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EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Narrative (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 06, 2024 | May 31, 2023 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Interest income |  |  | $ 45 | $ 33 | $ 89 | $ 73
Copeland | Related Party |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Interest income |  |  |  | $ 31 |  | $ 62
Copeland |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent | 40.00% | 40.00% |  |  |  |
Copeland |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Proceeds from divestiture |  | $ 9,700 |  |  |  |
Notes receivable, consideration |  | $ 2,250 |  |  |  |
Proceeds from sale of equity method investments | $ 1,500 |  |  |  |  |
Proceeds from sale of notes receivable | $ 1,900 |  |  |  |  |

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