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Benefit plans (Details 1) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Benefit Plans      
Benefit payment obligations at beginning of year $ 11,977 $ 14,207  
Current service cost 1,160 618 $ 2,537
Interest cost 12,490 4,668 5,614
Actuarial losses (3,497) 3,152 4,436
Result from exposure to inflation for the year (6,478) (9,645)  
Benefits paid to participating employees (563) (1,023)  
Benefit payment obligations at end of year $ 15,089 $ 11,977 $ 14,207