Goodwill and Other Identifiable Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2024

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, 2023		Foreign Currency Translation		September 30, 2024
Flow	$	767.1	$	5.1	$	772.2
Water Solutions	1,400.6		1.1		1,401.7
Pool	1,106.9		—		1,106.9
Total goodwill	$	3,274.6	$	6.2	$	3,280.8

Detail of Identifiable Intangible Assets

Identifiable intangible assets consisted of the following:

	September 30, 2024						December 31, 2023
In millions	Cost		Accumulated amortization		Net		Cost		Accumulated amortization		Net
Definite-life intangibles
Customer relationships	$	1,108.1	$	(399.6)	$	708.5	$	1,106.2	$	(361.8)	$	744.4
Proprietary technology and patents	89.8		(47.7)		42.1		89.7		(43.2)		46.5
Total definite-life intangibles	1,197.9		(447.3)		750.6		1,195.9		(405.0)		790.9
Indefinite-life intangibles
Trade names	252.2		—		252.2		251.5		—		251.5
Total intangibles	$	1,450.1	$	(447.3)	$	1,002.8	$	1,447.4	$	(405.0)	$	1,042.4

Estimated Future Amortization Expense for Identifiable Intangible Assets

Estimated future amortization expense for identifiable intangible assets during the remainder of 2024 and the next five years is as follows:

	Q4
	2024		2025		2026		2027		2028		2029
Estimated amortization expense	$	13.6	$	54.2	$	52.9	$	51.6	$	49.0	$	48.6