Business Segment Information - Additional Information (Details) $ in Millions	12 Months Ended
Sep. 30, 2023 USD ($) customer	Sep. 30, 2022 USD ($) customer	Sep. 30, 2021 USD ($) customer
Percentage Of Sale Of Customer Maximum	10.00%	10.00%	10.00%
Capitalized Computer Software, Period Increase (Decrease)	$ 12.4	$ 12.9	$ 8.8
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	$ 21.6	$ 22.4	$ 21.2

Number of customers who exceeded the benchmark percentage of concentration.

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- Definition

Percentage Of Sale Of Customer Maximum

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481283/985-20-50-1

+ Details

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

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- Details

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- Details

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