Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	$ 179.9	$ 180.1	$ 608.7	$ 572.2
Asset impairment and write-offs			(9.3)	(6.2)
Transformation costs	(15.4)	(13.9)	(44.2)	(28.4)
Intangible amortization	(13.5)	(13.8)	(40.4)	(41.5)
Interest expense, net	(19.8)	(27.5)	(73.4)	(91.7)
Other (income) expense	0.1	0.3	(0.8)	4.4
Income from continuing operations before income taxes	160.2	152.9	534.5	484.9
Reportable segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	259.9	236.9	794.5	725.2
Reportable segments \| Flow
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	82.8	77.5	244.5	217.3
Reportable segments \| Water Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	64.4	68.8	192.9	196.0
Reportable segments \| Pool
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	112.7	90.6	357.1	311.9
Corporate and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segment income	(20.7)	(24.8)	(66.6)	(67.9)
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Asset impairment and write-offs	(8.5)	(1.8)	(9.3)	(6.2)
Restructuring and other	(23.4)	(1.6)	(33.9)	(5.1)
Transformation costs	(12.6)	(13.5)	(41.4)	(28.0)
Intangible amortization	(13.5)	(13.8)	(40.4)	(41.5)
Legal Accrual Adjustments and Settlements	(0.7)	0.0	7.5	(2.2)
Interest expense, net	(19.8)	(27.5)	(73.4)	(91.7)
Other (income) expense	$ (0.5)	$ (1.0)	$ (2.5)	$ 2.3

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