Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021
Intangible Assets [Line Items]
Gross carrying amount, total intangible assets	$ 7,033	$ 7,723
Total Intangible Assets, Net	4,764	5,549
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	4,910	5,311
Accumulated Amortization	(2,269)	(2,174)
Total Definite-Lived Intangible Assets, Net	2,641	3,137
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,123	2,412
Technology
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	1,376	1,464
Accumulated Amortization	(640)	(629)
Total Definite-Lived Intangible Assets, Net	736	835
Customer Relationships
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	2,810	3,097
Accumulated Amortization	(1,258)	(1,191)
Total Definite-Lived Intangible Assets, Net	1,552	1,906
Miscellaneous
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	724	750
Accumulated Amortization	(371)	(354)
Total Definite-Lived Intangible Assets, Net	353	396
Trademarks/trade names
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,123	2,332
Miscellaneous
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	$ 0	$ 80