Restructuring Activities - Schedule of Approved Restructuring Spending (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2018
Total Restructuring Program Range
Other expenses associated with the Program	$ 5.4	$ 7.2	$ 15.5	$ 15.0
Total charges	7.8	8.2	20.0	26.7
Capital expenditures	1.7	$ 0.2	5.0	$ 0.4
Program
Total Restructuring Program Range
Other expenses associated with the Program			15.5
Less Cumulative Spend to Date
Costs of reduction in headcount as a result of reorganization	(65.0)		(65.0)
Other expenses associated with the Program	(98.0)		(98.0)
Total expense	(163.0)		(163.0)
Capital expenditures	(7.0)		(7.0)
Total estimated cash cost	(170.0)		(170.0)
Program | Minimum
Total Restructuring Program Range
Costs of reduction in headcount as a result of reorganization			65.0
Other expenses associated with the Program			105.0
Total charges			170.0
Capital expenditures			5.0
Restructuring expected spend	175.0		175.0		$ 190.0
Restructuring and Related Cost, Expected Cost [Abstract]
Costs of reduction in headcount as a result of reorganization	0.0		0.0
Other expenses associated with the Program	7.0		7.0
Total expense	7.0		7.0
Capital expenditures	0.0		0.0
Total estimated cash cost	7.0		7.0
Program | Maximum
Total Restructuring Program Range
Costs of reduction in headcount as a result of reorganization			70.0
Other expenses associated with the Program			120.0
Total charges			190.0
Capital expenditures			10.0
Restructuring expected spend	200.0		200.0		$ 220.0
Restructuring and Related Cost, Expected Cost [Abstract]
Costs of reduction in headcount as a result of reorganization	5.0		5.0
Other expenses associated with the Program	22.0		22.0
Total expense	27.0		27.0
Capital expenditures	3.0		3.0
Total estimated cash cost	$ 30.0		$ 30.0