Restructuring Plans - Summary of Restructuring Charges and Accrual (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 9.5
Additional accruals	2.7	$ 8.2
Cash payments	(4.3)
Ending balance	7.9
Employee Termination Costs
Restructuring Reserve [Roll Forward]
Beginning balance	7.3
Additional accruals	2.3
Cash payments	(3.3)
Ending balance	6.3
Property Costs
Restructuring Reserve [Roll Forward]
Beginning balance	0.8
Additional accruals	0.4
Cash payments	(0.7)
Ending balance	0.5
Other
Restructuring Reserve [Roll Forward]
Beginning balance	1.4
Additional accruals	0.0
Cash payments	(0.3)
Ending balance	$ 1.1