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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Taxes [Line Items]

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Taxes - Narrative (Details) - USD ($) $ in Millions	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Taxes [Line Items]
Operating loss and capital loss carryforwards	$ 32,400
Valuation allowances	7,405	$ 7,485
Unrecognized tax benefits	3,757	3,540	$ 3,307	$ 3,245
Unrecognized tax benefits that would impact effective tax rate	2,000	$ 1,700
Operating loss and capital loss carryforward expiring by 2044
Taxes [Line Items]
Operating loss and capital loss carryforwards	$ 18,500