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Balance Sheet Details - Schedule of Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Balance Sheet Related Disclosures [Abstract]        
Cash and cash equivalents $ 3,996 $ 4,233    
Restricted cash 336 388    
Total $ 4,332 $ 4,621 $ 4,076 $ 5,084