Income Taxes Components of Income before Income Tax, Domestic and Foreign (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of Income (Loss) before Income Taxes and Equity Income of Unconsolidated Entities
U.S.	$ 53.8	$ 29.3	$ 89.0
International	(10.5)	7.3	(9.8)
Income before Income Taxes and Equity Income of Unconsolidated Entities	$ 43.3	$ 36.6	$ 79.2