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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Feb. 02, 2020	Nov. 01, 2020
Income Tax Contingency [Line Items]
Provision for (benefit from) income taxes	$ 6	$ (76)
Unrecognized tax benefits	4,806		$ 4,748
Unrecognized tax benefits, Accrued interest and penalties	341		340
Unrecognized tax benefits, including accrued interest and penalties, that would impact effective tax rate	5,147		$ 5,088
Possible change of existing unrecognized tax benefits	$ 233

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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