Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Segment information
Goodwill and intangible assets	$ 57.4	$ 57.8
Goodwill and intangible assets impairments	0
Composite Materials
Segment information
Goodwill and intangible assets	41.4	41.7
Engineered Products
Segment information
Goodwill and intangible assets	$ 16.0	$ 16.1

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