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Insurance Recoveries - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Business Interruption Loss [Line Items] |  |  |  |
Insurance loss proceeds |  |  | $ 5 |
Pepinster, Belgium [Member] |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |
Insurance proceeds |  |  | 14 |
Pepinster, Belgium [Member] | Flood [Member] |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |
Flood-related expenses |  | $ 1 |  | $ 7
Insurance gain proceeds | $ 0 |  | 9 |
Insurance loss proceeds | 4 |  |  |
Insurance proceeds | $ 8 |  |  |
Cash provided by investing activities |  |  | 12 |
Cash provided by operating activities |  |  | $ 2 |

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