Fair Value Measurements - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Jul. 31, 2022	Sep. 15, 2021	Jul. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability, Total			$ 698,200
2023 Convertible Senior Notes | Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unamortized discount	[1]	$ 0		$ 48,616
Unamortized debt issuance cost	[1]	$ 248		2,713
Closing trading price		$ 100
2026 Convertible Senior Notes | Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unamortized discount	[2]	$ 169,438		203,619
Unamortized debt issuance cost	[2]	19,359		23,264
Non Cash Interest Expense Converted To Principal		27,997		$ 8,906
2027 Convertible Senior Notes | Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unamortized debt issuance cost	[3]	$ 7,995
Closing trading price		$ 100

[1] Included in our consolidated balance sheets within convertible senior notes, net and amortized over the remaining life of the 2023 Notes using the effective interest rate method. As of July 31, 2021, the effective interest rate was 6.62%. As of July 31, 2022, the effective interest rate was 0.41%.

[2] Included in our consolidated balance sheets within convertible senior notes, net and amortized over the remaining life of the 2026 Notes using the effective interest rate method. The effective interest rate is 7.05%

[3] Included in our consolidated balance sheets within convertible senior notes, net and amortized over the remaining life of the 2027 Notes using the effective interest rate method. The effective interest rate is 0.52%.