A summary of the Company's other intangible assets follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | December 31, 2025 | (in millions) | | Acquired Cost | | Accumulated Amortization | | Net Book Value | | Acquired Cost | | Accumulated Amortization | | Net Book Value | | | | | | | | | | | | | | | Customer relationships | | $ | 1,476.8 | | | $ | (506.7) | | | $ | 970.1 | | | $ | 1,479.6 | | | $ | (483.6) | | | $ | 996.0 | | | Indefinite-lived trade names | | 253.8 | | | — | | | 253.8 | | | 254.4 | | | — | | | 254.4 | | | Technology | | 202.5 | | | (118.7) | | | 83.8 | | | 203.3 | | | (116.6) | | | 86.7 | | | Definite-lived trade names | | 117.4 | | | (44.5) | | | 72.9 | | | 117.6 | | | (43.1) | | | 74.5 | | | | | | | | | | | | | | | | Other | | 44.7 | | | (31.9) | | | 12.8 | | | 44.3 | | | (30.4) | | | 13.9 | | | Other intangible assets | | $ | 2,095.2 | | | $ | (701.8) | | | $ | 1,393.4 | | | $ | 2,099.2 | | | $ | (673.7) | | | $ | 1,425.5 | |
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