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Expenses by nature (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses $ 482,136 $ 466,946 $ 373,737
Selling expenses 203,689 180,230 160,529
Administrative expenses 172,719 164,813 134,272
Expenses by nature 858,544 811,989 668,538
Salaries And Social Security Taxes [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 160,000 165,965 152,935
Selling expenses 20,259 22,915 22,885
Administrative expenses 47,671 52,316 46,148
Expenses by nature 227,930 241,196 221,968
Pension Plans [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 9,582 3,637 5,616
Selling expenses 1,213 502 841
Administrative expenses 2,855 1,147 1,694
Expenses by nature 13,650 5,286 8,151
Communications Expenses [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 7,547 5,161 3,007
Selling expenses 6,070 5,280 5,727
Administrative expenses 95 21 9
Expenses by nature 13,712 10,462 8,743
Allowance For The Impairment Of Trade And Other Receivables [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses 9,474 14,506 14,910
Administrative expenses
Expenses by nature 9,474 14,506 14,910
Supplies Consumption [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 34,780 22,464 22,092
Selling expenses
Administrative expenses 2,850 1,622 2,232
Expenses by nature 37,630 24,086 24,324
Leases And Insurance [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 1,930 1,434 1,326
Selling expenses 33 29 30
Administrative expenses 5,535 4,053 6,282
Expenses by nature 7,498 5,516 7,638
Security Service [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 16,161 6,336 7,519
Selling expenses 764 464 969
Administrative expenses 915 3,478 1,196
Expenses by nature 17,840 10,278 9,684
Fees And Remuneration For Services [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 104,173 106,716 69,474
Selling expenses 44,942 41,119 38,927
Administrative expenses 70,377 64,544 45,032
Expenses by nature 219,492 212,379 153,433
Public Relations And Marketing [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses 9,145 14,472 12,859
Administrative expenses
Expenses by nature 9,145 14,472 12,859
Advertising And Sponsorship [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses 4,711 7,455 6,624
Administrative expenses
Expenses by nature 4,711 7,455 6,624
Reimbursements To Personnel [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses
Administrative expenses 7 9 13
Expenses by nature 7 9 13
Depreciation Of Property Plants And Equipments [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 121,577 141,752 97,049
Selling expenses 18,117 21,124 14,462
Administrative expenses 14,865 17,332 11,866
Expenses by nature 154,559 180,208 123,377
Depreciation Of Right Of Use Asset [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 1,062 616 701
Selling expenses 2,124 1,232 1,400
Administrative expenses 7,434 4,313 4,902
Expenses by nature 10,620 6,161 7,003
Directors And Supervisory Committee Members Fees [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses
Administrative expenses 567 351 468
Expenses by nature 567 351 468
Enre Penalties [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 25,293 12,844 14,007
Selling expenses 55,378 27,763 19,006
Administrative expenses
Expenses by nature 80,671 40,607 33,013
Taxes And Charges [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses
Selling expenses 31,455 23,365 21,887
Administrative expenses 18,980 15,230 14,132
Expenses by nature 50,435 38,595 36,019
Other [Member]      
IfrsStatementLineItems [Line Items]      
Transmission and distribution expenses 31 21 11
Selling expenses 4 4 2
Administrative expenses 568 397 298
Expenses by nature $ 603 $ 422 $ 311