Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Cash equivalents, maximum maturity period (in days)	90
Depreciation	$ 27.1	$ 25.5	$ 25.0
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets, minimum, years	20
Estimated useful lives of the assets, maximum, years	40
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of the assets, minimum, years	3
Estimated useful lives of the assets, maximum, years	10