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Goodwill and Other Identifiable Intangible Assets
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Identifiable Intangible Assets Goodwill and Other Identifiable Intangible Assets
The changes in the carrying amount of goodwill by reportable segment were as follows:
In millionsDecember 31,
2024		AcquisitionsForeign Currency
Translation		September 30,
2025
Flow$730.4 $166.6 $62.1 $959.1 
Water Solutions1,392.7 — 13.5 1,406.2 
Pool1,163.5 — — 1,163.5 
Total goodwill$3,286.6 $166.6 $75.6 $3,528.8 
Identifiable intangible assets consisted of the following:
 September 30, 2025December 31, 2024
In millionsCostAccumulated
amortization		NetCostAccumulated
amortization		Net
Definite-life intangibles
Customer relationships$1,163.9 $(373.5)$790.4 $1,146.5 $(400.2)$746.3 
Proprietary technology and patents82.3 (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 names255.1 — 255.1 247.1 — 247.1 
Total intangibles$1,501.3 $(413.3)$1,088.0 $1,482.4 $(448.6)$1,033.8 
Identifiable intangible asset amortization expense was $13.9 million and $13.5 million for the three months ended September 30, 2025 and 2024, and $42.4 million and $40.4 million for the nine months ended September 30, 2025 and 2024, respectively.
An impairment charge of $30.9 million was recorded during the nine months ended September 30, 2025 related to the write-off of a definite-lived customer relationship intangible asset as a result of a business exit within our Water Solutions segment during the second quarter of 2025. The impairment charge was recorded in Selling, general and administrative expenses in the Condensed Consolidated Statements of Operations and Comprehensive Income. No impairment was recognized for identifiable intangible assets for the three months ended September 30, 2025 and the three and nine months ended September 30, 2024.
Estimated future amortization expense for identifiable intangible assets during the remainder of 2025 and the next five years is as follows:
 
Q4
     
202520262027202820292030
Estimated amortization expense$15.7 $61.5 $60.2 $57.6 $57.1 $56.6