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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 | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | $ 60 | $ 9 | $ 12 | $ (72)
Foreign currency exchange derivatives | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | 2 | (6) | (3) | (8)
Foreign currency exchange derivatives | Net financing charges |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | 59 | 15 | 16 | (64)
Foreign currency exchange derivatives | Selling, general and administrative |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | (1) | 0 | (1) | 0
Cash Flow Hedging |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | 29 | 17 | (18) | 0
Amount of gain (loss) reclassified from AOCI into income | (3) | (7) | (7) | (4)
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 | 15 | 9 | 2 | (12)
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 | (2) | (5) | (3) | 4
Cash Flow Hedging | Commodity derivatives |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | 0 | 3 | 1 | 7
Cash Flow Hedging | Commodity derivatives | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) reclassified from AOCI into income | (1) | (2) | (4) | (8)
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 | 14 | 5 | (21) | 5
Net Investment Hedging |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) related to net investment hedges recorded in other comprehensive income | $ 98 | $ (60) | $ (47) | $ (329)

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