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Restructuring and Asset Impairment Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring and asset impairment charges	$ 0.0	$ 3.6
Restructuring charges excluding noncash impairments	$ 0.0		$ 1.1	$ 1.1
Business Exit, Oil And Gas \| Performance Engineered Products
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges		$ 2.5

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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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.

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