STATEMENTS OF CONSOLIDATED INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net sales	$ 773.4	$ 814.1	$ 1,510.9	$ 1,621.7
Costs and expenses:
Cost of products sold, excluding depreciation and amortization	690.5	718.4	1,333.4	1,449.5
Depreciation and amortization	29.0	26.4	57.8	52.7
Selling, general, administrative, research and development	31.6	32.2	64.2	61.9
Restructuring costs	6.8	1.2	6.9	2.6
Other operating charges, net			0.4
Total costs and expenses	757.9	778.2	1,462.7	1,566.7
Operating income	15.5	35.9	48.2	55.0
Other (expense) income:
Interest expense	(11.1)	(12.1)	(22.6)	(24.0)
Other (expense) income, net - Note 9	(0.5)	(2.5)	10.4	11.1
Income before income taxes	3.9	21.3	36.0	42.1
Income tax provision	(0.8)	(3.0)	(8.3)	(7.9)
Net income	$ 3.1	$ 18.3	$ 27.7	$ 34.2
Net income per common share:
Basic	$ 0.19	$ 1.14	$ 1.72	$ 2.14
Diluted	$ 0.19	$ 1.14	$ 1.69	$ 2.12
Weighted-average number of common shares outstanding (in thousands):
Basic	16,072	15,974	16,050	15,957
Diluted	16,398	16,083	16,321	16,090