INCOME TAXES - Schedule of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Deferred tax assets:
Net operating losses, capital losses and tax credits	$ 276	$ 283
Accrued liabilities	149	149
Postretirement and postemployment benefits	13	17
Employee compensation and benefits	122	121
Other	249	176
Total	809	746
Valuation allowances	(251)	(256)
Deferred tax liabilities:
Intangibles	(1,871)	(2,161)
Pensions	(195)	(193)
Property, plant and equipment	(149)	(121)
Undistributed non-U.S. earnings	(34)	(36)
Other	(51)	(53)
Total	(2,300)	(2,564)
Net deferred income tax liability	$ (1,742)	$ (2,074)