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Expenses by Nature - Detailed Information about Expenses by Nature (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of expenses [line items]      
Salaries and social security taxes $ 64,427 $ 46,958 $ 26,847
Fees and compensation for services 12,842 10,317 6,210
Other personnel expenses 9,919 10,482 6,212
Taxes, charges and contributions 22,452 18,357 9,563
Royalties, easements and canons 42,863 42,540 31,813
Insurance 5,854 2,991 1,583
Rental of real estate and equipment 9,272 11,978 9,801
Survey expenses 526 1,212 848
Depreciation of property, plant and equipment 171,452 145,894 87,569
Amortization of intangible assets 3,428 2,374 1,749
Depreciation of right-of-use assets 17,873 10,509  
Industrial inputs, consumable materials and supplies 23,529 22,530 11,379
Operation services and other service contracts 38,922 21,792 16,676
Preservation, repair and maintenance 53,768 50,989 32,695
Unproductive exploratory drillings 3,586 3,832 3,331
Transportation, products and charges 37,965 39,374 22,333
Provision for doubtful trade receivables 12,317 3,184 353
Publicity and advertising expenses 3,263 3,616 1,929
Fuel, gas, energy and miscellaneous 20,177 10,792 10,764
Total 554,435 459,721 281,655
Production costs [Member]      
Disclosure of expenses [line items]      
Salaries and social security taxes 43,315 33,991 18,908
Fees and compensation for services 2,469 2,491 1,772
Other personnel expenses 8,789 8,941 5,313
Taxes, charges and contributions 7,287 7,370 3,634
Royalties, easements and canons 42,709 42,135 31,677
Insurance 5,314 2,692 1,335
Rental of real estate and equipment 7,332 11,079 8,983
Depreciation of property, plant and equipment 161,453 139,345 83,700
Amortization of intangible assets 2,821 2,020 1,497
Depreciation of right-of-use assets 16,868 9,835  
Industrial inputs, consumable materials and supplies 22,838 22,095 11,126
Operation services and other service contracts 34,492 18,512 14,973
Preservation, repair and maintenance 50,850 48,762 31,141
Transportation, products and charges 20,966 23,137 12,714
Fuel, gas, energy and miscellaneous 14,761 5,876 7,567
Total 442,264 378,281 234,340
Administrative expenses [Member]      
Disclosure of expenses [line items]      
Salaries and social security taxes 13,056 8,075 4,867
Fees and compensation for services 8,667 6,389 3,534
Other personnel expenses 768 962 571
Taxes, charges and contributions 430 312 275
Insurance 403 181 130
Rental of real estate and equipment 48 38 24
Depreciation of property, plant and equipment 4,170 2,839 1,758
Amortization of intangible assets 567 323 222
Depreciation of right-of-use assets 16    
Industrial inputs, consumable materials and supplies 258 183 59
Operation services and other service contracts 588 744 372
Preservation, repair and maintenance 1,365 1,021 620
Transportation, products and charges 2 15 4
Publicity and advertising expenses 2,481 2,551 951
Fuel, gas, energy and miscellaneous 1,671 1,068 535
Total 34,490 24,701 13,922
Selling expenses [Member]      
Disclosure of expenses [line items]      
Salaries and social security taxes 7,230 4,226 2,592
Fees and compensation for services 1,694 1,265 883
Other personnel expenses 326 513 278
Taxes, charges and contributions 14,664 10,627 5,626
Royalties, easements and canons 74 122 64
Insurance 137 118 118
Rental of real estate and equipment 1,892 861 766
Depreciation of property, plant and equipment 5,829 3,710 2,111
Amortization of intangible assets 40 31 30
Depreciation of right-of-use assets 989 674  
Industrial inputs, consumable materials and supplies 406 201 172
Operation services and other service contracts 3,298 2,249 1,302
Preservation, repair and maintenance 1,501 1,081 886
Transportation, products and charges 16,997 16,222 9,615
Provision for doubtful trade receivables 12,317 3,184 353
Publicity and advertising expenses 782 1,065 978
Fuel, gas, energy and miscellaneous 3,659 3,749 2,153
Total 71,835 49,898 27,927
Exploration expenses [Member]      
Disclosure of expenses [line items]      
Salaries and social security taxes 826 666 480
Fees and compensation for services 12 172 21
Other personnel expenses 36 66 50
Taxes, charges and contributions 71 48 28
Royalties, easements and canons 80 283 72
Rental of real estate and equipment     28
Survey expenses 526 1,212 848
Industrial inputs, consumable materials and supplies 27 51 22
Operation services and other service contracts 544 287 29
Preservation, repair and maintenance 52 125 48
Unproductive exploratory drillings 3,586 3,832 3,331
Fuel, gas, energy and miscellaneous 86 99 509
Total $ 5,846 $ 6,841 $ 5,466