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Goodwill and Other Intangible Assets | 9 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets Changes in the carrying amount of goodwill were as follows ($000):
| Nine Months Ended March 31, 2025
| Networking |  | Materials |  | Lasers |  | Total
Balance-beginning of period | $ | 1,036,592 |  |  | $ | 245,983 |  |  | $ | 3,181,754 |  |  | $ | 4,464,329 |
Foreign currency translation | 371 |  |  | 2,813 |  |  | (9,553) |  |  | (6,369) |
Balance-end of period | $ | 1,036,963 |  |  | $ | 248,796 |  |  | $ | 3,172,201 |  |  | $ | 4,457,960 |
We test goodwill for impairment annually during the fourth quarter of our fiscal year, or more frequently when events or changes in circumstances indicate that fair value is below carrying value. The gross carrying amount and accumulated amortization of our intangible assets other than goodwill were as follows ($000):
| March 31, 2025 |  | June 30, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Technology | $ | 1,655,392 |  |  | $ | (505,233) |  |  | $ | 1,150,159 |  |  | $ | 1,653,289 |  |  | $ | (394,040) |  |  | $ | 1,259,249 |
Trade Names | 438,470 |  |  | (8,470) |  |  | 430,000 |  |  | 438,470 |  |  | (8,470) |  |  | 430,000 |
Customer Lists | 2,324,545 |  |  | (622,187) |  |  | 1,702,358 |  |  | 2,310,550 |  |  | (498,252) |  |  | 1,812,298 |
Backlog and Other | 86,616 |  |  | (86,616) |  |  | — |  |  | 88,792 |  |  | (87,092) |  |  | 1,700 |
Total | $ | 4,505,023 |  |  | $ | (1,222,506) |  |  | $ | 3,282,517 |  |  | $ | 4,491,101 |  |  | $ | (987,854) |  |  | $ | 3,503,247 |
Amortization expense in the quarter ended March 31, 2025 includes a total of $17 million of impairment charges in the Materials segment related to the abandonment of certain purchased technology and licenses, with $14 million recorded in cost of goods sold and $3 million recorded in R&D in our Consolidated Statements of Earnings (Loss).

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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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