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Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions | Jul. 31, 2022 | Oct. 31, 2021
--- | --- | ---
Prepaid Expense and Other Assets, Current [Abstract] |  |
Prepaid expenses | $ 728 | $ 539
Other Assets, Miscellaneous, Current | 310 | 516
Total other current assets | $ 1,038 | $ 1,055

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