Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Total sales	$ 478.8	$ 497.7
Operating income	78.6	83.9
Depreciation and amortization	24.4	22.2
Stock-based compensation	10.9	10.5
Accrual basis additions to capital expenditures	92.9	73.3
Corporate & Other and Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(17.1)	(18.1)
Operating income	(16.3)	(19.2)
Depreciation and amortization	0.1
Stock-based compensation	6.8	6.8
Composite Materials
Segment Reporting Information [Line Items]
Total sales	387.5	395.8
Composite Materials | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	17.1	18.1
Composite Materials | Operating Segments
Segment Reporting Information [Line Items]
Total sales	404.6	413.9
Operating income	81.9	90.8
Depreciation and amortization	22.5	20.4
Stock-based compensation	3.4	3.1
Accrual basis additions to capital expenditures	86.6	70.0
Engineered Products
Segment Reporting Information [Line Items]
Total sales	91.3	101.9
Engineered Products | Operating Segments
Segment Reporting Information [Line Items]
Total sales	91.3	101.9
Operating income	13.0	12.3
Depreciation and amortization	1.8	1.8
Stock-based compensation	0.7	0.6
Accrual basis additions to capital expenditures	$ 6.3	$ 3.3