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Financial and capital risk management - Embedded derivatives in contracts (Details 7) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Fixed Price Sales Protection Nickel Forwards Bought [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Nominal amount of hedging instrument | 2,580 | 766
Average strike per ton | 20,842 |
Fair value of liabilities |  | $ 7
Financial settlement inflows outflows | $ 3 |
Value at risk | 3 |
Hedge Program For Products Acquisition For Resale Nickel Forwards Sold [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Nominal amount of hedging instrument |  | 384
Fair value of liabilities |  | $ (1)
Financial settlement inflows outflows | 2 |
Nickel Forwards [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities |  | $ 6
Financial settlement inflows outflows | 5 |
Value at risk | $ 3 |
Embedded Call Options Sold [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Nominal amount of hedging instrument | 746,667 | 746,667
Average strike per ton | 233 |
Fair value of liabilities | $ (3) | $ (5)
Value at risk | 2 |
Embedded Call Options Sold [Member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Value at risk | (3) |
Call Options [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of liabilities | (3) | $ (5)
Value at risk | 2 |
Call Options [Member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Value at risk | $ (3) |

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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 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2023-03-23 + Details
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- References No definition available. + Details
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- References No definition available. + Details
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- Details
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- Details
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