STATEMENTS OF CONSOLIDATED INCOME - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,172.7	$ 1,514.1	$ 1,585.9
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	941.3	1,215.2	1,300.7
Depreciation and amortization	52.2	49.1	43.9
Selling, general, administrative, research and development	91.2	98.0	96.3
Goodwill impairment	0.0	25.2
Restructuring costs	7.5
Other operating (income) charges, net	(0.6)	0.9	1.4
Total costs and expenses	1,091.6	1,388.4	1,442.3
Operating income	81.1	125.7	143.6
Other expense:
Interest expense	(40.9)	(24.6)	(22.7)
Other expense, net – Note 13	(1.4)	(20.7)	(0.9)
Income before income taxes	38.8	80.4	120.0
Income tax provision	(10.0)	(18.4)	(28.3)
Net income	$ 28.8	$ 62.0	$ 91.7
Net income per common share:
Basic	$ 1.82	$ 3.88	$ 5.53
Diluted	$ 1.81	$ 3.83	$ 5.43
Weighted-average number of common shares outstanding (in thousands):
Basic	15,802	15,997	16,585
Diluted	15,913	16,203	16,874