Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Total sales	$ 393.0	$ 320.3	$ 783.6	$ 630.6
Other operating (income) expense	(19.1)	3.1	(18.1)	15.2
Operating income	63.8	16.2	93.9	6.0
Depreciation and amortization	31.7	34.2	63.9	68.7
Stock-based compensation	2.4	4.3	12.8	13.3
Accrual basis additions to capital expenditures	17.2	3.8	28.3	7.8
Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(19.5)	(15.4)	(36.3)	(29.2)
Corporate & Other and Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(19.5)	(15.4)	(36.3)	(29.2)
Other operating (income) expense	19.4	(0.1)	19.4	(0.2)
Operating income	7.5	(14.2)	(15.6)	(36.5)
Depreciation and amortization	0.1	0.1	0.1	0.1
Stock-based compensation	1.2	3.4	8.3	11.6
Accrual basis additions to capital expenditures	0.0	0.0	0.0	0.0
Composite Materials
Segment Reporting Information [Line Items]
Total sales	318.1	240.9	631.9	478.1
Composite Materials | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	18.5	14.6	35.0	27.8
Composite Materials | Operating Segments
Segment Reporting Information [Line Items]
Total sales	336.6	255.5	666.9	505.9
Other operating (income) expense	(0.3)	(2.8)	(1.2)	(15.5)
Operating income	47.2	24.5	89.8	31.9
Depreciation and amortization	28.1	30.5	56.7	61.3
Stock-based compensation	0.9	0.8	3.5	1.4
Accrual basis additions to capital expenditures	14.5	3.4	24.6	7.0
Engineered Products
Segment Reporting Information [Line Items]
Total sales	74.9	79.4	151.7	152.5
Engineered Products | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	1.0	0.8	1.3	1.4
Engineered Products | Operating Segments
Segment Reporting Information [Line Items]
Total sales	75.9	80.2	153.0	153.9
Other operating (income) expense	0.0	(0.2)	(0.1)	(0.5)
Operating income	9.1	5.9	(19.7)	10.6
Depreciation and amortization	3.5	3.6	7.1	7.3
Stock-based compensation	0.3	0.1	1.0	0.3
Accrual basis additions to capital expenditures	$ 2.7	$ 0.4	$ 3.7	$ 0.8