Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total sales	$ 497.7	$ 471.8
Operating income	83.9	82.6
Depreciation and amortization	22.2	18.3
Stock-based compensation	10.5	12.0
Accrual basis additions to capital expenditures	73.3	66.5
Corporate & Other and Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(18.1)	(20.5)
Operating income	(19.2)	(21.3)
Depreciation and amortization		0.1
Stock-based compensation	6.8	7.9
Composite Materials
Segment Reporting Information [Line Items]
Total sales	395.8	367.4
Composite Materials | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(18.1)	(20.4)
Composite Materials | Operating Segments
Segment Reporting Information [Line Items]
Total sales	413.9	387.8
Operating income	90.8	89.2
Depreciation and amortization	20.4	16.7
Stock-based compensation	3.1	3.6
Accrual basis additions to capital expenditures	70.0	62.1
Engineered Products
Segment Reporting Information [Line Items]
Total sales	101.9	104.4
Engineered Products | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales		(0.1)
Engineered Products | Operating Segments
Segment Reporting Information [Line Items]
Total sales	101.9	104.5
Operating income	12.3	14.7
Depreciation and amortization	1.8	1.5
Stock-based compensation	0.6	0.5
Accrual basis additions to capital expenditures	$ 3.3	$ 4.4