CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (797,538)	$ (1,034,260)	$ (872,883)
Other comprehensive loss, net of tax:
Change in unrealized loss on available-for-sale securities, net of tax	(6,068)	(2,038)	1,361
Comprehensive loss	$ (803,606)	$ (1,036,298)	$ (871,522)