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Acquisitions and Dispositions - Narrative (Detail)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 11, 2016
USD ($)
Business
Sep. 30, 2016
USD ($)
Business
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Business
Aug. 04, 2016
USD ($)
Apr. 29, 2015
Business Acquisition [Line Items]            
Acquisition-related expenses     $ 2.7 $ 0.5    
International | Disposition            
Business Acquisition [Line Items]            
Number of businesses disposed | Business 2 3        
Net proceeds of disposition of business $ 13.4 $ 0.3        
Gain (loss) on disposition of business     11.9      
International | Disposition | Venezuelan Operating Entity            
Business Acquisition [Line Items]            
Gain (loss) on disposition of business       (14.7)    
Joint venture, ownership percentage           50.10%
Net sales       16.3    
Gain (loss) before income taxes       (38.4)    
Precision Dialogue Holdings, LLC            
Business Acquisition [Line Items]            
Purchase price, net of cash acquired         $ 59.2  
Sales from acquiree operations     22.4      
Earning before income taxes     $ 1.8      
Tax deductible goodwill         $ 8.8  
Four Insignificant Acquisitions            
Business Acquisition [Line Items]            
Tax deductible goodwill       $ 9.8    
Number of insignificant acquisitions | Business       4