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Balance Sheet Details - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Accounts Receivable, Allowance for Credit Loss      
Balance at beginning of year $ 46 $ 31 $ 39
Provision for credit losses 11 29 9
Write offs, net of recoveries (34) (14) (17)
Balance at end of year $ 23 $ 46 $ 31