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Property Plant and Equipment - Summary of Changes in Property Plant and Equipment (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year $ 1,379,527 $ 1,069,011  
Amount at end of year 1,642,259 1,379,527 $ 1,069,011
Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 5,324,256 3,736,313 2,238,391
Increases 259,988 96,278 172,844
Translation effect 1,163,191 1,493,677 1,322,423
Adjustment for inflation 54,828 27,585 24,975
Decreases, reclassifications and other movements (47,655) (29,597) (22,320)
Amount at end of year 6,754,608 5,324,256 3,736,313
Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 3,868,108 2,579,363 1,498,288
Increases 288,960 214,313 163,329
Translation effect 865,306 1,072,346 907,519
Adjustment for inflation 27,847 13,940 12,988
Decreases, reclassifications and other movements (17,241) (11,854) (2,761)
Amount at end of year 5,032,980 3,868,108 2,579,363
Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 1,456,148 1,156,950 740,103
Amount at end of year 1,721,628 1,456,148 1,156,950
Land and buildings [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 107,764 77,193 48,047
Increases 522 62 46
Translation effect 21,309 27,498 24,838
Adjustment for inflation 6,839 3,600 3,382
Decreases, reclassifications and other movements 1,533 (589) 880
Amount at end of year 137,967 107,764 77,193
Land and buildings [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 51,774 36,553 22,114
Increases 2,526 2,054 1,260
Translation effect 10,021 13,013 11,444
Adjustment for inflation 3,545 1,801 1,726
Decreases, reclassifications and other movements (541) (1,647) 9
Amount at end of year 67,325 51,774 36,553
Land and buildings [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 55,990 40,640 25,933
Amount at end of year 70,642 55,990 40,640
Mining Property, Wells and Related Equipment [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 3,879,215 2,688,553 1,604,868
Increases 3,896 (13,412) 1,980
Translation effect 867,307 1,110,354 967,212
Decreases, reclassifications and other movements 150,411 93,720 114,493
Amount at end of year 4,900,829 3,879,215 2,688,553
Mining Property, Wells and Related Equipment [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 3,185,191 2,125,588 1,231,930
Increases 234,245 171,786 137,017
Translation effect 722,567 896,732 758,928
Decreases, reclassifications and other movements (14,973) (8,915) (2,287)
Amount at end of year 4,127,030 3,185,191 2,125,588
Mining Property, Wells and Related Equipment [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 694,024 562,965 372,938
Amount at end of year 773,799 694,024 562,965
Refinery equipment and petrochemical plants [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 683,186 472,630 280,451
Increases 4,548 1,724 4,676
Translation effect 153,012 194,960 171,788
Decreases, reclassifications and other movements 13,746 13,872 15,715
Amount at end of year 854,492 683,186 472,630
Refinery equipment and petrochemical plants [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 400,536 261,965 152,295
Increases 33,888 27,195 16,092
Translation effect 91,187 111,376 93,611
Decreases, reclassifications and other movements (127)   (33)
Amount at end of year 525,484 400,536 261,965
Refinery equipment and petrochemical plants [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 282,650 210,665 128,156
Amount at end of year 329,008 282,650 210,665
Transportation equipment [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 38,319 27,042 16,162
Increases 589 119 83
Translation effect 7,842 10,051 8,723
Adjustment for inflation 1,734 902 716
Decreases, reclassifications and other movements 1,813 205 1,358
Amount at end of year 50,297 38,319 27,042
Transportation equipment [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 26,699 17,951 10,579
Increases 2,163 1,679 1,345
Translation effect 5,487 6,905 5,917
Adjustment for inflation 1,121 524 486
Decreases, reclassifications and other movements (851) (360) (376)
Amount at end of year 34,619 26,699 17,951
Transportation equipment [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 11,620 9,091 5,583
Amount at end of year 15,678 11,620 9,091
Materials and equipment in warehouse [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 89,726 62,423 34,990
Increases 61,152 33,422 43,089
Translation effect 16,918 24,712 21,044
Adjustment for inflation 749 421 920
Decreases, reclassifications and other movements (60,031) (31,252) (37,620)
Amount at end of year 108,514 89,726 62,423
Materials and equipment in warehouse [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at end of year 0    
Materials and equipment in warehouse [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 89,726 62,423 34,990
Amount at end of year 108,514 89,726 62,423
Drilling and work in progress [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 223,909 194,585 124,381
Increases 186,030 72,162 114,878
Translation effect 46,760 61,134 70,818
Adjustment for inflation 5,093 2,575 1,326
Decreases, reclassifications and other movements (172,436) (106,547) (116,818)
Amount at end of year 289,356 223,909 194,585
Drilling and work in progress [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 223,909 194,585 124,381
Amount at end of year 289,356 223,909 194,585
Exploratory Drilling in Progress [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 3,898 11,386 7,972
Increases 2,092 152 6,532
Translation effect 702 2,605 5,014
Decreases, reclassifications and other movements (2,464) (10,245) (8,132)
Amount at end of year 4,228 3,898 11,386
Exploratory Drilling in Progress [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 3,898 11,386 7,972
Amount at end of year 4,228 3,898 11,386
Furniture, fixtures and installations [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 62,805 41,017 24,717
Increases 91 121 106
Translation effect 13,923 17,133 14,289
Adjustment for inflation 1,049 537 828
Decreases, reclassifications and other movements 4,848 3,997 1,077
Amount at end of year 82,716 62,805 41,017
Furniture, fixtures and installations [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 53,975 35,117 20,707
Increases 5,206 4,092 2,536
Translation effect 11,898 14,394 11,935
Adjustment for inflation 961 489 773
Decreases, reclassifications and other movements 18 (117) (834)
Amount at end of year 72,058 53,975 35,117
Furniture, fixtures and installations [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 8,830 5,900 4,010
Amount at end of year 10,658 8,830 5,900
Selling equipment [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 106,419 70,135 40,998
Translation effect 24,027 30,261 25,116
Decreases, reclassifications and other movements 5,026 6,023 4,021
Amount at end of year 135,472 106,419 70,135
Selling equipment [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 67,530 44,271 25,697
Increases 6,331 4,493 2,765
Translation effect 15,415 18,791 15,822
Decreases, reclassifications and other movements (42) (25) (13)
Amount at end of year 89,234 67,530 44,271
Selling equipment [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 38,889 25,864 15,301
Amount at end of year 46,238 38,889 25,864
Infrastructure for Natural Gas Distribution [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 64,099 44,643 24,168
Increases   1,587 865
Adjustment for inflation 32,652 16,134 13,010
Decreases, reclassifications and other movements 5,360 1,735 6,600
Amount at end of year 102,111 64,099 44,643
Infrastructure for Natural Gas Distribution [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 33,572 23,877 12,508
Increases 1,931 1,287 989
Adjustment for inflation 17,102 8,629 6,733
Decreases, reclassifications and other movements (561) (221) 3,647
Amount at end of year 52,044 33,572 23,877
Infrastructure for Natural Gas Distribution [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 30,527 20,766 11,660
Amount at end of year 50,067 30,527 20,766
Other Property [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 64,916 46,706 31,637
Increases 1,068 341 589
Translation effect 11,391 14,969 13,581
Adjustment for inflation 6,712 3,416 4,793
Decreases, reclassifications and other movements 4,539 (516) (3,894)
Amount at end of year 88,626 64,916 46,706
Other Property [member] | Accumulated depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 48,831 34,041 22,458
Increases 2,670 1,727 1,325
Translation effect 8,731 11,135 9,862
Adjustment for inflation 5,118 2,497 3,270
Decreases, reclassifications and other movements (164) (569) (2,874)
Amount at end of year 65,186 48,831 34,041
Other Property [member] | Net book value of property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Amount at beginning of year 16,085 12,665 9,179
Amount at end of year $ 23,440 $ 16,085 $ 12,665