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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Sep. 30, 2021
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 790 | $ 785
Accumulated Amortization | (241) | (230)
Net | 549 | 555
Patented technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 86 | 86
Accumulated Amortization | (20) | (19)
Net | 66 | 67
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 655 | 649
Accumulated Amortization | (188) | (178)
Net | 467 | 471
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 25 | 26
Accumulated Amortization | (21) | (21)
Net | 4 | 5
Miscellaneous |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 24 | 24
Accumulated Amortization | (12) | (12)
Net | $ 12 | $ 12

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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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