Restructuring and Other Charges - Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 4.0	$ 8.1	$ 2.8
Restructuring Charges before Adjustments	17.9	7.3	12.3
Cash payments	(17.5)	(9.8)	(7.0)
Adjustments to estimates on restructuring reserves	(0.3)	(1.6)
Restructuring reserve, ending balance	4.1	4.0	8.1
Americas
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.9	1.6	0.0
Restructuring Charges before Adjustments	13.0	1.8	3.3
Cash payments	(13.2)	(2.0)	(1.9)
Adjustments to estimates on restructuring reserves	(0.2)	(0.5)
Restructuring reserve, ending balance	0.5	0.9	1.6
International
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2.8	5.4	2.6
Restructuring Charges before Adjustments	4.9	5.3	7.4
Cash payments	(4.0)	(7.3)	(4.6)
Adjustments to estimates on restructuring reserves	(0.1)	(0.6)
Restructuring reserve, ending balance	3.6	2.8	5.4
Corporate
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.3	1.1	0.0
Restructuring Charges before Adjustments	0.0	0.2	1.6
Cash payments		(0.5)	(0.5)
Adjustments to estimates on restructuring reserves	0.0	(0.5)
Payments for Restructuring and Restructuring Reserve, Settled without Cash	0.3
Restructuring reserve, ending balance	$ 0.0	$ 0.3	$ 1.1