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Acquisitions - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
May. 31, 2015
Mar. 31, 2015
Jul. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Business Acquisition [Line Items]                
Operating income       $ 160.3 $ 129.5 $ 355.8 $ 324.3  
Net sales       1,238.8 $ 1,057.7 3,354.7 $ 2,974.0  
Payment to acquire business   $ 6.0            
Norcraft Companies, Inc [Member]                
Business Acquisition [Line Items]                
Business acquisition purchase price $ 648.6              
Operating income       12.0   15.0    
Acquisition related transaction costs       0.2   15.1    
Net sales       105.0   151.0    
Identifiable intangible assets       210.0   210.0    
Indefinite intangible assets, tradename $ 335.0     125.0   $ 125.0    
Norcraft Companies, Inc [Member] | Customer Relationships                
Business Acquisition [Line Items]                
Amortizable identifiable intangible assets, estimated useful life           20 years    
Anaheim Manufacturing Company [Member]                
Business Acquisition [Line Items]                
Business acquisition purchase price               $ 28.9
Net sales       8.0   $ 23.0    
SentrySafe [Member]                
Business Acquisition [Line Items]                
Business acquisition purchase price     $ 116.7          
Net sales       $ 33.0   $ 101.0