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Derivative Financial Instruments - Schedule of Notional Amounts of Outstanding Forward Contracts and Options (Parenthetical) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Sep. 30, 2025
Foreign Exchange Forward | Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	$ 677.5	$ 835.4
Foreign Exchange Forward | Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	40.4	41.9
Options | Euro / U.S. Dollar
Derivative [Line Items]
Notional amount	143.3	367.4
Options | Japanese Yen / U.S. Dollar
Derivative [Line Items]
Notional amount	$ 58.0	$ 89.4

X

- 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

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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
-Paragraph 1A
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