Reduction of deferred tax asset included in unrecognized tax benefit

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The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, not expected to be settled within one year or a current operating cycle.

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No definition available.

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Unrecognized tax benefits related to state income tax positions

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No definition available.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Jan. 26, 2020	Jan. 27, 2019	Jan. 28, 2018	Jan. 29, 2017
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ 174	$ (245)	$ 149
Effective tax rate (as percent)	5.90%	(6.30%)	4.70%
Deferred tax assets, valuation allowance	$ 621	$ 562
Research tax credit carryforwards	814
Gross unrecognized tax benefits	583	477	$ 447	$ 224
Unrecognized tax benefits that would affect effective tax rate	464
Unrecognized tax benefit related to state tax positions	104
Unrecognized tax benefits, non-current	180
Reduction of deferred tax asset included in unrecognized tax benefit	284
Interest and penalties	31	$ 21	$ 15
Federal
Income Tax Contingency [Line Items]
Net operating loss carryforwards	70
Research tax credit carryforwards	314
Foreign Country
Income Tax Contingency [Line Items]
Net operating loss carryforwards	295
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards	153
California
Income Tax Contingency [Line Items]
Research tax credit carryforwards	774
Other states
Income Tax Contingency [Line Items]
Research tax credit carryforwards	$ 40