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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