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BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2019
ARS ($)
Dec. 31, 2018
ARS ($)
Dec. 31, 2017
ARS ($)
Dec. 31, 2019
USD ($)
Technical, financial and operational assistance agreement [abstract]        
Compensation for key management member $ 142,116 $ 128,942 $ 79,094  
Balances and transactions with related parties [Abstract]        
Accounts receivable 302,801 535,508    
Accounts payable 2,499,041 2,855,908    
Costs [Abstract]        
Gas purchase and others 595,937 970,707 465,325  
Compensation for technical assistance 1,144,777 2,026,244 887,901  
Revenue for administrative services 146 225 3,491  
Financial Results [Abstract]        
Interest expenses 194,944 193,009 165,726  
Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 982,497 830,309 117,032  
Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 269,511 2,035 143,945  
Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 283,064 399,672 193,462  
Refinor S.A. [Member]        
Costs [Abstract]        
Gas purchase and others     8,230  
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  
Petrolera Pampa S.A. [Member]        
Costs [Abstract]        
Gas purchase and others     62,062  
Compensation for technical assistance     0  
Revenue for administrative services     0  
Financial Results [Abstract]        
Interest expenses     0  
Petrolera Pampa S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     0  
Petrolera Pampa S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     0  
Petrolera Pampa S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     0  
SACDE [Member]        
Technical, financial and operational assistance agreement [abstract]        
Amount received for services 1,726,356 263,580    
Balances and transactions with related parties [Abstract]        
Accounts receivable [1] 23,344 329,429    
Accounts payable [1] 0 0    
CT Barragan S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 8,131 0    
Accounts payable 0 0    
Petrolera Entre Lomas S.A. [Member]        
Costs [Abstract]        
Gas purchase and others   3,103 27,384  
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 0  
Pampa Comercializadora S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 43,843 10,942    
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 0  
Pampa Comercializadora S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 52,051 41,333 16,575  
Pampa Comercializadora S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Pampa Comercializadora S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Oleoductos del Valle S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 3,348 4,816    
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 0  
Oleoductos del Valle S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 5,469 9,459 11,476  
Oleoductos del Valle S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Oleoductos del Valle S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 12,733 2,616  
Central Piedra Buena S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 13,304 39,170    
Accounts payable 0 0    
Costs [Abstract]        
Gas purchase and others 0      
Compensation for technical assistance 0      
Revenue for administrative services 0      
Financial Results [Abstract]        
Interest expenses 0      
Central Piedra Buena S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 121,367      
Central Piedra Buena S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0      
Central Piedra Buena S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0      
Central Temica Loma La Lata S.A. [Member]        
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 Temica Loma La Lata S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   103,337 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 0  
Central Temica Loma La Lata S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   0 598  
Central Termica Piedrabuena 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 Termica Piedrabuena S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     20,245  
Central Termica Piedrabuena S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     0  
Central Termica Piedrabuena S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues     0  
Transener S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 140    
Accounts payable 0 0    
Costs [Abstract]        
Gas purchase and others   0    
Compensation for technical assistance   0    
Revenue for administrative services   0    
Financial Results [Abstract]        
Interest expenses   0    
Transener S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   0    
Transener S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   0    
Transener S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   18,481    
Experta ART [Member]        
Costs [Abstract]        
Gas purchase and others 20,080 18,321 18,381  
Compensation for technical assistance 0 0 0  
Revenue for administrative services 0 0 0  
Financial Results [Abstract]        
Interest expenses 0 0 0  
Experta ART [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Experta ART [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Experta ART [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0 0 0  
Link [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 668 9,971    
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 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 14,073 13,213 11,516  
EGS [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 0    
Accounts payable 0 0    
TGU [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 0    
Accounts payable 9,534 9,232    
Pampa Energia [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable [2] 210,126 141,040    
Accounts payable 2,489,507 [2] 2,846,676 [2]   $ 0.5
Financial lease 2,377,438 2,546,556    
Costs [Abstract]        
Gas purchase and others 575,857 949,283 349,268  
Compensation for technical assistance 1,144,777 2,026,244 887,901  
Revenue for administrative services 0 0 0  
Financial Results [Abstract]        
Interest expenses $ 194,944 193,009 165,726  
Pampa Energia [Member] | From 12/28/2019 to 12/27/2020 [Member]        
Technical, financial and operational assistance agreement [abstract]        
Percentage of annual comprehensive income before results and income taxes 6.50%      
Pampa Energia [Member] | From 12/28/2020 to 12/27/2021 [Member]        
Technical, financial and operational assistance agreement [abstract]        
Percentage of annual comprehensive income before results and income taxes 6.00%      
Pampa Energia [Member] | From 12/28/2021 to 12/27/2022 [Member]        
Technical, financial and operational assistance agreement [abstract]        
Percentage of annual comprehensive income before results and income taxes 5.50%      
Pampa Energia [Member] | From 12/28/2022 to 12/27/2023 [Member]        
Technical, financial and operational assistance agreement [abstract]        
Percentage of annual comprehensive income before results and income taxes 5.00%      
Pampa Energia [Member] | From 12/28/2023 to 12/27/2024 and onwards [Member]        
Technical, financial and operational assistance agreement [abstract]        
Percentage of annual comprehensive income before results and income taxes 4.50%      
Pampa Energia [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues $ 803,610 676,180 68,736  
Pampa Energia [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 269,511 2,035 143,945  
Pampa Energia [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 268,991 355,245 178,731  
UT [Member]        
Costs [Abstract]        
Gas purchase and others     0  
Compensation for technical assistance     0  
Revenue for administrative services     3,253  
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 37 0    
Accounts payable 0 0    
Costs [Abstract]        
Gas purchase and others 0 0 0  
Compensation for technical assistance 0 0 0  
Revenue for administrative services 146 225 238  
Financial Results [Abstract]        
Interest expenses 0 0 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] Corresponds to advance payments delivered to the supplier recorded as "Other credits".
[2] Accounts payable includes Ps. 2,377,438 and Ps. 2,546,556 corresponding to the financial leasing recorded as "Loans" as of December 31, 2019 and 2018, respectively.