DISCONTINUED OPERATIONS - Narrative (Details) - USD ($) $ in Millions				1 Months Ended	3 Months Ended	12 Months Ended
	Jun. 06, 2024	May 31, 2023	Oct. 31, 2022	Aug. 31, 2024	Dec. 31, 2022	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales						$ 0	$ 0	$ 3,205
Income taxes paid related to gain on divestitures, subsidiary restructurings and transaction fees						$ 600		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	$ 0	3,156	$ 5,000
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
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