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v3.25.2

Financial Instruments and Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Concentration Risk [Line Items] |  |  |  |  |
Interest income |  | $ 1.5 | $ 3.1 | $ 4.6 | $ 9.4
Impairment of property, plant and equipment |  |  |  | 10.6 | $ 0.0
Cost of products sold |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Impairment of property, plant and equipment |  |  |  | 6.3 |
Research and development expense |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Impairment of property, plant and equipment |  |  |  | $ 4.3 |
Customer Concentration Risk | Revenues | Three Customers In Aggregate |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 40.70% |  | 41.20% |
Customer Concentration Risk | Trade Receivables | Two Customers In Aggregate |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 29.10% |  |  |  |

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