LOSS PER SHARE - Additional Information (Detail) - shares shares in Millions	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Redeemable preferred stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock equivalent shares excluded from the denominator in the calculation of diluted loss per share (in shares)	17.9	17.9
7.50% Convertible Senior Note
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock equivalent shares excluded from the denominator in the calculation of diluted loss per share (in shares)	6.3	6.3
7.50% Convertible Senior Note | Stock Options, Restricted Stock, and Redeemable Preferred Stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock equivalent shares excluded from the denominator in the calculation of diluted loss per share (in shares)	24.2	24.4