Segment Information - Geographic Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Geographic Area Information [Line Items]
Net Sales	$ 25,299	$ 23,668	$ 22,317
Long-Lived Assets (Year-end)	3,042	3,228	3,059
United States
Geographic Area Information [Line Items]
Net Sales	12,864	11,577	11,371
Long-Lived Assets (Year-end)	1,573	1,638	1,713
Europe
Geographic Area Information [Line Items]
Net Sales	4,186	4,069	3,523
Long-Lived Assets (Year-end)	412	436	278
Asia Pacific
Geographic Area Information [Line Items]
Net Sales	5,791	5,748	5,285
Long-Lived Assets (Year-end)	656	727	667
Other Non-U.S.
Geographic Area Information [Line Items]
Net Sales	2,458	2,274	2,138
Long-Lived Assets (Year-end)	$ 401	$ 427	$ 401