Restructuring Initiatives - Transformation Plan (Details) - Transformation Plan & Other - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 9.9	$ 38.0
Charges	0.0	(0.2)
Adjustments	(4.5)	(0.2)
Cash payments	(1.7)	(27.4)
Non-cash write-offs	0.0	(0.3)
Foreign exchange	(0.2)	0.0
Ending Balance	3.5	9.9
Employee-Related Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	8.4	34.4
Charges	0.0	(0.7)
Adjustments	(4.5)	(0.2)
Cash payments	(0.4)	(25.0)
Non-cash write-offs	0.0	0.0
Foreign exchange	(0.1)	(0.1)
Ending Balance	3.4	8.4
Inventory write-off
Restructuring Reserve [Roll Forward]
Beginning Balance	0.0	0.0
Charges	0.0	0.3
Adjustments	0.0	0.0
Cash payments	0.0	0.0
Non-cash write-offs	0.0	(0.3)
Foreign exchange	0.0	0.0
Ending Balance	0.0	0.0
Contract termination and other net costs
Restructuring Reserve [Roll Forward]
Beginning Balance	1.5	3.6
Charges	0.0	0.2
Adjustments	0.0	0.0
Cash payments	(1.3)	(2.4)
Non-cash write-offs	0.0	0.0
Foreign exchange	(0.1)	0.1
Ending Balance	$ 0.1	$ 1.5