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Goodwill and Other Intangible Assets | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets The changes in the net carrying value of goodwill by reportable segment for the nine months ended September 30, 2025 are as follows:
| Sealing Technologies |  | Advanced Surface Technologies |  | Total
| (in millions)
Goodwill as of December 31, 2024 | $ | 364.0 |  |  | $ | 532.2 |  |  | $ | 896.2 |
Foreign currency translation | 10.1 |  |  | — |  |  | 10.1 |
Goodwill as of September 30, 2025 | $ | 374.1 |  |  | $ | 532.2 |  |  | $ | 906.3 |
The goodwill balances reflected above at September 30, 2025 are net of accumulated impairment losses of $27.8 million for the Sealing Technologies segment and $126.0 million for the Advanced Surface Technologies segment. Identifiable intangible assets are as follows:
| September 30, 2025 |  | December 31, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
| (in millions)
Definite-Lived: |  |  |  |  |  |  |
Customer relationships | $ | 497.7 |  |  | $ | 232.7 |  |  | $ | 493.6 |  |  | $ | 209.9 |
Existing technology | 570.4 |  |  | 176.3 |  |  | 567.5 |  |  | 143.9 |
Trademarks | 70.6 |  |  | 40.5 |  |  | 69.4 |  |  | 34.9 |
Other | 24.8 |  |  | 22.9 |  |  | 26.6 |  |  | 22.9 |
| 1,163.5 |  |  | 472.4 |  |  | 1,157.1 |  |  | 411.6 |
Indefinite-Lived: |  |  |  |  |  |  |
In-process research and development | 14.0 |  |  | — |  |  | 14.0 |  |  | — |
Trademarks | 30.9 |  |  | — |  |  | 30.8 |  |  | — |
Total | $ | 1,208.4 |  |  | $ | 472.4 |  |  | $ | 1,201.9 |  |  | $ | 411.6 |
Amortization for the quarters and nine months ended September 30, 2025 and 2024 was $18.8 million, $19.1 million $56.9 million and $56.8 million, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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