Restructuring Activities - Schedule of Approved Restructuring Spending (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total Restructuring Program Range
Other expenses associated with the Program	$ 3.8	$ 21.3	$ 7.8	$ 38.0
Total charges	13.9	50.6	18.5	74.7
Capital expenditures	0.0	$ 1.8	0.2	$ 2.3
Program
Total Restructuring Program Range
Other expenses associated with the Program	3.8		7.8
Less Cumulative Spend to Date
Costs of reduction in headcount as a result of reorganization	(336.0)		(336.0)
Other expenses associated with the Program	(206.0)		(206.0)
Total expense	(542.0)		(542.0)
Capital expenditures	(239.0)		(239.0)
Total estimated cash cost	(781.0)		(781.0)
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	19.0		19.0
Other expenses associated with the Program	24.0		24.0
Total expense	43.0		43.0
Capital expenditures	16.0		16.0
Total estimated cash cost	59.0		59.0
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	34.0		34.0
Other expenses associated with the Program	39.0		39.0
Total expense	73.0		73.0
Capital expenditures	31.0		31.0
Total estimated cash cost	$ 104.0		$ 104.0