FINANCIAL INSTRUMENTS - Schedule Of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Total gains included in earnings	$ 30	$ (9)	$ 0	$ (14)
Total gains included in other comprehensive income	(134)	20	(122)	(23)
Foreign currency
Derivative Instruments, Gain (Loss) [Line Items]
Net investment hedges included in earnings	0	0	0	0
Net investment hedges included in other comprehensive income	(134)	25	(138)	(27)
Foreign currency \| Sales
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) included in earnings	1	0	5	0
Gains (losses) included in other comprehensive income	(7)	5	5	7
Foreign currency \| Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) included in earnings	0	3	(1)	9
Gains (losses) included in other comprehensive income	7	(10)	11	(3)
Foreign currency \| Other deductions, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) included in earnings	$ 29	$ (12)	$ (4)	$ (23)

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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