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Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 1,254.6 $ 1,186.8
Operating Income (Loss) $ 119.4 111.0
Net Sales, Percentage Change vs. Prior Year 5.70%  
Operating Income (Loss), Percentage Change vs. Prior Year 7.60%  
Corporate [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Operating Income (Loss) [1] $ (21.3) (21.5)
General and administrative expense [1] (21.3) (21.5)
Total Corporate expenses [1] $ (21.3) (21.5)
Operating Income (Loss), Percentage Change vs. Prior Year [1] 0.90%  
Total Corporate expenses, Percentage Change vs. Prior Year [1] 0.90%  
Cabinets [Member] | Operating Segments [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 557.2 573.6
Operating Income (Loss) $ 24.1 47.0
Net Sales, Percentage Change vs. Prior Year (2.90%)  
Operating Income (Loss), Percentage Change vs. Prior Year (48.70%)  
Plumbing [Member] | Operating Segments [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 449.7 378.4
Operating Income (Loss) [1] $ 88.4 67.2
Net Sales, Percentage Change vs. Prior Year 18.80%  
Operating Income (Loss), Percentage Change vs. Prior Year [1] 31.50%  
Doors [Member] | Operating Segments [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 110.3 102.2
Operating Income (Loss) $ 13.1 8.2
Net Sales, Percentage Change vs. Prior Year 7.90%  
Operating Income (Loss), Percentage Change vs. Prior Year 59.80%  
Security [Member] | Operating Segments [Member]    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Net sales $ 137.4 132.6
Operating Income (Loss) $ 15.1 $ 10.1
Net Sales, Percentage Change vs. Prior Year 3.60%  
Operating Income (Loss), Percentage Change vs. Prior Year 49.50%  
[1] We revised our previously reported results for the three months ended March 31, 2017 for ASU 2017-07, Presentation of Net Periodic Pension and Postretirement Costs.