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Benefit plans (Details 1) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Benefit Plans      
Benefit payment obligations at beginning of year $ 6,524 $ 6,835  
Current service cost 284 1,165 $ 402
Interest cost 2,144 2,578 4,178
Actuarial losses 1,447 2,037 (1,215)
Result from exposure to inflation for the year (4,429) (5,260)  
Benefits paid to participating employees (470) (831)  
Benefit payment obligations at end of year $ 5,500 $ 6,524 $ 6,835