STATEMENTS OF CONSOLIDATED INCOME (LOSS) (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 743.6	$ 748.9	$ 2,365.3	$ 2,651.9
Costs and expenses:
Cost of products sold, excluding depreciation and amortization	665.2	694.9	2,114.7	2,459.2
Depreciation and amortization	27.2	25.8	79.9	80.4
Selling, general, administrative, research and development	30.5	25.2	92.4	82.9
Restructuring costs	1.6		4.2
Other operating charges, net				3.2
Total costs and expenses	724.5	745.9	2,291.2	2,625.7
Operating income	19.1	3.0	74.1	26.2
Other (expense) income:
Interest expense	(11.4)	(12.1)	(35.4)	(36.5)
Other (expense) income, net Note 9	(2.2)	12.7	8.9	7.4
Income (loss) before income taxes	5.5	3.6	47.6	(2.9)
Income tax provision	(0.1)	(1.1)	(8.0)	(0.3)
Net income (loss)	$ 5.4	$ 2.5	$ 39.6	$ (3.2)
Net income (loss) per common share:
Basic	$ 0.34	$ 0.16	$ 2.48	$ (0.2)
Diluted	$ 0.34	$ 0.16	$ 2.46	$ (0.2)
Weighted-average number of common shares outstanding (in thousands):
Basic	15,995	15,926	15,970	15,897
Diluted	16,154	16,029	16,110	15,897