Exploration and evaluation of oil and gas reserves (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Property plant and equipment
Opening Balance	$ 1,994	$ 3,024
Additions	379	459
Write-offs	(545)	(188)
Transfers	(83)	(1,097)
Translation adjustment	131	(204)
Closing Balance	1,876	1,994
Intangible Assets	2,406	2,576
Capitalized Exploratory Well Costs / Capitalized Acquisition Costs	$ 4,282	$ 4,570

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
-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 73
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e&doctype=Standard
-URIDate 2022-03-24

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