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Financial and capital risk management - Sensitivity analysis of hedge accounting (Details) - Risk Nickel Price Increase [Member] $ in Millions	Dec. 31, 2022 USD ($)
Nickel Revenue Hedge Program Options [Member]
IfrsStatementLineItems [Line Items]
Fair value of liabilities	$ 28
Nickel Revenue Hedge Program Options [Member] | Scenario I
IfrsStatementLineItems [Line Items]
Fair value of liabilities	(19)
Nickel Revenue Hedge Program Options [Member] | Sensitivity Scenario Ii [Member]
IfrsStatementLineItems [Line Items]
Fair value of liabilities	(65)
Nickel Revenue Hedging Program Protected Item Part Of Nickel Revenues With Fixed Sales Prices [Member] | Scenario I
IfrsStatementLineItems [Line Items]
Fair value of liabilities	19
Nickel Revenue Hedging Program Protected Item Part Of Nickel Revenues With Fixed Sales Prices [Member] | Sensitivity Scenario Ii [Member]
IfrsStatementLineItems [Line Items]
Fair value of liabilities	$ 65

X

- 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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- References

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