The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 6
-IssueDate 2021-01-01
-Paragraph 24
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2021-en-r&anchor=para_24_b&doctype=Standard
-URIDate 2021-03-24

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

Exploration expenses (Details) - USD ($) $ in Millions	12 Months Ended
Exploration expenses (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
IfrsStatementLineItems [Line Items]
Total exploration expenses			$ 9
Geological And Geophysical Expenses [Member]
IfrsStatementLineItems [Line Items]
Total exploration expenses			4
Decrease In Abandoned And Unproductive Wells [Member]
IfrsStatementLineItems [Line Items]
Total exploration expenses			$ 5