Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 365.1	$ 390.6	$ 649.1	$ 730.7
Cost of sales	227.2	267.4	397.8	507.8
Gross profit	137.9	123.2	251.3	222.9
Selling, general, and administrative expenses	44.2	41.4	87.3	88.6
Research and technical expenses	7.8	7.3	15.5	14.1
Restructuring and other (income) charges, net	21.9	13.1	34.2	75.9
Goodwill impairment charge	183.8	349.1	183.8	349.1
Acquisition-related costs	0.0	(0.2)	0.0	0.1
Other (income) expense, net	4.3	23.9	8.4	56.1
Interest expense, net	18.6	23.2	38.0	45.5
Income (loss) before income taxes	(142.7)	(334.6)	(115.9)	(406.5)
Provision (benefit) for income taxes	3.8	(50.9)	10.1	(66.8)
Net income (loss)	$ (146.5)	$ (283.7)	$ (126.0)	$ (339.7)
Per share data
Basic earnings (loss) per share (usd per share)	$ (4.02)	$ (7.81)	$ (3.46)	$ (9.36)
Diluted earnings (loss) per share (usd per share)	$ (4.02)	$ (7.81)	$ (3.46)	$ (9.36)