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REVENUE (Details)
 12 Months Ended
Dec. 31, 2020
item
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Number of types of revenue arrangements 2
Host Customer Arrangements  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Period over the first years of the customer contract under which the incentives are in the form of annual performance- based payments 5 years
Estimated benefit period in revenue contract 10 years
Minimum | Host Customer Arrangements  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Term for contracts 5 years
Minimum | Partnership Arrangements  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Term for contracts 10 years
Maximum  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Term for contracts 10 years
Maximum | Partnership Arrangements  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]  
Term for contracts 20 years