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Amount reclassified as current provision due to the trust settlement agreement.

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Provisions - Summary of Changes in Group's Provisions (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of provisions [line items]
Abandonment of hydrocarbon wells cost	$ 169	$ 507	$ 268
Hydrocarbon wells abandonment obligations [Member] \| Assets and liabilities classified as held for sale [member]
Disclosure of provisions [line items]
Provisions	2,023
Environmental liabilities [Member] \| Assets and liabilities classified as held for sale [member]
Disclosure of provisions [line items]
Provisions	54
Trust Settlement Agreement [Member]
Disclosure of provisions [line items]
Amount reclassified as current provision due to the Trust Settlement Agreement	286
Hydrocarbon Wells Abandonmnet Cost [member]
Disclosure of provisions [line items]
Abandonment of hydrocarbon wells cost	169	$ 507	$ 268
Hydrocarbon Wells Abandonmnet Cost [member] \| Dispute relating to the tax deduction of hydrocarbon well abandonment costs for periods 2014-2017 [member]
Disclosure of provisions [line items]
Recovery of Liabilities of Dispute relating to tax Deduction	30
Hydrocarbon Wells Abandonmnet Cost [member] \| Other contingent liabilities [member] \| Dispute relating to the tax deduction of hydrocarbon well abandonment costs for periods 2014-2017 [member] \| Administracion Federal De Ingresos Publicos [member]
Disclosure of provisions [line items]
Increase decrease through transfers and other changes other provisions	22
Transportadora De Gas Del Norte SA [member]
Disclosure of provisions [line items]
Other liabilities	$ 134