Goodwill and Other Intangibles - Summary of Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,647	$ 1,700
Accumulated amortization	(924)	(879)
Net carrying amount	723	821
Intangible Assets, Net [Abstract]
Gross carrying amount	1,925	1,978
Net carrying amount	1,001	1,099
Trademarks and Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	97	101
Accumulated amortization	(36)	(32)
Net carrying amount	61	69
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	730	750
Accumulated amortization	(519)	(495)
Net carrying amount	211	255
Customer and Supplier Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	820	849
Accumulated amortization	(369)	(352)
Net carrying amount	$ 451	$ 497