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Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	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

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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