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Balance Sheet Details - Schedule of Inventory (Details) - USD ($)
$ in Millions
Jan. 31, 2020
Oct. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finished goods $ 1,245 $ 1,198
Purchased parts and fabricated assemblies 1,315 1,189
Total $ 2,560 $ 2,387