Goodwill and Identifiable Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended						3 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 1,467.8	[1]	$ 1,433.8	[1]	$ 1,295.3	[1]	$ 1,295.3	[1]
Identifiable intangible assets, tradenames	656.5		628.9
Expected intangible amortization expense in 2015	14
Expected intangible amortization expense in 2016	13
Expected intangible amortization expense in 2017	12
Expected intangible amortization expense in 2018	11
Expected intangible amortization expense in 2019	10
Goodwill impairment charges	0		0
Indefinite-lived intangible assets impairment charges	0		21.2		13.2
Pre Tax
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets impairment charges							13.2
Pre Tax | Advanced Material Windows & Door Systems | Tradenames
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets impairment charges							7.3
Pre Tax | Kitchen & Bath Cabinetry | Tradenames
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets impairment charges							5.9
Minimum | Tradenames and Customer Relationship
Goodwill And Intangible Assets [Line Items]
Amortizable identifiable intangible assets, estimated useful life	5 years
Maximum | Tradenames and Customer Relationship
Goodwill And Intangible Assets [Line Items]
Amortizable identifiable intangible assets, estimated useful life	30 years
Anaheim Manufacturing Company and SentrySafe
Goodwill And Intangible Assets [Line Items]
Goodwill increase due to acquisition	34.0
SentrySafe
Goodwill And Intangible Assets [Line Items]
Increase in gross amortizable identifiable intangible assets acquired	$ 38.6

[1] Net of accumulated impairment losses of $399.5 million in the Doors segment.