v3.25.4

Financial Instruments and Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Concentration Risk [Line Items]
Interest income	$ 0.9	$ 1.8
Impairment of property, plant and equipment	$ 0.0	10.4
Cost of products sold
Concentration Risk [Line Items]
Impairment of property, plant and equipment		6.1
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	38.10%

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