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PROPERTY, PLANT AND EQUIPMENT - Movements for materials and PP&E (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Movements in impairment of materials and PP&E    
Property, plant and equipment at beginning of year $ 484,316  
Property, plant and equipment at end of year 451,174 $ 484,316
Materials | Allowance for obsolescence and impairment of materials    
Movements in impairment of materials and PP&E    
Property, plant and equipment at beginning of year 3,930 3,093
Additions (816) (848)
Currency translation adjustments 22 11
Property, plant and equipment at end of year 4,724 3,930
Materials | Allowance for obsolescence of inventories    
Movements in impairment of materials and PP&E    
Property, plant and equipment at beginning of year (3,930)  
Property, plant and equipment at end of year (4,724) (3,930)
PP&ES | Allowance for obsolescence of inventories    
Movements in impairment of materials and PP&E    
Property, plant and equipment at beginning of year (1,226) (1,648)
Additions (394) (1,360)
Uses   1,782
Property, plant and equipment at end of year $ (1,620) $ (1,226)