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PROPERTY, PLANT AND EQUIPMENT (Details) - ARS ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 5,333,344 $ 4,219,520  
Depreciation 358,420 286,798 $ 261,393
End of the year 6,480,361 5,333,344 4,219,520
Financial Lease [Abstract]      
Cost-Capitalized financial leasing 750,389 750,389  
Accumulated depreciation (68,503) (20,148)  
Total $ 681,886 730,241  
Financial leasing agreement expiration date Sep. 30, 2026    
Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 2,040,118 2,124,502  
End of the year 2,224,472 2,040,118 2,124,502
Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 571,027 601,940  
End of the year 759,762 571,027 601,940
Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 2,217 2,314  
End of the year 2,120 2,217 2,314
Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 43,081 41,256  
End of the year 43,243 43,081 41,256
Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 6,917 7,390  
End of the year 8,616 6,917 7,390
Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 2,663,360 2,777,402  
End of the year 3,038,213 2,663,360 2,777,402
Assets Related to Natural Gas Upstream Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 831,487 87,530  
End of the year 886,397 831,487 87,530
Assets Related to Liquids Production and Commercialization Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 199,661 186,414  
End of the year 286,430 199,661 186,414
Lands [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 10,922 6,279  
End of the year 10,926 10,922 6,279
Buildings and Constructions [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 100,363 96,360  
End of the year 118,500 100,363 96,360
Fittings and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 27,370 28,299  
End of the year 26,183 27,370 28,299
Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 14,289 10,285  
End of the year 61,649 14,289 10,285
Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 105,697 111,147  
End of the year 123,995 105,697 111,147
Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 15,951 8,721  
End of the year 39,645 15,951 8,721
Furniture [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 1,884 633  
End of the year 1,796 1,884 633
Capitalization of Foreign Exchange Loss [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 63,477 71,000  
End of the year 57,202 63,477 71,000
Materials [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 482,546 356,008  
End of the year 622,559 482,546 356,008
Line Pack [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 12,254 12,254  
End of the year 12,254 12,254 12,254
Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 804,083 467,188  
End of the year 1,194,612 804,083 467,188
Cost [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 9,449,249 8,049,016 7,651,564
Additions 1,513,251 1,407,823 407,323
Retirements 18,774 7,590 9,871
Transfers 0 0 0
End of the year 10,943,726 9,449,249 8,049,016
Cost [Member] | Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 3,646,711 3,644,917 3,631,240
Additions 0 0 0
Retirements 0 0 0
Transfers 275,806 1,794 13,677
End of the year 3,922,517 3,646,711 3,644,917
Cost [Member] | Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 1,564,820 1,512,294 1,436,084
Additions 1,418 306 0
Retirements 11,274 0 0
Transfers 289,319 52,220 76,210
End of the year 1,844,283 1,564,820 1,512,294
Cost [Member] | Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 2,868 2,868 2,868
Additions 0 0 0
Retirements 0 0 0
Transfers 0 0 0
End of the year 2,868 2,868 2,868
Cost [Member] | Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 136,288 129,228 129,228
Additions 0 0 0
Retirements 0 0 0
Transfers 5,594 7,060 0
End of the year 141,882 136,288 129,228
Cost [Member] | Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 28,861 28,368 28,355
Additions 0 0 0
Retirements 0 0 0
Transfers 2,686 493 13
End of the year 31,547 28,861 28,368
Cost [Member] | Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 5,379,548 5,317,675 5,227,775
Additions 1,418 306 0
Retirements 11,274 0 0
Transfers 573,405 61,567 89,900
End of the year 5,943,097 5,379,548 5,317,675
Cost [Member] | Assets Related to Natural Gas Upstream Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 972,061 206,576 205,773
Additions 0 750,389 423
Retirements 0 0 566
Transfers 143,034 15,096 946
End of the year 1,115,095 972,061 206,576
Cost [Member] | Assets Related to Liquids Production and Commercialization Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 782,595 756,700 695,548
Additions 0 0 0
Retirements 0 0 313
Transfers 104,059 25,895 61,465
End of the year 886,654 782,595 756,700
Cost [Member] | Lands [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 10,922 6,279 6,279
Additions 4 4,935 0
Retirements 0 292 0
Transfers 0 0 0
End of the year 10,926 10,922 6,279
Cost [Member] | Buildings and Constructions [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 206,842 198,796 196,204
Additions 0 0 0
Retirements 0 0 0
Transfers 22,734 8,046 2,592
End of the year 229,576 206,842 198,796
Cost [Member] | Fittings and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 34,398 33,897 33,975
Additions 0 0 0
Retirements 0 0 242
Transfers 265 501 164
End of the year 34,663 34,398 33,897
Cost [Member] | Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 55,004 48,655 46,917
Additions 51,268 5,780 1,130
Retirements 0 0 6
Transfers 929 569 614
End of the year 107,201 55,004 48,655
Cost [Member] | Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 470,349 419,541 389,779
Additions 0 660 0
Retirements 0 0 0
Transfers 49,345 50,148 29,762
End of the year 519,694 470,349 419,541
Cost [Member] | Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 44,900 33,072 31,064
Additions 30,577 12,281 2,403
Retirements 1,972 453 395
Transfers 0 0 0
End of the year 73,505 44,900 33,072
Cost [Member] | Furniture [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 14,857 13,485 13,147
Additions 0 0 62
Retirements 0 0 0
Transfers 143 1,372 276
End of the year 15,000 14,857 13,485
Cost [Member] | Capitalization of Foreign Exchange Loss [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 177,272 177,272 177,272
Additions 0 0 0
Retirements 0 0 0
Transfers 0 0 0
End of the year 177,272 177,272 177,272
Cost [Member] | Materials [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 482,546 356,008 286,677
Additions 312,381 209,239 161,986
Retirements 5,528 6,845 8,349
Transfers (166,840) (75,856) (84,306)
End of the year 622,559 482,546 356,008
Cost [Member] | Line Pack [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 13,872 13,872 13,872
Additions 0 0 0
Retirements 0 0 0
Transfers 0 0 0
End of the year 13,872 13,872 13,872
Cost [Member] | Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 804,083 467,188 327,282
Additions 1,117,603 424,233 241,319
Retirements 0 0 0
Transfers (727,074) (87,338) (101,413)
End of the year 1,194,612 804,083 467,188
Depreciation [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 4,115,905 3,829,496 3,569,493
Retirements 10,960 389 1,390
Depreciation 358,420 286,798 261,393
End of the year 4,463,365 4,115,905 3,829,496
Depreciation [Member] | Pipelines [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 1,606,593 1,520,415 1,434,424
Retirements 0 0 0
Depreciation $ 91,452 $ 86,178 $ 85,991
Depreciation rate % 2.20% 2.20% 2.20%
End of the year $ 1,698,045 $ 1,606,593 $ 1,520,415
Depreciation [Member] | Compressor Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 993,793 910,354 834,255
Retirements 8,988 0 0
Depreciation 99,716 83,439 76,099
End of the year $ 1,084,521 $ 993,793 $ 910,354
Depreciation [Member] | Compressor Plants [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Depreciation rate % 3.30% 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% 25.00%
Depreciation [Member] | Other Plants [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 651 $ 554 $ 456
Retirements 0 0 0
Depreciation $ 97 $ 97 $ 98
Depreciation rate % 3.30% 3.30% 3.30%
End of the year $ 748 $ 651 $ 554
Depreciation [Member] | Stations of Regulation and/or Measurement of Pressure [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 93,207 87,972 82,806
Retirements 0 0 0
Depreciation $ 5,432 $ 5,235 $ 5,166
Depreciation rate % 4.00% 4.00% 4.00%
End of the year $ 98,639 $ 93,207 $ 87,972
Depreciation [Member] | Other Technical Installations [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 21,944 20,978 20,002
Retirements 0 0 0
Depreciation $ 987 $ 966 $ 976
Depreciation rate % 6.70% 6.70% 6.70%
End of the year $ 22,931 $ 21,944 $ 20,978
Depreciation [Member] | Subtotal Assets Related to Natural Gas Transportation Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 2,716,188 2,540,273 2,371,943
Retirements 8,988 0 0
Depreciation 197,684 175,915 168,330
End of the year 2,904,884 2,716,188 2,540,273
Depreciation [Member] | Assets Related to Natural Gas Upstream Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 140,574 119,046 111,667
Retirements 0 0 536
Depreciation 88,124 21,528 7,915
End of the year $ 228,698 $ 140,574 $ 119,046
Depreciation [Member] | Assets Related to Natural Gas Upstream Service [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Depreciation rate % 3.30% 3.30% 2.20%
Depreciation [Member] | Assets Related to Natural Gas Upstream Service [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Depreciation rate % 25.00% 25.00% 25.00%
Depreciation [Member] | Assets Related to Liquids Production and Commercialization Service [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 582,934 $ 570,286 $ 526,427
Retirements 0 0 311
Depreciation $ 17,290 $ 12,648 $ 44,170
Depreciation rate % 3.30% 3.30% 5.90%
End of the year $ 600,224 $ 582,934 $ 570,286
Depreciation [Member] | Lands [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 0 0 0
Retirements 0 0 0
Depreciation $ 0 $ 0 $ 0
Depreciation rate % 0.00% 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 106,479 102,436 97,700
Retirements 0 0 0
Depreciation $ 4,597 $ 4,043 $ 4,736
Depreciation rate % 2.00% 2.00% 2.00%
End of the year $ 111,076 $ 106,479 $ 102,436
Depreciation [Member] | Fittings and Features in Building [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 7,028 5,598 4,319
Retirements 0 0 142
Depreciation $ 1,452 $ 1,430 $ 1,421
Depreciation rate % 4.00% 4.00% 4.00%
End of the year $ 8,480 $ 7,028 $ 5,598
Depreciation [Member] | Machinery, Equipment and Tools [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 40,715 38,370 36,400
Retirements 0 0 6
Depreciation 4,837 2,345 1,976
End of the year $ 45,552 $ 40,715 $ 38,370
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% 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% 20.00%
Depreciation [Member] | Computers and Telecommunication Systems [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 364,652 $ 308,394 $ 286,351
Retirements 0 0 0
Depreciation 31,047 56,258 22,043
End of the year $ 395,699 $ 364,652 $ 308,394
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% 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% 20.00%
Depreciation [Member] | Vehicles [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year $ 28,949 $ 24,351 $ 21,571
Retirements 1,972 389 395
Depreciation $ 6,883 $ 4,987 3,175
Depreciation rate % 20.00% 20.00%  
End of the year $ 33,860 $ 28,949 $ 24,351
Depreciation [Member] | Vehicles [Member] | Bottom of Range [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Depreciation rate %     10.00%
Depreciation [Member] | Vehicles [Member] | Top of Range [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Depreciation rate %     20.00%
Depreciation [Member] | Furniture [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 12,973 12,852 $ 12,743
Retirements 0 0 0
Depreciation $ 231 $ 121 $ 109
Depreciation rate % 10.00% 10.00% 10.00%
End of the year $ 13,204 $ 12,973 $ 12,852
Depreciation [Member] | Capitalization of Foreign Exchange Loss [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 113,795 106,272 98,754
Retirements 0 0 0
Depreciation $ 6,275 $ 7,523 $ 7,518
Depreciation rate % 4.00% 4.00% 4.00%
End of the year $ 120,070 $ 113,795 $ 106,272
Depreciation [Member] | Materials [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 0 0 0
Retirements 0 0 0
Depreciation $ 0 $ 0 $ 0
Depreciation rate % 0.00% 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 1,618 1,618 1,618
Retirements 0 0 0
Depreciation $ 0 $ 0 $ 0
Depreciation rate % 0.00% 0.00% 0.00%
End of the year $ 1,618 $ 1,618 $ 1,618
Depreciation [Member] | Works in Progress [Member]      
Reconciliation of changes in property, plant and equipment [abstract]      
Beginning of the year 0 0 0
Retirements 0 0 0
Depreciation $ 0 $ 0 $ 0
Depreciation rate % 0.00% 0.00% 0.00%
End of the year $ 0 $ 0 $ 0