Revenue - Schedule of Activity Related to Contract Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Change in Contract with Customer Asset [Line Items]
Balance at December 31, 2018	$ 50.5
Net revenue billed	3.2
Balance at March 31, 2019	53.7
Composite Materials
Change in Contract with Customer Asset [Line Items]
Balance at December 31, 2018	12.9
Net revenue billed	(1.4)
Balance at March 31, 2019	11.5
Engineered Products
Change in Contract with Customer Asset [Line Items]
Balance at December 31, 2018	37.6
Net revenue billed	4.6
Balance at March 31, 2019	$ 42.2