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Related-party transactions (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]      
Related-party expense $ (45,888) $ (34,284) $ (30,653)
EDELCOS [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense (40,490) (32,392) (28,834)
SACME [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense (1,650) (1,378) (1,601)
Andina PLC [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense (205) (499) (183)
Quantum Finanzas S.A [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense (3,541)
Estudio Cuneo Libarona Abogados [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense (15) (35)
Grieco Maria Teresa [Member]      
IfrsStatementLineItems [Line Items]      
Related-party expense $ (2)