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Revenues - Summary of Credits, Contract Assets and Contract Liabilities (Detail) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of revenue [abstract]      
Current credits for contracts included in Trade Receivables $ 98,832 $ 100,706 $ 59,419
Current contract assets 871 203 420
Current contract liabilities 6,824 7,404 4,996
Noncurrent Credits for contracts included in Trade Receivables $ 15,505 6,785 7,804
Noncurrent Contract liabilities   $ 294 $ 1,828