STATEMENTS OF CONSOLIDATED (LOSS) INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 750.6	$ 255.7	$ 1,815.6	$ 900.7
Costs and expenses:
Cost of products sold, excluding depreciation and amortization and other items	677.8	208.4	1,613.6	719.5
Depreciation and amortization	24.9	12.9	64.2	39.1
Selling, general, administrative, research and development	28.1	21.3	90.8	67.9
Restructuring costs (benefit)		0.5	(0.8)	12.4
Other operating charges (income), net		0.3		(0.8)
Total costs and expenses	730.8	243.4	1,767.8	838.1
Operating income	19.8	12.3	47.8	62.6
Other expense:
Interest expense	(12.5)	(12.1)	(37.2)	(28.7)
Other expense, net – Note 11	(1.2)	(0.5)	(38.2)	(0.8)
Income (loss) before income taxes	6.1	(0.3)	(27.6)	33.1
Income tax (provision) benefit	(8.4)	0.7	7.4	(10.2)
Net (loss) income	$ (2.3)	$ 0.4	$ (20.2)	$ 22.9
Net (loss) income per common share:
Basic	$ (0.14)	$ 0.02	$ (1.28)	$ 1.45
Diluted	$ (0.14)	$ 0.02	$ (1.28)	$ 1.44
Weighted-average number of common shares outstanding (in thousands):
Basic	15,852	15,794	15,831	15,804
Diluted	15,852	15,865	15,831	15,904