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SEGMENT REPORTING - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Property, plant and equipment, net $ 2,193,318 $ 1,980,302  
Goodwill 1,287,736 1,246,878 $ 1,227,042
Permits and other intangibles, net 602,797 620,782  
Permits and other intangibles, net 1,890,533 1,867,660  
Environmental Services      
Segment Reporting Information [Line Items]      
Goodwill 1,112,013 1,071,846 1,085,534
Safety-Kleen Sustainability Solutions      
Segment Reporting Information [Line Items]      
Goodwill 175,723 175,032 $ 141,508
Operating segments | Environmental Services      
Segment Reporting Information [Line Items]      
Property, plant and equipment, net 1,651,026 1,467,641  
Goodwill 1,112,013 1,071,846  
Permits and other intangibles, net 454,919 462,050  
Permits and other intangibles, net 1,566,932 1,533,896  
Operating segments | Safety-Kleen Sustainability Solutions      
Segment Reporting Information [Line Items]      
Property, plant and equipment, net 411,415 398,660  
Goodwill 175,723 175,032  
Permits and other intangibles, net 147,878 158,732  
Permits and other intangibles, net 323,601 333,764  
Corporate, non-segment      
Segment Reporting Information [Line Items]      
Property, plant and equipment, net $ 130,877 $ 114,001