Cash Equivalents and Investments - Schedule of Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 670	$ 248
Short-term investments	1,695	2,114
Total	2,365	2,362
U.S. treasury securities \| Level 2
Cash and Cash Equivalents [Line Items]
Short-term investments	1,459	1,788
Corporate debt securities \| Level 2
Cash and Cash Equivalents [Line Items]
Short-term investments	180	281
Certificates of Deposit \| Level 2
Cash and Cash Equivalents [Line Items]
Short-term investments	56	45
Money market funds \| Level 1
Cash and Cash Equivalents [Line Items]
Cash equivalents	654	225
Certificates of Deposit \| Level 2
Cash and Cash Equivalents [Line Items]
Cash equivalents	0	23
U.S. treasury securities \| Level 2
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 16	$ 0

Fair value portion of asset recognized for present right to economic benefit.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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