Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 650	$ 670
Accumulated Amortization	(268)	(262)
Net	382	408
Patented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	79	79
Accumulated Amortization	(35)	(32)
Net	44	47
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	547	550
Accumulated Amortization	(221)	(201)
Net	326	349
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0	17
Accumulated Amortization	0	(17)
Net	0	0
Miscellaneous
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24	24
Accumulated Amortization	(12)	(12)
Net	$ 12	$ 12

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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