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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	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