STATEMENTS OF CONSOLIDATED INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 324.0	$ 369.3
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	262.5	286.6
Depreciation and amortization	13.5	13.2
Selling, general, administrative, research and development	31.8	23.9
Restructuring benefit	(0.7)
Total costs and expenses	307.1	323.7
Operating income	16.9	45.6
Other expense:
Interest expense	(12.3)	(6.1)
Other expense, net – Note 11	(0.4)	(0.8)
Income before income taxes	4.2	38.7
Income tax benefit (provision)	0.3	(9.6)
Net income	$ 4.5	$ 29.1
Net income per common share:
Basic	$ 0.28	$ 1.83
Diluted	$ 0.28	$ 1.81
Weighted-average number of common shares outstanding (in thousands):
Basic	15,805	15,838
Diluted	15,987	16,008