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

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Taxes [Line Items]

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Taxes - Narrative (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Taxes [Line Items]
Operating loss and capital loss carryforwards	$ 19,600
Valuation allowances	4,421	$ 7,405
Unrecognized tax benefits	2,440	3,757	$ 3,540	$ 3,307
Unrecognized tax benefits that would impact effective tax rate	2,000	$ 2,000
Operating loss and capital loss carryforward expiring by 2046
Taxes [Line Items]
Operating loss and capital loss carryforwards	$ 13,100