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Goodwill and Other Intangibles - Summary of Intangible Assets (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Sep. 30, 2021
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Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 1,682 | $ 1,700
Accumulated amortization | (919) | (879)
Net carrying amount | 763 | 821
Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 1,960 | 1,978
Net carrying amount | 1,041 | 1,099
Trademarks and Trade Names [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 99 | 101
Accumulated amortization | (35) | (32)
Net carrying amount | 64 | 69
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] |  |
Indefinite-lived intangible assets | 278 | 278
Intellectual Property [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 744 | 750
Accumulated amortization | (516) | (495)
Net carrying amount | 228 | 255
Customer and Supplier Relationships [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 839 | 849
Accumulated amortization | (368) | (352)
Net carrying amount | $ 471 | $ 497

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