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CONTINGENCIES - Additional Information (Details) - Capital cost
$ in Millions
9 Months Ended
Sep. 30, 2019
USD ($)
San German Ground Water Contamination Site, Initial Operable Unit  
Site Contingency [Line Items]  
Remedial alternative, EPA preferred remedy $ 7.3
San German Ground Water Contamination Site, Second Operable Unit  
Site Contingency [Line Items]  
Remedial alternative, EPA preferred remedy $ 17.3