Revenue - Schedule of Activity Related to Contract Assets (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Change In Contract With Customer Asset [Line Items]
Opening adjustment - January 1, 2018	$ 38.1
Net revenue billed	12.4
Balance at December 31, 2018	50.5
Composite Materials
Change In Contract With Customer Asset [Line Items]
Opening adjustment - January 1, 2018	15.1
Net revenue billed	(2.2)
Balance at December 31, 2018	12.9
Engineered Products
Change In Contract With Customer Asset [Line Items]
Opening adjustment - January 1, 2018	23.0
Net revenue billed	14.6
Balance at December 31, 2018	$ 37.6

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant