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Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 1,106.5 $ 950.8
Recognition of defined benefit plan actuarial losses (0.9)  
Operating income $ 95.5 67.3
Net Sales, Percentage Change vs. Prior Year 16.40%  
Operating Income(Loss), Percentage Change vs. Prior Year 41.90%  
Operating Segments [Member] | Cabinets [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 550.0 411.1
Operating income $ 35.7 13.0
Net Sales, Percentage Change vs. Prior Year 33.80%  
Operating Income(Loss), Percentage Change vs. Prior Year 174.60%  
Operating Segments [Member] | Plumbing [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 338.6 333.6
Operating income $ 71.5 63.8
Net Sales, Percentage Change vs. Prior Year 1.50%  
Operating Income(Loss), Percentage Change vs. Prior Year 12.10%  
Operating Segments [Member] | Doors [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 94.3 83.2
Operating income $ 4.2 (1.2)
Net Sales, Percentage Change vs. Prior Year 13.30%  
Operating Segments [Member] | Security [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 123.6 122.9
Operating income $ 5.6 8.0
Net Sales, Percentage Change vs. Prior Year 0.60%  
Operating Income(Loss), Percentage Change vs. Prior Year (30.00%)  
Corporate [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
General and administrative expense $ (21.4) (17.9)
Defined benefit plan costs 0.8 1.6
Recognition of defined benefit plan actuarial losses (0.9)  
Operating income $ (21.5) $ (16.3)
Operating Income(Loss), Percentage Change vs. Prior Year (31.90%)  
Total Corporate expenses, Percentage Change vs. Prior Year (31.90%)