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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jan. 29, 2023 | Jan. 31, 2021 | Jan. 26, 2020 | Jan. 30, 2022
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax assets, valuation allowance | $ 1,484 |  |  | $ 907
Unrecognized tax benefits that would affect effective tax rate | 770 |  |  |
Interest and taxes recognized related to unrecognized tax benefits | 33 | $ 14 | $ 7 |
Interest and penalties accrued | 95 |  |  | $ 59
Mellanox Technologies, Ltd | Israel |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Undistributed earnings of foreign subsidiaries | 1,050 |  |  |
Mellanox Technologies, Ltd | United Kingdom |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Undistributed earnings of foreign subsidiaries | 245 |  |  |
Federal |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Net operating loss carryforwards | 363 |  |  |
Research tax credit carryforwards | 26 |  |  |
Federal | Capital Loss Carryforward |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Federal capital loss carryforwards | 1,380 |  |  |
Foreign Country |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Net operating loss carryforwards | 329 |  |  |
State and Local Jurisdiction |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Net operating loss carryforwards | 329 |  |  |
Research tax credit carryforwards | 1,490 |  |  |
California |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Research tax credit carryforwards | 1,410 |  |  |
Other states |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Research tax credit carryforwards | $ 83 |  |  |

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