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DISCONTINUED OPERATIONS - Narrative (Details) - USD ($) $ in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 13, 2024 | Jun. 06, 2024 | May 31, 2023 | Oct. 31, 2022 | Aug. 31, 2024 | Dec. 31, 2022 | Jun. 30, 2022 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Pre-tax cash proceeds from divestiture of business |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 17
Net sales |  |  |  |  |  |  |  | 0 | 3,205 | 5,824
Income taxes paid related to gain on divestitures, subsidiary restructurings and transaction fees |  |  |  |  |  |  |  |  | 2,300 |
Copeland |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Loss from equity method investment |  |  |  |  |  |  |  | $ 125 | $ 177 |
Climate Technologies |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Noncontrolling common equity interest |  |  | 40.00% |  |  |  |  |  |  |
Copeland |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Noncontrolling common equity interest |  | 40.00% | 40.00% |  |  |  |  | 40.00% | 40.00% |
Climate Technologies |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 14,000 |  |  |  |  |  |  |
Pre-tax cash proceeds from divestiture of business |  |  | 9,700 |  |  |  |  |  |  |
Face value of note received |  |  | $ 2,250 |  |  |  |  |  |  |
Interest accrual percentage on note payable |  |  | 5.00% |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  | $ 0 | $ 3,156 | 4,976
Disposal group, pre-tax earnings |  |  |  |  |  |  |  |  |  | 1,000
Pretax gain |  |  |  |  |  |  |  |  |  | 10,600
Disposal group, gain (loss) on disposal, net of tax |  |  |  |  |  |  |  |  |  | 8,400
Ceased depreciation |  |  |  |  |  |  |  |  | 96 |
Discontinued operations costs |  |  |  |  |  |  |  |  | 57 |
Less: discontinued operations |  |  |  |  |  |  |  |  | 2,200 |
Copeland |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Pre-tax cash proceeds from divestiture of business |  |  | $ 9,700 |  |  |  |  | 1,500 |  |
Pretax gain |  |  |  |  |  |  |  | 539 |  |
Disposal group, gain (loss) on disposal, net of tax |  |  |  |  |  |  |  | $ 435 |  |
Proceeds from sale of equity method investments | $ 1,500 | $ 1,500 |  |  | $ 1,500 |  |  |  |  |
Proceeds from sale of note receivable |  |  |  |  |  |  |  |  |  | 1,900
InSinkErator |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 3,000 |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 630
Disposal group, pre-tax earnings |  |  |  |  |  |  |  |  |  | $ 152
Pretax gain |  |  |  |  |  | $ 2,800 |  |  |  |
Disposal group, gain (loss) on disposal, net of tax |  |  |  |  |  | $ 2,100 |  |  |  |
Less: discontinued operations |  |  |  |  |  |  |  |  | $ 660 |
Therm-O-Disc |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Pretax gain |  |  |  |  |  |  | $ 486 |  |  |
Disposal group, gain (loss) on disposal, net of tax |  |  |  |  |  |  | $ 429 |  |  |

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