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Derivative Financial Instruments - Additional Information (Details) - USD ($) $ in Millions | 6 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Derivative [Line Items] |  |
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Net | $ (1.9) | $ (1.1)
Maximum | Forward contracts | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, remaining maturity | 3 months |
Maximum | Forward contracts | Designated as Hedging Instrument | Net Investment Hedging |  |
Derivative [Line Items] |  |
Derivative, remaining maturity | 3 months |
Maximum | Foreign Exchange Options | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, remaining maturity | 14 months |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC + Details
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