Quarterly Financial Data - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Quarterly Financial Information [Line Items]
Actuarial loss	$ (13.7)	$ (5.2)	$ (42.2)
Asset impairment charges	0	21.2	13.2
Cabinets
Quarterly Financial Information [Line Items]
Indefinite-lived intangible assets impairment charges per diluted share		$ 0.08
Tradenames
Quarterly Financial Information [Line Items]
Actuarial loss per diluted share				$ 0.04	$ 0.01	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.02
Pre Tax | Cabinets
Quarterly Financial Information [Line Items]
Asset impairment charges		21.2
Pre Tax | Tradenames
Quarterly Financial Information [Line Items]
Actuarial loss	(13.7)	(5.2)		(12.0)	(1.1)	(0.6)	(0.4)	(0.3)	(0.7)	(4.6)
After Tax | Cabinets
Quarterly Financial Information [Line Items]
Asset impairment charges		13.8
After Tax | Tradenames
Quarterly Financial Information [Line Items]
Actuarial loss				$ (7.6)	$ (0.7)	$ (0.4)	$ (0.4)	$ (0.2)	$ (0.4)	$ (3.1)