Income Taxes (Details3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Abstract
Income Loss From Continuing Operations Before Income Taxes Domestic	$ 280.5	$ 87.1	$ 57.9
Income Loss From Continuing Operations Before Income Taxes Foreign	58.9	38.6	7.0
Income before income tax provision (benefit)	$ 339.4	$ 125.7	$ 64.9