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Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2022
Aug. 01, 2021
Jul. 31, 2022
Aug. 01, 2021
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Unrecognized compensation cost related to unvested stock-based awards $ 2,993   $ 2,993  
Unrecognized compensation cost, Remaining weighted-average service period     2 years 10 months 24 days  
Stock-based compensation expense 373 $ 421 $ 1,146 $ 1,290
Cost of products sold        
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 15 18 49 59
Cost of subscriptions and services        
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 22 18 60 47
Research and development        
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense 259 285 788 920
Selling, general and administrative        
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 77 $ 100 $ 249 $ 264