New Accounting Standards (Details) - USD ($) $ in Millions	Jun. 30, 2025	Sep. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounts payable included in supply chain financing programs	$ 844	$ 703

Amount of obligation for supplier finance program.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant