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Goodwill and Identifiable Intangible Assets - Additional Information (Detail)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
asset_group
Goodwill [Line Items]    
Goodwill [1] $ 1,916.7 $ 1,912.0
Other intangible assets, net of accumulated amortization 1,139.0 1,162.4
Decrease in gross identifiable intangible assets (8.6)  
Carrying value of tradenames 706.2 709.9
Victoria Plus Albert [Member]    
Goodwill [Line Items]    
Additional purchase price consideration paid 5.8  
Plumbing [Member]    
Goodwill [Line Items]    
Goodwill [1] 752.2 745.2
Goodwill increase due to foreign exchange adjustments 4.7  
Cabinets [Member]    
Goodwill [Line Items]    
Goodwill [1] $ 924.8 $ 926.3
Number of tradenames, with the fair value exceeded their carrying value | asset_group   2
Carrying value of tradenames   $ 217.8
Minimum [Member] | Tradenames and Customer Relationship [Member]    
Goodwill [Line Items]    
Amortizable identifiable intangible assets, estimated useful life 2 years  
Maximum [Member] | Cabinets [Member] | Tradenames [Member]    
Goodwill [Line Items]    
Percentage of fair value of reporting unit in excess of carrying amount   10.00%
Maximum [Member] | Tradenames and Customer Relationship [Member]    
Goodwill [Line Items]    
Amortizable identifiable intangible assets, estimated useful life 20 years  
[1] Net of accumulated impairment losses of $399.5 million in the Doors segment.