Restructuring Activities - Schedule of Program Metrics (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) employee	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Total charges	$ 10.8	$ 4.1
Capital expenditures	$ 0.2	$ 9.9
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	$ 246.0
Other expenses associated with the Program	125.0
Total estimated net cash cost			$ 120.0
Total Cumulative Expense	371.0
Cumulative capital expenditures	235.0
Program | Minimum
Restructuring Cost and Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization	260.0
Other expenses associated with the Program	130.0
Total charges	390.0
Capital expenditures	250.0
Proceeds, foreign exchange and other cash items	(70.0)
Total estimated net cash cost	570.0
Program | Maximum
Restructuring Cost and Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization	270.0
Other expenses associated with the Program	135.0
Total charges	405.0
Capital expenditures	255.0
Proceeds, foreign exchange and other cash items	(75.0)
Total estimated net cash cost	$ 585.0