Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Noncontrolling interests
Balance at beginning of period	$ 6.6	$ 5.1	$ 5.8	$ 4.1
Net income	1.1	0.8	2.7	2.5
Foreign currency translation adjustments			(0.3)	(1.1)
Other		(0.3)	(0.5)	0.1
Balance at end of period	$ 7.7	$ 5.6	$ 7.7	$ 5.6