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Derivative Instruments and Hedging Activities - Location and Amount of Gains and Losses on Derivative Instruments and Related Hedge Items (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized in income on derivative | $ (48) | $ 81
Foreign currency exchange derivatives | Cost of sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized in income on derivative | (5) | 2
Foreign currency exchange derivatives | Net financing charges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized in income on derivative | (43) | 79
Cash Flow Hedging |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | (47) | (17)
Amount of gain (loss) reclassified from AOCI into income | (4) | 3
Cash Flow Hedging | Foreign currency exchange derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | (13) | (21)
Cash Flow Hedging | Foreign currency exchange derivatives | Cost of sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) reclassified from AOCI into income | (1) | 9
Cash Flow Hedging | Commodity derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | 1 | 4
Cash Flow Hedging | Commodity derivatives | Cost of sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) reclassified from AOCI into income | (3) | (6)
Cash Flow Hedging | Interest rate swaps |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | $ (35) | $ 0

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