Income Tax - Summary of Calculation of Income Tax Expense Accrued (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Calculation of the Income Tax Expense Accrued [Abstract]
Current income tax	$ (137)	$ (45)	$ (31)
Deferred income tax	1,349	(975)	(810)
Income tax expense	1,212	(1,020)	(841)
Income tax – Well abandonment	0	0	19
Income tax (expense)/ benefit	$ 1,212	$ (1,020)	$ (822)

The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 81
-Subparagraph g
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_ii&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_DeferredTaxExpenseIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration