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BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2020
ARS ($)
Dec. 31, 2019
ARS ($)
Dec. 31, 2018
ARS ($)
Dec. 31, 2020
USD ($)
Technical, financial and operational assistance agreement [abstract]        
Compensation for key management member $ 138,368 $ 193,478 $ 175,542  
Balances and transactions with related parties [Abstract]        
Accounts receivable 414,974 412,237    
Accounts payable 2,936,370 3,402,209    
Other receivables 84,236 0    
Costs [Abstract]        
Gas purchase and others 185,496 811,312 1,321,525  
Compensation for technical assistance 1,430,462 1,558,506 2,758,540  
Revenue for administrative services 140 199 306  
Financial Results [Abstract]        
Interest expenses 242,337 265,398 262,764  
Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 984,036 1,337,578 1,130,388  
Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 1,049,966 366,914 2,770  
Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 643,492 385,365 544,116  
SACDE [Member]        
Technical, financial and operational assistance agreement [abstract]        
Amount received for services 481,065 2,350,271    
Balances and transactions with related parties [Abstract]        
Accounts receivable [1] 0 31,781    
Accounts payable [1] 0 0    
CT Barragan S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 1,793 11,070    
Accounts payable 0 0    
Petrolera Entre Lomas S.A. [Member]        
Costs [Abstract]        
Gas purchase and others 0   4,224  
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 2,475   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 8,934   0  
Pampa Comercializadora S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 6,951 59,688    
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 112,774 70,863 56,271  
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 0 4,558    
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 25,768 7,446 12,878  
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 0 17,335  
Central Piedra Buena S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 18,114    
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 1,745      
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 Termica Piedrabuena 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 Termica Piedrabuena S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues   165,230 140,684  
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  
Transener S.A. [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 30 0    
Accounts payable 33 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  
Transener S.A. [Member] | Natural Gas Transportation [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0   0  
Transener S.A. [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 0   0  
Transener S.A. [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 352   25,160  
Experta ART [Member]        
Costs [Abstract]        
Gas purchase and others 25,429 27,337 24,942  
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 4,121 909    
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 19,562 19,159 17,988  
TGU [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 0    
Accounts payable 13,394 12,980    
Pampa Energia [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable [2] 402,079 286,067    
Accounts payable 2,922,943 [2] 3,389,229 [2]   $ 0.5
Other receivables 84,236      
Financial lease 2,892,682 3,236,657    
Costs [Abstract]        
Gas purchase and others 160,067 783,975 1,292,359  
Compensation for technical assistance 1,430,462 1,558,506 2,758,540  
Revenue for administrative services 0 0 0  
Financial Results [Abstract]        
Interest expenses $ 242,337 265,398 262,764  
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 $ 841,274 1,094,039 920,555  
Pampa Energia [Member] | Production and Commercialization of Liquids [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 1,049,966 366,914 2,770  
Pampa Energia [Member] | Other Services [Member]        
Detail of Significant Transactions with Related Parties [abstract]        
Revenues 614,644 366,206 483,633  
CIESA [Member]        
Balances and transactions with related parties [Abstract]        
Accounts receivable 0 50    
Accounts payable 0 0    
Costs [Abstract]        
Gas purchase and others 0 0 0  
Compensation for technical assistance 0 0 0  
Revenue for administrative services 140 199 306  
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 receivables includes Ps. 84,236 recorded as "Other receivables" as of December 31, 2020. Accounts payable includes Ps. 2,892,682 and Ps. 3,236,657 corresponding to the financial leasing recorded as "Loans" as of December 31, 2020 and 2019, respectively.