Income Taxes - Unrecognized Tax Benefits Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Unrecognized Tax Benefits [Roll Forward]
Gross amount of unrecognized tax benefits as of the beginning of the year	$ 49	$ 43	$ 37
Additions based on tax positions related to a prior year	4	0	1
Additions based on tax positions related to current year	12	7	7
Reductions based on tax positions taken in a prior year	0	(1)	(2)
Gross amount of unrecognized tax benefits as of the end of the year	$ 65	$ 49	$ 43

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
-Paragraph 217
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-217

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482525/740-10-45-10B

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- Definition

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

+ References

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- Definition

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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