Goodwill and Other Intangible Assets (Business Acquisition) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition [Line Items]
Cash purchase price of aquisition		$ 5.0
Goodwill		4.1
Liabilities related to contingent consideration		2.4
Deferred income tax liabilities	1.8	1.7
In-Process Research and Development [Member]
Business Acquisition [Line Items]
Intangible assets		5.0
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	6.4
Patents [Member]
Business Acquisition [Line Items]
Patents purchased	$ 3.0