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Supplementary Financial Information - Other Current Liabilities (Details) - USD ($)
$ in Millions
Jul. 31, 2020
Oct. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Sales and marketing programs $ 3,070 $ 3,361
Deferred revenue 1,190 1,178
Other accrued taxes 943 1,060
Employee compensation and benefit 961 1,103
Warranty 640 663
Operating lease liabilities 257  
Tax liability 170 237
Other 3,243 2,541
Other accrued liabilities $ 10,474 $ 10,143