The increase (decrease) in property, plant and equipment resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of liabilities that the entity does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
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- Definition

The amount of liabilities of uncertain timing or amount, including provisions for employee benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
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- Definition

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

+ References

No definition available.

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Disclosure of provisions.

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Provisions - Summary of Changes in Group's Provisions (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of provisions [line items]
Abandonment of hydrocarbon wells cost	$ (219)	$ 169	$ 507
Hydrocarbon wells abandonment obligations [Member] \| Assets and liabilities classified as held for sale [member] \| Optimization plan [Member]
Disclosure of provisions [line items]
Provisions	242
Environmental liabilities [Member] \| Assets and liabilities classified as held for sale [member] \| Optimization plan [Member]
Disclosure of provisions [line items]
Provisions	4
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	(219)	$ 169	$ 494
Transportadora De Gas Del Norte SA [member]
Disclosure of provisions [line items]
Other liabilities	$ 134