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Trade Receivables - Summary of Changes in Provision for Doubtful Trade Receivables (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current      
Balance at beginning of year $ 33,645 $ 22,111  
Balance at end of year 40,649 33,645 $ 22,111
Noncurrent      
Balance at beginning of year 87 469  
Balance at end of year 2,210 87 469
Provision for Doubtful Trade Receivable [member]      
Current      
Balance at beginning of year 1,084 848 866
Increases charged to expenses 222 197 313
Decreases charged to income (194) (28) (412)
Amounts incurred due to utilization 0 0 (17)
Other movements 119    
Translation differences 92 67 98
Balance at end of year 1,323 1,084 848
Noncurrent      
Balance at beginning of year     7
Amounts incurred due to utilization     (7)
Other movements 0 0 0
Translation differences $ 0 $ 0 $ 0