STATEMENTS OF CONSOLIDATED INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 737.5	$ 807.6
Costs and expenses:
Cost of products sold, excluding depreciation and amortization	642.9	731.1
Depreciation and amortization	28.8	26.3
Selling, general, administrative, research and development	32.6	29.7
Restructuring costs	0.1	1.4
Other operating charges, net	0.4
Total costs and expenses	704.8	788.5
Operating income	32.7	19.1
Other (expense) income:
Interest expense	(11.5)	(11.9)
Other income, net - Note 9	10.9	13.6
Income before income taxes	32.1	20.8
Income tax provision	(7.5)	(4.9)
Net income	$ 24.6	$ 15.9
Net income per common share:
Basic	$ 1.53	$ 1
Diluted	$ 1.51	$ 0.99
Weighted-average number of common shares outstanding (in thousands):
Basic	16,027	15,940
Diluted	16,230	16,096