Basis of preparation - Disclosure of events after the reporting period (Details) $ in Millions	6 Months Ended
Jun. 30, 2022 USD ($)
Disclosure of non-adjusting events after reporting period [line items]
Applicable tax rate	40.00%
Changes in tax rates or tax laws enacted or announced [member]
Disclosure of non-adjusting events after reporting period [line items]
Applicable tax rate	65.00%
Deferred tax expense (income)	$ 800

The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph g
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_ii&doctype=Standard
-URIDate 2021-03-24

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