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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, 2019
Dec. 31, 2018
Goodwill [Line Items]    
Beginning Balance [1] $ 2,080.3 $ 1,912.0
Translation adjustments 5.6 (9.6)
Acquisition-related adjustments 4.3 177.9
Ending Balance [1] 2,090.2 2,080.3
Cabinets [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 924.0 926.3
Translation adjustments 1.5 (2.3)
Ending Balance [1] 925.5 924.0
Plumbing [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 743.7 745.2
Translation adjustments 3.6 (5.9)
Acquisition-related adjustments   4.4
Ending Balance [1] 747.3 743.7
Doors & Security [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 412.6 240.5
Translation adjustments 0.5 (1.4)
Acquisition-related adjustments 4.3 173.5
Ending Balance [1] $ 417.4 $ 412.6
[1] Net of accumulated impairment losses of $399.5 million in the Doors & Security segment.