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Brumadinho dam failure - De-characterization of other dams in Brazil (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
De-characterization of dams |  |
Provisions. |  |
Provisions | $ 2,289 | $ 2,489
De-characterization of upstream structures |  |
Provisions. |  |
Provisions | 369 |
Provision for total expected costs to carry out all de-characterization projects | 369 |
De-characterization of other structures |  |
Provisions. |  |
Provisions | 248 |
Provision for total expected costs to carry out all de-characterization projects | $ 248 |

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- Definition The amount of provision for costs related to decommissioning, restoration and rehabilitation. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Section D Examples: disclosures -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_D_TI -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 87 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_87&doctype=Standard -URIDate 2020-01-01 + Details
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