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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, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year $ 308,014 $ 270,905  
Amount at end of year 354,443 308,014 $ 270,905
Provision for Obsolescence of Materials and Equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 1,380 762 313
Increase charged to profit/ (loss) 11 428 243
Decreases charged to profit/ (loss) (45)    
Amounts incurred due to utilization (7) (2) (6)
Transfers and other movements 65    
Translation differences 248 192 212
Amount at end of year $ 1,652 $ 1,380 $ 762