Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 390.6	$ 310.3
Cost of sales	303.9	257.2
Gross margin	86.7	53.1
Selling, general and administrative expenses	44.7	39.6
Research and technology expenses	10.9	11.6
Other operating expense	(1.0)	(12.1)
Operating income (loss)	30.1	(10.2)
Interest expense, net	9.1	10.3
Income (loss) before income taxes, and equity in earnings from affiliated companies	21.0	(20.5)
Income tax expense (benefit)	4.7	(7.5)
Income (loss) before equity in earnings from affiliated companies	16.3	(13.0)
Equity in earnings (losses) from affiliated companies	1.5	(1.0)
Net income (loss)	$ 17.8	$ (14.0)
Basic net income (loss) per common share	$ 0.21	$ (0.17)
Diluted net income (loss) per common share	$ 0.21	$ (0.17)
Weighted-average common shares:
Basic	84.3	84.0
Weighted average common shares outstanding - Dilutive (in shares)	84.9	84.0