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Exploration and evaluation of oil and gas reserves (Details 3)
$ in Millions
Dec. 31, 2024
USD ($)
Number
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 1,164
Capitalized costs | Number 22
Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 76
Capitalized costs | Number 2
Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 209
Capitalized costs | Number 3
Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 73
Capitalized costs | Number 2
Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 17
Capitalized costs | Number 1
Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Capitalized costs | $ $ 789
Capitalized costs | Number 14