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Risk management (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Guarantees given as collateral $ 96 $ 42
Commodity Derivatives [Member]    
IfrsStatementLineItems [Line Items]    
Guarantees given as collateral $ 96 15
Currency Derivatives [Member]    
IfrsStatementLineItems [Line Items]    
Guarantees given as collateral   $ 27