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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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