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v3.23.1

Financial and capital risk management - Net investment hedge (Details) bbl in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) bbl | Dec. 31, 2020 USD ($)
IfrsStatementLineItems [Line Items] |  |  |
Financial settlement inflows outflows | $ (83) | $ (197) | $ (34)
Nickel Revenue Hedging Programs Forward Options Sold [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Nominal amount of hedging instrument | 6,300 | 39,575 |
Average strike per ton | 34,929 |  |
Fair value of liabilities | $ 28 | $ (26) |
Financial settlement inflows outflows | (277) |  |
Value at risk | 11 |  |
Nickel Revenue Hedging Programs Forward Options Sold [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | 28 |  |
Nickel Revenue Hedge Program [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities | 28 | (26) |
Financial settlement inflows outflows | (277) |  |
Value at risk | 11 |  |
Nickel Revenue Hedge Program [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | 28 |  |
Palladium Revenue Hedging Programs Call Options Sold [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities |  | $ (1) |
Notional amount per barrel | bbl |  | 44,228 |
Palladium Revenue Hedging Programs Put Options Bought [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities |  | $ 26 |
Financial settlement inflows outflows | 15 |  |
Notional amount per barrel | bbl |  | 44,228 |
Palladium Revenue Hedge Program [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities |  | $ 25 |
Financial settlement inflows outflows | $ 15 |  |

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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The measure of a potential loss exposure as a result of future market movements, based on a specified confidence interval and measurement horizon. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 41 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_41&doctype=Standard -URIDate 2022-03-24 + Details
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