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Deconsolidation of Maxus Entities - Deconsolidation of Balance Sheet (Detail) - ARS ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deconsolidation [Line Items]      
Noncurrent assets $ 383,420 $ 333,913 $ 286,480
Current assets 122,298 87,226 76,973
Total assets 505,718 421,139 363,453
Noncurrent liabilities 250,451 220,012 163,201
Current liabilities 102,734 82,466 79,791
Total liabilities 353,185 302,478 242,992
Total liabilities and shareholders' equity $ 505,718 $ 421,139 363,453
Maxus Entities [Member]      
Deconsolidation [Line Items]      
Noncurrent assets     732
Current assets     416
Total assets     1,148
Noncurrent liabilities     3,966
Current liabilities     669
Total liabilities     4,635
Total liabilities and shareholders' equity     $ 1,148