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Basic and diluted earnings per share (Details) - ARS ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Notes and other explanatory information [abstract]      
Income for the year $ 272,128 $ 191,387 $ (44,014)
Weighted average number of common shares outstanding 875 875 875
Basic income (loss) per share - in pesos $ 311.00 $ 218.73 $ (50.30)
Diluted income (loss) per share - in pesos $ 311.00 $ 218.73 $ (50.30)