Segment Information - Schedule of Goodwill and Intangible Assets by Segment (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Goodwill and intangible assets	$ 59.2	$ 59.8
Goodwill And Intangible Asset Impairment	0.0
Composite Materials
Segment Reporting Information [Line Items]
Goodwill and intangible assets	43.2	43.7
Engineered Products
Segment Reporting Information [Line Items]
Goodwill and intangible assets	$ 16.0	$ 16.1