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Goodwill and Other Intangibles - Summary of Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,526	$ 1,522
Accumulated amortization	(778)	(712)
Net carrying amount	748	810
Finite and Indefinite Intangible assets [Abstract]
Gross carrying amount	1,804	1,800
Net carrying amount	1,026	1,088
Trademarks and Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	66	66
Accumulated amortization	(31)	(29)
Net carrying amount	35	37
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	713	712
Accumulated amortization	(426)	(391)
Net carrying amount	287	321
Customer and Supplier Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	747	744
Accumulated amortization	(321)	(292)
Net carrying amount	$ 426	$ 452

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- Definition

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

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-Topic 350
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-Section 50
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