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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
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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