Restructuring and Relocation Activities - Schedule of Program Metrics (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) Employee	Mar. 31, 2016 USD ($)
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	$ 226.0
Other expenses associated with the Program	3.9	$ 3.9
Total expense	4.1	6.1
Capital expenditures	9.9	$ 19.1
Total Cumulative Expense	335.0
Cumulative Capital expenditures	224.0
Minimum [Member]
Restructuring Cost And Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization	235.0
Other expenses associated with the Program	155.0
Total expense	390.0
Capital expenditures	250.0
Proceeds, foreign exchange and other cash items	(70.0)
Total estimated net cash cost	570.0
Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Costs of reduction in headcount as a result of reorganization	245.0
Other expenses associated with the Program	160.0
Total expense	405.0
Capital expenditures	255.0
Proceeds, foreign exchange and other cash items	(75.0)
Total estimated net cash cost	585.0
Other Restructuring
Restructuring Cost And Reserve [Line Items]
Other expenses associated with the Program	$ 109.0