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RESTRUCTURING, DIVESTITURES, AND IMPAIRMENTS - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Apr. 06, 2020
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 0 $ 0  
Customer lists      
Restructuring Cost and Reserve [Line Items]      
Impairment charges   4,000,000.0  
Domestic Environmental Solutions      
Restructuring Cost and Reserve [Line Items]      
Sale price for transaction     $ 462,500,000
Recognized impairment charge   58,300,000  
Estimated deal costs   $ 10,800,000