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v3.23.1

Financial and capital risk management - Embedded derivatives in contracts (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
IfrsStatementLineItems [Line Items] |  |  |
Financial settlement inflows outflows | $ (83) | $ (197) | $ (34)
Fixed Price Sales Protection Nickel Forwards Bought [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Nominal amount of hedging instrument | 766 | 342 |
Average strike per ton | 21,214 |  |
Fair value of liabilities | $ 7 | $ 1 |
Financial settlement inflows outflows | 3 |  |
Value at risk | 1 |  |
Fixed Price Sales Protection Nickel Forwards Bought [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | $ 7 |  |
Hedge Program For Products Acquisition For Resale Nickel Forwards Sold [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Nominal amount of hedging instrument | 384 | 1,206 |
Average strike per ton | 28,657 |  |
Fair value of liabilities | $ (1) | $ (1) |
Financial settlement inflows outflows | 7 |  |
Value at risk | 1 |  |
Hedge Program For Products Acquisition For Resale Nickel Forwards Sold [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | (1) |  |
Nickel Forwards [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities | 6 |  |
Financial settlement inflows outflows | 10 |  |
Value at risk | 2 |  |
Nickel Forwards [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | $ 6 |  |
Call Option Spc Brought [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Nominal amount of hedging instrument |  | 137,751,623 |
Fair value of liabilities |  | $ 13 |
Embedded Call Options Sold [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Nominal amount of hedging instrument | 746,667 | 729,571 |
Average strike per ton | 233 |  |
Fair value of liabilities | $ (5) | $ (1) |
Value at risk | 3 |  |
Embedded Call Options Sold [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | (5) |  |
Call Options [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of liabilities | (5) | $ 12 |
Value at risk | 3 |  |
Call Options [Member] | Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Value at risk | $ (5) |  |

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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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- References No definition available. + Details
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- References No definition available. + Details
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