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FINANCIAL INSTRUMENTS - Schedule Of Derivative Instruments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to Earnings | $ 20 | $ (69) | $ 89
Gain (Loss) to OCI | $ (76) | $ (80) | $ 290
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] |  |  |
Gain (Loss) to Earnings | $ 0 | $ (19) | $ 12
Commodity | Cash Flow Hedging | Cost of sales | Other Comprehensive Income (Loss) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to OCI | 0 | 6 | (20)
Commodity | Cash Flow Hedging | Other deductions, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to Earnings | 10 | (128) | 48
Foreign currency | Cash Flow Hedging | Cost of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to Earnings | 10 | 65 | 31
Foreign currency | Cash Flow Hedging | Cost of sales | Other Comprehensive Income (Loss) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to OCI | (8) | 42 | 53
Foreign currency | Cash Flow Hedging | Sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to Earnings | 0 | (3) | (2)
Foreign currency | Cash Flow Hedging | Sales | Other Comprehensive Income (Loss) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to OCI | 2 | 0 | (9)
Foreign currency | Net Investment Hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to Earnings | 0 | 16 |
Foreign currency | Net Investment Hedging | Other Comprehensive Income (Loss) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) to OCI | $ (70) | $ (128) | $ 266

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