Income Taxes - Schedule of Unrecognized Tax Benefits Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits at the beginning of the fiscal year	$ 312	$ 261	$ 238
Increases for tax positions of prior years	20	31	23
Decreases for tax positions of prior years	(7)	0	(11)
Increases for tax positions related to the current year	21	29	13
Decreases relating to settlements with taxing authorities	0	(9)	0
Reductions as a result of lapse of the statute of limitations	(39)	0	(2)
Gross unrecognized tax benefits at the end of the fiscal year	$ 307	$ 312	$ 261

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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