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Summary of Significant Accounting Policies - Capitalized Direct Costs (Details) - USD ($) $ in Millions | 12 Months Ended |
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Sep. 30, 2022 | Sep. 30, 2021
Property, Plant and Equipment, Gross [Abstract] |  |
Capitalized computer software, gross | $ 26.9 | $ 22.7
Software Development |  |
Property, Plant and Equipment, Gross [Abstract] |  |
Capitalized computer software, gross | 8.6 |
Capitalized computer software costs | $ 4.2 |

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- Definition Additions made to capitalized computer software costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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- Details
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