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Supplemental Financial Information (Cash Equivalents) (Details) - Cash Equivalents - Fair Value, Inputs, Level 1 - USD ($)
$ in Millions
Jul. 31, 2022
Oct. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Time deposits $ 2,576 $ 4,668
Money-market funds $ 1,747 $ 1,607