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Derivative Financial Instruments - Schedule of Amounts Recorded in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions | Jun. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Foreign exchange derivative contracts in asset | $ 6 |
Foreign exchange derivative contracts in liability | 7 |
Other Current Assets | Foreign Exchange Contract |  |
Derivatives, Fair Value [Line Items] |  |
Other assets | 1 | $ 0
Other Current Assets | Interest Rate Swap |  |
Derivatives, Fair Value [Line Items] |  |
Other assets | 7 | 2
Other Current Liabilities | Foreign Exchange Contract |  |
Derivatives, Fair Value [Line Items] |  |
Other liabilities | (2) | 0
Other Noncurrent Assets | Interest Rate Swap |  |
Derivatives, Fair Value [Line Items] |  |
Other assets | $ 0 | $ 16

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