Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Intangible Assets [Line Items]
Gross carrying amount, total intangible assets	$ 7,723	$ 7,090
Net, Total Intangible Assets	5,549	5,356
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	5,311	4,762
Accumulated Amortization	(2,174)	(1,734)
Net, Total Amortized Intangible Assets	3,137	3,028
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,412	2,328
Patented Technology
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	1,464	1,332
Accumulated Amortization	(629)	(497)
Net, Total Amortized Intangible Assets	835	835
Customer Relationships
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	3,097	2,773
Accumulated Amortization	(1,191)	(969)
Net, Total Amortized Intangible Assets	1,906	1,804
Miscellaneous
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	750	657
Accumulated Amortization	(354)	(268)
Net, Total Amortized Intangible Assets	396	389
Trademarks
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,332	2,248
Miscellaneous
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	$ 80	$ 80