Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended
Feb. 02, 2020	Feb. 03, 2019
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 545	$ 465
Unrecognized compensation cost related to unvested stock-based awards	$ 5,454
Unrecognized compensation cost, Remaining weighted-average service period	3 years 10 months 24 days
Cost of products sold
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 31	26
Cost of subscriptions and services
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	12	8
Research and development
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	391	311
Selling, general and administrative
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 111	$ 120

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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