Fair Value Measurements - Additional Information (Details) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Sep. 30, 2025 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Fair value, assets, level 1 to level 2 transfers | $ 0 | $ 0 | |
| Fair value, assets, level 2 to level 1 transfers | 0 | 0 | |
| Fair value, assets, level 2 to level 3 transfers | 0 | 0 | |
| Fair value, assets, level 3 to level 2 transfers | 0 | 0 | |
| Fair value, assets, level 1 to level 3 transfers | 0 | 0 | |
| Fair value, assets, level 3 to level 1 transfers | 0 | 0 | |
| Fair value, liabilities, level 1 to level 2 transfers | 0 | 0 | |
| Fair value, liabilities, level 2 to level 1 transfers | 0 | 0 | |
| Fair value, liabilities, level 2 to level 3 transfers | 0 | 0 | |
| Fair value, liabilities, level 3 to level 2 transfers | 0 | 0 | |
| Fair value, liabilities, level 1 to level 3 transfers | 0 | 0 | |
| Fair value, liabilities, level 3 to level 1 transfers | 0 | 0 | |
| Reclassified out of accumulated other comprehensive income | 0 | $ 0 | |
| Assets held for sale | $ 0 | $ 7,600,000 | |
| X | ||||||||||
- Definition Fair value assets level 1 to level 2 transfer amount. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 3. No definition available.
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| X | ||||||||||
- Definition Fair value assets level 2 to level1 transfer amount. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 1. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2. No definition available.
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| X | ||||||||||
- Definition Fair value liabilities level1 to level2 transfer amount. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 3. No definition available.
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| X | ||||||||||
- Definition Fair value liabilities level 2 to level1 transfer amount. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of liabilities measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 1. No definition available.
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| X | ||||||||||
- Definition Amount of transfers of liabilities measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2. No definition available.
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| X | ||||||||||
- Definition Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| 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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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