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
Apr. 30, 2026
Jan. 31, 2026
Cash and Cash Equivalents [Line Items]    
Total cash equivalents $ 534 $ 670
Total short-term investments 1,827 1,695
Total 2,361 2,365
U.S. government securities | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 1,626 1,459
Corporate debt securities (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 155 180
Certificates of deposit (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total short-term investments 46 56
Money market funds | Level 1    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents 505 654
Certificates of deposit (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents 19 0
U.S. government securities | Level 2    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents 0 16
Corporate debt securities (Level 2) | Level 2    
Cash and Cash Equivalents [Line Items]    
Total cash equivalents $ 10 $ 0