Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	$ 248.0	$ 208.5	$ 428.8	$ 392.1
Asset impairment and write-offs			(0.8)	(4.4)
Transformation costs	(11.8)	(6.0)	(28.8)	(14.5)
Intangible amortization	(13.4)	(13.9)	(26.9)	(27.7)
Interest expense, net	(26.3)	(31.8)	(53.6)	(64.2)
Other expense (income)	(0.8)	4.8	(0.9)	4.1
Income from continuing operations before income taxes	220.9	181.5	374.3	332.0
Reportable segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	290.9	254.7	534.6	488.3
Reportable segments \| Flow
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	84.4	74.8	161.7	139.8
Reportable segments \| Water Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	72.9	74.8	128.5	127.2
Reportable segments \| Pool
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	133.6	105.1	244.4	221.3
Corporate and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	(19.5)	(20.5)	(45.9)	(43.1)
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Asset impairment and write-offs	0.0	(0.5)	(0.8)	(4.4)
Restructuring and other	(5.9)	(0.6)	(10.5)	(3.5)
Transformation costs	(11.8)	(6.0)	(28.8)	(14.5)
Intangible amortization	(13.4)	(13.9)	(26.9)	(27.7)
Legal Accrual Adjustments and Settlements	7.9	(4.1)	8.2	(2.2)
Interest expense, net	(26.3)	(31.8)	(53.6)	(64.2)
Other expense (income)	$ (1.0)	$ 4.2	$ (2.0)	$ 3.3

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