Goodwill and Purchased Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Composite Materials	Dec. 31, 2012 Composite Materials	Dec. 31, 2013 Engineered Products	Dec. 31, 2012 Engineered Products	Dec. 31, 2011 Engineered Products
Changes in the carrying amount of gross goodwill and other purchased intangibles
Balance at the beginning of the period	$ 57.8	$ 57.4	$ 41.7	$ 41.3	$ 16.1	$ 16.1	$ 16.1
Additions	3.0		3.0
Amortization expense	(0.1)		(0.1)
Currency translation adjustments and other	0.4	0.4	0.4	0.4
Balance at the end of the period	61.1	57.8	45.0	41.7	16.1	16.1	16.1
Indefinite-lived intangible assets	3.6
Definitive-lived intangible asset	2.9
Goodwill	$ 54.6