STATEMENTS OF CONSOLIDATED INCOME (LOSS) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 3,024.0	$ 3,087.0	$ 3,427.9
Costs and expenses:
Cost of products sold, excluding depreciation and amortization	2,691.1	2,754.9	3,180.2
Depreciation and amortization	116.4	108.6	106.9
Selling, general, administrative, research and development	120.8	122.7	110.9
Goodwill impairment	0.0	0.0	20.5
Restructuring costs	7.6	5.0	2.2
Other operating charges, net	0.4	0.0	3.2
Total costs and expenses	2,936.3	2,991.2	3,423.9
Operating income	87.7	95.8	4.0
Other (expense) income:
Interest expense	(43.7)	(46.9)	(48.3)
Other income, net - Note 13	19.5	7.4	6.4
Income (loss) before income taxes	63.5	56.3	(37.9)
Income tax (provision) benefit	(16.7)	(9.1)	8.3
Net income (loss)	$ 46.8	$ 47.2	$ (29.6)
Net income (loss) per common share:
Basic	$ 2.91	$ 2.95	$ (1.86)
Diluted	$ 2.87	$ 2.92	$ (1.86)
Weighted-average number of common shares outstanding (in thousands):
Basic	16,069	15,991	15,906
Diluted	16,319	16,131	15,906