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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

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- 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 + Details
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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 No definition available. + Details
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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 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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