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LEGAL CLAIMS AND OTHER MATTERS (Details)
$ in Millions, $ in Millions
 12 Months Ended 24 Months Ended
Mar. 15, 2017
USD ($)
May 08, 2015
Contract
Oct. 09, 2008
Dec. 31, 2017
ARS ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
ARS ($)
Jun. 30, 2011
ARS ($)
Mar. 31, 2017
ARS ($)
LEGAL CLAIMS AND OTHER MATTERS [Abstract]                
Payment for claims to provincial agencies       $ 147.4   $ 27.6    
Provisions for contingency       $ 189.4   207.7    
Validity period of precautionary measure       6 months 6 months      
Accumulated impact on retained earnings due to obtaining injunction       $ 601.6        
Increase in tariff percentage     20.00%          
Receivables from income taxes and value added tax           69.4    
Claim amount for the omission as agent of withholding and collection of turnover tax             $ 4.9  
Canceled partial debt claim amount               $ 2.9
Number of natural gas contracts executed | Contract   3            
Claim amount due to lower allocation of products obtained         $ 163.0      
Adjusted of claim $ 306.3              
Nominal damages 134.0              
Interest on nominal damages $ 172.3              
Provision for other matters       $ 6.5   $ 6.5