ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	$ 27,509
Stockholders' equity, ending balance	26,379	$ 26,555
Accumulated other comprehensive income (loss)	(1,340)	(1,090)	$ (868)
Foreign currency translation, tax	16	13
Amortization of deferred actuarial losses, tax	(1)	2
Gains deferred during the period, tax	(3)	(2)
Reclassification of (gains) losses to sales and cost of sales, tax	0	0
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(868)	(1,253)
Stockholders' equity, ending balance	(1,340)	(1,090)
Foreign currency translation
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(616)	(1,012)
Other comprehensive income (loss), net of tax of $13 and $16, respectively	(485)	172
Stockholders' equity, ending balance	(1,101)	(840)
Pension and postretirement
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(245)	(247)
Amortization of deferred actuarial losses into earnings, net of tax of $2 and $(1), respectively	3	(12)
Stockholders' equity, ending balance	(242)	(259)
Cash flow hedges
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(7)	6
Gains deferred during the period, net of taxes of $(2) and $(3), respectively	11	6
Reclassification of realized (gains) losses to sales and cost of sales, net of tax of $— and $—, respectively	(1)	(3)
Stockholders' equity, ending balance	$ 3	$ 9