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REVENUE, DEFERRED REVENUE AND DEFERRED COMMISSIONS - Deferred Revenue/Commissions (Details) - USD ($)
$ in Thousands
 3 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue, beginning balance $ 1,183,441  
Additions 180,044  
Revenue recognized 157,002  
Deferred revenue, ending balance 1,206,483  
Movement in Deferred Commissions [Roll Forward]    
Deferred commissions, beginning balance 215,528  
Additions 67,630  
Commissions recognized 39,400  
Deferred commissions, ending balance 243,758  
Revenue recognized, amount deferred in prior period 142,700 $ 109,000
Contracted revenue not recognized $ 1,247,200  
Percent expected to be recognized in next year 46.00%