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Intangible Assets | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible Assets The gross carrying amount and accumulated amortization for intangible assets as of September 30, 2025 consisted of the following (in millions):
| September 30, 2025
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Amortized Intangible Assets
Customer relationships | $ | 756.2 |  |  | $ | 300.6 |  |  | $ | 455.6 |
Acquired and developed technology | 93.2 |  |  | 57.0 |  |  | 36.2 |
Trade names | 49.4 |  |  | 12.4 |  |  | 37.0 |
Non-compete agreements | 2.9 |  |  | 2.9 |  |  | — |
Patents | 1.9 |  |  | 1.8 |  |  | 0.1 |
Total | $ | 903.6 |  |  | $ | 374.7 |  |  | $ | 528.9 |
The gross carrying amount and accumulated amortization for intangible assets as of December 31, 2024 consisted of the following (in millions):
| December 31, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Amortized Intangible Assets
Customer relationships | $ | 726.6 |  |  | $ | 254.3 |  |  | $ | 472.3 |
Acquired and developed technology | 90.3 |  |  | 47.9 |  |  | 42.4 |
Trade names | 47.2 |  |  | 9.4 |  |  | 37.8 |
Non-compete agreements | 2.9 |  |  | 2.9 |  |  | — |
Patents | 1.9 |  |  | 1.0 |  |  | 0.9 |
Total | $ | 868.9 |  |  | $ | 315.5 |  |  | $ | 553.4 |
Amortization expense of intangible assets was $16.0 million and $15.4 million for the three months ended September 30, 2025 and 2024, respectively, and $47.3 million and $46.9 million for the nine months ended September 30, 2025 and 2024, respectively. Intangibles are expensed using the straight-line amortization method.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/985-20/tableOfContent + Details
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