Revenue - Schedule of Activity Related to Contract Assets (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020
Change in Contract with Customer Asset [Line Items]
Beginning Balance	$ 52.7	$ 52.7
Net revenue billed	3.2	(1.2)
Ending Balance	55.9	54.7
Composite Materials
Change in Contract with Customer Asset [Line Items]
Beginning Balance	12.8	12.8
Net revenue billed	(1.4)	0.5
Ending Balance	11.4	11.9
Engineered Products
Change in Contract with Customer Asset [Line Items]
Beginning Balance	39.9	39.9
Net revenue billed	4.6	(1.7)
Ending Balance	$ 44.5	$ 42.8