Derivative Financial Instruments - Additional Information (Details) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2024 |
|
| Derivatives, Fair Value [Line Items] | |||
| Outstanding hedge contracts | $ 0 | ||
| Foreign Exchange Contract | Other Income (Expense) | |||
| Derivatives, Fair Value [Line Items] | |||
| Realized foreign exchange forward contract gain (loss) | $ 3,000,000 | $ 0 | |
| Unrealized foreign exchange forward contract gain (loss) | 12,000,000 | $ (6,000,000) | |
| Sale | |||
| Derivatives, Fair Value [Line Items] | |||
| Outstanding hedge contracts | 438,000,000 | ||
| Purchase | |||
| Derivatives, Fair Value [Line Items] | |||
| Outstanding hedge contracts | $ 260,000,000 | ||