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PROPERTY, PLANT AND EQUIPMENT (Details) - ARS ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ 59,510,863    
Depreciation (3,695,615) $ (3,419,820) $ (3,107,746)
End of the year 74,552,728 59,510,863  
Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 31,687,288    
End of the year 32,096,888 31,687,288  
Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 7,207,835    
End of the year 8,502,651 7,207,835  
Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 18,449    
End of the year 17,550 18,449  
Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 423,428    
End of the year 442,647 423,428  
Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 60,666    
End of the year 58,856 60,666  
Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 39,397,666    
End of the year 41,118,592 39,397,666  
Non-regulated segment Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 61,467    
End of the year 10,108,485 61,467  
Non-regulated segment Compressor plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 1,328,033    
End of the year 1,256,207 1,328,033  
Non-regulated segment Other plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 3,349,945    
End of the year 7,763,817 3,349,945  
Non-regulated segment Stations of regulation and/or measurement of pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 128,348    
End of the year 586,027 128,348  
Non-regulated segment other technical installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 178,491    
End of the year 155,623 178,491  
Subtotal Assets Related to Other Services and Production and Commercialization of Liquids [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 5,046,284    
End of the year 19,870,159 5,046,284  
Lands [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 165,136    
End of the year 354,139 165,136  
Buildings and Constructions [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 1,357,927    
End of the year 1,726,401 1,357,927  
Facilities and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 158,319    
End of the year 147,489 158,319  
Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 355,487    
End of the year 454,273 355,487  
UT Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 223    
End of the year 0 223  
Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 756,841    
End of the year 1,200,936 756,841  
Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 134,645    
End of the year 172,700 134,645  
Furniture [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 7,232    
End of the year 5,995 7,232  
Materials [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 2,363,440    
End of the year 3,142,321 2,363,440  
Line Pack [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 551,061    
End of the year 466,905 551,061  
Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 9,216,602    
End of the year 5,892,818 9,216,602  
Cost [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 124,700,420 117,938,650  
Additions 18,838,338 10,624,291  
Retirements 247,963 3,862,521  
Transfers 0 0  
End of the year 143,290,795 124,700,420 117,938,650
Cost [Member] | Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 61,419,814 60,167,955  
Additions 0 0  
Retirements 13,330 27,845  
Transfers 1,933,215 1,279,704  
End of the year 63,339,699 61,419,814 60,167,955
Cost [Member] | Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 23,468,780 22,369,570  
Additions 399,897 0  
Retirements 179,885 474,819  
Transfers 2,033,984 1,574,029  
End of the year 25,722,776 23,468,780 22,369,570
Cost [Member] | Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 26,488 26,488  
Additions 0 0  
Retirements 0 0  
Transfers 0 0  
End of the year 26,488 26,488 26,488
Cost [Member] | Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 2,091,798 2,093,130  
Additions 0 1,663  
Retirements 0 9,150  
Transfers 76,900 6,155  
End of the year 2,168,698 2,091,798 2,093,130
Cost [Member] | Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 413,717 407,598  
Additions 0 0  
Retirements 0 2,046  
Transfers 7,440 8,165  
End of the year 421,157 413,717 407,598
Cost [Member] | Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 87,420,597 85,064,741  
Additions 399,897 1,663  
Retirements 193,215 513,860  
Transfers 4,051,539 2,868,053  
End of the year 91,678,818 87,420,597 85,064,741
Cost [Member] | Non-regulated segment Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 124,829 124,829  
Additions 0 0  
Retirements 0 0  
Transfers 10,109,995 0  
End of the year 10,234,824 124,829 124,829
Cost [Member] | Non-regulated segment Compressor plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 1,910,728 1,898,166  
Additions 0 0  
Retirements 0 4,330  
Transfers 145,605 16,892  
End of the year 2,056,333 1,910,728 1,898,166
Cost [Member] | Non-regulated segment Other plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 13,326,401 13,744,847  
Additions 0 9,207  
Retirements 0 1,029,228  
Transfers 4,726,393 601,575  
End of the year 18,052,794 13,326,401 13,744,847
Cost [Member] | Non-regulated segment Stations of regulation and/or measurement of pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 160,534 160,534  
Additions 11,284 0  
Retirements 0 0  
Transfers 457,977 0  
End of the year 629,795 160,534 160,534
Cost [Member] | Non-regulated segment other technical installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 254,016 254,016  
Additions 0 0  
Retirements 0 0  
Transfers 0 0  
End of the year 254,016 254,016 254,016
Cost [Member] | Subtotal Assets Related to Other Services and Production and Commercialization of Liquids [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 15,776,508 16,182,392  
Additions 11,284 9,207  
Retirements 0 1,033,558  
Transfers 15,439,970 618,467  
End of the year 31,227,762 15,776,508 16,182,392
Cost [Member] | Lands [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 165,136 110,509  
Additions 189,003 54,627  
Retirements 0 0  
Transfers 0 0  
End of the year 354,139 165,136 110,509
Cost [Member] | Buildings and Constructions [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 3,119,619 3,053,615  
Additions 0 0  
Retirements 948 73,980  
Transfers 428,387 139,984  
End of the year 3,547,058 3,119,619 3,053,615
Cost [Member] | Facilities and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 263,700 255,239  
Additions 0 0  
Retirements 0 18,078  
Transfers 97 26,539  
End of the year 263,797 263,700 255,239
Cost [Member] | Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 933,683 790,333  
Additions 172,586 199,925  
Retirements 7,758 73,467  
Transfers 6,207 16,892  
End of the year 1,104,718 933,683 790,333
Cost [Member] | UT Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 909 0  
Additions 0 909  
Retirements 0 0  
Transfers 0 0  
End of the year 909 909 0
Cost [Member] | Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 4,177,609 5,762,314  
Additions 3,440 258  
Retirements 0 2,085,323  
Transfers 662,582 500,360  
End of the year 4,843,631 4,177,609 5,762,314
Cost [Member] | Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 455,370 405,725  
Additions 80,860 58,593  
Retirements 24,497 8,948  
Transfers 0 0  
End of the year 511,733 455,370 405,725
Cost [Member] | Furniture [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 228,540 228,380  
Additions 0 0  
Retirements 0 0  
Transfers 0 160  
End of the year 228,540 228,540 228,380
Cost [Member] | Materials [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 2,363,440 2,419,633  
Additions 2,259,125 880,423  
Retirements 21,545 55,307  
Transfers (1,458,699) (881,309)  
End of the year 3,142,321 2,363,440 2,419,633
Cost [Member] | Line Pack [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 578,707 236,471  
Additions 0 0  
Retirements 0 0  
Transfers (84,156) 342,236  
End of the year 494,551 578,707 236,471
Cost [Member] | Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 9,216,602 3,429,298  
Additions 15,722,143 9,418,686  
Retirements 0 0  
Transfers (19,045,927) (3,631,382)  
End of the year 5,892,818 9,216,602 3,429,298
Depreciation [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (65,189,557) (65,388,407)  
Retirements (147,105) (3,618,670)  
Depreciation (3,695,615) (3,419,820)  
End of the year (68,738,067) (65,189,557) (65,388,407)
Depreciation [Member] | Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (29,732,526) (28,257,137)  
Retirements (7,747) (461)  
Depreciation $ (1,518,032) $ (1,475,850)  
Depreciation rate % 2.20% 2.20%  
End of the year $ (31,242,811) $ (29,732,526) (28,257,137)
Depreciation [Member] | Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (16,260,945) (15,721,120)  
Retirements (108,445) (429,105)  
Depreciation (1,067,625) (968,930)  
End of the year $ (17,220,125) $ (16,260,945) (15,721,120)
Depreciation [Member] | Compressor Plants [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 3.30% 3.30%  
Depreciation [Member] | Compressor Plants [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 25.00% 25.00%  
Depreciation [Member] | Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ (8,039) $ (7,141)  
Retirements 0 0  
Depreciation $ (899) $ (898)  
Depreciation rate % 3.30% 3.30%  
End of the year $ (8,938) $ (8,039) (7,141)
Depreciation [Member] | Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (1,668,370) (1,620,632)  
Retirements 0 (7,942)  
Depreciation $ (57,681) $ (55,680)  
Depreciation rate % 4.00% 4.00%  
End of the year $ (1,726,051) $ (1,668,370) (1,620,632)
Depreciation [Member] | Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (353,051) (346,264)  
Retirements 0 (2,046)  
Depreciation $ (9,250) $ (8,833)  
Depreciation rate % 6.70% 6.70%  
End of the year $ (362,301) $ (353,051) (346,264)
Depreciation [Member] | Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (48,022,931) (45,952,294)  
Retirements (116,192) (439,554)  
Depreciation (2,653,487) (2,510,191)  
End of the year (50,560,226) (48,022,931) (45,952,294)
Depreciation [Member] | Non-regulated segment Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (63,362) (61,868)  
Retirements 0 0  
Depreciation $ (62,977) $ (1,494)  
Depreciation rate % 2.20% 2.20%  
End of the year $ (126,339) $ (63,362) (61,868)
Depreciation [Member] | Non-regulated segment Compressor plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (582,695) (395,448)  
Retirements 0 (808)  
Depreciation (217,431) (188,055)  
End of the year $ (800,126) $ (582,695) (395,448)
Depreciation [Member] | Non-regulated segment Compressor plants [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 3.30% 3.30%  
Depreciation [Member] | Non-regulated segment Compressor plants [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 25.00% 25.00%  
Depreciation [Member] | Non-regulated segment Other plants [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ (9,976,456) $ (10,676,085)  
Retirements 0 (950,340)  
Depreciation $ (312,521) $ (250,711)  
Depreciation rate % 3.30% 3.30%  
End of the year $ (10,288,977) $ (9,976,456) (10,676,085)
Depreciation [Member] | Non-regulated segment Stations of regulation and/or measurement of pressure [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (32,186) (25,765)  
Retirements 0 0  
Depreciation $ (11,582) $ (6,421)  
Depreciation rate % 4.00% 4.00%  
End of the year $ (43,768) $ (32,186) (25,765)
Depreciation [Member] | Non-regulated segment other technical installations [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (75,525) (52,658)  
Retirements 0 0  
Depreciation $ (22,868) $ (22,867)  
Depreciation rate % 6.70% 6.70%  
End of the year $ (98,393) $ (75,525) (52,658)
Depreciation [Member] | Subtotal Assets Related to Other Services and Production and Commercialization of Liquids [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (10,730,224) (11,211,824)  
Retirements 0 (951,148)  
Depreciation (627,379) (469,548)  
End of the year (11,357,603) (10,730,224) (11,211,824)
Depreciation [Member] | Lands [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 0 0  
Retirements 0 0  
Depreciation $ 0 $ 0  
Depreciation rate % 0.00% 0.00%  
End of the year $ 0 $ 0 0
Depreciation [Member] | Buildings and Constructions [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (1,761,692) (1,765,318)  
Retirements (11) (58,701)  
Depreciation $ (58,976) $ (55,075)  
Depreciation rate % 2.00% 2.00%  
End of the year $ (1,820,657) $ (1,761,692) (1,765,318)
Depreciation [Member] | Facilities and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (105,381) (103,710)  
Retirements 0 (9,419)  
Depreciation $ (10,927) $ (11,090)  
Depreciation rate % 4.00% 4.00%  
End of the year $ (116,308) $ (105,381) (103,710)
Depreciation [Member] | Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (578,196) (609,507)  
Retirements (7,758) (73,206)  
Depreciation (80,007) (41,895)  
End of the year $ (650,445) $ (578,196) (609,507)
Depreciation [Member] | Machinery, Equipment and Tools [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 6.70% 6.70%  
Depreciation [Member] | Machinery, Equipment and Tools [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 10.00% 10.00%  
Depreciation [Member] | UT Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ (686) $ 0  
Retirements 0 0  
Depreciation (223) (686)  
End of the year $ (909) $ (686) 0
Depreciation [Member] | UT Machinery, Equipment and Tools [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 6.70% 6.70%  
Depreciation [Member] | UT Machinery, Equipment and Tools [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 10.00% 10.00%  
Depreciation [Member] | Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ (3,420,768) $ (5,203,218)  
Retirements 0 (2,078,177)  
Depreciation (221,927) (295,727)  
End of the year $ (3,642,695) $ (3,420,768) (5,203,218)
Depreciation [Member] | Computers and Telecommunication Systems [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 6.70% 6.70%  
Depreciation [Member] | Computers and Telecommunication Systems [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Depreciation rate % 20.00% 20.00%  
Depreciation [Member] | Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year $ (320,725) $ (294,870)  
Retirements (23,144) (8,465)  
Depreciation $ (41,452) $ (34,320)  
Depreciation rate % 20.00% 20.00%  
End of the year $ (339,033) $ (320,725) (294,870)
Depreciation [Member] | Furniture [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (221,308) (220,020)  
Retirements 0 0  
Depreciation $ (1,237) $ (1,288)  
Depreciation rate % 10.00% 10.00%  
End of the year $ (222,545) $ (221,308) (220,020)
Depreciation [Member] | Materials [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 0 0  
Retirements 0 0  
Depreciation $ 0 $ 0  
Depreciation rate % 0.00% 0.00%  
End of the year $ 0 $ 0 0
Depreciation [Member] | Line Pack [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year (27,646) (27,646)  
Retirements 0 0  
Depreciation $ 0 $ 0  
Depreciation rate % 0.00% 0.00%  
End of the year $ (27,646) $ (27,646) (27,646)
Depreciation [Member] | Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [Abstract]      
Beginning of the year 0 0  
Retirements 0 0  
Depreciation $ 0 $ 0  
Depreciation rate % 0.00% 0.00%  
End of the year $ 0 $ 0 $ 0