Fair Value Measurements - Non-recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - Convertible Debt - USD ($) $ in Thousands	Jan. 31, 2023	Jul. 31, 2022
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	$ 1,186,764	$ 1,301,661
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	1,474,249	1,302,492
2023 Convertible Senior Notes | Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	0	145,456
2023 Convertible Senior Notes | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	0	143,154
2026 Convertible Senior Notes | Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	618,995	589,200
2026 Convertible Senior Notes | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	973,154	759,086
2027 Convertible Senior Notes | Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	567,769	567,005
2027 Convertible Senior Notes | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior note, fair value disclosure	$ 501,095	$ 400,252