Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income from continuing operations before income taxes
Domestic	$ 91.3	$ 157.2	$ 99.7
Foreign	39.3	19.4	1.2
Income from continuing operations before income taxes	$ 130.6	$ 176.6	$ 100.9