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Business Segment Information - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2024 USD ($) customer	Sep. 30, 2023 USD ($) customer	Sep. 30, 2022 USD ($) customer
Percentage Of Sale Of Customer Maximum	10.00%	10.00%	10.00%
Capitalized Computer Software, Period Increase (Decrease)	$ 12.1	$ 12.4	$ 12.9
Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Number of customers who exceeded 10% of sales | customer	0	0	0
Property, Plant and Equipment
Depreciation	$ 22.6	$ 21.6	$ 22.4

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Number of customers who exceeded the benchmark percentage of concentration.

+ References

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Percentage Of Sale Of Customer Maximum

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- Definition

Amount of increase (decrease) in capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-2

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
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-SubTopic 10
-Topic 230
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