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Goodwill and Acquired Intangible Assets - Schedule of Goodwill and Acquired Intangible Assets (Parenthetical) (Details) | 12 Months Ended
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Sep. 30, 2025
Weighted average useful lives (in years) | 16 years
Purchased Software |
Weighted average useful lives (in years) | 11 years
Customer Lists and Relationships |
Weighted average useful lives (in years) | 17 years
Trademarks and Trade Names |
Weighted average useful lives (in years) | 11 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 + Details
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