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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 602	$ 593
Accumulated Amortization	(159)	(188)
Net	443	405
Patented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27	27
Accumulated Amortization	(19)	(17)
Net	8	10
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	424	494
Accumulated Amortization	(103)	(129)
Net	321	365
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	41	51
Accumulated Amortization	(27)	(32)
Net	14	19
Miscellaneous
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	110	21
Accumulated Amortization	(10)	(10)
Net	$ 100	$ 11

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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