Goodwill and Other Identifiable Intangible Assets (Tables)

9 Months Ended

Sep. 30, 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		Acquisitions		Foreign Currency Translation		September 30, 2025
Flow	$	730.4	$	166.6	$	62.1	$	959.1
Water Solutions	1,392.7		—		13.5		1,406.2
Pool	1,163.5		—		—		1,163.5
Total goodwill	$	3,286.6	$	166.6	$	75.6	$	3,528.8

Detail of Identifiable Intangible Assets

Identifiable intangible assets consisted of the following:

	September 30, 2025						December 31, 2024
In millions	Cost		Accumulated amortization		Net		Cost		Accumulated amortization		Net
Definite-life intangibles
Customer relationships	$	1,163.9	$	(373.5)	$	790.4	$	1,146.5	$	(400.2)	$	746.3
Proprietary technology and patents	82.3		(39.8)		42.5		88.8		(48.4)		40.4
Total definite-life intangibles	1,246.2		(413.3)		832.9		1,235.3		(448.6)		786.7
Indefinite-life intangibles
Trade names	255.1		—		255.1		247.1		—		247.1
Total intangibles	$	1,501.3	$	(413.3)	$	1,088.0	$	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:

	Q4
	2025		2026		2027		2028		2029		2030
Estimated amortization expense	$	15.7	$	61.5	$	60.2	$	57.6	$	57.1	$	56.6