CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 161.4	$ 253.4	$ 395.0	$ 493.1
Cost of products sold	140.0	202.7	319.6	398.7
Gross profit	21.4	50.7	75.4	94.4
Selling, general and administrative expenses	20.8	26.9	47.4	52.2
Asset restructuring and impairment costs (Note 10)	55.3	2.0	55.3	2.0
Other restructuring and non-routine costs	1.3	1.5	2.7	1.5
Loss on debt extinguishment (Note 5)	1.9	0.0	1.9	0.0
COVID-19 costs	0.4	0.0	1.5	0.0
Acquisition and due diligence costs	0.1	0.0	1.1	0.0
Other expense - net	0.1	0.5	0.4	1.5
Operating income (loss)	(58.5)	19.8	(34.9)	37.2
Interest expense - net	3.0	3.0	5.9	6.2
Income (loss) from continuing operations before income taxes	(61.5)	16.8	(40.8)	31.0
Provision (benefit) for income taxes	(11.4)	3.2	(7.1)	5.6
Net income (loss)	$ (50.1)	$ 13.6	$ (33.7)	$ 25.4
Earnings (Loss) Per Common Share
Basic (in usd per share)	$ (2.98)	$ 0.80	$ (2.01)	$ 1.50
Diluted (in usd per share)	$ (2.98)	$ 0.80	$ (2.01)	$ 1.49
Weighted Average Common Shares Outstanding (in thousands)
Basic (in shares)	16,797	16,863	16,812	16,861
Diluted (in shares)	16,797	16,910	16,812	16,914
Cash dividends declared per share of common stock (in usd per share)	$ 0.47	$ 0.45	$ 0.94	$ 0.90