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REVENUE RECOGNITION AND RECEIVABLES - Remaining Performance Obligations - (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Revenue Recognition    
Transaction price allocated to unsatisfied performance obligations   $ 299.0
Percentage of performance obligations to be satisfied 60.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01    
Revenue Recognition    
Transaction price allocated to unsatisfied performance obligations $ 249.0  
Period to satisfy the remaining performance obligations and recognize the transaction price 24 months  
Right to invoice and wholly unsatisfied performance obligation practical expedients true