Basis of Presentation and Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Accounting Policies [Abstract] | ||
| Operating leases | $ 39.0 | $ 119.0 |
| Finance leases | $ 0.0 | $ 5.0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. 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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