Convertible Senior Notes - Schedule of Carrying Amount of the Liability and Equity (Details) - Convertible Senior Notes - USD ($) $ in Thousands	Jul. 31, 2022	Jun. 05, 2020
2023 Notes
Liability component:
Principal amount	$ 776,661	$ 776,700
Unamortized issuance costs	(1,850)
Net carrying amount	774,811
2025 Notes
Liability component:
Principal amount	862,500
Unamortized issuance costs	(4,129)
Net carrying amount	858,371
2026 Notes
Liability component:
Principal amount	1,000,000
Unamortized issuance costs	(14,333)
Net carrying amount	985,667
2027 Notes
Liability component:
Principal amount	1,265,000
Unamortized issuance costs	(13,699)
Net carrying amount	$ 1,251,301