Additional Information - Summary of Results from Operation from Oil and Gas Production Activities (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure In Tabular Form Of Results Of Operation From Oil And Gas Production Activities [Line Items]
Reversal of valuation provision	$ 1,917	$ 900	$ 1,048
Petroleum Resource Rent Tax [member]
Disclosure In Tabular Form Of Results Of Operation From Oil And Gas Production Activities [Line Items]
Deferred tax expense/(benefit)	$ 531	$ (814)	$ 297

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 2023-01-01
-Paragraph 81
-Subparagraph g
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_g_ii&doctype=Standard
-URIDate 2023-03-23

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