Goodwill and Other Identifiable Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segment were as follows:

In millions	December 31, 2024		Foreign Currency Translation		March 31, 2025
Flow	$	730.4	$	19.5	$	749.9
Water Solutions	1,392.7		4.4		1,397.1
Pool	1,163.5		—		1,163.5
Total goodwill	$	3,286.6	$	23.9	$	3,310.5

Detail of Identifiable Intangible Assets

Identifiable intangible assets consisted of the following:

	March 31, 2025						December 31, 2024
In millions	Cost		Accumulated amortization		Net		Cost		Accumulated amortization		Net
Definite-life intangibles
Customer relationships	$	1,077.7	$	(343.9)	$	733.8	$	1,146.5	$	(400.2)	$	746.3
Proprietary technology and patents	75.2		(36.1)		39.1		88.8		(48.4)		40.4
Total definite-life intangibles	1,152.9		(380.0)		772.9		1,235.3		(448.6)		786.7
Indefinite-life intangibles
Trade names	249.6		—		249.6		247.1		—		247.1
Total intangibles	$	1,402.5	$	(380.0)	$	1,022.5	$	1,482.4	$	(448.6)	$	1,033.8

Estimated Future Amortization Expense for Identifiable Intangible Assets

Estimated future amortization expense for identifiable intangible assets during the remainder of 2025 and the next five years is as follows:

	Q2 - Q4
	2025		2026		2027		2028		2029		2030
Estimated amortization expense	$	42.9	$	55.9	$	54.6	$	52.1	$	51.7	$	51.2