Revenue - Schedule of Activity Related to Contract Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Change in Contract with Customer Asset [Line Items]
Beginning Balance	$ 50.5	$ 38.1
Net revenue billed	2.2	12.4
Ending Balance	52.7	50.5
Composite Materials
Change in Contract with Customer Asset [Line Items]
Beginning Balance	12.9	15.1
Net revenue billed	(0.1)	(2.2)
Ending Balance	12.8	12.9
Engineered Products
Change in Contract with Customer Asset [Line Items]
Beginning Balance	37.6	23.0
Net revenue billed	2.3	14.6
Ending Balance	$ 39.9	$ 37.6