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FINANCIAL INSTRUMENTS - Schedule Of Derivative Instruments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Total gains included in earnings | $ (2) | $ 20 | $ (69)
Total gains included in other comprehensive income | $ (149) | $ (76) | $ (80)
Derivative Gain Loss Statement Of Income Or Comprehensive Income, Extensible Enumeration Not Disclosed, Flag | Total | Total | Total
Commodity | Cash Flow Hedging | Cost of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) included in earnings | $ 0 | $ 0 | $ (19)
Gains (losses) included in other comprehensive income | 0 | 0 | 6
Foreign currency | Cash Flow Hedging | Cost of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) included in earnings | 1 | 10 | 65
Gains (losses) included in other comprehensive income | 25 | (8) | 42
Foreign currency | Cash Flow Hedging | Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) included in earnings | 5 | 0 | (3)
Gains (losses) included in other comprehensive income | 7 | 2 | 0
Foreign currency | Cash Flow Hedging | Other deductions, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gains (losses) included in earnings | (8) | 10 | (128)
Foreign currency | Net Investment Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment hedges included in earnings | 0 | 0 | 16
Net investment hedges included in other comprehensive income | $ (181) | $ (70) | $ (128)

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