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Cost Reduction Actions - Additional Information (Detail)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
Employee
Mar. 31, 2016
USD ($)
Employee
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Restructuring Cost and Reserve [Line Items]        
Estimated pretax restructuring charges       $ 300.0
Restructuring charges $ 25.4 $ 26.9 $ 82.1 $ 118.5
Severance costs 12.5 22.1    
Other expenses related to the cost reduction effort 12.9 4.8    
Cost of Revenue | Services        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 8.5 11.5    
Selling, general and administrative expenses        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 11.3 13.3    
Research and development expenses        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0.3 2.1    
Other income (expense), net        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 5.3      
Idle leased facilities        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 2.9      
Other expenses related to the cost reduction effort 2.9      
Contract amendment and termination        
Restructuring Cost and Reserve [Line Items]        
Other expenses related to the cost reduction effort 3.3      
Professional fees and other        
Restructuring Cost and Reserve [Line Items]        
Other expenses related to the cost reduction effort 1.4      
Foreign currency translation adjustment        
Restructuring Cost and Reserve [Line Items]        
Other expenses related to the cost reduction effort 5.3      
Foreign currency translation adjustment | Other income (expense), net        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 5.3      
United States        
Restructuring Cost and Reserve [Line Items]        
Severance costs $ 0.5 $ 4.2    
Number of employees | Employee 45 175    
United States | Changes in estimates        
Restructuring Cost and Reserve [Line Items]        
Severance costs $ (0.1)      
Non-US        
Restructuring Cost and Reserve [Line Items]        
Severance costs $ 4.2 $ 17.9    
Number of employees | Employee 75 337    
Non-US | Changes in estimates        
Restructuring Cost and Reserve [Line Items]        
Severance costs $ (0.3)      
Non-US | Additional benefits provided in 2017        
Restructuring Cost and Reserve [Line Items]        
Severance costs $ 8.2