ACQUISITIONS - Other Acquisitions (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Sep. 21, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2024 |
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| Business Combination [Line Items] | ||||
| Acquisition of businesses, net of cash acquired | $ 4,389 | $ 419 | $ 2,347 | |
| GOODWILL | $ 12,946 | 10,612 | $ 10,419 | |
| Minimum | ||||
| Business Combination [Line Items] | ||||
| Estimated useful life of aircraft (in years) | 25 years | |||
| Maximum | ||||
| Business Combination [Line Items] | ||||
| Estimated useful life of aircraft (in years) | 30 years | |||
| Other Acquisitions | ||||
| Business Combination [Line Items] | ||||
| Acquisition of businesses, net of cash acquired | $ 434 | 284 | ||
| GOODWILL | 176 | 147 | ||
| Other intangible assets | $ 134 | 90 | ||
| Goodwill and Intangible Assets, Deductible For Tax Purposes, Term | 15 years | |||
| Amount of goodwill expected to be tax deductible | $ 112 | 147 | ||
| Business acquisition, intangible assets, expected tax deductible amount | $ 95 | $ 90 | ||
| Business Combination, Price of Acquisition, Expected | $ 240 | |||
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- Definition Estimated useful life of aircrafts after the delivery No definition available.
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- Definition Business Acquisition, Intangible Assets, Expected Tax Deductible Amount No definition available.
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- Definition Goodwill and Intangible Assets, Deductible For Tax Purposes, Term No definition available.
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- 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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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Purchase price of expected business acquisition prior to consideration being transferred. Excludes asset acquisition. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of identifiable intangible asset acquired in business combination and recognized at acquisition date. Excludes goodwill and financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after accumulated impairment loss, of 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://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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