Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Noncontrolling interests
Balance at beginning of period	$ 5.8	$ 5.7	$ 5.8	$ 4.1
Net income	1.2	0.4	1.6	1.7
Foreign currency translation adjustment	0.1	(1.1)	(0.3)	(1.1)
Other	(0.5)	0.1	(0.5)	0.4
Balance at end of period	$ 6.6	$ 5.1	$ 6.6	$ 5.1