Restructuring and Other Related Charges - Accrual Balance and Utilization by Type of Restructuring Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning balance	$ 32.6	$ 4.2
Costs Incurred	26.8	50.4	$ 4.5
Paid/ Settled	(44.0)	(22.0)
Ending balance	15.4	32.6	4.2
Employee severance related
Restructuring Reserve [Roll Forward]
Beginning balance	32.4	3.8
Costs Incurred	21.1	46.9	3.0
Paid/ Settled	(38.7)	(18.3)
Ending balance	14.8	32.4	3.8
Facility exit and other related
Restructuring Reserve [Roll Forward]
Beginning balance	0.2	0.4
Costs Incurred	5.7	3.5
Paid/ Settled	(5.3)	(3.7)
Ending balance	$ 0.6	$ 0.2	$ 0.4