Goodwill and Other Intangibles - Summary of Other Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,649	$ 1,614
Accumulated amortization	(1,041)	(929)
Net carrying amount	608	685
Intangible Assets, Net [Abstract]
Gross carrying amount	1,927	1,892
Net carrying amount	886	963
Trademarks and Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	97	95
Accumulated amortization	(43)	(37)
Net carrying amount	54	58
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived intangible assets	278	278
Intellectual Property [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	731	718
Accumulated amortization	(581)	(523)
Net carrying amount	150	195
Customer and Supplier Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	821	801
Accumulated amortization	(417)	(369)
Net carrying amount	$ 404	$ 432