Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 393.0	$ 320.3	$ 783.6	$ 630.6
Cost of sales	303.5	258.4	607.4	515.6
Gross margin	89.5	61.9	176.2	115.0
Selling, general and administrative expenses	33.5	31.1	78.2	70.7
Research and technology expenses	11.3	11.5	22.2	23.1
Other operating (income) expense	(19.1)	3.1	(18.1)	15.2
Operating income (loss)	63.8	16.2	93.9	6.0
Interest expense, net	8.9	9.3	18.0	19.6
Other income	(0.3)		(0.3)
Income (loss) before income taxes, and equity in earnings from affiliated companies	55.2	6.9	76.2	(13.6)
Income tax expense (benefit)	12.7	4.0	17.4	(3.5)
Income (loss) before equity in earnings from affiliated companies	42.5	2.9	58.8	(10.1)
Equity in earnings (losses) from affiliated companies	2.2	(0.7)	3.7	(1.7)
Net income (loss)	$ 44.7	$ 2.2	$ 62.5	$ (11.8)
Basic net income (loss) per common share	$ 0.53	$ 0.03	$ 0.74	$ (0.14)
Diluted net income (loss) per common share	$ 0.53	$ 0.03	$ 0.74	$ (0.14)
Weighted-average common shares:
Basic	84.4	84.1	84.3	84.0
Weighted average common shares outstanding - Dilutive (in shares)	85.0	84.7	84.9	84.0