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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Sep. 30, 2019
Intangible Assets [Line Items] |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 62 |
Gross carrying amount, total intangible assets | 6,912 | $ 6,985
Total Intangible Assets, Net | 5,391 | 5,632
Definite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 4,628 | 4,613
Accumulated Amortization | (1,521) | (1,353)
Total Definite-Lived Intangible Assets, Net | 3,107 | 3,260
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | 2,284 | 2,372
Technology |  |
Definite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 1,306 | 1,307
Accumulated Amortization | (427) | (370)
Total Definite-Lived Intangible Assets, Net | 879 | 937
Customer Relationships |  |
Definite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 2,704 | 2,722
Accumulated Amortization | (854) | (759)
Total Definite-Lived Intangible Assets, Net | 1,850 | 1,963
Miscellaneous |  |
Definite-Lived Intangible Assets, Gross [Abstract] |  |
Gross Carrying Amount | 618 | 584
Accumulated Amortization | (240) | (224)
Total Definite-Lived Intangible Assets, Net | 378 | 360
Trademarks/trade names |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | 2,205 | 2,282
Miscellaneous |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Carrying Amount, Gross and Net | $ 79 | $ 90

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