Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 757	$ 785
Accumulated Amortization	(253)	(230)
Net	504	555
Patented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	86	86
Accumulated Amortization	(24)	(19)
Net	62	67
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	627	649
Accumulated Amortization	(201)	(178)
Net	426	471
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18	26
Accumulated Amortization	(16)	(21)
Net	2	5
Miscellaneous
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26	24
Accumulated Amortization	(12)	(12)
Net	$ 14	$ 12