Restructuring Activities - Schedule of Program Metrics (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) employee	Sep. 30, 2017 USD ($)	Mar. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Other expenses associated with the Program	$ 0.7	$ 2.9	$ 2.5	$ 12.7
Total charges	7.5	7.7	25.8	24.2
Capital expenditures	0.1	$ 3.4	$ 0.6	$ 17.3
Program
Restructuring Cost and Reserve [Line Items]
Approximate positions eliminated by the program | employee			1,950
Costs of reduction in headcount as a result of reorganization			$ 259.0
Other expenses associated with the Program			126.0
Total estimated net cash cost					$ 120.0
Total Cumulative Expense	385.0		385.0
Cumulative capital expenditures	236.0		236.0
Program | Minimum
Restructuring Cost and Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization			275.0
Other expenses associated with the Program			135.0
Total charges			410.0
Capital expenditures			240.0
Proceeds, foreign exchange and other cash items			(70.0)
Total estimated net cash cost	580.0		580.0
Program | Maximum
Restructuring Cost and Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization			280.0
Other expenses associated with the Program			140.0
Total charges			420.0
Capital expenditures			245.0
Proceeds, foreign exchange and other cash items			(75.0)
Total estimated net cash cost	$ 590.0		$ 590.0