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Goodwill and Other Intangibles - Summary of Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 1,538 | $ 1,546
Accumulated amortization | (698) | (639)
Net carrying amount | 840 | 907
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Intangible Assets, Gross (Excluding Goodwill) | 1,816 | 1,824
Intangibles | 1,118 | 1,185
Trademarks and Trade Names [Member] |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Trademarks and trade names | 278 | 278
Trademarks and Trade Names [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 66 | 66
Accumulated amortization | (28) | (25)
Net carrying amount | 38 | 41
Intellectual Property [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 719 | 721
Accumulated amortization | (382) | (350)
Net carrying amount | 337 | 371
Customer and supplier relationships [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 753 | 759
Accumulated amortization | (288) | (264)
Net carrying amount | $ 465 | $ 495

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