Income taxes - Deferred tax assets not recognized (Details) $ in Millions	Dec. 31, 2022 USD ($)
Deferred tax assets and liabilities
Undistributed reserves of subsidiaries for which no deferred tax liability is recognized	$ 1,103
Unrecognised deferred tax assets	3,854
France
Deferred tax assets and liabilities
Unrecognised deferred tax assets	1,189
Canada
Deferred tax assets and liabilities
Unrecognised deferred tax assets	$ 998

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: Associates [member]; 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 2022-03-24
-Paragraph 81
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_f&doctype=Standard
-URIDate 2022-03-24

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