Leases - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
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| Leases [Abstract] | |||
| Weighted average remaining lease term | 3 years 1 month 6 days | ||
| Cash payment included in the measurement of lease liabilities | $ 64.5 | $ 75.3 | $ 77.6 |
| Operating lease liabilities arising from new or remeasured right-of-use assets | $ 29.6 | $ 27.7 | $ 109.4 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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