DEFERRED REVENUE - Remaining Performance Obligation, Expected Timing (Details) $ in Billions	Jul. 31, 2020 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation, amount	$ 37
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	62.00%
Deferred revenue recognition period	12 months