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Provisions - Summary of Changes in Group's Provisions (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Non current [member]      
Disclosure of provisions [line items]      
Provisions beginning balance $ 186,488 $ 144,768 $ 83,388
Increases charged to expenses 66,438 23,462 27,564
Decreases charged to income (13,922) (11,804) (5,371)
Applications due to utilization (655) (43) (73)
Reclassifications and other movements (17,738) (21,045) (3,751)
Net exchange and translation differences 37,912 51,185 43,103
Result from net monetary position (45) (35) (92)
Provisions ending balance 258,478 186,488 144,768
Non current [member] | Provision for lawsuits and contingencies [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 50,369 43,833 21,235
Increases charged to expenses 40,607 8,917 18,460
Decreases charged to income (4,278) (6,331) (2,358)
Applications due to utilization (655) (43) (73)
Reclassifications and other movements (4,283) (5,447) (744)
Net exchange and translation differences 7,758 9,475 7,405
Result from net monetary position (45) (35) (92)
Provisions ending balance 89,473 50,369 43,833
Non current [member] | Provision for environmental liabilities [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 5,531 3,828 3,720
Increases charged to expenses 10,876 3,428 1,695
Decreases charged to income (12) (224) (63)
Reclassifications and other movements (6,888) (2,026) (2,003)
Net exchange and translation differences 295 525 479
Provisions ending balance 9,802 5,531 3,828
Non current [member] | Provision for Hydrocarbon Wells Abandonment Obligations [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 130,588 97,107 58,433
Increases charged to expenses 14,955 11,117 7,409
Decreases charged to income (9,632) (5,249) (2,950)
Reclassifications and other movements (6,567) (13,572) (1,004)
Net exchange and translation differences 29,859 41,185 35,219
Provisions ending balance 159,203 130,588 97,107
Current [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 6,133 5,460 4,529
Increases charged to expenses 199 219 9
Decreases charged to income (3,574) (1,039) (744)
Applications due to utilization (4,953) (2,760) (4,789)
Reclassifications and other movements 20,742 2,783 4,827
Net exchange and translation differences 750 1,470 1,628
Provisions ending balance 19,297 6,133 5,460
Current [member] | Provision for lawsuits and contingencies [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 1,934 1,285 1,123
Increases charged to expenses 199 219 9
Decreases charged to income (3,574) (1,039) (744)
Applications due to utilization (676) (132) (194)
Reclassifications and other movements 3,938 1,103 648
Net exchange and translation differences 383 498 443
Provisions ending balance 2,204 1,934 1,285
Current [member] | Provision for environmental liabilities [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 2,618 1,910 1,622
Applications due to utilization (2,489) (1,330) (1,821)
Reclassifications and other movements 6,888 2,026 2,003
Net exchange and translation differences 6 12 106
Provisions ending balance 7,023 2,618 1,910
Current [member] | Provision for Hydrocarbon Wells Abandonment Obligations [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 1,581 2,265 1,784
Applications due to utilization (1,788) (1,298) (2,774)
Reclassifications and other movements 9,916 (346) 2,176
Net exchange and translation differences 361 960 1,079
Provisions ending balance $ 10,070 $ 1,581 $ 2,265