Other Charges, Net - Components (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Charges, Net
Acquisition-related expenses (income), net						$ 9.0	$ (7.2)	$ 2.9
Professional fees incurred in connection with internal investigation							0.4	3.2
Pension settlement charge							10.2
Information technology transformation costs						6.2	8.9	4.0
Restructuring charges						9.8	8.1	11.1
Long-lived asset impairments	$ 0.1	$ 0.7	$ 0.3	$ 2.5	$ 1.8	0.8	4.6	11.5
Other charges, net						$ 25.8	$ 25.0	$ 32.7