Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands	Apr. 30, 2025	Jul. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	$ 816,237
12 Months or Greater	323,305
Total	1,139,542	$ 980,498
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	139,574
12 Months or Greater	0
Total	139,574	138,598
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	205,384
12 Months or Greater	200,742
Total	406,126	246,274
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	64,660
12 Months or Greater	0
Total	64,660	46,900
U.S. Government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	54,224
12 Months or Greater	30,445
Total	84,669	89,883
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	334,743
12 Months or Greater	0
Total	334,743	360,881
U.S. Government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	5,332
12 Months or Greater	39,036
Total	44,368	33,499
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	12,320
12 Months or Greater	51,241
Total	63,561	58,867
Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less Than 12 Months	0
12 Months or Greater	1,841
Total	$ 1,841	$ 5,596