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Goodwill and Identifiable Intangible Assets - Additional Information (Detail)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
asset_group
Goodwill and Identifiable Intangible Assets [Line Items]    
Goodwill [1] $ 2,063.3 $ 1,912.0
Goodwill translation and purchase accounting adjustments 151.3  
Other intangible assets, net of accumulated amortization 1,333.8 1,162.4
Carrying value of tradenames 724.0 709.9
Tradenames [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Impairment of intangible assets, trade names 39.9  
Doors & Security [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Goodwill [1] 386.7 240.5
Increase in gross identifiable intangible assets 196.4  
Cabinets [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Goodwill [1] 925.9 $ 926.3
Impairment of intangible assets, trade names 27.1  
Number of tradenames, with the fair value exceeded their carrying value | asset_group   2
Carrying value of tradenames $ 189.9  
Minimum [Member] | Tradenames and Customer Relationship [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Amortizable identifiable intangible assets, estimated useful life 2 years  
Maximum [Member] | Cabinets [Member] | Tradenames [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Percentage of fair value of reporting unit in excess of carrying amount   10.00%
Maximum [Member] | Tradenames and Customer Relationship [Member]    
Goodwill and Identifiable Intangible Assets [Line Items]    
Amortizable identifiable intangible assets, estimated useful life 20 years  
[1] Net of accumulated impairment losses of $399.5 million in the Doors & Security segment.