Convertible Senior Notes - Narrative (Details) $ / shares in Units, $ in Thousands	Jul. 05, 2023 USD ($) trading_day	Jun. 25, 2020 USD ($) trading_day $ / shares	Jul. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)	Aug. 01, 2022 USD ($)	Jul. 31, 2022 USD ($)	Jul. 31, 2021 USD ($)
Debt Instrument [Line Items]
Proceeds from debt issuance		$ 1,130,500
Threshold trading days | trading_day	20	20
Threshold consecutive trading days | trading_day	30	30
Threshold percentage of share price that triggers conversion	130.00%	130.00%
Number of trading days | trading_day		5
Number of consecutive trading days | trading_day		5
Percentage of closing price (less than)		98.00%
Redemption price, percentage of principal	100.00%	100.00%
Minimum principal amount outstanding not subject to partial redemption	$ 100,000
Effective interest rate		5.75%
Carrying amount of equity component		$ 278,500
Unamortized debt issuance costs		19,500	$ 3,614	$ 7,528
Equity issuance costs		4,700
Net carrying amount of equity component		273,400
Deferred tax impact		$ 400
Principal amount			1,149,954	1,149,993
Cumulative effect adjustment			(1,274,102)	(725,112)		$ (573,300)	$ (528,895)
Fair value of notes			1,465,500	1,411,400
Initial strike price (in dollars per share) | $ / shares		$ 150.80
Initial cap price (in dollars per share) | $ / shares		$ 246.76
Net cost of capped call		$ 145,200
Additional Paid-In Capital
Debt Instrument [Line Items]
Cumulative effect adjustment			(2,426,819)	(1,816,915)		(1,590,885)	(1,131,006)
Accumulated Deficit
Debt Instrument [Line Items]
Cumulative effect adjustment			$ 1,148,080	$ 1,090,374		991,878	$ 601,600
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Principal amount					$ 169,900
Cumulative effect adjustment						169,899
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-In Capital
Debt Instrument [Line Items]
Cumulative effect adjustment					273,700	273,738
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
Debt Instrument [Line Items]
Cumulative effect adjustment					$ (103,800)	$ (103,839)
Long-term Debt
Debt Instrument [Line Items]
Unamortized debt issuance costs		14,800
Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Principal amount		$ 1,150,000
Interest rate		0.125%
Effective interest rate		6.03%
Convertible Senior Notes, $150 million
Debt Instrument [Line Items]
Principal amount		$ 150,000