Stockholders' Equity - Share-Based Awards Available for Grant (Details) shares in Thousands	3 Months Ended
	Oct. 31, 2020 shares
Shares Available for Grant
Shares available for grant, beginning balance (in shares)	18,047
Restricted stock units granted (in shares)	(363)
Options granted (in shares)	0
Share-based awards canceled/forfeited/expired (in shares)	1,592
Shares available for grant, ending balance (in shares)	19,276
Pool shares reduced for each share granted (in shares)	2.3
Pool shares increased for each share forfeited (in shares)	2.3