Segment Information - Schedule of Goodwill and Intangible Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Goodwill and intangible assets	$ 150.2	$ 148.7
Composite Materials
Segment Reporting Information [Line Items]
Goodwill and intangible assets	105.4	103.7
Engineered Products
Segment Reporting Information [Line Items]
Goodwill and intangible assets	$ 44.8	$ 45.0

Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

No definition available.

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