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Basis of Presentation - Additional Information (Detail) $ in Millions | Mar. 31, 2022 USD ($) | Sep. 30, 2021 USD ($)
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Financial Statement Details [Line Items] |  |
Number of Countries in which Entity Operates | 150 |
Interest percentage minimum for investments in partially-owned affiliates to be accounted for by the equity method | 20.00% |
Restricted Cash and Cash Equivalents | $ 33 | $ 6

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