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BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Oct. 05, 2011
USD ($)
Dec. 31, 2017
ARS ($)
Dec. 31, 2016
ARS ($)
Dec. 31, 2015
ARS ($)
Dec. 31, 2017
USD ($)
Aug. 08, 2017
ARS ($)
Technical, financial and operational assistance agreement [abstract]            
Compensation for key management member   $ 52,643 $ 39,409      
Balances and transactions with related parties [abstract]            
Accounts receivable   24,679 117,716      
Accounts payable   994,024 889,546      
Costs [Abstract]            
Gas purchase and others   182,560 277,603 $ 153,467    
Compensation for technical assistance   354,518 168,008 52,481    
Revenue for administrative services   1,489 122 122    
Financial Results [Abstract]            
Interest expenses   65,076 24,464      
Interest earned       11,348    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding   0 0 324,390    
Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   49,977 37,484 28,857    
Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   57,234 368,528 337,782    
Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   76,281 182,185 102,598    
Compania Mega S.A. [Member]            
Costs [Abstract]            
Gas purchase and others     0 [1] 0    
Compensation for technical assistance     0 [1] 0    
Revenue for administrative services     0 [1] 0    
Financial Results [Abstract]            
Interest expenses [1]     0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Compania Mega S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     1,641 [1] 1,176    
Compania Mega S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     82,590 [1] 63,591    
Compania Mega S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     17 [1] 30    
Petrobras Global Trading BV [Member]            
Costs [Abstract]            
Gas purchase and others       0    
Compensation for technical assistance       0    
Revenue for administrative services       0    
Financial Results [Abstract]            
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Petrobras Global Trading BV [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       0    
Petrobras Global Trading BV [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       44,058    
Petrobras Global Trading BV [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       0    
Braskem Netherlands B.V. [Member]            
Costs [Abstract]            
Gas purchase and others     0 [1] 0    
Compensation for technical assistance     0 [1] 0    
Revenue for administrative services     0 [1] 0    
Financial Results [Abstract]            
Interest expenses [1]     0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Braskem Netherlands B.V. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0 [1] 0    
Braskem Netherlands B.V. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     19,511 [1] 132,101    
Braskem Netherlands B.V. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0 [1] 0    
Petroleo Brasileiro [Member]            
Costs [Abstract]            
Gas purchase and others     0 [1] 0    
Compensation for technical assistance     0 [1] 0    
Revenue for administrative services     0 [1] 0    
Financial Results [Abstract]            
Interest expenses [1]     0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Petroleo Brasileiro [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0 [1] 0    
Petroleo Brasileiro [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     265,236 [1] 95,618    
Petroleo Brasileiro [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0 [1] 0    
Petrolera Pampa S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   0 0      
Accounts payable   0 2,634      
Costs [Abstract]            
Gas purchase and others   24,850 165,771 41,332    
Compensation for technical assistance   0 0 0    
Revenue for administrative services   0 0 0    
Financial Results [Abstract]            
Interest expenses   0 0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Petrolera Pampa S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
Petrolera Pampa S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
Petrolera Pampa S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
Refinor S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   0 0      
Accounts payable   3,534 0      
Costs [Abstract]            
Gas purchase and others   3,534        
Compensation for technical assistance   0        
Revenue for administrative services   0        
Financial Results [Abstract]            
Interest expenses   0        
Refinor S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
Refinor S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
Refinor S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
Pampa Comercializadora S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   1,882 943      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   0 0      
Compensation for technical assistance   0 0      
Revenue for administrative services   0 0      
Financial Results [Abstract]            
Interest expenses   0 0      
Pampa Comercializadora S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   6,647 3,603      
Pampa Comercializadora S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Pampa Comercializadora S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Petrolera Entre Lomas S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   0 17      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   11,017 24,740      
Compensation for technical assistance   0 0      
Revenue for administrative services   0 0      
Financial Results [Abstract]            
Interest expenses   0 0      
Petrolera Entre Lomas S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Petrolera Entre Lomas S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Petrolera Entre Lomas S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 188      
WEB S.A. [Member]            
Costs [Abstract]            
Gas purchase and others     3,325      
Compensation for technical assistance     0      
Revenue for administrative services     0      
Financial Results [Abstract]            
Interest expenses     0      
WEB S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0      
WEB S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0      
WEB S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues     0      
Oleoductos del Valle S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   1,338 297      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   0 0      
Compensation for technical assistance   0 0      
Revenue for administrative services   0 0      
Financial Results [Abstract]            
Interest expenses   0 0      
Oleoductos del Valle S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   4,618 2,418      
Oleoductos del Valle S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Oleoductos del Valle S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   958 0      
Petrouruguay S.A. [Member]            
Costs [Abstract]            
Gas purchase and others [1]     0      
Compensation for technical assistance [1]     0      
Revenue for administrative services [1]     0      
Financial Results [Abstract]            
Interest expenses [1]     0      
Petrouruguay S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues [1]     551      
Petrouruguay S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues [1]     51      
Petrouruguay S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues [1]     0      
Central Termica Piedrabuena S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   5,189 1,224      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   0 0      
Compensation for technical assistance   0 0      
Revenue for administrative services   0 0      
Financial Results [Abstract]            
Interest expenses   0 0      
Central Termica Piedrabuena S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   11,031 7,618      
Central Termica Piedrabuena S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Central Termica Piedrabuena S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Central Temica Loma La Lata S.A. [Member]            
Costs [Abstract]            
Gas purchase and others   0        
Compensation for technical assistance   0        
Revenue for administrative services   0        
Financial Results [Abstract]            
Interest expenses   0        
Central Temica Loma La Lata S.A. [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
Central Temica Loma La Lata S.A. [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
Central Temica Loma La Lata S.A. [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   244        
Transener S.A. [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   30 727      
Accounts payable   0 0      
Experta ART [Member]            
Costs [Abstract]            
Gas purchase and others   7,326 2,346      
Compensation for technical assistance   0 0      
Revenue for administrative services   0 0      
Financial Results [Abstract]            
Interest expenses   0 0      
Experta ART [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Experta ART [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Experta ART [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0      
Link [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   520 425      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   0 0 0    
Compensation for technical assistance   0 0 0    
Revenue for administrative services   0 0 0    
Financial Results [Abstract]            
Interest expenses   0 0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Link [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
Link [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
Link [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   4,587 3,924 3,087    
EGS [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   0 0      
Accounts payable   460 602      
TGU [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   0 0      
Accounts payable   $ 2,968 2,529      
CTG [Member]            
Technical, financial and operational assistance agreement [abstract]            
Cash payments for acquisition           $ 100
Petrobras Argentina [Member]            
Costs [Abstract]            
Gas purchase and others       112,135    
Compensation for technical assistance       52,481    
Revenue for administrative services       0    
Financial Results [Abstract]            
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
Petrobras Argentina [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       27,681    
Petrobras Argentina [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       2,414    
Petrobras Argentina [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues       99,481    
Pampa Energia [Member]            
Technical, financial and operational assistance agreement [abstract]            
Technical assistance agreement term renewal   3 years        
Percentage of annual comprehensive profits for providing operation and maintenance services   7.00%        
Loan granted to related party $ 26.0          
Automatic renewal period of additional term   1 year        
Interest rate   6.80%     6.80%  
Balances and transactions with related parties [abstract]            
Accounts receivable   $ 15,681 114,039      
Accounts payable   987,062 [2] 883,781 [2]   $ 3.0  
Financial lease   891,365 848,181      
Costs [Abstract]            
Gas purchase and others   135,833 81,421 [3] 0    
Compensation for technical assistance   354,518 168,008 [3] 0    
Revenue for administrative services   0 0 [3] 0    
Financial Results [Abstract]            
Interest expenses   65,076 24,464 [3]      
Interest earned       11,348    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding [4]       324,390    
Pampa Energia [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   27,681 21,653 [3] 0    
Pampa Energia [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   57,234 1,140 [3] 0    
Pampa Energia [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   70,492 178,056 [3] 0    
UT [Member]            
Costs [Abstract]            
Gas purchase and others   0        
Compensation for technical assistance   0        
Revenue for administrative services   1,397        
Financial Results [Abstract]            
Interest expenses   0        
UT [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
UT [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
UT [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0        
CIESA [Member]            
Balances and transactions with related parties [abstract]            
Accounts receivable   39 44      
Accounts payable   0 0      
Costs [Abstract]            
Gas purchase and others   0 0 0    
Compensation for technical assistance   0 0 0    
Revenue for administrative services   92 122 122    
Financial Results [Abstract]            
Interest expenses   0 0      
Interest earned       0    
Other Operating Income [Abstract]            
Acquisition of the rights of the arbitration proceeding       0    
CIESA [Member] | Natural Gas Transportation [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
CIESA [Member] | Production and Commercialization of Liquids [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   0 0 0    
CIESA [Member] | Other Services [Member]            
Detail of Significant Transactions with Related Parties [abstract]            
Revenues   $ 0 $ 0 $ 0    
[1] As of July 27, 2016, those companies are not considered as related parties due to the acquisition of P etrobras Argentina shares by P ampa Energia as described in Note 1.
[2] Accounts payable includes Ps. 891,365 and Ps. 848,181 corresponding to the financial leasing recorded as "Loans" as of December 31, 2017 and 2016, respectively.
[3] Until July, 27, 2016 includes transactions with P etrobras Argentina S.A. From that date, as a consequence of the merger between P ampa Energia and P etrobras Argentina, includes transactions with both parties.
[4] See Note 17.a).