Segment Information - Reconciliation of Income from Continuing Operations from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,010.4	$ 1,017.2
Cost of goods sold	(607.1)	(627.1)
Segment Income (Loss)	203.1	180.8
Restructuring and other	(9.7)	(5.0)
Transformation costs	(14.3)	(17.0)
Asset impairment and write-offs	(5.2)	(0.8)
Intangible amortization	(14.2)	(13.5)
Income from continuing operations before income taxes	182.9	153.4
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	1,010.0	1,016.9
Segment Income (Loss)	270.3	243.7
Operating Segments | Flow
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	367.9	384.3
Cost of goods sold	(228.8)	(247.0)
Operating expenses	(55.5)	(60.0)
Segment Income (Loss)	83.6	77.3
Operating Segments | Water Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	258.2	273.1
Cost of goods sold	(157.8)	(172.5)
Operating expenses	(39.7)	(45.0)
Segment Income (Loss)	60.7	55.6
Operating Segments | Pool
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	383.9	359.5
Cost of goods sold	(213.8)	(206.5)
Operating expenses	(44.1)	(42.2)
Segment Income (Loss)	126.0	110.8
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	0.4	0.3
Segment Income (Loss)	(27.8)	(26.4)
Reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and other	(10.5)	(4.6)
Transformation costs	(9.1)	(17.0)
Asset impairment and write-offs	(5.2)	(0.8)
Legal accrual adjustments and settlements		0.3
Intangible amortization	(14.2)	(13.5)
Interest expense, net	(19.7)	(27.3)
Other expense	(0.9)	(1.0)
Income from continuing operations before income taxes	$ 182.9	$ 153.4