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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, 2018
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 1,912.0 [1]
Year-to-date translation adjustments (3.4)
Acquisition-related adjustments 8.1
Ending Balance 1,916.7 [1]
Cabinets [Member]  
Goodwill [Line Items]  
Beginning Balance 926.3 [1]
Year-to-date translation adjustments (1.5)
Ending Balance 924.8 [1]
Plumbing [Member]  
Goodwill [Line Items]  
Beginning Balance 745.2 [1]
Year-to-date translation adjustments (1.1)
Acquisition-related adjustments 8.1
Ending Balance 752.2 [1]
Doors [Member]  
Goodwill [Line Items]  
Beginning Balance 143.0 [1]
Ending Balance 143.0 [1]
Security [Member]  
Goodwill [Line Items]  
Beginning Balance 97.5 [1]
Year-to-date translation adjustments (0.8)
Ending Balance $ 96.7 [1]
[1] Net of accumulated impairment losses of $399.5 million in the Doors segment.