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GOODWILL AND OTHER INTANGIBLES - Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets By Major Class (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Intangibles Other Than Goodwill [Line Items] |  |
Gross carrying amount | $ 15,832 | $ 15,628
Less: Accumulated amortization | 6,374 | 5,192
Net carrying amount | 9,458 | 10,436
Customer Relationships |  |
Intangibles Other Than Goodwill [Line Items] |  |
Gross carrying amount | 8,180 | 8,114
Less: Accumulated amortization | 2,379 | 1,818
Net carrying amount | 5,801 | 6,296
Intellectual Property |  |
Intangibles Other Than Goodwill [Line Items] |  |
Gross carrying amount | 6,069 | 6,017
Less: Accumulated amortization | 2,658 | 2,116
Net carrying amount | 3,411 | 3,901
Capitalized Software |  |
Intangibles Other Than Goodwill [Line Items] |  |
Gross carrying amount | 1,583 | 1,497
Less: Accumulated amortization | 1,337 | 1,258
Net carrying amount | $ 246 | $ 239

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