CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (111,635)	$ (123,640)	$ (646,548)	$ (676,078)
Other comprehensive loss, net of tax:
Change in unrealized loss on available-for-sale securities, net of tax	(3,711)	(465)	(6,138)	(1,938)
Comprehensive loss	$ (115,346)	$ (124,105)	$ (652,686)	$ (678,016)