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Property, plant and equipment (Details) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Cost $ 607,192.0 $ 574,227.0 $ 543,628.0
Accumlated depreciation (211,252.0) (193,646.0) (176,487.0)
Property, plant, and equipment, beginning 380,581.0 367,141.0  
Additions 33,900.0 31,653.0  
Disposals (348.0) (485.0)  
Transfers  
Depreciation for the period (18,193.0) (17,728.0)  
Property, plant, and equipment, ending 395,940.0 380,581.0  
Direct own costs 4,484.9 4,481.0  
Impairment    
Land and buildings [member]      
IfrsStatementLineItems [Line Items]      
Cost 11,104.0 11,060.0 10,710.0
Accumlated depreciation (2,526.0) (2,355.0) (2,102.0)
Property, plant, and equipment, beginning 8,705.0 8,608.0  
Additions 80.0 97.0  
Disposals (12.0)  
Transfers 28.0 263.0  
Depreciation for the period (235.0) (251.0)  
Property, plant, and equipment, ending 8,578.0 8,705.0  
Impairment    
Substations member      
IfrsStatementLineItems [Line Items]      
Cost 103,931.0 99,296.0 92,493.0
Accumlated depreciation (37,862.0) (34,319.0) (30,953.0)
Property, plant, and equipment, beginning 64,977.0 61,540.0  
Additions 84.0 615.0  
Disposals  
Transfers 4,552.0 6,194.0  
Depreciation for the period (3,544.0) (3,372.0)  
Property, plant, and equipment, ending 66,069.0 64,977.0  
Impairment    
Voltage lines member      
IfrsStatementLineItems [Line Items]      
Cost 258,108.0 247,276.0 235,649.0
Accumlated depreciation (106,714.0) (98,972.0) (91,107.0)
Property, plant, and equipment, beginning 148,304.0 144,542.0  
Additions 777.0 450.0  
Disposals (215.0) (62.0)  
Transfers 10,722.0 11,550.0  
Depreciation for the period (8,194.0) (8,176.0)  
Property, plant, and equipment, ending 151,394.0 148,304.0  
Impairment    
Meters chambers platforms member      
IfrsStatementLineItems [Line Items]      
Cost 113,563.0 107,449.0 102,979.0
Accumlated depreciation (48,214.0) (44,178.0) (40,260.0)
Property, plant, and equipment, beginning 63,271.0 62,719.0  
Additions 1,009.0 878.0  
Disposals (133.0) (409.0)  
Transfers 5,309.0 4,217.0  
Depreciation for the period (4,107.0) (4,134.0)  
Property, plant, and equipment, ending 65,349.0 63,271.0  
Impairment    
Other property, plant and equipment [member]      
IfrsStatementLineItems [Line Items]      
Cost 29,456.0 23,242.0 18,429.0
Accumlated depreciation (15,936.0) (13,822.0) (12,065.0)
Property, plant, and equipment, beginning 9,420.0 6,364.0  
Additions 2,029.0 2,903.0  
Disposals (2.0)  
Transfers 4,184.0 1,950.0  
Depreciation for the period (2,113.0) (1,795.0)  
Property, plant, and equipment, ending 13,520.0 9,420.0  
Impairment    
Construction in process member      
IfrsStatementLineItems [Line Items]      
Cost 89,826.0 84,965.0 82,423.0
Accumlated depreciation
Property, plant, and equipment, beginning 84,965.0 82,423.0  
Additions 29,921.0 23,915.0  
Disposals  
Transfers (25,060.0) (21,373.0)  
Depreciation for the period    
Property, plant, and equipment, ending 89,826.0 84,965.0  
Impairment    
Suppliers and spare parts member      
IfrsStatementLineItems [Line Items]      
Cost 1,204.0 939.0 945.0
Accumlated depreciation
Property, plant, and equipment, beginning 939.0 945.0  
Additions 2,795.0  
Disposals  
Transfers 265.0 (2,801.0)  
Depreciation for the period    
Property, plant, and equipment, ending $ 1,204.0 939.0  
Impairment