CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2023		88.8
Beginning balance at Dec. 31, 2023	$ 1,714.1	$ 0.1	$ 1,998.0	$ (68.5)	$ (215.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(101.0)			(101.0)
Other comprehensive income (loss), net of tax	(26.1)				(26.1)
Stock compensation	15.1		15.1
Net share settlement tax payments from issuance of stock to employees	(10.4)		(10.4)
Issuance of common stock (in shares)		0.6
Other	0.2		0.2
Ending balance (in shares) at Mar. 31, 2024		89.4
Ending balance at Mar. 31, 2024	1,591.9	$ 0.1	2,002.9	(169.5)	(241.6)
Beginning balance (in shares) at Dec. 31, 2023		88.8
Beginning balance at Dec. 31, 2023	1,714.1	$ 0.1	1,998.0	(68.5)	(215.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(267.3)
Other comprehensive income (loss), net of tax	37.4
Ending balance (in shares) at Sep. 30, 2024		89.7
Ending balance at Sep. 30, 2024	1,513.5	$ 0.1	2,027.3	(335.8)	(178.1)
Beginning balance (in shares) at Mar. 31, 2024		89.4
Beginning balance at Mar. 31, 2024	1,591.9	$ 0.1	2,002.9	(169.5)	(241.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(138.4)			(138.4)
Other comprehensive income (loss), net of tax	(7.4)				(7.4)
Stock compensation	15.0		15.0
Issuance of common stock (in shares)		0.1
Issuance of common stock	0.0
Ending balance (in shares) at Jun. 30, 2024		89.5
Ending balance at Jun. 30, 2024	1,461.1	$ 0.1	2,017.9	(307.9)	(249.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(27.9)			(27.9)
Other comprehensive income (loss), net of tax	70.9				70.9
Stock compensation	13.0		13.0
Issuance of common stock under employee stock plan (in shares)		0.2
Net share settlement tax payments from issuance of stock to employees	(3.6)		(3.6)
Ending balance (in shares) at Sep. 30, 2024		89.7
Ending balance at Sep. 30, 2024	$ 1,513.5	$ 0.1	2,027.3	(335.8)	(178.1)
Beginning balance (in shares) at Dec. 31, 2024	89.7	89.7
Beginning balance at Dec. 31, 2024	$ 1,362.4	$ 0.1	2,042.2	(397.0)	(282.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(562.9)			(562.9)
Other comprehensive income (loss), net of tax	44.7				44.7
Stock compensation	14.6		14.6
Issuance of common stock under employee stock plan (in shares)		0.8
Ending balance (in shares) at Mar. 31, 2025		90.5
Ending balance at Mar. 31, 2025	$ 858.8	$ 0.1	2,056.8	(959.9)	(238.2)
Beginning balance (in shares) at Dec. 31, 2024	89.7	89.7
Beginning balance at Dec. 31, 2024	$ 1,362.4	$ 0.1	2,042.2	(397.0)	(282.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(953.7)
Other comprehensive income (loss), net of tax	$ 112.5
Ending balance (in shares) at Sep. 30, 2025	92.2	92.2
Ending balance at Sep. 30, 2025	$ 580.8	$ 0.1	2,101.8	(1,350.7)	(170.4)
Beginning balance (in shares) at Mar. 31, 2025		90.5
Beginning balance at Mar. 31, 2025	858.8	$ 0.1	2,056.8	(959.9)	(238.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(374.9)			(374.9)
Other comprehensive income (loss), net of tax	82.6				82.6
Stock compensation	22.7		22.7
Issuance of common stock under employee stock plan (in shares)		0.3
Ending balance (in shares) at Jun. 30, 2025		90.8
Ending balance at Jun. 30, 2025	589.2	$ 0.1	2,079.5	(1,334.8)	(155.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15.9)			(15.9)
Other comprehensive income (loss), net of tax	(14.8)				(14.8)
Stock compensation	$ 22.3		22.3
Issuance of common stock under employee stock plan (in shares)		1.4
Ending balance (in shares) at Sep. 30, 2025	92.2	92.2
Ending balance at Sep. 30, 2025	$ 580.8	$ 0.1	$ 2,101.8	$ (1,350.7)	$ (170.4)