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INTANGIBLE ASSETS AND GOODWILL | 3 Months Ended
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Mar. 31, 2025
INTANGIBLE ASSETS AND GOODWILL |
INTANGIBLE ASSETS AND GOODWILL | NOTE 9. INTANGIBLE ASSETS AND GOODWILL Intangible assets consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2025
​ |  | Gross Carrying |  | Accumulated |  | Net Carrying |  | Weighted Average Remaining
​ | ​ | Amount | ​ | Amortization | ​ | Amount |  | Useful Life (in years)
​ | ​ | (in millions) | ​ | ​
Technology | ​ | $ | 100.5 | ​ | $ | (72.2) | ​ | $ | 28.3 | ​ | 6.8
Customer relationships | ​ |  | 169.6 | ​ | ​ | (74.8) | ​ |  | 94.8 | ​ | 8.3
Trademarks and other | ​ |  | 27.1 | ​ | ​ | (16.2) | ​ |  | 10.9 | ​ | 4.4
Total | ​ | $ | 297.2 | ​ | $ | (163.2) | ​ | $ | 134.0 | ​ | 7.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ |  | Gross Carrying |  | Accumulated |  | Net Carrying | ​ | Weighted Average Remaining
​ | ​ | Amount | ​ | Amortization | ​ | Amount | ​ | Useful Life (in years)
​ | ​ | (in millions) | ​ | ​
Technology | ​ | $ | 99.9 | ​ | $ | (70.0) | ​ | $ | 29.9 | ​ | 7.0
Customer relationships | ​ |  | 168.9 | ​ | ​ | (70.9) | ​ |  | 98.0 | ​ | 8.5
Trademarks and other | ​ |  | 27.1 | ​ | ​ | (15.6) | ​ |  | 11.5 | ​ | 4.6
Total | ​ | $ | 295.9 | ​ | $ | (156.5) | ​ | $ | 139.4 | ​ | 7.9
​ Amortization expense related to intangible assets is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​
​ |  | 2025 |  | 2024 |
​ | ​ | (in millions) | ​
Amortization expense | ​ | $ | 5.5 | ​ | $ | 6.9 | ​
​ Estimated future amortization expense related to intangibles is as follows: ​
​ | ​ | ​ | ​
Year Ending December 31, |  | ​ | (in millions)
2025 (remaining) | ​ | $ | 16.6
2026 | ​ |  | 20.0
2027 | ​ |  | 17.8
2028 | ​ |  | 16.5
2029 | ​ | ​ | 14.9
Thereafter | ​ |  | 48.2
Total | ​ | $ | 134.0
​ ​ ​ ​ ​ The following table summarizes the changes in goodwill: ​
​ | ​ | ​ | ​
​ | ​ | (in millions)
December 31, 2024 | ​ | $ | 296.0
Foreign currency translation and other | ​ | ​ | 1.3
March 31, 2025 |  | $ | 297.3
​

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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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