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Goodwill and Identifiable Intangible Assets - Change in Net Carrying Amount of Goodwill by Segment (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 2,090.2
Translation adjustments (10.9)
Ending Balance 2,079.3
Cabinets [Member]  
Goodwill [Line Items]  
Beginning Balance 925.5
Translation adjustments (2.5)
Ending Balance 923.0
Plumbing [Member]  
Goodwill [Line Items]  
Beginning Balance 747.3
Translation adjustments (7.4)
Ending Balance 739.9
Doors & Security [Member]  
Goodwill [Line Items]  
Beginning Balance 417.4
Translation adjustments (1.0)
Ending Balance $ 416.4