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Goodwill and Identifiable Intangible Assets - Change in Net Carrying Amount of Goodwill by Segment (Detail)
$ in Millions
6 Months Ended
Jun. 30, 2019
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 2,080.3 [1]
Translation adjustments 3.9
Acquisition-related adjustments 1.5
Ending Balance 2,085.7 [1]
Cabinets [Member]  
Goodwill [Line Items]  
Beginning Balance 924.0 [1]
Translation adjustments 1.5
Ending Balance 925.5 [1]
Plumbing [Member]  
Goodwill [Line Items]  
Beginning Balance 743.7 [1]
Translation adjustments 1.8
Ending Balance 745.5 [1]
Doors & Security [Member]  
Goodwill [Line Items]  
Beginning Balance 412.6 [1]
Translation adjustments 0.6
Acquisition-related adjustments 1.5
Ending Balance $ 414.7 [1]
[1] Net of accumulated impairment losses of $399.5 million in the Doors & Security segment.