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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Summary of Capitalized Costs, Along with the related Accumulated Depreciation and Allowances (Detail) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Argentina [member]      
Disclosure of information about consolidated structured entities [Line Items]      
Mineral property, wells and related equipment $ 3,889,483 $ 2,693,690 $ 1,594,064
Support equipment and facilities 113,563 80,012 47,224
Drilling and work in progress 159,614 142,122 80,737
Unproved oil and gas properties 20,044 30,012 14,909
Total capitalized costs 4,182,704 2,945,836 1,736,933
Accumulated depreciation and valuation allowances (3,306,031) (2,239,487) (1,283,840)
Net capitalized costs 876,673 706,349 453,093
Other foreign [Member]      
Disclosure of information about consolidated structured entities [Line Items]      
Mineral property, wells and related equipment 3,052 2,033  
Unproved oil and gas properties     1,241
Total capitalized costs 3,052 2,033 1,241
Accumulated depreciation and valuation allowances (2,827) (1,973) (489)
Net capitalized costs 225 60 752
Worldwide [member]      
Disclosure of information about consolidated structured entities [Line Items]      
Mineral property, wells and related equipment 3,892,535 2,695,723 1,594,064
Support equipment and facilities 113,563 80,012 47,224
Drilling and work in progress 159,614 142,122 80,737
Unproved oil and gas properties 20,044 30,012 16,150
Total capitalized costs 4,185,756 2,947,869 1,738,174
Accumulated depreciation and valuation allowances (3,308,858) (2,241,460) (1,284,328)
Net capitalized costs $ 876,898 $ 706,409 $ 453,846