Income taxes - Deferred tax assets not recognized (Details) $ in Millions	Dec. 31, 2025 USD ($)
Deferred tax assets and liabilities
Undistributed reserves of subsidiaries for which no deferred tax liability is recognized	$ 4,271
Unrecognised deferred tax assets	2,899
France
Deferred tax assets and liabilities
Unrecognised deferred tax assets	1,153
Namibia
Deferred tax assets and liabilities
Unrecognised deferred tax assets	315
Australia
Deferred tax assets and liabilities
Unrecognised deferred tax assets	$ 201

The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Total for all associates [member]; Total for all subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries reported in separate financial statements]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2025-01-01
-Paragraph 81
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_81_f&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant