.1