Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,155.3	$ 1,261.2	$ 3,504.8	$ 3,464.9
Operating income	$ 205.1	196.5	$ 559.6	481.0
Operating Income, Percentage Change vs. Prior Year	4.40%		16.30%
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,155.3	1,261.2	$ 3,504.8	3,464.9
Net Sales, Percentage Change vs. Prior Year	(8.40%)		1.20%
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (37.1)	(36.7)	$ (114.4)	(117.7)
Operating Income, Percentage Change vs. Prior Year	1.10%		(2.80%)
Water Innovations [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 635.1	688.0	$ 1,920.0	1,899.2
Operating income	$ 151.4	164.2	$ 443.6	434.7
Net Sales, Percentage Change vs. Prior Year	(7.70%)		1.10%
Operating Income, Percentage Change vs. Prior Year	(7.80%)		2.00%
Outdoors [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 342.7	366.4	$ 1,047.1	1,031.9
Operating income	$ 57.8	52.0	$ 143.9	126.2
Net Sales, Percentage Change vs. Prior Year	(6.50%)		1.50%
Operating Income, Percentage Change vs. Prior Year	11.20%		14.00%
Security [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 177.5	206.8	$ 537.7	533.8
Operating income	$ 33.0	$ 17.0	$ 86.5	$ 37.8
Net Sales, Percentage Change vs. Prior Year	(14.20%)		0.70%
Operating Income, Percentage Change vs. Prior Year	94.10%		128.80%