Basis of Presentation and Significant Accounting Policies - Goodwill and Indefinite-lived Intangible Assets (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
| Goodwill and Indefinite-lived Intangible Assets | |||
| Impairment losses in connection with the goodwill | $ 0 | $ 0 | $ 0 |
| Impairment of intangible assets with indefinite lives | $ 0 | $ 0 | $ 0 |
| X | ||||||||||
- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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