REVENUES FROM CONTRACT WITH CUSTOMERS - Remaining Unsatisfied Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-08-01 $ in Millions	Jul. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract backlog amount	$ 694.1
Contract backlog (as percent)	31.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months