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BUSINESS DESCRIPTION, Major Shareholders (Details) | 12 Months Ended
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Dec. 31, 2020
Transporte y Servicios de Gas en Uruguay S.A. (TGU) [Member] |
Major Shareholders [Abstract] |
Percentage of ownership in associate | 49.00%
EGS S.A. [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 51.00%
Percentage of ownership in associate | 49.00%
Gas Link S.A. [Member] |
Major Shareholders [Abstract] |
Percentage of ownership in associate | 49.00%
TELCOSUR S.A. [Member] |
Major Shareholders [Abstract] |
Percentage of ownership interest in subsidiary | 99.98%
CTG ENERGIA S.A.U. (CTG) [Member] |
Major Shareholders [Abstract] |
Percentage of ownership interest in subsidiary | 100.00%
Pampa Energia [Member] | Transporte y Servicios de Gas en Uruguay S.A. (TGU) [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 51.00%
Pampa Energia [Member] | TELCOSUR S.A. [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 0.02%
Public Offering [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 44.00%
Public Offering [Member] | FGS-ANSES [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 24.00%
Public Offering [Member] | BYMA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 8.00%
Public Offering [Member] | NYSE [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 12.00%
Treasury Shares [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 5.00%
CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 51.00%
CIESA [Member] | Pampa Energia [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 50.00%
CIESA [Member] | GIP and PCT [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 50.00%
DINAREL S.A. [Member] | Gas Link S.A. [Member] |
Major Shareholders [Abstract] |
Percentage of joint ownership | 51.00%

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