Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,459.0	$ 1,380.8	$ 4,294.1	$ 4,064.4
Operating income	$ 168.0	147.1	$ 506.0	455.1
Net Sales, Percentage Change vs. Prior Year	5.70%		5.70%
Operating Income, Percentage Change vs. Prior Year	14.20%		11.20%
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (19.2)	(19.2)	$ (58.4)	(61.9)
Operating Income, Percentage Change vs. Prior Year	0.00%		5.70%
Cabinets [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 589.7	599.0	$ 1,797.7	1,793.8
Operating income	$ 25.1	28.7	$ 134.0	122.2
Net Sales, Percentage Change vs. Prior Year	(1.60%)		0.20%
Operating Income, Percentage Change vs. Prior Year	(12.50%)		9.70%
Plumbing [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 514.1	461.5	$ 1,478.8	1,394.9
Operating income	$ 112.0	89.4	$ 307.9	273.1
Net Sales, Percentage Change vs. Prior Year	11.40%		6.00%
Operating Income, Percentage Change vs. Prior Year	25.30%		12.70%
Doors & Security [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 355.2	320.3	$ 1,017.6	875.7
Operating income	$ 50.1	$ 48.2	$ 122.5	$ 121.7
Net Sales, Percentage Change vs. Prior Year	10.90%		16.20%
Operating Income, Percentage Change vs. Prior Year	3.90%		0.70%