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Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018
Intangible Assets [Line Items] |  |
Document Period End Date | Sep. 30, 2019 |
Future amortization expense, 2017 | $ 390 |
Gross carrying amount, total intangible assets | 6,985 | $ 7,222
Net, Total Intangible Assets | 5,632 | 6,187
Finite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 4,613 | 4,716
Accumulated Amortization | (1,353) | (1,035)
Net, Total Amortized Intangible Assets | 3,260 | 3,681
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | 2,372 | 2,506
Patented Technology |  |
Finite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 1,307 | 1,317
Accumulated Amortization | (370) | (251)
Net, Total Amortized Intangible Assets | 937 | 1,066
Customer Relationships |  |
Finite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 2,722 | 2,941
Accumulated Amortization | (759) | (599)
Net, Total Amortized Intangible Assets | 1,963 | 2,342
Miscellaneous |  |
Finite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 584 | 458
Accumulated Amortization | (224) | (185)
Net, Total Amortized Intangible Assets | 360 | 273
Trademarks |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | 2,282 | 2,386
Miscellaneous |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | $ 90 | $ 120

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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://fasb.org/us-gaap/role/ref/legacyRef -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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