Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions		3 Months Ended										12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	[1]	Sep. 30, 2015	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales		$ 1,382.5	$ 1,348.6	$ 1,365.4	$ 1,186.8	$ 1,301.6	$ 1,279.0	$ 1,297.8	$ 1,106.5			$ 5,283.3	[2]	$ 4,984.9	[2]	$ 4,579.4	[2]
Operating income		163.0	201.8	212.4	114.9	166.4	183.1	187.7	95.5			692.1		632.7		496.1
Net sales		1,382.5	$ 1,348.6	$ 1,365.4	1,186.8	1,301.6	$ 1,279.0	$ 1,297.8	$ 1,106.5			5,283.3	[2]	4,984.9	[2]	4,579.4	[2]
Property, plant and equipment, net		740.0				662.5						740.0		662.5		627.9
Recognition of defined benefit plan actuarial gains (losses)											$ (2.5)	0.5		(1.9)		(8.6)
Long-lived asset impairment					$ (3.0)
Assets		5,511.4				5,128.5						5,511.4		5,128.5		4,875.7
Depreciation expense												98.6		94.6		93.5
Amortization of intangible assets												31.7		28.1		21.6
Capital expenditures, gross	[3]											165.0		149.3		128.5
Less: proceeds from disposition of assets												(0.4)		(3.9)		(2.5)
Capital expenditures, net												164.6		145.4		126.0
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	[4]											(85.6)		(79.9)		(81.6)
General and administrative expense												(85.2)		(80.9)		(70.1)
Defined benefit plan income												4.2		2.9		6.1
Recognition of defined benefit plan actuarial gains (losses)												0.5		(1.9)		(2.5)
Long-lived asset impairment												(5.1)
Norcraft transaction costs	[5]															(15.1)
Total Corporate expenses												(85.6)		(79.9)		(81.6)
Assets		208.8				157.2						208.8		157.2		165.7
Depreciation expense												3.0		3.7		3.4
Capital expenditures, gross												18.0		0.5		9.4
United States
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	[2]											4,492.2		4,258.5		3,892.9
Net sales	[2]											4,492.2		4,258.5		3,892.9
Property, plant and equipment, net		562.3				499.8						562.3		499.8		498.9
Canada
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	[2]											427.6		406.4		385.1
Net sales	[2]											427.6		406.4		385.1
Property, plant and equipment, net		50.5				45.5						50.5		45.5		39.4
China
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	[2]											202.3		175.0		163.2
Net sales	[2]											202.3		175.0		163.2
Property, plant and equipment, net		24.8				22.7						24.8		22.7		14.4
Other International
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	[2]											161.2		145.0		138.2
Net sales	[2]											161.2		145.0		138.2
Property, plant and equipment, net		13.4				3.7						13.4		3.7		1.0
Mexico
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Property, plant and equipment, net		89.0				90.8						89.0		90.8		74.2
Cabinets [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Assets		2,416.3				2,349.4						2,416.3		2,349.4		2,364.0
Depreciation expense												42.8		40.1		38.1
Amortization of intangible assets												19.7		18.4		14.3
Capital expenditures, gross												63.4		61.7		61.3
Cabinets [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales												2,467.1		2,397.8		2,173.4
Operating income												267.2		257.8		192.4
Net sales												2,467.1		2,397.8		2,173.4
Plumbing [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Assets		1,854.1				1,626.8						1,854.1		1,626.8		1,341.4
Depreciation expense												26.9		24.6		21.3
Amortization of intangible assets												7.7		3.6		1.2
Capital expenditures, gross												43.5		48.3		27.2
Plumbing [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales												1,720.8		1,534.4		1,414.5
Operating income												363.6		326.3		285.4
Net sales												1,720.8		1,534.4		1,414.5
Doors [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Assets		494.8				480.6						494.8		480.6		483.9
Depreciation expense												9.1		9.0		11.2
Amortization of intangible assets												2.3		3.8		3.8
Capital expenditures, gross												20.8		12.9		13.3
Doors [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales												502.9		473.0		439.1
Operating income												74.5		61.9		44.0
Net sales												502.9		473.0		439.1
Security [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Assets		$ 537.4				$ 514.5						537.4		514.5		520.7
Depreciation expense												16.8		17.2		19.5
Amortization of intangible assets												2.0		2.3		2.3
Capital expenditures, gross												19.3		25.9		17.3
Security [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales												592.5		579.7		552.4
Operating income												72.4		66.6		55.9
Net sales												$ 592.5		$ 579.7		$ 552.4

[1] Amounts revised to reflect adoption of ASU 2016-09 "Improvements to Employee Share-Based Payment Accounting."

[2] Based on country of destination

[3] Capital expenditures of $17.2 million, $11.9 million and $20.0 million that have not been paid as of December 31, 2017, 2016 and 2015, respectively, were excluded from the Statement of Cash Flows.

[4] Below is a table detailing Corporate expenses: General and administrative expense $ (85.2 ) $ (80.9 ) $ (70.1 ) Defined benefit plan income 4.2 2.9 6.1 Recognition of defined benefit plan actuarial gains (losses) 0.5 (1.9 ) (2.5 ) Long-lived asset impairment (5.1 ) - - Norcraft transaction costs(b) - - (15.1 ) Total Corporate expenses $ (85.6 ) $ (79.9 ) $ (81.6 )

[5] Representing external costs directly related to the acquisition of Norcraft and primarily includes expenditures for banking, legal, accounting and other similar services.