Restructuring Charges - Activity and Reserve Balance for Restructuring Charges by Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2021	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 22.5	$ 6.2
Restructuring charges	1.3	27.4
Currency translation and other adjustments	(0.6)	0.0
Cash payments	(3.5)	(11.1)
Restructuring reserve, ending balance	19.7
Corporate
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.4	0.0
Restructuring charges	0.1	0.8
Currency translation and other adjustments	0.0	0.0
Cash payments	(0.1)	(0.4)
Restructuring reserve, ending balance	0.4
Americas
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2.8	0.3
Restructuring charges	0.2	4.7
Currency translation and other adjustments	0.0	(0.1)
Cash payments	(0.3)	(2.1)
Restructuring reserve, ending balance	2.7
International
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	19.3	5.9
Restructuring charges	1.0	21.9
Currency translation and other adjustments	(0.6)	0.1
Cash payments	(3.1)	$ (8.6)
Restructuring reserve, ending balance	$ 16.6