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Acquisitions - Allocation of Consideration Transferred (Detail) - USD ($)
$ in Millions
6 Months Ended
Aug. 31, 2016
May 31, 2015
Dec. 31, 2016
Jun. 30, 2016
Business Acquisition [Line Items]        
Goodwill     $ 315.4 $ 195.3
Total cash consideration transferred     216.1  
Assurex [Member]        
Business Acquisition [Line Items]        
Current assets $ 18.2      
Intangible assets 295.6      
Equipment 1.8      
Goodwill 120.5   $ 120.5 $ 116.3
Current liabilities (18.6)      
Deferred tax liability (65.9)      
Total fair value purchase price 351.6      
Less: Contingent consideration (130.0)      
Less: Cash acquired (5.5)      
Total cash consideration transferred $ 216.1      
Sividon Diagnostics GmbH [Member]        
Business Acquisition [Line Items]        
Current assets   $ 2.7    
Intangible assets   45.4    
Equipment   0.3    
Goodwill   18.9    
Current liabilities   (15.4)    
Total fair value purchase price   51.9    
Less: Contingent consideration   (10.9)    
Less: Cash acquired   (2.0)    
Total cash consideration transferred   $ 39.0