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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Jan. 26, 2025	Jan. 28, 2024	Jan. 29, 2023
Income Tax Contingency [Line Items]
Deferred tax assets	$ 13,214	$ 8,060
Deferred tax liabilities	1,511	891
Undistributed earnings of foreign subsidiaries	1,400
Valuation allowance	1,600	1,600
Unrecognized tax benefits that would affect effective tax rate	2,000
Interest and taxes recognized related to unrecognized tax benefits	92	42	$ 33
Interest and penalties accrued	251	140
Capital Loss Carryforward
Income Tax Contingency [Line Items]
Valuation allowance	1,600
Other long-term liabilities
Income Tax Contingency [Line Items]
Deferred tax liabilities	886	462
Deferred tax assets, noncurrent
Income Tax Contingency [Line Items]
Deferred tax assets	11,000	$ 6,100
Federal
Income Tax Contingency [Line Items]
Net operating loss carryforwards	479
Research tax credit carryforwards	46
Federal \| Capital Loss Carryforward
Income Tax Contingency [Line Items]
Federal capital loss carryforwards	1,300
Foreign Country
Income Tax Contingency [Line Items]
Net operating loss carryforwards	349
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards	332
Research tax credit carryforwards	1,500
California
Income Tax Contingency [Line Items]
Research tax credit carryforwards	1,400
Other states
Income Tax Contingency [Line Items]
Research tax credit carryforwards	$ 98