Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ 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	$ 328.3	$ 504.7	$ 657.5	$ 922.7
Cost of sales	279.9	409.5	545.9	747.3
Gross profit	48.4	95.2	111.6	175.4
Operating costs and expenses:
Engineering, selling and administrative expenses	49.7	50.5	105.6	109.9
Amortization of intangible assets	0.1	0.1	0.2	0.2
Restructuring expense	0.2	2.7	1.7	7.2
Total operating costs and expenses	50.0	53.3	107.5	117.3
Operating income (loss)	(1.6)	41.9	4.1	58.1
Other income (expense):
Interest expense	(7.2)	(7.5)	(14.4)	(18.4)
Amortization of deferred financing fees	(0.3)	(0.4)	(0.7)	(0.8)
Loss on debt extinguishment				(25.0)
Other income (expense) - net	(2.9)	15.9	(6.9)	12.6
Total other income (expense)	(10.4)	8.0	(22.0)	(31.6)
Income (loss) before income taxes	(12.0)	49.9	(17.9)	26.5
Provision for income taxes	0.7	3.9	2.6	7.2
Net income (loss)	$ (12.7)	$ 46.0	$ (20.5)	$ 19.3
Per Share Data
Basic income (loss) per common share	$ (0.37)	$ 1.29	$ (0.59)	$ 0.54
Diluted income (loss) per common share	$ (0.37)	$ 1.29	$ (0.59)	$ 0.54
Weighted average shares outstanding - basic	34,519,889	35,595,718	34,827,582	35,619,145
Weighted average shares outstanding - diluted	34,519,889	35,725,908	34,827,582	35,799,089