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Balance Sheet Details - Summary of Accounts Receivable, Net (Details) - USD ($) $ in Millions	Jan. 31, 2020	Oct. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ 2,684	$ 2,782
Unbilled receivables	218	206
Allowance for doubtful accounts	(38)	(31)
Total	$ 2,864	$ 2,957

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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