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Business Segment Information - Additional Information (Details) $ in Millions | 12 Months Ended
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Sep. 30, 2019 USD ($) segment | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($)
Number of reportable segments | segment | 4 |  |
Percentage of Sale of Customer Maximum | 10.00% | 10.00% |
Capitalized Computer Software, Period Increase (Decrease) | $ 8.4 | $ 9.5 | $ 9.0
Property, Plant and Equipment |  |  |
Depreciation | $ 20.6 | $ 19.4 | $ 15.9

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Details
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