Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Intangible Asset, Finite-Lived [Line Items] | ||
| Amortized intangible assets - net | $ 6.5 | $ 7.0 |
| Goodwill | 15.4 | 15.4 |
| Total Goodwill and Other Intangible Assets | 21.9 | 22.4 |
| Patents | ||
| Intangible Asset, Finite-Lived [Line Items] | ||
| Amortized intangible assets - gross | 10.8 | 10.8 |
| Amortized intangible assets - accumulated amortization | (6.0) | (5.7) |
| Amortized intangible assets - net | 4.8 | 5.1 |
| Customer Relationship and Other | ||
| Intangible Asset, Finite-Lived [Line Items] | ||
| Amortized intangible assets - gross | 5.2 | 5.3 |
| Amortized intangible assets - accumulated amortization | (3.5) | (3.4) |
| Amortized intangible assets - net | $ 1.7 | $ 1.9 |
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- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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, after accumulated amortization, of finite- and indefinite-lived intangible assets, goodwill, and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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