NOTE 4. INTANGIBLE ASSETS AND GOODWILL Intangible assets consisted of the following: | | | | | | | | | | | | | | June 30, 2026 | | | Gross Carrying | | Accumulated | | Net Carrying | | Weighted-Average Remaining | | | Amount | | Amortization | | Amount | | Useful Life (in years) | | | | (in millions) | | | Technology | | $ | 101.0 | | $ | (80.1) | | $ | 20.9 | | 6.4 | Customer relationships | | | 170.3 | | | (91.7) | | | 78.6 | | 7.3 | Trademarks and other | | | 26.8 | | | (19.1) | | | 7.7 | | 3.1 | Total | | $ | 298.1 | | $ | (190.9) | | $ | 107.2 | | 6.8 | | | | | | | | | | | | | | | December 31, 2025 | | | Gross Carrying | | Accumulated | | Net Carrying | | Weighted-Average Remaining | | | Amount | | Amortization | | Amount | | Useful Life (in years) | | | | (in millions) | | | Technology | | $ | 101.8 | | $ | (78.2) | | $ | 23.6 | | 6.6 | Customer relationships | | | 171.4 | | | (86.3) | | | 85.1 | | 7.7 | Trademarks and other | | | 27.3 | | | (18.3) | | | 9.0 | | 3.6 | Total | | $ | 300.5 | | $ | (182.8) | | $ | 117.7 | | 7.2 |
Amortization expense related to intangible assets is as follows: | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | | | 2026 | | 2025 | | 2026 | | 2025 | | | | | (in millions) | | Amortization expense | | $ | 5.2 | | $ | 5.6 | | $ | 10.5 | | $ | 11.1 | |
Estimated future amortization expense related to intangibles is as follows: | | | | Year Ending December 31, | | | (in millions) | 2026 (remaining) | | $ | 9.6 | 2027 | | | 17.8 | 2028 | | | 16.6 | 2029 | | | 15.0 | 2030 | | | 13.4 | Thereafter | | | 34.8 | Total | | $ | 107.2 |
The following table summarizes the changes in goodwill: | | | | | | (in millions) | December 31, 2025 | | $ | 300.8 | Foreign currency translation and other | | | (1.0) | June 30, 2026 | | $ | 299.8 |
|