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Supplementary Financial Information - Other Current Assets (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplier and other receivables	$ 1,960	$ 2,092
Prepaid and other current assets	1,289	1,104
Value-added taxes receivable	914	970
Available-for-sale investments	12	274
Other current assets	$ 4,175	$ 4,440

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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