Goodwill and Other Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024 by reportable segment were as follows:

In millions	December 31, 2024		Acquisitions		Foreign  currency translation		December 31, 2025
Flow	$	730.4	$	169.2	$	67.9	$	967.5
Water Solutions	1,392.7		—		14.4		1,407.1
Pool	1,163.5		—		—		1,163.5
Total goodwill	$	3,286.6	$	169.2	$	82.3	$	3,538.1

In millions	December 31, 2023		Acquisitions		Foreign currency translation		December 31, 2024
Flow	$	767.1	$	—	$	(36.7)	$	730.4
Water Solutions	1,400.6		—		(7.9)		1,392.7
Pool	1,106.9		56.6		—		1,163.5
Total goodwill	$	3,274.6	$	56.6	$	(44.6)	$	3,286.6

Identifiable Intangible Assets

Identifiable intangible assets consisted of the following at December 31:

	2025						2024
In millions	Cost		Accumulated amortization		Net		Cost		Accumulated amortization		Net
Definite-life intangibles
Customer relationships	$	1,166.0	$	(389.4)	$	776.6	$	1,146.5	$	(400.2)	$	746.3
Proprietary technology and patents	82.4		(41.6)		40.8		88.8		(48.4)		40.4
Total definite-life intangibles	1,248.4		(431.0)		817.4		1,235.3		(448.6)		786.7
Indefinite-life intangibles
Trade names	255.9		—		255.9		247.1		—		247.1
Total intangibles	$	1,504.3	$	(431.0)	$	1,073.3	$	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 next five years is as follows:

In millions	2026		2027		2028		2029		2030
Estimated amortization expense	$	61.6	$	60.3	$	57.6	$	57.2	$	56.6