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Restructuring and Impairment Charges - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($) position
Restructuring Cost and Reserve [Line Items]
Number of positions reduced | position			160
Restructuring charges	$ 0.0	$ 0.0
Employee separation
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 8.0

X

- Definition

The number of positions eliminated during the period as a result of restructuring activities.

+ References

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- 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.

+ References

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- Definition

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