Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,507.2	$ 1,429.0	$ 2,835.1	$ 2,683.6
Operating income	$ 202.4	188.6	$ 338.0	308.0
Net Sales, Percentage Change vs. Prior Year	5.50%		5.60%
Operating Income, Percentage Change vs. Prior Year	7.30%		9.70%
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (20.0)	(21.4)	$ (39.2)	(42.7)
Operating Income, Percentage Change vs. Prior Year	6.50%		8.20%
Cabinets [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 635.0	637.6	$ 1,208.0	1,194.8
Operating income	$ 65.7	69.4	$ 108.9	93.5
Net Sales, Percentage Change vs. Prior Year	(0.40%)		1.10%
Operating Income, Percentage Change vs. Prior Year	(5.30%)		16.50%
Plumbing [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 506.1	483.7	$ 964.7	933.4
Operating income	$ 106.7	95.3	$ 195.9	183.7
Net Sales, Percentage Change vs. Prior Year	4.60%		3.40%
Operating Income, Percentage Change vs. Prior Year	12.00%		6.60%
Doors & Security [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 366.1	307.7	$ 662.4	555.4
Operating income	$ 50.0	$ 45.3	$ 72.4	$ 73.5
Net Sales, Percentage Change vs. Prior Year	19.00%		19.30%
Operating Income, Percentage Change vs. Prior Year	10.40%		(1.50%)