Stockholders' Equity - Share-Based Awards Available for Grant (Details) shares in Thousands	9 Months Ended
	Apr. 30, 2020 shares
Shares Available for Grant
Shares available for grant, beginning balance (in shares)	21,058
Restricted stock units granted (in shares)	(1,517)
Options granted (in shares)	0
Share-based awards canceled/forfeited/expired (in shares)	2,431
Shares available for grant, ending balance (in shares)	21,972
Pool shares reduced for each share granted (in shares)	2.3
Pool shares increased for each share forfeited (in shares)	2.3