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Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Millions | 3 Months Ended
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Jan. 31, 2021 | Feb. 02, 2020
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense | $ 444 | $ 545
Unrecognized compensation cost related to unvested stock-based awards | $ 3,637 |
Unrecognized compensation cost, Remaining weighted-average service period | 3 years 3 months 18 days |
Cost of products sold |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense | $ 20 | 31
Cost of subscriptions and services |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense | 12 | 12
Research and development |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense | 328 | 391
Selling, general and administrative |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense | $ 84 | $ 111

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