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STOCKHOLDERS’ EQUITY (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Oct. 31, 2020
USD ($)
class
vote
$ / shares
shares
Oct. 31, 2019
USD ($)
Aug. 31, 2020
USD ($)
Jul. 31, 2020
$ / shares
shares
Class of Stock [Line Items]        
Common stock, number of classes of stock | class 2      
Common stock, shares authorized (in shares) 1,200,000,000     1,200,000,000
Common stock, par value (in dollars per share) | $ / shares $ 0.000025     $ 0.000025
Common stock, shares issued (in shares) 201,346,000     201,949,000
Common stock, shares outstanding (in shares) 201,346,000     201,949,000
Payments for repurchase of common stock | $ $ 125,079 $ 0    
Repurchase and retirement of common stock (in shares) 5,200,000      
Common Class A        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 1,000,000,000     1,000,000,000
Common stock, shares issued (in shares) 189,883,000     186,846,000
Common stock, shares outstanding (in shares) 189,883,000     186,846,000
Common stock number of votes per share | vote 1      
Stock repurchase program, authorized amount | $     $ 125,000  
Payments for repurchase of common stock | $ $ 125,000      
Stock repurchase price (in dollars per share) | $ / shares $ 24.15      
Common Class B        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 200,000,000     200,000,000
Common stock, shares issued (in shares) 11,463,000     15,103,000
Common stock, shares outstanding (in shares) 11,463,000     15,103,000
Common stock number of votes per share | vote 10