2020 Global Restructuring Plan Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring accruals - beginning balance	$ 7.5	$ 6.7
Restructuring costs	43.0	12.8	$ 5.2
Cash payments	(33.0)	(11.7)
Foreign exchange translation and other	1.6	(0.3)
Restructuring accrual - ending balance	19.1	7.5	$ 6.7
2020 Global Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring accruals - beginning balance	0.0
Restructuring costs	43.8
Cash payments	(27.9)
Foreign exchange translation and other	1.2
Restructuring accrual - ending balance	$ 17.1	$ 0.0