Noncontrolling Interests (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Noncontrolling interests
Balance at beginning of period	$ 3.3	$ 1.6	$ 2.7	$ 1.6
Net income	0.3	0.5	1.2	0.7
Foreign currency translation adjustments		0.1	0.1
Cash payments to noncontrolling interests			(0.4)	(0.1)
Balance at end of period	$ 3.6	$ 2.2	$ 3.6	$ 2.2