Information on Business Segments - Net Sales and Operating Income by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,240.0	$ 1,163.7	$ 2,349.5	$ 2,203.7
Operating income	$ 199.1	152.6	$ 354.5	284.4
Operating Income, Percentage Change vs. Prior Year	30.50%		24.60%
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,240.0	1,163.7	$ 2,349.5	2,203.7
Net Sales, Percentage Change vs. Prior Year	6.60%		6.60%
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (38.0)	(50.3)	$ (77.2)	(81.1)
Operating Income, Percentage Change vs. Prior Year	24.50%		4.80%
Water Innovations [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 659.6	617.1	$ 1,284.9	1,211.3
Operating income	$ 150.9	142.1	$ 292.2	270.5
Net Sales, Percentage Change vs. Prior Year	6.90%		6.10%
Operating Income, Percentage Change vs. Prior Year	6.20%		8.00%
Outdoors [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 389.4	375.6	$ 704.4	665.5
Operating income	$ 51.8	61.2	$ 86.0	74.2
Net Sales, Percentage Change vs. Prior Year	3.70%		5.80%
Operating Income, Percentage Change vs. Prior Year	(15.40%)		15.90%
Security [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 191.0	171.0	$ 360.2	326.9
Operating income	$ 34.4	$ (0.4)	$ 53.5	$ 20.8
Net Sales, Percentage Change vs. Prior Year	11.70%		10.20%
Operating Income, Percentage Change vs. Prior Year	8700.00%		157.20%