v3.26.1
Cash Equivalents and Investments - Schedule of Amortized Costs, Unrealized Gains and Losses and Estimated Fair Value of Cash Equivalents and Short-term Investments (Details) - USD ($)
$ in Millions
Jul. 31, 2026
Jan. 31, 2026
Cash and Cash Equivalents [Line Items]    
Total cash equivalents $ 530 $ 670
Total short-term investments 1,536 1,695
Total 2,066 2,365
U.S. government securities (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 1,399 1,459
Corporate debt securities (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 117 180
Certificates of deposit (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 20 56
Money market funds (Level 1) | Level 1    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents 530 654
U.S. government securities (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents $ 0 $ 16