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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, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | $ 9 | $ (8) | $ (72) | $ 94
Foreign currency exchange derivatives | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | (6) | (3) | (8) | 7
Foreign currency exchange derivatives | Net financing charges |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | 15 | 1 | (64) | 88
Equity swap |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) recognized in income on derivative | 0 | (6) | 0 | (1)
Cash Flow Hedging |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | 17 | 16 | 0 | 27
Amount of gain (loss) reclassified from AOCI into income | (7) | 5 | (4) | 5
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 | 9 | 10 | (12) | 23
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 | (5) | 6 | 4 | 11
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 | 5 | 0 | 5 | 0
Cash Flow Hedging | Interest rate swaps | Net financing charges |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) reclassified from AOCI into income | 0 | 0 | 0 | (1)
Cash Flow Hedging | Commodity derivatives |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax | 3 | 6 | 7 | 4
Cash Flow Hedging | Commodity derivatives | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) reclassified from AOCI into income | $ (2) | $ (1) | $ (8) | $ (5)

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