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OTHER LIABILITIES - Movements in the pension benefits (Details) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Movements in the pension benefits    
At the beginning of the year $ 637 $ 673
Service cost (*) 31 54
Interest cost (**) 225 356
Actuarial results (***) (35) (204)
Uses (Includes RECPAM) (281) (242)
At the end of the year $ 647 $ 637