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Exploration and evaluation of oil and gas reserves (Details 3)
Number in Millions, $ in Millions
Dec. 31, 2023
USD ($)
Number
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 1,301
Capitalized costs | Number 22
Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 238
Capitalized costs | Number 3
Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 87
Capitalized costs | Number 2
Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 20
Capitalized costs | Number 16
Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 956
Capitalized costs | Number 1