STATEMENTS OF CONSOLIDATED INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 255.7	$ 374.9	$ 900.7	$ 1,145.4
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	208.4	298.6	719.5	917.2
Depreciation and amortization	12.9	12.3	39.1	36.3
Selling, general, administrative, research and development	21.3	23.3	67.9	75.7
Restructuring costs	0.5		12.4
Other operating charges (income), net	0.3		(0.8)	0.1
Total costs and expenses	243.4	334.2	838.1	1,029.3
Operating income	12.3	40.7	62.6	116.1
Other income (expense):
Interest expense	(12.1)	(5.8)	(28.7)	(17.3)
Other expense, net – Note 10	(0.5)	(0.8)	(0.8)	(0.4)
(Loss) income before income taxes	(0.3)	34.1	33.1	98.4
Income tax benefit (provision)	0.7	(8.7)	(10.2)	(25.8)
Net income	$ 0.4	$ 25.4	$ 22.9	$ 72.6
Net income per common share:
Basic	$ 0.02	$ 1.59	$ 1.45	$ 4.52
Diluted	$ 0.02	$ 1.57	$ 1.44	$ 4.47
Weighted-average number of common shares outstanding (in thousands):
Basic	15,794	15,956	15,804	16,042
Diluted	15,865	16,125	15,904	16,235