Interest and Other Income (Expense), Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest and Other Income (Expense), Net
Interest income	$ 0.2	$ 0.2	$ 0.5	$ 0.6
Interest expense	(3.6)	(1.7)	(10.7)	(4.8)
Exchange gains (losses) on foreign currency transactions	(2.1)	3.0	(4.2)	(3.7)
Gain on disposal of business	2.2		2.2
Other	0.6	0.4	(0.8)	(0.9)
Interest and other income (expense), net	$ (2.7)	$ 1.9	$ (13.0)	$ (8.8)