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Goodwill and Other Identifiable Intangible Assets (Tables) | 3 Months Ended
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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 |

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