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Other Net Operating Results (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Other Operating Results Net [abstract]      
Result of companies' revaluation [1]     $ 11,980
Result for sale of participation in areas [1] $ 12,233 $ 778 2,322
Lawsuits (5,300) (2,732) (2,365)
Insurance 3,925 498 417
Construction incentive [2]   688  
Unrecoverable credit - Resolution MINEM No. 508/E-2017 [3]   (622)  
Result for contractual commitment Exmar [4] (8,285)    
Miscellaneous 1,376 260 (409)
Other operating results, net $ 3,949 $ (1,130) $ 11,945
[1] See Note 3.
[2] See Note 35.
[3] See Note 34.h.
[4] See Note 33.f.