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Acquisitions and Divestitures - Summary of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Sep. 30, 2021
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Business Combinations [Abstract] |  |
Accounts receivable, net |  | $ 26
Inventories |  | 27
Net property, plant and equipment | $ 4 | 80
Goodwill |  | 453
Operating lease assets, net |  | 10
Other assets |  | 1
Current assets held for sale | $ 4 | 597
Trade and other payables |  | 33
Accrued expenses and other liabilities |  | 7
Current operating lease obligations |  | 1
Operating lease obligations |  | 9
Current liabilities held for sale |  | $ 50

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