Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 2,111.0	$ 1,936.1	$ 4,028.3	$ 3,707.1
Operating income	$ 284.1	294.9	$ 537.5	543.3
Net Sales, Percentage Change vs. Prior Year	(9.00%)		(8.70%)
Operating Income, Percentage Change vs. Prior Year	(3.70%)		(1.10%)
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (37.9)	(26.9)	$ (67.6)	(51.8)
Operating Income, Percentage Change vs. Prior Year	40.90%		30.50%
Water Innovations [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 650.0	694.6	$ 1,293.6	1,316.2
Operating income	$ 160.7	168.9	$ 310.0	316.8
Net Sales, Percentage Change vs. Prior Year	(6.40%)		(1.70%)
Operating Income, Percentage Change vs. Prior Year	(4.90%)		(2.10%)
Outdoors & Security [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 605.4	535.5	$ 1,102.0	997.0
Operating income	$ 92.5	78.5	$ 152.7	131.3
Net Sales, Percentage Change vs. Prior Year	(13.10%)		10.50%
Operating Income, Percentage Change vs. Prior Year	(17.80%)		(16.30%)
Cabinets [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 855.6	706.0	$ 1,632.7	1,393.9
Operating income	$ 68.8	$ 74.4	$ 142.4	$ 147.0
Net Sales, Percentage Change vs. Prior Year	(21.20%)		(17.10%)
Operating Income, Percentage Change vs. Prior Year	(7.50%)		(3.10%)