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Divestitures - Summary of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Divestitures [Abstract] |  |
Accounts receivable, net | $ 6 | $ 5
Inventories | 2 | 3
Net property, plant and equipment | 34 | 34
Goodwill | 14 | 14
Other assets | 5 | 3
Current assets held for sale | 61 | 59
Trade and other payables | 4 | 6
Accrued expenses and other liabilities | 1 | 1
Current liabilities held for sale | $ 5 | $ 7

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