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Earnings/(Loss) Per Share Dividends - Summary of Net Earnings Per Share (Detail)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
ARS ($)
$ / shares
shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
ARS ($)
$ / shares
shares
Dec. 31, 2019
$ / shares
Dec. 31, 2018
ARS ($)
$ / shares
shares
Dec. 31, 2018
$ / shares
Profit (loss), attributable to ordinary equity holders of parent entity [abstract]            
Net Income / (Loss) attributable to controlling interest | $ $ 26,154,332   $ 28,205,071   $ (1,500,074)  
Net Income /(Loss) attributable to controlling interest adjusted as per diluted earnings | $ $ 26,154,332   $ 28,205,071   $ (1,500,074)  
Weighted average of outstanding common shares for the fiscal year | shares 639,413   639,402   661,141  
Weighted average of outstanding common shares for the fiscal year adjusted as per dilution effect | shares 639,413   639,402   661,141  
Basic earnings / (loss) per share | (per share) $ 40.9037 $ 40.9037 $ 44.1116 $ 44.1116 $ (2.2689) $ (2.2689)