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REVENUE, DEFERRED REVENUE AND DEFERRED COMMISSIONS - Deferred Revenue/Commissions (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Apr. 30, 2020
Jan. 31, 2020
Oct. 31, 2019
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2019
Movement in Deferred Revenue [Roll Forward]            
Deferred revenue, beginning balance $ 1,056,584 $ 975,274 $ 910,044   $ 910,044  
Additions 202,993 214,530 187,554      
Revenue recognized (137,517) (133,220) (122,324)      
Deferred revenue, ending balance 1,122,060 1,056,584 975,274   1,122,060  
Movement in Deferred Commissions [Roll Forward]            
Deferred commissions, beginning balance 189,134 172,025 153,712   153,712  
Additions 54,214 62,790 57,846      
Commissions recognized (42,573) (45,681) (39,533)      
Deferred commissions, ending balance 200,775 $ 189,134 $ 172,025   200,775  
Revenue recognized, amount deferred in prior period 125,100     $ 89,800 293,400 $ 216,300
Contracted revenue not recognized $ 1,133,600       $ 1,133,600  
Percent expected to be recognized in next year 45.00%       45.00%