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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, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year $ 354,443 $ 308,014  
Amount at end of year 699,087 354,443 $ 308,014
Provision for Obsolescence of Materials and Equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 1,652 1,380 762
Increase charged to profit/ (loss) 629 11 428
Decreases charged to profit/ (loss)   (45)  
Amounts incurred due to utilization (60) (7) (2)
Translation differences 1,666 248 192
Transfers and other movements 68 65  
Amount at end of year $ 3,955 $ 1,652 $ 1,380