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REVENUE - Performance Obligation (Details)
$ in Millions
Jul. 31, 2021
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 1,400.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Percentage of remaining performance obligation 85.00%
Period of remaining performance obligation 12 months