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Restructuring and Relocation Activities - Schedule of Program Metrics (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
Employee
Dec. 31, 2015
USD ($)
Dec. 31, 2014
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 28.0 $ 42.9 $ 35.8
Total expense 40.9 121.2 101.5
Capital expenditures 123.5 $ 52.0 $ 28.0
Total Cumulative Expense 331.0    
Cumulative capital expenditures 214.0    
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 $ 105.0