v3.26.1
Short-Term Investments - Schedule of Fair Values and Gross Unrealized Loss Position of Available-for-Sale Securities Aggregated by Investment Category (Details) - USD ($)
$ in Thousands
Jul. 31, 2026
Jan. 31, 2026
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value $ 4,261,184 $ 677,866
12 months or less, Gross unrealized losses (46,274) (1,477)
Greater than 12 months, Fair value 8,414 9,139
Greater than 12 months, Gross unrealized losses (54) (59)
Certificates of deposit    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 27,685 27,690
12 months or less, Gross unrealized losses (25) (20)
Greater than 12 months, Fair value 0 0
Greater than 12 months, Gross unrealized losses 0 0
Asset-backed securities    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 5 4,091
12 months or less, Gross unrealized losses 0 (80)
Greater than 12 months, Fair value 359 1,090
Greater than 12 months, Gross unrealized losses (50) (51)
Commercial paper    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value   9,960
12 months or less, Gross unrealized losses   (1)
Greater than 12 months, Fair value   0
Greater than 12 months, Gross unrealized losses   0
Corporate notes and bonds    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 2,494,400 425,464
12 months or less, Gross unrealized losses (27,453) (950)
Greater than 12 months, Fair value 0 0
Greater than 12 months, Gross unrealized losses 0 0
Foreign government bonds    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 159,422 69,877
12 months or less, Gross unrealized losses (1,317) (68)
Greater than 12 months, Fair value 8,055 8,049
Greater than 12 months, Gross unrealized losses (4) (8)
Municipal securities    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 26,599 580
12 months or less, Gross unrealized losses (227) 0
Greater than 12 months, Fair value 0 0
Greater than 12 months, Gross unrealized losses 0 0
U.S. treasury securities    
Debt Securities, Available-for-Sale [Line Items]    
12 months or less, Fair value 1,553,073 140,204
12 months or less, Gross unrealized losses (17,252) (358)
Greater than 12 months, Fair value 0 0
Greater than 12 months, Gross unrealized losses $ 0 $ 0