EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended	12 Months Ended
	Aug. 13, 2024	Aug. 02, 2024	Jun. 06, 2024	May 31, 2023	Aug. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Pre-tax cash proceeds from divestiture of business						$ 0	$ 0	$ 17
Interest income						148	227	34
Loss on Copeland note receivable						279	0	0
Loss on Copeland note receivable, after-tax						$ 217
Loss from equity method investment (in dollars per share)						$ 0.38
Related Party
Schedule of Equity Method Investments [Line Items]
Proceeds from related party note receivable						$ 0	918	0
Payment of related party note payable						0	918	$ 0
Copeland
Schedule of Equity Method Investments [Line Items]
Equity method investment				$ 1,359
Notes receivable				$ 2,052
Proceeds from related party note receivable							918
Payment of related party note payable							918
Copeland | Related Party
Schedule of Equity Method Investments [Line Items]
Interest income						$ 86	$ 41
Copeland
Schedule of Equity Method Investments [Line Items]
Noncontrolling common equity interest			40.00%	40.00%		40.00%	40.00%
Copeland
Schedule of Equity Method Investments [Line Items]
Pre-tax cash proceeds from divestiture of business				$ 9,700		$ 1,500
Notes receivable, consideration				$ 2,250		$ 1,900
Proceeds from sale of equity method investments	$ 1,500		$ 1,500		$ 1,500
Proceeds from sale of notes receivable		$ 1,900	$ 1,900