Segment Information - Reconciliation of Income from Continuing Operations from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 1,123.1	$ 1,099.3	$ 2,133.5	$ 2,116.5
Cost of goods sold	(666.5)	(661.4)	(1,273.6)	(1,288.5)
Segment Income (Loss)	217.7	248.0	420.8	428.8
Restructuring and other	(15.5)	(5.3)	(25.2)	(10.3)
Transformation costs	(22.8)	(11.8)	(37.1)	(28.8)
Asset impairment and write-offs			(47.0)	(0.8)
Loss on sale of business	(26.3)	0.0	(26.3)	0.0
Intangible amortization	(14.3)	(13.4)	(28.5)	(26.9)
Income from continuing operations before income taxes	172.5	220.9	355.4	374.3
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	1,122.8	1,098.8	2,132.8	2,115.7
Segment Income (Loss)	316.0	290.9	586.3	534.6
Operating Segments | Flow
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	397.3	396.8	765.2	781.1
Cost of goods sold	(246.3)	(250.1)	(475.1)	(497.1)
Operating expenses	(57.9)	(62.3)	(113.4)	(122.3)
Segment Income (Loss)	93.1	84.4	176.7	161.7
Operating Segments | Water Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	298.3	310.5	556.5	583.6
Cost of goods sold	(183.8)	(193.8)	(341.6)	(366.3)
Operating expenses	(44.3)	(43.8)	(84.0)	(88.8)
Segment Income (Loss)	70.2	72.9	130.9	128.5
Operating Segments | Pool
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	427.2	391.5	811.1	751.0
Cost of goods sold	(229.0)	(216.5)	(442.8)	(423.0)
Operating expenses	(45.5)	(41.4)	(89.6)	(83.6)
Segment Income (Loss)	152.7	133.6	278.7	244.4
Corporate and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	0.3	0.5	0.7	0.8
Segment Income (Loss)	(19.3)	(19.5)	(47.1)	(45.9)
Reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and other	(10.4)	(5.9)	(20.9)	(10.5)
Transformation costs	(12.5)	(11.8)	(21.6)	(28.8)
Asset impairment and write-offs	(41.8)		(47.0)	(0.8)
Loss on sale of business	(26.3)		(26.3)
Legal accrual adjustments and settlements		7.9		8.2
Intangible amortization	(14.3)	(13.4)	(28.5)	(26.9)
Interest expense, net	(17.9)	(26.3)	(37.6)	(53.6)
Other expense	(1.0)	(1.0)	(1.9)	(2.0)
Income from continuing operations before income taxes	$ 172.5	$ 220.9	$ 355.4	$ 374.3