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THE ENVIRONMENT (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
CLP ($)
THE ENVIRONMENT (unaudited)  
Environmental disbursements $ 2,184,723
Other Property, plant and equipment  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 236,917
Other Property, plant and equipment | Brazil  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 69,689
Other Property, plant and equipment | Paraguay  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 167,228
Other Property, plant and equipment | Future commitments  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 18,389
Other Property, plant and equipment | Future commitments | Paraguay  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 18,389
Recorded as expenses  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 1,947,806
Recorded as expenses | Chile  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 1,061,569
Recorded as expenses | Argentina  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 357,999
Recorded as expenses | Brazil  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 464,022
Recorded as expenses | Paraguay  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 64,216
Recorded as expenses | Future commitments  
THE ENVIRONMENT (unaudited)  
Environmental disbursements 7,061
Recorded as expenses | Future commitments | Paraguay  
THE ENVIRONMENT (unaudited)  
Environmental disbursements $ 7,061