Exploration and evaluation of oil and gas reserves (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Property plant and equipment
Opening Balance	$ 1,876	$ 2,376
Additions	158	95
Write-offs	(1)	(14)
Transfers	(44)	(42)
Translation adjustment	155	(259)
Closing Balance	2,144	2,156
Intangible Assets	2,713	2,734
Capitalized Exploratory Well Costs / Capitalized Acquisition Costs	$ 4,857	$ 4,890

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 2023-01-01
-Paragraph 73
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e&doctype=Standard
-URIDate 2023-03-23

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