Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Noncontrolling interests
Balance at beginning of period	$ 7.0	$ 5.8	$ 6.8	$ 5.8
Net income	0.3	1.2	0.3	1.6
Foreign currency translation adjustments	(0.2)	0.1		(0.3)
Other		(0.5)		(0.5)
Balance at end of period	$ 7.1	$ 6.6	$ 7.1	$ 6.6