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Provisions - Summary of Changes in Group's Provisions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Non current [member]      
Disclosure of provisions [line items]      
Provisions beginning balance $ 2,571 $ 2,519 $ 2,219
Increases charged to expenses 433 471 662
Decreases charged to income (38) (396) (136)
Applications due to utilization (1) (12) (7)
Net exchange and translation differences (162) (63) (35)
Reclassifications and other movements (142) 53 (184)
Result from net monetary position [1] (1) (1) 0
Provisions ending balance 2,660 2,571 2,519
Non current [member] | Provision for lawsuits and contingencies [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 571 872 599
Increases charged to expenses 89 187 [2] 400 [2]
Decreases charged to income (26) (354) [3] (42)
Applications due to utilization (1) (12) (7)
Net exchange and translation differences (110) (55) (31)
Reclassifications and other movements (456) [4] (66) [5] (47)
Result from net monetary position [1] (1) (1) 0
Provisions ending balance 66 571 872
Non current [member] | Provision for environmental liabilities [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 96 96 66
Increases charged to expenses 80 69 105
Decreases charged to income 0 (1) 0
Net exchange and translation differences (52) (8) (4)
Reclassifications and other movements (76) (60) (71)
Provisions ending balance 48 96 96
Non current [member] | Provision for Hydrocarbon Wells Abandonment Obligations [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 1,904 1,551 1,554
Increases charged to expenses 264 215 157
Decreases charged to income (12) (41) (94)
Net exchange and translation differences 0 0 0
Reclassifications and other movements [6] 390 179 (66)
Provisions ending balance 2,546 1,904 1,551
Current [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 199 188 73
Increases charged to expenses 3 0 1
Decreases charged to income (6) 0 (37)
Applications due to utilization (490) (139) (48)
Net exchange and translation differences (39) (34) (12)
Reclassifications and other movements 514 184 211
Provisions ending balance 181 199 188
Current [member] | Provision for lawsuits and contingencies [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 22 22 23
Increases charged to expenses 3 0 1
Decreases charged to income (6) 0 (37)
Applications due to utilization (318) [7] (35) (7)
Net exchange and translation differences (1) 0 0
Reclassifications and other movements 321 35 42
Provisions ending balance 21 22 22
Current [member] | Provision for environmental liabilities [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 46 68 31
Applications due to utilization (50) (48) (22)
Net exchange and translation differences (38) (34) (12)
Reclassifications and other movements 76 60 71
Provisions ending balance 34 46 68
Current [member] | Provision for Hydrocarbon Wells Abandonment Obligations [member]      
Disclosure of provisions [line items]      
Provisions beginning balance 131 98 19
Applications due to utilization (122) (56) (19)
Net exchange and translation differences 0 0 0
Reclassifications and other movements [6] 117 89 98
Provisions ending balance $ 126 $ 131 $ 98
[1] Includes the adjustment for inflation of opening balances of provisions of subsidiaries with the peso as functional currency which was charged to “Other comprehensive income” in the statement of comprehensive income and the adjustment for inflation of the fiscal year, which was charged to net income in the statement of comprehensive income.
[2] Includes the accrual of financial interest corresponding to the recognition of the dispute relating to the tax deduction of hydrocarbon wells abandonment costs for periods 2014-2017.
[3] Includes 30 corresponding to the recovery of liabilities for the regularization regimes associated with the dispute relating to the cost deduction for hydrocarbon wells abandonment for periods 2014-2017. See Note 16.a.5).
[4] Includes 134 reclassified as “Other liabilities” in the statement of financial position due to the settlement agreement entered with TGN and 286 reclassified as current Provision for lawsuits and contingencies due to the Trust Settlement Agreement. See Notes 16.a.2) and 32, respectively.
[5] Includes 22 reclassified as “Income tax liability” in the statement of financial position for the regularization regimes associated with the dispute relating to the tax deduction of hydrocarbon well abandonment costs for periods 2014-2017. See Note 16.a.5).
[6] Includes 507, 268 and 32 corresponding to the annual recalculation of hydrocarbon wells abandonment cost for the years ended December 31, 2023, 2022 and 2021, respectively.
[7] Includes the payment of the amount for the Trust Settlement Agreement. See Note 32.