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Property Plant and Equipment - Summary of Changes in Property Plant and Equipment (Parenthetical) (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2020
ARS ($)
Property
Well
Dec. 31, 2019
ARS ($)
Property
Dec. 31, 2018
ARS ($)
Property
Dec. 31, 2017
ARS ($)
Disclosure of detailed information about property, plant and equipment [line items]        
Exploratory wells in progress | Well 10      
Drilled wells | Well 4      
Charged to exploratory expense | Well 6      
Transferred to proved properties | Property 12      
Net book value charged to Property, plant and equipment provisions $ 1,256 $ 48 $ 60  
Depreciation of property plant and equipment 171,452 145,894 87,569  
Property, plant and equipment 1,379,527 1,069,011 $ 699,087  
Reclassification of assets held for disposal       $ 8,823
Cost increases of short-term leases 599 2,109    
Cost increases of variable charge of leases related to the underlying asset return/use 1,669 1,228    
Capitalization of amortization of right-of-use assets 3,789 2,021    
Capitalization of financial accretion for lease liabilities $ 967 $ 311    
Bandurria Sur Area [Member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Disposal percentage 11.00%      
Mineral Property, Wells and Related Equipment [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Mineral property | Property 34,801 22,343 16,154  
Addition for the acquisition of a participation in several areas [member] | At cost [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment     $ 1,470  
Oil Combustibles SA [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Cost increases from business combination     2,327  
Cost [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment $ 5,324,256 $ 3,736,313 2,238,391 1,062,055
Reclassification of assets held for disposal 2,715   31,800  
Cost [member] | Bandurria Sur Area [Member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Reclassification of assets held for disposal 2,027      
Accumulated depreciation [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment 3,868,108 2,579,363 1,498,288 $ 679,425
Reclassification of assets held for disposal 2,221   28,673  
Accumulated depreciation [member] | Bandurria Sur Area [Member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Reclassification of assets held for disposal 204      
Accumulated depreciation [member] | Addition for the acquisition of a participation in several areas [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Property, plant and equipment     1,092  
Hydrocarbon Wells Abandonmnet [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Increase/(Decrease) of cost of Property, plant and equipment (13,918) 1,172 (11,710)  
Depreciation of property plant and equipment $ 12,492 $ 4,664 $ 5,521