Other Charges, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Charges, Net
Information technology transformation costs	$ 2.6	$ 1.1	$ 6.2	$ 2.4
Restructuring charges	3.0	2.8	5.3	7.0
Pension settlement charge			10.2
Professional fees incurred in connection with internal investigation	0.4	0.3	0.4	3.1
Acquisition-related charges (benefits)	0.4	1.2	(2.5)	2.1
Long-lived asset impairments	2.5	6.9	4.3	6.9
Other charges, net	$ 8.9	$ 12.3	$ 23.9	$ 21.5