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10 Expenses by nature (Details Narrative) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Expenses By Nature      
Description of technical service quality-related penalties Includes recovery of technical service quality-related penalties of six-month control periods Nos. 47 and 48 for $ 700.8 million, due to the fact that quality levels were better than estimated.    
Expenses capitalized in property, plant and equipment $ 1,846.0 $ 1,533.5 $ 2,137.9