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Property, Plant and Equipment - Summary of Provision for Obsolescence of Materials and Equipment (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year $ 1,069,011 $ 699,087  
Amount at end of year 1,379,527 1,069,011 $ 699,087
Provision for Obsolescence of Materials and Equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 6,610 3,955 1,652
Increase charged to profit or loss 1,977 410 629
Decreases charged to profit or loss (1) (22)  
Amounts incurred due to utilization (6) (48) (60)
Translation differences 2,687 2,315 1,666
Transfers and other movements     68
Amount at end of year $ 11,267 $ 6,610 $ 3,955