Interest and Other Income (Expense), Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Interest and Other Income (Expense), Net
Interest income	$ 0.2	$ 0.2
Interest expense	(3.5)	(1.5)
Exchange losses on foreign currency transactions	(3.0)	(2.9)
Other	(1.2)	(0.8)
Interest and other income (expense), net	$ (7.5)	$ (5.0)