Brumadinho dam failure - Insurance (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)
Brumadinho event.
Disclosure of contingent liabilities [line items]
Compensation received	$ 19

The amount of revenue arising from the groups of insurance contracts issued. Insurance revenue shall depict the provision of services arising from the group of insurance contracts at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those services. [Refer: Insurance contracts issued [member]; Revenue]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2023-01-01
-Name IFRS
-Number 17
-IssueDate 2021-01-01
-Paragraph 80
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2021-en-r&anchor=para_80_a&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2023-01-01
-Name IFRS
-Number 17
-IssueDate 2021-01-01
-Paragraph 106
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2021-en-r&anchor=para_106&doctype=Standard
-URIDate 2021-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2023-01-01
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 82
-Subparagraph a
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_82_a_ii&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_InsuranceRevenue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration