Restructuring Activities - Schedule of Approved Restructuring Spending (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total Restructuring Program Range
Other expenses associated with the Program	$ 7.2	$ 12.8	$ 15.0	$ 50.8
Total charges	8.2	19.7	26.7	94.4
Capital expenditures	0.2	$ 0.2	0.4	$ 2.5
Program
Total Restructuring Program Range
Other expenses associated with the Program	7.2		15.0
Less Cumulative Spend to Date
Costs of reduction in headcount as a result of reorganization	(335.0)		(335.0)
Other expenses associated with the Program	(213.0)		(213.0)
Total expense	(548.0)		(548.0)
Capital expenditures	(239.0)		(239.0)
Total estimated cash cost	(787.0)		(787.0)
Program | Minimum
Total Restructuring Program Range
Costs of reduction in headcount as a result of reorganization			355.0
Other expenses associated with the Program			230.0
Total charges			585.0
Capital expenditures			255.0
Total estimated net cash cost	840.0		840.0
Restructuring and Related Cost, Expected Cost [Abstract]
Costs of reduction in headcount as a result of reorganization	20.0		20.0
Other expenses associated with the Program	17.0		17.0
Total expense	37.0		37.0
Capital expenditures	16.0		16.0
Total estimated cash cost	53.0		53.0
Program | Maximum
Total Restructuring Program Range
Costs of reduction in headcount as a result of reorganization			370.0
Other expenses associated with the Program			245.0
Total charges			615.0
Capital expenditures			270.0
Total estimated net cash cost	885.0		885.0
Restructuring and Related Cost, Expected Cost [Abstract]
Costs of reduction in headcount as a result of reorganization	35.0		35.0
Other expenses associated with the Program	32.0		32.0
Total expense	67.0		67.0
Capital expenditures	31.0		31.0
Total estimated cash cost	$ 98.0		$ 98.0