Goodwill and Other Intangible Assets, Net - Schedule of Goodwill (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|---|---|---|---|
| Goodwill [Line Items] | |||
| Goodwill | $ 376.0 | $ 376.0 | $ 376.0 |
| Total goodwill | 227.3 | 227.3 | 227.3 |
| Specialty Alloys Operations | |||
| Goodwill [Line Items] | |||
| Total goodwill | 195.5 | 195.5 | 195.5 |
| Performance Engineered Products | |||
| Goodwill [Line Items] | |||
| Total goodwill | $ 31.8 | $ 31.8 | $ 31.8 |
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- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Includes amount, before amortization expense and impairment loss, of goodwill for private company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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