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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, 2015
USD ($)
Goodwill [Line Items]  
Beginning Balance [1] $ 1,467.8
Year-to-date translation adjustments (2.6)
Acquisition-related adjustments 439.5
Ending Balance [1] 1,904.7
Doors [Member]  
Goodwill [Line Items]  
Beginning Balance [1] $ 143.0
Year-to-date translation adjustments  
Acquisition-related adjustments  
Ending Balance [1] $ 143.0
Cabinets [Member]  
Goodwill [Line Items]  
Beginning Balance [1] 630.1
Year-to-date translation adjustments (1.7)
Acquisition-related adjustments 456.9
Ending Balance [1] 1,085.3
Plumbing [Member]  
Goodwill [Line Items]  
Beginning Balance [1] 595.6
Acquisition-related adjustments (17.0)
Ending Balance [1] 578.6
Security [Member]  
Goodwill [Line Items]  
Beginning Balance [1] 99.1
Year-to-date translation adjustments (0.9)
Acquisition-related adjustments (0.4)
Ending Balance [1] $ 97.8
[1] Net of accumulated impairment losses of $399.5 million in the Doors segment.