ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	$ 27,509	$ 26,598
Purchase of noncontrolling interest	43	389	$ 233
Stockholders' equity, ending balance	20,298	27,509	26,598
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(868)	(1,253)	(1,485)
Stockholders' equity, ending balance	(821)	(868)	(1,253)
Foreign currency translation
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(616)	(1,012)	(1,265)
Other comprehensive income (loss), net of tax of $26, $17 and $42, respectively	48	356	158
Reclassification to gain and loss on sale and divestiture of business	0	23	95
Reclassification to gain on sale of equity interest	0	17	0
Stockholders' equity, ending balance	(565)	(616)	(1,012)
Other comprehensive income (loss), tax	42	17	26
Pension and postretirement
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(245)	(247)	(222)
Reclassification to gain and loss on sale and divestiture of business	0	0	22
Actuarial gains (losses) deferred during the period, net of taxes of $0, $(14) and $11, respectively	(36)	45	4
Amortization of deferred actuarial losses into earnings, net of tax of $17, $12 and $(4), respectively	12	(43)	(51)
Stockholders' equity, ending balance	(269)	(245)	(247)
Other comprehensive income (loss), tax	(4)	12	17
Actuarial gains (losses) deferred during the period, tax expense (benefit)	11	(14)	0
Cash flow hedges
Accumulated other comprehensive income [Roll Forward]
Stockholders' equity, beginning balance	(7)	6	2
Other comprehensive income (loss), net of tax of $26, $17 and $42, respectively	25	(5)	37
Reclassification to gain and loss on sale and divestiture of business	0	0	(19)
Reclassifications of realized (gains) losses to sales and cost of sales, net of tax of $4, $2 and $1, respectively	(5)	(8)	(14)
Stockholders' equity, ending balance	13	(7)	6
Other comprehensive income (loss), tax	(7)	1	(11)
Reclassification of (gains) losses to sales and cost of sales, tax	2	4	1
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated other comprehensive income [Roll Forward]
Purchase of noncontrolling interest	$ 3	$ 0	$ 0