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18 Trade receivables (Details 1) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Trade Receivables    
Balance at beginning of the year $ 2,105 $ 1,887
Increase 4,173 1,858
Decrease (615) (1,050)
Result from exposure to inflation (1,058) (590)
Balance at end of the year $ 4,605 $ 2,105