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Significant Accounting Policies - Additional Information (Detail) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 12 Months Ended
May 09, 2016
May 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jan. 31, 2016
Schedule Of Significant Accounting Policies [Line Items]            
Advertising expense     $ 20.8 $ 4.8 $ 4.4  
Cash equivalents     623.2 615.4    
Non-trade receivables     20.5 20.7    
Depreciation expense     69.9 62.3 56.8  
Capitalized internal-use software     $ 16.4 $ 17.1 21.2  
Treasury stock previously repurchased shares     43.9 43.1    
Interest rate swap contract            
Schedule Of Significant Accounting Policies [Line Items]            
Fixed-rate notes interest percentage           2.875%
Forward Starting Interest Rate Swaps | 3.000% senior unsecured notes due 2026            
Schedule Of Significant Accounting Policies [Line Items]            
Fixed-rate notes interest percentage 3.00% 3.00%        
Debt instrument, maturity year 2026 2026        
Software            
Schedule Of Significant Accounting Policies [Line Items]            
Amortization expense     $ 13.0 $ 11.3 $ 8.5  
Software | Minimum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life of other intangible assets     5 years      
Software | Maximum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life of other intangible assets     7 years      
Other Intangible Assets | Minimum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life of other intangible assets     5 years      
Other Intangible Assets | Maximum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life of other intangible assets     22 years      
Other Intangible Assets | Weighted Average            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life of other intangible assets     13 years      
Building and Building Improvements | Minimum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life     3 years      
Building and Building Improvements | Maximum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life     40 years      
Machinery and Equipment | Minimum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life     3 years      
Machinery and Equipment | Maximum            
Schedule Of Significant Accounting Policies [Line Items]            
Estimated useful life     20 years