Derivative and Hedging Instruments - Schedule of Derivative Instruments at Gross Value (Details) - USD ($) $ in Millions |
Sep. 30, 2023 |
Sep. 30, 2022 |
|---|---|---|
| Foreign exchange forward contracts | Designated as Hedging Instrument | Prepaid expenses and other current assets | ||
| Derivative [Line Items] | ||
| Assets | $ 100 | $ 718 |
| Foreign exchange forward contracts | Designated as Hedging Instrument | Accrued liabilities | ||
| Derivative [Line Items] | ||
| Liabilities | 66 | 49 |
| Foreign exchange forward contracts | Not Designated as Hedging Instrument | Prepaid expenses and other current assets | ||
| Derivative [Line Items] | ||
| Assets | 15 | 35 |
| Foreign exchange forward contracts | Not Designated as Hedging Instrument | Accrued liabilities | ||
| Derivative [Line Items] | ||
| Liabilities | 16 | 47 |
| Cross-currency swaps | Designated as Hedging Instrument | Other assets | ||
| Derivative [Line Items] | ||
| Assets | 178 | 378 |
| Interest rate swaps | Designated as Hedging Instrument | Other liabilities | ||
| Derivative [Line Items] | ||
| Liabilities | $ 314 | $ 322 |