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Goodwill and Identifiable Intangible Assets - Change in Net Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Line Items]    
Beginning Balance [1] $ 1,912.0 $ 1,833.8
Translation adjustments (9.6) 6.5
Acquisition-related adjustments 177.9 71.7
Ending Balance [1] 2,080.3 1,912.0
Cabinets [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 926.3 924.3
Translation adjustments (2.3) 2.0
Ending Balance [1] 924.0 926.3
Plumbing [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 745.2 670.2
Translation adjustments (5.9) 3.3
Acquisition-related adjustments 4.4 71.7
Ending Balance [1] 743.7 745.2
Doors & Security [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 240.5 239.3
Translation adjustments (1.4) 1.2
Acquisition-related adjustments 173.5  
Ending Balance [1] $ 412.6 $ 240.5
[1] Net of accumulated impairment losses of $399.5 million in the Doors & Security segment.